摘要
概述并网用网侧变流器工作原理,分析其工作模式,探讨了基于只与开关频率相关的预测电流控制(PCFF)和电网电压前馈相结合的控制策略,该策略能够弥补三电平变流器直流侧电容电压不平衡的先天性缺陷,而且PCFF控制下的系统有快速的动态响应,特别易于数字化实现。构建仿真模型分析验证了控制策略的有效性和可行性。
In this paper, the theory of three-level grid convertor and the working state are analyzed in detail. The control strategy with fixed predictive current control and grid voltage forward-fed just like SVPWM for the converter is used in the grid convertor. The adopted control method is not only to be easily carried out by digital processor but also able to cope with the voltage unbalancing problem of DC capacitors and the dynamic performance is excellent. Simulation result verified that control strategy is valid and feasible.
出处
《通信电源技术》
2009年第6期24-26,共3页
Telecom Power Technology
关键词
变流器
预测电流控制
电网电压前馈
三电平
converter
predictive current control
grid voltage forward-fed
three-level
