Water cooling control system of SVG reactive power compensation device

Abstract

The utility model relates to the technical field of reactive power compensation, in particular to a water-cooling control system of an SVG reactive power compensation device, which comprises a reactive power compensation device body, and the reactive power compensation device body comprises an IGBT power module, an SVG inlet valve body and an SVG outlet valve body. The cooling device further comprises an inner circulation cooling assembly and an outer circulation cooling assembly. The internal circulation cooling assembly comprises a water cooling plate and an internal circulation pipe, the water cooling plate is attached to the IGBT power module, the SVG inlet valve body is connected with one end of the water cooling plate through the internal circulation pipe, and the other end of the water cooling plate is connected with the SVG outlet valve body through the internal circulation pipe; the outer circulation cooling assembly comprises a PLC, a detection sensor, a circulating water pump, a water-air heat exchanger, a gas-water separator, a buffer water tank and an outer circulation loop pipe. The water cooling plate directly exchanges heat with the IGBT power module, so that heat generated during operation of the IGBT power module can be effectively absorbed, and efficient heat dissipation of the SVG reactive power compensation device is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of reactive power compensation, in particular to a water cooling control system of an SVG reactive power compensation device. Background Art

[0002] SVG (Static VAR Generator) reactive power compensation devices, short for static VAR generators, utilize self-commutated power semiconductor bridge converters to rapidly regulate reactive power. SVG reactive power compensation devices fulfill crucial roles in power grid systems, including maintaining a high power factor, reducing power losses, and improving power efficiency. During operation, SVG reactive power compensation devices generate heat due to power loss, particularly in their core components, the IGBT power modules. Increased IGBT power consumption and heat flux can easily lead to overheating and failure of the SVG, directly impacting the quality and stability of power grid supply and potentially causing further grid failure. Therefore, heat dissipation in SVG reactive power compensation devices is essential. Utility Model Content

[0003] To address the above-mentioned problems, the present invention provides a water-cooling control system for an SVG reactive power compensation device, comprising a reactive power compensation device body, the reactive power compensation device body including an IGBT power module, an SVG inlet valve body, and an SVG outlet valve body. The system also includes an internal circulation cooling assembly disposed within the reactive power compensation device body, and an external circulation cooling assembly disposed outside the reactive power compensation device body.

[0004] The internal circulation cooling assembly includes a water-cooling plate and an internal circulation pipe. The water-cooling plate is bonded to the IGBT power module. The SVG inlet valve body is connected to one end of the water-cooling plate through the internal circulation pipe, and the other end of the water-cooling plate is connected to the SVG outlet valve body through the internal circulation pipe.

[0005] The external circulation cooling component includes a PLC controller, a detection sensor, a circulating water pump, a water-to-air heat exchanger, an air-water separator, a buffer water tank and an external circulation loop pipe; the PLC controller is electrically connected to the detection sensor, the circulating water pump and the water-to-air heat exchanger respectively; the SVG outlet valve body is connected to the external circulation loop pipe via the air-water separator, the external circulation loop pipe is connected to the circulating water pump, the circulating water pump is connected to the input end of the water-to-air heat exchanger via the external circulation loop pipe, the output end of the water-to-air heat exchanger is connected to the buffer water tank, the buffer water tank is connected to the SVG inlet valve body via the external circulation loop pipe, and the buffer water tank stores cooling water.

[0006] The cooling water is high-purity water containing ethylene glycol antifreeze.

[0007] In order to realize status monitoring of the water cooling control system, the detection sensors include temperature and humidity detection sensors and flow detection sensors.

[0008] In order to prevent rigid particles falling off during the circulation process from causing pipeline blockage, the external circulation cooling component is also provided with a machine filter, which is installed at the front end of the SVG inlet valve body.

[0009] In a specific embodiment, the machine filter is further equipped with a pressure sensor, which is electrically connected to the PLC controller and can determine the dirt condition based on the detection pressure difference signal of the pressure sensor.

[0010] The water cooling control system further includes a water supply tank and a water supply pump. The water supply pump is electrically connected to the PLC controller, and the water supply tank is connected to the buffer water tank through the water supply pump.

[0011] In order to maintain low conductivity of the cooling water, the water cooling control system further includes a deionization circuit, which is connected in parallel to the external circulation circuit pipe. The deionization circuit includes an ion exchanger and a conductivity sensor, and the conductivity sensor is electrically connected to the PLC controller.

[0012] In a specific embodiment, the ion exchanger uses ion exchange resin.

[0013] The water cooling control system adopts an independent AC power supply and also includes a power supply, which is electrically connected to the PLC controller, the water-to-air heat exchanger and the circulating water pump to provide driving power for each device.

[0014] To achieve remote monitoring, the PLC controller is wirelessly connected to a remote terminal, which is a mobile terminal or a monitoring host.

[0015] Beneficial effects: The utility model is a water-cooling control system for an SVG reactive power compensation device. It directly exchanges heat with the IGBT power module through a water-cooling plate, effectively absorbing the heat generated during its operation, and realizing efficient heat dissipation of the SVG reactive power compensation device. At the same time, it detects the temperature and flow of the system cooling water circulation in real time, and adjusts the speed of the water-to-air heat exchanger in time through the PLC controller to adapt to different cooling requirements, thereby realizing precise control and optimizing the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural diagram of the water cooling control system of the SVG reactive power compensation device. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0018] See also Figure 1 This embodiment provides a water-cooling control system for an SVG reactive power compensation device, including a reactive power compensation device body, wherein the reactive power compensation device body includes an IGBT power module, an SVG inlet valve body, and an SVG outlet valve body.

[0019] To dissipate heat from the IGBT power modules in the reactive power compensation device, the water-cooling control system also includes an internal cooling assembly within the device and an external cooling assembly outside the device. The internal cooling assembly includes a water-cooling plate and an internal circulation pipe. The water-cooling plate is attached to the IGBT power module and absorbs heat generated during operation for heat exchange. The SVG inlet valve body is connected to one end of the water-cooling plate via the internal circulation pipe, while the other end of the water-cooling plate is connected to the SVG outlet valve body via the internal circulation pipe. The external circulation cooling component includes a PLC controller, a detection sensor, a circulating water pump, a water-to-air heat exchanger, an air-water separator, a buffer water tank and an external circulation loop pipe. The buffer water tank stores cooling water, which is high-purity water containing ethylene glycol antifreeze; the PLC controller is electrically connected to the detection sensor, the circulating water pump and the water-to-air heat exchanger, respectively, and is used to receive the detection signal of the detection sensor to determine the system status, and trigger and control the circulating water pump and the water-to-air heat exchanger respectively; the SVG outlet valve body is connected to the external circulation loop pipe via the air-water separator, and the air-water separator can collect gas in the external circulation loop pipe and discharge the gas; the external circulation loop pipe is connected to the circulating water pump, and the circulating water pump is connected to the input end of the water-to-air heat exchanger through the external circulation loop pipe. The output end of the water-to-air heat exchanger is connected to the buffer water tank, and the buffer water tank is connected to the SVG inlet valve body through the external circulation loop pipe. The circulating water circuit of the water cooling control system is a one-way water circuit. The circulating water pump operates continuously to provide water circulation power, extracting cooling water from the reactive power compensation device body. The cooling water is circulated and cooled through the SVG outlet valve body, air-water separator, circulating water pump, water-air heat exchanger, buffer water tank, SVG inlet valve body, and water cooling plate.

[0020] During the cooling cycle, the external cooling assembly is equipped with a machine filter, installed at the front end of the SVG inlet valve body to prevent any rigid particles from entering the SVG inlet valve body during the cooling cycle. A pressure sensor is also installed within the machine filter, electrically connected to the PLC controller. This sensor monitors the pressure differential across the machine filter in real time. Excessive pressure differentials indicate contamination, triggering an alarm signal through the PLC controller to prompt cleaning of the machine filter to ensure effective cooling. The PLC controller is wirelessly connected to a remote terminal, either a mobile device or a monitoring host. This terminal receives real-time signal data uploaded by the PLC controller, enabling remote monitoring of the water-cooling control system.

[0021] To ensure independent operation of the water-cooling control system without interference from the electrical signals of the SVG reactive power compensation device, the water-cooling control system also includes a power supply. The power supply uses an independent 380V AC power supply and is independently configured from the power supply of the SVG reactive power compensation device. The power supply is electrically connected to the PLC controller, water-to-air heat exchanger, and circulating water pump to provide driving power for each device.

[0022] In order to realize the status monitoring of the water-cooling control system, the detection sensor includes a temperature and humidity detection sensor and a flow detection sensor. The detection sensor is installed on the external circulation loop pipe. The temperature and humidity detection sensor can detect the temperature value of the cooling water inside the reactive compensation device body extracted by the circulating water pump in real time, and transmit the temperature detection signal to the PLC controller. The PLC controller can adjust the speed of the water-to-air heat exchanger according to the temperature detection signal to realize the graded heat dissipation control of the water-to-air heat exchanger. When it is detected that the cooling water temperature is too high, the PLC controller will increase the air volume of the water-to-air heat exchanger to improve the cooling efficiency; conversely, when the cooling water temperature is too low, the air volume is reduced to avoid overcooling. The flow detection sensor is used to detect the cooling water flow in the external circulation loop pipe and transmit the flow detection signal to the PLC controller.

[0023] To ensure sufficient cooling water flow in the internal and external circulation pipes of the water-cooled control system, the water-cooled control system is also equipped with a make-up water tank and a make-up water pump. The make-up water pump is electrically connected to the PLC controller, and the make-up water tank is connected to the buffer water tank through the make-up water pump. When the flow detection sensor transmits the cooling water flow detection signal in the external circulation loop pipe to the PLC controller, the PLC controller processes the detection signal and determines that the cooling water flow rate is lower than a set threshold. The PLC controller controls the start-up water pump to transfer the cooling water stored in the make-up water tank to the buffer water tank through the make-up water pump, maintaining a constant cooling water flow in the water-cooled control system and maintaining the water cooling efficiency of the IGBT power module.

[0024] In addition, in order to achieve the goal of maintaining low conductivity when the water-cooling control system dissipates heat for the reactive compensation device body, the water-cooling control system also includes a deionization circuit, which is connected in parallel to the external circulation circuit pipe. The deionization circuit includes an ion exchanger and a conductivity sensor. The conductivity sensor is electrically connected to the PLC controller, and the conductivity sensor can detect the ion concentration of the cooling water flowing into the deionization circuit; the ion exchanger uses ion exchange resin to remove and purify ions in the cooling water to prevent the electrical components of the reactive compensation device body from being damaged due to excessive conductivity of the cooling water.

Claims

1. A water cooling control system for an SVG reactive power compensation device, comprising a reactive power compensation device body, characterized in that: The reactive power compensation device body includes an IGBT power module, an SVG inlet valve body, and an SVG outlet valve body; the water cooling control system also includes an internal circulation cooling component arranged inside the reactive power compensation device body, and an external circulation cooling component arranged outside the reactive power compensation device body; The internal circulation cooling assembly includes a water-cooling plate and an internal circulation pipe. The water-cooling plate is bonded to the IGBT power module. The SVG inlet valve body is connected to one end of the water-cooling plate through the internal circulation pipe, and the other end of the water-cooling plate is connected to the SVG outlet valve body through the internal circulation pipe. The external circulation cooling component includes a PLC controller, a detection sensor, a circulating water pump, a water-to-air heat exchanger, an air-water separator, a buffer water tank and an external circulation loop pipe. The PLC controller is electrically connected to the detection sensor, the circulating water pump and the water-to-air heat exchanger respectively; the SVG outlet valve body is connected to the external circulation loop pipe via the air-water separator, the external circulation loop pipe is connected to the circulating water pump, the circulating water pump is connected to the input end of the water-to-air heat exchanger via the external circulation loop pipe, the output end of the water-to-air heat exchanger is connected to the buffer water tank, the buffer water tank is connected to the SVG inlet valve body via the external circulation loop pipe, and the buffer water tank stores cooling water.

2. The water cooling control system according to claim 1, characterized in that: The detection sensors include a temperature and humidity detection sensor and a flow detection sensor.

3. The water cooling control system according to claim 1, characterized in that: The external circulation cooling assembly is further provided with a machine filter, and the machine filter is installed at the front end of the SVG inlet valve body.

4. The water cooling control system according to claim 3, characterized in that: The machine filter is also equipped with a pressure sensor, which is electrically connected to the PLC controller.

5. The water cooling control system according to claim 1, characterized in that: It also includes a water supply tank and a water supply pump. The water supply pump is electrically connected to the PLC controller, and the water supply tank is connected to the buffer water tank through the water supply pump.

6. The water cooling control system according to claim 1, characterized in that: It also includes a deionization circuit, which is connected in parallel to the external circulation circuit pipe. The deionization circuit includes an ion exchanger and a conductivity sensor, and the conductivity sensor is electrically connected to the PLC controller.

7. The water cooling control system according to claim 6, characterized in that: The ion exchanger uses ion exchange resin.

8. The water cooling control system according to claim 1, characterized in that: The cooling water is high-purity water containing ethylene glycol antifreeze.

9. The water cooling control system according to claim 1, characterized in that: It also includes a power supply, which is electrically connected to the PLC controller, the water-air heat exchanger and the circulating water pump.

10. The water cooling control system according to claim 1, characterized in that: The PLC controller is wirelessly connected to a remote terminal, which is a mobile terminal or a monitoring host.

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