风力发电用大功率并网逆变器研究  

Research on High Power Grid-connected Inverter for Wind Power Generation

作　　者：王振欣 WANG Zhenxin(Guohua Hulunbuir Branch of Hailar New Area, Hulunbuir, Neimenggu, Hulunbeier, Neimenggu, 021000, China)

机构地区：[1]内蒙古呼伦贝尔海拉尔新区国华呼伦贝尔分公司,内蒙古呼伦贝尔021000

出　　处：《水电科技》2019年第3期45-52,共8页Hydroelectric Science & Tecnology

摘　　要：在高功率风力发电系统中,连接到电力网络的GTI是实现电力上网的一个整体的重要组成部分,但由于GTI使用的脉冲宽度调制信号开关电源的频率相对来说比较低。因此在发电网络中,输出电流往往包含高电流谐波。高谐波将会增加电路的电能损耗,影响电路的正常运行,加促电路老化甚至产生电路的安全事故,为了减少电流谐振,将T型滤波器连接到电网络GTI系统中,以替换掉传统上的电感滤波器,并将T型滤波器引起的不稳定性提供了一种基于桥臂的闭合电流回路与电压和电流的前馈控制组合的间接控制方案。有效地实现与电力网络连接的GTI可以持久稳定的正常工作,并发挥良好的电力性能。In high power wind power generation system, GTI connected to power network is an important part of realizing power network, but the frequency of pulse width modulation signal switching power supply used in GTI is relatively low. Therefore, in the power generation network, the output current often contains high current harmonics. High harmonics will increase the power loss of the circuit, affect the normal operation of the circuit, promote the aging of the circuit and even produce the safety accident of the circuit. In order to reduce the current resonance, the T-filter is connected to the electric network GTI system to replace the traditional inductance filter and the instability caused by the T-filter. An indirect control scheme based on the combination of closed current loop of bridge arm and feedforward control of voltage and current is provided. The GTI connected to the power network can work stably and stably, and play a good role in power performance.

关 键 词：GTI T型滤波器 谐波衰减 前馈补偿 

分 类 号：TM315[电气工程—电机] TM464