摘要
针对静止无功发生器(SVG)传统电流控制方式输出谐波较多、电流响应速度慢的问题,介绍了静止无功发生器的工作原理及运行特性,提出了一种基于虚拟磁链定向的直接功率控制策略(VF-DPC),以瞬时功率与给定功率的计算差值为依据,在设计中采用双滞环结构的思路对电压矢量扇区内开关表进行改进,将差值送入开关表选取矢量,并以整流器开关的模式实现了系统控制。同时运用Matlab/Simulink工具,基于TSM320LF2812D型DSP的平台,对VF-DPC的补偿方案进行了仿真调试,将实验室搭建系统应用于冶金电网。研究结果表明,基于虚拟磁链定向的直接功率控制的静止无功发生器能够缩短补偿电流全动态响应时间,减小输出电流畸变量,且现场测试系统电网功率因数得到大幅提高,输出电压电流相位相同,完全满足系统无功补偿控制要求。
Aiming at solving the problem of static vat generator（SVG） traditional harmonic current control mode output more and the slow response of currents, the working principle and running characteristic of stationary voflageless generator were introduced, proposed direct power based on virtual flux oriented control strategy（VF-DPC）, to calculate the difference between the instantaneous power and power was given based design uses the idea of the double hysteresis voltage vector within the sector of improve the switching table, select the table difference vector into the switch, and the switch mode rectifier to achieve system control. While based on the TSM320LF2812D DSP platform, the Matlab/Simulink tool was used to simulate debugging compensation scheme for VF-DPC, and the laboratory system was applied in metallurgical system. The results indicate that static vat generator can shorten the response time compensation based on a direct current power virtual flux oriented control, reduce the output current distortion, and the power test system factor is improved greatly, the output voltage and current phase, fully meet the non reactive compensation control system.
出处
《机电工程》
CAS
2014年第8期1082-1085,1097,共5页
Journal of Mechanical & Electrical Engineering
关键词
静止无功发生器
直接功率控制
功率闭环控制
仿真
static vat generator（SVG）
direct power control
closed loop power control
simulation
