The anti bypass trip protection system takes the entire power supply system as the research object, and the various protections configured in the system are closely coordinated with clear action zones. Any fault protection in the power supply system can be instantly activated according to the optimal power outage principle. The integrated protection and measurement device can be configured with multi interval line optical fiber longitudinal differential protection as the main protection for underground connecting lines, * * solving the problem of over class tripping caused by line short circuit faults. Develop a centralized low current grounding line selection module specifically for mining area substations to solve the underground protection problem of leakage tripping.

　　This system can achieve telemetry, remote signaling, remote control, and anti misoperation functions while implementing protection. It can complete the opening and closing operations of the underground high opening on the integrated protection measurement and control device or monitoring host on the ground, which is suitable for the mining area substation; No one on duty; Created conditions.

　　Scope of application:

　　Coal mine underground power supply system

　　System description;

　　System level synchronous sampling+real-time data transmission+real-time database

　　Centralized protection+dual configuration+on-site protection

　　System features:

　　Prevent over level tripping

　　This system replaces the quick break overcurrent protection as the main protection of the line by configuring the longitudinal differential protection of the line, which can completely solve the problem of short circuit and over level tripping that widely exists in the coal mine power supply system, and achieve zero time limit full line quick action of the entire system. The system provides centralized small current grounding line selection function to solve the problem of low accuracy of leakage protection and avoid the occurrence of over level tripping faults.

　　High reliability:

　　The fiber optic communication network, mining explosion-proof optical transmission interface, and integrated protection measurement and control device all adopt a dual configuration, and individual device failures do not affect protection performance; The mining intelligent protector is installed inside the high-voltage explosion-proof switch to achieve on-site protection function, forming the third level of protection and improving protection reliability.

　　Remote Measurement and Control

　　The system provides telemetry, remote signaling, and remote control functions to help operators timely understand the operation of the power grid.

　　Fault analysis:

　　Based on the fault recording of 256 points per week for the entire system, the application of recording analysis software can obtain current, voltage, and harmonic (up to 20th harmonic) data for the entire system during faults, greatly improving the accuracy of fault analysis; The integrated protection and measurement device can store up to 4096 fault records and memorize 32 sets of new fault waveforms.

　　Easy to operate:

　　The system implements the operation and debugging of a full graphic interface based on a mouse and standard keyboard, which is intuitive and convenient to operate; On the ground integrated protection measurement and control device, the on-site protection setting of the mining intelligent protector can be viewed and modified; The protection setting adopts standard file output and can be easily copied and downloaded using a USB flash drive.