微分博弈理论在含多电源区域电力系统负荷频率控制中的应用研究

发布时间：2018-04-05 13:14

本文选题：负荷频率控制　切入点：微分博弈理论　出处：《华南理工大学》2014年硕士论文

【摘要】：针对由大规模风电并网对互联电力系统造成的频率和联络线功率偏差问题，本文引入微分博弈理论作为理论基础，根据海南电网的发电机组组成情况建立了两区域互联电力系统线性模型，对含有多电源小容量区域电力系统的负荷频率控制进行了研究，研究内容具体如下： 1、将最优跟踪控制理论的结果扩展到线性二次型微分博弈理论框架下，解决了在多输入多输出控制策略设计方法下，系统发电量在不同发电机组之间的分配问题，在充分考虑区域内各发电机组运行特性与系统要求的前提下，通过对支付函数权重矩阵的选取，设计系统中各发电机组在纳什均衡下的控制策略。仿真结果表明，与PI控制器和最优跟踪控制理论设计的控制策略相比，微分博弈跟踪控制策略能够在实现系统控制目标及改善机组运行状况的情况下，充分利用各发电机组的特性，平衡各发电机组的利益。 2、通过定义各发电机组在负荷频率控制中的参与度，分析了微分博弈理论中权重矩阵中对应于系统控制目标元素的取值对机组参与度的影响。研究结果表明，指定机组的参与度随着其权重矩阵中相应元素取值增加而提高，而其余机组则相应降低，相比于最优跟踪控制理论，其所带来的优点是电力系统的决策者可以根据各机组的特性、运行情况及系统要求决定其在负荷频率控制中所发挥的作用，为机组之间的协调控制提供了更大的自由度。 3、基于软抑制微分博弈理论增强了控制策略的鲁棒性，仿真结果表明，在系统对风电场出力变动测量或估计存在误差的情况下，与微分博弈跟踪控制策略相比，软抑制微分博弈跟踪控制策略能够降低该误差对控制目标偏差的影响，提高机组的响应速度。 4、将蓄电池储能系统引入负荷频率控制中，并对其所起的作用进行了研究，仿真结果表明，，在电力系统目前所采用的负荷频率控制方式下，蓄电池储能系统能够有效抑制由风电场出力变动造成的频率和联络线功率偏差与波动，改善机组运行状态；再结合本文所提出机组控制方法，系统已无明显的频率与联络线功率偏差波动，控制效果优异。本文研究受国家自然科学基金项目：基于高频交流技术的分布式可再生能源技术研究(51177050)及国家863高技术基金项目：含高渗透率间歇性能源的区域电网优化调度与互补运行关键技术研究(2012AA050201)资助。
[Abstract]:According to the frequency and power deviation from large-scale wind power on power system caused by the introduced differential game theory as the theoretical foundation, according to the generating units in Hainan power grid structure has established two regional linear interconnected power system model for power system load frequency with small capacity multi regional power control is studied. The specific research contents are as follows:
1, the optimal tracking control theory is extended to the linear two differential game theory, solves the multi input multi output control strategy design method, system of power allocation between different units of the problem, considering the area of each unit operation characteristics and system requirements of the premise, through the selection of payment function weight matrix, control strategy under the Nash equilibrium of the turbine design system. The simulation results show that compared with the PI controller and the optimal tracking control strategy design theory, differential game tracking control strategy can control the system operation status of target and improve the unit's situation, make full use of the characteristics of each turbine generator, and balance the interests.
2, through participation in the definition of each generator in load frequency control, analyzes the influence of the corresponding values in the control objectives of the system elements of the weight matrix differential game theory of unit participation. The results show that the specified unit participation with the increase of the value of the corresponding elements of the weight matrix are increased, while the rest of the unit the corresponding lower, compared to the optimal tracking control theory, the advantages brought by the power system decision makers can according to the characteristics of each unit, operation and system requirements determine the play in the load frequency control function for coordinated control between the units provide a greater degree of freedom.
3, soft constrained differential games theory to enhance the robustness of the control strategy based on the simulation results show that in the system of wind power fluctuation measurement or estimation error under the condition, compared with the differential game tracking control strategy, soft constrained differential game strategy can reduce the error influence on control target deviation tracking control, improve the response speed of the unit.
4, the battery energy storage system into the load frequency control, and its effect is studied, the simulation results show that the load frequency control of power system currently used, battery energy storage system can effectively suppress the wind farm output caused by changes in the frequency and tie line power deviation and volatility. To improve the operation status of the unit; combined with the proposed control method, the system has no obvious frequency and tie line power fluctuation, the control effect is excellent.
This research was supported by the National Natural Science Foundation Project: RETS Institute of Technology technology based on distributed high frequency AC (51177050) and the National 863 high technology project: Research on the key technologies of the optimization of regional power grid dispatching and complementary operation with high penetration of intermittent energy (2012AA050201) funding.

【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】：TM614

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