Journal
IET RENEWABLE POWER GENERATION
Volume 12, Issue 14, Pages 1659-1667Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-rpg.2018.5196
Keywords
distributed power generation; power generation control; optimisation; solar power stations; photovoltaic power systems; frequency control; biofuel; diesel-electric generators; three-term control; expeditious frequency control; solar photovoltaic based isolated renewable microgrid; biogas based isolated renewable microgrid; biodiesel generator based isolated renewable microgrid; grasshopper optimisation algorithm; approximate mathematical model; community based renewable microgrid; battery storage; load demand; load frequency studies; renewable source availabilities; load variations; controller gain optimisation; GOA; MATLAB-Simulink; proportional-integral-derivative; source variations; step load perturbation; frequency responses
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This work endeavours to propose an approximate mathematical model of a community based renewable microgrid with solar photovoltaic, biogas and biodiesel generators including battery storage for load frequency studies. It becomes a great challenge to coordinate between generation and load demand of the microgrid as the renewable sources are highly unpredictable and nature dependent. To overcome this issue, the responses of the system are studied under different real-world scenarios of renewable source availabilities and load variations with a maiden approach towards optimising the controller gains using a recent grasshopper optimisation algorithm (GOA) for efficient frequency control. The frequency responses of proposed microgrid are compared with different conventional controllers and some popular optimisation algorithms using MATLAB/Simulink. Finally, proportional-integral-derivative controller with GOA is preferred for the case studies under four cases of source variations with step load perturbation and one case of simultaneous source and load variations. The results of all these five scenarios are found satisfactory in terms of frequency responses and reported in the work.
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