新能源发电系统中并网逆变装置的锁相技术研究

摘要

In view of fact the traditional phase locked technique has great error caused by the transient over -shoot current and harmonic , this paper put forward a new phase locked technique through the theoretical a-nalysis.This new technique can eliminate the phase shift which filter circuit produces through a method that a phase analysis is added in the process.This new technique not only guaranteed the accuracy of phase locked technique , but also improved the performance of grid inverter and strengthened the utilization efficien-cy of new energy.Simulations verify the validity and feasibility.%针对电网中出现瞬态过冲电流和谐波等问题会导致传统的锁相技术具有较大的误差，本文通过相关理论分析提出一种新型锁相技术，该方法根据滤波电路会使检测电路产生相位偏移，在程序中添加一个相角就能消除这个相位偏移，从而不会影响锁相精度的技术，提高并网逆变器的性能，增强新能源的利用效率。仿真结果验证所提出的锁相技术的正确性与可行性。