Hybrid reactive compensation cabinet body

Abstract

The utility model provides a hybrid reactive power compensation cabinet body, and belongs to the technical field of power electronics. The protection box body can be used for installing and protecting the reactive compensation module; the reactive power compensation module is arranged in the protection box body, comprises an SVG compensation unit, an SVC compensation unit and a controller, and is used for solving reactive power compensation in a power utilization system; the fixing base is fixedly connected to the side end of the protection box body and can be used for installing the dust blocking fence. The square fence grooves are formed in the side ends of the protection box body and the fixing base and can be used for protecting the air permeability in the box body. In the process of using the reactive power compensation module, the dust blocking fence can be taken out by pulling the connecting strip, after the surface of the dust blocking fence is cleaned, the dust blocking fence can slide into the sliding groove, meanwhile, the two first suction blocks are connected with the two second suction blocks in a matched mode, the dust blocking fence is installed and fixed, the reactive power compensation module does not need to be paused, and operation is convenient. And the heat dissipation fence can be directly cleaned, and the cleanliness of the heat dissipation fence can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power electronics technical field, concretely relates to a hybrid type reactive compensation cabinet body. BACKGROUND

[0002] Power electronics technology is a newly emerging electronic technology applied in the field of electric power, that is, the technology of using power electronic devices to transform and control electric energy. The reactive compensation cabinet plays a crucial role in improving power factor, increasing transmission capacity and power quality of the power grid.

[0003] In the conventional reactive compensation cabinet, two cabinets are usually required, two sets of mutual inductors for reactive compensation, two controllers, and two controllers for detecting circuit power quality. However, overcompensation may occur during use, and one group may be pushed off and undercompensation may occur. The frequent operation of the controller and the compensation components greatly reduces the service life of the equipment.

[0004] However, in the prior art, when the reactive compensation module is used, dust will adhere to the heat dissipation bars of the cabinet, which needs to be disassembled and cleaned to increase the cleanliness of the heat dissipation bars. However, the reactive compensation module needs to be stopped during disassembly, which affects the normal use of the reactive compensation module during operation. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a hybrid type reactive compensation cabinet, which aims to solve the problem that when the reactive compensation module is used, dust will adhere to the heat dissipation bars of the cabinet, which needs to be disassembled and cleaned to increase the cleanliness of the heat dissipation bars. However, the reactive compensation module needs to be stopped during disassembly, which affects the normal use of the reactive compensation module during operation. At the same time, the present scheme combines the functions of SVG compensation unit and SVC compensation unit to form a reactive compensation module, which is placed in a group of cabinets. On the basis of the SVC compensation unit, the performance advantages of the SVG compensation unit are increased.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A hybrid type reactive compensation cabinet, comprising a protection cabinet and a reactive compensation module, the protection cabinet is fixedly connected with a fixing seat on the side, the protection cabinet is provided with a square slot communicating with the fixing seat, the side end of the fixing seat is vertically provided with a sliding groove, the upper and lower closed ends of the sliding groove are provided with a circular groove not communicating with it, the circular groove is fixedly connected with two second suction blocks, the sliding groove is provided with a dust blocking bar, the side of the dust blocking bar is fixedly provided with a connecting strip, the side end of the connecting strip is fixedly connected with two first suction blocks, and the two first suction blocks are respectively slidably connected in the two circular grooves.

[0008] As an optimal scheme of the utility model, the reactive power compensation module is arranged in the protection box and comprises an SVG compensation unit, an SVC compensation unit and a controller, the SVG compensation unit and the SVC compensation unit are electrically connected with the controller, the controller is also electrically connected with the power grid, the power grid current and voltage are collected, the SVG compensation unit and the SVC compensation unit are controlled to implement reactive power compensation for the power grid, the SVG compensation unit comprises a self-commutated bridge circuit composed of high-power power electronic devices IGBT and capacitors, the SVG compensation unit is connected to the power grid through a series inductance switch, the SVC compensation unit comprises a thyristor switched capacitor circuit composed of thyristors and capacitors, and the capacitors in the SVC compensation unit are connected in two modes of common compensation and partial compensation.

[0009] As an optimal scheme of the utility model, the side end of the protection box is fixedly connected with a mounting seat through bolts, and the side end of the mounting seat is fixedly connected with a baffle.

[0010] As an optimal scheme of the utility model, the side end of the protection box is rotatably connected with two switch doors, and the surfaces of the two switch doors are both provided with transparent plates.

[0011] As an optimal scheme of the utility model, the side end of the protection box is fixedly connected with a mounting plate, and one end of the mounting plate is fixedly connected with a temperature sensor.

[0012] As an optimal scheme of the utility model, the side end of the protection box is fixedly connected with a protection box, and a connecting hole is arranged in the protection box.

[0013] As an optimal scheme of the utility model, the lower end of the protection box is fixedly connected with four supporting seats, and the two first suction blocks and the two second suction blocks are matched with each other.

[0014] A use method of the hybrid reactive power compensation cabinet body comprises the following steps:

[0015] S1, the controller of the reactive power compensation module is fixed to the door plate of the corresponding protection box, the current reactive power of the power grid is obtained through the monitoring unit of the controller, and the controller selects the compensation mode matched with the current reactive power of the power grid to work according to the current reactive power of the power grid;

[0016] S2, according to the compensation mode adopted in step S1, the reactive power generated by the load of the device is preferentially compensated by the SVC compensation unit, and the dynamic process and the compensation difference of the SVC compensation unit are supported by the SVG compensation unit;

[0017] S3. During the use of the reactive power compensation module, the dust baffle can be removed by pulling the connecting strip. After cleaning the surface of the dust baffle, it can be slid into the slide groove. At the same time, the two first suction blocks and the two second suction blocks are connected to each other to achieve the installation and fixation of the dust baffle. It is not necessary to stop the reactive power compensation module and directly clean the heat sink.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. By combining the functions of the SVG compensation unit and the SVC compensation unit to form a reactive power compensation module and placing it in a cabinet, the performance advantages of the SVG compensation unit are added on the basis of the SVC compensation unit. The reactive power generated by the load is first compensated by the SVC compensation unit, and the dynamic process and the compensation difference of the SVC compensation unit are supported by the SVG compensation unit, which avoids the over-compensation and under-compensation of the device. At the same time, it also improves the frequent operation of the controller and the components that perform compensation, thus reducing the service life of the equipment.

[0020] 2. In this solution, during the use of the reactive power compensation module, the dust baffle can be removed by pulling the connecting strip. After cleaning the surface of the dust baffle, it can be slid into the slide groove. At the same time, the two first suction blocks and the two second suction blocks are connected to each other to achieve the installation and fixation of the dust baffle. There is no need to stop the reactive power compensation module, and the heat dissipation rail can be cleaned directly, which can effectively increase the cleanliness of the heat dissipation rail.

[0021] 3. In this solution, the baffle installed on the side of the protective box can be used to prevent rain and snow from entering the square groove; the temperature sensor installed on the surface of the protective box can be used to sense the temperature inside the protective box, making it easier for workers to judge the condition inside the protective box; and the transparent plate installed on the surface of the opening and closing door can make it easy for workers to observe the inside of the protective box from the outside. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a perspective view of the present utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is an enlarged view of the dust barrier in this utility model;

[0026] Figure 4 This is a cross-sectional view of the protective box in this utility model;

[0027] Figure 5 It is an enlarged view of the fixing seat in the utility model;

[0028] Figure 6 It is a partial enlarged view of A in the utility model.

[0029] In the figure: 1, protection box; 2, switch door; 3, transparent plate; 4, support seat; 5, mounting plate; 6, temperature sensor; 7, protection box; 8, baffle; 9, mounting seat; 10, reactive power compensation module; 11, fixing seat; 12, sliding groove; 13, dust baffle; 14, connecting strip; 15, first suction block; 16, square slot; 17, round groove; 18, second suction block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1-6 The utility model provides the following technical scheme:

[0033] A mixed type reactive power compensation cabinet body, include: protection box 1 and reactive power compensation module 10, protection box 1 side fixedly connected with fixing seat 11, protection box 1 is set with the square slot 16 of communication with fixing seat 11, the vertical sliding groove 12 of fixing seat 11 is set in the side end, the upper and lower closed end of sliding groove 12 is set with the round groove 17 not with its communication, two second suction blocks 18 are fixedly connected in round groove 17, and dust baffle 13 is slidably arranged in sliding groove 12, the side of dust baffle 13 is fixed with connecting strip 14, the side end of connecting strip 14 is fixedly connected with two first suction blocks 15, and two first suction blocks 15 are slidably connected in two round grooves 17 respectively;

[0034] The reactive power compensation module 10 is arranged in the protection box 1 and comprises an SVG compensation unit, an SVC compensation unit and a controller, the SVG compensation unit and the SVC compensation unit are electrically connected with the controller, the controller is also electrically connected with the power grid, the current and the voltage of the power grid are collected, the SVG compensation unit and the SVC compensation unit are controlled to compensate the reactive power of the power grid, the SVG compensation unit comprises a self-commutated bridge circuit composed of high-power power electronic devices IGBT and capacitors, the SVG compensation unit is connected to the power grid through a series inductor and a switch, the SVC compensation unit comprises a thyristor switched capacitor circuit composed of thyristors and capacitors, the switching action of the SVC compensation unit is realized by the combination of the thyristors and the switch, and the capacitors in the SVC compensation unit are compensated in two modes of common compensation and separate compensation.

[0035] As shown in Figure 1 , the functions of the SVG compensation unit and the SVC compensation unit are combined together, the performance advantages of the SVG compensation unit are added on the basis of the SVC compensation unit, the reactive power generated by the load is compensated by the SVC compensation unit first, the dynamic process and the compensation difference of the SVC compensation unit are supported by the SVG compensation unit, and the device supports three modes of three-phase separate compensation, three-phase common compensation and hybrid compensation, wherein the controller mainly comprises a liquid crystal decorative plate, a fixed plate and a YD-DWB assembly, the controller first collects the voltage and the current of the power grid, calculates the current reactive power of the power grid, sends a control signal to the SVG compensation unit first, controls the current on the alternating current side of the SVG compensation unit, so that the SVG compensation unit absorbs or emits the required reactive current, and realizes the purpose of dynamic reactive power compensation, and then sends a switching signal to the SVC compensation unit to control the switching action of the thyristor switched capacitor circuit, thereby implementing reactive power compensation.

[0036] As shown in Figure 2 , the side end of the protection box 1 is fixedly connected with a mounting seat 9, and the baffle 8 can be mounted on the surface of the protection box 1. The side end of the mounting seat 9 is fixedly connected with a baffle 8, which can block the influence of rain and snow on the fixing seat 11.

[0037] As shown in Figure 1 , the side end of the protection box 1 is rotatably connected with two switch doors 2, which can facilitate workers to open the protection box 1. The surface of the two switch doors 2 is provided with a transparent plate 3, which can facilitate workers to observe the condition of the reactive power compensation module 10 in the protection box 1.

[0038] As shown in Figure 1 , the side end of the protection box 1 is fixedly connected with a mounting plate 5, and the temperature sensor 6 can be mounted on the surface of the protection box 1. One end of the mounting plate 5 is fixedly connected with the temperature sensor 6, which can be used for sensing the temperature in the protection box 1.

[0039] As shown in Figure 1As shown, the side end of the protection box body 1 is fixedly connected with a protection box 7, which can be used for protecting the electric control box.

[0040] As shown in Figure 1 , Figure 3 and Figure 6 , the lower end of the protection box body 1 is fixedly connected with four support seats 4, which can be used for stably supporting the protection box body 1. The two first suction blocks 15 and the two second suction blocks 18 cooperate with each other to install the dust blocking bar 13 in the fixed seat 11.

[0041] The use process of the utility model is: the controller of the reactive power compensation module 10 is fixed to the door plate of the corresponding protection box body 1, the current reactive power of the power grid is obtained through the monitoring unit of the controller, according to the current reactive power of the power grid, the controller will select the compensation mode matched with the current reactive power of the power grid to work; after adopting the appropriate compensation mode, the reactive power generated by the load of the device is preferentially compensated by the SVC compensation unit, and the dynamic process and the compensation difference of the SVC compensation unit are supported by the SVG compensation unit.

[0042] In the process of using the reactive power compensation module 10, the dust blocking bar 13 is taken out by pulling the connecting strip 14, after the surface of the dust blocking bar 13 is cleaned, the dust blocking bar 13 can be slid into the sliding groove 12, and the two first suction blocks 15 are connected with the two second suction blocks 18 respectively, so as to achieve the installation and fixation of the dust blocking bar 13, without stopping the reactive power compensation module 10, the heat dissipation bar can be directly cleaned.

[0043] Finally, it should be pointed out that: the above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A hybrid var compensation cubicle for var compensation regulation of an electrical grid, characterized in that, The mixed type reactive compensation cabinet body comprises a protection box (1) and a reactive compensation module (10), the protection box (1) is fixedly connected with a fixing seat (11) on the side, the protection box (1) is provided with a square slot (16) communicated with the fixing seat (11), the side end of the fixing seat (11) is vertically provided with a sliding groove (12), the upper and lower closed ends of the sliding groove (12) are provided with circular grooves (17) not communicated with them, the circular grooves (17) are fixedly connected with two second suction blocks (18), the sliding groove (12) is slidably provided with a dust baffle (13), the side of the dust baffle (13) is fixedly provided with a connecting strip (14), the side end of the connecting strip (14) is fixedly connected with two first suction blocks (15), and the two first suction blocks (15) are slidably connected in the two circular grooves (17) respectively. The reactive compensation module (10) is arranged in the protection box (1) and comprises an SVG compensation unit, an SVC compensation unit and a controller, the SVG compensation unit and the SVC compensation unit are electrically connected with the controller, the controller is also electrically connected with a power grid, the current and voltage of the power grid are collected, the SVG compensation unit and the SVC compensation unit are controlled to compensate the reactive power of the power grid, the SVG compensation unit comprises a high-power power electronic device IGBT and a capacitor to form a self-commutation bridge circuit, the SVG compensation unit is connected to the power grid through a series inductance switch, the SVC compensation unit comprises a thyristor and a capacitor to form a thyristor switched capacitor circuit, and the capacitor in the SVC compensation unit adopts two compensation modes of common compensation and separate compensation.

2. A hybrid var compensation cabinet according to claim 1, characterized in that: The switching action of the SVC compensation unit is realized by a combination of thyristors and switches, and the thyristors and switches are connected in two compensation modes of common compensation and separate compensation.

3. A hybrid var compensation cabinet according to claim 1, characterized in that: The side end of the protection box (1) is fixedly connected with a mounting seat (9) through bolts, and the side end of the mounting seat (9) is fixedly connected with a baffle (8).

4. A hybrid var compensation cabinet according to claim 3, characterized in that: The side end of the protection box (1) is rotatably connected with two switch doors (2), and the surfaces of the two switch doors (2) are provided with transparent plates (3).

5. A hybrid var compensation cabinet according to claim 4, characterized in that: The side end of the protection box (1) is fixedly connected with a mounting plate (5), and one end of the mounting plate (5) is fixedly connected with a temperature sensor (6).

6. A hybrid var compensation cabinet according to claim 5, characterized in that: The side end of the protection box (1) is fixedly connected with a protection box (7), and the protection box (7) is provided with a connecting hole.

7. A hybrid var compensation cabinet according to claim 6, characterized in that: The lower end of the protection box (1) is fixedly connected with four supporting seats (4), and the two first suction blocks (15) and the two second suction blocks (18) are matched with each other.

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