1、 共 32 页 第 1 页 装 订 线 摘要 本课题研究以低压电网无功补偿改造为背景， 研制了一种 360KVAR 无功功率补偿 装置，该装置以实时的电网监测数据为依据，采用动态补偿的方式，投切、分段时按 国家有关规定限制涌流，补偿断电源功率因数不低于 0.95，自动补偿电网中的无功 损耗，提高功率因数，降低线损，从而提高电网的负载能力和供电质量。 装置采用 JKL2B12 系列无功功率自动补偿控制器，取样物理量为无功电流，交 流采样抗电网高次谐波干扰，提取基波电力参数控制投切电力电容器来提高功率因 数。电容器接触器则采用 CJ19-63/21 系列，该接触器带有抑制涌流装置，能有效的 减少合
2、闸涌流对电容的冲击和抑制开断时的过电压。 关键字关键字：无功补偿，低压,控制器，接触器，电力电容器 共 32 页 第 2 页 装 订 线 AbstractAbstract What this article studies is based on the alteration of reactive power compensation of low voltage, then developed a 360KVAR reactive power compensation device.The device based on the monitoring data of the grid in
3、 real time,the use of dynamic compensation based on the way when cutting, subsection, throwing in accordance with relevant state regulations limit inrush current, power factor compensation off power not less than 0.95 automatically compensate reactive power loss in the grid, improving power factor,
4、reduce line loss, so as to improve the load capacity and power supply quality. Device uses JKL2B - 12 series of reactive power automatic compensating controller, sampling parameters for reactive current power resistance, ac sample HHG interference, extraction base wave power parameter control electr
5、ic power capacitor to cast cut increase power factor. Capacitor contactor has adopted CJ19-63/21 series, this contactor with reject inrush current device, it can effectively reduce the impact of capacitance gushed off when open circuit and inhibition of overvoltage. Key wordsKey words: reactive power compensation, low voltage, controller,contactor, electric power capacitor 共 32 页 第 3 页 装 订 线 目录 摘要 . 1 AbstractAbstract 2 目录 . 3 第 1 章 绪论 4 1.1 研究背景. 4 1.2 无功补偿的发展状况. 4 1.3 本文的研究内容. 6 第 2 章 无功补偿的原理 7 2.1 无功补偿的原理. 9 2.2 低压电网中的几种无功补偿方式 11 2.3 确定补偿容量的几种方法 11 2.3.1 从提高功率因数需要确定补偿
