利用以太网和ATM技术实现电网运行状态实时监测

针对当前电力系统动态安全监控系统中相角测量装置(PMU)数据传输时延大、系统规模有限的现象，利用计算机网络在数据传输中的准确性和高波特率性，采用以太网和异步传输模式(ATM)相结合的方式，通过全光纤通道，构建了一套高实时性的全网相角信息实时传输通道。在工程中，该系统实现了一个周期上传一次数据，从而可实现在PMU广域测量数据基础上对电网的运行状态进行实时监测。

REAL-TIME MONITORING SYSTEM FOR THE STATES OF POWER NETWORK OVER ETHERNET AND ATM

In present, the communication delay is uncertain and the number of the phase measurement unit (PMU) is limited in the supervisory and control system for dynamic stability. In order to make full use of the accuracy and high speed of computer network in data transmission, a transfer system for PMU data is built based on a combination of Ethernet and ATM. In the system, the communication delay, which is produced by the CSMA/CD in Ethernet, is reduced by using the Ethernet switch combined with the ATM switch. The error rate is also reduced because the program of the communication is programmed with the Windows Socket and TCP/IP protocol. Based on the fibre optic telecommunication cable, a real time transmission channel for the whole network phasor information is constructed. In the engineering practice, the system can transmit data one time in one circle to realize the real time monitoring of the power network operation situation based on the PMU wide area measured data.