弱不平衡网络下电源变流器的正、负序控制

D. Siemaszko
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引用次数: 11

摘要

在与电网连接的交/直流变换器的应用领域中,直流链路电压控制器补偿相电压不平衡引起的二次谐波分量的速度通常太慢。假设对网络电压的不平衡进行准确描述,即在正、负序同步参考系中进行精确分解,产生的电流也解耦成两部分分别控制。为了适当地消除来自网络的电力的振荡,在计算四个电流参考值时考虑了电压的不平衡。结果表明,直流链路电压不存在二次谐波分量,能够在电压不平衡的弱电网中运行。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Positive and negative sequence control for power converters under weak unbalanced networks
In the application field of AC/DC converters connected to utility networks, the DC-link voltage controller is generally too slow to compensate the second harmonic component caused by the unbalance of the phase voltages. Assuming the accurate description of the unbalance in the network voltages, namely by the accurate decomposition in the positive and negative sequence synchronous reference frame, the generated currents are also decoupled into two parts and separately controlled. For the proper cancellation of the oscillation in the power taken from the network, the unbalance in the voltages is taken into account in the calculation of the four current references. Results show that the DC-link voltage show no second harmonic component and is able to operate with weak networks under voltage unbalance.
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