毕业论文--基于单片机的无功补偿装置设计论文.docVIP

基于单片机的无功补偿装置 摘 要：众所周知的，在现在的电力网中，因为现在的低压电网里面的大多数电力设施都是感性的负载，由于它的特性，所以普遍存在着功率因素较低，在电网中消耗的线路损耗较大，造成电力能量比较差，所以，在实际中，无功补偿很完美的运用在各行各业。但一些老的的做补偿装置的准确度低，容易对电网产生震荡等等缺点，所以比较难在实际中实现。在电力系统本身来说,如果需要保证电力系统运行的稳定性和它的经济性，那么保证无功补偿的稳定就是一定的，在正常的来说，当运行正常的时候，如果它的无功功率不能被其他的装置维持的话，那么电网中就需要提供大量的无功功率，这就会引起电压的降低或者线损的增加，所以，不管是需要维持电力系统的稳定还是我们想要的低成本，在电网中，我们都要加装一些装置，用来补偿无功功率。 针对这种情况，本课题设计了一种全自动无功补偿装置。主要采用ST89C52单片机进行自动控制。系统对电网电压和电流进行采样、计算，从而获得COS∮和有功功率。本装置可实现功率因素从很低到，而且能让电容自动投切进电路，并且能显示补偿后的功率因素和补偿前的，和线路电流电压。 关键字：无功补偿 ST89C52单片机 功率因素 自动控制 Abstract:As we all know,In the industrial production process,Classification and statistical work of different goods and commodities in the pipeline is a daunting task.Especially in the process of packing shipment of goods.In the era of manual processing.It will cost a lot of manpower. A fully automatic reactive power compensation devices. This device is in the previous inspection manual or electromagnetic reactive power compensation devices based on self-designed by the author, mainly using AT89C51 single-chip microprocessor as the realization of automatic control.System to the power grid voltage and current sampling, computing, to gain COS ∮ and active. The device can be realized from the power factor COS ∮ = 0.6 compensation to the COS ∮ = 0.95, power factor and can ensure that changes in the automatic switching to real-time shows that the current power factor, current and active, and can achieve the manual and automatic control. The system hardware circuit structure is simple, including laser sensor module, shaping circuit module, control unit module, human-computer interaction module, and digital camera interface circuit module. The control unit uses STC89C52 as the core controller. Human-computer interaction module includes a separate keyboard and LCD1602 LCD display circuit. Through the test of this design fully meet the requirements of the design requirement. Keywords: Reactive power compensation; Power Factor; Automatic control; STC89C5