TH2100 SCADA 系统中前置部分的研究

数据采集与监控系统SCADA在电力系统调度自动化中具有重要的地位，而其中前置部分又是SCADA后台与远方变电站或发电厂进行通信的中枢环节，文中介绍了TH2100 SCADA系统中所采取的提高性能的一些方法，包括通信服务器的引入，提高了可维护性，可扩展性和通信速率；PRG－2CHF智能双路调制解调器的使用，减轻了前置机的负担，降低了前置机故障时下发报文丢失的概率，采用了多线程的方式进行实时数据处理，提高了实时性。

Study on Front-End Processor of TH2100 SCADA System

SCADA (Supervisory Control and Data Acquisition )system plays animportant role in dispatch automation of power system. Its front-end processor(FEP)is the key component for data communication between SCADA servers and remote substations and power plants, so its performance must be very high. Some methods are presented, which are adopted in TH2100 SCADA system to improve its performance. The introduction of access server improves system maintainability, expandability and communication speed. The use of PRG-2CHF intelligent dual-channel modem makes the scheme of balanced dual-FEP configuration possible and improves the reliability. The balanced dual-FEP configuration reduces the loads of FEP and the probability of downward message loss, which occurs when one FEP is in failure. The adoption of multi-thread mode for real-time data processing improves the real-time property.