论文部分内容阅读
快速、准确地检测补偿指令电流是提高配电网静止同步补偿器(distribution static synchronous compensator,DSTATCOM)补偿性能的重要环节。在总结现有补偿指令电流检测方法的基础上提出一种新型检测方法。该方法利用基波正序电压提取模块检测出基波正序电压,之后对三相电流进行正余弦变换得到基波正序有功电流,与三相电流相减得到补偿指令电流。检测结果不受电网电压不对称和畸变的影响,无需利用锁相环电路获得同步旋转角,消除了由此带来的延时和误差,减少了硬件成本。仿真和样机实验结果验证了该方法的可行性。
The rapid and accurate detection of compensating command current is an important step to improve the compensation performance of distribution static synchronous compensator (DSTATCOM). A new type of detection method is proposed based on summarizing current detection methods of compensation commands. In this method, fundamental fundamental positive sequence voltage is detected by the fundamental positive sequence voltage extraction module, and then the positive sequence cosine transform of the three-phase current is performed to obtain the fundamental positive sequence active current, which is subtracted from the three-phase current to obtain the compensation command current. The test result is not influenced by the voltage asymmetry and distortion of the power grid. It is not necessary to use the phase-locked loop circuit to obtain the synchronous rotation angle, thereby eliminating the delay and error caused thereby and reducing the hardware cost. Simulation and experimental results verify the feasibility of this method.