YD-WXZ Microcomputer Harmonic Suppression Device

1   Overview

In power systems, ferromagnetic resonance occurs frequently, leading to overvoltage during resonance, which poses a serious threat to system safety. Ferromagnetic resonance overvoltage can be mitigated by...3～220occurring in any kilovolt system, especially35In power grids of 1,000 kV and below, almost all internal overvoltage incidents are caused by ferromagnetic resonance. The overvoltage caused by ferromagnetic resonance can last for a long time, even potentially persisting for an extended period. During subharmonic resonance, the general overvoltage is not usually high, butPTThe current is large, prone toPTOverheating can lead to explosions; during fundamental and harmonic resonance, the current is generally not high, but the overvoltage is very high, often causing equipment insulation damage and leading to severe accidents.

YD-WXZSeries Electromagnetic Resonance Elimination Device is our company's newly developed intelligent power resonance elimination device, featuring simple and convenient operation, no need for maintenance, and capable of quickly eliminating various frequency electromagnetic resonances with high accuracy. It can also print relevant information according to user requirements or transmit it to the supervisory control system via communication interfaces, suitable for unattended transformer substations.。

2   Features and Specifications

Ø  Suitable for various voltage levels in distribution networks.

Ø  Monitors four busbars.

Ø  Rapidly eliminate iron magnetic resonance at characteristic frequencies such as third-order, second-order, and power frequencies, as well as triple frequency.

Ø  Can differentiate external overvoltage, ferromagnetic resonance, and single-phase grounding.

Ø  Utilizing high-power, non-contacting harmonic suppression components, harmonic suppression is rapid and reliable.

Ø  Provide a set of passive alarm nodes.

Ø  Fault reports (type, time, voltage, and frequency) are displayed when a fault occurs.

Ø  The optional mini printer can promptly print out fault reports.

Ø  Configurable communication interfaces transmit relevant information to the superior monitoring system.

Ø  Save ten recent fault records, data will not be lost after power failure.

Ø  Hardware watchdog circuit prevents system hangs.

Ø  Comprehensive self-inspection features.

Ø  User-friendly interface with simple and convenient operation, full Chinese menu, and rich and intuitive display information.

3   Technical Specifications

3.1 Environmental Requirements

Ø  Indoor use, ensure good ventilation 。

Ø  Ambient Temperature:-10℃ ～ +55℃

Ø  Relative Humidity:Less than90%Surface free of condensation 。

Ø  Atmospheric Pressure:80 ～ 110Kpa 。

Ø  Altitude:< 2000m 。

Ø  Surrounding medium free of conductive dust and corrosive gases, mold, etc., that could damage metals or insulation.

3.2 Technical Specifications

Ø  Operating Power Supply:AC/DC220V(Any special requirements should be specified at the time of order.)Power Consumption≤20W。

Ø  Alarm Node Capacity:AC250V，5A；DC30V，5A。

Ø  Communication Interface:RS232/485(Choose one of the following,Please specify at the time of orderingPort rate1200～9600bps。

Ø  Communication Protocols: Built-in with three communication protocolsCM90、CDT、MODBUS。