基于大系统分解协调理论的风水火电站联合调度优化
发布时间：2018-12-31 19:53
【摘要】：大系统理论是专门研究为了求解大规模系统的理论,其核心思想是通过模型简化、降阶、分解协调或者分散控制等手段,把一个大规模系统拆分为小系统后再去求解,避免直接求解大系统,进而避免了“维数灾”的发生。风水火电站联合调度系统是一个典型的大系统,它由三类电站组成,电站之间相互关联。通常以火电机组煤耗量最小为目标函数,并且需要同时考虑火电机组、水电站和风电场的约束条件。因此是一个典型的高维、非凸、多约束的复杂规划问题。本文从大系统理论出发,针对风水火电站联合调度大问题,提出了一种通用的大系统分解协调两层求解模型：上层是协调层,负责更新和发送协调变量；下层是风、水、火电站子问题。从而把风水火电站联合调度“大”问题分解成了单独的风、水、火电站“小”问题。下层子问题中,火电机组子问题通过动态规划法求解。针对不同的水电站模型,梯级水电站子问题通过大系统分解协调算法求解；单独水电站子问题通过启发式算法求解。风电场子问题通过建立风电功率预测输出模型求解。上层协调层中,使用拟牛顿法(BFGS)更新协调变量,既保证了算法的收敛精度,又保证了算法的收敛速度。通过两类风水火电站联合调度问题模型的实例仿真,验证了通用大系统分解协调模型求解风水火电站联合调度问题的可行性和通用性。
[Abstract]:The theory of large scale system is specially studied in order to solve the theory of large scale system. Its core idea is to divide a large scale system into a small system and then solve it by means of model simplification, order reduction, decomposition coordination or decentralized control. Avoid solving large system directly, and then avoid the occurrence of "dimension disaster". The wind-water power station joint dispatching system is a typical large-scale system, which is composed of three kinds of power stations, and the power stations are related to each other. Usually, the minimum coal consumption of thermal power units is taken as the objective function, and the constraints of thermal power units, hydropower stations and wind farms need to be considered at the same time. Therefore, it is a typical high-dimensional, non-convex, multi-constraint complex programming problem. Based on the large-scale system theory, this paper presents a general two-layer solution model of large scale system decomposition and coordination, which is responsible for updating and transmitting coordination variables. There are wind, water and thermal power station problems at the bottom. Thus, the "big" problem of the combined operation of the feng shui thermal power station is decomposed into a separate "small" problem of the wind, water and thermal power stations. In the lower subproblem, the subproblem of thermal power generating unit is solved by dynamic programming method. For different hydropower station models, the sub-problem of cascade hydropower station is solved by large-scale system decomposition and coordination algorithm, and the sub-problem of single hydropower station is solved by heuristic algorithm. The wind farm sub-problem is solved by establishing the wind power predictive output model. In the upper layer of coordination, the quasi-Newton method (BFGS) is used to update the coordination variables, which not only guarantees the convergence accuracy of the algorithm, but also ensures the convergence speed of the algorithm. The feasibility and generality of the general large-scale system decomposition and coordination model for solving the joint dispatch problem of the power plant are verified by the simulation of two kinds of wind power plant joint dispatch problem models.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM73
本文编号：2397042
[Abstract]:The theory of large scale system is specially studied in order to solve the theory of large scale system. Its core idea is to divide a large scale system into a small system and then solve it by means of model simplification, order reduction, decomposition coordination or decentralized control. Avoid solving large system directly, and then avoid the occurrence of "dimension disaster". The wind-water power station joint dispatching system is a typical large-scale system, which is composed of three kinds of power stations, and the power stations are related to each other. Usually, the minimum coal consumption of thermal power units is taken as the objective function, and the constraints of thermal power units, hydropower stations and wind farms need to be considered at the same time. Therefore, it is a typical high-dimensional, non-convex, multi-constraint complex programming problem. Based on the large-scale system theory, this paper presents a general two-layer solution model of large scale system decomposition and coordination, which is responsible for updating and transmitting coordination variables. There are wind, water and thermal power station problems at the bottom. Thus, the "big" problem of the combined operation of the feng shui thermal power station is decomposed into a separate "small" problem of the wind, water and thermal power stations. In the lower subproblem, the subproblem of thermal power generating unit is solved by dynamic programming method. For different hydropower station models, the sub-problem of cascade hydropower station is solved by large-scale system decomposition and coordination algorithm, and the sub-problem of single hydropower station is solved by heuristic algorithm. The wind farm sub-problem is solved by establishing the wind power predictive output model. In the upper layer of coordination, the quasi-Newton method (BFGS) is used to update the coordination variables, which not only guarantees the convergence accuracy of the algorithm, but also ensures the convergence speed of the algorithm. The feasibility and generality of the general large-scale system decomposition and coordination model for solving the joint dispatch problem of the power plant are verified by the simulation of two kinds of wind power plant joint dispatch problem models.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM73
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