CN202059181U - Reactive power compensation box body - Google Patents

Abstract

A reactive power compensation box belongs to the technical field of devices for adjusting, eliminating or compensating reactive power in a network, and in particular relates to a reactive power compensation box. The utility model provides a reactive power compensation box body which has good ventilation effect and can effectively prevent dust from entering. The utility model comprises a box body. The bottom plate of the box body is provided with at least one air inlet with a dust-proof filter, the top plate of the box body is a hollow shell, and the middle part of the bottom surface of the shell is provided with at least one There is an air guide hole, and at least one air outlet hole communicating with the outside of the box is provided on the periphery of the bottom surface of the casing; louvers are arranged on the side plates of the box, and fans are arranged in the box corresponding to the louvers.

Description

A reactive power compensation box

technical field

According to the International Patent Classification (IPC), the utility model belongs to the Department of Electricity, the major category of power generation, power transformation or distribution, the small category of circuit devices or systems for power supply or distribution, and the large group of circuit devices for AC trunk lines or AC power distribution networks. , The technical field of a device group for adjusting, eliminating or compensating reactive power in a network, especially relates to a reactive power compensation box.

Background technique

Because of its convenient installation and maintenance, the box-type reactive power compensation device is not limited by the location of the substation room. It is widely used in indoor substations and transformed substations with tight space, and is used to adjust the reactive power balance of the power grid and improve power factor played a huge role.

Due to the lack of effective ventilation measures in the existing reactive power compensation box, the temperature in the box is too high, resulting in an increase in the failure rate of the capacitor bank. However, when the cabinet meets the ventilation conditions, due to no dust-proof measures, dust deposits in the cabinet, causing equipment insulation flashovers to occur from time to time.

Contents of the invention

The utility model aims at the above problems, and provides a reactive power compensation box with good ventilation effect and effective prevention of dust from entering.

In order to achieve the above object, the utility model adopts the following technical scheme. The utility model includes a box body. The bottom plate of the box body is provided with at least one air inlet with a dustproof filter screen. The top plate of the box body is a hollow shell. The middle part of the bottom surface of the casing is provided with at least one air guide hole communicating with the box body, and the periphery of the bottom surface of the casing is provided with at least one air outlet hole communicating with the outside of the box body; louvers are arranged on the side plates of the box body, corresponding to the A fan is arranged in the box.

As a preferred solution, the combination of the louvers and the fan in the utility model is two groups.

As another preferred solution, the fans of the group described in the utility model are respectively connected to the first thermostat and the second thermostat through the first fan relay, and the fans of the other group are respectively connected to the second thermostat through the second fan relay. The first temperature controller and the second temperature controller are connected; the first temperature controller is connected with the alarm relay and the trip relay respectively, and the second temperature controller is connected with the alarm relay and the trip relay respectively; the alarm relay and the trip relay are respectively connected with the controller connected, the controller is connected with the capacitor opening and closing circuit breaker.

As another preferred solution, the box body of the utility model is made of galvanized sheet.

In addition, the side panels of the present invention include an inner panel and an outer panel, and rock wool is filled between the inner panel and the outer panel.

The beneficial effects of the utility model: (1) The ventilation effect is good. The utility model adopts the technical scheme of combining natural ventilation and forced air exhaust, natural ventilation through air inlets, air guide holes, and air outlet holes, and forced air exhaust through air inlets, motors, and shutters. Moreover, there is at least one air inlet, air guiding hole, and air outlet, so that the natural ventilation in the box is smooth.

(2) There is less dust in the box. The air inlet of the utility model is provided with a dust-proof filter; the louvers can be set in a drooping state, and the louvers can only be opened when the fan exhausts the air, that is, the louvers only exhaust the air but not enter the air; the air outlet holes are arranged on the bottom surface of the roof shell up, that is, the air outlet faces down. Any opening of the utility model that communicates with the outside is not easy for dust to enter like this, so there is less dust in the utility model box.

(3) The box body of the utility model is made of galvanized sheet, and the anti-corrosion performance is greatly enhanced.

(4) Rock wool is filled between the inner panel and the outer panel of the utility model, and the heat insulation effect of the box body is better, so that the temperature in the box body will not rise too quickly when exposed to direct sunlight.

Description of drawings

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not intended to limit the present utility model.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the bottom plate of the utility model.

Fig. 3 is a schematic diagram of the roof structure of the utility model.

Fig. 4 is a functional block diagram of the fan control circuit of the utility model.

In the figure, 1 is the civil foundation, 2 is the bottom plate, 3 is the side plate, 4 is the roof plate, 5 is the fan, 6 is the shutter, 7 is the air inlet, 8 is the dust filter, 9 is the air guide hole, and 10 is the outlet wind hole.

Detailed ways

As shown in the figure, the utility model includes a box body, the bottom plate 2 of the box body is provided with at least one air inlet 7 with a dustproof filter screen 8, the top plate 4 of the box body is a hollow shell, and the middle part of the bottom surface of the shell body is provided with At least one air guide hole 9 communicating with the box body, at least one air outlet hole 10 communicating with the box body is provided on the periphery of the bottom surface of the casing; the side plate 3 of the box body is provided with louvers 6, corresponding to the box of the louvers 6 The body is provided with a blower fan 5 .

The combination of the louvers 6 and the fans 5 is two groups.

The fans 5 of one group are respectively connected with the first thermostat and the second thermostat through the first fan relay, and the fans 5 of the other group are respectively connected with the first thermostat and the second thermostat through the second fan relay. The first thermostat is connected with the alarm relay and the trip relay respectively, and the second thermostat is connected with the alarm relay and the trip relay respectively; connected to the device.

The forced air exhaust of the utility model can be divided into two stages: two fans 5 running and four fans 5 running simultaneously. The exhaust channels are physically independent of each other. Forced air exhaust can be completed by four sets of 100W axial fans with a capacity of 100W at the upper end of the reactor in the box of the utility model, and the four fans 5 are respectively controlled by two groups of temperature controllers. The fan can be directly arranged at the position closest to the reactor, which greatly improves the exhaust efficiency.

The box body is made of galvanized sheet. The frame, door panels, and top panels of the box body can all be treated with galvanized sheet spray paint and anticorrosion treatment, and the base is welded with square steel as a whole with hot-dip galvanized anticorrosion treatment, and the performance is greatly enhanced.

The side board 3 includes an inner board and an outer board, and rock wool is filled between the inner board and the outer board.

The utility model can be arranged on the civil foundation 1 of long battlement shape.

The ventilation process of the utility model is illustrated below in conjunction with the accompanying drawings: when the surrounding temperature of the capacitor bank in the casing was low, the ventilation in the casing was completed by the ventilation passage formed by the air inlet 7, the air guide hole 9, and the air outlet 10. When the thermostat detects that the air temperature around the capacitor bank reaches the set temperature (35°C), the first group of fans 5 will start automatically, and when the air temperature in the box is lower than 30°C after the fan 5 starts, the first group of fans 5 will automatically exit ; If the air temperature around the capacitor continues to rise after the first group of fan 5 is started, when the temperature around the capacitor is greater than 40°C, the second group of fan 5 is started, and after the second group of fan 5 is running, the temperature around the capacitor is less than 35°C, and the second group The fan 5 automatically stops running; if the temperature around the capacitor in the box continues to rise after the two sets of fans 5 are running at the same time, when the temperature reaches 45°C, the thermostat will sound a whistle alarm, and when the temperature is lower than 45°C, the whistle will automatically Release; when the air temperature around the capacitor reaches 50°C, the thermostat sends an over-temperature alarm signal to the controller, and the controller controls the capacitor to open and close the circuit breaker to cut off the capacitor. When the capacitor quits operation and the temperature returns to 40°C , the controller controls the capacitor to open and close the circuit breaker to close, and the capacitor resumes operation. In this way, the temperature rise of the junctions between the busbars in the box and the junctions in the main circuit does not exceed 50°C, ensuring the ventilation of the small room of the series reactor, and the temperature inside the box is below 40°C in summer.

The above content is a further detailed description of the utility model in conjunction with specific preferred embodiments. It cannot be determined that the specific implementation of the utility model is only limited to these descriptions. Under the premise of the concept of the utility model, some simple deduction or replacement can also be made, which should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims (5)

1. reactive power compensation casing, comprise casing, the base plate (2) that it is characterized in that casing is provided with at least one air inlet with dustproof filter screen (8) (7), the top board of casing (4) is a hollow housing, the middle part of housing bottom surface be provided with at least one with casing in the air-guiding hole (9) that communicates, the periphery of housing bottom surface is provided with the exhaust vent (10) that at least one and casing are interlinked to the outside; The side plate of casing (3) is provided with shutter (6), is provided with blower fan (5) in the casing corresponding to shutter (6).

2. according to the described a kind of reactive power compensation casing of claim 1, what it is characterized in that described shutter (6) and blower fan (5) is combined as two groups.

3. according to the described a kind of reactive power compensation casing of claim 2, it is characterized in that described one group blower fan (5) links to each other with first thermostat, second thermostat respectively by the first blower fan relay, the blower fan of another group (5) links to each other with first thermostat, second thermostat respectively by the second blower fan relay; First thermostat links to each other with alarm relay, tripping relay respectively, and second thermostat links to each other with alarm relay, tripping relay respectively; Alarm relay, tripping relay link to each other with controller respectively, and controller links to each other with capacitor divide-shut brake circuit breaker.

4. according to the described a kind of reactive power compensation casing of claim 1, it is characterized in that described casing adopts galvanized sheet to make.

5. according to the described a kind of reactive power compensation casing of claim 1, it is characterized in that described side plate (3) comprises interior plate and outer panel, is filled with rock wool between interior plate and the outer panel.

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