基于托里拆利点的柔性互联装置直流电压波动抑制策略  

DC Voltage Fluctuation Suppression Strategy of Flexible Interconnected Device Based on Torricelli Point

作　　者：周琦 王晨清 孔祥平 ZHOU Qi;WANG Chenqing;KONG Xiangping(State Grid Jiangsu Electric Power Company Ltd.Electric Power Research Institute,Nanjing 211103,Jiangsu,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《电气传动》2024年第4期27-33,共7页Electric Drive

基　　金：国家电网有限公司科技项目(5400-202255160A-1-1-ZN)。

摘　　要：针对柔性互联装置交流电网三相不平衡引发直流侧电压波动的问题,提出一种基于托里拆利点的柔性互联装置直流电压波动抑制策略。首先,通过定义三相不平衡不对称故障系统电压三角形托里拆利点为“新中性点”,将传统三相坐标系下的电压幅值不对称、相角漂移的故障转化为托里拆利点坐标系下的电压幅值故障;其次,通过分析系统三相功率有功功率振荡、直流波动之间的关系,建立新型控制策略,通过抑制有功功率二倍频分量波动,有效抑制系统直流母线电压波动。最后,基于Matlab/Simulink搭建仿真模型,验证了所提方法的正确性。Considering that the problem of voltage fluctuations on the DC side caused by the three-phase imbalance of the AC grid of the flexible interconnection device,a DC voltage fluctuation suppression strategy for flexible interconnection device based on the Torricelli point was proposed.Firstly,by defining the Torricelli point of the triangle formed by the voltage vector in the three-phase unbalanced fault system as the"new neutral point",the voltage amplitude asymmetry and phase angle drift faults in the traditional three-phase coordinate system were transformed into voltage amplitude faults in the Torricelli point coordinate system;secondly,the relationship between the active power oscillation of the three-phase power system and DC fluctuations was analyzed,a new control strategy was established to suppress the voltage fluctuations of the DC bus voltage by suppressing the fluctuation of double frequency component of active power effectively.Finally,the proposed method was proved to be effective by the Matlab/Simulink simulation model.

关 键 词：托里拆利点 柔性互联 不对称故障 电压波动 

分 类 号：TM28[一般工业技术—材料科学与工程]