计及动态电压稳定约束的分区柔性互联电网最大供电能力计算  

Total Power-supply Capacity Calculation of Partitioned Interconnected Power Grid Considering Dynamic Voltage Stability Constraints

作　　者：伏祥运 朱立位 赵喆 葛乐[2] FU Xiangyun;ZHU Liwei;ZHAO Zhe;GE Le(Lianyungang Power Supply Company,State Grid Jiangsu Electric Power Co.,Ltd.,Lianyungang 222004,Jiangsu Province,China;School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu Province,China)

机构地区：[1]国网江苏省电力有限公司连云港供电分公司,江苏省连云港市222004 [2]南京工程学院电力工程学院,江苏省南京市211167

出　　处：《电网技术》2023年第2期553-561,共9页Power System Technology

基　　金：国家自然科学基金项目(51707089);国网江苏省电力有限公司科技项目(J2020019)。

摘　　要：最大供电能力计算是分区柔性互联电网规划的重要问题,随着可再生能源大量接入电网,动态电压失稳问题愈发突出。计及动态电压稳定约束的最大供电能力计算模型非线性特征明显,给模型求解带来较大挑战。首先,运用改进的小干扰分析法对动态电压稳定进行分析,建立计及动态电压稳定性指标的最大供电能力的数学模型。其次,给出基于深度确定性策略梯度算法的最大供电能力计算方法框架,设计其动作与状态空间、奖励函数、神经网络与学习流程。最后,以某电网为例进行验证,该方法在有效避免电网动态电压失稳的同时优化分区互联电网的最大供电能力计算。The calculation of total power supply capability is an important issue in the planning of a partitioned flexible interconnected power grid. With a large number of renewable energy connected to the grid, the problem of dynamic voltage instability is becoming more and more prominent. The nonlinear characteristics of the maximum power supply capacity calculation model are obvious considering dynamic voltage stability constraints, which brings about great challenges to the model solution. Firstly, by analyzing the dynamic voltage stability with the improved small disturbance analysis, the mathematical model of the total supply capability is established considering the dynamic voltage stability indexes. Secondly, the calculation framework of the maximum power supply capacity is given based on the deep deterministic strategy gradient algorithm, designing the action and state space, reward function, neural network and learning process of the model. Finally, taking a power grid as an example, this method can optimize the calculation of the maximum power supply capacity while effectively avoiding the dynamic voltage instability of the interconnected power grid.

关 键 词：动态电压 最大供电能力 深度强化学习 分区柔性互联 

分 类 号：TM721[电气工程—电力系统及自动化]