摘要
以异步电机为负载模型分析了电压空间矢量原理与合成方法,在此基础上提出了一种新型的以电网基波频率同步旋转坐标系下电网电压和电流比例积分并结合柔性环节综合控制的三相光伏逆变器并网策略,给出了一种较简单的硬软件综合锁相的方法,柔性环节的加入能够控制逆变输出电流幅值缓慢增加,使得逆变器能较好地实现并网软启动。以1台6 kVA样机进行试验,其结果验证所提出方案的可行性、有效性。
The paper analyzes the principle of voltage space vector and synthesis method hased on the model of asynchronous machine,on this basis,put forward a new type base on the synthetically control scheme of grid voltage controller and current PI controller addicted with flexible unit under two phase synchronous rotating frame and combined with the flexible unit that comprehensive control of three-phase PV inverter grid connected strategy,given a simpler method of hard and software integrated phase locking,the addition of flexible unit can control inverter to output amplitudes of currents increasing slowly,made inverter realizing soft starting very well.Experiment with a 6kVA prototype,the results showed feasibility and effectiveness of the proposed scheme.
出处
《安徽电力》
2013年第4期30-33,共4页
Anhui Electric Power
关键词
电压空间矢量
柔性环节
软启动
并网
锁相
voltage space vector
flexible unit
soft starting
grid connected
phase locking
