基于需求侧的微电网经济运行优化研究

发布时间：2018-06-09 21:36

本文选题：微电网 + 需求侧管理　；参考：《东北石油大学》2016年硕士论文

【摘要】：微电网的运行方式灵活,以不同方式运行时产生的经济效益是其在电力系统中得到推广的关键因素。合理安排微电网中可控微电源的运行计划,在满足负荷需求的基础上实现微电网的经济运行一直是微电网研究的重点。然而随着现代电力系统的进一步发展,微电网运行的利益主体也正在向多元化的方向转变,需求侧资源的管理得到了更多重视。首先,本文对微电网经济运行的原理进行了分析,在此基础上,提出基于需求侧的微电网经济调度模型。模型由左右两侧组成,左侧为发电侧,主要任务是对可控微电源进行调度;右侧为需求侧,电力用户根据发电侧给出的个性化电价,对负荷进行转移,并将新的负荷需求数据提供给发电侧。发电侧以此为依据,重新优化可控微电源的出力计划。如此循环迭代,最终实现微电网发电侧企业和需求侧电力用户双赢的目标。其次,根据电价变化时不同种类电力用户的用电量数据,拟合出了各类用户对电价的响应曲线。在得到用户对电价响应曲线的基础上,结合经济学基本原理,以负荷曲线的“削峰填谷”为目的,根据各时段负荷制定分时电价,实现对负荷曲线的改善。再次,以发电侧运行成本最小和最大节点电压偏差最小为目标,建立了具体的基于机会约束规划的微电网经济运行模型。风电机组输出功率以及负荷功率具有随机性,在对相关约束条件进行校验时采用基于半不变量法和Gram-Charlier级数展开理论的微电网随机潮流方法提升算法收敛速度。在算法的寻优过程中采用定步长和变步长相结合的混合变异策略,使算法的搜索能力得到了提升。最后根据多属性决策原理对Pareto最优解进行进一步选择。最后,以前文中构建的模型为基础,结合算例,针对微电网实施或未实施需求侧管理(Demand Side Management,DSM)的两种情况进行仿真分析,更加直观的反应实施DSM的经济效益,对优化后的微电网运行模式进行分析,验证所提模型的合理性。
[Abstract]:The operation mode of microgrid is flexible, and the economic benefit is the key factor to be popularized in power system. Reasonable arrangement of the operation plan of controllable micro-power supply in microgrid and realization of economic operation of micro-grid on the basis of satisfying load demand have always been the focus of microgrid research. However, with the further development of modern power system, the main interests of micro-grid operation are also changing to the direction of diversification, and the management of demand-side resources has been paid more attention. Firstly, the principle of microgrid economic operation is analyzed in this paper. Based on this, a demand-side model of microgrid economic dispatching is proposed. The model is composed of left and right sides, the left side is the generation side, the main task is to dispatch the controllable micro power supply, the right side is the demand side, the power user transfers the load according to the individualized electricity price given by the generation side. The new load demand data are provided to the power generation side. On the basis of this, the power generation plan of controllable micro power supply is reoptimized. In this way, the Win-Win goal of microgrid generation side enterprises and demand-side power users can be achieved. Secondly, according to the electricity consumption data of different kinds of power users, the response curve of different kinds of users to electricity price is fitted. On the basis of obtaining the response curve of user to electricity price, combined with the basic principle of economics, aiming at "cutting peak and filling valley" of load curve, the time-sharing price is established according to the load of each period, and the improvement of load curve is realized. Thirdly, aiming at the minimum operation cost and the minimum voltage deviation of the maximum node, a specific economic operation model of micro-grid based on opportunity-constrained programming is established. The output power and load power of wind turbine are stochastic. In the calibration of the related constraints, the stochastic power flow method based on semi-invariant method and Gram-Charlier series expansion theory is used to improve the convergence rate of the algorithm. In the process of optimizing the algorithm, a hybrid mutation strategy combining constant step size and variable step size is adopted, which improves the search ability of the algorithm. Finally, the Pareto optimal solution is further selected according to the principle of multiple attribute decision making. Finally, on the basis of the model constructed in the previous paper, combined with an example, two kinds of situations of demand side management (DSM) are simulated and analyzed, which can directly reflect the economic benefits of implementing DSM. The optimized microgrid operation mode is analyzed to verify the rationality of the proposed model.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM732

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