中国电机工程学报2017，Vol.37Issue(11)：3243-3253,11.DOI:10.13334/j.0258-8013.pcsee.161779
谐波电压下并网逆变器的无锁相环直接功率控制
Direct Power Control of Grid-tied Voltage Source Inverter Without Phase-locked Loop Under Distorted Voltage Conditions
摘要
Abstract
In order to enhance the operation performance of the grid-tied voltage source inverter (VSI) under distorted voltage conditions,the paper proposed a direct power control (DPC) strategy without phase-locked loop (PLL).The scheme was implemented based on a virtual synchronous reference frame,so that the potential instability problem caused by the PLL can be eliminated.A second-order vector integrator (SOVI) was employed to eliminate the harmonic current components or power fluctuations directly,achieving three different control targets of smooth active power,smooth reactive power or sinusoidal output current.Meanwhile,a grid frequency estimation technique was proposed,which can make the control strategy self-adaptive to the frequency variation in the practical situation.Finally,the experimental system of the VSI was built to validate the effectiveness of the strategy.关键词
谐波电网电压/并网逆变器/直接功率控制/无锁相环/二阶矢量积分器/频率偏移Key words
distorted voltage condition/voltage source inverter/direct power control/no phase locked loop/second-order vector integrator/frequency deviation分类
信息技术与安全科学引用本文复制引用
年珩,李龙奇,程鹏..谐波电压下并网逆变器的无锁相环直接功率控制[J].中国电机工程学报,2017,37(11):3243-3253,11.基金项目
国家自然科学基金项目(51622706) （51622706）
风力发电系统国家重点实验室开放课题基金(2016001).Project Supported by National Natural Science Foundation of China (51622706) （2016001）
Project supported by state key laboratory of wind power system in China (2016001). （2016001）
