【作者】 韩昆仑；

【导师】 梁小冰；

【作者基本信息】 广西大学 ， 农业电气化自动化， 2004， 硕士

【摘要】 无功功率是影响电压稳定的一个重要因素，它关系到整个电力系统能否安全稳定的运行。无功功率对电力系统带来很多影响，如：增加设备的容量、增加设备和线路的损耗等等。因此无功补偿技术是多年来研究的重点之一。随着技术的不断进步和发展，各种设备工作时所需要的无功功率不断增大，并且无功功率在电力网络中的分布越来越复杂。因此对无功补偿的要求也越来越高，许多现有的无功补偿方式和设备越来越不适应发展的需要。 本文介绍了功率理论的发展，以及常用的无功补偿方式的原理和特点，同时重点介绍了瞬时功率理论以及以此为基础的静止无功发生器。在此基础上，提出了以瞬时功率理论为基础的静止无功发生器不仅适用于输电系统，而且也适用于三相四线制的配电系统。 文中采用电磁暂态仿真软件PSCAD／EMTDC对以瞬时功率理论为基础的静止无功发生器在几种不同情况下的补偿效果进行了研究，同时也对三相四线制系统的情况进行了仿真，验证了以瞬时功率理论为基础的静止无功发生器同样适用于三相四线制的配电系统这一观点。由此证明其具有广泛的应用前景。更多还原

【Abstract】 Reactive power is an important factor to the voltage stability, and it is also related to secure and steady operation of the power systems. Reactive power affects the power system in many ways, such as it increases the capacity of the equipment and the loss as in the equipment and the transmission lines. With the developing of the technology, the reactive power demand is increased continuously, and the distributing of reactive power in the power system becomes more and more complex, so the requirement of reactive power compensation is increasingly rigorous.In this paper, the development of power theory and reactive power compensation equipment are introduced, and the emphasis is on the instantaneous power theory and the Static Var Generator (SVG) based on this theory. This paper presents a viewpoint that the Static Var Generator (SVG) can be used not only in transmission system but also inthree-phase four-wire distribution system.PSCAD/EMTDC simulation software is used in this paper to test the SVG compensating effects for different operating conditions, including three-phase four-wire operation. The effectiveness of the SVG in the three-phase four-wire system is confirmed.更多还原