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低压电网无功补偿研究及实现
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摘要
论文分析了无功补偿的原理和目的,针对当前低压无功补偿的情况,给出了无功补偿的离线优化方法,并结合辐射状电网和非辐射状电网得出相应的补偿容量。在实时补偿方面,针对不同的负荷状况,根据配电网络电容器组优化投切模型,从实时的角度研究电容器组的投切,推导出电容器组实时投切的线性整数模型以及这种模型的解法;对一些无功变化迅速的负荷,则给出直接以无功功率做控制量的简单模型。
     论文给出了并联电容器组对谐波作用的分析,分析了电容器组星形接线与三角形接线方式对谐波的影响。
     设计了一套以80C196KB为核心的智能无功补偿装置,该装置以无功功率最小作为控制策略,以电压作为约束条件。论文阐述了该控制器的硬件原理及电路图、软件框图和部分程序。
This paper introduced the principle and objective of var compensation, present the model of reactive power optimization planning about low voltage system. According as radiant or other power system, the compensatory capability was gained. On real time compensation, aimed at different load condition, based the former research, this paper deduced the linear integer model for capacitor switching and gave the resolving. And introduced the simple model direct on reactive power to some load where the reactive power changed rapidly.
    This paper analyzed the function of harmonic currents about parallel connection capacitor to power system. And analyzed the harmonic currents effect on "Y" or "triangle" connection.
    An intelligent device was designed for var compensation. The device took the 80C196KB singlechip micro-controller as main control chip, took reactive power as control target and took voltage as restricting condition. In this paper, it expounded the principle and electric circuits of hardware, the design of software and some program.
引文
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