小型并网光伏电站智能监控系统的研究

摘要

针对小型光伏电站并网发电的监控需求,说明监控系统应具备的3个基本功能,即电能质量监控、电能计量和并网控制.讨论基于经济方式的上网电费计量方式和一种防止孤岛效应的控制方式.提出基于无线传感器网络的小型并网光伏电站智能监控系统,具有分布式数据采集、易组建和自组织等特点,可实现对大范围分布式光伏电站的智能监控.此外,该监控系统由基于ZigBee技术的无线传感网络和移动通信网络组成,具有系统结构简单、成本低等优点.描述整个监控系统的结构和工作原理,分别给出网关节点和监控节点的硬件结构和软件流程.%This paper proposes a smart monitoring system based on wireless sensor network (WSN) for small grid-conneeted PV power stations. The monitoring system provides three fundamental functions: power quality monitoring, energy billing and grid-connection control. The WSN benefits from distributed data sampling and self-configure ability. Thus it can cover many distributed power stations in large scale. The monitoring system consists of the WSN based on ZigBee technology and mobile communication network. The structure and principle of the WSN are introduced. The hardware structures and software flowcharts of coordinators and monitoring nodes in WSN are presented in detail.