电力市场环境下微网经济运行
发布时间：2019-03-08 20:16
【摘要】：随着我国经济建设的持续发展,电力行业的垄断式经营方式不能适应电力工业的发展要求,为此,世界各国都在大力推进电力市场改革,引入竞争机制。与此同时,传统的集中供电方式不能够满足国民生产生活的用电需求,加上全球能源问题与环境压力的不断增大,利用可再生能源发电、有效提高能源利用效率的分布式发电技术应运而生,而单一的分布式电源并网运行会对大电网的稳定性产生不利影响。为解决这一矛盾,国内外专家们提出了微网,通过微网的能量管理,以协调分布式电源与配电网的运行方式。对构成微网的不同分布式电源进行了研究,分析了分布式电源发电的技术特点,并建立其功率特性的数学模型。结合风、光等自然因素的统计模型,建立了风力发电、光伏发电出力模型;通过对热电联供系统的分析,根据以热定电的原则,确定微型燃气轮机的出力下限;考虑蓄电池的使用寿命,提出蓄电池充放电过程中的条件约束。在深入研究电力市场的基础上,分析了电力市场与微网在电力工业发展进程中的相互影响。配电公司通过调整交易电价进行需求侧管理,刺激和鼓励用户改变消费行为和用电方式,减少电量消耗和电力需求;作为电力价格的需求侧响应,微网通过对分布式电源与储能装置的有效控制,调整峰谷时段的交易电量,在实现自身经济利益的同时,改善配电网的功率波动。通过分析电力市场环境中的微网运行成本,建立考虑合约期经济利益的微网能量管理数学模型,在目标函数中引入随机变量。根据置信区间的概念,建立基于置信区间的优化模型,说明了不同随机变量的处理方法,并提出变置信区间的优化思想。最后通过仿真算例进行验证,证明优化方法的有效性,能够解决电力市场环境下的微网能量管理问题。
[Abstract]:With the sustainable development of China's economic construction, the monopoly management mode of electric power industry can not meet the requirements of the development of electric power industry. Therefore, all the countries in the world are pushing forward the reform of electric power market and introducing the competition mechanism. At the same time, the traditional centralized mode of power supply cannot meet the needs of national production and life, coupled with the increasing global energy problems and environmental pressures, and the use of renewable energy to generate electricity, Distributed power generation technology, which can effectively improve energy utilization efficiency, emerges as the times require, and single distributed power supply connected to the grid will have an adverse impact on the stability of the large power grid. In order to solve this contradiction, experts at home and abroad put forward micro-grid, through the energy management of micro-grid, to coordinate the operation mode of distributed power supply and distribution network. This paper studies the different distributed power sources which constitute the micro-grid, analyzes the technical characteristics of the distributed power generation, and establishes the mathematical model of its power characteristics. Combined with the statistical model of natural factors such as wind and light, the output model of wind power generation and photovoltaic power generation is established, and the lower limit of output of micro gas turbine is determined according to the principle of heat and electricity determination through the analysis of the co-generation system of heat and power. Considering the service life of battery, the condition constraint in the process of battery charging and discharging is put forward. Based on the in-depth study of the power market, the interaction between the power market and the micro-grid in the development of the electric power industry is analyzed. The power distribution company carries on the demand side management through the adjustment transaction price, stimulates and encourages the user to change the consumption behavior and the power consumption way, reduces the electricity consumption and the electricity demand; As the demand-side response of electricity price, micro-grid can adjust the trading quantity during peak-valley period by controlling the distributed power supply and energy storage device effectively, so as to realize its own economic benefit and improve the power fluctuation of distribution network at the same time. By analyzing the operating cost of micro-grid in power market environment, a mathematical model of micro-grid energy management considering the economic benefits of contract period is established, and random variables are introduced into the objective function. According to the concept of confidence interval, the optimization model based on confidence interval is established. The processing methods of different random variables are explained, and the optimization idea of variable confidence interval is put forward. Finally, a simulation example is given to verify the effectiveness of the optimization method, which can solve the energy management problem of micro-grid in the environment of power market.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732
[Abstract]:With the sustainable development of China's economic construction, the monopoly management mode of electric power industry can not meet the requirements of the development of electric power industry. Therefore, all the countries in the world are pushing forward the reform of electric power market and introducing the competition mechanism. At the same time, the traditional centralized mode of power supply cannot meet the needs of national production and life, coupled with the increasing global energy problems and environmental pressures, and the use of renewable energy to generate electricity, Distributed power generation technology, which can effectively improve energy utilization efficiency, emerges as the times require, and single distributed power supply connected to the grid will have an adverse impact on the stability of the large power grid. In order to solve this contradiction, experts at home and abroad put forward micro-grid, through the energy management of micro-grid, to coordinate the operation mode of distributed power supply and distribution network. This paper studies the different distributed power sources which constitute the micro-grid, analyzes the technical characteristics of the distributed power generation, and establishes the mathematical model of its power characteristics. Combined with the statistical model of natural factors such as wind and light, the output model of wind power generation and photovoltaic power generation is established, and the lower limit of output of micro gas turbine is determined according to the principle of heat and electricity determination through the analysis of the co-generation system of heat and power. Considering the service life of battery, the condition constraint in the process of battery charging and discharging is put forward. Based on the in-depth study of the power market, the interaction between the power market and the micro-grid in the development of the electric power industry is analyzed. The power distribution company carries on the demand side management through the adjustment transaction price, stimulates and encourages the user to change the consumption behavior and the power consumption way, reduces the electricity consumption and the electricity demand; As the demand-side response of electricity price, micro-grid can adjust the trading quantity during peak-valley period by controlling the distributed power supply and energy storage device effectively, so as to realize its own economic benefit and improve the power fluctuation of distribution network at the same time. By analyzing the operating cost of micro-grid in power market environment, a mathematical model of micro-grid energy management considering the economic benefits of contract period is established, and random variables are introduced into the objective function. According to the concept of confidence interval, the optimization model based on confidence interval is established. The processing methods of different random variables are explained, and the optimization idea of variable confidence interval is put forward. Finally, a simulation example is given to verify the effectiveness of the optimization method, which can solve the energy management problem of micro-grid in the environment of power market.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732
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