基于MSP430的高压智能无功补偿控制器的研制

【作者】 刘宏志；

【导师】 谢利理；

【作者基本信息】 西北工业大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 本文针对我国电网无功补偿的现状和现有高压无功补偿装置的缺陷，设计了一种以10KV配电网为补偿对象的智能型高压无功补偿控制器，并且介绍了无功功率的基本概念和无功补偿的基本原理，对无功补偿方式的选择、无功补偿容量的确定以及无功补偿的经济技术效益等问题进行了分析。 高压智能无功补偿控制器以FLASH型16位单片机MSP430F149为控制核心，采用了一种相角实时测量的新算法，并在此基础上计算出了功率因数、有功和无功，减少了运算量提高了精度；在分析了各种无功补偿控制策略的基础上，以母线电压和无功功率复合判据控制投切，并提出一种改进的电容器投切方式——暂态投切控制晶闸管过零触发，避免了电容器投切时的电流冲击；稳态运行时接触器替代晶闸管，实现无功补偿的自动跟踪和电容器的自动投切，解决了投切时的暂态电流冲击和稳态时可靠运行的难题；控制器的原始运行参数采用FLASH自编程技术，将其保存在MSP430F149片内的信息FLASH中，简化了硬件电路，大大提高了系统的可靠性。控制器采用无线通信和有线通信的的方式实现人机交互。本文还给出了系统软硬件抗干扰措施。 该高压智能无功补偿控制器已完成调试与功能测试实验，并验证了设计方法的可行性。更多还原

【Abstract】 In term of the actuality of var compensation in power system and the disadvantages of the existing high-voltage var compensation equipments, the paper presents the design of a new kind of high-voltage intelligent var compensation controller applying to the 10KV distribution network. The basic concept of the reactive power and the essential principle of var compensation are reviewed and the modes, the capability and the economic and technical benefits of var compensation are analyzed.The controller uses the 16-bit flash-based MSP430F149 MCU and a new kind of algorithm to measure phase angle in power system. The power factor, active and . reactive power are calculated using the new algorithm. On the basis of analyzing different kinds of control strategies of var compensation, the paper applies the criterion of voltage and var to control switching and illustrates a improved mode of switching capacitor which can prevent the switched-capacitor from the impacting of instantaneous rush currents by means of zero-crossing triggering of SCR components, and can realize auto-tracking var and auto-switching Shunt Capacitor Bank. Initial operating parameters are stored in information flash memory of the MCU using flash self-programming technique in order to decrease complexity of the circuit and improve stability. Both wire and wireless communication methods are used to realize communication between controller and operator. The paper also illustrates some practical hardware and software reliability measures.The high-voltage intelligent var compensation controller described in the paper has already tested by experiments.更多还原