摘要
为抑制直流输电系统逆变器换相失败的发生,可采用直流电流预测控制方法,但直流电流预测设定值计算公式中参数k存在一定的随机性,为此采用模糊控制器控制直流电流预测设定值,并提出直流电流模糊预测控制策略。设置了控制时长T,并通过仿真测试选取合适的T值,克服了原有方法引起的系统电流恢复缓慢的不足。最后通过CIGRE HVDC标准模型的PSCAD-Matlab联合调用仿真进行算例分析,结果验证了所提方法的有效性。
DC-current predictive control strategy is an existing advanced method to restrain inverter commutation failure in HVDC system. To break limitation of this method that parameter k in computational formula is random, a DC current fuzzy predictive control based strategy is proposed. It uses fuzzy controller to control preset DC current value on inverter side. This paper also sets control duration T chosen through simulation testing. It overcomes drawback of existing method that the current recovers slowly. Finally, effectiveness of the proposed strategy for improving capability of HVDC system in resisting commutation failure and accelerating recovery after faults is verified with simulation with standard CIGRE HVDC benchmark testing model based on combined simulation of PSCAD and Matlab.
出处
《电网技术》
EI
CSCD
北大核心
2015年第9期2498-2504,共7页
Power System Technology
基金
国家自然科学基金资助项目(51277052
51107032
61104045)~~
关键词
高压直流输电系统
换相失败
直流电流控制
模糊控制
预测控制
控制时长
HVDC power transmission systems
commutation failure
direct current control
fuzzy control
predictive control
control duration
