Power system anti-harmonic protection device

概述

       TC-600WX microcomputer type harmonic suppression device is suitable for 66KV, 35KV, 10KV, 6KV, 3KV and below the voltage level of neutral point is not grounded or through large resistance, arc suppression coil grounding system，Automatically eliminate the ferromagnetic resonance of PT in the system，Widely used in electric power, petroleum, chemical, coal, metallurgy and other industries。The device uses 32-bit ARM chip as the core component of detection, logic judgment and control, the CPU frequency is 60MHz, the bus is not out of the ARM chip, the use of high-power, contactless components for harmonic elimination, with the advantages of fast operation speed, stable performance, strong anti-interference ability。The device can not only eliminate ferromagnetic resonance, but also send alarm signals to overvoltage and single-phase grounding faults。

Design principle

       The device uses a 32-bit ARM chip for cyclic detection and real-time data acquisition of PT open triangle voltage。Through measurement, filtering, amplification and other digital signal processing technology，Analyze and calculate the data，If a fault occurs，The fault type is displayed，And display, store, print related fault information (including fault type, occurrence time, frequency, amplitude, etc.)，At the same time, an alarm signal is sent;If it's a ferroresonance failure，Instantly start the tuning element to eliminate in time。

Functional characteristics

       ◆ 32-bit ARM chip, fast operation speed, strong anti-interference ability, high data acquisition accuracy;

       ◆ Automatically identify and eliminate ferromagnetic resonance of different frequencies in the system, and alarm output;

       ◆ Real-time cyclic detection of PT open triangle voltage, real-time display of system clock and bus running status;

       ◆ LCD screen, Chinese menu, intuitive and rich information display;

       ◆ Data upload communication through communication interface (RS485/RS232 optional);

       ◆ No need to adjust and debug, minimal maintenance;Can store multiple fault data, not lost after power failure;

       ◆ Can distinguish ferromagnetic resonance, overvoltage, single-phase grounding and other fault types;

       ◆ Accurate diagnosis, fast detuning, correct action rate of 100%;

       ◆ When there is ground, resonance, overvoltage, the device is equipped with two sets of alarm contact output;

       ◆ Automatically display and record the occurrence time of ferromagnetic resonance and related parameters (resonance frequency, amplitude);

       ◆ The device has the function of fault self-test and self-recovery;

       ◆ Local printing function can be selected according to user needs。

Technical index

       ◆ Power supply voltage: AC/DC 220V±10% (can be customized according to user requirements);

       ◆ Power consumption: ≤20W;

       ◆ Voltage level: 1;Number of bus sections: 1-2;

       ◆ Ambient temperature: -10℃ ~ +55℃;

       ◆ Air relative humidity: ≤90%;

       ◆ Environmental requirements: The surrounding medium is free of conductive dust or corrosive gases and molds that damage the insulation。The installation site should be protected against wind, rain, sand and dust;

       ◆ Can eliminate the ferromagnetic resonance frequency: 17Hz (1/3 frequency division), 25Hz (1/2 frequency division), 50Hz (power frequency), 150Hz (3 times frequency) and above frequency of ferromagnetic resonance;

       ◆ Alarm output: the alarm relay is passive normally open contact, contact capacity: AC 250V/5A (DC 30V /5A);

       ◆ Communication interface: RS485, RS232 optional。