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专利标题:
一种微网群分布式电压不平衡补偿方法
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- 专利标题(英):Distributed voltage unbalance compensation method for micro grid groups
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申请号:CN201910198753.0
申请日:2019-03-15
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公开(公告)号:CN109842120A
公开(公告)日:2019-06-04
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发明人:
王灿
, 梅世颐
, 余宏亮
, 陈思睿
, 程杉
, 杨楠
, 刘颂凯
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申请人:
三峡大学
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申请人地址:
湖北省宜昌市西陵区大学路8号
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专利权人:
三峡大学
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当前专利权人:
三峡大学
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当前专利权人地址:
湖北省宜昌市西陵区大学路8号
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代理机构:
宜昌市三峡专利事务所
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代理人:
吴思高
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主分类号:
H02J3/12
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IPC分类号:
H02J3/12
; H02J3/26
; H02J3/38
摘要:
一种微网群分布式电压不平衡补偿方法,首先将公共耦合点的电压vabc通过派克变换转化为dq旋转坐标系下的电压vd,vq,然后,使用低通滤波器LPF提取公共耦合点电压在旋转dq坐标系下的正、负序分量 并将信号传输到二级控制器,计算电压不平衡度VUF。随后将电压不平衡度VUF的计算值与电压不平衡度参考值VUF*比较的误差作为比例积分PI控制器的输入信号,最后将其输出信号与公共耦合点的电压负序量 相乘,把生成的不平衡补偿参考值UCRdq传输到初级控制。该方法在补偿公共耦合点电压不平衡方面具有明显效果,且在应对电源输出功率波动和负荷突变时表现出了较强的鲁棒性。
摘要(英):
A distributed voltage unbalance compensation method for micro grid groups comprises the following steps: converting the voltage v of a common coupling point into voltages v and v in a rotating d-q coordinate system through Park transformation, and using a low-pass filter LPF to extract the positive and negative sequence components v<+> and v<-> of the voltage of the common coupling point in the rotating d-q coordinate system; transmitting signals to a secondary controller, and calculating the voltage unbalance VUF; taking the error of comparison between the calculated valueVUF of voltage unbalance and the reference value VUF* of voltage unbalance as the input signal of a proportional-integral PI controller; and finally, multiplying the output signal by the negative sequence component v<-> of the voltage of the common coupling point, and transmitting a generated unbalance compensation reference value UCR to a primary controller. The method has an obvious effect in compensation of voltage unbalance of the common coupling point, and shows strong robustness in dealing with output power fluctuation and load sudden change of a power supply.