Abstract
The energy storage power station (ESPS) is one of the most used energy storage system (ESS). It can also be used to regulate the reactive power thus maintaining the micro-grid side voltage so no more static var generator needed. However, it requires a higher level controller to achieve that called coordinate control. The coordinate controller decides how much reactive power the ESPS should generate based on the voltage drop at the micro-grid side. And the reference reactive power signal is sent to the controller through a certain communication protocol, IEC61850-Generic Object-Oriented Substation Event (GOOSE) for example. The communication delay in such a protocol is ineligible. Such communication delay can seriously affect the performance of the reactive power control. To overcome this, Smith Predictor (SM) based delay compensation control is proposed and analyzed. Control hardware-in-the-loop results are presented to verify the effectiveness of the proposed method.
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