Abstract
This paper studied the distributed optimal frequency regulation for multiple power generations in an isolated microgrid under limited communication resource. The event-triggered mechanism is introduced in the construction of the regulation algorithm. Each power generation in the microgrid only transmits its own information to its neighbors through a communication network when the event-triggered condition is satisfied, and the communication burden can be reduced significantly. Moreover, Zeno behavior is excluded to make the event-triggered regulation algorithm reasonable and realistic for practical microgrids. The proposed regulation method can restore the frequency and retain the economic efficiency simultaneously when some disturbances occur in isolated microgrids. The experimental result shows the effectiveness of the theoretical method.
Highlights
Due to the issues of global warming and environmental pollution caused by traditional fossil fuels, renewable energy resources have gained more attention because of their advantages of cleanliness, renewability and availability as shown in Reference [1]
This paper aims to introduce an event-triggered mechanism into the construction of distributed optimal frequency regulation for multiple power generations in an isolated microgrid
The effectiveness of distributed optimal frequency regulation (22) and(23) with event-triggered condition (42) is experimentally verified on a test microgrid containing 4 power generation inverters in a HIL system presented in Figure 3, where the red dashed arrow lines denote the edges in communication network G c
Summary
Due to the issues of global warming and environmental pollution caused by traditional fossil fuels, renewable energy resources have gained more attention because of their advantages of cleanliness, renewability and availability as shown in Reference [1]. As mentioned in Reference [2], distributed power generations, such as solar photovoltaic and wind energy generations, are commonly dependent on meteorological factors, which makes the unpredictability and volatility in their power generation This leads to the introduction of the microgrid, which is a localized power system comprised of loads, storage devices and distributed power generations accessed though inverters. Due to the rapidity and randomness of the power production of distributed power generation, the conventional economic dispatch based on accurate prediction is inappropriate. To address this issue, some research has considered dynamic optimal frequency regulation which can restore the frequency
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