作者：薛家祥¹, 赖炜敏¹, 郑照红¹, 易春阳²

作者单位：1. 华南理工大学机械工程学院, 广东 广州 510640;
2. 惠州学院电子信息与电气工程学院, 广东 惠州 516007

关键词：电力载波;多逆变器并网系统;混合式孤岛检测

摘要：

针对多逆变器并网系统在监测时出现的信道冲突和传统孤岛检测法产生稀释效应、并网谐波率高的问题，该文利用电力载波技术，设计一种适用于多逆变器并网系统的监测及混合式孤岛检测法。该方法设计逆变器节点、集中器的硬件结构和通信协议，并综合远程法和自适应Sandia频率偏移（SFS）法的优点提出混合式孤岛检测。实验和仿真证明：该方法能解决多逆变器并网系统使用电力载波通信时信道冲突和数据包丢失的问题，而且能消除稀释效应的影响，缩短孤岛检测时间、降低并网谐波率。

Monitor and islanding protection method for multiple inverters grid-connected system

XUE Jiaxiang¹, LAI Weimin¹, ZHENG Zhaohong¹, YI Chunyang²

1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. School of Electronic Information and Electrical Engineering, Huizhou University, Huizhou 516007, China

Abstract: In view of the channel conflict in the monitoring of the multiple inverters grid-connected system, the dilution effect and high harmonic generation rate of the grid connected system produced by the traditional islanding detection method, a method of monitoring and hybrid islanding detection for the multiple inverters grid-connected system in designed by using power line carrier technology. The hardware structure and communication protocol of the inverter node and concentrator are provided, and a hybrid islanding detection is proposed by synthesizing the advantages of the remote method and the adaptive Sandia frequency shift (SFS) method. Through simulation and experiment, it has been proved that the method can solve the problem of channel conflict and packet lossarising when the power line carrier communication is used by the multiple inverters grid-connected system, and can also eliminate the impact of the dilution effect, shorten islanding detection time and reduce the grid harmonic generation rate.

Keywords: power line carrier;multiple inverters grid-connected system;hybrid islanding detection

2018, 44(1): 89-94  收稿日期: 2017-06-23;收到修改稿日期: 2017-08-11

基金项目: 2015东莞市引进第三批创新科研团队项目（2017360004004）；广东省自然基金项目（2015A030313675）；广州市南沙区科技项目计划（2016CX010）；广东省交通厅科技项目（科技-2017-02-041）

作者简介: 薛家祥(1963-),男,江苏徐州市人,教授,博导,研究方向为光伏并网逆变器及其分布式发电系统,数字化开关电源及智能控制,智能传感技术及网络化测控。

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