基于GAMS的电力系统运行优化

发布时间：2018-04-01 13:24

本文选题：经济调度　切入点：直流最有潮流　出处：《华南理工大学》2014年硕士论文

【摘要】：随着人类对能源需求的不断提高，电能作为一种清洁的二次能源在我们日常生活中扮演着越来越重要的角色，电力需求的不断增加、电网规模的日渐扩大，这些给电力系统运行带来了新的挑战，电力系统运行的经济性作为现代电力系统运行必须满足的四个基本要求之一，一直是电力工作者和科研者潜心研究的课题，合理的电力系统运行优化手段会给全社会带来巨大的经济效和环保效益。首先，，本文建立电力系统经济调度的线性优划模型，并进行了误差分析，得出了分段割线线性化发电机二次耗量特性曲线产生的误差非常小的结论，并把这一结论应用到机组组合问题优化模型中去，还根据线性规划对偶原理的经济性意义分析了如何确定系统的最优电价。其次，建立非线性规划的电力系统直流最优潮流模型，模型是在标准的直流最优潮流模型的基础上增加了节点电压相角差的平方和这一惩罚项，得到一个严格凸二次规划问题，通过这一模型可以直接求解出节点注入的有功功率、支路潮流、节点边际电价以及节点电压相角差，同时得出不考虑网损的情况下输电线路的功率是系统发电机功率的线性组合。最后，建立了基于混合整数规划的电力系统机组组合问题的优化模型，模拟海南电网的能源结构同时考虑火电、水电、核电、风电、气电以及抽水蓄能六种机组，分析了拉格朗日松弛法、分支界定法和割平面法原理，再利用前两个模型得到的结论，以实际参数为基础进行了仿真计算，形成了可行的开停机方案和机组最优出力曲线。
[Abstract]:With the increasing demand for energy, electric energy plays a more and more important role in our daily life as a kind of clean secondary energy. With the increasing demand for electricity, the scale of power grid is expanding day by day.These have brought new challenges to the operation of power system. As one of the four basic requirements of modern power system operation, the economy of power system operation has always been the research topic of electric power workers and researchers.Reasonable power system operation optimization means will bring huge economic and environmental benefits to the whole society.Firstly, the linear optimal model of power system economic dispatch is established, and the error analysis is carried out, and the conclusion is drawn that the error generated by the characteristic curve of quadratic consumption of piecewise Secant linearized generator is very small.The conclusion is applied to the optimization model of unit commitment problem, and how to determine the optimal electricity price of the system is analyzed according to the economic significance of the dual principle of linear programming.Secondly, the DC optimal power flow model of power system with nonlinear programming is established. Based on the standard DC optimal power flow model, the penalty term of square sum of nodal voltage phase difference is added to the model, and a strictly convex quadratic programming problem is obtained.Through this model, the active power injected by the node, the branch power flow, the marginal price of the node and the phase angle difference of the node voltage can be directly solved.At the same time, it is concluded that the power of the transmission line is the linear combination of the power of the system without considering the network loss.Finally, an optimization model of power system unit combination problem based on mixed integer programming is established, which simulates the energy structure of Hainan Power Grid and considers six types of units, including thermal power, hydropower, nuclear power, wind power, gas and electricity, and pumped storage.The principles of Lagrangian relaxation method, branch definition method and cutting plane method are analyzed. Based on the conclusions obtained from the first two models and based on the actual parameters, the feasible open / stop scheme and the optimal generating force curve are obtained.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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