摘要

我国农村电网经过几次大型的改造升级建设后，农村的电力基础设备水平都有了大幅度的提高，这样促进了农村经济的发展。在农网整体架构条件能够保障的前提下，进行了新一轮的农村电网改造计划，如何能够保障农网配电自动化系统建设和进一步打造可靠地供电环境对于农网新一轮的改造意义重大。

目前农村电网无功补偿已经成为确保农村经济发展和农村电网安全使用的主要方式和手段之一，其提升了农村电网电压质量和农民用户用电的可靠性，降低了对电能损耗。当今的电力系统中，负载绝大多数以感性形式存在，以农村为例，负载主要以电动机和变压器为主，这种负载的存在会产生大量的无功功率，导致农网中功率因数偏低，出现供电质量差，线路损失严重等问题，因此提高功率因数就成为提高送电质量的关键。晶闸管投切电容器（TSC）是目前应用比较广泛的一种无功补偿的方法，在系统中加入控制芯片，可以使其实现实时动态补偿的目的。

本论题以DSP控制器为核心，通过对农网中三相电流、电压的实时采样，并将数据送入DSP中进行分析处理，来确定无功补偿的容量和方法，进而控制电容器组的投入与切除，来达到补偿的目的，以减少企业及个人的损失。

关键词：农村电网；无功补偿；补偿装置；DSP；控制器

ABSTRACT

After several large-scale transformation and upgrading of rural power grid in China, the level of rural power infrastructure has been greatly improved, which has promoted the development of rural economy. On the premise that the overall structure of the agricultural network can be guaranteed, a new round of rural power grid transformation plan has been carried out. How to ensure the construction of distribution automation system and further build a reliable power supply environment is of great significance to the new round of transformation of agricultural network.

At present, reactive power compensation in rural power grid has become one of the main ways and means to ensure the development of rural economy and the safe use of rural power grid. It improves the voltage quality of rural power grid and the reliability of farmers' electricity consumption, and reduces the power loss. In today's power system, most of the loads exist in inductive form. Taking rural areas as an example, the load is mainly motor and transformer. Therefore, improving power factor is the key to improve power transmission quality. Thyristor switching capacitor (TSC) is a widely used reactive power compensation method. Adding control chip to the system can make the purpose of dynamic compensation in reality.

This paper takes the DSP controller as the core, through the real-time sampling of three-phase current and voltage in the agricultural network, and sends the data into the DSP for analysis and processing, to determine the capacity and method of reactive power compensation, and then control the input and removal of capacitor banks to achieve the purpose of compensation. In order to reduce the loss of enterprises and individuals.

Keywords: rural power grid; reactive power compensation; compensation device; DSP; controller

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ABSTRACT

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