统一潮流控制器潮流控制策略及选址定容研究

发布时间：2018-05-03 11:04

本文选题：统一潮流控制器 + 变参数PI自整定控制　；参考：《重庆大学》2014年硕士论文

【摘要】：电力系统已进入大系统、超高压远距离输电、跨区域联网的新阶段，社会经济的发展促使现代电网的运行方式和管理发生变革，对其安全、稳定、高效、灵活的潮流控制要求日益提高。柔性交流输电系统（FACTS）的提出与发展，各种补偿技术的实现，极大的改善了电力系统的潮流控制能力。统一潮流控制器（UPFC）作为柔性交流输电家族中最复杂也是最有吸引力的一种补偿器，能够对电力线路上的阻抗、相角及有功和无功进行任意组合控制，灵活性很强，自提出以来便得到电力工业界的广泛关注。本文主要从改进UPFC串联变换器的潮流控制器与UPFC选址定容两方面进行研究。本文首先简要介绍了统一潮流控制器的应用及研究现状，分析讨论UPFC的基本结构和工作原理，并对其并联侧变换器和串联侧变换器分别进行数学建模和控制原理的阐述。之后对UPFC的主要参数，尤其是直流侧电容的选取原则进行了总结。其次，为了改进串联侧控制器的控制效果，分析并推导了其有功和无功潮流的传递函数，设计了一种变参数PI自整定控制器，，采用粒子群算法对控制器参数进行寻优。在MATLAB/SIMULINK中建立单机无穷大系统模型仿真，结果表明所改进的控制方法与常规的PI控制相比，具有快速调节线路潮流，提高系统暂态稳定性的功能。最后，介绍线路有功潮流性能指数的概念，利用线路有功功率对UPFC注入电压幅值和相角的灵敏度大小来确定其最佳安装位置，并在IEEE14节点系统中利用该方法寻找最佳安装位置。对建立UPFC投资成本和收益函数的方法进行介绍，并以经济收益最大化为目标，利用鱼群算法寻找到UPFC的安装容量。
[Abstract]:The power system has entered a new stage of large-scale system, ultra-high voltage long-distance transmission, cross-regional interconnection, and the development of social economy has promoted the transformation of the operation mode and management of modern power grid, which is safe, stable and efficient. Flexible power flow control is increasingly required. With the development of flexible AC transmission system (facts) and the realization of various compensation technologies, the power flow control ability of power system has been greatly improved. UPFC (Unified Power flow Controller) is the most complex and attractive compensator in the flexible AC transmission family. It can control impedance, phase angle, active and reactive power on power lines arbitrarily, and has strong flexibility. It has been widely concerned by the electric power industry since it was put forward. In this paper, the power flow controller of improved UPFC series converter and the location of UPFC are studied. This paper first introduces the application and research status of unified power flow controller, analyzes and discusses the basic structure and working principle of UPFC, and describes the mathematical modeling and control principle of parallel side converter and series side converter respectively. Then the main parameters of UPFC, especially the selection principle of DC side capacitance are summarized. Secondly, in order to improve the control effect of the series side controller, the transfer function of the active and reactive power flow is analyzed and deduced, and a Pi self-tuning controller with variable parameters is designed. The particle swarm optimization algorithm is used to optimize the controller parameters. The simulation results of a single machine infinite bus system model in MATLAB/SIMULINK show that the improved control method has the function of fast regulating the line power flow and improving the transient stability of the system compared with the conventional Pi control. Finally, the concept of line active power flow performance index is introduced. The sensitivity of line active power to UPFC injection voltage amplitude and phase angle is used to determine the optimal installation position, and the optimal installation position is found in IEEE14 node system. This paper introduces the method of establishing the UPFC investment cost and income function, and aiming at maximizing the economic benefit, finds out the installation capacity of UPFC by using the fish swarm algorithm.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.2

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