为了克服现有的电力电子变压器能量转换效率低,传输容量小等缺点,提出一种适用于10 k V配电网的混合式电力电子变压器。在所提出的拓扑基础上,推导数学模型并设计合适的控制器、控制策略,可以实现电网无功治理、动态电压跌落恢复、一次...为了克服现有的电力电子变压器能量转换效率低,传输容量小等缺点,提出一种适用于10 k V配电网的混合式电力电子变压器。在所提出的拓扑基础上,推导数学模型并设计合适的控制器、控制策略,可以实现电网无功治理、动态电压跌落恢复、一次侧电压故障容错运行等功能。基于MATLAB/Simulink的仿真,验证了所提出的拓扑、数学模型、控制方法的正确性和有效性。展开更多
The purpose of this study is to solve the main problems in distribution networks,including increased line loss and reduced power supply quality caused by insufficient capacitive reactive power.To reduce the capacity,v...The purpose of this study is to solve the main problems in distribution networks,including increased line loss and reduced power supply quality caused by insufficient capacitive reactive power.To reduce the capacity,voltage,and current stress of an active module of a compensation device and improve the cost performance of the device,an improved hybrid reactive power compensation system based on a fixed capacitor(FC)and a static synchronous compensator(STATCOM)is proposed.The topological structure and basic operating principle of the proposed reactive power compensation system are introduced.In addition,from the perspectives of output voltage,current,power,loss of the active part,and system compensation cost,the performances of the proposed reactive compensator and the inductively coupled STATCOM(L-STATCOM)are compared and analyzed.Furthermore,the key parameters of the proposed system are designed,and the joint optimization control strategy of the FC and STATCOM is studied.The correctness and effectiveness of the proposed topology structure and control method are verified by simulations.展开更多
文摘为了克服现有的电力电子变压器能量转换效率低,传输容量小等缺点,提出一种适用于10 k V配电网的混合式电力电子变压器。在所提出的拓扑基础上,推导数学模型并设计合适的控制器、控制策略,可以实现电网无功治理、动态电压跌落恢复、一次侧电压故障容错运行等功能。基于MATLAB/Simulink的仿真,验证了所提出的拓扑、数学模型、控制方法的正确性和有效性。
基金Supported by the General Project of Hunan Natural Science Foundation(2021JJ30715)the Scientific Research Fund of Hunan Provincial Education Department(20B029)the Graduate Research Innovation Project of Changsha University of Science&Technology(CX2021SS52).
文摘The purpose of this study is to solve the main problems in distribution networks,including increased line loss and reduced power supply quality caused by insufficient capacitive reactive power.To reduce the capacity,voltage,and current stress of an active module of a compensation device and improve the cost performance of the device,an improved hybrid reactive power compensation system based on a fixed capacitor(FC)and a static synchronous compensator(STATCOM)is proposed.The topological structure and basic operating principle of the proposed reactive power compensation system are introduced.In addition,from the perspectives of output voltage,current,power,loss of the active part,and system compensation cost,the performances of the proposed reactive compensator and the inductively coupled STATCOM(L-STATCOM)are compared and analyzed.Furthermore,the key parameters of the proposed system are designed,and the joint optimization control strategy of the FC and STATCOM is studied.The correctness and effectiveness of the proposed topology structure and control method are verified by simulations.
