电力系统自动化2017，Vol.41Issue(8)：22-29,8.DOI:10.7500/AEPS20160921001
连接弱交流系统的高压直流换流站无功补偿协调控制策略
Coordinated Control Strategy of Reactive Compensation for HVDC Converter Station Connected to Weak AC System
摘要
Abstract
Coordinated control of reactive power compensation is essential to the stability of bus voltage in high voltage direct current (HVDC) connected to weak AC system and characterized with frequent power fluctuation.Based on the coordination of the static synchronous compensator and fixed capacitors, a multi-mode control strategy is proposed, including the steady-state voltage regulation mode, the automatic voltage control (AVC) mode and the transient control mode.In the steady voltage regulation mode, the converter bus voltage can be controlled at its rated value with zero steady-state error by the coordinated control of the static synchronous compensator (STATCOM) and capacitor bank, while the reactive component devices of the HVDC converter will participate in the voltage regulation of nearby power grid in the AVC mode, and the transient control mode is created for mitigating voltage fluctuation and reducing the probability of commutation failure during grid fault period.Besides, according to the actual parameters of the ±800 kV DC power transmission project from Jiuquan to Hunan, a model is established.Then, different working conditions, such as DC power fluctuation, operation complying with the AVC commands and short-circuit accident are carried out.The correctness and effectiveness of the proposed control strategy are verified by the simulation results.关键词
直流输电/弱交流系统/功率波动/多模式控制策略Key words
direct current transmission/weak AC system/power fluctuation/multi-mode control strategy引用本文复制引用
丁立国,沈阳武,许加柱,呙虎,李世军,张斌..连接弱交流系统的高压直流换流站无功补偿协调控制策略[J].电力系统自动化,2017,41(8):22-29,8.基金项目
国家自然科学基金资助项目(51477044) （51477044）
国家电网公司科技项目(5216A015001S).This work is supported by National Natural Science Foundation of China (No.51477044) and State Grid Corporation of China (No.5216A015001S). （5216A015001S）
