基于电网输电断面约束的风—火电耦合控制策略研究

发布时间：2018-07-03 18:42

本文选题：输电断面 + 风-火电耦合控制　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：近些年来,随着污染加重、温室效应加剧,我国的电力发展把重心投向了建设大规模风电场。但由于我国风电集中在三北地区,风电并不能够全部就地消纳,因此需要风-火电耦合打捆外送。然而,风电的波动性和随机性给大规模风电接入电网造成了输电断面功率波动性较大、利用率低以及弃风率较高等一系列问题。所以,研究基于输电断面约束的风-火电耦合控制策略具有重要的理论和现实意义。本文首先研究了输电断面的控制原则与方法,对大规模风电的功率运行特性进行了分析,然后论述了大规模风电接入电网对输电断面的输送功率产生的影响。其次,分析比较了风-火电解耦与耦合情况下输电断面的功率情况,得出风-火电耦合控制具有弃风率低,输电断面利用率高等优点。基于风电预测和调度计划方式,提出了基于两种时间尺度的风-火电耦合控制模式:日前长时间尺度控制模式和日内短时间尺度控制模式;以此为基础,建立了长时间尺度风-火电耦合控制多目标优化模型,并提出了多目标粒子群算法与模糊熵权法相结合的求解方法;基于日内短时间尺度,提出了风电预测误差修正方法。在此基础上,研究提出了日前长时间尺度下的风-火电耦合优化控制策略和日内短时间尺度的误差修正控制策略。最后,以陕北电网实际仿真数据为例,对基于电网输电断面约束的风-火电耦合控制策略进行仿真计算,验证了本文提出的控制策略的可行性与有效性。
[Abstract]:In recent years, with the aggravation of pollution and Greenhouse Effect, the development of electric power in China is focused on the construction of large-scale wind farms. But since wind power is concentrated in Sanbei area, wind power can not be completely absorbed on the spot, so wind and thermal power coupling bundles are needed. However, the volatility and randomness of wind power have caused a series of problems such as high power fluctuation of transmission section, low utilization rate and high wind abandonment rate. Therefore, it is of great theoretical and practical significance to study the wind-thermal power coupling control strategy based on transmission section constraints. This paper first studies the control principle and method of transmission section, analyzes the power operation characteristics of large-scale wind power generation, and then discusses the influence of large-scale wind power on the transmission power of transmission section. Secondly, the power of the transmission section under the condition of wind and thermal power decoupling and coupling is analyzed and compared. It is concluded that the wind-thermal power coupling control has the advantages of low abandoned wind rate and high transmission section utilization ratio. Based on wind power prediction and scheduling planning, this paper proposes two kinds of wind power coupled control models based on time scale: long time scale control model before day and short time scale control mode within day. The multi-objective optimization model of wind-thermal power coupling control with long time scale is established, and the method of solving multi-objective particle swarm optimization combined with fuzzy entropy weight method is proposed, and the method of correcting wind power prediction error is proposed based on the short-time scale in the day. On the basis of this, the wind-thermal power coupling optimal control strategy and the error correction control strategy for the short time scale of the day are proposed. Finally, taking the actual simulation data of Northern Shaanxi power grid as an example, the simulation calculation of the wind-thermal power coupling control strategy based on transmission section constraints is carried out, which verifies the feasibility and effectiveness of the proposed control strategy.
【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】：2017
【分类号】：TM61;TM732

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