文档介绍：兰州理工大学毕业设计说明书
摘要

无功功率是影响电力系统稳定的一个关键因素。它关系到整个系统能否安
全稳定运行。随着科技的进步与发展,现代设备工作时所需要的无功功率逐步
增大,且无功功率在电力网络中的分布越来越复杂。因此对无功补偿的要求也
日益提高,许多传统的无功补偿方式和设备越来越不适应当前发展的需要。
本文首先介绍了无功补偿的发展及现状,重点涉及了基于单片机控制的静
态无功功率补偿系统(SVC)。本文以三相对称正弦交流电为基础。硬件上,采
用 Intel 公司 16 位单片机 80C196KC 作为主控制芯片,通过信号调理电路对三
相电压、电流信号进行采样,用 TSC 并联电容器组作为无功补偿装置,其中输
出驱动芯片采用 MOC3061 芯片控制进行过零投切。软件上以 80C196KC 单片机为
控制核心,通过编程完成 AD 采样,电压电流及功率因数的相关计算,并实现对
输出电容器组投切控制。该系统由大功率晶闸管电路对多级电容器组进行自动
投切, 能够对线路无功功率进行实时补偿。其无触点不发热、小冲击、过零投
切、安全可靠、免维护,实现了自动补偿、无人值守的功能,解决了以往有触
点投切工作不可靠、故障率高、维护量大、使用寿命短等缺点。

关键词:电力补偿;80C196KC;控制系统;单片机

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兰州理工大学毕业设计说明书
Abstract

Reactive power is a key factor that impacts power system stability. It relates to the
safe and stable operation of the whole system. With the progress of science and
technology ,the reactive power is needed to increase gradually , and it es more
and plicated in the distribution of work. Therefore the
requirement of reactive pensation is increasing, many of the traditional
way of reactive pensation are less to the current development needs.
This paper describes the current situation and the development of reactive power
compensation, involving the static-based SCM system reactive pensation
(SVC). In this paper, taking three-phase symmetric sinusoidal alternating current as
a starting point.. Hardware based on 16 bit puter 80C196KC of Intel
corporation as the main control chip, through the signal circuit for three-phase
current and voltage signal sampling, the use of TSC shunt capacitor set as reactive
compensation devices, including output driver MOC3061 chip control chip adopt
zero cutting. Software based on 80C196KC single-chip puter as control
core, through plete AD sampling, complete voltage, current, and
power factor’s calculation, and achieve switch-on and swich-off of capacitors’
control. This system consists of high-power thyristor circuit of multilevel capacitor
set to switc