客运专线电力SCADA系统通信组网方案解析

摘要

Research purposes: To ensure the reliability of power supply for passenger dedicated line, each power box -type substation should transmit the site data to SCADA system center for the analysis and processing and at the same time, it receives the control instructs from the system center. As there are numerous power box - type substations along the passenger dedicated line, the conventional communication network of Power SCADA system is can not meet the actual demand. Therefore, it is necessary to develop a reliable, economic, reasonable and advanced communication network program for Power SCADA system. This paper analyzed the principle of the new communication network program for Power SCADA system for providing the reference to the engineering design in future.Research conclusions: The power SCADA system for passenger dedicated line is a star network in logic and can provides the converged service. As there are numerous power box - type substations along passenger dedicated line, point to point network program can not be adopted and the transmission bandwidth has to be converged. On considering the network mode of transmission system for passenger dedicated line and the communication requirement of power SCADA system, a tree structure network in physics while a star - type in logic should be established to transmit power SCADA system data with way of collection convergence in layers by using EPL and EVPL. With this program, the reliability of the systemcan be much enhanced and the cost can be much cut with the feature of convenient maintenance. It is the best choice fora communication network of power SCADA system for passenger dedicated line.%研究目的:为保障客运专线供电的可靠性,各电力箱变需将现场信息传至电力SCADA系统中心进行分析处理,并接受中心下发的各种控制命令.而客运专线沿线电力箱变数量众多,传统的电力SCADA系统通信组网方案已不适应工程的实际需求.因此,研究出一个安全可靠、经济合理、技术先进的客运专线电力SCADA系统通信组网方案,并对其原理进行解析.研究结论:客运专线电力SCADA系统为汇聚型业务,在逻辑上是一个星型网络；由于客运专线电力箱变数量太多,不能采用点对点EPL组网方案,必须对传输带宽进行收敛；综合考虑客运专线传输系统的组网方式和电力SCADA系统的通信需求,可采用EPL与EVPL相结合,分层汇聚收敛的方式传送电力SCADA系统信息,构成一个逻辑上是星型但物理上是树形的网络；该方案可有效提高系统安全可靠性、降低工程造价、便于维护管理,是客运专线电力SCADA系统通信组网方案的最好选择.