【作者】 韩琳；

【导师】 陈柏超；

【作者基本信息】 武汉大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 在电力系统中，电压的波动和无功功率的过剩和不足会严重影响供电质量。通过合理有效的补偿，可以在保持电压合格的基础上，最大限度的保持无功功率的平衡。也就是说，通过无功电压综合补偿，可以大大提高供电质量。 本文首先从理论上阐述了变电站无功电压综合控制的目标及原理。根据传统九区图法的特点，设计了相应的控制规则。随后，本文提出了上述无功电压综合补偿的一个实现—固定电容器+磁阀式可控电抗器(Fixed Capacitor+Magnetic-Valve Thyristor Controlled Reactor-FC+MCR)型的静止无功补偿器。本文详细分析了MCR的原理，在此基础上得出了MCR的各种特性。另外又提出了MCR的一种新的结构—三相六柱MCR，并分析了其磁通分布和优化接线方式。 对于实际应用的MCR，要求能够自动控制。本文采用以单片机为核心的设计控制器的方案。包括检测电路、控制电路、触发电路、键盘显示电路和通信电路等。检测电路用于检测变压器二次侧的电压和电流并获取同步信号；控制电路根据相应的控制策略，对检测信号和给定输入量进行计算，给出控制信号；触发电路根据控制信号输出的控制信号产生相应触发角的晶闸管触发脉冲；键盘可用来输入各种控制指令，显示电路可以直观的输出系统的各种状态；通信电路提供与控制站的数据交换，以便实现电力系统的集中控制。 本文的最后，对所提出的补偿器模型进行了仿真和实验验证。仿真和实验的结果与上述理论分析是一致的。这说明本文所提出的补偿理论的正确性和切实可行。更多还原

【Abstract】 In power system, the voltage pulsation and deficiency or surplus of reactive power will have a great effect on the quality of electric power supply. Through the appropriate and effective way of compensation, we can keep the balance of reactive power in the maximum degree by the maintenance of acceptable voltage. That’s to say, quality of power supply can be improved greatly by the synthetic compensation of reactive power and voltage.At first, the paple does some theoretical expounding on the control objective and the principle of the substation synthetic compensation of reactive power and voltage. According to the characteristic of nine-area diagram.the corresponding control ordination is designed. Subsequently the paple presents the realization of the synthetic compensation of reactive power and voltage mentioned above, which is so called FC + MCR (Fixed Capcitor + Magnetic-Valve Controllable Reactor), and is one of the SVC (Static Var Compensator). This paple analyzes the principle of MCR in detail, and derives the characteristics. In addition, a new structure of MCR - Three phrase hexastyle MCR. It’s magnetic flow distribution is analysed and mode of connection is optimized.This paper presents a controller with an SCM (Single Chip Microcomputer) as the core, which can automatically control the practical MCR. It consists of measure circuit, control circuit, trigger circuit, keyboard, display circuit and communicating circuit. The measuring circuit is to measure the secondary voltages ang currents of transformer and capture the synchronous signal; the control circuit is to calculate the control outputs with the measured signal and the input parameter according the relevant control scheme; the trigger circuit products the pulses to trigger the thyristors with the control outputs; user can input control instruction with the keyboard, and the display circuit can show states of the system intuitionisticly; communicating circuit provides the data to control station, this can realize the concentrative control.At the end of paper, simulator and experimental research are carried out for the compensator model; the results accord with the theoretical analyses done before. So the compensator is proved to be accurate in theory and feasible in practice.更多还原