CN215580396U

CN215580396U - Integrated intelligent power capacitor

Info

Publication number: CN215580396U
Application number: CN202121749024.9U
Authority: CN
Inventors: 王广帅; 何亚钢; 刘潇
Original assignee: Shaanxi Dechuang Jinshi Technology Co ltd
Current assignee: Shaanxi Dechuang Jinshi Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-18
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses an integrated intelligent power capacitor which comprises a metal shell, a secondary sampling mutual inductor, a reactive power controller and a power capacitor, wherein the secondary sampling mutual inductor, the reactive power controller and the power capacitor are integrated in the metal shell together, the input end of the secondary sampling mutual inductor is electrically connected with a power line, the power line is electrically connected with a three-phase circuit in a power grid system, three live wires and three zero wires in the power line are respectively provided with a miniature circuit breaker, three live wires in the power line are provided with a magnetic latching relay, the power capacitor is provided with a plurality of power capacitors, and the power capacitors are connected in series. The integrated intelligent power capacitor is small in size, easy to transport, carry and install, light in weight, free of inrush current during switching, unique in control mode, and capable of enabling each device to be a host, enabling individual devices to automatically quit after faults occur, and not influencing the work of other devices.

Description

Integrated intelligent power capacitor

Technical Field

The utility model relates to the technical field of low-voltage reactive power compensation, in particular to an integrated intelligent power capacitor.

Background

In the low voltage reactive power compensation industry, a conventional compensation device is composed of a reactive power controller, a fuse (or a miniature circuit breaker), an ac contactor (or a thyristor switch), and a power capacitor. The working principle is as follows: the reactive power controller calculates the required reactive power by collecting voltage and current signals of a power grid system, and further determines which capacitor is to be put into or cut off. The specific method comprises the following steps: the controller sends a switching command to the alternating current contactor (or the thyristor switch), the alternating current contactor can execute the opening or closing action, the capacitor is cut off when the alternating current contactor is opened, and the capacitor is put into use when the alternating current contactor is closed.

The existing compensation mode is used in a complete set device, belongs to split installation, and has the disadvantages of complicated installation steps, time consumption and wire consumption; the occupied space is large, the weight is large, and the installation and the transportation are not easy; later transformation or capacity increase is very difficult, so an integrated intelligent power capacitor is provided.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an integrated intelligent power capacitor, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that:

an integrated intelligent power capacitor comprises a metal shell, a secondary sampling mutual inductor, a reactive power controller and a power capacitor, the secondary sampling mutual inductor, the reactive power controller and the power capacitor are integrated in the metal shell together, the input end of the secondary sampling mutual inductor is electrically connected with a power line, the power line is electrically connected with a three-phase circuit in a power grid system, miniature circuit breakers are arranged on three live wires and a zero wire in the power line, magnetic latching relays are arranged on the three live wires in the power line, the power capacitors are provided with a plurality of power capacitors which are connected in series, the input ends of the power capacitors are electrically connected with power lines, the power line is electrically connected with three circuits in a power grid system, and a communication network line is arranged between the secondary sampling mutual inductor and one power capacitor.

Preferably, the power line is a BVR (BVR) wire, and the nominal cross section of the power line is not less than 1.5mm²。

Preferably, the power line is a BVR electric wire, and the nominal cross section of the power line is not less than 25mm²。

Preferably, a data acquisition module DAM-V2 is arranged in the secondary sampling mutual inductor, four normally open contacts UA, UB, UC and UK are arranged in the secondary sampling mutual inductor, and the normally open contacts UA, UB and UC are respectively and electrically connected with three magnetic latching relays.

Preferably, the power capacitor is provided with two communication ports T1, T2, the T2 communication port of one power capacitor being electrically connected with the T1 communication port of the other power capacitor.

Preferably, a communication port T is arranged in the secondary sampling transformer, and the communication network cable is electrically connected with the communication port T and a T1 communication port of a power capacitor.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the integrated intelligent power capacitor, the switching switch is improved, the traditional contactor is upgraded into the magnetic latching relay, the control precision and the control means are improved, the input inrush current is eliminated, the arc cutting is avoided, and the service lives of the power capacitor and the switching switch are greatly prolonged;

2. according to the integrated intelligent power capacitor, each power capacitor can independently form a compensation system through the special integration effect of the reactive power controller and the miniature circuit breaker, so that a wiring part for controlling the switching switch by the reactive power controller is omitted, and the working time and the line are saved;

3. aiming at the defects of the existing compensation device, the reactive power controller, the miniature circuit breaker, the magnetic latching relay and the power capacitor are perfectly combined into a whole and integrated into a metal shell, after the integration is carried out by the scheme, the volume and the weight are reduced by two thirds, the wires and nodes required by connection are reduced by 80 percent, and the production time is reduced by 60 percent.

Drawings

FIG. 1 is a schematic circuit diagram of an integrated intelligent power capacitor according to the present invention;

fig. 2 is a schematic wiring diagram of a conventional compensation mode.

In the figure: 1. a metal housing; 2. a secondary sampling transformer; 3. a reactive power controller; 4. a power capacitor; 5. a power line; 6. a communication network cable; 7. a power line; 8. a magnetic latching relay; 9. a miniature circuit breaker.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, an integrated intelligent power capacitor comprises a metal housing 1, a secondary sampling transformer 2, reactive power controller 3 and power capacitor 4, secondary sampling mutual-inductor 2, reactive power controller 3 and power capacitor 4 are integrated inside metal casing 1 jointly, secondary sampling mutual-inductor 2 input electric connection has power cord 5, three-phase circuit electric connection among power cord 5 and the electric wire netting system, all be provided with miniature circuit breaker 9 on three live wires and the zero line in the power cord 5, be provided with magnetic latching relay 8 on three live wires in the power cord 5, power capacitor 4 is provided with a plurality of, all establish ties each other between a plurality of power capacitor 4, the equal electric connection of the 4 input of a plurality of power capacitor has power line 7, three circuit electric connection among power line 7 and the electric wire netting system, be provided with communication network line 6 between secondary sampling mutual-inductor 2 and a power capacitor 4.

Preferably, the power line 5 is a BVR wire, and the nominal cross-section of the power line 5 is ≧ 1.5mm²The power supply line 5 is a secondary line.

Preferably, the power line 7 is a BVR wire, and the nominal cross section of the power line 7 is not less than 25mm²The power line 7 is a secondary line.

Preferably, a data acquisition module DAM-V2 is arranged in the secondary sampling transformer 2, four normally open contacts UA, UB, UC and UK are arranged in the secondary sampling transformer 2, the normally open contacts UA, UB and UC are respectively and electrically connected with three magnetic latching relays 8, and the magnetic latching relays 8 and the data acquisition module DAM-V2 are all in the prior art.

Preferably, the power capacitor 4 is provided with two communication ports T1, T2, the T2 communication port of one power capacitor 4 being electrically connected with the T1 communication port of the other power capacitor 4.

Preferably, the secondary sampling transformer 2 is provided with a communication port T, and the communication network cable 6 is electrically connected with the communication port T and a T1 communication port of the power capacitor 4.

It should be noted that, the utility model is an integrated intelligent power capacitor, the current signal of the power grid system is collected to the reactive power controller 3 through the DAM-V2 in the secondary sampling mutual inductor 2, the reactive power controller 3 obtains the requirement of the power grid system for the reactive power through calculation, and then sends a control signal to control the switching of the magnetic latching relay 8, in the switching process, the reactive power controller 3 can automatically judge the voltage zero point and the current zero point, and can control the switch to switch into the power capacitor 4 at the voltage zero point, and cut off the power capacitor at the current zero point, thereby achieving the zero crossing switching, and ensuring that no inrush current and arc exist in the switching process of the power capacitor 4; each power capacitor 4 has a control function, after networking is carried out through a network cable, one power capacitor 4 can be set as a host, other power capacitors 4 are extension sets, if some sub-sets have faults, the sub-sets can automatically exit, and the normal work of other loops is not influenced; in the use process, only the primary wire needs to be connected, and the secondary wire is plugged and pulled out through the network cable, so that the wire connection is convenient and the use is convenient; through the improvement of the fling-cut switch, the traditional contactor is upgraded into the magnetic latching relay 8, the control precision and the control means are improved, the input inrush current is eliminated, the electric arc is prevented from being cut off, and the service lives of the power capacitor 4 and the fling-cut switch are greatly prolonged; by the special integration effect of the reactive power controller 3 and the miniature circuit breaker 9, each power capacitor 4 can independently form a compensation system, a wiring part for controlling the switching switch by the reactive power controller 3 is omitted, and the working hours and the wires are saved; aiming at the defects of the existing compensation device, the reactive power controller 3, the miniature circuit breaker 9, the magnetic latching relay 8 and the power capacitor 4 are perfectly combined into a whole and integrated into a metal shell 1, after the integration is carried out by the scheme, the volume and the weight are reduced by two thirds, the wires and the nodes required by connection are reduced by 80 percent, and the production man-hour is reduced by 60 percent.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an integrated form intelligence power capacitor, includes metal casing (1), secondary sampling mutual-inductor (2), reactive power controller (3) and power capacitor (4), its characterized in that: the secondary sampling mutual inductor (2), the reactive power controller (3) and the power capacitor (4) are integrated in the metal shell (1) together, the input end of the secondary sampling mutual inductor (2) is electrically connected with a power line (5), the power line (5) is electrically connected with a three-phase circuit in a power grid system, three live wires and three zero wires in the power line (5) are provided with miniature circuit breakers (9), magnetic latching relays (8) are arranged on three live wires in the power wire (5), the power capacitors (4) are arranged in a plurality, the power capacitors (4) are connected in series, the input ends of the power capacitors (4) are electrically connected with power lines (7), the power line (7) is electrically connected with three circuits in a power grid system, and a communication network line (6) is arranged between the secondary sampling mutual inductor (2) and one power capacitor (4).

2. An integrated smart power capacitor as claimed in claim 1, wherein: the power line (5) is a BVR electric wire, and the nominal section of the power line (5) is not less than 1.5mm²。

3. An integrated smart power capacitor as claimed in claim 1, wherein: the power line (7) is a BVR electric wire, and the nominal section of the power line (7) is not less than 25mm²。

4. An integrated smart power capacitor as claimed in claim 1, wherein: be provided with data acquisition module DAM-V2 in secondary sampling mutual-inductor (2), be provided with four normally open contacts UA, UB, UC and UK in secondary sampling mutual-inductor (2), normally open contact UA, UB, UC respectively with three magnetic latching relay (8) electric connection.

5. An integrated smart power capacitor as claimed in claim 1, wherein: the power capacitors (4) are provided with two communication ports T1, T2, the T2 communication port of one power capacitor (4) being electrically connected with the T1 communication port of the other power capacitor (4).

6. An integrated smart power capacitor as claimed in claim 1, wherein: the secondary sampling mutual inductor (2) is provided with a communication port T, and the communication network cable (6) is electrically connected with the communication port T and a T1 communication port of the power capacitor (4).