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JZWG High-voltage Reactive Power Automatic Compensation and Filtering Device

2018-03-29 17:59


Product Overview

JZWG series reactive power automatic compensation equipment is specially developed for solving the distribution system reactive loss, voltage instability, low power factor and other issues of high-voltage reactive power compensation system. It applicable to 35kV, 110kV, 220kV single main or dual main transformer substation and on-load tap changing of reactive automatic tracking compensation and transformer of three-phase AC 50Hz, 10kV (6kV) bus. Through the automatic adjustment of on-load tap-changer and the automatic switching of the capacitor bank on the bus can realize the comprehensive control of the voltage and power factor of the substation.

Selecting high-quality components at home and abroad to improve the reliability of product working based on enhanced product performance. In particular, the special capacitor switching switch, with low ignition, maintenance-free long life, and other characteristics, can effectively reduce switching to cut capacitor operation overvoltage and re-ignition to improve the service life of the capacitor.

On the premise of satisfying the functional requirements of the user, making the products specialization, standardization and diversification. Using intelligent controller, based on the compensation of load consumption reactive power and voltage requirement as the check standard, the data are accurate. According to the actual needs of the user, various control methods are adopted, the compensation capacitor can make full use of the benefit and reduce the reactive power loss to the maximum extent. It can test and display the voltage, current power factor switching state, harmonic and other parameters of the monitoring line. Networking with microcomputers, communication through computers and controllers, real-time monitoring of line conditions and controller status to download recorded data files, the controller can also be programmed through a communication interface.

In the system, control device, comprehensive test, compensating capacitor switching switch and other equipment are centrally installed in a group of high pressure cabinet, and the control part is concentrated in a high-voltage switchgear cabinet, which is easy to install and easy to maintain on the spot.

Product Features

♦Product specialized, standardized and diversified.

♦Using intelligent controller, the data is accurate.

♦Varieties of control methods make compensation capacitor to give full play to benefits to maximize reactive power loss reduction.

♦Testing and displaying circuit voltage, state of current power factor switch, harmonic and other parameters.

♦Through the computer and controller communication, real-time monitoring of line conditions and data files of controller status T recorded.

♦Through the communication interface to program the controller.

Comprehensive control principle of voltage and reactive power

Voltage and reactive power integrated control system can meet the demand of reactive power and reduce reactive power flow on the premise that the system voltage is up to standard, reducing the comprehensive loss of the system. The switching quantities of the low-voltage side switch and the busbar connection switch of the main transformer are collected to identify the operation mode of the substation, acquisition of compensation bus voltage and main transformer current to calculate system power factor and reactive power demand, through automatic switching of capacitor banks and adjustment of loaded tap for main transformer which realize integrated voltage and reactive power control for substation.

Principle of nine domain graph control

Regulating tap and switch capacitors of on-load voltage regulating transformers, making the system run as far as possible in area 0. Each area is divided according to the figure above and the control rules are as follows:

Area0: The voltage and reactive power are up to standard, for the stable working area, do not adjust.

Area1: If the reactive power exceeds the upper limit and the voltage exceeds the lower limit, the capacitor bank will be put on first. When the capacitor banks are fully in, the busbar voltage is still below the voltage limit and the boost instruction is sent.

Area2: Reactive power over the upper limit, voltage qualified, send capacitor bank instructions. If the capacitor is still in the area, the capacitor is maintained.

Aear3: When the voltage exceeds the upper limit, the voltage is sent down, and when the on-load switch is in the lower limit position, the capacitor bank is forced to be cut.

Area4: When the bus voltage exceeds the upper limit, the reactive power is stable, and when the on-load switch is at the lower limit, it sends the instruction to cut off the capacitor bank by force when the on-load switch is at the lower limit.

Area5: The upper limit of bus voltage and the lower limit of reactive power are the first to send off capacitor instruction. When the capacitor bank is finished, the bus voltage is still higher than the upper limit and the voltage is reduced.

Area6: When the reactive power exceeds the lower limit, the shedding capacitor bank instruction. If the capacitor bank is finished, it is maintained in the area.

Area 7: When the bus voltage exceeds the lower limit, the reactive power exceeds the lower limit to send the boost instruction. When the on-load switch is in the upper limit position, it sends the instruction to switch on the capacitor bank by force.

Area 8: When the voltage exceeds the lower limit, the reactive power is stable, the boost instruction is sent, and when the on-load switch is in the upper limit position, the instruction is sent to the capacitor bank by force.


Attachment: The query table of reactive power




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