Xhk-ii arc suppression coil automatic tuning and line selection equipment

Product Introduction:

The safe operation of power system and the reliability of power supply have become more and more important, and the choice of neutral ground mode is an important factor that directly affects the above two indexes. With the expansion of urban and rural power grids and the increase of cable outlets, the system's capacitive current to the ground increases sharply. After single-phase grounding, the current flowing through the fault point is large, and the arc is not easy to be extinguished, and it is easy to produce gap arc grounding overvoltage, resulting in an obvious increase in the accident trip rate. In order to solve the above problems, resonant grounding is generally adopted in the national power grid, that is, arc suppression coil is installed at the neutral point. The system diagram is shown in Figure 1.

Use environment:

Control section

Installation location: indoor

Temperature range: -5℃ ~ +45 ℃; Maximum change rate: 20℃/h.

Humidity: Relative humidity: 5% ~ 95%; Maximum absolute humidity: 28g/m3.

Power requirements: AC220 (-20% ~ + 15%); DC110V or 220V(-20% ~ + 15%)

Frequency: 50Hz

Primary equipment

XHK-II arc suppression coil complete equipment product features

Full range of products: the products cover 6kV ~ 66kV, self-designed and produced first and second all products of arc suppression coil complete equipment suppliers; Have a full study of various types of product performance, accumulated rich experience in operation

Good anti-interference,

High reliability: The controller adopts secondary power technology, which can resist devastating electromagnetic interference, and the primary and secondary systems all adopt optical/electrical isolation, which can completely eliminate the interference of the primary system to the controller. The controller is designed with double self-reset circuit, which can realize the automatic recovery of the system

Accurate grounding line selection function: The system is equipped with a line selection module, which can complete the grounding line selection of 48 outlets (the number of parallel operation is not limited). The device adopts the parallel resistance line selection function (patent number: ZL022153373), and puts the resistance into the ground for a short time, so that the current amplitude and phase of the ground point can be significantly changed, and the ground fault circuit can be accurately selected.

The product features of turn modulation and volume modulation

Fast grounding compensation speed: the turn-turn arc suppression coil uses the preset type for compensation compensation, which can compensate the single-phase grounding fault within 10μs, greatly reducing the probability of the transient grounding fault developing into a permanent fault

High reliability of the system: the turn-turn type arc suppression coil has simple structure and high reliability, and the arc suppression coil compensation has little dependence on the power supply and controller, and can continue to compensate when the fault and abnormal.

Primary and secondary complete isolation: The damping resistance protection of the damping box of the complete set of devices uses thyristor self-triggering technology to achieve double short-circuit protection to ensure the complete isolation of the primary and secondary systems

Perfect protection function: Designed a perfect protection function, including gear head lock, back and forth adjustment lock, continuous adjustment lock, single-phase grounding action lock and other perfect locking protection function, so that the whole system safe and reliable action

Phased product features

Wide adjustment range: the phase-controlled arc suppression coil compensation current adjustment range is wide, in the rated current range, stepless continuous adjustable.

Small compensation residual current: the continuous smooth adjustment of the phased arc suppression coil can make the residual current small and ensure reliable arc extinguishing.

Fast compensation speed: the phase-controlled arc suppression coil adopts PC104 and DSP for rapid acquisition and calculation, and can respond within 5ms when single-phase grounding occurs.

Product use

The device can be applied to the capacitive current compensation of the distribution network with the voltage level of 6 ~ 66kV, and is more and more widely used in the power system, metallurgy, petrochemical, coal and other industries, and has obvious effect on improving the reliability and safe operation of the power supply system. Siyuan Electric has done many field grounding verification tests in Chongqing, Yangzhou, Nanjing, Nanhai, Karamay, Shanghai Songjiang, Zhenjiang, Taizhou, Suzhou, Shanxi, Wenzhou, Jiaxing, Yancheng and other places, and the results show that the calculation is correct, the device calculation is accurate, the fast compensation is accurate, and the line selection is accurate. More than 15,000 sets are in operation at home and abroad.

Product parameter

Voltage level: 6kV, 10kV, 20kV, 35kV, 66kV

Communication interface: RS-232/ RS-485, Ethernet

Communication protocol: Built-in CDT, ISA, MODBUS and other protocols, can have IEC61850 communication

System capacitance current measurement error: the measurement error is not more than 2%

Number of routes: 1 to 48 routes are optional

Fault wave recording: 500 fault waveforms can be recorded

Grounding information: can record 500 fault grounding information

Adjustment mode: Pre-adjustment/commissioning

Control mode: one control one, one control two, which can realize automatic tuning and line selection integration of arc suppression coil.