CN201601496U - Low voltage reactive power compensation device - Google Patents

Abstract

A low-voltage reactive power compensation device relates to the application technical field of a low-voltage power distribution network reactive power compensation device in urban and rural power grids. A vertical partition is set in the box to divide the box, the metering room is set on the left side of the compensation room, the feeder room is set behind the compensation room, the incoming line room is set behind the measuring room, and the incoming line is set in the incoming line Control switch, set the transformer under the incoming line control switch, set the outgoing line control switch in the outgoing line room, set the transformer under the outgoing line control switch, set the compensation control switch in the outgoing line room, and set the lightning arrester under the compensation control switch. A circuit breaker and a leakage relay are installed on the upper part of the compensation room, a compound switch is installed in the middle of the compensation room, a capacitor is installed in the lower part of the compensation room, and a ZMFD-2000 power distribution comprehensive controller is installed in the metering room. The utility model has the characteristics of small occupied space, unattended operation of the equipment, less maintenance and the like.

Description

Low voltage reactive power compensation device

technical field

The utility model relates to the application technical field of a low-voltage power distribution network reactive power compensation device for urban and rural power grids.

Background technique

The LTB reactive power compensation device adopts thyristor to control the automatic switching of the capacitor bank. Since the design does not consider the three-phase unbalance of the low-voltage load, the AC sampling signal is the real-time load of the A phase. By calculating the power factor of the sampling phase, the three-phase simultaneous control of the capacitor bank Switching, the compensation capacity is small, switching without grouping can not accurately reflect the actual three-phase reactive power shortage of the power grid, and the device (LTB) is prone to switching oscillations. JKY voltage-type reactive power compensation device determines capacitor switching according to voltage fluctuation, and is suitable for installation in places with low natural power factor and stable load, so JYK reactive power compensation device requires selection of a suitable installation location. JKFA reactive power compensation device uses reactive power and voltage as control parameters to carry out compound control, develops multi-parameter control from single parameter control, without switching oscillation and compensation dead zone, the disadvantage is that the wiring is more complicated and the current polarity is strict.

Utility model content

In order to solve the shortcomings of the existing reactive power compensation device, such as small compensation capacity, easy switching and vibration, and complicated wiring, the utility model provides a new low-voltage reactive power compensation device.

The utility model uses partitions to divide the box into four spaces, the four spaces are respectively a metering room, a compensation room, an incoming line room, and an outgoing line room. The metering room is arranged on the left side of the compensation room, and the compensation A feeder room is set behind the chamber, an incoming line room is set behind the metering room, an incoming line control switch is set in the incoming line room, a transformer is set under the incoming line control switch, and an outgoing line control switch is set in the outgoing line room. switch, a transformer is set under the outgoing line control switch, a compensation control switch is set in the outgoing line room, a lightning arrester is set under the compensation control switch, a circuit breaker and a leakage relay are set on the upper part of the compensation room, and in the compensation room A compound switch is set in the middle, a capacitor is set in the lower part of the compensation room, and a ZMFD-2000 power distribution comprehensive control instrument is set in the metering room. The outgoing line end of the compensation controller is connected to the incoming line end of the compensation controller, the outgoing line end of the compensation controller is connected to a capacitor, the outgoing line end of the capacitor is connected to a composite switch, the outgoing line end of the composite switch is connected to a leakage protector, and at the leakage protector The outgoing line end cover is connected with the outgoing line control switch, and transformers are respectively arranged at the outgoing line ends of the incoming line control switch and the outgoing line control switch, and doors are respectively arranged on the outer sides of the metering room, compensation room, incoming line room, and feeder line room. The lower part of the door body of the metering chamber is provided with an inspection window, and the left and right sides of the box body are respectively provided with heat dissipation through holes.

The utility model adopts the advanced intelligent low-voltage electronic composite switch as the switch element, which completely solves the surge problem caused by capacitor switching. Through the control panel for group setting, each group can set its compensation mode and control parameters; this outdoor reactive power compensation device has perfect protection functions: undervoltage protection, overvoltage protection, loss of voltage protection, overcurrent protection, phase loss Protection, harmonic protection and other protection measures, high reliability; at the same time, the common compensation and separate compensation can be set arbitrarily; support static compensation, dynamic compensation mode; support remote control, with communication function; reasonable internal design, simple structure, Easy to use, strong anti-interference ability, technical indicators are at the leading level in China; suitable for installation in various occasions, small footprint, unattended normal operation of equipment, less maintenance, etc.; metering room, compensation room, incoming line room, The feeder room is divided into four independent working rooms. Since the four working rooms are independent, it can prevent the fault from spreading from one working room to another.

The door body of the metering chamber described in the utility model is provided with a padlock hole, and the padlock part has a rainproof function to prevent the padlock from corroding, thereby preventing man-made damage.

The door body of the compensation chamber described in the utility model is provided with an inspection window, in order to facilitate the staff to observe the capacitor compensation situation, as well as maintenance and inspection.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the rear view of the utility model;

Fig. 3 is the left view of the utility model;

Fig. 4 removes the top view of the utility model;

Fig. 5 is the layout diagram of components and parts of the present utility model;

FIG. 6 is a rear view of FIG. 5 .

In the figure, 1. Measuring room, 2. Compensation room, 3. Inlet room, 4. Outlet room, 5. Inspection window, 6. Padlock hole, 7. Inspection window, 8. Heat dissipation through hole, 9. Partition plate, 10 partition, 11, box body, 12, leakage relay, 13, circuit breaker, 14, composite switch, 15, capacitor, 16, incoming line control switch, 17, outgoing line control switch, 18, transformer, 19, lightning arrester, 20. Transformer, 21. Compensation control switch, 22. Fuse.

Detailed ways

As shown in Figures 1 to 6, the utility model uses partitions 9 and 10 to divide the box body 11 into four spaces, and the four spaces are respectively the metering chamber 1, the compensation chamber 2, the incoming wire chamber 3, and the outgoing wire chamber 4. The room 1 is set on the left side of the compensation room 2, the feeder room 4 is set behind the compensation room 1, the line inlet room 3 is set behind the metering room 1, the line line room 3 is set behind the metering room 1, and the line inlet room 3 is set The incoming line control switch 16, the transformer 18 is set under the incoming line control switch 16, the outgoing line control switch 17 is set in the outgoing line room 4, the transformer 20 is set under the outgoing line control switch 17, and the compensation control switch is set in the outgoing line room 4 21. Arrester 19 is set under compensation control switch 21, circuit breaker 13 and leakage relay 12 are set at the top of compensation room 2, compound switch 14 is set at the middle of compensation room 2, capacitor 15 is set at the bottom of compensation room 2, and A ZMFD-2000 power distribution integrated controller is installed in the metering room 1 , an inspection window 5 is set at the lower part of the metering room 1 , and cooling through holes 8 are respectively set on the left and right sides of the box body 11 . A padlock hole 6 is provided on the door of the metering room 1, and the padlock part has a rainproof function. An inspection window 7 is arranged on the door body of the compensation chamber 2 .

Claims (3)

1. low-voltage reactive compensator capable; it is characterized in that adopting dividing plate that casing is separated into four spaces; four spaces are respectively measuring room; the compensated chamber; basement; the outlet chamber; described measuring room is arranged on the left side of described compensated chamber; the back of described compensated chamber is provided with the feeder line chamber; the back of described measuring room is provided with basement; the inlet wire control switch is set in described basement; under described inlet wire control switch, instrument transformer is set; at the indoor line control switch that sets out of described outlet; go out line control switch and divide into and put instrument transformer described; at the indoor compensation control switch that is provided with of described outlet; below the compensation control switch, lightning arrester is set; on the top of described compensated chamber circuit breaker and leakage relay are set; middle part in the compensated chamber is provided with combination switch; bottom in the compensated chamber is provided with electric capacity; ZMFD-2000 comprehensive power distribution controller is set in described measuring room; the leading-out terminal of described service entrance switch connects the end of incoming cables of circuit breaker by lead; the leading-out terminal of described circuit breaker connects the end of incoming cables of compensating controller; the leading-out terminal of described compensating controller connects capacitor; the leading-out terminal of described capacitor connects combination switch; the leading-out terminal of described combination switch connects earth leakage protective device; outlet end cap at earth leakage protective device connects line control switch; at the inlet wire control switch; the leading-out terminal that goes out line control switch is respectively equipped with instrument transformer; at described measuring room; the compensated chamber; basement; the lateral surface of feeder line chamber is provided with a body respectively; described measuring room the door body the bottom inspection hole is set, in the left and right sides of described casing the heat radiation through hole is set respectively.

2. a kind of reactive power compensator according to claim 1 is characterized in that on described measuring room door body the padlock hole being set.

3. according to claim 1 or 2 described a kind of reactive power compensators, it is characterized in that on the door body of described compensated chamber, inspection hole being set.

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