access icon free Comparative performance evaluation of WCA-optimised non-integer controller employed with WPG–DSPG–PHEV based isolated two-area interconnected microgrid system

This study endeavours an effective frequency control of renewable-based isolated two-area interconnected microgrid (ICμG) without battery, incorporating wind power generation in area-1, dish-Stirling solar power generation system in area-2 and other common distributed generation systems such as diesel engine driven generator, plug-in hybrid electric vehicle, heat pump and freezer in both the areas. A recently developed heuristic optimisation technique called water cycle algorithm (WCA) is applied to optimally tune the parameters of the non-integer fractional-order proportional-integral-derivative (FOPID) controllers employed with ICμG. Application of WCA-based FOPID controllers in frequency control two-area ICμG without battery is a novel work. The comparative performance analysis of proportional-integral-derivative (PID), PID with filter and non-integer order-based FOPID controller with their gains tuned by particle swarm optimisation (PSO), improved PSO, firefly algorithm and WCA algorithms indicates the superiority of WCA-based FOPID controller's under different case studies (considering different load disturbances, wind speed variation with real data, and solar irradiance) in terms of frequency deviation, tie-line power, and objective function. Furthermore, the sensitivity analysis contemplates that WCA-optimised FOPID controller can withstand ±25% change in synchronising coefficient, +20% change in loading condition and ±25% change in frequency bias constant without resetting the gain values.

Inspec keywords: particle swarm optimisation; frequency control; control system synthesis; diesel engines; solar power stations; sensitivity analysis; wind power plants; power system interconnection; hybrid electric vehicles; three-term control; power grids; solar power; power generation control; distributed power generation

Other keywords: water cycle algorithm; comparative performance analysis; diesel engine; wind power generation; heuristic optimisation technique; WPG–DSPG–plug-in; heat pump; distributed generation systems; dish-Stirling solar power generation system; fractional-order proportional–integral–derivative controllers; WCA-optimised FOPID controller; firefly algorithm; frequency control; frequency deviation; filter; particle swarm optimisation; frequency bias; two-area interconnected microgrid system; PID; hybrid electric vehicle; tie-line power; freezer; WCA-optimised noninteger controller

Subjects: Optimisation techniques; Control system analysis and synthesis methods; Power system control; Optimisation techniques; Frequency control; Control of electric power systems; Distributed power generation

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rpg.2018.5419
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content/journals/10.1049/iet-rpg.2018.5419
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