充分利用风电的蒙西电网电量交易方案研究

发布时间：2019-06-25 18:13

【摘要】：依靠内蒙古自治区丰富的风能资源和国家能源政策的引导，大规模的风电接入到内蒙古西部电网（简称，蒙西电网）中运行，不仅有效地缓解了电力供应的紧张，也极大地促进了新能源技术的发展。但风电的随机性与波动性，导致电网在火电可调范围有限和以高载能负荷为主的地区负荷电量需求大的情况下，很难安排运行方式，甚至在负荷低谷期间弃风、在负荷高峰期降低外送电力。因此如何建立合理的、简单易行的风电、火电和高载能负荷电量交易方案，，从而兼顾风电、火电、高载能负荷和电网各方利益，是需要研究的问题。本文综合考虑了风电的运行成本、火电机组的启停费用和高载能负荷的电价补贴等影响电量交易的关键因素，进行了基于大规模风电接入的蒙西电网风电、火电和高载能负荷电量交易的探索研究，主要内容和结果如下：（1）分析了蒙西电网的地区负荷、风电运行的特点。介绍了蒙西电网的生产运行现状，如发供电负荷、峰谷差、断面限制和外送电力等情况，分析了蒙西电网电力供需平衡所存在的问题。介绍了蒙西电网的风能能源的基本情况，基于概率统计方法给出了蒙西电网风电的运行规律。分析了大规模风电接入对系统电压、系统稳定的影响和所存在的问题。（2）研究了风电、火电和高载能负荷之间电量交易的可行性问题。通过分析风电的前期投资和生产维护成本、火电的正常运行成本和启停费用、高载能负荷的发展困境，初步探索了风电、火电和高载能负荷之间电量交易的前提条件。介绍了蒙西电网的风电数值预测系统，并利用实际采样的数据分析了系统的预测精度。基于蒙西电网的高精度风电预测能力，给出了风电、火电和高载能负荷之间进行电量交易可以兼顾各方利益并带来巨大经济、社会效益的结论。（3）研究了风电、火电和高载能负荷之间电量交易的设计问题。提出了一种风电与火电之间的电量交易方案，即火电机组通过启停提供调峰服务并获得风电的经济补偿，以避免蒙西电网在负荷高峰期降低外送电量。提出了一种风电与高载能负荷之间的电量交易方案，即高载能负荷作为备用负荷消纳负荷低谷期的风电并获得风电的经济补偿，以避免蒙西电网在负荷低谷期弃风。提出了一种风电、火电和高载能负荷之间的电量交易方案，即高载能负荷、火电和风电在风电预测通告后进行相互报价和电量交易。通过算例分析说明了所提电量交易的有效性。
[Abstract]:Relying on the rich wind energy resources and the guidance of national energy policy in Inner Mongolia Autonomous region, large-scale wind power is connected to the western Inner Mongolia power grid (abbreviated as Mengxi Power Grid), which not only effectively alleviates the shortage of power supply, but also greatly promotes the development of new energy technology. However, the randomness and fluctuation of wind power make it difficult to arrange the operation mode under the condition that the adjustable range of thermal power is limited and the demand of load electricity is large in the area with high load, and even abandon the wind during the load trough and reduce the outgoing power during the peak period of load. Therefore, how to establish a reasonable and simple trading scheme of wind power, thermal power and high load electricity, so as to take into account the interests of wind power, thermal power, high load and the interests of all parties in the power grid, is a problem that needs to be studied. In this paper, the operation cost of wind power, the start and stop cost of thermal power units and the electricity price subsidy of high load are considered synthetically, and the exploration and research of wind power, thermal power and high load electricity transaction of Mengxi power grid based on large-scale wind power access are carried out. the main contents and results are as follows: (1) the regional load of Mengxi power grid and the characteristics of wind power operation are analyzed. This paper introduces the present situation of production and operation of Mengxi power grid, such as generating and supplying load, peak and valley difference, section restriction and outgoing power, etc., and analyzes the problems existing in the balance of power supply and demand in Mengxi power grid. This paper introduces the basic situation of wind energy in Mengxi power grid, and gives the operation law of wind power in Mengxi power grid based on probability and statistics method. The influence of large-scale wind power access on system voltage and system stability and the existing problems are analyzed. (2) the feasibility of electricity trading between wind power, thermal power and high load is studied. Based on the analysis of the upfront investment and production and maintenance cost of wind power, the normal operation cost and start-up cost of thermal power, and the development predicament of high load, the prerequisites of electricity transaction between wind power, thermal power and high load are preliminarily explored. The wind power numerical prediction system of Mengxi power grid is introduced, and the prediction accuracy of the system is analyzed by using the actual sampled data. Based on the high precision wind power forecasting ability of Mengxi power grid, it is concluded that the transaction between wind power, thermal power and high energy load can take into account the interests of all parties and bring great economic and social benefits. (3) the design of power transaction between wind power, thermal power and high load is studied. In this paper, a power trading scheme between wind power and thermal power is proposed, that is, thermal power units provide peak shaving service through start and stop and obtain economic compensation for wind power, in order to avoid the reduction of external power transmission in Mengxi power grid during the peak load period. In this paper, a power trading scheme between wind power and high energy load is proposed, that is, the high load is used as the standby load to absorb the wind power in the trough period and obtain the economic compensation of wind power, so as to avoid the abandonment of wind in the low load period of Mengxi power grid. In this paper, a power trading scheme between wind power, thermal power and high load is proposed, that is, high load, thermal power and wind power quote and trade each other after wind power forecast announcement. The effectiveness of the proposed electricity transaction is illustrated by an example.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：F426.61;TM61

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