含抽水蓄能电站的电网负荷频率控制系统研究

发布时间：2018-01-08 11:00

本文关键词：含抽水蓄能电站的电网负荷频率控制系统研究　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着电网规模的日益扩大,电网的运行环境也呈现出复杂化的趋势,电网日常运行的安全性和出现扰动后的稳定性问题越来越受人们重视。而坚强智能电网的建设,特高压联网的推进导致电网外受电电力不断增加,大受端电网特征日益明显,增强面对突发大规模电力缺失的紧急事故处理能力已迫在眉睫。抽水蓄能电站是目前已在电网中应用的一种较成熟的储能技术,对电网的日常运行起到了很大的作用。随着电网规模的扩大和运行环境的日益复杂,抽水蓄能电站在原有作用的基础上有能力承担更大的责任,故需要对抽水蓄能电站的运营模式进行进一步的研究。本文立足于抽水蓄能电站,对其在电力系统日常运行中的负荷频率控制及紧急状态下的功率支援进行了研究,所做的主要工作如下:(1)总结了传统负荷频率控制系统模型中常见的元件,建立单区域负荷频率控制的传递函数及状态空间模型。分析了传统线性模型的不足之处,基于对电力系统非线性环节的分析,建立了考虑非线性的两区域再热式汽轮机组模型。(2)对抽水蓄能电站的工作模式进行分析,区分为发电工况和抽水工况,对应不同的工况分别建立了抽水蓄能电站的模型。结合抽水蓄能电站及区域负荷频率控制的模型提出了含抽水蓄能电站的区域负荷频率控制模型。针对该模型对不同机组设计了相应的控制器,通过仿真研究验证了电网负荷频率控制系统中加入抽水蓄能电站后,频率变化减小,恢复速度加快,动态特性变好。(3)针对当前电力系统直流紧急功率支援系统的不足之处,以阶梯式抽水蓄能电站模型为基础构建了抽水蓄能电站紧急功率支援系统。对支援系统的启动条件,功率分配过程,退出过程进行了设计,形成了抽水蓄能电站紧急功率支援系统的整个执行过程。通过多电站的联合试验验证了整个系统逻辑的正确性,为抽水蓄能电站紧急功率支援系统的实际应用打下了基础。
[Abstract]:With the increasing scale of power grid, power grid operation environment also showed a complex trend, the daily operation of the power grid security and stability problem of disturbance after more and more attention by people. While the strong smart grid construction, especially to promote networking caused by high power electric power increasing, increasingly large receiving end grid features obviously, in the face of enhancing emergency handling capabilities of sudden large-scale power loss is imminent. The pumped storage power station is a relatively mature reservoir has been applied in the grid technology, the daily operation of the power grid has played a very important role. With the expansion of power grid and operating environment is increasingly complex, pumped storage based on the original function of the power plant have the ability to assume greater responsibility, so the need for pumped storage power station operation mode to carry out further research. This paper is based on the pumped storage Can the power plant to power its support in the daily operation of the power system load frequency control and under the state of emergency was studied, the main work is as follows: (1) summarizing the traditional load frequency control element common system model, the establishment of a single regional load frequency control transfer function and state space model. Analysis of the shortcomings of the traditional linear model, the nonlinear analysis of part of the power system based on the established model of two regional reheat steam turbine (2). Considering the nonlinear analysis of pumped storage power station work mode, divided into generating condition and pumping condition, corresponding to different conditions were established for Pumped Storage power station the model combined with pumped storage power station and load frequency control model proposed regional load frequency control model of pumped storage power station. According to the design of the model of machine group The corresponding controller, the simulation results demonstrate that the grid load frequency control system in pumped storage power station, the frequency change decreases and the recovery speed, the dynamic characteristics of good. (3) aiming at the deficiencies of current power system emergency DC power support system, with a ladder pumped storage power plant model of pumped storage power station emergency power support system based on energy storage. Starting conditions on the support system, power allocation process, from the design process, the formation of pumped storage power stations throughout the implementation process of emergency power support system. Through the joint test station to verify the correctness of the system logic, for Pumped Storage Foundation the actual application of emergency power support system of power plant.

【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV743;TM732

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