电力系统有关稳定性与优化问题研究

发布时间：2018-02-08 22:05

本文关键词： 电力系统鲁棒控制执行故障优化算法　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：电力工业是国民经济和社会发展的基础产业。电力系统运行的安全性与稳定性直接关系到工业生产和日常生活的正常进行,其运行的经济性将影响社会经济效益。随着科学技术的进步,现代电力系统正朝着大容量、超高压、广域连接的方向发展,其组成结构也日趋复杂,对电力系统的安全、稳定、经济产生重大的影响。本文研究了电力系统的功角与电压励磁控制器的设计与分布式发电中负荷分配优化问题。主要工作如下:首先,本文研究了单机无穷大电力系统的暂态及电压稳定问题。区别于过去暂态稳定控制与电压稳定控制分开进行的作法,本文提出一种单机无穷大电力系统综合励磁控制策略设计方法,通过调节的励磁控制输入达到对输出功角和终端电压的同时控制。基于以上考虑,我们将功角和终端电压同时作为反馈状态量,运用直接反馈线性化方法,对整个单机无穷大电力系统进行建模,获得了更加完善的单机无穷大电力系统控制模型。在此模型基础上我们考虑了执行器故障对单机无穷大电力系统稳定控制的影响,研究了执行器故障下的功角与终端电压稳定控制器设计方法,运用稳定性理论验证了该方法的有效性,并给出了计算机仿真。其次,本文研究了针对分布式发电中经济负荷优化分配问题。经济负荷优化分配是在满足电力需求与供给平衡下,优化分配发电机的负荷,使得总发电成本最优化、用电收益最大化的过程。区别于传统的动态规划方法,本文提出了分布式发电一致性优化分配算法,该算法将增量成本作为一致性变量,电网电力的供需差作为反馈变量,通过保证增量成本的一致来完成电网供需平衡下的负荷优化分配。我们通过分析该算法比例增益参数取值与一致收敛性关系,得到了算法收敛到最优解的充分条件,最后通过计算机仿真验证了该算法的有效性。
[Abstract]:Electric power industry is the basic industry of national economy and social development. The safety and stability of power system operation are directly related to the normal development of industrial production and daily life. With the progress of science and technology, the modern power system is developing towards the direction of large capacity, ultra-high voltage and wide area connection, and its composition structure is becoming more and more complex, which is safe and stable for the power system. The design of power angle and voltage excitation controller in power system and the optimization of load distribution in distributed generation are studied in this paper. The main work is as follows: first of all, In this paper, the transient and voltage stability problems of a single machine infinite power system are studied. In this paper, a design method of integrated excitation control strategy for a single machine infinite power system is proposed, which can control the output power angle and terminal voltage simultaneously by adjusting the excitation control input. In this paper, the power angle and terminal voltage are taken as the feedback state variables at the same time, and the direct feedback linearization method is used to model the whole single-machine infinite power system. A more perfect control model of single machine infinite power system is obtained. Based on this model, the effect of actuator fault on the stability control of single machine infinite power system is considered. The design method of power angle and terminal voltage stability controller under actuator fault is studied. The validity of the method is verified by using the stability theory, and the computer simulation is given. In this paper, the optimal distribution of economic load in distributed generation is studied. The optimal allocation of economic load is to optimize the load distribution of generators in order to optimize the total generation cost under the condition of satisfying the balance of power demand and supply. Different from the traditional dynamic programming method, this paper proposes a distributed generation consistency optimization allocation algorithm, which takes incremental cost as consistency variable and power supply and demand difference as feedback variable. By ensuring the consistency of incremental cost, the optimal load distribution under the balance of power supply and demand is achieved. By analyzing the relation between the proportional gain parameter of the algorithm and the uniform convergence, a sufficient condition for the algorithm to converge to the optimal solution is obtained. Finally, the effectiveness of the algorithm is verified by computer simulation.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM712

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