摘要
多功能并网逆变器(multi-functional grid-tied inverter,MFGTI)在实现分布式电源(Distributed Generation,DG)并网的同时能够兼具电能质量治理的功能,相比功能单一的并网逆变器,具有更好的应用前景。针对分布式电源的多功能并网逆变器进行研究,针对传统PR控制器,提出一种基于改进PR控制的多功能逆变器跟踪控制方法,除了并网控制外还兼具了滤除谐波电流的功能。设计了应用多层PIR控制器的双环PQ逆变器控制,使并网的分布式电源除了提供功率以外还能够有效滤除特定次数谐波。建立该控制系统的数学模型并且利用DIGSILENT/Power Factory对其进行仿真,验证了该控制系统的正确性和有效性。仿真结果表明,所提出的多功能逆变器除了能够改善并网点的电能质量,还能够满足微网的要求,对并网点进行PQ控制。
The multi-function grid-connected inverter is able to condition the power quality while serving as an interface between the distribution generations and the grid.It has a better prospect comparing with the single-function grid-connected inverter.In this paper,the conventional PR contr oller is reviewed.Based on characteristic of the PR control,a new ea tracking control of the multi-function grid-connected inverter for interfacing the distribution generations to the grid is proposed based on by implementing the improved PR control. In addition to the grid connected control of the fundamental harmonic,it is also able to filter the harmonic currents.A dual loop PQ control using several parallel PIR controllers to control the grid-connected distributed generation is designed in order to effectively eliminate certain harmonics.The mathematical model of the control system is established and simulated via Power Factory/DIgsilent. The validity and effectiveness of the proposed control system is verified by simulation.The simulation results show that the proposed multie-function inverter is able to not only satisfy the requirements of the micro-network and PQ control for grid-connection but also improve the power quality within the grid.
出处
《山东电力技术》
2017年第6期35-40,共6页
Shandong Electric Power
关键词
分布式发电
谐波补偿
多功能逆变器
PIR控制
distributed generation
harmonic compensation
multifunctional inverter
PIR control
