Method for exchanging information between distribution measuring and controlling device and upper computer

Abstract

The invention relates to a method for exchanging information between a distribution measuring and controlling device and an upper computer, belonging to the technical field of DA (distribution automation). In the method, each physical quantity required to measure and control in a distribution system is abstracted as a relational database, a UDP (user datagram protocol) mode is adopted to deliver a communication order and parameters in the format of SQL (structured query language), and differences and communication details of the distribution measuring and controlling device are shielded. Upper computer software is supported by the relational databases; the distribution measuring and controlling device comprises a control program, a data sheet on the logical meaning, an NVM (nonvolatile memory) and a random storage. The whole information exchange process comprises six communication processes, namely the access configuration of the distribution measuring and controlling device, the polling on the distribution measuring and controlling device by using the upper computer, the control or configuration of the distribution measuring and controlling device by using the upper computer, the initiative report of the physical quantity changes by the distribution measuring and controlling device, the initiative report of SOE (sequence of event) records by the distribution measuring and controlling device and the soft reset of the distribution measuring and controlling device by using the upper computer. The method is used to improve the transportability of the upper computer software and eliminate fussy adjustment and configuration processes when the distribution measuring and controlling device is accessed and replaced.

Description

Technical field: [0001] The invention relates to the field of power distribution automation, in particular to an information exchange method between a power distribution measurement and control device and a host computer. Background technique: [0002] Distribution automation is the use of electronics, communication, and network technologies to integrate real-time distribution information to form a complete automation management system to realize the monitoring, protection, control and distribution management of the distribution system. [0003] The power distribution measurement and control device is used to measure and control the power distribution system transformer, circuit breaker, ring main unit, column switch, voltage regulation and reactive power compensation capacitor, power distribution line, etc., and provide power distribution system operation to the upper computer. Data necessary for control and management, devices that respond to remote signaling, telemetry, r...

AI Technical Summary

Problems solved by technology

The MODBUS communication protocol uses the method of reading and writing registers and coil values ​​to exchange information, but the power distribution measurement and control devices produced by different manufacturers have different register or coil addresses defined for the same physical quantity, and the data format is also self-defined; non-standard custom For the power distribution measurement and control device of the communication protocol, the physical quantity representation, register or coil address, and the information exchange method with the host computer are even more different.

Therefore, in the process of realizing the distribution automation system, according to different communication protocols, different communication programs must be developed for the information exchange between the host computer and the distribution measurement and control device, which leads to the construction, optimization, and maintenance of the distribution network. Communication and data processing programs and configurations must be continuously adjusted to follow changes in power distribution measurement and control devices, and this timely follow-up adjustment is almost impossible in practical applications

And this follow-up adjustment not only increases the complexity of the host software, but also introduces new security vulnerabilities and hidden dangers.

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