抽水蓄能-核电-风电联合调峰控制策略研究

发布时间：2018-03-15 22:22

本文选题：核电　切入点：风电　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着经济的发展、风力发电等不可调度性资源的大规模接入以及核电机组并网容量的不断增加,电网中的负荷峰谷差也逐年增大,使以火电机组为调峰主体的电网调峰压力更加严峻。另外,受电源结构限制和供热需求的影响,电网的低谷调峰能力有限,弃风、弃核问题日益严重,给电网安全和高比例新能源的消纳带来很大困难,急需新的调峰电源和手段。随着核电的应用,大规模风电的开发,如何有效利用调峰电源,展开核电机组参与系统调峰运行的研究应用和以抽水蓄能-核电-风电为核心的联合调峰控制策略研究将是解决电网调峰问题的有效途径之一,以往的研究集中体现在典型日的风火、风蓄和核蓄的联合运营,没有在风电接入的以实际电网规划角度进行抽水蓄能-核电-风电的大电网调峰平台搭建和联合调峰控制策略的提出。针对以上问题,本文以某省电网风电大规模接入,抽水蓄能的缺少,核电运营和不断规划,弃风的严重,一次如何展开抽水蓄能-核电-风电联合调峰控制为成为了消纳某省风电的重大问题,首先根据不同调峰电源的调峰运行特性,阐述其调峰成本的计算,并分析了风力发电能源的反调峰性;其次根据某省电网实际网架结构和参数,在PSCAD平台下搭建省级大电网模型,从而构建了联合调峰运行仿真平台,为了使结果更加有效性,网内对火电机组、风力发电机组、核电机组、抽水蓄能机组、高压直流输电、柔性直流输电系统、线路、变压器、无功补偿、外网等值模型的数学模型和控制模型进行了详细阐述;然后基于核电机组可以一定程度参与电网调峰的前提,在节能调度要求下,寻求各机组在1天内各个时间段的调峰手段组合,以保证全天96点总的运行费用最小,研究现有装机水平下典型日内核电参与调峰以增加风电消纳量;最后兼顾公司与社会效益,以等年值综合成本最低为优化目标,建立抽蓄-核电-风电的联合规划模型,以得到三种电源的最优规划装机容量,以2020年规划水平下进行算例验证,并研究了抽蓄装机、风电装机、核电装机、弃风率之间的关系。
[Abstract]:With the development of economy, the large-scale access of non-dispatch resources such as wind power generation and the increasing of power units' grid-connected capacity, the load peak-valley difference in the power network increases year by year. The peak-shaving pressure of power grid with thermal power unit as the main part of peak-shaving is more severe. In addition, due to the limitation of power supply structure and the demand for heating, the power grid has limited ability to adjust the peak at the bottom of the grid, and the problem of abandoning wind and nuclear energy is becoming more and more serious. With the application of nuclear power, the development of large-scale wind power, how to effectively utilize peak-shaving power supply, It will be one of the effective ways to solve the peak-shaving problem of power grid by developing the research and application of the nuclear power unit participating in the peak-shaving operation of the system and the research of the combined peak-shaving control strategy with pumped storage, nuclear power and wind power as the core. Previous studies have focused on the combined operation of wind and fire, wind storage and nuclear storage in typical days. In view of the above problems, this paper presents a large power grid peak-shaving platform and a combined peak-shaving control strategy based on the actual power network planning, which is not connected with wind power. The lack of pumped storage, the operation and continuous planning of nuclear power, and the serious abandonment of wind, how to develop the joint peak shaving control of pumped storage, nuclear power and wind power at a time has become a major problem in absorbing wind power in a certain province. First, according to the peak-shaving operation characteristics of different peak-shaving power supply, the calculation of peak-shaving cost is expounded, and the anti-peak-shaving property of wind power generation energy is analyzed. In order to make the results more effective, the model of provincial power grid is built under PSCAD platform, and the simulation platform of combined peak-shaving operation is constructed. In order to make the results more effective, the network is designed for thermal power units, wind turbines, nuclear power units, pumped storage units, high-voltage direct current transmission units. The mathematical model and control model of flexible direct current transmission system, line, transformer, reactive power compensation, external network equivalent model are elaborated in detail. Then, based on the premise that nuclear power unit can participate in power grid peak shaving to some extent, Under the requirement of energy-saving dispatching, this paper seeks the combination of peak-shaving means of each unit in each period of one day to ensure that the total operating cost of 96 points per day is the minimum. The typical intra-day nuclear power plants are involved in peak-shaving at the existing installed level to increase the wind power consumption. Finally, considering the company and social benefits, taking the lowest comprehensive cost of equal annual value as the optimization goal, the joint planning model of pumped storage, nuclear power and wind power is established to obtain the optimal planned installed capacity of the three kinds of power supply. Based on the example of 2020 planning level, the relationship between pumped storage machine, wind power plant, nuclear power plant and air rejection rate is studied.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM61;TM73

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