并网型光伏电站无功电压控制

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Abstract

Grid-connected PV plants should have independent control of reactive power to support the grid. The equivalent aggregation model of large-scale photovoltaic (PV) plants is established firstly. With the existence of the line and transformer impedance, the grid voltage stability is reduced caused without the reactive power compensation device in PV plants and reactive power of the inverter. The three-level reactive power control strategy is proposed based on the cooperated control between the reactive power compensation device and the inverter. The strategy coordinates the reactive power output among the reactive power compensation devices, PV generation unit and inverters, which regulates the voltage very effectively. Then the grid active and reactive power losses can be minimized while maintaining the voltage in the required range. In order to ensure the stable operation of the grid, the PV array carries out lower power operation strategy when the reactive power output of PV plants is fixed. Moreover, the validity and the effectiveness of the method are validated by means of simulation results.

Key words： PV plants grid-connected inverter reactive power compensation sensitivity voltage control

Received: 10 September 2013 Published: 30 October 2015

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TM464

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	Articles by authors
	Zhou Lin
	Ren Wei
	Liao Bo
	Chao Yang
	Shao Nianbin
	Du Xiao

Cite this article:

Zhou Lin,Ren Wei,Liao Bo等. Reactive Power and Voltage Control for Grid-Connected PV Power Plants[J]. Transactions of China Electrotechnical Society, 2015, 30(20): 168-175.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I20/168

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