Approximation of system components for pump scheduling optimisation

Journal article (2015)

Authors

Ruben Menke Imperial College London
E. Abraham Imperial College London
Panos Parpas Imperial College London
Ivan Stoianov Imperial College London
Affiliation
External organisation
Optimisation Branch and bound Pump control
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Published Date

2015

Language

English

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Affiliation

External organisation

Abstract

The operation of pump systems in water distribution systems (WDS) is commonly the most expensive task for utilities with up to 70% of the operating cost of a pump system attributed to electricity consumption. Optimisation of pump scheduling could save 10-20% by improving efficiency or shifting consumption to periods with low tariffs. Due to the complexity of the optimal control problem, heuristic methods which cannot guarantee optimality are often applied. To facilitate the use of mathematical optimisation this paper investigates formulations of WDS components. We show that linear approximations outperform non-linear approximations, while maintaining comparable levels of accuracy.