混合微电网交流侧不对称电压引起的直流侧功率波动分析及解决措施  

Analysis of Power Fluctuation at DC Side Caused by Unbalanced AC Voltage of Hybrid Microgrid and Relative Solving Measures

作　　者：贾利虎 杜少飞 朱永强 JIA Lihu DU Shaofei ZHU Yongqiang(State Key Laboratory of Alternate Electrical Power System.with Renewable Energy Sources （North China Electric Power University）, Beijing 102206, China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《现代电力》2017年第1期50-54,共5页Modern Electric Power

摘　　要：交直流混合微电网中交流侧电压不对称会引起直流侧功率和电压波动。本文分析了交流微电网三相不平衡电压下直流侧电压和功率波动的特征,考虑了直流侧接电容、电阻以及直流微电网3种情况,分析了直流侧电压和功率中所含直流分量、工频分量以及二倍频分量的构成。其次,提出了在直流侧接入单调谐滤波器消除电压和功率工频分量的措施。PSCAD/EMTDC仿真结果表明,直流侧电压和功率中所含工频分量较大,采用单调谐滤波器能够对这种问题进行较好的处理。In the hybrid AC/DC microgrid,the unbalanced voltage at DC side will lead to the fluctuations of DC voltage and power.In this paper,the characteristic of the DC volt-age and power fluctuations when unbalanced fault occurs at AC side is analyzed,and the composition of DC component, frequency component and the double-frequency component contained in the DC voltage and power under such cases as the accessing of DC capacitor and resistor to DC side and DC micro-grid is studied.Then a measure to eliminate the volt-age and power frequency component is presented by access-ing of single-tuned filters at the DC side.In the end,the PSCAD/EMTDC simulation results show that large frequen-cy component is contained in DC voltage and power and the single-tuned filters can handle this problem effectively.

关 键 词：交直流微电网 不平衡电压 工频分量 单调谐滤波器 

分 类 号：TM464[电气工程—电器]