CN208015374U - A high-reliability integrated intelligent low-voltage capacitor cabinet - Google Patents

Abstract

The utility model discloses a high reliability integrated form intelligence low pressure electric capacity cabinet, include: the cabinet body, the internal portion of cabinet sets up and mends return circuit, branch and mend return circuit, reactive compensation controller and alternating current power supply altogether, alternating current power supply is connected with mending return circuit, branch respectively through fuse formula isolator's output. Through the mode, the high-reliability integrated intelligent low-voltage capacitor cabinet reduces the transmission of reactive electric energy of a distribution line through the function of capacitance compensation, and reduces the electric energy loss on the distribution line; the load power factor is improved, the reactive power is reduced, and the efficiency of the power supply equipment is improved; inductive reactive power is compensated, power factors are improved, electric energy is saved, and electricity charge expenditure is reduced; the energy efficiency of the power grid is improved, and the main technical indexes of the electric energy quality are improved.

Description

A high-reliability integrated intelligent low-voltage capacitor cabinet

technical field

The utility model relates to the field of capacitor cabinets, in particular to a highly reliable integrated intelligent low-voltage capacitor cabinet.

Background technique

Most of the load types in the power system are inductive loads, coupled with the widespread use of power electronic equipment by power companies, the power factor of the grid is low, and the low power factor reduces the utilization of equipment, increases power supply investment, and damages The voltage quality reduces the service life of the equipment and greatly increases the line loss. In order to improve the energy waste caused by the low power factor of the power grid and these unfavorable factors for power supply production, the power factor of the power grid must be effectively improved. Obviously, it is unreasonable if all these reactive powers are provided by generators and transmitted over long distances. It is usually impossible. The reasonable way is to generate reactive power where reactive power is needed, that is, to increase reactive power compensation equipment and devices. The capacitor compensation cabinet, referred to as capacitor cabinet, came into being.

Utility model content

The technical problem mainly solved by the utility model is to provide a high-reliability integrated intelligent low-voltage capacitor cabinet.

In order to solve the problems of the technologies described above, a technical solution adopted by the utility model is:

Provides a high-reliability integrated intelligent low-voltage capacitor cabinet, including: a cabinet body, a common compensation circuit, a sub-compensation circuit, a reactive power compensation controller and an AC power supply are arranged inside the cabinet body, and the AC power supply passes through a fuse-type isolating switch. The output terminals are respectively connected to the common compensation circuit and the sub-compensation circuit. The common compensation circuit includes the first fuse, the first reactor, the first N-type thyristor, the first contactor and the triangular capacitor group. The AC power passes through the fuse-type isolation switch. The output end is connected to one end of the first fuse, the other end of the first fuse is connected to one end of the first reactor, and the other end of the first reactor is respectively connected to the first contactor and two first N-type thyristors connected in parallel. connection, the first contactor is connected in parallel with two parallel first N-type thyristors, the first contactor is connected with a triangular capacitor group, and the sub-compensation circuit includes a second fuse, a second reactor, a second N-type thyristor, a second Contactor and star-shaped capacitor group, the AC power supply is connected to one end of the second fuse through the output end of the fuse type isolating switch, the other end of the second fuse is connected to one end of the second reactor, and the other end of the second reactor One end is respectively connected with the second contactor and two second N-type thyristors connected in parallel, the second contactor is connected in parallel with the two second N-type thyristors connected in parallel, and the second contactor is connected with the star capacitor group.

In a preferred embodiment of the present invention, the AC power supply is connected to the lightning arrester through the output terminal of the fuse type isolating switch.

In a preferred embodiment of the present invention, the number of said co-compensation circuits is 6 groups.

In a preferred embodiment of the present invention, the number of the sub-compensation circuits is 4 groups.

In a preferred embodiment of the utility model, a fan is arranged on the top of the cabinet.

In a preferred embodiment of the present invention, the cabinet door of the cabinet body is provided with a control display, a main switch, a start button, an emergency stop button, an indicator light and a detachable see-through window.

In a preferred embodiment of the present invention, the inside of the cabinet is provided with mounting holes and mounting slots

The beneficial effects of the utility model are: to provide a high-reliability integrated intelligent low-voltage capacitor cabinet, the effect of capacitor compensation is to reduce the transmission of reactive energy on the distribution line, reduce the power loss on the distribution line; improve the load power factor , reduce reactive power, improve the efficiency of power supply equipment; compensate inductive reactive power, improve power factor, save electricity, reduce electricity expenses; improve power grid energy efficiency, improve the main technical indicators of power quality.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is a circuit diagram of a preferred embodiment of the high-reliability integrated intelligent low-voltage capacitor cabinet of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, the utility model embodiment comprises:

A high-reliability integrated intelligent low-voltage capacitor cabinet, including: a cabinet body, six sets of common compensation circuits 1, four groups of compensation circuits 2, a reactive power compensation controller 3 and an AC power supply are arranged inside the cabinet body, and the AC power supply passes through The output terminals of the fuse-type isolating switch FUK are respectively connected to the common compensation circuit 1 and the sub-compensation circuit 2, and the three-phase AC power supply is respectively connected to the ground end of the lightning arrester G.

The common compensation circuit includes the first fuse FU1, the first reactor K1, the first N-type thyristor SI1, the first contactor KM1 and the triangular capacitor group C1, and the AC power is connected to the first fuse through the output terminal of the fuse type isolating switch FUK One end of the first fuse FU1 is connected, the other end of the first fuse FU1 is connected to one end of the first reactor K1, and the other end of the first reactor K1 is respectively connected to the first contactor KM1 and two parallel first N-type thyristors SI1 connection, the first contactor KM1 is connected in parallel with two parallel first N-type thyristors SI1, and the first contactor KM1 is connected with a triangular capacitor C1 group.

The sub-compensation circuit includes the second fuse FU2, the second reactor K2, the second N-type thyristor SI2, the second contactor KM2 and the star-shaped capacitor group C2, and the AC power passes through the output end of the fuse type isolating switch FUK and the second One end of the fuse FU2 is connected, the other end of the second fuse FU2 is connected to one end of the second reactor K2, and the other end of the second reactor K2 is respectively connected to the second contactor KM2 and two parallel second N-type thyristors SI2 is connected, the second contactor KM2 is connected in parallel with two parallel second N-type thyristors SI2, and the second contactor KM2 is connected with the star-shaped capacitor group C2.

The switching common terminal O of the reactive power compensation controller U is connected to the live line L, and the control switching port S of the reactive power compensation controller U is connected to the normally closed auxiliary contact of the relay KA to the neutral line N through the coil of the contactor KK.

Integrate six groups of common compensation circuit 1, four-group compensation circuit 2, reactive power compensation controller 3 and AC power supply into a common compensation circuit module, a separate compensation circuit module, a control module and a power module, and integrate them into a whole, When the cabinets are installed, the stacking method of building blocks is adopted to realize the fast, efficient and high-precision measurement, calculation and harmonic analysis of power grid parameters such as three-phase current, three-phase voltage, three-phase active power, three-phase reactive power, and power, so that the low-voltage Reactive power compensation has the characteristics of better compensation effect, lower power consumption, smaller volume, more cost savings, more flexible use, more convenient maintenance, longer service life and higher reliability. Higher demand for compensation.

A microprocessor, a fan, and an alarm are also set inside the cabinet. The fan is set on the top of the cabinet. The heat dissipation temperature, high temperature alarm temperature and super high temperature are preset in the microprocessor. When the ambient temperature detected by the temperature sensor reaches the heat dissipation When the temperature is high, the auxiliary power terminal of the microprocessor is connected with the heat dissipation interface to make the fan work, and the temperature of the environment is reduced by promoting air flow. When the ambient temperature is lower than the heat dissipation temperature, the microprocessor issues a command to stop the fan; When the ambient temperature detected by the temperature sensor reaches the high-temperature alarm temperature, the high-temperature alarm input and output terminals of the microprocessor are turned on, the alarm is powered on, and the alarm sends out an alarm signal to remind the staff to turn off part of the load to reduce heat dissipation of the load to avoid Its loss; when the ambient temperature detected by the temperature sensor reaches an ultra-high temperature, the ultra-high temperature input and output of the microprocessor are turned on, and the capacitor is disconnected by driving the coil of the relay and the coil of the contactor. Group, to achieve the purpose of protecting the equipment, when the ambient temperature is lower than the high temperature alarm temperature, the microprocessor sends a command to control the disconnection of the capacitor group to start working again.

The door of the cabinet is equipped with a control display, main switch, start button, emergency stop button, indicator light HY and a detachable see-through window. There are installation holes and installation card slots inside the cabinet. When the upper or lower cabinet door is opened, when the components in the capacitor cabinet fail and need to be opened for maintenance, the main switch will be opened, so that the components in the capacitor cabinet will be in a power-off state to ensure the safety of users; through the see-through window , the operator can see the internal situation, which is convenient for the investigation of potential safety hazards, and the perspective window must be cleaned after long-term use, so it is more convenient to clean through the detachable structure; when working, the components in the capacitor cabinet heat up, if Failure to dissipate heat in time will affect the service life of the components, which is not conducive to use. Therefore, the fan is used to dissipate heat, and the thermal sensor is connected to the capacitor bank. When the temperature detected by the thermal sensor is higher than the limited temperature, the fan rotates and actively dissipates heat , to ensure the stability of the overall mechanism operation.

The beneficial effect of the utility model is that the high-reliability integrated intelligent low-voltage capacitor cabinet is provided: a high-reliability integrated intelligent low-voltage capacitor cabinet is provided, and the function of capacitance compensation is to reduce the reactive power transmission of the distribution line and reduce the distribution line increase the load power factor, reduce reactive power, and improve the efficiency of power supply equipment; compensate inductive reactive power, increase power factor, save electric energy, and reduce electricity expenses; improve grid energy efficiency and improve the main technical indicators of power quality.

The above descriptions are only examples of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (7)

1. a kind of high reliability integrated-type intelligent low-voltage capacitor box, which is characterized in that including：Cabinet, cabinet inside setting Road is refilled altogether, point refills road, idle compensating control and AC power, and AC power passes through the output of fuse disconnecting switch End refills road, point refills road connection together respectively, and it includes first fuse, the first reactor, the first N-type crystalline substance lock to refill road altogether Pipe, first contactor and triangle capacitance group, AC power pass through the output end and first fuse of fuse disconnecting switch One end connection, the other end of first fuse connect with one end of the first reactor, the other end of the first reactor respectively with First contactor, two the first N-type thyristor connections in parallel, the first contactor first N-type thyristor in parallel with two is simultaneously Connection, first contactor connect with triangle capacitance group, divides that refill road include second fuse, the second reactor, the second N-type crystalline substance lock Pipe, second contactor and star capacitance group, AC power by fuse disconnecting switch output end and second fuse One end connects, and the other end of second fuse connect with one end of the second reactor, and the other end of the second reactor is respectively with the Two contactors, two the second N-type thyristor connections in parallel, the second contactor second N-type thyristor in parallel with two is in parallel, Second contactor is connect with star capacitance group.

2. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that the exchange Power supply is connect by the output end of fuse disconnecting switch with arrester.

3. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that the total benefit The quantity in circuit is 6 groups.

4. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that described point of benefit The quantity in circuit is 4 groups.

5. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that the cabinet Top be arranged wind turbine.

6. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that the cabinet Cabinet door on be provided with control display, main switch, release the button, scram button, indicator light and dismountable see-through window.

7. a kind of high reliability integrated-type intelligent low-voltage capacitor box according to claim 1, which is characterized in that the cabinet Inside setting mounting hole and installation card slot.