具备不平衡电压补偿功能的台区储能装置控制策略  

Control Strategy for Energy Storage Devices in Substation Areas with Unbalanced Voltage Compensation Function

作　　者：李娟[1] 魏亚龙 张世乾 龚培娇 LI Juan;WEI Yalong;ZHANG Shiqian;GONG Peijiao(XuJi Group Co.,Ltd.,Xuchang 461000,Henan,China;Xi’an XJ Power Electronics Technology Co.,Ltd.,Xi’an 710075,Shaanxi,China)

机构地区：[1]许继集团有限公司,河南许昌461000 [2]西安许继电力电子技术有限公司,陕西西安710075

出　　处：《电气传动》2025年第3期48-53,共6页Electric Drive

摘　　要：设计了一种具备电网电压不平衡补偿功能的三相四线制储能型低电压治理装置。首先,针对台区电网末端低电压问题,设计了一种有功-电压下垂和恒定功率因数相结合的控制方法,补偿了台区电网末端电压。其次,针对电网三相电压不平衡问题,提出了一种基于负序和零序虚拟阻抗的三相不平衡电压补偿方法,直接控制负序和零序电压,省略了负载电流传感器。最后,搭建Matlab/Simulink仿真模型和50 kW中点电容式三相四线制T型三电平储能变流器实验平台,通过仿真和实验验证了所提控制方案的有效性。A three-phase four-wire energy storage type low-voltage control device with the function of grid voltage unbalance compensation was designed.Firstly,a control method based on active voltage droop and constant power factor was introduced in detail to solve the problem of low voltage at the terminal of substation area power grid,which can compensate the low voltage at the terminal of substation area power grid.Secondly,a three-phase unbalance voltage compensation method based on negative sequence and zero sequence virtual impedance was proposed,which directly controls negative sequence and zero sequence voltage and omits the application of current sensor.Finally,a Matlab/Simulink simulation model and a 50 kW mid-point capacitor three-phase four-wire T-type three-level energy storage converter experiment platform were built,and the effectiveness of the proposed control scheme was verified through simulation and experiments.

关 键 词：三相四线制 低电压治理 电网电压不平衡治理 负序和零序虚拟阻抗 

分 类 号：TM464[电气工程—电器]