【作者】 李永强；

【导师】 周勇；

【作者基本信息】 郑州大学 ， 电力系统及其自动化， 2009， 硕士

【摘要】 无源滤波器在电网谐波治理和无功补偿中担任着重要的角色,它具有结构简单、设备投资少、运行可靠性高、运行费用低等优点,成为电力系统中最普遍的谐波抑制设备。本文针对电网中普遍使用的无源滤波器参数设计进行了深入研究。分析了单调谐波滤波器、高通滤波器的结构型式和工作原理;详细研究了等值频偏、无功补偿容量、调谐锐度、截止频率等参数对无源滤波器性能的影响;分析了系统谐波阻抗的确定及系统谐波阻抗与滤波器性能的关系。对无源滤波器参数设计的工程设计方法进行研究。介绍了最小电容安装容量法、无功补偿容量分配法、过电压限制法等。此外,还介绍了一种以过电压、过电流和容量平衡三个校验条件为依据的无源滤波电容器参数选择的综合性方法,并从多方面综合分析了无功补偿、滤波效果和滤波器参数选择之间的关系。研究证明了滤波器参数工程设计法的可行性。对无源滤波器参数设计的优化方法进行了深入的研究,并提出了利用基于并列选择法的遗传算法实现无源滤波器参数的多目标优化设计。分析并给出了无源滤波器优化设计问题的数学描述,由此得出等式约束条件和不等式约束条件并构造出适应度函数。在此基础上,得到基于并列选择法的遗传算法求解滤波参数的程序流程图。通过建立无源滤波器的仿真模型,对无源滤波器的工程设计方法和多目标优化算法进行对比分析,验证了优化算法更具有优越性和有效性。更多还原

【Abstract】 In power systems, passive filter plays an important role in harmonic control and reactive power compensation. Passive filter with simple structure, low-cost, high reliability, low operating costs was generally used as harmonic suppression equipment in power systems. In this essay, parameter design of passive filter in power systems was deeply researched.Structure and working principle of single-tuned filter and high-pass filter were studied. The influence on passive filter performance related to frequency deviation, reactive power compensation capacity, tuning sharpness and cut-off frequency was researched in detail. How to decide system harmonic impedance and the relationship between system harmonic impedance and passive filter performance were analyzed.Engineering design of passive filter parameters was researched. The paper presents minimal capacitor installed capacity method, reactive power allocating method and over-voltage limitation method. In addition, an integrated approach based on the three verification conditions of overvoltage, overcurrent and capacity balance was given. The relationship between the reactive power compensation, filtering efficiency and passive filter parameters selection was analyzed synthetically. The feasibility of engineering design of passive filter parameters was proved.Optimization method of passive filter parameters was studied. Parallel selection method base on genetic algorithm was proposed to optimized parameters of passive filter. Mathematical description, conditions of equality constraints, inequality constraints and fitness function of passive filter optimization method were given. On this basis, flow chart of parallel selection method base on genetic algorithm can be obtained to optimize parameters of passive filter.In this essay, Simulation model of passive filter was established. Engineering design and optimization method of passive filter were analyzed comparatively and it’s proved that optimization method of passive filter has better quality and more effective.更多还原