基于复功率的电网电压不平衡条件下并网逆变器控制策略

发布时间：2018-05-20 23:43

本文选题：并网逆变器 + 电网电压不平衡　；参考：《电工技术学报》2017年08期

【摘要】：针对电网电压不平衡条件下并网逆变器故障穿越问题,提出一种基于复功率静止坐标系并网逆变器控制策略,与传统旋转坐标系控制策略不同,本文提出的方法通过合并有功、无功功率脉动分量控制6个变量。利用两个调节系数将控制目标组合后实现具有限流功能的协调控制,不仅保证了电网电压不平衡情况下并网逆变器输出有功、无功功率连续调节,同时并网电流峰值维持在额定电流范围内,提高了系统可靠性。最后通过实验验证了提出方案的有效性。
[Abstract]:Aiming at the problem of fault crossing of grid-connected inverter under unbalanced voltage, a control strategy of grid-connected inverter based on complex power static coordinate system is proposed, which is different from the traditional control strategy of rotating coordinate system. Reactive power pulsation component controls 6 variables. The coordinated control with finite current function is realized by combining the control targets with two regulating coefficients, which not only ensures the output active power and reactive power continuous regulation of grid-connected inverter under the condition of unbalanced grid voltage, but also realizes the coordinated control with finite current function. At the same time, the peak value of grid-connected current is maintained in the range of rated current, which improves the reliability of the system. Finally, the effectiveness of the proposed scheme is verified by experiments.
【作者单位】：燕山大学电力电子节能与传动控制河北省重点实验室;
【基金】：国家自然科学基金(51477148) 中国博士后科学基金(2015T80230) 河北省引进留学人员(CL201622)资助项目
【分类号】：TM464

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