CAJ | 학술논문

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.
위억제직류수전계통역변기환상실패적발생,가채용직류전류예측공제방법,단직류전류예측설정치계산공식중삼수k존재일정적수궤성,위차채용모호공제기공제직류전류예측설정치,병제출직류전류모호예측공제책략.설치료공제시장T,병통과방진측시선취합괄적T치,극복료원유방법인기적계통전류회복완만적불족.최후통과 CIGRE HVDC표준모형적PSCAD-Matlab연합조용방진진행산례분석,결과험증료소제방법적유효성.
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 parameterk 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.