基于新型单锁相环的风光储调频调压控制策略研究

Research on Frequency and Voltage Regulation Control Strategy for Wind and Solar Energy Storage Based on a Novel Single Phase Locked Loop

研究了风光储微电网的控制策略及并离网平滑切换,并在Matlab/Simulink仿真平台搭建了仿真模型,验证了所提控制策略的有效性。光伏并网逆变器部分采用双级式结构,风力发电部分采用永磁直驱式风力发电模型,蓄电池部分采用基于下垂控制,与风光并联实现能量互补。其中,光伏和风力的逆变器均采用一种新的基于电网电压定向的矢量控制,用来稳定直流侧电压。针对风光储并离网切换冲击电流较大的问题,提出一种新的基于单锁相环的预同步方法,实现平滑并离网切换。仿真表明,风光储可以在孤岛、并网下均可以稳定运行并实现互补,且实现了平滑并离网切换。

This article studies the control strategy and smooth switching of wind and solar energy storage microgrids,and builds a simulation model on the Matlab/Simulink simulation platform to verify the effectiveness of the proposed control strategy.The photovoltaic Grid-tie inverter part adopts a two-stage structure,the wind power generation part adopts a permanent magnet direct drive wind power generation model,and the battery part uses droop control to realize energy complementation with the wind/solar parallel connection.Among them,both photovoltaic and wind power inverters adopt a new vector control based on grid voltage orientation to stabilize the DC side voltage.A new pre synchronization method based on a single phase-locked loop is proposed to address the issue of high impulse current during parallel and off grid switching of wind and solar energy storage.This method achieves smooth and off grid switching.Simulation shows that wind and solar energy storage can operate stably and achieve complementarity in both isolated and grid connected environments,and achieve smooth and off grid switching.