Box transformer high voltage side power supply monitoring device based on voltage transformer

Abstract

This utility model relates to the field of wind turbine generator box-type transformer technology, specifically to a high-voltage side power supply monitoring device for a box-type transformer based on a voltage transformer. The device includes: a first voltage side, a box-type transformer, a second voltage side, a UPS, a dual-power switching device, and a power consumption side connected in sequence. The first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer. The first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual-power switching device, and the first voltage switch is connected to one end of the box-type transformer. This utility model improves the power supply reliability of wind farms, achieves efficient automated management, quickly responds to faults, reduces safety hazards, ensures stable operation, and promotes the intelligent transformation of the wind power industry.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine generator box-type transformer technology, and more specifically, to a power supply monitoring device for the high-voltage side of a box-type transformer based on a voltage transformer. Background Technology

[0002] Prefabricated transformers play a crucial role in wind power generation. They not only step up the low-voltage electricity generated by wind turbines to high voltage, but also ensure that the electricity is transmitted to the wind farm's substation with minimal loss via buried cables or overhead lines. Currently, most prefabricated transformers have low levels of overall automation, making effective monitoring and remote management of equipment impossible. This is especially problematic in remote mountain wind farms where wind turbines are widely distributed, making it difficult for operators to monitor the status of remote equipment in a timely manner. In the event of a fault, troubleshooting and repair are extremely inefficient. Furthermore, traditional power supply systems often cannot meet the urgent switching needs after prolonged power outages, resulting in consistently low reliability and hot standby capabilities for wind farm operations. Utility Model Content

[0003] The purpose of this invention is to provide a power supply monitoring device for the high-voltage side of a transformer substation based on a voltage transformer. This device improves the power supply reliability of wind farms, enables efficient automated management, rapid fault response, reduces safety hazards, ensures stable operation, and promotes the intelligent transformation of the wind power industry.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A voltage transformer-based high-voltage side power supply monitoring device for a transformer substation includes: a first voltage side, a box-type transformer, a second voltage side, a UPS, a dual power supply switching device, and a power consumption side connected in sequence; wherein, the first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer, wherein the first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual power supply switching device, and the first voltage switch is connected to one end of the box-type transformer.

[0006] Optionally, the second voltage side includes: a second voltage switch and an auxiliary transformer; one end of the second voltage switch is connected to the other end of the box-type transformer and one end of the auxiliary transformer, the other end of the auxiliary transformer is connected to one end of the UPS, and the other end of the UPS is connected to one end of the dual power supply switching device.

[0007] Optionally, the second voltage side further includes: a power supply device; the power supply device is connected to the other end of the second voltage switch.

[0008] Optionally, the power supply equipment is specifically a wind turbine, which is connected to the other end of the second voltage switch.

[0009] Optionally, the power consumption side includes: a ring network communication device; the ring network communication device is connected to the other end of the dual power supply switching device.

[0010] Optionally, the power consumption side further includes: a protection and control device; the protection and control device is connected to the other end of the dual power supply switching device.

[0011] Optionally, the first voltage cable inlet further includes: a capacitor, an LED, a surge arrester, and a fuse; one end of the LED is grounded, the other end of the LED is connected to one end of the capacitor, the other end of the capacitor is connected to one end of the first voltage switch, one end of the surge arrester, and one end of the fuse and grounded, the other end of the surge arrester is grounded, and the other end of the fuse is connected to the first voltage winding of the voltage transformer.

[0012] Optionally, the voltage value of the first voltage is greater than the voltage value of the second voltage.

[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0014] This invention significantly improves the reliability and safety of power supply in wind farms. Firstly, it uses voltage transformers to monitor the high-voltage side voltage in real time, ensuring stable power transmission and reducing the occurrence of faults. Secondly, the combination of a dual-power switching device and a UPS enables rapid and automatic power switching in the event of a power outage or equipment failure, ensuring continuous power supply to critical equipment. This invention reduces reliance on manual operation, ensures safe closing of both high-voltage and low-voltage sides, provides strong support for the continuous and stable operation of wind farms, and promotes the development of the wind power industry towards greater efficiency and safety. Attached Figure Description

[0015] Figure 1 A circuit diagram of the voltage transformer-based high-voltage side power supply monitoring device for transformer substations provided by this utility model;

[0016] Figure 2 A partial circuit diagram of the first voltage cable inlet provided by this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] like Figure 1 , Figure 2 As shown, this utility model provides one embodiment: a power supply monitoring device for the high-voltage side of a transformer substation based on a voltage transformer, comprising: a first voltage side, a transformer substation, a second voltage side, a UPS, a dual power supply switching device, and a power consumption side connected in sequence; wherein, the first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer, wherein the first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual power supply switching device, and the first voltage switch is connected to one end of the transformer substation.

[0019] The second voltage side includes: a second voltage switch and an auxiliary transformer; one end of the second voltage switch is connected to the other end of the box-type transformer and one end of the auxiliary transformer, the other end of the auxiliary transformer is connected to one end of the UPS, and the other end of the UPS is connected to one end of the dual power supply switching device.

[0020] In this specific application, the first voltage is defined as high voltage and the second voltage as low voltage. Specifically, in this embodiment, a voltage transformer is added to the high-voltage side of the transformer substation, and the voltage transformer is arranged at the cable inlet of the high-voltage side of the transformer substation. The process of switching the collector line from a de-energized state to a energized state: After a long period of power outage, during the power restoration process, the high-voltage side cable inlet of the collector line connected to the transformer substation becomes energized, and the voltage transformer arranged at the high-voltage side cable inlet of the transformer substation becomes energized. At this time, the line connected by the low-voltage winding of the voltage transformer is directly connected to the dual-power switching device. The dual-power switching device determines that the current comes from the low-voltage winding of the voltage transformer at the high-voltage side cable inlet of the collector line, and directly provides the operating control power for the high and low voltage side circuit breakers of the transformer substation, as well as the protection and control and ring network communication power. At this time, the operating control power for the high and low voltage side circuit breakers of the transformer substation, as well as the protection and control and ring network communication power, have a stable external power supply environment, requiring no additional manual external charging, and are ready to operate the high and low voltage side circuit breakers of the transformer substation, realizing the line closing operation. After the line closing operation is completed, the high and low voltage sides of the transformer box and the low voltage side of the auxiliary transformer are all energized and working normally. At this time, the main circuit of the line supplies power to the UPS. After the UPS is charged and stabilized, the dual power supply switching device switches the operating control power supply of the high and low voltage side circuit breakers of the transformer box, as well as the protection and control, and ring network communication power supply, to the main circuit power supply environment.

[0021] In another specific application of this embodiment, if the high-voltage collector line is misoperated or misjudged as losing power, the power supply restoration process is as follows: the UPS device supplies power to the protection and control device, high-voltage switch, low-voltage switch, and ring network communication through a dual power supply switching device. After the main circuit is de-energized, the high-voltage and low-voltage switches can be operated to close the main circuit circuit.

[0022] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A box transformer high-voltage side power supply monitoring device based on a voltage transformer, characterized in that, include: The system comprises, in sequence, a first voltage side, a box-type transformer, a second voltage side, a UPS, a dual power supply switching device, and a power consumption side; wherein, the first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer, wherein the first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual power supply switching device, and the first voltage switch is connected to one end of the box-type transformer.

2. The voltage transformer based box transformer high voltage side power supply monitoring device according to claim 1, characterized in that, The second voltage side includes: a second voltage switch and an auxiliary transformer; one end of the second voltage switch is connected to the other end of the box-type transformer and one end of the auxiliary transformer, the other end of the auxiliary transformer is connected to one end of the UPS, and the other end of the UPS is connected to one end of the dual power supply switching device. 3.The voltage transformer based box transformer high voltage side power supply monitoring device according to claim 2, characterized in that, The second voltage side further includes: a power supply device; the power supply device is connected to the other end of the second voltage switch.

4. The voltage transformer based box transformer high voltage side power supply monitoring device according to claim 3, characterized in that, The power supply equipment is specifically a wind turbine, which is connected to the other end of the second voltage switch.

5. The voltage transformer-based high-voltage side power supply monitoring device for transformer substations according to claim 3, characterized in that, The power consumption side includes: a ring network communication device; the ring network communication device is connected to the other end of the dual power supply switching device.

6. The voltage transformer-based high-voltage side power supply monitoring device for transformer substations according to claim 5, characterized in that, The power consumption side also includes: a protection and control device; the protection and control device is connected to the other end of the dual power supply switching device.

7. The voltage transformer-based high-voltage side power supply monitoring device for transformer substations according to claim 6, characterized in that, The first voltage cable inlet also includes: a capacitor, an LED, a surge arrester, and a fuse; one end of the LED is grounded, the other end of the LED is connected to one end of the capacitor, the other end of the capacitor is connected to one end of the first voltage switch, one end of the surge arrester, and one end of the fuse and grounded, the other end of the surge arrester is grounded, and the other end of the fuse is connected to the first voltage winding of the voltage transformer.

8. The voltage transformer-based high-voltage side power supply monitoring device for transformer substations according to any one of claims 1-7, characterized in that, The voltage value of the first voltage is greater than the voltage value of the second voltage.

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