一种SOP端口不平衡时直流侧电压脉动抑制策略OACSTPCD
A strategy for suppression of voltage fluctuation on DC side when SOP port is unbalanced
当柔性多状态开关(SOP)端口电压不平衡时,会引起直流侧电压的波动,给整个系统的稳定性带来很大的影响.根据SOP的数学模型,对波动的原因进行了分析,提出一种基于二阶滑模控制的直流侧电压波动抑制策略;通过引入基于非线性干扰观测器的电容补偿器装置,对参考电压电流进行精确地跟踪.考虑多种端口电压不平衡的条件,在MATLAB/Simulink中搭建SOP仿真模型,仿真结果表明,该方法对直流侧电压波动抑制有明显的效果.
When the voltage of the soft open point(SOP)port is unbalanced,it will cause the voltage fluctuation on DC side,which will greatly affect the stability of the entire system.According to the mathematical model of SOP,the cause of the fluctuation is analyzed,and a DC-side voltage suppression strategy based on second-order sliding mode control is pro-posed in this paper.The precise tracking of reference voltage and current is carried out by introducing a capacitor compen-sator device based on a nonlinear disturbance observer.Considering a variety of port voltage imbalance conditions,an SOP simulation model is built in MATLAB/Simulink.The simulation results show that the proposed method has a significant effect on the suppression of DC-side voltage fluctuations.
张国荣;汤彬;沈聪;王泰文;徐晨林;夏子鹏
合肥工业大学 电气与自动化工程学院,合肥 230009广东电网有限责任公司珠海供电局,广东 珠海 519031
动力与电气工程
柔性多状态开关端口不平衡滑模控制电容器补偿装置
SOPport imbalancesliding mode controlcapacitor compensation device
《电测与仪表》 2024 (003)
95-101 / 7
国家重点研发计划项目(2017YFB0903100);国家电网有限公司科技项目(521104170043)
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