摘要
针对高压配电网扩张过程中电流互感器(current transformers,CT)测量不够精确的问题,提出一种CT幅相误差稳态数学模型。CT稳态模型与其铁芯磁性相关,可根据铁芯磁导率和功率损耗预测CT振幅误差和相位误差。减小CT误差,其中高磁导率和低损耗是铁芯理想的磁特性,同时,保持低负载阻抗也很重要。因此,将铁芯磁导率、铁芯损耗、负载阻抗与CT误差函数联系起来,将CT误差作为这3个参数的函数进行仿真分析。最后,通过实验和模型预测数据对比分析,验证所提CT稳态数学模型的算法正确性。
In order to solve the problem of inaccurate measurement of current transformer(CT)during the expansion of high-voltage distribution network,a steady-state mathematical model of CT amplitude and phase errors is proposed.The CT steady state model is related to the basic magnetism of the core,and the CT amplitude and phase errors can be predicted according to the permeability and power loss of the core.Achieving low CT error,high permeability and low loss are ideal magnetic characteristics of iron core,and it is also important to maintain low load impedance.Therefore,the core permeability,core loss,load impedance and CT error function are related to,and the CT error is simulated as a function of these three parameters.Finally,the correctness of the steady state mathematical model of CT is verified through the comparison and analysis of experimental and model prediction data.
作者
王立军
吴嘉腾
WANG Lijun;WU Jiateng(State Grid Zhejiang Shengsi County Power Supply Company,Zhoushan 202450,China)
出处
《系统仿真技术》
2024年第1期39-48,共10页
System Simulation Technology
基金
国网浙江省电力有限公司科技项目(52110132N145)。
关键词
电流互感器
稳态数学模型
相位误差
补偿
current transformer
steady state mathematical model
phase error
compensation
