Airborne wind energy is a promising newly emerging wind energy harvesting technology. Due to low material use and high potential harvesting density it aspires to be competitor to the conventional wind turbines we see today. Kitepower bv, a company in the Netherlands, is developing a airborne wind energy system based on a flexible kite. To be able to get a share in the energy market, reliability, safety and long term operation are aspects that are still challenging. The kite is controlled by a robot, called a kite control unit(KCU), that is suspended under the wing and steers the wing inside the wind window to create a traction force. This research focuses on improving long term operation by improving the power supply of this KCU. A wind turbine attached to the KCU is used as a power supply, but the electronic power conversion has not been optimized yet. A maximum power point tracker is optimised for this system, in which a new control model is used. Here the rotational speed is taken as a controlled variable. In addition, a method to protect the battery and the electrical system is implemented when abundant energy is available. This research shows how a converter is designed and how it can be controlled to provide the demanded functionalities.

LVDC Distribution systems are becoming popular due to the avenue of integrating renewable energy sources on a large scale. Predominant DC based power system architecture has been predicted to serve the needs of a sustainable society that holds the capability to self-generate, share, and trade power produced from renewable energy sources. Bottom - up approach beginning from development of products that run on DC till microgrids and integration of rural communities using LVDC distribution presents as a promising avenue for adoption of DC grids worldwide. Many areas in DC distribution system are yet to undergo rigorous study both theoretically and practically. Touch protection is one such area which is largely unexplored. Residual current devices (RCD) are traditionally implemented at the load side to trip at specific residual current levels ranging from few to hundreds of milli amperes. Current trip thresholds and time within which the fault must be isolated are different for DC. There is dearth of standards for DC RCD. In this thesis project we attempt to design a compact, reliable, and cost-effective RCD. The designed and developed prototype is tested at DC Low Voltage levels for various residual current magnitudes to determine important parameters like reaction time and accuracy.

Offshore wind power plants are subject to adverse electrical conditions that are more severe than onshore cases, due to the long cable connection to the shore. Among these conditions are amplified voltage distortion at (inter)harmonic frequencies, as well as stability issues. An important aspect of wind turbine generator control is the phase-locked loop (PLL), a method to synchronize the output current with the grid voltage. In the case of voltage distortion, an error occurs in the estimated phase-angle of the PLL, which results in an additional distortion in the output current. This research focuses on 5 different variants of PLLs and compares their behaviour when implemented in a grid-side inverter of a wind turbine. The comparison is based on deriving the equivalent small-signal output impedance of the inverter for each PLL, which can be used for stability analysis of the wind farm connected to the onshore grid by a typical cable connection. A conclusion is drawn on the effect of each PLL variant on the output distortion as well as the stability.

Recently, there have been numerous DC microgrids coming up in every sector. Some of these microgrids operate as independent entities with their own renewable energy sources, active loads, distribution networks and energy storage units. However, they are not highly reliable as the renewable energy sources are location and climate dependent. Having a large energy storage unit can be one possible solution, but that involves high expenditure and occupies a large amount of space. Thus, an alternative is to connect the independent DC microgrid to an established AC grid. With the advancements in power electronic technologies, such a connection can be established by a multi-stage converter known as Solid state transformer (SST). Numerous studies have been conducted on SSTs for low-voltage levels, and there is a wide scope for research in the area of medium and high-voltage converters. Also, the scope of using Planar transformer (PT) as high-frequency transformers in DC-DC converters for medium and high-voltage applications is yet to be extensively explored. Hence, the main focus of this thesis would be to develop an isolated bidirectional DC-DC converter with a planar transformer that can be used in an SST which can potentially connect a low-voltage DC microgrid comprising a solar-based car parking system, to a medium-voltage AC grid. Firstly, various DC-DC converter topologies have been investigated, and the single phase Dual active full bridge (DAFB) is chosen as the best suitable topology for this application. Secondly, various control strategies have been investigated, and single-phase shift control has been implemented due to its simple control techniques and low data transfer requirement across high isolation. Thereafter, a script is developed to identify the optimal parameters for the Dual active bridge (DAB) and PT design. Further, the planar transformer with high isolation is realized by considering various factors like shielding and termination into account. Finally, a single-cell prototype is developed and tested for DAB operation and isolation requirement of the designed planar transformer. The result of the presented work is a single-cell isolated bidirectional DC-DC converter rated for 12 kW designed and developed with a PT rated for 16.3 kV isolation.

With an increase in higher power (ultra) fast EV charging stations and a new EU law for mandatory deployments of EV charging stations, an optimal MVAC grid connection for these charging stations is desired. Considering this connection, the use of a solid-state transformer (SST) performs better in terms of weight, size and efficiency with a similar cost, compared to the conventional low-frequency transformer (LFT) for MVAC to LVDC conversions. This study compares three MMC-based SST topologies where a DAB is connected to each submodule: Double-Star, Single-Star and Single-Delta. The cost of an MMC mainly depends upon the required energy storage and the switch stress. The topologies are therefore mainly compared based on these parameters, but other parameters are considered as well. With the goal of minimising the required energy storage, an 80% MMC energy storage reduction compared to the theoretical minimum requirement has been achieved by control. A novel mathematical model has been proposed for each SST; this uses an MMC model based on the switching function and a DAB model based on the single phase-shift control. The model has been implemented in simulation and proven to accurately determine the average behaviour of the SST while significantly reducing the simulation complexity and time. This model helps to understand the SST's behaviour and furthermore allows for control system tuning both manually and automatically using the Genetic Algorithm. Three different control systems have been designed. Control system A, where the MMC current is controlled by the average submodule voltage and the DAB controls the LVDC bus voltage. Control system B, where the DAB controls each individual submodule voltage and the MMC current is controlled by the LVDC bus voltage. Control system C, which is similar to control system B, but uses a stable DC voltage source on the LVDC bus and a set MMC current. An improved DAB control has been designed for control systems B and C, resulting in control systems B* and C*. This control is based on the use of a current feedforward and a PI controller combined with the inverted equations of the DAB model. The three topologies have been successfully simulated with this improved DAB control system using an 80% MMC energy storage reduction compared to the theoretical minimum requirement. This improves the general behaviour and significantly reduces the cost of the SST. The improved DAB control system has been tested using a hardware DAB with a current step input, which has shown that the new control system performs better in voltage peak reduction compared to PI control. Out of the three topologies, the Single-Star topology performs the best. It has the lowest energy storage requirement and switch stress. Furthermore, its behaviour lies the closest to the ideal model. The best result for the Single-Star SST is achieved with the proposed improved DAB control, which leads to the lowest energy storage requirement, switch stress, THD, submodule voltage deviations and settling time. Out of these two control systems, C* performs the best.

Based on a research conducted by the Civil Aviation Organization, by the year 2050 the emissions of aviation are expected to be 7 to 10 times higher than the levels in the beginning of the century. This will result in the emissions of CO2 from the aviation industry alone, to be higher than what the entire transportation industry is allowed for, according to the Paris Agreement. While the High Speed Rail in­dustry has partially helped to suppress these emissions, it cannot really compete with aviation in speed or costs. And so, now more than ever, it is important to start thinking about alternative transportation modes, which will not only reduce the carbon emissions but will also be able to compete with aviationin terms of safety, comfort, speed and cost. A viable alternative, on which scientists and engineers have worked on since the beginning of the 20th century is Hyperloop. This system comes with a dramatically lower energy consumption compared to airplanes and even high speed trains. Furthermore, the Hyperloop system has shown capability to reach speeds which are comparable to, or even higher than those of airplanes. And so, this thesis work investigates the application of a primary segmented permanent magnet linear synchronous motor as a driving source in a high speed transportation system. The motor con­sidered has a short primary and long secondary (mover), with the primary being the static part hence resulting in an active guideway transportation system. The segmentation of the primary, into several stator blocks, results in discontinuities of the electromagnetic circuit of the motor which gives rise to ac­celeration and thrust losses in the form of dips. These irregularities will also lead to high jerking motions which result in a very uncomfortable travelling experience and may also lead to mechanical stresses and breakdowns in the system. Here, a preactivation strategy is proposed, which will be incorporated in the control domain of the inverter units and will suppress the distortions occurring in the acceleration and thrust characteristics. The uniqueness of this proposal lays on the fact that no complex control strategies are involved in the solution, the approach is very practical and can be easily incorporated in the control system. The work carried out and presented in this thesis report includes the design of an algorithm used to describe the magnetic interaction between the primary and secondary and a predic­tive algorithm used to generate an inverter activation command signal which will be responsible for the preactivation of any inverter unit. Moreover, considerations and implications related to the particular solution are also given. The strategy proposed results in significant improvement of the behavior of the motor system during propulsion, accompanied by the reduction of the dips in the acceleration and thrust profiles.Furthermore, an extensive thermal analysis has also been carried out with regards to the thermal developments in the power modules installed in each inverter unit that will be supplying each stator block. Considering the fact that the duty cycle of these inverter units is rather short, the aim of this part of the research is to prove whether underrated power modules can be used in this application. Referring to the obtained results it can be concluded that such a strategy can be applied provided that several technical requirements are satisfied. The successful implementation of such strategy has the potential to lead to substantial financial benefits in terms of product costs.

Photovoltaic (PV) system yield prediction models are an important topic in the field of PV solar energy. An accurate prediction model could not only be used for optimising the PV system design, but is also expected to realise the yield potential of innovative PV technologies. In the next generation of PV technologies, one of the most promising concepts is the tandem solar cells. In recent years, these cells have impressed the solar industry by their rapid growth of the maximum power conversion efficiency (PCE). Since tandem solar cells are still at the lab phase, their yield potential under realistic conditions are an interesting field of study as well. However, the existing yield prediction models are not yet available for these tandem cells. In order to fill this gap, a prediction model developed in the Photovoltaic Materials and Devices (PVMD) group of TU Delft, called the PVMD Toolbox, has been adapted to be compatible with the tandem solar cells. In this thesis project, the version 3 of the Toolbox was developed. First the PVMD Toolbox was improved. Except monofacial c-Si cells and bifacial c-Si cell, it is now also available for tandem cells. One of the most promising tandem concepts, the perovskite/c-Si tandem, was taken as a reference tandem configuration integrated in the Toolbox. The Toolbox was also modified to take the influence of solar spectra into consideration and analyses cell performances individually. Secondly, the accuracy of the Toolbox was validated. A new figure of merit called 'relative total deviation' is put forward in this report, which calculates the ratio between the sum of deviations that each simulation introduces, and the total measured energy yield. When the electrical parameters were taken from the own measurements, the relative total deviation of simulation results was only 8.6%. Finally, the Toolbox was applied to two case studies. In the first study, it was found that the annual energy yield (AEY) of perovskite tandems can be increased up to 0.4% by optimising perovskite thickness for a certain location. The second case study compared the AEY of the tandem module and conventional c-Si module. Perovskite tandem module showed a high AEY, around 36% higher than that of the c-Si module. However, perovskite tandem had a lower specific yield as they are more sensitive to the spectral variation

LED lamps becomemore and more economically attractive in the lighting market, primarily thanks to their great energy saving, long lifetime and ever decreasing cost compared with the conventional lighting solutions, such as incandescent or fluorescent ones. A traditional fluorescent lighting system consists of a fluorescent lamp(s) and a magnetic/electronic ballast. A direct replacement of a fluorescent lamp by a LED lamp with the same formfactor and pin connection avoids any rewiring or removal of the ballast, which is known as the retrofit concept. The retrofit LED lamps further guarantee a minimal total cost of ownership. This work investigates the compatibility issues between the T5 Retrofit LED lamps and the legacy electronic ballasts. The compatibility design focuses on the following points: 1. The LED lamps should generate stable light output at the specified lumen level; 2. The lifetime and reliability of the LED lamps and ballasts fulfill the given specifications; 3. The driver design should fit into the T5 tubes. Two methods to ensure the compatibility have been studied, a passivemethod and an active method. The passive method utilizes inductance and capacitance to increase the load impedance seen by the ballasts so as to reduce the ballast output current and control the ballast thermal issues. Four structures with inductance and capacitance haven been analyzed by means of mathematical analysis and simulations. The active method realizes the LED current control that is absent in the passive method. Efforts are conducted to reduce the size of the two proposed active circuits. After the simulation analysis of each designs, a demonstration board has been built for experimental verification. Combining the passive methods with the active ones, four possible solutions that satisfy the design requirements are found. The comparisons between these solutions and the design suggestions are given in the last chapter.

Ever since inception of field of electronics, electronic devices are getting smaller, lighter and more power efficient. At the same time computing power of the devices is increasing exponentially. There is an ongoing demand for power supplies of computing devices to get smaller, more energy dense while achieving higher efficiency. LLC resonant converters are replacing forward converters in DC-DC conversion due to their higher efficiency and magnetic integration. Size reduction in LLC resonant converter is possible by shifting towards 500kHz operation. But this shift comes with additional problems with regards to control mechanism and switching losses. The aim of this thesis is to design and prototype an LLC resonant converter. Problems associated with design and operation at 500kHz are identified and solutions are suggested to overcome such problems. The operation principle of LLC resonant converter is also explained in detail. The results prove that size reduction is possible while maintaining higher efficiency but certain limitations stop further reduction of size.

Access to electricity still lacks for a fifth of the world's population. Most of the areas are in the remote rural location. Due to the off-grid location, policies, and other social factors, the grid expansion in these areas is not economically viable. Installing Solar Home Systems (SHS) is considered to be a promising immediate solution, given that most of these areas are in the tropical region where it has the highest sun-hours in the world. SHS consists of PV modules for the energy generation, batteries for the energy storage, converters for the energy conversion, and load appliances for the energy consumption. However, its high ambient temperature can potentially harm the SHS in decreasing the performance and shortening the lifetime. The lower performance and lifetime can directly translate to have high capital expenses. Therefore a precise quantification of the performance and the lifetime is essential to all the stakeholders. This thesis aims to evaluate and quantify the influence of temperature on the performance and the lifetime of SHS. To achieve the research goal, an integrated SHS model is proposed by considering the performance and the aging behavior of both PV modules and the batteries. Two different battery technologies: Li-ion and Lead-acid are involved in the evaluation. Moreover, the analysis was conducted for Sumba Island, Indonesia since it has great solar potential and also the potential market for the SHS. Furthermore, this work presents a comprehensive investigation of temperature impact from the PV module and battery component level to the system level. Initial system design has been performed in which it requires a 330 Wp PV module, with a tilt and azimuth angle of 11 degrees and 6 degrees respectively, and 960 Wh of batteries to achieve the LLP of 9.5%. The simulation result of the PV component showed clearly that the PV energy yield reduces due to the higher ambient temperature is used. As for the battery, there is a converse behavior concerning the temperature impact in which an increase in temperature gives a positive effect on the capacity and internal resistance in the short term. However, in the long run, it has a severe aging rate. By combining PV module and battery element in an integrated SHS model, it is shown that it achieves to have a 7.4% lower LLP compared to the initial sizing. However, as the aging plays a part, the LLP increases exponentially over the years and can achieve almost doubled the initial LLP. As the ambient temperature increases, it brings negative impacts for the SHS in terms of the performance and the lifetime. It results to have even higher LLP. A decreasing trend of battery lifetime is observed as the ambient temperature increases. Furthermore, it is seen that the system lifetime is limited by the battery lifetime.

Because of its superior conduction and switching performance, and falling price, Gallium Nitride (GaN) power semiconductor device is expected to bring improvements to the power electronics system, including higher efficiency and higher power density. How will the new semiconductor device benefit the rapidly growing Electric Vehicle (EV) charging application, where high efficiency, high power density are two of the most important design requirements? In order to verify the match between the new semiconductors and the EV charger application, hardware demonstration needs to be carried out. In this thesis project, the design of a GaN-based, high switching frequency, single phase, 2KW PFC converter for EV charging will be introduced. The operation principle and control of the converter will be explained, and the hardware demonstration results will be shown. The testing results prove the high-efficiency, high-frequency abilities of the new technology.

Developing renewable energy sources entails new challenges which have not been faced previously by the traditional grid. One of the issues is the variability of renewable resources due to their characteristics of weather. The intermittent nature produces uncertainty in generation output, especially in solar and wind power generation. As penetration of both sources increase, variability will be more difficult to handle. And even as this issue is being resolved, another one, that of the application of an energy storage system has arisen. The energy storage is the current and typical means of smoothing wind- or solar-power generation fluctuations. Conducted research mostly developed an energy storage for only one technology, however, different technologies can be combined and complement each other which significantly improve the storage system’s performance. In this research, a hybrid energy storage (HES) is proposed to mitigate power fluctuations of renewable plant output power. This thesis aims to give understanding of the effective strategy of a hybrid energy storage for PV power output and wind power output fluctuation suppression. The strategy will stand as the foundation for a broader framework which aims to optimize the size of hybrid energy capacity to enable such application in uncertain condition. Wavelet power sharing method is proposed as the strategy to operate the hybrid energy storage using frequency-based method. The strategy can decompose the frequency component of renewable power quickly and allocate the power to the respective device. In this paper, battery and supercapacitor is adopted to meet the electric grid technical requirements for smoothing renewable power. The results show that the supercapacitor peak fluctuations of battery power are moderated by adding the supercapacitor, providing lower peaks and slower derivative of power fed to/drawn from the battery. The result from the power sharing is suitable in terms of improving the battery lifetime. Battery lasts for 1.3 years in a conventional energy storage system, while it can last up to 6 years in the hybrid energy storage. After getting the optimal power allocation between storage devices, sizing the capacity of hybrid energy storage also considers uncertainty in power output. This research uses investment storage cost, penalty and life cycle cost as the objective function, while hybrid energy storage’s state of charge and the power fluctuation performance as the constraint. The chance constrained programming is used to make the fluctuation of output power under a certain confidence level, which also meet the electrical quality and economy. The optimal solution of hybrid energy storage capacity is carried out by using genetic algorithm based on stochastic simulation. The results show that, with the confidence level of smoothing requirement up to 90%, system contains two energy storage has a lower total cost than a single-sourced energy storage.

Low voltage direct current (LVDC) networks used as electricity distribution systems for a community have the potential of operating at higher efficiencies and can integrate various distributed renewable energy sources and storage elements. However, their emergence is being hindered due to the lack of reliable fault protection techniques. DC faults exhibit extremely fast current rise rates as compared to faults in AC grids. Therefore, this research focuses on developing a fast fault detection and isolation technique applicable especially in LVDC networks. Fault isolation was achieved via solid state circuit breakers (SSCB) due to their fast functioning capability and high controllability levels. For quick fault detection two distinct techniques were selected. The first measured the distribution line’s rate of change of current while the second technique determined the current magnitude by measuring the on-state voltage across the SSCB’s semiconductor device. The complete design of the fault detection circuits leading to isolation has been presented in this research work. The performance of both the designed detection circuits and fault isolation via the SSCB have been validated through practical experiments. The results demonstrated that isolation of the fault subsequent to its occurrence is achievable in just a few microseconds. Hence, this implies that the fast rising DC fault currents can be detected and interrupted in adequate time prior to resulting in any hazardous consequences.

Global average temperatures are setting new records compared to the previous decade, primarily due to the accumulation of greenhouse gases such as CO2. The growth potential in emerging economies worsens the current global situation. These CO2 emissions are needed to be curtained and efforts are underway. The emissions target set by the International Maritime Organization seems far-fetched given the forecast for the growth of the shipping sector. Although electrification has proven to reduce emissions, the energy efficiency metrics (EEDI, EEXI) are incapable of providing the quantitative benefits that can be realized by switching to a bipolar DC (BiDC) grid when compared with the AC grid. This thesis aims to evaluate the feasibility of BiDC grids over the complete operating profile of the ship by comparing ten arrangements, five for AC and five for DC, with the Key Performance Indicators (KPIs). The arrangements are two diesel generators (AC1 & DC1), two diesel generators and battery (AC2 & DC2), two diesel generators, battery, and shore power (AC3 & DC3), one diesel generator and battery (AC4 & DC4), one diesel generator, battery, and shore power (AC5 & DC5). The comparison is made for key performance indicators like CO2 emissions, fuel consumption, electrical power requirement, propulsion power cable losses, capital costs, operating costs, propulsion system weight, and load carrying capacity of the ship. In this study, a ferry is chosen to compare the two grid architectures. To establish the required background knowledge for the reader of this thesis, the literature on the current emission regulations, the different propulsion systems, and the differences in AC and DC grids are presented. The ship’s propulsion and auxiliary power demand are not freely available and are in the possession of the ship operator. Therefore, first, a preliminary methodology was developed for estimating the ship’s mechanical power requirements. Second, the ship’s electrical power requirements are estimated from the understanding of the literature. The cable power losses are also calculated for the AC and BiDC grid topology. Third, the diesel generator model was developed from the data points of a marine diesel generator for the AC and BiDC grid operation, i.e., the fixed speed and variable speed operation. Finally, an optimization problem was formulated for all the ten arrangements for minimising the CO2 emissions over the complete operational profile of the ship. Overall, it was observed that the minimum emissions achieved by BiDC grids, when compared with AC grids for all the arrangements, the emissions from the former were lower. Furthermore, these results depend on the operating profile of the ship, the shore infrastructure, the diesel generator and battery configuration and their technical parameters. However, these findings demonstrate the possible potential of BiDC grids in emission reduction from the shipping sector.

The transportation industry is causing 14% of the worldwide greenhouse gas emission. Therefore, the United Nation concluded with the Paris climate agreement to reduce and limit their emissions to keep the global average temperature increase below 2 degrees Celsius. Based on the agreement the European union introduced new regulations to limit the average fleet emission of car companies. In this push towards lowering emission the companies introduced their first generations of electric cars. To further improve the efficiency of the electric drive train new multilevel topologies were introduced. One of the topologies is called modular multilevel converter (MMC) introduced by R. Marquardt and A. Llesnicar in 2003. This new topology main advantage are its modularity and the option to use low voltage component. However, no company industrialized the MMC for drive train application. The reason therefore are the extensive control architecture, hardware and software wise. This thesis investigated possible ways to reduce the wiring and complexity by introducing a low level communication bus together with distributing the control to remove the centralized architecture. Therefore, the different possible low level communication bus were analysed and compared. The different bus protocols were compared based on speed and time to send the same amount of information to control a MMC. It was concluded that the serial peripheral interface bus (SPI) shows the highest capability for the proposed single phase 5 level converter set-up. Therefore, an experimental system was built to validate the performance. The system itself was designed with the goal to use low cost and low voltage component. The validation of the experimental set-up showed the stable operation of the system with an open loop control. Thereby it proofs the possibility to integrate and control the MMC with a low level communication bus. The results can be used as a baseline to further research on integrating theMMC and make it viable for drive train applications.

A large contribution to the total share of electricity generated in European power grid will come from renewable sources of energy in the near future due to European initiative to become carbon neutral. RES are connected to the grid with PE devices, which if not modelled correctly provide lower level of system stability and security of supply. The existing power grid with mainly synchronous generators will not be suited to operate in the future, when synchronous machines will become less important sources of energy. An increase in dynamic behaviour of the system could cause significant challenges for the existing system, which calls for new monitoring and control strategies. The aim of the project is twofold; firstly, to enhance system stability by deploying WAMS in power system with a massive share of RES to total electricity generation. Secondly, it focuses on developing and proposing a tool which will improve consultancy in future power grids. A tool developed is Next Generation Grid Operations (NextGen GridOps) Knowledge Framework which is conceptually designed by DNV. The effectiveness of WAMS applications on system stability improvements and damping enhancements will be evaluated by studying rotor angle stability as well as effect of WAMS on damping of electromechanical oscillations. The response to a disturbance of the remaining synchronous generators will be studied to evaluate the effect of different types of control schemes (grid-following, grid forming control) on the rotor angle stability. Rotor angle stability will be examined to show whether different control structures and WAMS will show enhancements of the overall stability through time domain simulations. WAMS structure in this project consists of PMUs as well as WADCs. While PMUs are sensors deployed in the system to provide synchrophasor measurement, WADCs are damping controllers deployed with an intent of enhancing damping in the system. This project build upon findings from Horizon 2020 MIGRATE Project. The effectiveness of grid-following control and grid-forming control on stabilizing the grid with massive penetration of PE devices are conducted to set the base case for evaluating the effect of WAMS. Modelling software used in the project is DIgSILENT PowerFactory 2021 SP1 and the PowerFactory Thesis Licence was provided by DIgSILENT GmbH for research and educational purposes. Based on the off-line numerical simulations conducted in IEEE 39 Bus New England test system it was found that WAMS functionality with corresponding PMUs and WADCs can decrease oscillations in the system. It has been verified that grid-following control enables 60% of RES penetration and grid-forming control enables penetration of RES above 80%. There have been two grid-forming controllers used in the system, where DVC is able to receive the stabilizing signal while VSM grid-forming controller has a supporting role. WAMS and corresponding WADCs deployed on DVCs are able to enhance damping of the low-frequency modes with frequencies below 2.0 Hz, which is supported by time domain simulations and by conducting Prony analysis. Eigenvalue analysis results for some cases with WAMS deployed show no additional enhancements, which is a consequence of newly introduced controllers and interactions among them and existing controllers. The practical implications of this Master's Thesis study have been modelled in the NextGen GridOps Framework with an intent to make a step towards real world implementation of the findings developed during the project. Framework modelling focused on implementing client maturity classification of WAMS deployments, contributing towards development of WAMS roadmaps and further deployment of WAMS solutions for grid operators as part of the DNV Next Generation Grid Operations advisory services. Work done and information implemented will be valuable for DNV while solving the complex process of future grid operations and at the same time bringing newly developed knowledge into practice. The framework development part of the project ties in with scientific contribution by allowing newly developed information to be further explored. Effectiveness of WAMS and WADCs on improving selective damping and consequently enhancing system stability has been identified in this project through use of DVCs. It has been proven that VSM control has a better stabilizing effect and would allow even further enhancement of damping critical oscillation modes. Higher damping in the system increases the stability and consequently higher security of energy supply.