改善电压质量的逆变型微源串并联入网研究

针对带高渗透分布式发电的配电网电压质量问题,提出通过逆变型微源注入功率来调整配电网电压.比较分析了配电网存在不同电压质量问题时,逆变型微源系统在并联入网和串联入网两种方式下的功率需求；分别仿真与实验研究了采用对称分量法控制策略的逆变型微源并联入网方式和采用基于d-q变换的电压电流双闭环控制策略的逆变型微源串联入网方式,...

Series and Parallel Connection Research on Inverter-based Micro-source of Improving Voltage Quality

According to the voltage quality of the distribution network with high penetration of distributed generation,this paper provides a method to regulate distribution network voltage by injecting power with inverter-based micro-source.Under the circumstance of distribution network existing different voltage quality problems,the paper comparative-ly analyzes the power requirement in the mode of parallel connection and series connection between the inverter-based micro-source and the grid.It respectively realizes the simulation and experimental study on the parallel connection mode using the control strategy of symmetrical component method and the series connection mode using the control strategy of voltage and current closed loop based on d-q transform.All the analysis results indicate that the voltage quality can be improved by both modes to some extent.Moreover,the power requirement can be reduced and the better control effect is achieved by selecting proper mode according to different voltage quality problem of distribution network.