A heat dissipation system and cooling strategy for series reactor

Abstract

The present application discloses a heat dissipation system and cooling strategy for a series inductor, comprising: a protective envelope, a water cooling subsystem, an air cooling subsystem, and a control subsystem; the protective envelopes are respectively arranged outside the three-phase winding envelope of the series inductor, the cooling water pipe is embedded in the protective envelope and surrounds it multiple times from top to bottom, the water inlet of the top layer of the protective envelope is connected to the water outlet of the water pump, the water outlet of the top layer of the protective envelope is connected to the water inlet of the next layer of the protective envelope, and the water outlet of the bottom layer of the protective envelope is connected to the water inlet of the water pump; the air cooling subsystem is hoisted at the bottom layer of the series inductor; the control subsystem is used to control the operation of the air cooling subsystem and the water cooling subsystem according to the predicted load and real-time ambient temperature of the series inductor; the heat dissipation problem of the series inductor is solved, the ambient temperature of the epoxy resin insulation is reduced, the influence of high temperature on thermal aging of the epoxy resin is alleviated, and the operation reliability of the series inductor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of substation equipment status monitoring, and in particular to a heat dissipation system and cooling strategy for a series reactor. Background Art

[0002] The 35kV shunt capacitor bank is a reactive power compensation device for 500kV substations. The series reactor is connected in series in the shunt capacitor bank to reduce the inrush current and filter out high-order harmonics. The series reactor is arranged outdoors and is frequently switched on and off every day, resulting in poor operation. 1) External environmental factors. Due to wind, sun, temperature difference between day and night, and stress, many cracks will appear in the insulation of the dry-type reactor. In strong winds and rain and snow, water vapor and dust will enter the cracks, causing the field strength at the cracks to be distorted and discharge to occur, which is the starting point of the reactor failure; in rain and snow, some water vapor penetrates into the reactor, causing rust and water stains to appear on the reactor. When the reactor is working, creepage will develop along the rust and water stains, and then burn the reactor; birds approach the reactor for heating and nesting, causing bird droppings to adhere to the reactor; 2) Overvoltage influence. It is easy to cause the insulation inside the reactor to age and crack, resulting in short circuit between turns of the dry-type reactor; 3) Product quality defects. Some reactor products have manufacturing defects such as the use of substandard insulation materials, loose connections and broken wires at welding points between conductors during the design and production process.

[0003] The existing technology for the operation and maintenance of dry-type air-core reactors mainly relies on the infrared temperature measurement method used by manual or patrol robots to preliminarily determine whether the overall temperature of the outer surface of the series reactor is in a normal operating state; however, there is a lack of technical solutions for heat dissipation of the series reactor, which makes the series reactor prone to failure, resulting in the operational reliability of the series reactor not being guaranteed. Summary of the invention

[0004] The present application provides a heat dissipation system and cooling strategy for a series inductor, which is used to solve the technical problem that the prior art lacks a technical solution for dissipating heat from the series inductor, making the series inductor prone to failure and resulting in the operational reliability of the series inductor not being guaranteed.

[0005] In view of this, the first aspect of the present application provides a heat dissipation system for a series reactor, the system comprising: a protective enclosure, a water cooling subsystem, an air cooling subsystem, and a control subsystem;

[0006] Wherein, the water cooling subsystem includes: a water pump and a cooling water pipe;

[0007] The protective envelopes are respectively arranged outside the three-phase winding envelopes of the series reactor, the cooling water pipes are embedded in the protective envelopes and surround multiple circles from top to bottom, the water inlet of the protective envelope on the top layer is connected to the water outlet of the water pump, the water outlet of the protective envelope on the top layer is connected to the water inlet of the protective envelope on the next layer, and the water outlet of the protective envelope on the bottom layer is connected to the water inlet of the water pump;

[0008] The air cooling subsystem is hoisted at the bottom layer of the series reactor;

[0009] The control subsystem is used to control the operation of the air cooling subsystem and the water cooling subsystem according to the predicted load of the series reactor and the real-time ambient temperature.

[0010] Optionally, the water cooling subsystem further includes: a cooling water pool;

[0011] The first end of the cooling water pool is connected to the water outlet of the protective package at the bottom layer, and the second end of the cooling water pool is connected to the water inlet of the water pump; and the water outlet and water inlet of the water pump are both provided with temperature sensing elements for collecting the temperatures of the water outlet and water inlet of the water pump, so as to calculate the water temperature difference;

[0012] When the water temperature difference is greater than a preset temperature threshold, a preset cooling program of the cooling water pool is started.

[0013] Optionally, the protective encapsulation is made of epoxy resin.

[0014] Optionally, the air cooling subsystem includes: fan blades and a motor part; the fan blades are made of high temperature resistant epoxy resin.

[0015] Optionally, it also includes: an electromagnetic shielding shell, which is used to wrap the low-voltage electronic equipment of the heat dissipation system, so as to shield the magnetic field generated by the series inductor.

[0016] Optionally, the electromagnetic shielding shell is made of silicon steel.

[0017] Optionally, the silicon steel material is No. 30 steel.

[0018] A second aspect of the present application provides a control strategy for a heat dissipation system of a series reactor, which is applied to the heat dissipation system of the series reactor described in the first aspect above, and the control strategy includes:

[0019] S1, obtaining a reactive power compensation history curve of a capacitor bank connected in series with the series reactor, and selecting a number of reactive powers from the reactive power compensation history curve as a reference;

[0020] S2. Calculate and predict the reactive power curve of the day based on the reactive power of the plurality of reactive powers, thereby obtaining a real-time curve of the predicted reactive power, and determine the capacitor group corresponding to the real-time curve according to the order in which the reactive compensation capacitors are put into operation;

[0021] S3, according to the real-time curve and the corresponding capacitor group, record the rising time point and the falling time point of the real-time curve, and use the difference between the falling time point and the rising time point as the operation time of the series reactor;

[0022] S4. Control the water cooling subsystem and the air cooling subsystem to operate according to the operating time.

[0023] Optionally, S4, and thereafter, further comprises:

[0024] Get the temperature data value for the predicted day and determine the maximum temperature;

[0025] The water cooling subsystem and the air cooling subsystem are controlled to operate according to the range of the operating time and the maximum temperature.

[0026] Optionally, when the series reactor is put into operation, an electromagnetic induction coil is installed near the water pump;

[0027] Obtaining the induced current of the electromagnetic induction coil and the induced current of the adjacent series reactor of the series reactor;

[0028] When the induced current of the electromagnetic induction coil is much larger than the induced current of the adjacent series inductor, the armature is attracted, the circuits of the water pump motor and the fan motor are both turned on, and the preparatory start-up is completed; when the induced current of the electromagnetic induction coil is approximately equal to the induced current of the adjacent series inductor, the armature is disconnected, the motor circuit is turned off, and the shutdown is completed.

[0029] It can be seen from the above technical solutions that this application has the following advantages:

[0030] The present application provides a heat dissipation system for a series inductor, including a protective envelope, a water-cooling subsystem, an air-cooling subsystem, and a control subsystem; wherein the water-cooling subsystem includes: a water pump and a cooling water pipe; the protective envelopes are respectively arranged outside the three-phase winding envelope of the series inductor, the cooling water pipe is embedded in the protective envelope and surrounds it multiple times from top to bottom, the water inlet of the top layer of the protective envelope is connected to the water outlet of the water pump, the water outlet of the top layer of the protective envelope is connected to the water inlet of the next layer of the protective envelope, and the water outlet of the bottom layer of the protective envelope is connected to the water inlet of the water pump; the air-cooling subsystem is hoisted at the bottom layer of the series inductor; the control subsystem is used to control the operation of the air-cooling subsystem and the water-cooling subsystem according to the predicted load and real-time ambient temperature of the series inductor.

[0031] Compared with the prior art, this application:

[0032] 1) It solves the heat dissipation problem of the series reactor, reduces the ambient temperature of the epoxy resin insulation, slows down the influence of high temperature on the thermal aging of the epoxy resin, and improves the operating reliability of the series reactor;

[0033] 2) Based on the load forecast curve and high temperature weather forecast data, a startup strategy for the heat dissipation device was developed, which is highly automated and practical;

[0034] 3) The heat sink installed on the series reactor has no active devices, which avoids the problems of anti-electromagnetic interference and power supply reliability, and has no impact on the insulation distance of the series reactor, thus greatly enhancing the reliability;

[0035] 4) The outermost protective envelope greatly reduces the impact of external environmental factors on the reactor windings, especially reducing the risk of rainwater penetrating into the internal envelope and causing partial discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 An overall structural diagram of a heat dissipation system of a series reactor provided in an embodiment of the present application;

[0037] Figure 2 The front, cross-section and overall structural schematic diagram of a protective package provided in an embodiment of the present application;

[0038] Figure 3 A schematic flow chart of a control strategy for a heat dissipation system of a series reactor provided in an embodiment of the present application;

[0039] Figure 4 A diagram of predicted reactive power and operation time provided in an embodiment of the present application.

[0040] Labels: 1. Protective enclosure; 2. Insulator base of series inductor; 3. Air cooling subsystem; 4. Control subsystem; 5. Water pump; 6. Cooling water pipe; 7. Encapsulation; 8. Water pipe; A. Phase A winding of series inductor; B. Phase B winding of series inductor; C. Phase C winding of series inductor. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] See also Figure 1, a heat dissipation system for a series reactor provided in an embodiment of the present application comprises: a protective enclosure 1, a water cooling subsystem, an air cooling subsystem 6, and a control subsystem 4;

[0043] The water cooling subsystem includes: a water pump 5, a cooling water pipe 6;

[0044] The protective envelopes 1 are respectively arranged outside the envelopes of the three-phase windings (A, B, C) of the series reactor, the cooling water pipe 6 is embedded in the protective envelope 1 and surrounds it multiple times from top to bottom, the water inlet of the top protective envelope 1 is connected to the water outlet of the water pump 5, the water outlet of the top protective envelope 1 is connected to the water inlet of the next protective envelope 1, and the water outlet of the bottom protective envelope 1 is connected to the water inlet of the water pump 5;

[0045] Please note that Figure 2 The protective encapsulation is the same type of epoxy resin encapsulation as the inner winding encapsulation. The cooling water pipe is made of epoxy resin material and embedded in the protective encapsulation ( Figure 2 7 is an envelope. 8 is a water pipe, and BB is a section of the protective envelope. It is surrounded by multiple circles from top to bottom, and the present invention is 5 circles. The water inlet of the top layer of envelope is connected to the water outlet of the water pump, and the water outlet is connected to the water inlet of the next layer of protective envelope, and the water outlet of the bottom layer of envelope is connected to the water inlet of the water pump. The protective envelope is a consumable and needs to be replaced or re-sprayed with insulating paint regularly.

[0046] The air cooling subsystem 3 is hoisted at the bottom layer of the series reactor;

[0047] It should be noted that the air cooling subsystem of this embodiment includes: fan blades and motor parts; the fan blades are made of high temperature resistant epoxy resin, and the motor part is wrapped in an electromagnetic shielding shell to shield the strong magnetic field of the series reactor and ensure the normal operation of the motor. The entire fan is hoisted at the bottom of the series reactor, and the wind blows from bottom to top. Figure 1 The dotted line in is the ground, and 2 is the insulator base of the series reactor.

[0048] The control subsystem 4 is used to control the operation of the air cooling subsystem and the water cooling subsystem according to the predicted load of the series reactor and the real-time ambient temperature.

[0049] In one embodiment, the water cooling subsystem further includes: a cooling water pool;

[0050] The first end of the cooling water pool is connected to the water outlet of the protective package of the bottom layer, and the second end of the cooling water pool is connected to the water inlet of the water pump; and the water outlet and water inlet of the water pump are both provided with temperature sensing elements for collecting the temperatures of the water outlet and water inlet of the water pump, thereby calculating the water temperature difference; when the water temperature difference is greater than the preset temperature threshold, the preset cooling program of the cooling water pool is started.

[0051] It should be noted that in order to further improve the heat dissipation effect of the series inductor, a cooling water pool is arranged between the water outlet of the bottom protective package and the water inlet of the water pump in this embodiment, and the water outlet and water inlet of the water pump are provided with temperature sensing elements for collecting the temperatures of the water outlet and water inlet of the water pump, so as to calculate the water temperature difference; when the water temperature difference is greater than the preset temperature threshold, the preset cooling program of the cooling water pool is started (such as injecting more cold water into the cooling water pool and discharging part of the hot water at the same time. The technicians in this field can design it according to the actual situation and will not go into details here).

[0052] In one embodiment, the heat dissipation system of the series inductor further includes: an electromagnetic shielding shell, which is used to wrap the low-voltage electronic equipment of the heat dissipation system, so as to shield the magnetic field generated by the series inductor.

[0053] Specifically, the electromagnetic shielding shell is made of silicon steel material, specifically No. 30 steel, which ensures that the shielding effect is above 90% and prevents a large magnetic field from forming a strong eddy current in the equipment and burning the device.

[0054] The following is an explanation of the material selection principle of the electromagnetic shielding shell of this application:

[0055] The voltage and current of the series reactor are mainly concentrated in the low-frequency band, including the 50Hz power frequency component and a small amount of third harmonic components. The high-impedance field dominated by the electric field is very easy to shield, and the shielding effect on the high-impedance field is similar to that of general metals. The shielding efficiency depends on the conductivity of the conductor. The higher the conductivity, the better the shielding effect. For the low-impedance field dominated by the magnetic field, in general, the magnetic field shielding efficiency in the low-frequency band is low. Therefore, the absorption loss of the shielding layer can be increased by using magnetic materials with high magnetic permeability and increasing the thickness of the shielding layer, thereby improving the shielding efficiency. Therefore, 30# steel is used to design the shielding shell with a thickness of 3mm. The relative magnetic permeability of 30# steel is 1000, and the conductivity is 4×10 7 .

[0056] μ r =1000,σ=4×10 7 , L = 3 × 10 -3

[0057] For the absorption loss of 50Hz fundamental component:

[0058]

[0059] For the absorption loss of the third harmonic component at 150Hz:

[0060]

[0061] In order to miniaturize the shielding shell as much as possible, the appearance shape of the shielding shell is designed according to the geometric shape of the fan motor, the circular hole on the front face is the motor shaft, and the circular hole on the rear face is the power interface.

[0062] The above is an embodiment of a heat dissipation system for a series inductor provided in an embodiment of the present application. The following is an embodiment of a control strategy for a heat dissipation system for a series inductor provided in an embodiment of the present application.

[0063] See also Figure 2 , a control strategy for a heat dissipation system of a series reactor provided in an embodiment of the present application includes:

[0064] Step 101, obtaining a reactive power compensation history curve of a capacitor bank connected in series with the series reactor, and selecting a number of reactive powers from the reactive power compensation history curve as a reference;

[0065] Step 102: predict the reactive power curve of the day based on a number of reactive power calculations, thereby obtaining a real-time curve of the predicted reactive power, and determining the capacitor group corresponding to the real-time curve according to the order in which the reactive compensation capacitors are put into use;

[0066] Step 103, according to the real-time curve and the corresponding capacitor group, record the rising time point and the falling time point of the real-time curve, and use the difference between the falling time point and the rising time point as the operation time of the series reactor;

[0067] Step 104: Control the water cooling subsystem and the air cooling subsystem to operate according to the operating time.

[0068] It should be noted that the following is a description of the operating time of the cooling system determined in this application:

[0069] 1) According to the historical curve of the reactive compensation power Q of the reactive compensation equipment (35kV shunt capacitor bank) connected in series with the series reactor in the past 30 days, four reactive powers q that meet the two conditions of the same type of working day and a difference of 10% from the predicted maximum temperature of the day are selected as references to obtain q1, q2, q3, and q4. If it is a non-working day, the historical curve within the past 60 days is selected.

[0070] 2) Calculate the reactive power curve for the day Generate real-time curves for predicting reactive power plan , where n is 4;

[0071] 3) If Figure 4 As shown in the figure, according to the order of inputting reactive power compensation capacitors, the real-time curve q is obtained. plan The corresponding capacitor group is q plan =Q 13 +Q 23 +Q33 +Q 11 +Q 21 +Q 31 +Q 12 +Q 22 +Q 32 , where Q = U 2 wC, the bus voltage is basically constant, U is also constant, and Q can be regarded as a constant value. plan Increase, put the capacitor bank into operation in positive sequence, and record the time point t on , that is, the series reactor starts to operate. plan Reduce, exit the capacitor bank in reverse order, record the time point toff, that is, the series reactor exits operation, the operation time t = t off -t on .

[0072] 4) The control subsystem controls the operation of the water cooling subsystem and the air cooling subsystem according to the operating time obtained in the above steps.

[0073] Furthermore, in one embodiment, it also includes: obtaining the predicted temperature data value of the day to determine the maximum temperature; and controlling the operation of the water cooling subsystem and the air cooling subsystem according to the range of the operating time and the maximum temperature.

[0074] Specific:

[0075] 1) Import the temperature data of the day released by the National Meteorological Bureau to obtain the maximum temperature T max

[0076] 2) If T on the same day max <10℃, water cooling and air cooling will not be started, and the output will be [0,0,0]

[0077] 3) If 20>T on the day max >10℃, only water cooling is started. When the running time t<4h, start the 1st gear water cooling and output [0,0,1]; if the running time is 8h>t>4h, after the running time reaches 4h, start the 2nd gear water cooling and output [0,1,0]; if the running time t>8h, after the running time reaches 4h, start the 3rd gear water cooling and output [0,1,1]

[0078] 4) If 30>T on the same day max >20℃, when the running time t<4h, start the 2nd gear water cooling, and output [0,1,0]; if the running time is 8h>t>4h, after the running time reaches 4h, start the 3rd gear water cooling, and output [0,1,1]; if the running time t>8h, after the running time reaches 8h, start the 1st gear air cooling at the same time, and output [1,0,1]

[0079] 5) If 40>T on the day max>30℃, when the running time t<4h, start the 3rd gear water cooling and output [0,1,1]; if the running time is 8h>t>4h, after the running time reaches 4h, start the 3rd gear water cooling and start the 1st gear air cooling, output [1,0,1]; if the running time t>8h, after the running time reaches 8h, start the 3rd gear water cooling and start the 2nd gear air cooling, output [1,1,0]

[0080] 6) If T on the same day max >40℃, start 3rd gear water cooling and 3rd gear air cooling, output [1,1,1]

[0081] The startup strategy output is encoded using three digits. The third digit is 1, which means air cooling is enabled and water cooling reaches the highest level 3. The last two digits 01 correspond to level 1 air cooling, 10 correspond to level 2 air cooling, and 11 correspond to level 3 air cooling. The third digit is 0, which means air cooling is disabled and only water cooling is enabled. The last two digits 01 correspond to level 1 water cooling, 10 correspond to level 2 water cooling, and 11 correspond to level 3 water cooling.

[0082] Further, when the series reactor is put into operation, an electromagnetic induction coil is installed near the water pump;

[0083] The induced current of the electromagnetic induction coil and the induced current of the adjacent series reactor of the series reactor are obtained; when the induced current of the electromagnetic induction coil is much larger than the induced current of the adjacent series reactor, the armature is attracted, the circuits of the water pump motor and the fan motor are both turned on, and the preparatory start is completed; when the induced current of the electromagnetic induction coil is approximately equal to the induced current of the adjacent series reactor, the armature is disconnected, the motor circuit is turned off, and the shutdown is completed.

[0084] It should be noted that, when the series reactor is put into operation, there is an alternating magnetic field of about 300uT near the fence. Therefore, an electromagnetic induction coil can be installed near the water pump. When the induced current value is I>>I0, the armature is attracted, the water pump motor and fan motor circuits are both turned on, and the control system is also started, completing the preparatory start; similarly, when the induced current value is I≈I0, the armature is disconnected, the motor circuit is turned off, and the shutdown is completed. In the formula, I0 is the induced current generated when this series reactor is not running and the adjacent series reactor is running.

[0085] In addition, after the preparatory start is completed, it is still necessary to control the maximum temperature T max Start the cooling strategy corresponding to the running time t and complete the adjustment of the water cooling gear and the air cooling gear.

[0086] In view of the large magnetic field interference and the inconvenience of data transmission, a dedicated optical fiber is used to transmit the temperature data and operating time from the background monitoring machine to the cooling control system of the series reactor site.

[0087] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0088] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0089] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0090] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0092] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0093] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control strategy for a heat dissipation system of a series reactor, characterized in that: A heat dissipation system applied to a series reactor, the heat dissipation system comprising: a protective package, a water cooling subsystem, an air cooling subsystem, and a control subsystem; Wherein, the water cooling subsystem includes: a water pump and a cooling water pipe; The protective envelopes are respectively arranged outside the three-phase winding envelopes of the series reactor, the cooling water pipes are embedded in the protective envelopes and surround multiple circles from top to bottom, the water inlet of the protective envelope on the top layer is connected to the water outlet of the water pump, the water outlet of the protective envelope on the top layer is connected to the water inlet of the protective envelope on the next layer, and the water outlet of the protective envelope on the bottom layer is connected to the water inlet of the water pump; The air cooling subsystem is hoisted at the bottom layer of the series reactor; The control subsystem is used to control the operation of the air cooling subsystem and the water cooling subsystem according to the predicted load of the series reactor and the real-time ambient temperature; The control strategy includes: S1, obtaining a reactive power compensation history curve of a capacitor bank connected in series with the series reactor, and selecting a number of reactive powers from the reactive power compensation history curve as a reference; S2. Calculate and predict the reactive power curve of the day based on the reactive power of the plurality of reactive powers, thereby obtaining a real-time curve of the predicted reactive power, and determine the capacitor group corresponding to the real-time curve according to the order in which the reactive compensation capacitors are put into operation; S3, according to the real-time curve and the corresponding capacitor group, record the rising time point and the falling time point of the real-time curve, and use the difference between the falling time point and the rising time point as the operation time of the series reactor; S4, controlling the water cooling subsystem and the air cooling subsystem to operate according to the operating time; S5. Obtain the temperature data value of the predicted day and determine the maximum temperature; and control the operation of the water cooling subsystem and the air cooling subsystem according to the range of the operating time and the maximum temperature.

2. The control strategy of the heat dissipation system of the series reactor according to claim 1, characterized in that: The water cooling subsystem further includes: a cooling water pool; The first end of the cooling water pool is connected to the water outlet of the protective package at the bottom layer, and the second end of the cooling water pool is connected to the water inlet of the water pump; and the water outlet and water inlet of the water pump are both provided with temperature sensing elements for collecting the temperatures of the water outlet and water inlet of the water pump, so as to calculate the water temperature difference; When the water temperature difference is greater than a preset temperature threshold, a preset cooling program of the cooling water pool is started.

3. The control strategy of the heat dissipation system of the series reactor according to claim 1, characterized in that: The material of the protective package is epoxy resin.

4. The control strategy of the heat dissipation system of the series reactor according to claim 1, characterized in that: The air cooling subsystem includes: fan blades and a motor part; the fan blades are made of high temperature resistant epoxy resin.

5. The control strategy of the heat dissipation system of the series reactor according to claim 1, characterized in that: Also includes: Electromagnetic shielding shell is used to wrap low-voltage electronic equipment of the heat dissipation system, thereby shielding the magnetic field generated by the series inductor.

6. The control strategy of the heat dissipation system of the series reactor according to claim 5, characterized in that: The electromagnetic shielding shell is made of silicon steel.

7. The control strategy of the heat dissipation system of the series reactor according to claim 6, characterized in that: The silicon steel material is No. 30 steel.

8. The control strategy of the heat dissipation system of the series reactor according to claim 1, characterized in that: When the series reactor is put into operation, an electromagnetic induction coil is installed near the water pump; Obtaining the induced current of the electromagnetic induction coil and the induced current of the adjacent series reactor of the series reactor; When the induced current of the electromagnetic induction coil is greater than the induced current of the adjacent series inductor, the armature is attracted, the circuits of the water pump motor and the fan motor are both turned on, and the preparatory start-up is completed; when the induced current of the electromagnetic induction coil is equal to the induced current of the adjacent series inductor, the armature is disconnected, the motor circuit is turned off, and the shutdown is completed.

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