【作者】 吴蓉；

【导师】 王正仕； 楼凤丹；

【作者基本信息】 浙江大学 ， 电气工程， 2011， 硕士

【摘要】 在电力系统中,由于存在多种电容性和电感性负载,所以在有功功率流动的同时,将会产生流动于电感元件和电容元件之间的无功功率。变电站无功补偿是电网无功补偿的一个重要组成部分,也是电力系统安全生产的重要措施和保证。随着电网的迅速发展,电网设备越来越多,系统运行方式也更加复杂多变,大电网中的无功分布也更加复杂,电网无功补偿特别是变电站无功补偿的难度更大。另一方面,随着地方经济的不断发展,城乡居民的生活要求和维权意识不断提高,诸如多晶硅、氟化工等新型工业企业不断壮大,其特殊的生产工艺也决定了对较高电能质量的需求,这些都对电网无功补偿提出了新的更高的要求。目前变电站无功补偿主要的手段仍是投切电容器或电抗器,在某些情况下,这样的补偿方式已经不能完全满足电网智能型提升的要求。因此,针对变电所不同的无功分布和电压要求,研究智能性高、通用性强的无功补偿策略具有重要的理论和现实意义。本文致力于变电站无功补偿策略的研究工作,在总结国内外无功补偿技术发展现状的基础上,分析比较各种无功补偿装置的优缺点,并通过MATLAB软件分别对传统无功补偿装置和新型无功补偿装置进行仿真。最后,以220kV衢州变电所为例,进行无功补偿优化配置。针对变电站的接线方式和负荷性质进行研究,分析无功潮流分布情况,最终确定在现有的两组电容器基础上,加装两组电抗器和一台STATCOM,以STATCOM为主,在丰水期和枯水期分别与电容器和电抗器配合,实现全所的无功补偿的智能化拟合。更多还原

【Abstract】 Because of the existence of multiple capacitive load and inductive load, while active power is flowing, there will be the creation of reactive power between inductive cell and capacitive cell in electric power system. The reactive compensation of substation is an important component of the power grid’s reactive compensation, as well as the important safe conduct to the work safety of power grid. Along with rapid development of power grid, there are more devices, more complex operating mode of system and more complex reactive distribution in general power grid. In this case, the reactive compensation in power grid, especially the reactive compensation of substation is much more complex. On the other hand, with the continuous development of provincial economy, the consciousness of urban and rural residents in safeguarding their legal rights has been strengthened rapidly. There are some new industry enterprises emerging, such as polysilicon and flourien processing enterprise. Their special productive technology requires the higher power quality, which means we need new improvement on reactive compensation of power grid. At the present, the main method of reactive compensation of substation is still the switching of capacitor or reactor. Under some circumstances, this method can not fully meet the requirement of the intelligence enhance of power grid. Therefore, the different reactive distribution and voltage requirements for substation, as well as the study high intelligent and the versatile method of reactive compensation are very theoretically and practically important.Summarizing the universal reactive compensation technology development and analyzing the compare of the relative merits of different reactive compensation, through the simulation of traditional reactive compensation and new reactive compensation system from the software MATLAB, this paper aims at the study of the method of reactive compensation of substation. In the end, for instance, we optimized the reactive compensation of Quzhou 220k Voltage Substation. The mentioned method of reactive compensation is analyzing the reactive compensation status of busbar and each line, confirming the users’requirements and reactive compensation requirements of each line, and then deploying different reactive compensation respectively. After all this, we can confirm the method of reactive compensation and achieve the intelligentize fitting of reactive compensation of substation.更多还原