低压电网三相不平衡负载非线性动态控制系统设计  

Design of three-phase unbalanced load nonlinear dynamic control system for low voltage power grid

作　　者：梁戟 LIANG Ji(Liupanshui Power Supply Bureau of Guizhou Power Grid Limited Company,Liupanshui 553400,China)

机构地区：[1]贵州电网有限责任公司六盘水供电局

出　　处：《电子设计工程》2019年第21期18-22,共5页Electronic Design Engineering

基　　金：贵州省自然科学基金项目(黔科合J字[2012]2158)

摘　　要：为控制由电容补偿造成的电网损耗行为,设计一种新型的低压电网三相不平衡负载非线性动态控制系统。利用非线性投切电路的连接特性,调节电网负载数据存储器与低压电网控制器的分组控制状态,完成新型系统的硬件运行环境搭建。在此基础上,选取定向的电网控制性能指标,在保持不平衡负载非线性阻抗能力的前提下,对低压电网的控制矢量进行静态调制,完成新型系统的软件运行环境搭建,结合相关硬件执行设备,实现低压电网三相不平衡负载非线性动态控制系统的顺利运行。与常规SVPWM系统相比,应用新型非线性动态控制系统后,单位时间内的电容补偿量不超过7.5×10^13 T,高、低电容数值间的物理落差低至2.0×10^13 T,由电容补偿造成的电网损耗行为得到有效控制。A novel three-phase unbalanced load non-linear dynamic control system for low-voltage power grid is designed to control the loss behavior caused by capacitance compensation.By utilizing the connection characteristics of the non-linear switching circuit,the grouping control state of the load data memory and the low-voltage grid controller is adjusted,and the hardware operation environment of the new system is built.On this basis,the directional control performance indicators are selected.On the premise of maintaining the non-linear impedance capability of unbalanced load,the control vector of the low-voltage power grid is static modulated,and the software operating environment of the new system is built.Combined with the relevant hardware execution equipment,the smooth operation of the threephase unbalanced load non-linear dynamic control system of the low-voltage power grid is realized.Compared with the conventional SVPWM system,the new type of non-linear dynamic control system can effectively control the loss behavior of power grid caused by capacitance compensation,which can not exceed 7.5×1013 T per unit time,and the physical difference between high and low capacitance values is as low as 2.0×1013 T.

关 键 词：低压电网 不平衡负载 非线性控制 投切电路 数据存储器 性能指标 负载阻抗 矢量调制 

分 类 号：TN946[电子电信—信号与信息处理]