10kV农村配电网无功补偿及电压调节措施的研究
发布时间：2018-10-12 06:25
【摘要】：农村电网功率因数较低,并随着近年来大量非线性负荷的使用,谐波问题越来越严重。本文就农村电网无功功率的补偿及电压调节、谐波治理展开了分析,并给出了相应的解决方法。首先就内蒙古包头市九原地区的农网现状展开了介绍,其中包括农网改造建设的情况,改造建设后仍旧存在的一些问题,以及脑包所所管辖下的10kV线路的谐波测试数据,并对该地区的谐波进行了简要的分析；针对该地区线路电压偏低的问题,给出了所采取的措施,包括采用并联电容器进行无功补偿,提高功率因数、减小线损以及提高末端电压。然后就无功补偿的原理、作用以及无功补偿的分类和补偿装置的配置原则展开了分析和讨论,给出了采用并联电容器进行无功补偿时补偿容量的计算方法,并对无功补偿装置合适的补偿点展开了分析,给出了无功补偿点确定的相应原则。针对农网中所存在的谐波问题,在进行并联电容器中串联电抗率的选择时,给出了相应的选择方法,以及给出了在进行不同串抗率的配比时,不同串联电抗率组数的确定方法。最后针对10kV农网电压偏低的问题,介绍了一种较新颖的电压调节方法—晶闸管电压调节器TVR。对TVR的应用背景、工作原理以及主电路的选择进行了阐述,对TVR电压的检测方法和控制策略进行了分析和讨论,其中就电压的检测给出了新的检测方法；最后建立了仿真模型进行了仿真分析,证明了此种调节方法的切实可行性。最后对TVR调压和电容器无功补偿调压从多个方面进行了对比分析,指出了TVR调压相对于电容器的一些优势。
[Abstract]:The power factor of rural power network is low, and with the use of a large number of nonlinear loads in recent years, the harmonic problem is becoming more and more serious. In this paper, the reactive power compensation and voltage regulation of rural power network and harmonic control are analyzed, and the corresponding solutions are given. First of all, the paper introduces the current situation of rural power network in Jiuyuan area of Baotou City, Inner Mongolia, including the situation of rural power network reconstruction and construction, some problems that still exist after the reconstruction construction, and the harmonic testing data of 10kV line under the jurisdiction of Naobao. The harmonics in this area are analyzed briefly, and the measures taken to solve the problem of low line voltage are given, including the use of shunt capacitors for reactive power compensation and the improvement of power factor. Reduce line loss and increase terminal voltage. Then the principle of reactive power compensation, the function, the classification of reactive power compensation and the configuration principle of compensator are analyzed and discussed, and the calculation method of compensation capacity when using shunt capacitor to compensate reactive power is given. The appropriate compensation points of the reactive power compensator are analyzed, and the corresponding principles for determining the reactive power compensation points are given. Aiming at the harmonic problem in rural power network, the selection method of series reactance in parallel capacitor is given, and the method of determining the number of different series reactance ratio in different ratio of series reactance is given. Finally, aiming at the problem of low voltage in 10kV rural network, a novel voltage regulation method-thyristor voltage regulator (TVR.) is introduced. The application background, working principle and selection of main circuit of TVR are expounded. The detection method and control strategy of TVR voltage are analyzed and discussed, and a new detection method for voltage detection is given. Finally, the simulation model is established and the feasibility of this method is proved. Finally, TVR voltage regulation and capacitor reactive power compensation voltage regulation are compared and analyzed from many aspects, and some advantages of TVR voltage regulation over capacitors are pointed out.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12
，
本文编号：2265110
[Abstract]:The power factor of rural power network is low, and with the use of a large number of nonlinear loads in recent years, the harmonic problem is becoming more and more serious. In this paper, the reactive power compensation and voltage regulation of rural power network and harmonic control are analyzed, and the corresponding solutions are given. First of all, the paper introduces the current situation of rural power network in Jiuyuan area of Baotou City, Inner Mongolia, including the situation of rural power network reconstruction and construction, some problems that still exist after the reconstruction construction, and the harmonic testing data of 10kV line under the jurisdiction of Naobao. The harmonics in this area are analyzed briefly, and the measures taken to solve the problem of low line voltage are given, including the use of shunt capacitors for reactive power compensation and the improvement of power factor. Reduce line loss and increase terminal voltage. Then the principle of reactive power compensation, the function, the classification of reactive power compensation and the configuration principle of compensator are analyzed and discussed, and the calculation method of compensation capacity when using shunt capacitor to compensate reactive power is given. The appropriate compensation points of the reactive power compensator are analyzed, and the corresponding principles for determining the reactive power compensation points are given. Aiming at the harmonic problem in rural power network, the selection method of series reactance in parallel capacitor is given, and the method of determining the number of different series reactance ratio in different ratio of series reactance is given. Finally, aiming at the problem of low voltage in 10kV rural network, a novel voltage regulation method-thyristor voltage regulator (TVR.) is introduced. The application background, working principle and selection of main circuit of TVR are expounded. The detection method and control strategy of TVR voltage are analyzed and discussed, and a new detection method for voltage detection is given. Finally, the simulation model is established and the feasibility of this method is proved. Finally, TVR voltage regulation and capacitor reactive power compensation voltage regulation are compared and analyzed from many aspects, and some advantages of TVR voltage regulation over capacitors are pointed out.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12
，
本文编号：2265110
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