基于载波技术的直流系统母联开关自检方法  

Bus Coupler Switch Self-checking Method for DC System Based on Carrier Technology

作　　者：徐浩 时开泉 樊新启 XU Hao;SHI Kaiquan;FAN Xinqi(Shenzhen Power Supply Bureau,Shenzhen 518000,China)

机构地区：[1]深圳供电局有限公司,广东深圳518000

出　　处：《电工技术》2018年第21期55-57,60,共4页Electric Engineering

摘　　要：当双电源直流系统在两个电源电压接近且负荷均分时,通过电压、电流参数无法判断系统是否并联。传统检测方法是小幅提高一个电源电压,通过检测另一电源电压是否跟随升高来判断,但操作步骤相对繁琐。为此,在研究直流系统基础上引入载波通信机制,在母联开关内两侧静触头上分别安装高频信号发生和高频信号接收装置。在开关导通情况下,信号会从开关一侧传输到另一侧;在开关未导通情况下,信号传输不到对侧。通过MATLAB建模仿真,验证了该检测方法和检测装置的逻辑性和可行性。When the two supply voltages of the dual-supply DC system are close and the load is evenly distributed,it cannot be judged whether the system is connected in parallel by the voltage or current parameters.The traditional detection method is to slightly increase a power supply voltage for judging whether another power supply voltage follows the increase,but the operation steps are relatively complicated.Based on the study of the DC system,this article introduces the carrier communication mechanism and installs the high-frequency signal generation and high-frequency signal receiving devices on the static contacts on both sides of the bus coupler switch.Under the condition of switch being in physical conduction,the signal will transmitted from the side of switch to the other side.In the case where the switch is not physically conductive,the signal will not be transmitted to the opposite side.The logic and feasibility of the detection method and detection device are verified by MATLAB modeling and simulation.

关 键 词：变电站 直流系统 母联开关 并联检测 单片机 仿真 

分 类 号：TM912[电气工程—电力电子与电力传动]