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电网技术  2006 

动态电压恢复器的能量稳定控制

, PP. 14-18

Keywords: 动态电压恢复器,能量优化,电能质量,控制策略,电力系统

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Abstract:

针对动态电压恢复器(DynamicVoltageRestorer,DVR)提出了一种能量稳定控制策略,该策略综合了已有的负荷电压固定补偿,同相电压补偿和最小能量补偿三种负荷电压控制策略的优点而避免了各自的缺点,在实现DVR补偿目标的同时,优化了DVR与系统的能量交换过程,减少了所需要的设备容量并增加了有效补偿时间,提高了经济性和可靠性。采用该控制策略的DVR不需要整流充电单元也能够在发生电压跌落或电压上升后的较短时间内恢复其直流储能单元的能量,同时避免了系统电压上升时,DVR吸收能量导致直流侧过电压带来的安全威胁。最后用仿真试验验证了该控制策略的实用性和有效性。

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