电力系统自动化2017，Vol.41Issue(10)：51-57,7.DOI:10.7500/AEPS20160727013
多端电压源型直流互联系统频率稳定性控制策略
Frequency Stability Control Strategy for Voltage Source Converter Based Multi-terminal Direct Current Interconnected System
摘要
Abstract
A multiport coordinated control strategy is proposed for multi-island grid converter station to participate in the main grid frequency stability regulation to heighten the frequency stability of voltage source converter based multi-terminal direct current (VSC-MTDC) system.According to the mathematical model of the interconnected system, this strategy has to design a control law for the direct current (DC) power regulatory amount of each island grid converter using the feedback linearization H∞ method in nonlinear robust control.Secondly, in consideration of the frequency fluctuations of each island grid, this strategy uses the simplex method to optimize the DC power distribution coefficient for the control rate of DC power adjustment amount, thereby obtaining the DC power adjustment amount of optimal allocation and ensuring coordinated participation by all island grids in the main grid frequency stability adjustment process with optimal DC voltage droop control.Finally, a three-terminal VSC-MTDC system is set up on PSCAD/EMTDC.Comparison of simulation results with those of conventional control strategy shows the correctness and superiority of the proposed control strategy.关键词
电压源型换流器/多端直流互联系统/频率调节/反馈线性化H∞方法/单纯形法/直流功率分配系数/最优直流电压斜率控制Key words
voltage source converter (VSC)/multi-terminal direct current interconnected system/frequency regulation/feedback linearization H∞ method/simplex method/direct current power distribution coefficient/optimal direct current voltage droop control引用本文复制引用
胡益,王晓茹,滕予非,韩润..多端电压源型直流互联系统频率稳定性控制策略[J].电力系统自动化,2017,41(10):51-57,7.基金项目
中国博士后科学基金资助项目(2015M582543).This work is supported by Post-doctoral Science Foundation of China (No.2015M582543). （2015M582543）
