Digital transforming plant protecting controlling method and multifunctional protection controller

Abstract

The invention relates to a digital transformer station protection control method and a multifunctional protection controller thereof, which belongs to the technical field of relay protection of the electric power system. The method comprises the following steps: a merging unit and an intelligent switch grouping unit of the digital transformer station perform message analysis and calculation to all groups of received message data to obtain the measured value of each group the message data; whether the starting of each group is satisfactory or not is detected by using the measured values, and whether the electric apparatus is out of service or not or in a normal working state is judged; the measured values of the group and the other groups and the computing result form wide area information together; and the protection and control functions of a feeder line, a transformer, a bus and a capacitor bank in the digital transformer station are performed. The controller mainly comprises a monitoring module and a plurality of functional modules. The invention realizes the comprehensive integration of protection and control of the digital transformer station. Furthermore, the invention can reduce the investment cost as well as the work load of running and maintenance, enhance the protection and control performance and enhance the security and the reliability of running of the transformer station.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and is particularly suitable for digital substations based on the IEC61850 standard. Background technique [0002] The current substation secondary equipment mainly adopts a layered and distributed structure, which is oriented to the interval and has independent functions. Monitoring, control, protection, fault recording, measurement and measurement are all single-function, independent devices. This mode divided by function and interval has high reliability, any device failure will not affect other functions and objects, and the system has good scalability and openness. However, repeated configuration of hardware, heavy loads of TA and TV, complex wiring, no sharing of information, lack of overall coordination and function optimization, high investment costs, and high operation and maintenance costs. These devices are generally based on single-point information an...

AI Technical Summary

Problems solved by technology

However, the current digital substation protection and control devices are still oriented to intervals and set up independently, and do not make full use of the information sharing brought about by networking. There are still problems of high investment costs, heavy operation and maintenance workload, and poor protection and control performance.

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