无功功率自动补偿控制系统的研究和设计

【作者】 何大春；

【导师】 都洪基； 王能才；

【作者基本信息】 南京理工大学 ， 动力工程， 2002， 硕士

【摘要】 低压配电网是负荷供电的直接来源。在电力负荷中，有很大一部份是感性负荷，它不仅消耗有功功率也吸收很多无功功率，造成功率因数下降，降低供电质量和供电能力。 本文在充分调研的基础上，认为目前采用的传统的无功功率补偿装置存在响应速度慢、触发时刻不合适、补偿电容器上有残压、不能实行三相平衡补偿、对电网产生污染、不能消除负荷本身产生的高次谐波等弊病。针对这些实用性不强的无功功率补偿装置，本文提出了采用静止式无功功率自动补偿分相控制的系统总体方案，使补偿响应速度和补偿精度大为提高。主控器以80C196单片机为系统核心，触发采用晶闸管反并联动态补偿模式，本文进行了系统硬件设计、软件设计。在提高补偿精度和抗干扰方面进行了较为深入的研究。进行了动模试验，验证系统达到了设计要求。更多还原

【Abstract】 The T&C net of low voltage is direct resource of loads linked on.. There are various inductive loads on the net. It will not only consume active power, but also absorb more reactive power. Lastly, it can results in lowering power factor (cos ^φ), and also damaging the quality of low voltage power’s net. And it degrades seriously the ability of supplying power.On the base of widely investigating and researching, author deems that the conventional reactive power compensation devices used by consumer had many defects with among others: lower response time, remaining residual voltage on the compensation capacitors , and so on. Because of existing improper trigging time, It is impossible to realizing balance compensation for 3-phrase unbalance loads. Meanwhile it can contaminate T& C low voltage power net too, and does not eliminate harmonics created by consumers themselves.Aimed to the above mentioned defects of reactive power compensation devices being used widely up to now and no value of practical application, the article described the principle of compensation reactive power controlled by intellectual static auto-compensation system which is of every phrase active power compensation and three phrase balance compensation. The compensation system will result in decreasing response time and improving compensation accuracy. The main controller based on the chip-microprocessor 80cl98, and the model of dynamic compensation with inverse parallel rectifier diodes were taken. The stipulated requirement of development and research were fully reached during dynamic simulative test.更多还原