Fu Yuan,Yang Xiaoxiao,Zhao Fei,et al.Voltage stability region and active support technology of renewable energy sending system[J].Electric Power Automation Equipment,2026,46(10):143-149.
Fu Yuan,Yang Xiaoxiao,Zhao Fei,et al.Voltage stability region and active support technology of renewable energy sending system[J].Electric Power Automation Equipment,2026,46(10):143-149.DOI: 10.16081/j.epae.202604016.
Voltage stability region and active support technology of renewable energy sending system
Designing active support control parameters within the voltage stability region is crucial for effectively addressing the stability challenges of renewable energy sending systems. A power flow calculation model of the renewable energy transmission system is established. The effect of key parameters such as high/low voltage ride-through(HVRT/LVRT) thresholds,grid short circuit ratio(SCR),converter capacity,and power margin on voltage stability is analyzed. By comprehensively considering the critical constraint boundaries affecting voltage stability,a characterization method for the voltage stability region of a renewable energy sending system is proposed. On this basis,considering the system structure and the active power sending level,a coordinated support control strategy for renewable energy and energy storage under multiple constraints within the voltage stability region is proposed. A photovoltaic and storage grid-connected test system is established,and the results show that the proposed control strategy provides significant support for voltage stability under various operating conditions such as renewable energy fault ride-through,sending power overlimit.
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