区域互联下不对称交流电网运行控制系统设计  

Design of operation control system for asymmetric AC power grid under regional interconnection

作　　者：王宜立 张蓉馨 杨再鹤 单祖植 徐晓亮[3] WANG Yili;ZHANG Rongxin;YANG Zaihe;SHAN Zuzhi;XU Xiaoliang(Dispatching Section of Yunnan Electric Power Dispatching Control Center,Kunming 650011,China;Wenshan Power Supply Bureau Power Dispatching Control Center,Wenshan 663099,China;Nanjing Nanrui Jibao Electric Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]云南电力调度控制中心调度科,云南昆明650011 [2]文山供电局电力调度控制中心,云南文山663099 [3]南京南瑞继保电气有限公司,江苏南京210000

出　　处：《电子设计工程》2024年第1期86-90,共5页Electronic Design Engineering

摘　　要：电力系统内部的交流电在产生不对称故障之后,会直接导致换流站母线电压不平衡,系统内部出现的负序分量和零序分量会影响系统交流和直流谐波分布,进而影响电网的正常运行。为了进一步实现不对称交流电网的控制,设计了一种控制系统。系统硬件设计了锁相环控制器、电流环控制器、DSP控制器,锁相环控制器由相位鉴别、环路滤波和压控振荡三部分组成一个闭环。针对区域互联状况进行分析,确定谐波电压和谐波电流的传递规律,建立谐波分析程序和控制程序,通过矢量计算,对不对称交流电网电流进行运行控制。实验结果表明,所设计系统能够有效解决运行过程的输入量和输出量不均衡的问题,降低叠加放大状况,控制后电流和电压幅值波动为0,有效防止出现谐波不稳定现象。After the asymmetric fault of AC in the power system,it will directly lead to the imbalance of bus voltage in the converter station.The negative sequence component and zero sequence component in the system will affect the distribution of AC and DC harmonics,and then affect the normal operation of the power grid.In order to further experiment the control of asymmetric AC power grid,a control system is designed.The hardware of the system is designed with PLL controller,current loop controller and DSP controller.The PLL controller consists of three parts:phase identification,loop filtering and voltage controlled oscillation.Analyze the regional interconnection status,determine the transmission law of harmonic voltage and harmonic current,establish harmonic analysis program and control program,and control the current of asymmetric AC power grid through vector calculation.The experimental results show that the designed system can effectively solve the problem of unbalanced input and output during operation,reduce the superposition amplification condition,control the amplitude fluctuation of current and voltage to 0,and effectively prevent the phenomenon of harmonic instability.

关 键 词：区域互联 不对称交流电网 运行控制 控制系统 

分 类 号：TN72[电子电信—电路与系统]