电力系统自动化2018，Vol.42Issue(10)：122-127,156,7.DOI:10.7500/AEPS20170605004
不对称条件下的储能虚拟同步发电机低电压穿越控制技术
A Low Voltage Ride Through Control Technique for Energy Storage Virtual Synchronous Generator Under Asymmetric Condition
何安然 1侯凯 2王小红 1蒋应伟 2刘建平 1卢方舟2
作者信息
- 1. 南瑞集团(国网电力科学研究院)有限公司,江苏省南京市211106
- 2. 智能电网保护和运行控制国家重点实验室,江苏省南京市211106
- 折叠
摘要
Abstract
The technology of virtual synchronous generator(VSG)enables the inverter to simulate the operation mechanism of synchronous generators connected to the grid,which is beneficial to improve the stability of the power system.In order to truly simulate the working characteristics of synchronous generators,it is required that the VSG must have low voltage fault crossing capability.When an asymmetrical fault occurs,there are a large number of negative sequence components in the voltage and current,which seriously affect the quality of output voltage and current.In order to solve the problem mentioned above, firstly,based on the mathematical model of the control system,the voltage feedforward nature of the three-phase voltage source inverter is analyzed in the conventional d-q rotating coordinate system,and the voltage feedforward strategy based on theα-βcoordinate system is proposed.Then,the voltage phase compensation technique is adopted to suppress the negative sequence current.Finally,through real time digital simulator model of the 5 MW energy storage VSG,single-phase and phase-to-ground fault is simulated,which verifies the correctness and effectiveness of the control algorithm.关键词
虚拟同步发电机/故障穿越/电压前馈/不平衡控制Key words
virtual synchronous generator(VSG)/low voltage ride through(LVRT)/voltage feedforward/unbalanced control引用本文复制引用
何安然,侯凯,王小红,蒋应伟,刘建平,卢方舟..不对称条件下的储能虚拟同步发电机低电压穿越控制技术[J].电力系统自动化,2018,42(10):122-127,156,7.
