计及风电的无功定价研究

发布时间：2019-01-18 10:09

【摘要】：近年来,风力发电以其清洁、可再生的特点在世界各国发展迅速。由于风力发电具有随机性,其运行时需吸收大量无功,因而随着风电装机容量增加,其并网后对电网的影响也日益突出。作为满足系统安全稳定运行的重要因素,无功一直没有受到应有的重视。随着我国电力体制改革深入,在电力市场中如何体现无功价值、回收无功成本的关键在于制定合理的无功电价。基于此,本文对风电接入后的无功定价方法进行了研究与探讨。本文首先总结了国内外已有的定价理论和风电并网后的潮流计算研究成果,并结合我国电力市场发展相对落后的现状,选取综合成本分摊法作为本文无功定价方法的理论基础。然后对系统中发电机、无功补偿设备的无功成本进行了分析,建立计算模型。对潮流追踪理论的原理、方法进行介绍与论证后,本文选取顺流潮流追踪作为确定无功成本分摊至各节点的系数的理论依据。随后,本文详细介绍了风电机组的特点、风电出力以及其并网后的最优潮流计算模型。最后,本文建立了以发电机和无功补偿设备有功和无功总运行成本最优为目标函数,通过蒙特卡洛随机模拟风电机组出力变化,在最优潮流计算结果基础上借助潮流追踪分析各无功负荷节点的无功功率来源,对各无功电源的成本合理分摊,并以IEEE30节点进行算例分析,验证了本文所提出的计及风电的无功定价模型的正确性与有效性。
[Abstract]:In recent years, wind power generation has developed rapidly all over the world because of its clean and renewable characteristics. Due to the randomness of wind power generation, it needs to absorb a large amount of reactive power during operation, so with the increase of wind power installed capacity, the influence of wind power grid is becoming more and more prominent. As an important factor to meet the safety and stability of the system, reactive power has not received due attention. With the deepening of China's power system reform, how to reflect the value of reactive power in the electricity market, the key to recover the reactive power cost lies in the formulation of reasonable reactive power price. Based on this, the reactive power pricing method after wind power access is studied and discussed in this paper. This paper first summarizes the existing pricing theory and the research results of power flow calculation after wind power is connected to the grid, and then selects the comprehensive cost allocation method as the theoretical basis of the reactive power pricing method in the light of the relatively backward development of the electricity market in our country. Then the reactive power cost of generator and reactive power compensation equipment in the system is analyzed and the calculation model is established. After introducing and demonstrating the principle and method of power flow tracing, this paper selects the downstream power flow tracing as the theoretical basis for determining the coefficient of reactive power cost allocation to each node. Then, this paper introduces the characteristics of wind turbine, wind power generation and the optimal power flow calculation model. Finally, taking the optimal total operation cost of generator and reactive power compensator as the objective function, the paper simulates the variation of wind turbine output force by Monte Carlo random simulation. Based on the results of optimal power flow calculation, the reactive power sources of each reactive power load node are analyzed by power flow tracing, and the cost of each reactive power supply is allocated reasonably, and an example is given to the IEEE30 node. The correctness and validity of the reactive power pricing model with wind power are verified.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：F426.61;TM614

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