电力系统自动化2018，Vol.42Issue(9)：108-113,194,7.DOI:10.7500/AEPS20180204005
基于动态电压补偿的VSG电流平衡及峰值电流控制
Current Balance and Peak Current Control of Virtual Synchronous Generator Based on Dynamic Voltage Compensation
摘要
Abstract
Virtual synchronous generator(VSG)can achieve friendly power grid integration of new renewable energy resource. However,traditional VSG technique is mainly applied in the voltage balanced situation,which leads to the unbalanced current output and overcurrent of VSG in the voltage unbalanced situation.A balanced current control strategy of VSG is therefore proposed based on the dynamic voltage compensation.By suppressing negative sequence current and controlling peak current, the corresponding compensating voltage is generated,which guarantees that the current of VSG is balanced in the unbalanced grid,the transient impact at the moment of voltage dip is suppressed,and the stable peak current is limited.Simultaneously, the proposed control strategy does not change the voltage source property of VSG,which retains the voltage support ability of VSG.Finally,the test simulation results under different operating conditions verify the correctness and effectiveness of the proposed control strategy.关键词
虚拟同步发电机/电网电压不平衡/动态电压补偿/平衡电流控制/峰值电流抑制Key words
virtual synchronous generator(VSG)/unbalanced grid voltage/dynamic voltage compensation/balanced current control/peak current suppressing引用本文复制引用
郭岩,郑天文,司杨,陈来军,梅生伟..基于动态电压补偿的VSG电流平衡及峰值电流控制[J].电力系统自动化,2018,42(9):108-113,194,7.基金项目
国家自然科学基金创新研究群体项目(51621025) （51621025）
国家自然科学基金地区科学基金项目(51567021) （51567021）
国家电网公司总部科技项目(52010118000N).This work is supported by National Natural Science Foundation of China(No.51621065,No.51567021)and State Grid Corporation of China(No.52010118000N). （52010118000N）
