A transformer on-load tap changer voltage control system

Abstract

The application provides a transformer on-load tap changer voltage regulation control system and belongs to the technical field of transformers. The transformer on-load tap changer voltage regulation control system comprises a cabinet body and a control assembly, is arranged in a pre-installed electrical room, and is provided with a control panel on the cabinet body. The control assembly is arranged on the control panel and comprises a switch controller, a manual operation button, a changeover switch and a gear display. The switch controller is connected with the on-load tap changer. The switch controller is used for realizing parallel automatic voltage regulation of the on-load tap changer. The manual operation button is used for realizing parallel manual control of the on-load tap changer. The gear display is used for displaying the gear of the on-load tap changer. The transformer on-load tap changer voltage regulation control system is connected to realize parallel automatic voltage regulation or parallel manual voltage regulation of multiple on-load voltage regulation transformers. The structure is compact and convenient to install.

Description

Technical Field

[0001] This invention belongs to the field of transformer technology, specifically relating to a transformer on-load tap changer voltage regulation control system. Background Technology

[0002] Prefabricated electrical rooms are integrated outdoor power distribution and transformation solutions. They can be designed and laid out according to the owner's or designer's requirements, housing main electrical equipment such as high-voltage switchgear, low-voltage switchgear, transformers, medium and low-voltage frequency converters, and data acquisition and monitoring control systems within a customized, movable steel structure room. Prefabricated electrical rooms allow for pre-planning and installation of internal equipment based on usage needs. Various prefabricated electrical rooms can be transported to the construction site as a whole, placed in their respective workstations, and put into use immediately upon power connection. They can also be moved to different locations as needed. Prefabricated electrical rooms offer shorter on-site installation, commissioning, and start-up times, significantly reducing on-site civil engineering work and timelines. They provide a high-quality and efficient replacement for traditional on-site civil engineering substations and electrical rooms, primarily used in the oil, gas, mining, and process industries. Prefabricated electrical rooms offer advantages such as compact structure and convenient installation and relocation. In prefabricated electrical rooms, depending on usage requirements, two or more on-load tap-changing transformers are sometimes installed and put into operation in parallel. When on-load tap-changing transformers are operating in parallel, it is necessary to ensure that the rated voltage and voltage ratio of the primary and secondary sides of the multiple transformers are equal. Therefore, during voltage regulation control, it is necessary to ensure that the on-load tap changers operate simultaneously and that the tap positions of each on-load tap changer are synchronized. Otherwise, the parallel operation of the on-load tap changers will fail, adversely affecting the safe operation of the equipment. Controlling the on-load tap changers often requires the coordination of numerous relays or the use of dedicated parallel controllers. However, in practice, this results in a complex structure, numerous joints, unstable connections, and a susceptibility to malfunctions, making synchronous control of the on-load tap changers difficult. Summary of the Invention

[0003] The purpose of this invention is to provide a transformer on-load tap changer control system, which aims to solve the problem that it is not easy to synchronize the on-load tap changers of multiple on-load tap changers in a prefabricated electrical room.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a transformer on-load tap changer voltage regulation control system, comprising:

[0005] A cabinet, installed within a prefabricated electrical room, has an internal storage space and a control panel mounted on its surface; and

[0006] A control component is provided on the control panel; the control component includes a switch controller, a manual operation button, a selector switch, and a gear position display. The switch controller is connected to an on-load tap changer and is used to realize automatic voltage regulation of the on-load tap changer in parallel. The manual operation button is used to realize manual control of the on-load tap changer in parallel. The gear position display is used to display the gear position of the on-load tap changer.

[0007] In one possible implementation, a signal acquisition component is also included. The signal acquisition component is disposed inside the cabinet and includes a signal acquisition device and a transmission optical fiber. The signal acquisition device is connected to an on-load tap changer and is used to acquire the operation information and fault information signals of the on-load tap changer. The transmission optical fiber is connected to the signal acquisition device and is used to transmit the acquired information signals to a remote monitoring device.

[0008] In one possible implementation, a smart communication unit is also included. The smart communication unit is installed inside the cabinet and is connected to the switch controller, converting the switch controller's signals into Ethernet signals for external transmission.

[0009] In one possible implementation, the control panel is equipped with a selector switch, which is connected to the switch controller and the manual operation button to switch between automatic and manual control.

[0010] In one possible implementation, the control panel is provided with an operation indicator light, which is connected to the manual operation button and the on-load tap changer, and displays the operation status of the manual operation button.

[0011] In one possible implementation, the selector switch is provided in three sets, including a first selector switch, a second selector switch and a third selector switch. The first selector switch is connected to a relay to realize gear consistency judgment and function selection.

[0012] In one possible implementation, the second transfer switch and the third transfer switch are respectively connected to the switch controller, for switching between the parallel automatic voltage regulation state of the on-load tap changer and the parallel manual control state of the on-load tap changer.

[0013] In one possible implementation, the gear position display is connected to the switch controller and is used to display the current gear position of the on-load tap changer.

[0014] In one possible implementation, the signal acquisition component is located at the upper end of the cabinet, the gear position display and the operation indicator are located below the signal acquisition component, the selector switch is located below the gear position display and the operation indicator, and the switch controller is located below the selector switch.

[0015] In one possible implementation, the gear position display is located on one side of the operation indicator light.

[0016] The beneficial effects of the transformer on-load tap changer voltage regulation control system provided by this invention are as follows:

[0017] Compared with existing technologies, this invention includes a cabinet and control components. The cabinet is installed in a prefabricated electrical room, and the control components are housed within the cabinet's internal space. The control components include a switch controller, manual operation buttons, a selector switch, and a position indicator. The switch controller is connected to the on-load tap changer for easy control and is located on the control panel, enabling automatic parallel voltage regulation of the on-load tap changer. The manual operation buttons are also located on the control panel for manual operation control of the on-load tap changer. The on-load tap changer can be controlled automatically by the switch controller or manually by the manual operation buttons, allowing selection of the control mode based on actual conditions. The position indicator on the control panel displays the current position of the on-load tap changer in real time, facilitating operation. The cabinet is installed in the prefabricated electrical room, and as the prefabricated electrical room is installed on the project site, it enables automatic or manual parallel voltage regulation of multiple on-load tap changers. The structure is compact and easy to install. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the control panel used in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure of the voltage regulation control system provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure of the first changeover switch used in an embodiment of the present invention;

[0022] Figure 4 for Figure 3A magnified view of part A;

[0023] Figure 5 for Figure 3 A magnified view of part B;

[0024] Figure 6 for Figure 3 A magnified view of part C;

[0025] Figure 7 This is a schematic diagram of the connection structure of the third changeover switch used in an embodiment of the present invention.

[0026] In the diagram: 1. Cabinet; 2. Manual operation button; 3. Operation indicator light; 4. Changeover switch; 5. Gear position display; 6. Signal acquisition component; 7. Control panel; 8. On-load tap changer; 9. Intelligent communication unit; 10. Switch controller; 11. First changeover switch; 12. Second changeover switch; 13. Third changeover switch; 14. First relay; 15. Second relay. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] Please refer to Figures 1 to 7 The present invention provides a specific embodiment of a transformer on-load tap changer voltage regulation control system, comprising: a cabinet 1 and control components. The cabinet 1 is installed in a prefabricated electrical room and has an internal accommodating space. A control panel 7 is installed on the cabinet 1. The control components are installed on the control panel 7 and include a switch controller 10, a manual operation button 2, a changeover switch 4, and a position display 5. The switch controller 10 is connected to the on-load tap changer 8 and is used to realize the parallel automatic voltage regulation of the on-load tap changer 8. The manual operation button 2 is used to realize the parallel manual control of the on-load tap changer 8, and the position display 5 is used to display the position of the on-load tap changer 8.

[0029] This invention provides a transformer on-load tap changer voltage regulation control system. Compared with the prior art, it includes a cabinet 1 and control components. The cabinet 1 is installed in a prefabricated electrical room, and the control components are installed in the internal space of the cabinet 1. The control components include a switch controller 10, a manual operation button 2, a changeover switch 4, and a tap position display 5. The switch controller 10 is connected to the electric mechanism box of the on-load tap changer 8, facilitating the control of the on-load tap changer 8. The switch controller 10 is located on a control panel 7 to realize parallel automatic voltage regulation of the on-load tap changer 8. The manual operation button 2 is located on the control panel 7 to control the on-load tap changer. The switch 8 is manually operated. The on-load tap changer 8 can be automatically controlled by the switch controller 10 or manually controlled by the manual operation button 2. The control mode can be selected according to the actual situation. The position display 5 is set on the control panel 7. The position display 5 can display the current position of the on-load tap changer 8 in real time, which is convenient for operation. The cabinet 1 is installed in the prefabricated electrical room. As the prefabricated electrical room enters the project site, it realizes the parallel automatic voltage regulation or parallel manual voltage regulation of multiple on-load tap changing transformers. The structure is compact and easy to install. It realizes the parallel automatic voltage regulation of the on-load tap changer 8 according to the reference voltage.

[0030] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 1 It also includes a signal acquisition component 6, which is installed inside the cabinet 1. The signal acquisition component 6 includes a signal acquisition device and a transmission optical fiber. The signal acquisition device is connected to the on-load tap changer 8 and is used to acquire the action information and fault information signal of the on-load tap changer 8. The transmission optical fiber is connected to the signal acquisition device and is used to transmit the acquired information signal to the remote monitoring equipment.

[0031] For details, please refer to Figure 1 It is also equipped with a signal acquisition component 6, which is used for signal acquisition and transmission. The signal acquisition component 6 is set in the housing space of the cabinet 1. The signal acquisition component 6 includes a signal acquisition device and a transmission optical fiber. The signal acquisition device is connected to the on-load tap changer 8 and the on-load tap changer transformer, and acquires the action information and fault information signal of the on-load tap changer 8 and the measurement and control signal of the on-load tap changer transformer. The transmission optical fiber is connected to the signal acquisition device and is used to transmit the acquired information signals to the remote monitoring equipment to monitor the usage of the device at all times, detect problems in the operation process in a timely manner, and deal with them in a timely manner.

[0032] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 2 It also includes an intelligent communication unit 9, which is installed inside the cabinet 1. The intelligent communication unit 9 is connected to the switch controller 10 and converts the signal of the switch controller 10 into an Ethernet signal for external transmission.

[0033] For details, please refer to Figure 2 It is also equipped with an intelligent communication unit 9, which is installed inside the cabinet 1. The intelligent communication unit 9 is used to transmit the signal of the switch controller 10 to the outside. The intelligent communication unit 9 is connected to terminals 4 and 5 of the switch controller 10, converts the signal of the switch controller 10 into an Ethernet signal, and transmits the obtained signal to the outside to connect to remote detection equipment, so as to facilitate remote control of the device.

[0034] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 1 The control panel 7 is equipped with a changeover switch 4, which is connected to the switch controller 10 and the manual operation button 2 to switch between automatic and manual control.

[0035] For details, please refer to Figure 1 It is also equipped with a changeover switch 4, which is located on the control panel 7 and connected to the switch controller 10. The changeover switch 4 is used to switch between automatic control and manual control by the switch controller 10.

[0036] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 1 The control panel 7 is equipped with an operation indicator light 3, which is connected to the manual operation button 2 and the on-load tap changer 8, and displays the operation status of the manual operation button 2.

[0037] For details, please refer to Figure 1 The control panel 7 is also equipped with operation indicator lights 3. The operation indicator lights 3 display the status of each component in the device in real time. There are multiple operation indicator lights 3. The multiple operation indicator lights 3 are respectively connected to the manual operation button 2 or the on-load tap changer 8. The operation indicator lights 3 display the operation status of the manual operation button 2, which facilitates the manual control of the switch controller 10.

[0038] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figures 1 to 7 The changeover switch 4 is provided with three sets, including a first changeover switch 11, a second changeover switch 12 and a third changeover switch 13. The first changeover switch 11 is connected to the relay to realize the consistency judgment of the gear position and the function selection.

[0039] For details, please refer to Figures 1 to 7 There are three sets of changeover switches 4, which are defined as first changeover switch 11, second changeover switch 12 and third changeover switch 13 respectively. First changeover switch 11 is connected to the relay in the cabinet 1 and is used to judge the consistency of the gear position and select the function in the current state.

[0040] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figures 1 to 7 The second changeover switch 12 and the third changeover switch 13 are respectively connected to the switch controller 10 and are used to switch the parallel automatic voltage regulation state of the on-load tap changer 8 or the parallel manual control state of the on-load tap changer 8.

[0041] For details, please refer to Figures 1 to 7 The second changeover switch 12 and the third changeover switch 13 are both connected to the switch controller 10. The second changeover switch 12 and the third changeover switch 13 work together to switch between the parallel automatic voltage regulation state and the parallel manual control state of the on-load tap changer 8.

[0042] For further details, please refer to Figures 1 to 7 The first changeover switch 11 and the relay form a circuit through an electrical circuit to realize the consistent judgment of the gear position and the function operation. The second changeover switch 12 is connected to terminals 13 and 14 of the CX3 terminal block of the switch controller 10. The third changeover switch 13 is connected to terminals 8, 9, 10 and 11 of the CX3 terminal block of the switch controller 10. By switching the switch position of the second changeover switch 12, the parallel automatic voltage regulation state or the parallel manual control state of the on-load tap changer 8 can be switched.

[0043] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figures 1 to 7 The third changeover switch 13 is connected to the switching point of the relay and is used to control the voltage boosting, voltage reduction or stop operation of the on-load tap changer 8.

[0044] For details, please refer to Figures 1 to 7 The third changeover switch 13 is connected to the switching points of the coils of the first relay 14 and the second relay 15. The switching points of the coils of the first relay 14 and the second relay 15 are also connected to the electric mechanism box. The voltage boosting, voltage reduction or stop operation control of the on-load tap changer 8 is realized by changing the switching state of the third changeover switch.

[0045] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figures 1 to 7 The gear position display 5 is connected to the switch controller 10 and is used to display the current gear position of the on-load tap changer 8.

[0046] For details, please refer to Figures 1 to 7 The gear position display 5 is connected to the switch controller 10. The gear position display 5 is connected to the CX1 terminal block of the switch controller 10. The gear position display 5 displays the current gear position status of the switch controller 10 in real time, which makes it easier to judge the current gear position status and facilitates the operation of the device.

[0047] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 1 The signal acquisition component 6 is located at the top of the cabinet 1, the gear position display 5 and the operation indicator light 3 are located below the signal acquisition component 6, the changeover switch 4 is located below the gear position display 5 and the operation indicator light 3, and the switch controller 10 is located below the changeover switch 4.

[0048] For details, please refer to Figure 1 The control panel 7 is arranged from top to bottom as follows: signal acquisition component 6, gear position display 5, operation indicator light 3, changeover switch 4, and switch controller 10. The gear position display 5 and operation indicator light 3 are located in the upper middle position for easy observation, and the changeover switch 4 is located in the middle for easy operation.

[0049] As a specific embodiment of the transformer on-load tap changer voltage regulation control system provided by the present invention, please refer to Figure 1 The gear position display 5 is located on one side of the operation indicator light 3.

[0050] For details, please refer to Figure 1 The gear position display 5 is located on one side of the operation indicator light 3 for easy observation.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A transformer on-load tap changer voltage regulating control system, characterized by, The utility model relates to a kind of pre-installed electrical room control cabinet, including: Cabinet, be arranged in pre-installed electrical room, the accommodating space is arranged inside the cabinet, and control panel is arranged on the cabinet; And Control assembly, be arranged on the control panel;The control assembly includes switch controller, manual operation button, change-over switch and gear display, the switch controller is connected with load tap changer, the switch controller is used to realize the parallel automatic voltage regulation of load tap changer, the manual operation button is used to realize the parallel manual control of load tap changer, the gear display is used to show the gear of load tap changer, change-over switch is arranged on the control panel, and the switch controller, the manual operation button are connected to realize the switching of automatic control and manual control. The change-over switch is provided with three groups, including first change-over switch, second change-over switch and third change-over switch, the first change-over switch is connected with relay in the cabinet, and the first change-over switch and relay form loop through electrical circuit, realize gear consistency judgment and function selection, the second change-over switch and the third change-over switch are connected with the switch controller respectively, the second change-over switch is connected with the 13 and 14 of CX3 terminal row of the switch controller, the third change-over switch is connected with the 8,9,10 and 11 of CX3 terminal row of the switch controller, for switching the parallel automatic voltage regulation state of load tap changer or the parallel manual control state of load tap changer, the third change-over switch is connected with the switch point of the coil of first relay and second relay, and the switch point of the coil of first relay and second relay is also connected with electric mechanism box, and the voltage increasing, voltage reducing or stop operation control of load tap changer is realized by the change of switch state of the third change-over switch. The cabinet is installed in pre-installed electrical room, and the parallel automatic voltage regulation or parallel manual voltage regulation of multiple load voltage regulating transformers is realized as pre-installed electrical room enters engineering site.

2. A control system for a transformer on-load tap changer as claimed in claim 1, wherein, It also includes signal acquisition assembly, and the signal acquisition assembly is arranged in the cabinet, including signal collector and transmission optical fiber, the signal collector is connected with load tap changer, for collecting action information and fault information signal of load tap changer, the transmission optical fiber is connected with the signal collector, for transmitting the collected information signal to remote monitoring equipment.

3. A control system for a transformer on-load tap changer as defined in claim 2, characterized in that It also includes intelligent communication machine, and the intelligent communication machine is arranged in the cabinet, and the intelligent communication machine is connected with the switch controller, and converts the signal of the switch controller into Ethernet signal for external transmission.

4. A control system for a transformer on-load tap changer as defined in claim 3, characterized in that Operation indicator lamp is arranged on the control panel, and the operation indicator lamp is connected with the manual operation button and load tap changer, and the operation state of the manual operation button is displayed.

5. A control system for a transformer on-load tap changer as defined in claim 4, characterized in that The gear display is connected with the switch controller, for displaying the current gear of load tap changer.

6. A control system for a transformer on-load tap changer as defined in claim 5, characterized in that The signal acquisition assembly is arranged at the upper end of the cabinet, the gear display and the operation indicator lamp are arranged below the signal acquisition assembly, the change-over switch is arranged below the gear display and the operation indicator lamp, and the switch controller is arranged below the change-over switch.

7. A control system for a transformer on-load tap changer as defined in claim 6, characterized in that The gear display is disposed at one side of the operation indicator lamp.

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