基于三相光伏并网逆变器的新型孤岛检测方法研究

发布时间：2018-03-28 07:09

本文选题：逆变器　切入点：孤岛检测　出处：《华东交通大学学报》2016年06期

【摘要】：孤岛效应是指一个或多个光伏系统在没有电网支撑的情况下给本地负载供电的现象是光伏发电系统并网过程中的主要问题之一。非计划的孤岛效应必须在最短的时间内被监测出来并采取措施来保证工作人员的安全和设备不被损坏。反孤岛的检测方法主要分为主动式、被动式检测法和通迅检测法,被动检测法具有响应快和对输出电能质量不产生影响的优点,该方法的缺点是具有较大的检测盲区(NDZ),另一方面,主动检测法拥有相对较小的NDZ,并且同样迅速。但是传统的主动孤岛检测方法一般是通过注入扰动分量,这样不利于电网的电能质量。提出一种注入三次谐波的孤岛检测法,不仅能够有效的检测出孤岛发生,还能够在一定程度上改善电网电能质量。并对该方法进行仿真和试验验证。仿真和实验结果证明了该方法的可行性和有效性。
[Abstract]:Islanding refers to one or more of the photovoltaic system without grid to support the case for local load power supply is one of the main problems of grid connected photovoltaic power generation system. In the process of non islanding plan must be in the shortest possible time to be out and take measures to monitor safety and equipment to ensure the staff is damaged. The anti islanding detection method is mainly divided into active, passive detection method and communication method, passive detection method has fast response and the output power quality has no effect, the shortcomings of the method is detection zone (NDZ), on the other hand, the active detection method has a relative the smaller NDZ, and just as quickly. But the traditional active islanding detection method is by injecting a disturbance component, which is not conducive to the power quality. This paper proposed a three harmonic injection method for islanding detection, not It can detect isolated island effectively and improve the power quality of power grid to a certain extent. The method is simulated and verified by experiments. Simulation and experimental results prove the feasibility and effectiveness of the method.

【作者单位】：华东交通大学电气与电子工程学院;
【基金】：国家自然科学基金(51467006) 江西省科技厅项目(20151BBE50118,20161BBH80032)
【分类号】：TM464;TM73;TM615

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