Relay protection device starting circuit, tower bottom control cabinet and wind generating set
By designing a self-starting circuit with an auxiliary contact for a live display in a wind turbine generator set, the problem of time-consuming and labor-intensive manual starting of relay protection devices is solved, achieving the effects of self-starting and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SANY ELECTRIC CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-28
AI Technical Summary
In the existing technology, the start-up of the relay protection device of wind turbine generator set requires manual operation, which is time-consuming and labor-intensive, and increases the workload and cost when the turbines are located in a distributed manner.
Design a relay protection device start-up circuit, and use the auxiliary contacts of the live display to construct the tower base uninterruptible power supply self-starting circuit, start the relay protection device through the uninterruptible power supply, avoid manual operation, and reduce hardware costs.
The self-starting of the relay protection device was achieved, which reduced time and labor costs, reduced the difficulty of power supply on site, and reduced hardware costs.
Smart Images
Figure CN224177967U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind power generation technology, and in particular to a relay protection device starting circuit, a tower base control cabinet, and a wind turbine generator set. Background Technology
[0002] In the field of wind power technology, the safety and stability of wind turbine generators are of paramount importance.
[0003] To ensure the safety and stability of wind turbine generator operation, the relay protection device needs to be activated simultaneously when the wind turbine generator is powered on.
[0004] In related technologies, when starting the relay protection device, it is usually necessary for staff to manually start the relay protection device in each wind turbine generator set. This starting method is time-consuming and labor-intensive. Utility Model Content
[0005] This application provides a relay protection device start-up circuit, a tower base control cabinet, and a wind turbine generator set to achieve the effect of self-starting of the relay protection device and reducing hardware costs.
[0006] In a first aspect, this application provides a relay protection device startup circuit, the circuit comprising at least: a first battery, a charged display, a relay, an uninterruptible power supply, and a relay protection device; wherein...
[0007] The positive terminal of the first battery is connected to one end of the charged display, and the negative terminal of the first battery is connected to the negative terminal of the uninterruptible power supply.
[0008] The other end of the energized display is connected to one end of the relay; the other end of the relay is connected to the positive terminal of the uninterruptible power supply.
[0009] After the first battery is powered on, the uninterruptible power supply is powered through the energized display and the relay, and the relay protection device is activated according to the uninterruptible power supply.
[0010] In one possible implementation, the energized display includes a normally open contact; one end of the normally open contact is connected to the positive terminal of the first battery; the other end of the normally open contact is connected to one end of the relay.
[0011] After the first battery is powered on, the normally open contact of the live display closes, so that the first battery supplies power to the uninterruptible power supply through the live display and the relay, thereby starting the uninterruptible power supply.
[0012] After startup, the uninterruptible power supply is used to supply power to the relay protection device in order to activate the relay protection device.
[0013] In one possible implementation, the relay includes an energized coil and a normally closed contact; one end of the normally closed contact is connected to the other end of the energized display; the other end of the normally closed contact is connected to the positive terminal of the uninterruptible power supply.
[0014] The energizing coil is used to control the normally closed contact of the relay to open after the first battery is powered on, so that the first battery stops supplying power to the uninterruptible power supply.
[0015] In one possible implementation, the relay indicates a time-delay relay; the time-delay relay is configured to disconnect after a delay following power-on of the first battery, so that the first battery stops supplying power to the uninterruptible power supply.
[0016] In one possible implementation, the relay also indicates a protection relay.
[0017] In one possible implementation, the protective relay is connected to the circuit where the switching power supply is located;
[0018] The protection relay is used to supply power to the energized coil of the protection relay after the switching power supply line is energized, so as to control the normally closed contacts of the protection relay to open according to the energized coil, so as to stop the first battery from supplying power to the uninterruptible power supply.
[0019] In one possible implementation, the circuit further includes a maintenance switch; one end of the maintenance switch is connected in series with the relay; the other end of the maintenance switch is connected in series with the positive terminal of the uninterruptible power supply.
[0020] The maintenance switch is used to disconnect during manual maintenance so that the first battery stops supplying power to the uninterruptible power supply.
[0021] In one possible implementation, the circuit further includes a second battery, the two ends of which are connected to the two ends of the charged display to supply power to the charged display.
[0022] Secondly, this application provides a tower base control cabinet, including the relay protection device start-up circuit described in any one of the first aspects above.
[0023] Thirdly, this application provides a wind turbine generator set, including the tower base control cabinet and switch cabinet described in the second aspect above.
[0024] This application provides a relay protection device starting circuit, a tower-based control cabinet, and a wind turbine generator set. It utilizes the auxiliary contacts of a live indicator to construct a self-starting circuit for the tower-based uninterruptible power supply (UPS). This allows the UPS to start the relay protection device, avoiding the need for manual cold starting of each UPS unit. This enables remote closing and relay protection device activation, reducing time, labor, and on-site power supply difficulties. Furthermore, it lowers hardware costs compared to adding a voltage transformer cabinet. Attached Figure Description
[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0026] Figure 1 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 1 ;
[0027] Figure 2 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 2 ;
[0028] Figure 3 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 3 ;
[0029] Figure 4 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 4 ;
[0030] Figure 5 This is a schematic diagram of the structure of a tower base control cabinet provided in an embodiment of this application;
[0031] Figure 6 This is a schematic diagram of the structure of a wind turbine generator set provided in an embodiment of this application.
[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.
[0034] In the field of wind power technology, the safety and stability of wind turbine generators are of paramount importance.
[0035] To ensure the safety and stability of wind turbine generator operation, the relay protection device needs to be activated simultaneously when the wind turbine generator is powered on.
[0036] In one implementation, when starting the relay protection device, it is usually necessary for staff to manually start the relay protection device in each wind turbine. This starting method is time-consuming and labor-intensive. In addition, in large wind farms or when the locations of wind turbines are relatively dispersed, it will not only increase the workload but also increase the time cost.
[0037] In another implementation, a voltage transformer cabinet can be added to the busbar, and a signal can be sent to the relay protection device through the voltage transformer cabinet to activate the relay protection device. This activation method requires adding a voltage transformer cabinet for each wind turbine generator set, which is costly.
[0038] The relay protection device startup circuit provided in this application can be designed using the auxiliary contacts of the energized display, which not only realizes the self-starting of the relay protection device, but also reduces costs, thereby solving the above-mentioned technical problems.
[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0040] Figure 1 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 1 ,like Figure 1 As shown, the relay protection device startup circuit includes at least: a first battery 101, a live display 102, a relay 103, an uninterruptible power supply 104, and a relay protection device 105.
[0041] The positive terminal of the first battery 101 is connected to one end of the charged display 102, and the negative terminal of the first battery 101 is connected to the negative terminal of the uninterruptible power supply 104; the other end of the charged display 102 is connected to one end of the relay 103; and the other end of the relay 103 is connected to the positive terminal of the uninterruptible power supply 104.
[0042] After the first battery 101 is powered on, it supplies power to the uninterruptible power supply 104 via the live display 102 and the relay 103, and then activates the relay protection device 105 according to the uninterruptible power supply 104.
[0043] In one example, the relay protection device startup circuit provided in this application embodiment can be applied to the tower base control cabinet of each wind turbine in a wind farm, or the relay protection device startup circuit can be realized by establishing a line connection between the tower base control cabinet and the switch cabinet and reusing the components in the switch cabinet.
[0044] At this point, the first battery 101 can be understood as the battery inside the control cabinet at the bottom of the wind turbine tower.
[0045] In one example, the live indicator 102 can be understood as an existing live indicator in the switch cabinet, or it can be a newly installed live indicator; there is no limitation on this here.
[0046] In one example, the live display 102 may include auxiliary contacts. In this case, the first battery 101 can be connected to the auxiliary contacts of the live display, thereby realizing the live display in the multiplex switch cabinet.
[0047] In one example, relay 103 can be used to disconnect the relay protection device startup circuit in a timely manner after the relay protection device startup circuit is energized and the relay protection device 105 is started according to the uninterruptible power supply 104.
[0048] In the above embodiments, the auxiliary contacts of the live indicator can be used to construct the self-starting circuit of the uninterruptible power supply (UPS) at the base of the tower. This allows the UPS to start the relay protection device, avoiding the need for manual cold starting of each UPS unit. This enables remote closing and activation of the relay protection device, reducing time and labor costs and simplifying on-site power supply. Furthermore, compared to adding a voltage transformer cabinet, this method reduces hardware costs.
[0049] In one alternative implementation, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 2 ,exist Figure 1 Based on the relay protection device startup circuit shown, the relay protection device startup circuit provided in this application will be further described. For example... Figure 2As shown, the live display 102 in the relay protection device start-up circuit includes a normally open contact 1021.
[0050] One end of the normally open contact 1021 is connected to the positive terminal of the first battery 101; the other end of the normally open contact 1021 is connected to one end of the relay 103.
[0051] like Figure 2 As shown, when the line where the live display 102 is located is not energized, the normally open contact 1021 included in the live display 102 is in the open state.
[0052] After the first battery 101 is powered on, the normally open contact 1021 of the live display 102 closes, so that the first battery 101 supplies power to the uninterruptible power supply 104 through the live display 102 and the relay 103, and then starts the uninterruptible power supply 104; after starting, the uninterruptible power supply 104 supplies power to the relay protection device 105 to start the relay protection device 105.
[0053] At this point, by connecting to the normally open contacts in the live indicator, the normally open contacts in the live indicator can be closed after the line is energized, thereby connecting the relay protection device startup circuit, thus supplying power to the uninterruptible power supply to start the relay protection device, thereby avoiding the problem of excessive hardware cost caused by using voltage transformer cabinets in the busbar.
[0054] In one alternative implementation, such as Figure 2 As shown, the relay 103 in the start-up circuit of the relay protection device includes an energized coil 1031 and a normally closed contact 1032.
[0055] One end of the normally closed contact 1032 is connected to the other end of the live display 102; the other end of the normally closed contact 1032 is connected to the positive terminal of the uninterruptible power supply 104.
[0056] like Figure 2 As shown, when the live display includes a normally open contact 1021, one end of the normally closed contact 1032 is connected to the other end of the normally open contact 1021 in the live display 102.
[0057] The energizing coil 1031 is used to control the normally closed contact of the relay to open after the first battery 101 is energized, so that the first battery stops supplying power to the uninterruptible power supply.
[0058] In specific implementation, after the first battery 101 is powered on, the energizing coil 1031 can be powered. At this time, the energizing coil can generate a magnetic field, which will cause the normally closed contact of the relay to open. This will disconnect the relay protection device's starting circuit, thereby de-energizing the line and causing the normally open contact in the energized display 102 to open, thus achieving the purpose of stopping the first battery from supplying power to the uninterruptible power supply.
[0059] This implementation method can promptly stop supplying power to the uninterruptible power supply (UPS) after the UPS is started and the relay protection device is activated, thereby saving electricity.
[0060] In one possible implementation, Figure 2 The relay 103 shown indicates a time-delay relay. At this time, the time-delay relay 103 is used to delay disconnection after the first battery is powered on, thereby ensuring that the uninterruptible power supply can accurately start the relay protection device, and then stop the first battery from supplying power to the uninterruptible power supply.
[0061] In one example, the energizing coil can control the normally closed contact of the relay to open 10 seconds after the first battery is powered on, or it can control the normally closed contact of the relay to open 1 minute after the first battery is powered on. Here, the delay time for the energizing coil to control the normally closed contact to open is not limited, and it is determined by meeting the actual needs.
[0062] In one example, when relay 103 indicates a time-delay relay, the normally closed contact can be delayed to open by at least one of mechanical delay, electronic delay, and digital logic control delay methods.
[0063] In this case, when the delay is achieved according to the mechanical delay method, the time delay relay may also include a mechanical structure for delay (e.g., airbag damping, gear reduction structure, etc.) to achieve the delay triggering of normally closed contacts.
[0064] In cases where the delay is implemented using an electronic delay method, the time-delay relay may also include a time-delay sub-circuit (e.g., a charging / discharging circuit) for delaying the normally closed contact to achieve time-delay triggering.
[0065] In the case where the delay is achieved by controlling the delay method according to digital logic, the time delay relay may also include a microprocessor for delay, so that the microprocessor can perform timing and control the normally closed contact to open after the delay duration is reached.
[0066] Therefore, this application does not limit the type of time delay relay, but rather focuses on meeting actual needs.
[0067] Optionally, the time-delay relay can also be a relay reused in the switchgear of the wind turbine generator set. In this case, it can be delayed after the switchgear is powered on to ensure that the uninterruptible power supply can be powered by the first battery in the control cabinet at the bottom of the tower, thereby enabling the relay protection device to be started accurately.
[0068] This implementation method enables the delayed disconnection of the relay protection device's startup circuit through a time-delay relay, thereby ensuring that the uninterruptible power supply is disconnected only after it has successfully started.
[0069] In one alternative implementation, please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 3 At this time, the relay in the relay protection device's starting circuit can also indicate the protection relay. Figure 2 Based on the relay protection device startup circuit shown, the relay protection device startup circuit provided in this application will be further explained.
[0070] like Figure 3 As shown, relay 103 may include a time delay relay 11 and a protection relay 12.
[0071] In one example, the protective relay 12 can control the opening of its normally closed contact by detecting the energizing voltage of the circuit where the switching power supply is located in the control cabinet at the bottom of the tower. For example, when the energizing voltage of the circuit where the switching power supply is located is detected to meet a voltage threshold, the normally closed contact can be controlled to open, thereby stopping the first battery from supplying power to the uninterruptible power supply.
[0072] In another example, the protection relay 12 can also control the normally closed contact to open after detecting that the switching power supply is energized on the line and the voltage is stable. The specific implementation of the protection relay is not limited here, as long as it can be implemented.
[0073] This implementation method enables the protection relay to promptly disconnect the relay protection device's starting circuit in case the time delay relay fails to disconnect in time, thereby stopping the power supply to the uninterruptible power supply. This provides multiple protections and avoids the problem of having to manually disconnect the device when the time delay relay fails to disconnect in time during remote power supply.
[0074] Based on this, such as Figure 3 As shown, the protection relay 12 is connected to the circuit where the switching power supply 106 is located.
[0075] At this time, according to the graded power-on principle in the wind turbine generator set, the protection relay can be connected to the power supply line of the control cabinet at the bottom of the tower. This allows the difference between the power-on time of the switch cabinet in the wind turbine generator set and the power-on time of the control cabinet at the bottom of the tower to be determined as the delay disconnection time of the relay protection device's starting circuit. This allows the first power supply to stop supplying power to the uninterruptible power supply by disconnecting the normally closed contact in the protection relay.
[0076] Specifically, the protection relay 12 is used to supply power to the energized coil of the protection relay 12 after the switching power supply 106 is energized, so that the normally closed contacts included in the protection relay are opened according to the control of the energized coil, so that the first battery stops supplying power to the uninterruptible power supply.
[0077] In one possible implementation, the protection relay 12 can be connected not only to the circuit where the switching power supply 106 is located, but also to the circuit where any other equipment involved in the graded power-on principle is located. For example, it can also be connected to the circuit where the generator equipment is located. Here, the type of any other equipment is not limited, and the power-on time of any other equipment is later than the power-on time of the control cabinet at the bottom of the tower.
[0078] In the above embodiments, by connecting the protection relay to the circuit where the switching power supply is located, the protection relay can detect the voltage of the circuit where the switching power supply is located, thereby controlling the normally closed contact in the protection relay to open.
[0079] In an optional implementation, based on any of the above embodiments, the relay protection device start-up circuit provided in this application embodiment further includes a maintenance switch. In this case, the maintenance switch can disconnect the power supply line of the relay protection device start-up circuit through manual maintenance.
[0080] Based on this, please see Figure 4 , Figure 4 A schematic diagram of the structure of a relay protection device start-up circuit provided in this application embodiment. Figure 4 ,exist Figure 3 Based on the relay protection device startup circuit shown, the relay protection device startup circuit provided in this application will be further described. For example... Figure 4 As shown, the relay protection device start-up circuit also includes a maintenance switch 107.
[0081] One end of the maintenance switch 107 is connected in series with the relay 103; the other end of the maintenance switch 107 is connected in series with the positive terminal of the uninterruptible power supply 104.
[0082] Maintenance switch 107 is used to disconnect during manual maintenance so that the first battery 101 stops supplying power to the uninterruptible power supply 104.
[0083] In one embodiment, when manually maintaining the maintenance switch, the maintenance switch can be turned off by triggering a knob, or by toggling a switch, or by using a push-button switch. The manual maintenance method corresponding to the maintenance switch 107 is not limited here, as long as it can be implemented.
[0084] In one possible approach, the maintenance switch 107 can also be connected in series with an indicator light, so that after the maintenance switch 107 is manually disconnected, the indicator light will be illuminated to provide a clear and intuitive prompt to the staff, thereby ensuring the effectiveness and accuracy of the maintenance switch triggering.
[0085] This implementation method allows for manual maintenance to disconnect the relay protection device's starting circuit in an on-site maintenance environment, where the control cabinet at the base of the tower remains energized and the relays are not disconnected. This stops the first battery from supplying power to the uninterruptible power supply, thus meeting the needs of various scenarios and improving the performance of the relay protection device's starting circuit.
[0086] In one optional implementation, based on any of the above embodiments, the relay protection device startup circuit provided in this application embodiment further includes a second battery, thereby powering the energized display according to the second battery.
[0087] For example, such as Figure 4 As shown, the relay protection device start-up circuit includes a second battery 108, the two ends of which are connected to the two ends of the powered display 102 to supply power to the powered display 102.
[0088] In one example, the second battery can be a standalone battery or a solar panel to power the energized display 102. In this case, by using the second battery and the energized display to form a relay protection device startup circuit, the hardware cost is still reduced compared to adding a voltage transformer cabinet to the busbar.
[0089] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a tower base control cabinet provided in an embodiment of this application, as shown below. Figure 5 As shown, the control cabinet at the bottom of the tower includes the relay protection device start-up circuit of any of the above items.
[0090] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a wind turbine generator set provided in an embodiment of this application, as shown below. Figure 6 As shown, the wind turbine generator set includes the above-mentioned Figure 5 The control cabinet and switch cabinet at the bottom of the tower are shown.
[0091] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.
Claims
1. A relay protection device start-up circuit, characterized in that, The circuit includes at least: a first battery, a charged display, a relay, an uninterruptible power supply, and a relay protection device; wherein... The positive terminal of the first battery is connected to one end of the charged display, and the negative terminal of the first battery is connected to the negative terminal of the uninterruptible power supply. The other end of the energized display is connected to one end of the relay; the other end of the relay is connected to the positive terminal of the uninterruptible power supply. After the first battery is powered on, the uninterruptible power supply is powered through the energized display and the relay, and the relay protection device is activated according to the uninterruptible power supply.
2. The circuit according to claim 1, characterized in that, The energized display includes a normally open contact; one end of the normally open contact is connected to the positive terminal of the first battery; the other end of the normally open contact is connected to one end of the relay. After the first battery is powered on, the normally open contact of the live display closes, so that the first battery supplies power to the uninterruptible power supply through the live display and the relay, thereby starting the uninterruptible power supply. After startup, the uninterruptible power supply is used to supply power to the relay protection device in order to activate the relay protection device.
3. The circuit according to claim 1, characterized in that, The relay includes an energized coil and a normally closed contact; one end of the normally closed contact is connected to the other end of the energized display; the other end of the normally closed contact is connected to the positive terminal of the uninterruptible power supply. The energizing coil is used to control the normally closed contact of the relay to open after the first battery is powered on, so that the first battery stops supplying power to the uninterruptible power supply.
4. The circuit according to claim 3, characterized in that, The relay indicates a time-delay relay; the time-delay relay is used to disconnect after a delay following power-on of the first battery, so that the first battery stops supplying power to the uninterruptible power supply.
5. The circuit according to claim 3, characterized in that, The relay also indicates a protection relay.
6. The circuit according to claim 5, characterized in that, The protective relay is connected to the circuit where the switching power supply is located; The protection relay is used to supply power to the energized coil of the protection relay after the switching power supply line is energized, so as to control the normally closed contacts of the protection relay to open according to the energized coil, so as to stop the first battery from supplying power to the uninterruptible power supply.
7. The circuit according to any one of claims 1 to 6, characterized in that, The circuit also includes a maintenance switch; one end of the maintenance switch is connected in series with the relay; the other end of the maintenance switch is connected in series with the positive terminal of the uninterruptible power supply. The maintenance switch is used to disconnect during manual maintenance so that the first battery stops supplying power to the uninterruptible power supply.
8. The circuit according to any one of claims 1 to 6, characterized in that, The circuit also includes a second battery, the two ends of which are connected to the two ends of the charged display to supply power to the charged display.
9. A tower base control cabinet, characterized in that, The relay protection device start-up circuit includes any one of claims 1-8.
10. A wind turbine generator set, characterized in that, Includes the tower base control cabinet and switch cabinet as described in claim 9 above.