组建电力城域网的主流技术——宽带IP技术

论述了电力行业必须建设一个高可靠性的宽带电力通信综合业务平台的必要性和迫切性。在分析电力通信业务特点的基础上，指出数据和多媒体业务将成为电力通信业务的主体，提出对数据业务量很少，但对QoS要求100％可靠性的继电保护，安全稳定控制，AVC，AGC等直接影响电网安全运行的实时数据，以及电力调度指挥命令（话音），应该采用物理隔离的专用光纤网直接传送；对于其他实时，非实时的大量数据业务，在比较分析各种组网技术的基础上，建议在宽带IP城域网上传送，根据业务的需求和发展，可采用高速路由器为核心的交换技术，吉比特以太网技术或弹性分组环网技术，组建IP over D(C)WDM宽带电力城域网，其QoS在相关技术的支持下完全可以满足电力实时业务和视频业务的规范要求，最后提出了现有电力通信业务向宽带IP城域网过渡的方式和步骤。

BROADBAND IP TECHNOLOGY: THE MAINSTREAM TECHNOLOGY FOR DEVELOPING A METROPOLITAN AREA NETWORK

The necessity and urgency of building a highly reliable broadband power communication integrated service platform is described. Based on an analysis of the characteristics of power communication service, it is pointed out that the data and multi media service will become the main trends of the communication service. The real time data on relay protection, security and stability control, AVC, AGC etc., that ask for very little service but are required to be 100% reliable and of perfect QoS because of their direct impact on the safe operation of power network, and the power dispatching command order (voice) should be transmitted directly over a physically isolated special fiber optic network. For a large amount of data service, real time or not, transmission over a broadband IP metropolitan area network (MAN) is a good way according to the comparison between and analysis of various networking technologies. According to the service demand and development, it is advisable to set up IP over D(C)WDM broadband MAN by adopting the exchange technology with the high speed router as its core, the Gigabit Ethernet technology and resilience packet ring (RPR) technology. The QoS of the broadband MAN can fully satisfy the requirements of electric power real time service and video frequency service on standards with the support of the relevant technologies. The methods and steps of the transition from the present power communication service to broadband IP MAN are proposed.