CN219164239U - Workshop bus reactive power compensation device - Google Patents

Abstract

The utility model provides a workshop bus reactive power compensation device, which comprises: the box body is internally provided with a main switch, an intelligent controller, temperature and humidity acquisition equipment and an alternating current sampling module; the input end of the main switch is connected to the bus; the output end of the main switch is connected with a first passive compensation link; the first passive compensation link is connected with a first switching switch, a first reactor and a low-voltage power capacitor in series; the intelligent controller is respectively connected with the temperature and humidity acquisition equipment and the alternating current sampling module to acquire temperature and humidity information and bus phase voltage and phase current information. The workshop bus reactive power compensation device has the advantages of simple wiring, small occupied space, low cost, excellent performance, convenient overhaul and maintenance, and better intelligent effect and compensation effect.

Description

Workshop bus reactive power compensation device

Technical Field

The utility model relates to the field of low-voltage power distribution cabinets, in particular to a workshop bus reactive power compensation device.

Background

The power supply bus is a closed metal device formed by copper and aluminum bus columns and is used for distributing power to all power utilization elements of the distributed power grid. Wire and cable has been increasingly replaced in low voltage power transmission mains for workshops.

The electric loads in the low-voltage electric power used in workshops in the prior art, such as motors, transformers and the like, mostly belong to inductive reactance, and during operation, the corresponding reactive power needs to be provided for these devices. After capacitive devices such as a shunt capacitor and a synchronous regulator are installed in the power grid, part of reactive power consumed by the inductive reactance can be supplied. The small power grid power supply provides reactive power for the inductive load, namely reduces the flow of the reactive power in the power grid, so that the electric energy loss of the power transmission line caused by the delivery of the reactive power can be reduced, and the running condition of the power grid is improved. This is known as reactive compensation.

The existing trunk type power supply bus workshop is high in reactive power change speed, high in harmonic content, high in cost, low in performance and poor in effect due to the fact that equipment is continuously updated and improved, the capacity of newly-added equipment is increased, the inductive load is large, and the bus is high in harmonic content. And when the load is frequently fluctuated or lightly loaded, serious damage and damage are easily generated to the power equipment, and even accidents are easily generated.

Disclosure of Invention

The utility model provides a workshop bus reactive power compensation device which has the advantages of investment saving, convenience and practicability.

The device comprises: the box body is internally provided with a main switch, an intelligent controller, temperature and humidity acquisition equipment and an alternating current sampling module; the alternating current sampling module is arranged at the first section of the bus and is used for collecting phase voltage and phase current information of the bus;

the input end of the main switch is connected to the bus;

the output end of the main switch is connected with a first passive compensation link;

the first passive compensation link is connected with a first switching switch, a first reactor and a low-voltage power capacitor in series;

the intelligent controller is connected with the temperature and humidity acquisition equipment and the alternating current sampling module in a wireless communication mode respectively to acquire temperature and humidity information and bus phase voltage and phase current information.

The output end of the main switch is also connected with a second reactive compensation link;

the second reactive compensation link is connected with a second switching switch, a second reactor and a capacitor in series.

The end of the second reactive compensation link is provided with a second overload short-circuit protection device.

It should be further noted that the intelligent controller is provided with a man-machine display touch screen. The intelligent controller is also connected with a storage recording module.

It is further noted that a fan and a dehumidifier are arranged on the wall of the box body;

the intelligent controller is connected with the fan and the dehumidifier respectively and controls the operation of the fan and the dehumidifier based on the acquired temperature and humidity information.

It should be further noted that the end of the first passive compensation link is provided with a first overload short-circuit protection device.

The output end of the main switch is also connected with a third reactive compensation link;

and an overvoltage protection device is arranged on the third reactive compensation link.

From the above technical scheme, the utility model has the following advantages:

the reactive compensation device for the bus of the workshop is arranged on the bus of the workshop power supply, so that the influence of reactive power and harmonic waves in the bus on the bus can be effectively counteracted, the current carrying capacity of the bus can be improved, or the section of the bus can be reduced. The device provided by the utility model can play a role in bus reactive compensation, improve the power supply quality, improve the power factor of the power distribution network and the voltage of a terminal substation, and compensate the reactive loss of the main transformer.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a plant bus reactive power compensation device;

FIG. 2 is a schematic diagram of an embodiment of a plant bus reactive power compensation device;

FIG. 3 is a schematic view of the monitoring of the present utility model.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

The utility model provides a workshop bus reactive power compensation device, as shown in figures 1 to 3, comprising: the intelligent temperature and humidity acquisition device comprises a box body 1, wherein a main switch 2, an intelligent controller 3, temperature and humidity acquisition equipment 4 and an alternating current sampling module 5 are arranged in the box body 1; the alternating current sampling module 5 is arranged at the first section of the bus, acquires phase voltage and phase current information of the bus and relevant harmonic parameters, and wirelessly transmits the phase voltage and the phase current information and the relevant harmonic parameters to the intelligent controller 3.

The intelligent controller 3 is connected with the temperature and humidity acquisition equipment 4 and the alternating current sampling module 5 in a wireless communication mode respectively to acquire temperature and humidity information and bus phase voltage and phase current information.

The input end of the main switch 2 is connected to a bus; the output end of the main switch 2 is connected with a first reactive compensation link, a second reactive compensation link and a third reactive compensation link;

the first passive compensation link is connected with a first switching switch 6, a first reactor 7 and a low-voltage power capacitor 8 in series;

the second reactive compensation link is connected in series with a second switching switch 9, a second reactor 10 and a capacitor 11. The third reactive compensation link is provided with an overvoltage protection device 12.

Wireless communication means may include wireless local area networks (Wi-Fi, WLAN, wireless Local Area Networks), wireless broadband (Wibro), worldwide interoperability for microwave access (Wimax), high speed downlink packet access (HSDPA, high Speed Downlink Packet Access), and so forth.

The intelligent controller 3 is provided with a man-machine display touch screen 13 which can display different power parameters, harmonic content rate, distortion rate and the like. Various parameters can be displayed, corresponding data are dynamically provided according to actual bus parameters, and the operation of the switching switch is controlled according to the operation state. The intelligent controller 3 is also connected with a storage recording module 18, which can store the operation data of the device. The intelligent controller 3 can adopt a switch cabinet comprehensive measurement and control device. The comprehensive measurement and control device for the switch cabinets is used for 3-35 kV indoor switch cabinets and is suitable for various switch cabinets such as a centrally installed switchgear, a handcart cabinet, a fixed cabinet, a ring main unit and the like. The intelligent control system has the functions of primary loop simulation diagram, switch state indication, high-voltage electrified display, automatic temperature and humidity control, human body induction automatic illumination, voice prompt, electric parameter measurement, RS485 communication interface and the like, and integrates operation and display.

For protection, the end of the first passive compensation link is provided with a first overload short-circuit protection device 14. The end of the second reactive compensation link is provided with a second overload short-circuit protection device 15.

In this embodiment, the switching switch of the low-voltage capacitor (including the co-compensation and the sub-compensation) implements the co-compensation for the three-phase power supply and the split-phase compensation for the three-phase unbalanced power supply.

In the present embodiment, a fan 16 and a dehumidifier 17 are installed on the wall of the case 1; the user can set temperature and humidity threshold parameters according to the needs, and based on the acquired temperature and humidity information, the operation of the fan and the dehumidifier is controlled, and real-time control strip adjustment of temperature and humidity is realized.

The main switch 2, the intelligent controller 3, the temperature and humidity acquisition equipment 4, the alternating current sampling module 5, the switching switch, the reactor and the capacitor can be in a circuit form and a common model in the field, the specific model is not limited, and the corresponding circuit form and specific model can be expected based on the knowledge scope of the person skilled in the art to realize the functions of the utility model.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A workshop busbar reactive power compensation device, comprising: the box body is internally provided with a main switch, an intelligent controller, temperature and humidity acquisition equipment and an alternating current sampling module; the alternating current sampling module is arranged at the first section of the bus and is used for collecting phase voltage and phase current information of the bus;

the input end of the main switch is connected to the bus;

the output end of the main switch is connected with a first passive compensation link;

the first passive compensation link is connected with a first switching switch, a first reactor and a low-voltage power capacitor in series;

the intelligent controller is connected with the temperature and humidity acquisition equipment and the alternating current sampling module in a wireless communication mode respectively to acquire temperature and humidity information and bus phase voltage and phase current information.

2. The plant bus reactive compensation device according to claim 1, wherein,

the output end of the main switch is also connected with a second reactive compensation link;

the second reactive compensation link is connected with a second switching switch, a second reactor and a capacitor in series.

3. The plant bus reactive compensation device according to claim 1, wherein,

the intelligent controller is provided with a man-machine display touch screen.

4. The plant bus reactive compensation device according to claim 1, wherein,

a fan and a dehumidifier are arranged on the wall of the box body;

the intelligent controller is connected with the fan and the dehumidifier respectively and controls the operation of the fan and the dehumidifier based on the acquired temperature and humidity information.

5. The plant bus reactive compensation device according to claim 1, wherein,

the end of the first passive compensation link is provided with a first overload short-circuit protection device.

6. The plant bus reactive compensation device according to claim 2, wherein,

the end of the second reactive compensation link is provided with a second overload short-circuit protection device.

7. The plant bus reactive compensation device according to claim 1, wherein,

the output end of the main switch is also connected with a third reactive compensation link;

and an overvoltage protection device is arranged on the third reactive compensation link.

8. The plant bus reactive compensation device according to claim 1, wherein,

the intelligent controller is also connected with a storage recording module.

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