基于非线性冲击负荷谐波特性识别模型的超大城市核心圈电网不平衡电压控制方法  

A Method for Controlling Unbalanced Voltage of Power Grid in the Core Circle of Megacity Based on Nonlinear Impulse Load Harmonic Characteristic Identification Model

作　　者：赵茜 庞晨 朱立铭 宋悦 甘晓雯 屠稼茗 ZHAO Qian;PANG Chen;ZHU Liming;SONG Yue;GAN Xiaowen;TU Jiaming(Urban Power Supply Company of State Grid Shanghai Electric Power Company,Shanghai 200080,China)

机构地区：[1]国网上海市电力公司市区供电公司,上海200080

出　　处：《微型电脑应用》2025年第2期124-127,共4页Microcomputer Applications

摘　　要：针对超大城市核心圈的电网不平衡电压控制方法在实际应用中受到非线性冲击负荷谐波的影响,导致电压超调,提出一种基于非线性冲击负荷谐波特性识别模型的超大城市核心圈电网不平衡电压控制方法。根据超大城市核心圈的不同结构和情况进行建模,以分裂母线电容结构与电压平衡器结构为例建立模型,深入分析节点电压不平衡度。利用非线性冲击负荷谐波特性识别模型对负荷谐波进行分类与无功补偿,降低负荷谐波对控制过程的干扰,引入虚拟惯量进行计算,实现超大城市核心圈电网不平衡电压的控制。实验结果表明,在算例电网负载突变的情况下,所提方法的母线电压变化量平均为传统控制方法的56%,且能够在更短时间内将电压调整到额定值,具有一定的有效性。Aimed at the unbalanced voltage control method for power grid in the core circle of megacity is affected by nonlinear impulse load harmonics in practical applications,resulting in voltage overshoot.A method for controlling the unbalanced voltage of power grid in the core circle of megacity based on nonlinear impulse load harmonic characteristic identification model is proposed.Based on the different structures and situations of the core circle of megacity,modeling is carried out using split bus capacitor structure and voltage balancer structure as examples to deeply analyze the voltage imbalance of nodes.The nonlinear impulse load harmonic characteristic identification model is used to classify the load harmonics and compensate for reactive power to reduce the interference of load harmonics on the control process,and virtual inertia is introduced for calculation to achieve the control of unbalanced voltage of power grid in the core circle of megacity.The experimental results show that in the case of sudden load changes in the power grid,the bus voltage variation of the proposed method is 56%of that of the traditional control method on average,and the voltage can be adjusted to the rated value in a shorter time,which has certain effectiveness.

关 键 词：超大城市核心圈电网 不平衡电压控制 非线性冲击负荷 谐波特性识别 

分 类 号：TM464[电气工程—电器]