Power network protection system

Abstract

The invention relates to a power network protection system. The power network protection system comprises a protection device, an intelligent terminal and a network protection server, wherein the intelligent terminal and the network protection server are respectively connected with the protection device through a network, the intelligent terminal is used for acquiring running condition data in real time, uploading the acquired data to the protection device and simultaneously receiving and executing a control command issued from the protection device, the protection device is used for collecting real-time data uploaded by the intelligent terminal and completing differential protection of a protected region, meanwhile, the protection device is used for uploading the collected data to the network protection server and receiving and executing the control command issued from the network protection server, the network protection server is used for collecting the data uploaded by the protection device, issuing a corresponding control command to the protection device according to real-time change of a network topology and completing automatic adjustment on a fixed value. By the power network protection system, a fault can be rapidly eliminated, the protection fixed value is automatically adjusted, and intelligent setting is achieved.

Description

technical field [0001] The invention relates to a protection system for a power network, in particular to a fast network protection system, which belongs to the technical field of relay protection. Background technique [0002] During the operation of the power system, various failures and abnormal operating states may occur. The most common and dangerous faults are various types of short circuits, including phase-to-phase short-circuits and ground short-circuits. In addition, disconnection of transmission lines, inter-turn short circuit of the same phase winding of rotating electrical machines and transformers, etc., as well as complex faults composed of the above-mentioned faults may also occur. When the normal operation of the electrical components in the power system is damaged, but no failure occurs, this situation is an abnormal working state, such as overload and power system oscillation. [0003] Abnormal operation and faults in the power system may cause system ac...

AI Technical Summary

Problems solved by technology

[0004] The traditional power relay protection system is configured according to a single protected component, based on local measurement information and a small amount of regional information, the object of protection is a single electrical component, there is no unified digital source, no unified data format, and no data sharing, complex protection configuration, difficulty in coordination between setting and setting values, lack of overall coordination when the power system fails, prone to successive actions, resulting in expansion of accidents and damage to system stability, which is not conducive to rapid removal of faults

[0005] At the same time, when the traditional power relay protection system protects and removes the faulty equipment and transfers the power flow caused by the non-faulty area, the protection setting is difficult to adapt to the change of the operation mode, which is not conducive to the rapid recovery of the power supply in the non-faulty area.

Moreover, the traditional power relay protection system does not optimize the acquisition device and communication device, repeated configuration, more group screens, larger floor space, complex secondary circuit, and heavy maintenance workload