基于电力载波通信的低压配电网拓扑结构辨识方法

Low-Voltage Distribution Network Topology Identification Method Based on Power Carrier Communication

针对低压配电网在运维监测、故障消除等方面的需求,通过研究户变连接关系自动识别与精准校验,本文提出了一种基于宽带载波通信的户变识别和相位识别技术。通过某一已知相位的相线设备在检测到电流正向过零时立即发送报文,接收端设备接收报文并分析比较过零时间的方式,判断接收端设备的相位及其分支线,完成用户的相位和台区识别,并对相位识别方法用PSCAD进行仿真,正确识别了4个待测用户的相位,验证了可行性。此方法实现方便,判断结果准确。

Aiming at the needs of low-voltage distribution network in operation and maintenance monitoring,fault elimination and other aspects,through the study of automatic identification and accurate verification of household transformer connection relationship,this paper proposes a household transformer identification and phase identification technology based on broadband carrier communication. When a phase line equipment with known phase detects that the current is passing zero,it immediately sends a message. The receiving end equipment receives the message and analyzes and compares the way of zero crossing time,judges the phase and its branch line of the receiving end equipment,completes the user’s phase and station area identification,and simulates the phase identification method with PSCAD,and correctly identifies the phases of four users to be tested,which verifies the feasibility of the method. This method is easy to realize and the result is accurate.