Static var generator heat dissipation module and abnormality processing method

Abstract

The application discloses a static reactive generator heat dissipation module and an abnormality processing method, and belongs to the technical field of power system heat dissipation. The static reactive generator heat dissipation module comprises a bidirectional cold plate, a basic heat dissipation unit area, an anti-backflow water valve interface and a heat sensor. The bidirectional cold plate comprises an upper layer substrate, a middle layer bidirectional partition plate and a lower layer substrate. The bidirectional cold plate is provided with not less than one basic heat dissipation unit area from both sides to the center. Not less than one basic heat dissipation unit is arranged in each basic heat dissipation unit area. The size and position of the basic heat dissipation unit are arranged according to a certain rule. The basic heat dissipation unit penetrates through the whole bidirectional cold plate. The anti-backflow water valve interface is provided with two pairs of anti-backflow water valve interfaces, which are located on the upper and lower opposite sides of one end of the bidirectional cold plate. The heat sensor is located at the center of the most dense basic heat dissipation unit area in the lower layer substrate. The application can accelerate the heat dissipation of the static reactive generator and effectively monitor the operation state of the static reactive generator.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power system heat dissipation, in particular to a static var generator heat dissipation module and an abnormality processing method. BACKGROUND

[0002] The static var generator (SVG) is a device for improving the power factor of the power system, and is one of the most important components in the power system. The insulated gate bipolar transistor (IGBT) inverter module is the key to the function implementation of the SVG. The SVG detects the load current in real time through an external current transformer, analyzes the reactive content of the load current through an internal digital signal processor, controls the pulse width modulation module to send a control signal to the internal IGBT inverter module according to the set value, so that the IGBT inverter module emits reactive power, and is capacitive; or absorbs reactive power, and is inductive, thereby realizing the bidirectional compensation function of capacitance and inductance.

[0003] The IGBT inverter module generates a large amount of heat when operating at high power density. If the heat cannot be dissipated in time, the performance of the SVG will be affected, and the service life will be shortened. Therefore, the SVG needs good heat dissipation, and generally uses a water cooling system for heat dissipation. The circulation of the cooling liquid in the water cooling system can take away most of the heat, has a high convective heat transfer coefficient, and occupies a small space and has a compact layout, which is beneficial to improving the heat dissipation efficiency of the module. The heat generated by the IGBT inverter module mainly includes junction temperature and case temperature. The increase of the junction temperature and the case temperature will further increase the loss of the IGBT inverter module and intensify the heat generation, forming a vicious cycle. The junction temperature and the case temperature are mainly concentrated in the center of the chip, and the required heat dissipation efficiency is higher. However, the temperature rise of the edge of the chip and the part of the heat dissipation module not in contact with the chip is very small, and a high heat dissipation efficiency is not required.

[0004] The flow performance of the cooling liquid in the traditional water-cooled heat dissipation module is unstable, which can easily cause uneven and insufficient heat dissipation. Moreover, when the working condition of the IGBT inverter module changes sharply, the heat cannot be taken away in time, resulting in local temperature rise failure of the IGBT inverter module. Furthermore, the traditional water-cooled heat dissipation module basically adopts one-way water-cooled heat dissipation, which can easily cause temperature rise accumulation at the water outlet of each heat dissipation module, so that the water-cooled heat dissipation module at the back cannot export the heat, thereby affecting the normal work of the SVG as a whole, and it is difficult to prevent the abnormal working condition of the cooling liquid backflow, which directly affects the reliability and safety of power supply of the power system. SUMMARY

[0005] In order to solve the problems in the prior art, the present application provides a static var generator heat dissipation module and an abnormality processing method.

[0006] The present application adopts the following technical solutions:

[0007] A static var generator heat dissipation module, comprising: a bidirectional cold plate, a basic heat dissipation unit area, an anti-backflow water valve interface and a thermal sensor; the bidirectional cold plate comprises: an upper layer substrate, a middle layer bidirectional partition plate and a lower layer substrate; the upper layer substrate, the middle layer bidirectional partition plate and the lower layer substrate are sequentially stacked and fixed into a whole, the bidirectional cold plate is provided with not less than one basic heat dissipation unit area from both sides to the center, not less than one basic heat dissipation unit is arranged in each basic heat dissipation unit area, the number of the basic heat dissipation units in each basic heat dissipation unit area gradually increases from both sides to the center position, the size of the basic heat dissipation units in each basic heat dissipation unit area gradually decreases from both sides to the center position, each basic heat dissipation unit comprises an inner copper layer, a middle solid-liquid phase change material layer and an outer metal layer, the inner copper layer and the outer metal layer surround an inner space, and the middle solid-liquid phase change material layer is filled in the inner space; the basic heat dissipation unit penetrates through the whole bidirectional cold plate; two pairs of circular interface grooves are opened on the upper and lower opposite sides of one end of the bidirectional cold plate, and the anti-backflow water valve interface is provided with two pairs of anti-backflow water valve interfaces, which are respectively located on the upper and lower opposite sides of one end of the bidirectional cold plate; and the thermal sensor is located at the center of the area with the most dense arrangement of the basic heat dissipation units on the lower surface of the lower layer substrate.

[0008] According to the static var generator heat dissipation module, the anti-backflow water valve interface comprises: an upper layer water inlet water valve interface, an upper layer water outlet water valve interface, a lower layer water outlet water valve interface and a lower layer water inlet water valve interface, and the two pairs of anti-backflow water valve interfaces are sealingly connected with the corresponding circular interface grooves on the upper and lower opposite sides of the bidirectional cold plate in a threaded manner; and the water inlet water valve interface is provided with an anti-backflow device.

[0009] According to the static var generator heat dissipation module, the middle solid-liquid phase change material layer can completely fill the space in the inner copper layer and the outer metal layer when in a liquid state; the outer surface of the outer metal layer is provided with a plurality of water drop-shaped blocks or jujube core-shaped block fins on the upper and lower sides; the inner copper layer of each basic heat dissipation unit extends to the upper surface of the upper layer substrate and the lower surface of the lower layer substrate, and the outer metal layer extends to the lower surface of the upper layer substrate and the upper surface of the lower layer substrate.

[0010] According to the static var generator heat dissipation module, the sizes of the basic heat dissipation units in different basic heat dissipation unit areas are different, and the sizes of the basic heat dissipation units in the same basic heat dissipation unit area are the same; each basic heat dissipation unit is arranged in parallel, there are six basic heat dissipation units around each basic heat dissipation unit, and the adjacent vertices of every three basic heat dissipation units in the same basic heat dissipation unit area are located at three equal division points of the circumference of an outer connecting circle or the vertices of an equilateral triangle, and every two rows of basic heat dissipation units in the same basic heat dissipation unit area are arranged in a staggered manner.

[0011] According to the static var generator heat dissipation module, the basic heat dissipation units in different basic heat dissipation unit regions are staggered at the region boundary positions, and the sum of the side length or radius of the basic heat dissipation unit in the basic heat dissipation unit region far from the central position of the bidirectional cold plate and the radius of the external connecting circle or the side length of the equilateral triangle is an even multiple of the side length or radius of the basic heat dissipation unit in the basic heat dissipation unit region close to the central position of the bidirectional cold plate and the radius of the external connecting circle or the side length of the equilateral triangle.

[0012] According to the static var generator heat dissipation module, the number of basic heat dissipation unit regions and the side length or radius of the basic heat dissipation unit in each basic heat dissipation unit region and the radius of the external connecting circle or the side length of the equilateral triangle should meet the dissipation power of the static var generator.

[0013] According to the static var generator heat dissipation module, four anti-backflow water valve pressure sensing devices are uniformly distributed between the outer metal material layer and the inner hose layer of the water inlet water valve interface, each anti-backflow water valve pressure sensing device comprising an internal spring, a pressure sensor and a water pressure transmission probe; an internal support is fixedly arranged in the water inlet water valve interface, and the water pressure transmission probe is arranged on the internal support; the internal spring and the pressure sensor are arranged in the internal displacement pipe, and the pressure sensor is arranged on the outer side of the internal spring; one end of the water pressure transmission probe close to the outer wall is fixedly connected with the internal spring in the internal displacement pipe through a connecting piece, the pressure sensor is annular and uniformly distributed around the water inlet water valve interface, and the pressure sensor is electrically connected with a wireless module.

[0014] According to the static var generator heat dissipation module, the heat sensor is electrically connected with the wireless module, and 70 DEG C indicating wax sheets, 80 DEG C indicating wax sheets, 90 DEG C indicating wax sheets and 100 DEG C indicating wax sheets are arranged on the heat sensor, which are used for intuitively reflecting the highest temperature of the bidirectional cold plate in the SVG operation process.

[0015] According to the static var generator heat dissipation module, the cooling liquid flows in opposite directions through the two pairs of anti-backflow water valve interfaces on the upper and lower sides of the bidirectional cold plate; the heat dissipation module further comprises an upper cooling system and a lower cooling system, which are separated by a middle part of a middle bidirectional partition plate; the cooling liquid of the upper cooling system flows into the upper water inlet water valve interface, sequentially passes through the upper water inlet of the middle bidirectional partition plate, the water flow channel of the middle bidirectional partition plate and the upper water outlet of the middle bidirectional partition plate, and then flows out from the upper water outlet water valve interface; the cooling liquid of the lower cooling system can flow into the lower water inlet water valve interface, sequentially pass through the lower water inlet of the middle bidirectional partition plate, the water flow channel of the middle bidirectional partition plate and the lower water outlet of the middle bidirectional partition plate, and then flow out from the lower water outlet water valve interface.

[0016] An abnormality processing method of a static var generator heat dissipation module, comprising the following steps:

[0017] Detecting the temperature of the IGBT inverter module of the static var generator when the IGBT inverter module is running through a thermal sensor;

[0018] Judging whether the temperature is greater than a threshold value;

[0019] When the temperature change does not exceed the threshold value, starting to detect the pressure value output by the pressure sensor;

[0020] Judging whether the pressure values of the upper cooling system and the lower cooling system exceed a threshold value;

[0021] If there is a cooling system with a pressure mutation and a change amplitude exceeding the threshold value, comparing the pressure change of the upper cooling system and the pressure change of the lower cooling system with the threshold value;

[0022] If the pressure of the upper cooling system mutates and the change amplitude exceeds the threshold value, and the pressure change of the lower cooling system does not exceed the threshold value, stopping the operation of the upper cooling system to prevent the backflow of the cooling liquid from causing the internal pressure of the heat dissipation module to be too large and damaged; and accelerating the operation of the lower cooling system;

[0023] If the pressure change of the upper cooling system does not exceed the threshold value, and the pressure of the lower cooling system mutates and the change amplitude exceeds the threshold value, accelerating the operation of the upper cooling system; and stopping the operation of the lower cooling system to prevent the backflow of the cooling liquid from causing the internal pressure of the heat dissipation module to be too large and damaged;

[0024] If the pressure of the upper cooling system mutates and the change amplitude exceeds the threshold value, and the pressure of the lower cooling system mutates and the change amplitude exceeds the threshold value, stopping the operation of the upper cooling system and the lower cooling system;

[0025] If the pressure changes of the upper cooling system and the lower cooling system do not exceed the threshold value, normally operating;

[0026] When the temperature mutates and the change amplitude exceeds the threshold value, accelerating the operation of the upper cooling system and the lower cooling system;

[0027] When the judgment result is normal operation or accelerated operation, continuing to repeat the above steps; and when the judgment result is immediate stop, immediately alarming the operation and maintenance personnel.

[0028] Compared with the prior art, the beneficial effects of the present application at least include:

[0029] (1) By setting basic heat dissipation unit areas with different arrangements and sizes, the heat dissipation capacity is concentrated at the contact between the static var generator IGBT inverter module and the bidirectional cold plate, so that the heat dissipation of the static var generator IGBT inverter module is more efficient, the setting of the bidirectional cold plate can make the heat dissipation more uniform, and the backflow prevention valve interface can better prevent the abnormal working condition of the backflow of the cooling liquid.

[0030] (2), by increasing the middle solid-liquid phase change material layer can avoid IGBT inverter module working condition sharp large, heat can not be removed in time, temperature rise sharply.

[0031] (3), by increasing the basic heat dissipation unit outer surface, the two sides of the water drop-shaped or jujube core-shaped fin, can further enhance the heat dissipation effect.

[0032] (4), the thermal sensor located at the center of the most dense area of the lower layer substrate basic heat dissipation unit can monitor the working condition of static var generator in real time.

[0033] (5), the application also discloses a cooling system, the cooling liquid of the upper and lower cooling systems of the bidirectional cold plate can be supplied by different cooling systems, when any one of the cooling systems fails, the other cooling system can still work, compared with the single-phase cold plate, the fault tolerance is higher. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 for prior art, the three-dimensional view of the traditional static var generator heat dissipation module;

[0035] Figure 2 for prior art, the horizontal section view of the traditional static var generator heat dissipation module;

[0036] Figure 3 for the three-dimensional view of the static var generator heat dissipation module proposed in the first embodiment of the application;

[0037] Figure 4 for the horizontal section view of the static var generator heat dissipation module proposed in the first embodiment of the application;

[0038] Figure 5 for the external connection circle view of the same heat dissipation area adjacent basic heat dissipation unit of the static var generator heat dissipation module proposed in the first embodiment of the application;

[0039] Figure 6 for the external connection equilateral triangle view of the same heat dissipation area adjacent basic heat dissipation unit of the static var generator heat dissipation module proposed in the first embodiment of the application;

[0040] Figure 7 for the three-dimensional view of a basic heat dissipation unit structure of the static var generator heat dissipation module proposed in the first embodiment of the application;

[0041] Figure 8 for the structure schematic view of the solid-liquid phase change material layer in the static var generator heat dissipation module proposed in the first embodiment of the application in non-operation (a) and operation (b);

[0042] Figure 9A vertical cross section view of the water valve interface of the water inlet of the static var generator heat dissipation module according to the first embodiment;

[0043] Figure 10 A vertical longitudinal section view of the water valve interface of the water inlet of the static var generator heat dissipation module according to the first embodiment;

[0044] Figure 11 A vertical longitudinal section force diagram of the water valve interface of the water inlet of the static var generator heat dissipation module according to the first embodiment when the water flows in the same direction;

[0045] Figure 12 A vertical longitudinal section force diagram of the water valve interface of the water inlet of the static var generator heat dissipation module according to the first embodiment when the water flows in the opposite direction;

[0046] Figure 13 A top view of the basic heat dissipation unit with an embedded structure in the static var generator heat dissipation module according to the second embodiment;

[0047] Figure 14 A top view of the basic heat dissipation unit with internal fins and an embedded structure in the static var generator heat dissipation module according to the third embodiment;

[0048] Figure 15 A temperature and pressure control logic program block diagram of the static var generator heat dissipation module according to the first embodiment.

[0049] 1, upper layer substrate; 2, middle layer flow plate; 20, water flow channel of middle layer flow plate; 201, water inlet of middle layer flow plate; 202, water outlet of middle layer flow plate; 21, middle layer bidirectional partition plate; 210, water flow channel of middle layer bidirectional partition plate; 211, upper layer water inlet of middle layer bidirectional partition plate; 212, upper layer water outlet of middle layer bidirectional partition plate; 213, lower layer water outlet of middle layer bidirectional partition plate; 214, lower layer water inlet of middle layer bidirectional partition plate; 215, middle part partition plate of middle layer bidirectional partition plate; 3, lower layer substrate; 4, internal copper layer; 5, middle part solid-liquid phase change material layer; 6, external metal layer; 60, basic heat dissipation unit; 600, external connection circle; 6000, equilateral triangle; 61, first area basic heat dissipation unit; 62, second area basic heat dissipation unit; 63, third area basic heat dissipation unit; 601, upper side fin of external metal layer; 602, lower side fin of external metal layer; 7, thermal sensor; 701, 70 DEG C indicating wax sheet; 702, 80 DEG C indicating wax sheet; 703, 90 DEG C indicating wax sheet; 704, 100 DEG C indicating wax sheet; 8, upper layer water inlet water valve interface; 81, upper layer water outlet water valve interface; 82, lower layer water outlet water valve interface; 83, lower layer water inlet water valve interface; 801, external metal material layer; 802, nut; 803, plastic sealing ring; 804, screw thread; 805, internal hose layer; 8021, internal support; 8022, internal displacement pipe; 8023, internal spring; 8024, pressure sensor; 8025, water pressure transmission probe; 901, first basic heat dissipation unit area; 902, second basic heat dissipation unit area; 903, third basic heat dissipation unit area. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. The embodiments described in the present application are only a part of the embodiments of the present application, but not all the embodiments. Based on the spirit of the present application, other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0051] Embodiment 1:

[0052] As shown in the drawings, Figures 2-14 The present application provides a static reactive generator heat dissipation module, which comprises a bidirectional cold plate, a basic heat dissipation unit area, an anti-backflow water valve interface and a thermal sensor 7.

[0053] As shown in the drawings, Figure 3 and Figure 7As shown, the bidirectional cold plate comprises: an upper layer substrate 1, a middle layer bidirectional partition plate 21 and a lower layer substrate 3; the upper layer substrate 1, the middle layer bidirectional partition plate 21 and the lower layer substrate 3 are sequentially stacked and fixed into a whole; the bidirectional cold plate is provided with not less than one basic heat dissipation unit region from both sides to the center, in an embodiment, the bidirectional cold plate is provided with a first basic heat dissipation unit region 901, a second basic heat dissipation unit region 902 and a third basic heat dissipation unit region 903 from both sides to the center, not less than one basic heat dissipation unit 60 is arranged in each basic heat dissipation unit region, the size and position of the basic heat dissipation unit 60 are arranged according to a certain rule, the number of the basic heat dissipation units 60 in each basic heat dissipation unit region gradually increases from both sides to the center position, the size of the basic heat dissipation units 60 in each basic heat dissipation unit region gradually decreases from both sides to the center position, the sizes of the basic heat dissipation units 60 in different basic heat dissipation unit regions are different, the sizes of the basic heat dissipation units 60 in the same basic heat dissipation unit region are the same, each basic heat dissipation unit 60 comprises: an inner copper layer 4, a middle solid-liquid phase change material layer 5 and an outer metal layer 6, the inner copper layer 4 and the outer metal layer 6 enclose an inner space, and the middle solid-liquid phase change material layer 5 is filled in the inner space.

[0054] In the embodiment, the shapes of the outer metal layer 6 and the inner copper layer 4 of the basic heat dissipation unit 60 can be regular hexahedron, cylinder or prism, etc. In the embodiment, the inner copper layer 4 and the outer metal layer 6 are regular hexahedron structures, which are simple to manufacture. The basic heat dissipation unit 60 penetrates through the whole bidirectional cold plate.

[0055] The upper layer substrate 1, the middle layer bidirectional partition plate 21 and the lower layer substrate 3 are a whole, have the characteristics of large heat dissipation coefficient and high mechanical strength, and the material thereof can be silver, aluminum or aluminum alloy, etc., and generally aluminum alloy is adopted.

[0056] Two pairs of circular interface grooves are opened on the upper and lower opposite sides of the bidirectional cold plate, the anti-backflow water valve interface comprises: an upper layer water inlet water valve interface 8, an upper layer water outlet water valve interface 81, a lower layer water outlet water valve interface 82 and a lower layer water inlet water valve interface 83, the upper layer water inlet water valve interface 8, the upper layer water outlet water valve interface 81, the lower layer water outlet water valve interface 82 and the lower layer water inlet water valve interface 83 are respectively connected with the upper layer water inlet 211 of the middle layer bidirectional partition plate, the upper layer water outlet 212 of the middle layer bidirectional partition plate, the lower layer water inlet 214 of the middle layer bidirectional partition plate and the lower layer water outlet 213 of the middle layer bidirectional partition plate through the threads 804, the nuts 802 and the plastic sealing rings 803 in the circular interface grooves, the two pairs of anti-backflow water valve interfaces and the corresponding circular interface grooves on the upper and lower sides of the bidirectional cold plate are sealingly connected in a threaded manner, and the thermal sensor 7 is located at the center of the region where the basic heat dissipation units 60 are most densely arranged on the lower surface of the lower layer substrate 3.

[0057] Specifically, the inner copper layer 4 of each basic heat dissipation unit 60 reaches the upper surface of the upper substrate 1 and the lower surface of the lower substrate 3, and the outer metal layer 6 reaches the lower surface of the upper substrate 1 and the upper surface of the lower substrate 3, so that the IGBT module in operation is in direct contact with the upper surface of the inner copper layer 4 of the basic heat dissipation unit 60, and copper has good heat conduction performance, thereby transferring the heat of the IGBT module to the entire basic heat dissipation unit 60, and then removing the heat through the cooling liquid flowing through the water flow channel 210 of the middle two-way partition plate.

[0058] The water flow channel 210 of the middle two-way partition plate of the static var generator heat dissipation module proposed is more concentrated in the contact position of the heat dissipation module and the SVG inverter module than the water flow channel 20 of the middle flow plate of the traditional static var generator heat dissipation module, so the heat dissipation is more efficient.

[0059] The inner copper layer 4 and the outer metal layer 6 can be connected with the upper substrate 1, the lower substrate 3 and the middle two-way partition plate 21 by resistance welding, laser welding or ultrasonic welding, etc., and generally laser welding is adopted.

[0060] As shown in Figure 7 or Figure 8 , a plurality of upper and lower two-side direction opposite outer metal layer upper side fins 601 and outer metal layer lower side fins 602 located on the outer surface of the outer metal layer 6 of the basic heat dissipation unit 60, the fins can be water drop-shaped or jujube core-shaped blocks, which can further increase the contact area with the cooling liquid, and the thermal sensor 7 is in direct contact with the lower surface of the inner copper layer 4 of the basic heat dissipation unit 60, which is also convenient for the thermal sensor 7 to timely detect the heat generation of the IGBT module in operation. The middle solid-liquid phase change material layer 5 between the outer metal layer 6 and the inner copper layer 4 can change from solid to liquid when the IGBT module generates heat, and can fill the entire space in liquid state. In the process of changing from solid to liquid, a large amount of heat is absorbed, which can avoid the sharp change of the working condition of the IGBT inverter module, and the heat cannot be dissipated in time, and the temperature rises sharply.

[0061] As shown in Figure 5 or Figure 6 , each basic heat dissipation unit 60 is arranged in parallel, and there are six basic heat dissipation units around the basic heat dissipation unit 60 in the same basic heat dissipation unit area, and the closest vertices of every adjacent three basic heat dissipation units 60 are located at three equal points of the circumference of an outer connecting circle 600 with the same radius, or the vertices of an equilateral triangle 6000. Every adjacent two rows of basic heat dissipation units 60 are staggered. The basic heat dissipation units 60 in different basic heat dissipation unit areas are staggered at the area boundary position, and the sum of the side length l of the basic heat dissipation unit 60 in the basic heat dissipation unit area with lower heat dissipation efficiency and the radius r of the outer connecting circle or the side length w of the equilateral triangle is an even multiple of the sum of the side length l of the basic heat dissipation unit 60 in the basic heat dissipation unit area with higher heat dissipation efficiency and the radius r of the outer connecting circle or the side length w of the equilateral triangle, as shown in Figure 4As shown, the side length l1 and the outer connecting circle radius r1 of the first zone basic heat dissipation unit 61 are even times of the side length l2 and the outer connecting circle radius r2 of the second zone basic heat dissipation unit 62; the side length l2 and the outer connecting circle radius r2 of the second zone basic heat dissipation unit 62 are even times of the side length l3 and the outer connecting circle radius r3 of the third zone basic heat dissipation unit 63. In this way, the turbulent flow of the cooling liquid in the bidirectional cold plate can be avoided. At the same time, the basic heat dissipation unit 60 with a smaller side length l can dissipate heat faster.

[0062] The number of the heat dissipation unit regions and the side length or radius of the basic heat dissipation unit 60 in each basic heat dissipation unit region and the radius of the outer connecting circle 600 or the side length of the equilateral triangle 6000 can be determined according to the dissipation power of the static reactive power generator in the field application, that is, the dissipation power of the static reactive power generator in the field application should be met.

[0063] As shown in Figure 4 In industrial manufacturing, the size of l and r can be controlled to very conveniently manufacture the bidirectional cold plate with different heat dissipation efficiency zones.

[0064] As shown in Figures 1-3 The conventional unidirectional cold plate includes an upper substrate 1, a middle flow plate 2 and a lower substrate 3. The temperature of the water outlet 202 of the middle flow plate on one side of the unidirectional cold plate is higher than that of the water inlet 201 of the middle flow plate. The cooling liquid flows in opposite directions through the two pairs of anti-backflow water valve interfaces, and is separated by the middle part of the middle bidirectional partition plate 215, so as to avoid the phenomenon that the temperature of the water outlet 202 of the middle flow plate of the conventional unidirectional cold plate is higher than that of the water inlet 201 of the middle flow plate, resulting in uneven heat dissipation efficiency. The upper and lower sides of the bidirectional cold plate can adopt different cooling liquid circulating systems, which can significantly reduce the failure rate. The anti-backflow device in the upper water inlet water valve interface 8 and the lower water inlet water valve interface 83 can avoid the backflow phenomenon caused by the failure of the cooling liquid circulating system, and further avoid the IGBT module failure phenomenon in the static reactive power generator.

[0065] As shown in Figure 9 and Figure 10As shown, the four anti-backflow water valve pressure sensing devices are evenly distributed between the outer metal layer 801 and the inner hose layer 805 of the water inlet valve interface, each of which includes an internal spring 8023, a pressure sensor 8024, and a water pressure transmission probe 8025; an internal support 8021 is fixedly arranged in the water inlet valve interface, and the water pressure transmission probe 8025 is arranged on the internal support 8021; the internal displacement tube 8022 is internally provided with the internal spring 8023 and the pressure sensor 8024, and the pressure sensor 8024 is arranged outside the internal spring 8023; one end of the water pressure transmission probe 8025 close to the outer wall is fixedly connected with the internal spring 8023 in the internal displacement tube 8022 through a connecting piece, the pressure sensor 8024 is annular and evenly distributed around the water inlet valve interface, and the pressure sensor 8024 is electrically connected with a wireless module.

[0066] As Figure 11 and Figure 12 When the cooling liquid flows normally from the water inlet to the water outlet, the forces F1 and F2 of the water pressure transmission probe 8025 are directed to the same side hose, and the liquid flow channel is normal; when the cooling liquid flows from the water outlet to the water inlet, the forces F3 and F4 of the water pressure transmission probe 8025 are directed to the opposite side hose, the liquid flow channel is almost closed, and the groove formed by the water pressure transmission probe 8025 in the inner hose layer 805 changes the direction of the liquid flow, further preventing the backflow of the cooling liquid. At the same time, the other side of the water pressure transmission probe 8025 compresses the internal spring 8023, so that the internal spring 8023 deforms along the internal displacement tube 8022, transmits the pressure to the pressure sensor 8024, and then transmits the pressure value in real time through the wireless module. When the pressure value exceeds the threshold value, an alarm signal is sent. That is, when the cooling liquid in the anti-backflow water valve interface flows in the opposite direction of the liquid inlet, the pressure value on the pressure sensor 8024 increases significantly, and when the set threshold value is reached, an alarm signal will be transmitted wirelessly.

[0067] At the same time, the thermal sensor 7 located at the center of the most dense area of the basic heat dissipation unit 60 in the lower layer substrate 3 can accurately detect the temperature of the static reactive generator IGBT inverter module during operation, thereby monitoring its operating state at all times and discovering abnormal working conditions in a timely manner; the 70℃ indicating wax sheet 701, the 80℃ indicating wax sheet 702, the 90℃ indicating wax sheet 703, and the 100℃ indicating wax sheet 704 located on the thermal sensor 7 can directly reflect whether the maximum temperature of the bidirectional cold plate during the operation of the SVG exceeds the alarm threshold value 80℃; the thermal sensor 7 is electrically connected with a wireless module, and the thermal sensor 7 can transmit the operating temperature value in real time through the wireless module and accurately record and directly display the maximum temperature during operation. When the maximum temperature during operation exceeds the indicating values of 70℃, 80℃, 90℃, and 100℃ on the indicating wax sheets, the indicating wax sheets with the indicating values will turn black, and the color will not fade when the temperature decreases, which facilitates the operation and maintenance personnel to discover and report the defects in a timely manner.

[0068] When the pressure of the static reactive generator heat dissipation module of the upper cooling system or the lower cooling system exceeds the threshold alarm, the corresponding cooling system immediately stops running to prevent the backflow of the cooling liquid from causing excessive internal pressure of the heat dissipation module and damage; when the temperature of the static reactive generator heat dissipation module exceeds the threshold alarm, the cooling system runs at high speed to increase the heat dissipation efficiency, and only when the temperature drops below the threshold 80℃ can the normal operation be restored.

[0069] The heat dissipation module further comprises: an upper cooling system and a lower cooling system separated by a middle two-way partition plate 215; the cooling liquid of the upper cooling system flows in from the upper water inlet water valve interface 8, sequentially passes through the upper water inlet 211 of the middle two-way partition plate, the water flow channel 210 of the middle two-way partition plate, and the upper water outlet 212 of the middle two-way partition plate, and flows out from the upper water outlet water valve interface 81; the cooling liquid of the lower cooling system can flow in from the lower water inlet water valve interface 83, sequentially pass through the lower water inlet 214 of the middle two-way partition plate, the water flow channel 210 of the middle two-way partition plate, and the lower water outlet 213 of the middle two-way partition plate, and flow out from the lower water outlet water valve interface 82. When any one of the cooling systems fails, the other cooling system can still work, and the fault tolerance rate is higher compared with a single-phase cold plate.

[0070] Embodiment Example Two

[0071] As shown in Figure 13 , the outer metal layer 6 and the inner copper layer 4 can also be an embedded prism structure, and the contact area of the basic heat dissipation unit 60 with the embedded structure with the cooling liquid is larger, which can more effectively dissipate heat, and the difficulty of the preparation process is slightly improved.

[0072] Embodiment Three:

[0073] The outer metal layer 6 is a regular hexahedron structure, and the inner copper layer 4 is a regular hexahedron with fin structure, as shown in Figure 14 (a), has fin and embedded spider web structure, as shown in Figure 14 (b), or embedded vein structure, as shown in Figure 14 (c), the contact area of the inner copper layer 4 of the basic heat dissipation unit 60 with the embedded structure with the middle solid-liquid phase change material layer 5 is larger, which can more effectively dissipate heat, and the difficulty of the preparation process is slightly improved.

[0074] Embodiment Four:

[0075] As shown in Figure 15 , the application also provides an abnormal processing method of a static reactive generator heat dissipation module, comprising the following steps:

[0076] S1, detecting the temperature of the static reactive generator IGBT inverter module during operation by a thermal sensor 7;

[0077] S2, judge whether the temperature is greater than a threshold value;

[0078] S21, when the temperature is lower than or the temperature change does not exceed the threshold value, start detecting the pressure value output by the pressure sensor 8024;

[0079] S211, judge whether the pressure values of the upper cooling system and the lower cooling system exceed the threshold value;

[0080] S2111, if there is a pressure mutation and the change amplitude exceeds the threshold value of the cooling system, compare the upper cooling system pressure change and the lower cooling system pressure change with the threshold value;

[0081] If the upper cooling system pressure mutation and the change amplitude exceed the threshold value and the lower cooling system pressure change does not exceed the threshold value, the upper cooling system stops running to prevent the backflow of the cooling liquid from causing the internal pressure of the heat dissipation module to be too large and damaged; the lower cooling system accelerates running;

[0082] If the upper cooling system pressure change does not exceed the threshold value and the lower cooling system pressure mutation and the change amplitude exceed the threshold value, the upper cooling system accelerates running; the lower cooling system stops running to prevent the backflow of the cooling liquid from causing the internal pressure of the heat dissipation module to be too large and damaged;

[0083] If the upper cooling system pressure mutation and the change amplitude exceed the threshold value and the lower cooling system pressure pressure mutation and the change amplitude exceed the threshold value, the upper cooling system and the lower cooling system both stop running; prevent the backflow of the cooling liquid from causing the internal pressure of the heat dissipation module to be too large and damaged;

[0084] When any one of the cooling systems fails, the other cooling system can still work, and the fault tolerance rate is higher compared with a single-phase cold plate.

[0085] S2112, if the pressure changes of the upper cooling system and the lower cooling system do not exceed the threshold value, normally run;

[0086] S22, when the temperature mutation and the change amplitude exceed the threshold value, the cooling system of the upper cooling system and the lower cooling system accelerates running to increase the heat dissipation efficiency, and only when the temperature drops below the threshold value 80℃, the normal running is restored;

[0087] S3, when the judgment result is normal running or accelerated running, continue to repeat the above steps, when the judgment result is immediate stop running, immediately alarm the maintenance personnel.

[0088] When the pressure value exceeds the threshold value alarm, the cooling system stops running immediately, to prevent the backflow of coolant resulting in excessive pressure inside the heat dissipation module and damage; when the static var generator heat dissipation module temperature exceeds the threshold value alarm, the cooling system runs faster, increasing the heat dissipation efficiency, until the temperature drops below the threshold value of 80℃ to resume normal operation.

[0089] The application greatly improves the heat dissipation efficiency of SVG, avoids the problem of temperature rise accumulation of unidirectional water cooling cooling system, and breaks through the bottleneck of IGBT inverter module heat concentration in SVG, short time working condition becomes large and cannot be cooled in time to fail.

[0090] The upper and lower sides of the bidirectional cold plate can use different cooling liquid circulation systems, which can significantly reduce the failure rate; the anti-backflow device in the upper water inlet valve interface and the lower water inlet valve interface can avoid the backflow phenomenon caused by the failure of the cooling liquid circulation system, thereby avoiding the failure of the IGBT module in the static var generator.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. A static var generator heat sink module, comprising: The bidirectional cold plate, the basic heat dissipation unit area, the anti-backflow water valve interface and the heat sensor (7); characterized in that: The bidirectional cold plate comprises: an upper layer substrate (1), a middle layer bidirectional partition plate (21) and a lower layer substrate (3); the upper layer substrate (1), the middle layer bidirectional partition plate (21) and the lower layer substrate (3) are sequentially stacked and fixed into an integral whole, the bidirectional cold plate is provided with a plurality of basic heat dissipation unit areas from both sides to the center, each basic heat dissipation unit area is provided with not less than one basic heat dissipation unit (60), the number of the basic heat dissipation units (60) in the basic heat dissipation unit areas gradually increases from both sides to the center of the bidirectional cold plate, and the size of the basic heat dissipation units (60) in the basic heat dissipation unit areas gradually decreases from both sides to the center of the bidirectional cold plate; the sizes of the basic heat dissipation units (60) in different basic heat dissipation unit areas are different, and the sizes of the basic heat dissipation units (60) in the same basic heat dissipation unit area are the same; each basic heat dissipation unit (60) comprises an inner copper layer (4), a middle solid-liquid phase change material layer (5) and an outer metal layer (6), the inner copper layer (4) and the outer metal layer (6) enclose an inner space, and the middle solid-liquid phase change material layer (5) is filled in the inner space; the basic heat dissipation unit (60) penetrates through the entire bidirectional cold plate; two pairs of circular interface grooves are formed on the upper and lower opposite sides of one end of the bidirectional cold plate, and two pairs of anti-backflow water valve interfaces are arranged on the upper and lower opposite sides of one end of the bidirectional cold plate; the circular interface grooves and the anti-backflow water valve interfaces are correspondingly arranged; and the heat sensor (7) is arranged at the center of the region where the basic heat dissipation units (60) are most densely arranged on the lower surface of the lower layer substrate (3).

2. The static var generator heat dissipation module according to claim 1, characterized in that: The anti-backflow water valve interface comprises: an upper layer water inlet water valve interface (8), an upper layer water outlet water valve interface (81), a lower layer water outlet water valve interface (82) and a lower layer water inlet water valve interface (83); the anti-backflow water valve interface is sealingly connected with the corresponding circular interface grooves on the upper and lower opposite sides of the bidirectional cold plate through threads; The water inlet water valve interface is provided with an anti-backflow device.

3. The static var generator heat dissipation module according to claim 1, characterized in that: The middle solid-liquid phase change material layer (5) can completely fill the space in the inner copper layer (4) and the outer metal layer (6) when in a liquid state; The outer surface of the outer metal layer (6) is provided with a plurality of water drop-shaped blocks or jujube core-shaped block fins on the upper and lower sides; The inner copper layer (4) of each basic heat dissipation unit (60) extends to the upper surface of the upper layer substrate (1) and the lower surface of the lower layer substrate (3), and the outer metal layer (6) extends to the lower surface of the upper layer substrate (1) and the upper surface of the lower layer substrate (3).

4. The static var generator heat dissipation module according to claim 1 or 3, characterized in that: The basic heat dissipation units (60) are arranged in parallel with each other, six basic heat dissipation units (60) are arranged around each basic heat dissipation unit (60), and adjacent vertices of every three basic heat dissipation units (60) in the same basic heat dissipation unit area are located at three points equally dividing the circumference of an external connecting circle (600) or vertices of an equilateral triangle (6000), and every two adjacent rows of basic heat dissipation units (60) in the same basic heat dissipation unit area are staggered.

5. The static var generator heat dissipation module according to claim 4, wherein: The basic heat dissipation units (60) in different basic heat dissipation unit areas are staggered at the position of the area boundary, and the side length or radius of the basic heat dissipation units (60) in the basic heat dissipation unit area away from the central position of the bidirectional cold plate is an even multiple of the sum of the side length or radius of the basic heat dissipation units (60) in the basic heat dissipation unit area close to the central position of the bidirectional cold plate and the radius of the external connecting circle (600) or the side length of the equilateral triangle (6000).

6. The static var generator heat dissipation module according to claim 5, wherein: The number of basic heat dissipation unit areas and the side length or radius of the basic heat dissipation units (60) in each basic heat dissipation unit area and the radius of the external connecting circle (600) or the side length of the equilateral triangle (6000) are determined according to the dissipation power of the static var generator.

7. The static var generator heat dissipation module according to claim 2, wherein: The external metal material layer (801) and the internal hose layer (805) of the water inlet valve interface are uniformly distributed with four anti-backflow valve pressure sensing devices, each of which includes an internal spring (8023), a pressure sensor (8024) and a water pressure transmission probe (8025); an internal support (8021) is fixedly arranged in the water inlet valve interface, and the water pressure transmission probe (8025) is arranged on the internal support (8021); the internal displacement tube (8022) is internally provided with the internal spring (8023) and the pressure sensor (8024), and the pressure sensor (8024) is arranged on the outside of the internal spring (8023); one end of the water pressure transmission probe (8025) close to the outer wall is fixedly connected with the internal spring (8023) in the internal displacement tube (8022) through a connecting piece, the pressure sensor (8024) is annular and uniformly distributed around the water inlet valve interface, and the pressure sensor (8024) is electrically connected with a wireless module.

8. The static var generator heat dissipation module according to claim 1, wherein: The heat sensor (7) is electrically connected with a wireless module, and the heat sensor (7) is provided with a 70℃ indicating wax sheet (701), an 80℃ indicating wax sheet (702), a 90℃ indicating wax sheet (703) and a 100℃ indicating wax sheet (704) for intuitively reflecting the highest temperature of the bidirectional cold plate during the operation of the static var generator.

9. The static var generator heat dissipation module according to claim 7, characterized in that: The cooling liquid flows in opposite directions through the two pairs of anti-backflow water valve interfaces on the upper and lower sides of the bidirectional cold plate. The heat dissipation module further comprises an upper cooling system and a lower cooling system separated by a middle bidirectional partition (215). The cooling liquid of the upper cooling system flows in from the upper inlet water valve interface (8), sequentially passes through the upper inlet of the middle bidirectional partition (211), the water flow channel of the middle bidirectional partition (210), and the upper outlet of the middle bidirectional partition (212), and flows out from the upper outlet water valve interface (81). The cooling liquid of the lower cooling system flows in from the lower inlet water valve interface (83), sequentially passes through the lower inlet of the middle bidirectional partition (214), the water flow channel of the middle bidirectional partition (210), and the lower outlet of the middle bidirectional partition (213), and flows out from the lower outlet water valve interface (82).

10. An abnormality processing method for a static var generator heat dissipation module, characterized in that: The static var generator heat dissipation module is the one according to claim 9, and the abnormality processing method comprises the following steps: Detecting the temperature of the static var generator IGBT inverter module in operation through a thermal sensor (7); Judging whether the temperature is greater than a threshold value; When the temperature change does not exceed the threshold value, detecting the pressure value output by a pressure sensor (8024); Judging whether the pressure values of the upper and lower cooling systems exceed the threshold value; If there is a pressure mutation in the cooling system and the change amplitude exceeds the threshold value, comparing the upper cooling system pressure change and the lower cooling system pressure change with the threshold value; If the upper cooling system pressure mutates and the change amplitude exceeds the threshold value, and the lower cooling system pressure change does not exceed the threshold value, stopping the operation of the upper cooling system to prevent backflow of the cooling liquid from causing excessive internal pressure in the heat dissipation module and damage; and accelerating the operation of the lower cooling system; If the upper cooling system pressure change does not exceed the threshold value, and the lower cooling system pressure mutates and the change amplitude exceeds the threshold value, accelerating the operation of the upper cooling system; and stopping the operation of the lower cooling system to prevent backflow of the cooling liquid from causing excessive internal pressure in the heat dissipation module and damage; If the upper cooling system pressure mutates and the change amplitude exceeds the threshold value, and the lower cooling system pressure mutates and the change amplitude exceeds the threshold value, stopping the operation of both the upper and lower cooling systems; If the pressure changes of the upper and lower cooling systems do not exceed the threshold value, normally operating; When the temperature mutates and the change amplitude exceeds the threshold value, accelerating the operation of both the upper and lower cooling systems; When the judgment result is normal operation or accelerated operation, continue to repeat the above steps; and when the judgment result is immediate stop, immediately alarm the maintenance personnel.

Images