Voltage and reactive power integrated control system

Abstract

The application discloses a voltage and reactive power comprehensive control system, and relates to the technical field of power transmission and transformation. The voltage and reactive power comprehensive control system comprises winding units and tap switching devices, the winding units comprise main windings and adaptive tap windings, the tap windings are formed with a plurality of joints one, and further comprises: transition protectors, two transition protectors are arranged for each winding unit; a tap switching wheel is electrically connected to a neutral line; a driving unit one is arranged in an on-load voltage regulating transformer and is used for driving the tap switching wheel to rotate; a tap unit has at least two groups and comprises a moving joint used for contacting the joints one, the other end of the moving joint is electrically connected with a joint two, the joint two is used for contacting the tap switching wheel; a driving unit two is arranged in the on-load voltage regulating transformer and is used for driving the tap unit to switch among the plurality of joints one; and a controller is electrically connected to the driving unit one and the driving unit two. The application has the effects of improving the structural service life, stability and safety of the on-load voltage regulating transformer.

Description

Technical Field

[0001] This application relates to the field of power transmission and transformation technology, and in particular to a voltage and reactive power integrated control system. Background Technology

[0002] Reactive power refers to the energy exchange between the power source and reactive components in an AC circuit due to the presence of devices such as inductors and capacitors. It can be simply understood as the energy required to maintain the power supply system.

[0003] In power transmission and distribution networks, changes in load will also alter the electrical parameters of the grid. To ensure the normal operation of the load equipment, these parameters need to be adjusted promptly. Since reactive power has a significant impact on voltage, reactive power voltage regulation methods are frequently employed.

[0004] In reactive power voltage regulation, an on-load tap changer is currently used. The on-load tap changer adjusts the output voltage by switching the taps (partially with polarity taps), that is, by changing the number of turns in the transformer windings. However, in an on-load tap changer:

[0005] On the one hand, the mechanical action of the tap causes structural wear; on the other hand, it is known that closing the switch easily generates an electric arc, which will accelerate the damage of the tap. In other words, the lifespan of the tap becomes a major concern.

[0006] Shanghai University of Electric Power's patent publication number CN119561071A discloses a flywheel energy storage arc-free switching contact adjustment device and method for an on-load tap-changing transformer. It eliminates the conditions for arc generation by ensuring the voltage across the switching switch is below a certain threshold or even zero before the contacts close. However:

[0007] In practice, a series of electronic components are added to the tap changer circuit, which needs to be used in conjunction with a converter. The converter includes a controllable rectifier, an inverter, and a DC capacitor. The controllable rectifier is composed of six fully controllable power switching devices. In high-voltage areas, there are relatively many electronic components involved, which are relatively easy to cause failures and safety risks. Therefore, this application proposes a new technical solution. Summary of the Invention

[0008] To improve the structural service life, operational stability, and safety of on-load tap-changing transformers, this application provides a voltage and reactive power integrated control system.

[0009] This application provides a voltage and reactive power integrated control system, which adopts the following technical solution:

[0010] A voltage-reactive power integrated control system includes a winding unit and a tap switching device. The winding unit includes a main winding and an adapted tap winding, the tap winding forming multiple terminals. The system also includes:

[0011] Transition protectors, two of which are provided for each winding unit;

[0012] The tap changer is electrically connected to the neutral line.

[0013] Drive unit one is installed on the on-load tap changer and is used to drive the tap changer wheel to rotate;

[0014] The tap unit has at least two sets and includes a movable connector for contacting a first connector, with the other end electrically connected to a second connector for contacting a tap switching wheel.

[0015] Drive unit two is located on the on-load tap-changing transformer and is used to drive the tap-changing unit to switch between multiple terminals one;

[0016] The controller is electrically connected to drive unit one and drive unit two.

[0017] The transition protector is connected in parallel to connector two, and one end is electrically connected to connector three for contacting the tap switching wheel. The tap switching wheel includes an insulated wheel body and a conductive sector block. The sector block is embedded in the wheel body and is used to contact connector two and connector three. Connectors two and connector three contact the sector block from the side of the tap switching wheel.

[0018] The two joints are symmetrically distributed on both sides of the central axis of the wheel body, and the two joints are located between the two joints and are symmetrically distributed on both sides of the central axis of the wheel body.

[0019] Optionally, the wheel body has a sliding groove, the sector block is slidably connected to the sliding groove and the sliding direction is parallel to the central axis of the tap-changing wheel, the center of the tap-changing wheel is fixed with a central shaft, the central shaft is provided with an oil passage, one end of the oil passage is used to connect to the sliding groove, and the other end extends outward to the on-load tap-changing transformer and is provided with an oil inlet and outlet; an oil supply ring is sleeved on the central shaft, the oil supply ring is a hollow structure and connects to the oil inlet and outlet, and the oil supply ring is connected to an oil quantity control unit.

[0020] Optionally, the controller is also electrically connected to an oil pressure detection unit, the detection end of which is inserted into an oil supply ring.

[0021] Optionally, a hydraulic structure is provided in the slide groove, an insulating and heat-insulating block is fixed to the telescopic rod end of the hydraulic structure, a fan-shaped block is fixed to the insulating and heat-insulating block, and the cylinder of the hydraulic structure is connected to the oil passage.

[0022] Optionally, an insulated integrated wheel is fitted on the central shaft, and four hydraulic structures are provided on the integrated wheel. Each hydraulic structure is connected to an oil pump, and an insulating heat-insulating block is fixed to the telescopic rod end of the hydraulic structure. Each insulating heat-insulating block is respectively fixed to a connector and a connector.

[0023] Optionally, it also includes an oil pressure detection unit two for detecting the hydraulic pressure in the cylinder of the hydraulic structure two, wherein the oil pressure detection unit two, the oil pressure detection unit one, the oil quantity control unit and the oil pump are electrically connected to the controller respectively;

[0024] The controller is configured as follows:

[0025] Define two connectors as A1 and A2, and two connectors as B1 and B2, and arrange them in the circumferential direction of the tap-switching wheel in the order of A1, B1, B2, A2;

[0026] Obtain the rotation parameters of the tap changer wheel;

[0027] If the current rotation parameters match the position of A1, then determine whether the detection value of the first oil pressure detection unit meets the standard. If not, control the oil quantity control unit to supply oil to the first hydraulic structure.

[0028] If the current rotation parameters match the position of B1, then determine whether the detection value of the corresponding oil pressure detection unit two meets the standard. If not, control the oil pump to supply oil to the corresponding hydraulic structure two.

[0029] If the current rotation parameters match the position of B2, then determine whether the detection value of the corresponding oil pressure detection unit two meets the standard. If not, control the oil pump to supply oil to the corresponding hydraulic structure two.

[0030] If the current rotation parameters match the position of A2, then determine whether the detection value of the corresponding oil pressure detection unit two meets the standard. If not, control the oil pump to supply oil to the corresponding hydraulic structure two.

[0031] If the current rotation parameters meet the conditions for completing the tap change, then the control oil pump resets the hydraulic structure two corresponding to the joints two and three that are not in contact with the sector block.

[0032] Optionally, the transition protector includes a protection resistor.

[0033] Optionally, the central shaft is fitted with a conductive ring, which is connected to the sector block, and a conductive plate is connected to the outside of the conductive ring, which is electrically connected to the neutral line.

[0034] Optionally, the second drive unit includes a protective rod and a linear actuator. The protective rod is vertically slidably connected to the transformer structure, with one end connected to the movable joint and the other end extending outward from the transformer.

[0035] In summary, this application offers the following beneficial technical effects: Because the switching mechanism in this application is no longer a thin contact point but a larger sector block, it is less prone to damage due to mechanical wear. Simultaneously, since the high-voltage area primarily consists of mechanical structures, meaning there are fewer electronic components, the failure rate is relatively low, and safety is relatively higher. Furthermore, because both terminals are always energized during the switching process, the voltage difference between the sector block (acting as the moving contact) and the voltage source is smaller during switching; that is, the probability and energy of arcing during switching are lower, thereby improving the structural service life, operational stability, and safety of the on-load tap-changing transformer. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the circuit structure of this application;

[0037] Figure 2 This is a schematic diagram of the tap changer in this application;

[0038] Figure 3 This is a schematic diagram of the wheel structure in this application;

[0039] Figure 4 This is a structural schematic diagram of the chute and hydraulic structure one in this application;

[0040] Figure 5 This is a schematic diagram of the integrated wheel structure in this application;

[0041] Figure 6 This is a schematic diagram of the controller connection in this application.

[0042] Explanation of reference numerals in the attached diagram: 1. Winding unit; 11. Main winding; 12. Tap winding; 121. Connector 1; 2. Transition protector; 21. Connector 3; 3. Tap switching wheel; 31. Wheel body; 32. Sector block; 33. Central shaft; 331. Oil supply ring; 332. Integrated wheel; 333. Hydraulic structure 2; 334. Conductive ring; 335. Conductive plate; 34. Hydraulic structure 1; 35. Slide groove; 4. Drive unit 1; 5. Tap unit; 51. Moving connector; 52. Connector 2; 6. Drive unit 2; 61. Protective rod; 62. Linear actuator; 7. Controller; 81. Oil pressure detection unit 1; 82. Oil pressure detection unit 2; 83. Oil quantity control unit; 84. Oil pump. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0044] This application discloses a voltage and reactive power integrated control system.

[0045] Reference Figure 1The voltage and reactive power integrated control system includes a winding unit 1 and a tap switching device. The winding unit 1 includes a main winding 11 and a matching tap winding 12. The two windings are distributed collinearly and are fixed by corresponding winding frames. The main winding 11 is connected to the power input, and the tap winding 12 is connected to the output and is connected to the neutral line through the tap switching device. The tap winding 12 forms multiple connectors 121, and each connector 121 includes a conductive metal block.

[0046] It is understandable that the above application scenario is three-phase electricity, so winding unit 1 corresponds to three phases and has a neutral line; in addition, it is known that in the transformer, tap winding 12 has multiple connection points externally formed for switching the number of coil turns, and this connection point is electrically connected to connector 121 in this embodiment.

[0047] Reference Figure 1 and Figure 2 In this embodiment, the tap switching device includes a transition protector 2, a tap switching wheel 3, a drive unit 1 4, a tap unit 5, a drive unit 2 6, and a controller 7.

[0048] The tap changer 3 is circular in side view and has a central shaft 33 fixed at its center. The central shaft 33 can be integrally formed or fixed to the tap changer 3. In use, one end of the central shaft 33 is rotatably connected to the inside of the transformer, for example, the side wall of the tap changer chamber; the other end of the central shaft 33 extends outward to the outside of the transformer.

[0049] The drive unit 4 includes a servo motor, which is connected to the outer end of the central shaft 33 via a gearbox or coupling. That is, the rotation of the servo motor can drive the tap switching wheel 3 to rotate, so as to cooperate with other structures to realize the tap switching action.

[0050] Because one end of the servo motor connected to the central axis extends outwards, it is relatively far away from the high-voltage area, making it safer and easier to maintain.

[0051] Multiple connectors 121 are vertically distributed. Example: Set up an insulating structural frame, which forms multiple horizontal bars along the vertical direction, and the outer ends of the horizontal bars are fixed with connectors 121.

[0052] Tap unit 5 includes a movable connector 51 and a second connector 52. The movable connector 51 is located to the side of the first connector 121 and is vertically slidable. Specifically:

[0053] Drive unit 2 6 includes an insulated protective rod 61 and a linear actuator 62. The protective rod 61 is vertically slidably connected to the transformer structure, with one end fixed to the moving joint 51 and the other end extending outward into the transformer. The linear actuator 62 can be an electric cylinder or a hydraulic cylinder equipped with a proportional valve, with its telescopic rod end fixed to the protective rod 61.

[0054] In use, the linear driver 62 drives the protective rod 61 to extend and retract, allowing the movable joint 51 to slide vertically. The movable joint 51 slides to the front of the joint 121 and contacts it, thus connecting the circuit.

[0055] Connector 2 52 is electrically connected to movable connector 51 via a cable, and is located to the side of tap changer 3. Tap changer 3 includes an insulated wheel body 31 and a conductive sector block 32. The sector block 32 occupies the wheel body 31 in the circumferential direction and can be installed by embedding. After rotation, it can contact connector 2 52. The sector block 32 is electrically connected to the neutral line via a cable, thereby forming a tap circuit. The wheel body 31 fixes the central shaft 33.

[0056] If the tap winding 12 is switched according to the above settings of tap unit 5, a power outage will occur during each switching process. Therefore, the further settings are as follows:

[0057] There are two tapping units 5, and the movable joints 51 of the two tapping units 5 are vertically distributed. The corresponding drive units 6 can be staggered to avoid interference. Similarly, there are also two joints 52, which are symmetrically distributed on both sides of the central axis of the wheel body 31.

[0058] At this time, if wheel 31 rotates, the sector block 32 switches between the two connectors 52. Although it is sector-shaped, a power outage will still occur during the switching process. Therefore, it is further configured as follows:

[0059] A transition protector 2 is provided, which includes a protective resistor R. One end of the protective resistor R is connected to the movable connector 51, and the other end is connected to connector 21. There are two transition protectors 2, which are matched with two tap units 5 respectively. The two connectors 21 are located on the side of the wheel body 31 and between the two connectors 52, and are symmetrically distributed along the center line of the wheel body 31.

[0060] Tap switching example: Assume that taps 121 are numbered 9, 8...2, 1 from top to bottom. Initially, the active movable tap 51 is connected to tap 9. The current goal is to switch to tap 7. Then:

[0061] 1) The other movable connector 51 is first moved to position 7;

[0062] 2) Rotate the wheel 31 to drive the sector block 32 to switch from one connector 2 52 to another connector 2 52 until the sector block 32 is separated from the original connector 2 52;

[0063] During this process, the switch from 9 gears to 7 gears can be completed. Since the sector block 32 will always protect the circuit connection with the help of the transition protector 2, there will be no power failure during the switch. Moreover, due to the limitation of the resistance R of the transition protector 2, no large current will be generated inside the tap switching device.

[0064] As can be seen from the above, because the switch is no longer made of a thin contact but a larger sector block 32, it is less likely to damage the equipment due to mechanical wear. At the same time, because the high-voltage area is mainly a mechanical structure, meaning there are fewer electronic components, its failure rate is relatively low, and its safety is relatively higher. Furthermore, because both connectors 52 are always energized during the switching process, the voltage difference between the sector block 32 (as the moving contact) and the energizer is smaller during switching; that is, the probability of arcing and the amount of energy generated during switching are lower.

[0065] It is understandable that the above-mentioned shifting process is also one of the reasons for the aforementioned misalignment of the two drive units 26. Example misalignment: the two moving joints 51 are distributed to the left and right so that the two drive units 26 are misaligned.

[0066] Refer to Figure 3 and Figure 4 In another embodiment of this application, the wheel body 31 is provided with a sliding groove 35, which is fan-shaped. The fan-shaped block 32 is slidably connected to the sliding groove 35 and the sliding direction is parallel to the central axis of the tap changer 3. The center of the tap changer 3 is fixed with a central shaft 33, and an oil passage is provided inside the central shaft 33. One end of the oil passage is used to connect to the sliding groove 35, and the other end extends outward to the on-load tap-changing transformer and is provided with an oil inlet and outlet.

[0067] A hydraulic structure 34 is fixed in the aforementioned chute 35 via a base. The hydraulic structure 34 includes a cylinder and a telescopic rod. The cylinder is mounted on the base, and the cylinder and the base are provided with channels for oil to enter and exit. The cylinder and the base are connected to the oil passage through the channels. The end of the telescopic rod extends out of the cylinder, and an insulating heat-insulating block is fixed to the end. The insulating heat-insulating block is fixed to the sector block 32. The insulating heat-insulating block is provided because heat or voltage will inevitably be generated during the use of this application. Therefore, a heat-insulating and insulating structure is required to prevent the hydraulic structure 34 from being affected by high temperature or voltage.

[0068] An oil supply ring 331 is fitted onto the central shaft 33. The oil supply ring 331 has a hollow structure and connects to the oil inlet and outlet. The oil supply ring 331 is connected to an oil quantity control unit 83, such as an oil pump, through a pipe. To ensure the sealing performance of the oil supply ring 331, a sealing ring can be fixed at the connection position between the oil supply ring 331 and the central shaft 33.

[0069] The above configuration is designed to address the issue that prolonged use of the tap changer 3 will cause partial wear to the sector block 32. After wear, the contact between the sector block 32 and connectors 52 and 21 will become less tight, potentially leading to poor contact and problems during use. Based on this configuration, by supplying oil into the oil ring 331, the oil flows through the oil passage into the cylinder, pushing out the piston and telescopic rod. This, in turn, pushes the sector block 32 out of the groove. Therefore, even if the sector block 32 is partially worn, partial removal of the sector block 32 can maintain effective contact between the sector block 32 and connectors 52 and 21.

[0070] In another embodiment of this application, the controller 7 is also electrically connected to an oil pressure detection unit 81, wherein the oil pressure detection unit 81 includes a pressure sensor, the pressure sensor is embedded in the ring body of the oil supply ring 331 and its detection end is inserted into the inside of the oil supply ring 331.

[0071] Reference Figure 3 and Figure 5 In another embodiment of this application, an insulated integrated wheel 332 is sleeved on the central shaft 33. The integrated wheel 332 is provided with four hydraulic structures 333, namely four miniature hydraulic cylinders. The specific structure is the same as the hydraulic structure 34 described above. The hydraulic structure 333 is connected to an oil pump 84 through a pipeline. An insulating heat-insulating block 2 is fixed to the telescopic rod end of the hydraulic structure 333. Each insulating heat-insulating block 2 is fixed to a connector 52 and a connector 21, respectively.

[0072] The reason for this structure is that during prolonged use, connectors 2 (52) and 3 (21) will experience slight wear, resulting in insufficient contact with the sector block 32. However, the adjusted position of the sector block 32 often corresponds to the currently contacting connector 2 (52) or connector 3 (21), and may not be able to effectively contact other connectors 2 (52) or connector 3 (21). Therefore, additional adjustment of the position of connector 2 (52) or connector 3 (21) is necessary. Through the above arrangement, the positions of connector 2 (52) or connector 3 (21) can be independently adjusted using each hydraulic structure 2 (333), ensuring effective contact with the sector block 32.

[0073] Reference Figure 6 In another embodiment of this application, the application further includes an oil pressure detection unit 82 for detecting the hydraulic pressure in the cylinder of the hydraulic structure 333. The oil pressure detection unit 82 is embedded in the inner wall of the cylinder and the detection end extends into the cylinder.

[0074] Oil pressure detection unit 2 82, oil pressure detection unit 1 81, oil quantity control unit 83, and oil pump 84 are electrically connected to the controller, which is configured as follows:

[0075] S1. Define two connectors 22 as A1 and A2 respectively, and two connectors 31 as B1 and B2 respectively, and arrange them in the circumferential direction of the tap-switching wheel 3 in the order of A1, B1, B2, A1.

[0076] S2. Obtain the rotation parameters of the tap-switching wheel 3; these rotation parameters are based on the rotation speed and rotation time of the drive unit 4.

[0077] S3. If the current rotation parameters match the position of A1, determine whether the detection value of the oil pressure detection unit 81 meets the standard. If not, control the oil quantity control unit 83 to supply oil to the hydraulic structure 34. The rotation parameters matching the position of A1 indicate that the current sector block 32 is in contact with the A1 connector. By determining whether the oil pressure detection value meets the standard, it can be inferred whether the hydraulic structure 34 is in a tight state, that is, whether the sector block 32 is in effective contact with A1.

[0078] S4. If the current rotation parameters match the position of B1, determine whether the detection value of the corresponding oil pressure detection unit 82 meets the standard. If not, control the oil pump 84 to supply oil to the corresponding hydraulic structure 333, that is, to supply oil to the hydraulic structure 333 corresponding to B1.

[0079] S5. If the current rotation parameters match the position of B2, determine whether the detection value of the corresponding oil pressure detection unit 82 meets the standard. If not, control the oil pump 84 to supply oil to the corresponding hydraulic structure 333, that is, to supply oil to the hydraulic structure 333 corresponding to B2.

[0080] S6. If the current rotation parameters match the position of A2, determine whether the detection value of the corresponding oil pressure detection unit 82 meets the standard. If not, control the oil pump 84 to supply oil to the corresponding hydraulic structure 333, that is, to supply oil to the hydraulic structure 333 corresponding to A2.

[0081] S7. If the current rotation parameters meet the conditions for completing the gear shift, then control the oil pump 84 to reset the hydraulic structure 333 corresponding to the connector 52 and connector 21 that are not in contact with the sector block 32. The condition for gear shifting means that connector 121 and connector 52 after gear shifting have been successfully connected. For example, the sector block 32 originally corresponded to position A1, and has now rotated to position A2.

[0082] With the above settings, the oil pressure in hydraulic structure 34 and hydraulic structure 333 can be monitored in real time by the oil pressure detection unit. This allows the determination of whether the sector block 32 and connector 52 or connector 21 are loose due to wear, thus overcoming the defect that it is difficult to observe whether the sector block 32 and connector 52 or connector 21 are in effective contact.

[0083] Reference Figure 3 and Figure 4The central shaft 33 is fitted with a conductive ring 334, which is fixed to the sector block 32. A conductive plate 335 is connected to the outside of the conductive ring 334. The conductive plate 335 is C-shaped and electrically connected to the neutral line. Through this setting, the grounding protection structure is connected by the center line, which can improve the safety of the system in case of failure.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A voltage and reactive power integrated control system comprising a winding unit (1) and a tapping switching device, the winding unit (1) comprising a main winding (11) and an adapted tapping winding (12), the tapping winding (12) being formed with a plurality of taps (121), characterized in that, Also includes: Transition protectors (2) are provided in two for each winding unit (1); The tap changer (3) is electrically connected to the neutral line; Drive unit 1 (4) is located on the on-load tap changer and is used to drive the tap changer wheel (3) to rotate; The tap unit (5) has at least two sets and includes a movable connector (51) for contacting connector one (121), and a connector two (52) electrically connected to the other end, and connector two (52) for contacting tap switching wheel (3). Drive unit 2 (6) is located on the on-load tap changer and is used to drive tap changer 5 to switch between multiple taps 1 (121); The controller (7) is electrically connected to drive unit one (4) and drive unit two (6). The transition protector (2) is connected in parallel to connector two (52), and one end is electrically connected to connector three (21) for contacting the tap switching wheel (3). The tap switching wheel (3) includes an insulated wheel body (31) and a conductive sector block (32). The sector block (32) is embedded in the wheel body (31) and is used to contact connector two (52) and connector three (21). Connectors two (52) and connector three (21) contact the sector block (32) from the side of the tap switching wheel (3). The two connectors (52) are symmetrically distributed on both sides of the central axis of the wheel body (31), and the two connectors (21) are located between the two connectors (52) and are symmetrically distributed on both sides of the central axis of the wheel body (31).

2. The voltage and reactive power integrated control system of claim 1, wherein: The wheel body (31) has a groove (35), the sector block (32) is slidably connected to the groove (35) and the sliding direction is parallel to the central axis of the tap changer (3). The center of the tap changer (3) is fixed with a central shaft (33). An oil passage is provided in the central shaft (33). One end of the oil passage is used to connect to the groove (35), and the other end extends outward to the on-load tap changer and is provided with an oil inlet and outlet. An oil supply ring (331) is sleeved on the central shaft (33). The oil supply ring (331) is a hollow structure and connects to the oil inlet and outlet. The oil supply ring (331) is connected to an oil quantity control unit (83).

3. The voltage and reactive power integrated control system of claim 2, wherein: The controller (7) is also electrically connected to an oil pressure detection unit (81), and the detection end of the oil pressure detection unit (81) is inserted into the oil supply ring (331).

4. The voltage and reactive power integrated control system of claim 2, wherein: A hydraulic structure (34) is provided in the slide groove (35). An insulating heat-insulating block is fixed to the telescopic rod end of the hydraulic structure (34). The insulating heat-insulating block is fixed to a fan-shaped block (32). The cylinder of the hydraulic structure (34) is connected to the oil passage.

5. The voltage and reactive power integrated control system of claim 4, wherein: An insulated integrated wheel (332) is fitted on the central shaft (33). Four hydraulic structures (333) are provided on the integrated wheel (332). The hydraulic structures (333) are connected to an oil pump (84). An insulating heat-insulating block (2) is fixed to the telescopic rod end of the hydraulic structure (333). Each insulating heat-insulating block (2) is fixed to a connector (52) and a connector (21).

6. The voltage and reactive power integrated control system according to claim 5, characterized in that: It also includes an oil pressure detection unit two (82) for detecting the hydraulic pressure in the cylinder of the hydraulic structure two (333), and the oil pressure detection unit two (82), oil pressure detection unit one (81), oil quantity control unit (83), and oil pump (84) are electrically connected to the controller (7). The controller (7) is configured as follows: Define two connectors (52) as A1 and A2 respectively, and two connectors (21) as B1 and B2 respectively, and arrange them in the circumferential direction of the tap switching wheel (3) in the order of A1, B1, B2, A2; Obtain the rotation parameters of the tap changer (3); If the current rotation parameters match the position of A1, then determine whether the detection value of the oil pressure detection unit (81) meets the standard. If not, control the oil quantity control unit (83) to supply oil to the hydraulic structure (34). If the current rotation parameters match the position of B1, then determine whether the detection value of the corresponding oil pressure detection unit two (82) meets the standard. If not, control the oil pump (84) to supply oil to the corresponding hydraulic structure two (333). If the current rotation parameters match the position of B2, then determine whether the detection value of the corresponding oil pressure detection unit (82) meets the standard. If not, control the oil pump (84) to supply oil to the corresponding hydraulic structure (333). If the current rotation parameters match the position of A2, then determine whether the detection value of the corresponding oil pressure detection unit (82) meets the standard. If not, control the oil pump (84) to supply oil to the corresponding hydraulic structure (333). If the current rotation parameters meet the conditions for completing the gear shift, then the control oil pump (84) resets the hydraulic structure two (333) corresponding to the joint two (52) and joint three (21) that are not in contact with the sector block (32).

7. The voltage and reactive power integrated control system according to claim 5, characterized in that: The transition protector (2) includes a protection resistor.

8. The integrated voltage and reactive power control system of claim 5, wherein: The central shaft (33) is fitted with a conductive ring (334), which is connected to the sector block (32). A conductive plate (335) is connected to the outside of the conductive ring (334), and the conductive plate (335) is electrically connected to the neutral line.

9. The voltage and reactive power integrated control system of claim 5, wherein: The second drive unit (6) includes a protective rod (61) and a linear driver (62). The protective rod (61) is vertically slidably connected to the transformer structure, with one end connected to the movable joint (51) and the other end extending outward from the transformer.

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