基于分布式平台的低压电网负荷监测模型研究  

Research on Load Monitoring Method of Low-Voltage Grid Based on Distributed Platform

作　　者：姜雪娇 陈育培 JIANG Xuejiao;CHEN Yupei(Hainan Power Grid Co.,Ltd.,Haikou 570100,China)

机构地区：[1]海南电网有限责任公司,海南海口570100

出　　处：《自动化仪表》2023年第4期48-54,共7页Process Automation Instrumentation

摘　　要：由于城市用电规模逐渐加大,要求有能适应现代城市需求的电网监测方法对电网进行全天候的安全监测。采用了电压结合频率的电路控制技术,以此为基础建立了低压逆变器模型,对电网模型的年负荷数值进行了预测。对比了改进前后2种控制策略下微电源电压稳定性,得到了基于改进后压力流量-电压频率(PQ-Vf)控制策略和采用电网逆变器建立的低压微电网模型。分析了负荷频率和电压幅值,得出该模型具有频率负荷震荡幅度小、电源电压稳定的特点。分布式平台建立的低压电网负荷监测模型适用性强。建立的低压电网监测系统为各类用电系统的安全管理提供了理论支撑,为电力企业的性能测试提供借鉴。Due to the gradual increasing in the scale of urban electricity consumption,grid detection that can adapt to the needs of modern cities is required to monitor the grid for safety throughout the day.The voltage combined with frequency circuit control technique is used as the basis for the low-voltage inverter model,and the annual load values of the grid model are predicted.The voltage stability of the micro power supply is compared between the two control strategies before and after the improvement,and a low-voltage microgrid model is obtained based on the improved pressure quantity of flow-voltage frequency(PQ-Vf)control strategy and using grid inverters.The load frequency and voltage amplitude are analyzed,and it is concluded that the model has the characteristics of small frequency load oscillation amplitude and stable supply voltage.The low-voltage grid load monitoring model established by the distributed platform has strong applicability.The established low-voltage grid monitoring system provides theoretical support for the safety management of all kinds of electricity systems and has some reference for the performance testing of electric power companies.

关 键 词：城市用电 电网监测 分布式计算平台 低压微电网 负荷监测 低压逆变器 电压频率控制 压力流量-电压频率控制策略 

分 类 号：TH-9[机械工程]