为了解决现有的在线微机开票系统普遍存在的实时数据可靠性不高和面向多站开票时效率低的问题,提出了一种多站召唤式在线微机开票系统的设计思想和实现方法。该系统的实时数据获取基于3层结构和召唤式的方法,即只在特定的一些时刻有选择性地获取相应变电站的相关实时数据,这样既保证了在多站开票时现场和开票系统数据的一致性,又大大减轻了网络和服务器的负担。另外,系统还引入了实时数据校核机制,提高了数据可靠性和安全性。 In order to solve the problem that the real-time data is ubiquitous and has low efficiency in multi-station billing when existing online billing system exists, a design idea and implementation method of online calling system using multi-station calling system are proposed. Real-time data acquisition of the system is based on a three-layer structure and a call-like method, that is, the related real-time data of the corresponding substations are selectively obtained only at specific moments so as to ensure that the live and invoicing system data Consistency, but also greatly reduce the burden on the network and server. In addition, the system also introduced a real-time data checking mechanism to improve data reliability and security.