| It is a technology trend that monitoring and overhauling electric power equipments online, it has been a study hotspot how to transfer the state data of electric power equipments to monitor center safely and cheaply .This paper discusses current data transfer technologies in electric power equipments monitoring online. Based on analysis, we adopt the scheme of transferring data by GPRS remote terminal. This scheme has its advantage in cost and function. According to the requirement of CMS2000 compositive transformer substation state monitoring and fault diagnosis system of Ningbo Online Monitoring Systems Co., Ltd, we design and implement a GPRS remote terminal based ARM7TDMI-S mpu. The extensibility of software structure is sufficiently considered in design. Faults of similar products, such as not simultaneously supporting TCP and UDP protocol, not supporting remote software update etc , are overcome. The terminal initiates a connection according to the settings of user and the network state for saving communications cost. The terminal can save the unsettled data before restart and provide remote software update. |
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