SVG dynamic reactive power compensation device

Abstract

The utility model relates to the technical field of reactive power compensation devices, and discloses an SVG dynamic reactive power compensation device, which comprises an SVG dynamic reactive power compensation device and a cover plate arranged at the top end of the SVG dynamic reactive power compensation device. A temperature sensor of the SVG dynamic reactive power compensation device carries out temperature monitoring on the interior of the SVG dynamic reactive power compensation device, and a Z-shaped shunting plate provided with shunting grooves and air holes is used for shunting wind so as to ensure that heat dissipation wind blown into the SVG dynamic reactive power compensation device is relatively uniform. The diaphragm type pressure sensor detects the air pressure in the SVG dynamic reactive power compensation device, the rotation speed of the blowing fan is mainly reduced by reducing the air flow speed to reduce the air pressure, and the arranged grid barrier strips force the air flow speed to be reduced, so that the air pressure is reduced, and parts in the SVG dynamic reactive power compensation device can be effectively protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of reactive compensation device, concretely is a kind of SVG dynamic reactive compensation device. BACKGROUND

[0002] SVG dynamic reactive compensation device is a kind of modernization equipment for adjusting reactive power in power system. It is mainly used to improve the power factor of power system, reduce the fluctuation of reactive power in system, and effectively control voltage, especially in the case of load change or large system fluctuation, can quickly respond to demand, and carry out dynamic reactive power compensation;SVG provides or absorbs reactive power in real time by quickly switching power electronic switch, control and parallel capacitor or inductor unit of grid, when the demand of reactive power in grid increases, SVG absorbs excess reactive power;When the demand of reactive power in grid decreases, SVG releases reactive power to compensate;Dynamic response: compared with traditional reactive power compensation equipment (such as capacitor bank), an important feature of SVG is that it can provide fast dynamic response. It can adjust output within milliseconds, and can adjust in time under the condition of load change, system fluctuation or voltage instability, so as to realize efficient reactive power compensation;Control mode: SVG uses advanced control algorithm, such as pulse width modulation (PWM) control technology, to accurately control the output of reactive power according to grid voltage, frequency and load change. In this way, SVG can accurately adjust the reactive power under different working conditions, and ensure that the power factor of system is in the best range.

[0003] The existing SVG dynamic reactive compensation device is used to improve the power factor of industrial power when used, and the SVG dynamic reactive compensation device is usually used in cooperation with automatic capacitor compensator. The automatic capacitor compensator provides good compensation for constant reactive demand, can improve the power factor, and the static reactive generator can make up for the deficiency of capacitor under rapidly changing load, to avoid voltage fluctuation caused by excessive compensation or insufficient compensation. However, in actual use, the SVG dynamic reactive compensation device is internally provided with a sensor, which monitors various items of power system by using the sensor. After long-term use, the working temperature of the sensor is too high, which can cause the working temperature to exceed the design range, resulting in overheating. The overheating of the sensor can cause the precision to decrease, the response to delay, and even the sensor to be burned out, which affects the performance of the whole SVG device, causes equipment failure and system shutdown, and is inconvenient to use.

[0004] Therefore, we propose a kind of SVG dynamic reactive compensation device to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model discloses a purpose at providing a kind of SVG dynamic reactive compensation device, to solve the sensor inside SVG dynamic reactive compensation device in the above background technology proposes, will not lead to equipment failure due to not timely heat dissipation.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of SVG dynamic reactive compensation device, including SVG dynamic reactive compensation device and the cover plate being installed at the top of SVG dynamic reactive compensation device, the outer surface of the SVG dynamic reactive compensation device is equipped with heat dissipation air duct, the outer surface of SVG dynamic reactive compensation device and at the side of heat dissipation air duct is equipped with handle frame, the inside of handle frame is equipped with blower fan;

[0007] The inside bottom end both sides of the SVG dynamic reactive compensation device are provided with positioning hole, the inside of SVG dynamic reactive compensation device and at the side of blower fan is equipped with Z-shaped shunt plate, the top surface of Z-shaped shunt plate is provided with shunt groove, the inside bottom end of shunt groove and at the top of Z-shaped shunt plate is provided with air hole, the outer surface of Z-shaped shunt plate and close to the side of handle frame is equipped with sealing plate, the bottom end of Z-shaped shunt plate and away from the side of handle frame is equipped with long insertion rod, the bottom end of Z-shaped shunt plate and close to the side of handle frame is equipped with short insertion rod, long insertion rod and short insertion rod can be inserted into the inside of positioning hole.

[0008] Preferably, the inner wall of the SVG dynamic reactive compensation device and below Z-shaped shunt plate is equipped with detection box, the inside of detection box is equipped with singlechip, the outer surface of detection box is equipped with heat dissipation net, the outer surface of detection box and away from the inner wall of SVG dynamic reactive compensation device one side is equipped with side plate, the side of side plate is threadedly connected with bolt.

[0009] Preferably, the bottom end of the cover plate is provided with operation groove, and the bottom end of the cover plate and below the operation groove is equipped with upper block.

[0010] Preferably, the top of the detection box is provided with a diaphragm pressure sensor, the inside of the detection box is equipped with a digital converter, the diaphragm pressure sensor, the digital converter and the singlechip are electrically connected, and the inside of the detection box is equipped with a relay.

[0011] Preferably, the inside top of the operation groove is equipped with a micro air cylinder, the inside of the operation groove is equipped with a sliding plate, and the moving end of the micro air cylinder is installed on the top of the sliding plate.

[0012] Preferably, the bottom end of the sliding plate and the inside of the slot are equipped with a blocking strip, and the bottom end of the upper block is provided with a slot.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The SVG dynamic reactive compensation device of the utility model, the temperature sensor of SVG dynamic reactive compensation device self-contained temperature monitoring to the inside of SVG dynamic reactive compensation device, when the temperature is too high, the opening of the blowing fan is controlled by the singlechip, the Z-shaped shunt plate with shunt groove and air hole is used to shunt the wind, so as to ensure that the heat dissipation wind blowing into the inside of SVG dynamic reactive compensation device is more uniform.

[0015] 2. The SVG dynamic reactive compensation device of the utility model, the diaphragm type pressure sensor detects the air pressure inside the SVG dynamic reactive compensation device, the blowing fan speed reduction mainly realizes the reduction of air pressure by reducing the airflow speed, and the blocking strip reduces the air pressure by increasing the airflow resistance, so as to effectively protect the internal parts of the SVG dynamic reactive compensation device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the SVG dynamic reactive compensation device three-dimensional structure schematic diagram of the utility model;

[0018] Figure 3 It is the detection box structure schematic diagram of the utility model;

[0019] Figure 4 It is the cover plate three-dimensional turnover structure schematic diagram of the utility model.

[0020] In the drawing: 1, SVG dynamic reactive compensation device; 11, Z-shaped shunt plate; 12, long insertion rod; 13, short insertion rod; 14, positioning hole; 15, shunt groove; 16, air hole; 17, sealing plate; 18, detection box; 181, heat dissipation net; 182, diaphragm type pressure sensor; 183, digital converter; 184, singlechip; 185, relay; 186, side plate; 187, bolt; 2, heat dissipation air duct; 3, handle frame; 4, blowing fan; 5, cover plate; 51, operation groove; 52, upper block; 53, slot; 54, sliding plate; 55, blocking strip; 56, micro air cylinder. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with 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 belong to the protection scope of the utility model.

[0022] Embodiment one: please refer to Figures 1-3The utility model provides a kind of SVG dynamic reactive compensation device, including SVG dynamic reactive compensation device 1 and cover plate 5 installed at the top of SVG dynamic reactive compensation device 1, heat dissipation air duct 2 is installed on the outer surface of SVG dynamic reactive compensation device 1, handle frame 3 is installed on the outer surface of SVG dynamic reactive compensation device 1 and at the side of heat dissipation air duct 2, blowing fan 4 is installed in handle frame 3;SVG dynamic reactive compensation device 1 is equipped with intelligent power sensor and measuring instrument inside, sensor can collect key parameters in power grid in real time, intelligent power sensor integrates voltage, current, power factor, frequency and other measurement functions, can monitor power grid state in real time and carry out data transmission, the model of intelligent power sensor adopts EM10S.1G-W, intelligent power sensor supports WIFI and RS485 communication mode, with real-time monitoring, analysis prediction, safety alarm, energy consumption monitoring and remote control and so on Function.

[0023] SVG device can quickly respond to the reactive demand in power grid, complete the compensation operation of reactive power in millisecond level time, which makes SVG become important means to improve the stability and dynamic performance of power grid. At the same time, SVG can also adjust compensation strategy in real time according to the demand of power grid, adapt to the dynamic change of power grid, provide stable reactive support;SVG reactive compensation system has high-precision compensation ability, it can accurately compensate reactive power, so as to improve the power factor of power grid. In the process of power grid operation, the fluctuation of reactive power will lead to the reduction of power factor of power grid, and then affect the stability and efficiency of power grid, SVG reactive compensation system can monitor the reactive power of power grid in real time and compensate quickly, so as to ensure that the power factor of power grid always keeps at a high level;Through accurate compensation of reactive power, SVG can make the power factor of power grid close to or equal to 1, so as to reduce the flow of reactive power in power grid. This not only can reduce line loss, but also can reduce the occupation of reactive power to power grid equipment, improve the utilization rate of power grid equipment. At the same time, SVG reactive compensation system can also reduce the voltage fluctuation and flicker of power grid, improve the power supply quality of power grid, so as to reduce the loss and waste of electric energy.

[0024] The internal bottom end of the SVG dynamic reactive compensation device 1 is provided with positioning holes 14 on both sides, the internal bottom end of the SVG dynamic reactive compensation device 1 is provided with a Z-shaped shunt plate 11 on one side of the blowing fan 4, the top end surface of the Z-shaped shunt plate 11 is provided with a shunt groove 15, the internal bottom end of the shunt groove 15 and the top end of the Z-shaped shunt plate 11 are provided with air holes 16, the outer surface of the Z-shaped shunt plate 11 and close to one side of the handle frame 3 is provided with a sealing plate 17, the bottom end of the Z-shaped shunt plate 11 and away from one side of the handle frame 3 is provided with a long insertion rod 12, the bottom end of the Z-shaped shunt plate 11 and close to one side of the handle frame 3 is provided with a short insertion rod 13, the long insertion rod 12 and the short insertion rod 13 can be inserted into the internal positioning holes 14, the Z-shaped shunt plate 11 and the sealing plate 17 are arranged below and above the blowing fan 4 respectively, and the Z-shaped shunt plate 11, the long insertion rod 12, the short insertion rod 13 and the sealing plate 17 can be detached from the internal SVG dynamic reactive compensation device 1.

[0025] The internal wall of the SVG dynamic reactive compensation device 1 and below the Z-shaped shunt plate 11 is provided with a detection box 18, the internal wall of the detection box 18 is provided with a single-chip microcomputer 184, the outer surface of the detection box 18 is provided with a heat dissipation net 181, the outer surface of the detection box 18 and away from the internal wall of the SVG dynamic reactive compensation device 1 is provided with a side plate 186, one side of the side plate 186 is threadedly connected with a bolt 187, and the side plate 186 is detachable, so that the internal parts of the detection box 18 can be maintained.

[0026] The bottom end of the cover plate 5 is internally provided with an operation groove 51, the bottom end of the cover plate 5 and below the operation groove 51 is provided with an upper block 52, the bottom end of the upper block 52 is in contact with the top end of the SVG dynamic reactive compensation device 1, and the top end of the Z-shaped shunt plate 11 provided with the shunt groove 15 is sealed.

[0027] In the embodiment, the temperature sensor of the SVG dynamic reactive compensation device 1 monitors the temperature of the internal SVG dynamic reactive compensation device 1, when the internal temperature of the SVG dynamic reactive compensation device 1 is consistent with the temperature set by the temperature sensor, the single-chip microcomputer 184 controls the blowing fan 4 to be opened, the external wind is blown into the Z-shaped shunt plate 11 and the sealing plate 17, the shunt groove 15 is opened to shunt the wind, the shunted wind is blown into the internal SVG dynamic reactive compensation device 1 through the air holes 16, the Z-shaped shunt plate 11 provided with the shunt groove 15 and the air holes 16 is used to shunt the wind, so as to ensure that the heat dissipation wind blown into the internal SVG dynamic reactive compensation device 1 is relatively uniform, and the parts running in the internal SVG dynamic reactive compensation device 1 are protected.

[0028] Embodiment two: the embodiment is improved on the basis of embodiment one, and specificly, please refer to Figures 2-4The top end of the detection box 18 is provided with a diaphragm pressure sensor 182, and the inside of the detection box 18 is provided with a digital converter 183. The diaphragm pressure sensor 182 and the digital converter 183 are electrically connected to the single-chip microcomputer 184. The inside of the detection box 18 is provided with a relay 185. The diaphragm pressure sensor 182 is a PXM309-007A10V type, which uses a resistance strain gauge technology. When external pressure acts on the diaphragm of the sensor, the diaphragm deforms slightly. This deformation causes the resistance value of the strain gauge installed on the diaphragm to change. The size of the pressure can be measured through these resistance changes. The single-chip microcomputer 184 is used in cooperation with the analog-to-digital converter 183 to convert the analog signal of the diaphragm pressure sensor 182 into a digital signal for processing.

[0029] The inside top end of the operation groove 51 is provided with a micro air cylinder 56, and the inside of the operation groove 51 is provided with a sliding plate 54. The moving end of the micro air cylinder 56 is installed at the top end of the sliding plate 54. The single-chip microcomputer 184 can adjust the working state of the micro air cylinder 56 by controlling the relay 185.

[0030] The bottom end of the sliding plate 54 and the inside of the slot 53 are provided with a blocking strip 55. The bottom end of the upper block 52 is provided with a slot 53. The bottom end of the blocking strip 55 is inserted into the inside of the shunt groove 15 to increase the air resistance inside the shunt groove 15.

[0031] In this embodiment: the bottom end of the upper block 52 is in contact with the top end of the Z-shaped shunt plate 11. The diaphragm pressure sensor 182 detects the air pressure inside the SVG dynamic reactive compensation device 1. When the air pressure inside the SVG dynamic reactive compensation device 1 is too high, the data detected by the diaphragm pressure sensor 182 is transmitted to the digital converter 183 as an analog signal. The analog signal is converted into a digital signal for processing by the single-chip microcomputer 184. The single-chip microcomputer 184 reduces the speed of the blower fan 4. The single-chip microcomputer 184 controls the micro air cylinder 56 to extend through the relay 185. When the sliding plate 54 moves downward, the blocking strip 55 moves from the inside of the slot 53 to the inside of the shunt groove 15, increasing the resistance of the cooling air inside the shunt groove 15. The reduction of the speed of the blower fan 4 is mainly achieved by reducing the air flow speed to reduce the air pressure. The blocking strip 55 increases the air flow resistance to force the air flow to slow down, thereby causing the air pressure to decrease. The air pressure inside the SVG dynamic reactive compensation device 1 is controlled, which can effectively protect the internal parts of the SVG dynamic reactive compensation device 1. Through real-time air pressure monitoring, it is ensured that the cooling air is always within the appropriate pressure range, thereby optimizing the temperature control and reliability of the SVG dynamic reactive compensation device 1.

[0032] Working principle: the temperature sensor of the SVG dynamic reactive compensation device 1 monitors the inside of the SVG dynamic reactive compensation device 1, when the temperature is too high, the single-chip microcomputer 184 controls the opening of the blowing fan 4, the Z-shaped shunt plate 11 with shunt groove 15 and air hole 16 is used to shunt the wind, so as to ensure that the cooling wind blown into the inside of the SVG dynamic reactive compensation device 1 is more uniform, the diaphragm type pressure sensor 182 detects the air pressure inside the SVG dynamic reactive compensation device 1, when the air pressure inside the SVG dynamic reactive compensation device 1 is too large, the blowing fan 4 reduces the speed to reduce the air pressure, and the blocking strip 55 increases the air resistance to force the airflow to slow down, thereby causing the air pressure to decrease, so as to control the air pressure inside the SVG dynamic reactive compensation device 1, which can effectively protect the internal parts of the SVG dynamic reactive compensation device 1.

[0033] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0034] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An SVG dynamic reactive power compensation device, comprising an SVG dynamic reactive power compensation device (1) and a cover plate (5) installed on the top of the SVG dynamic reactive power compensation device (1), characterized in that: The outer surface of the SVG dynamic reactive power compensation device (1) is equipped with a heat dissipation duct (2), and a handle frame (3) is installed on the outer surface of the SVG dynamic reactive power compensation device (1) and on one side of the heat dissipation duct (2). A blower (4) is installed inside the handle frame (3). The SVG dynamic reactive power compensation device (1) has positioning holes (14) on both sides of its bottom. A Z-shaped diverter plate (11) is installed inside the SVG dynamic reactive power compensation device (1) and on one side of the blower (4). A diverter groove (15) is opened on the top surface of the Z-shaped diverter plate (11). An air hole (16) is opened through the bottom of the diverter groove (15) and the top of the Z-shaped diverter plate (11). A sealing plate (17) is installed on the outer surface of the Z-shaped diverter plate (11) and on the side close to the handle frame (3). A long plug rod (12) is installed at the bottom of the Z-shaped diverter plate (11) and on the side away from the handle frame (3). A short plug rod (13) is installed at the bottom of the Z-shaped diverter plate (11) and on the side close to the handle frame (3). The long plug rod (12) and the short plug rod (13) can be inserted into the positioning hole (14).

2. The SVG dynamic reactive power compensation device according to claim 1, characterized in that: A detection box (18) is installed on the inner wall of the SVG dynamic reactive power compensation device (1) and below the Z-shaped diverter plate (11). A microcontroller (184) is installed inside the detection box (18). A heat dissipation mesh (181) is installed on the outer surface of the detection box (18). A side plate (186) is installed on the outer surface of the detection box (18) and on the side away from the inner wall of the SVG dynamic reactive power compensation device (1). A bolt (187) is threaded on one side of the side plate (186).

3. The SVG dynamic reactive power compensation device according to claim 1, characterized in that: The bottom end of the cover plate (5) is provided with an operating groove (51), and an upper block (52) is installed at the bottom end of the cover plate (5) and below the operating groove (51).

4. The SVG dynamic reactive power compensation device according to claim 2, characterized in that: A diaphragm pressure sensor (182) is installed through the top of the detection box (18). A digital converter (183) is installed inside the detection box (18). The diaphragm pressure sensor (182), the digital converter (183) and the microcontroller (184) are electrically connected. A relay (185) is installed inside the detection box (18).

5. The SVG dynamic reactive power compensation device according to claim 3, characterized in that: A miniature cylinder (56) is installed at the top of the inside of the operating groove (51), and a sliding plate (54) is slidably installed inside the operating groove (51). The moving end of the miniature cylinder (56) is installed at the top of the sliding plate (54).

6. The SVG dynamic reactive power compensation device according to claim 5, characterized in that: A baffle strip (55) is installed at the bottom of the sliding plate (54) and inside the slot (53), and a slot (53) is provided at the bottom of the upper block (52).

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