A wind turbine safety chain dual power supply independent power supply structure

Abstract

The utility model discloses a kind of wind generating set safety chain dual-power independent power supply structure, including safety chain independent power supply circuit, redundancy module, redundancy power supply circuit, multiple power supply protection circuit and multiple other power supply protection circuit, the safety chain independent power supply circuit is connected with multiple power supply protection circuit for accessing safety chain signal by redundancy module, and safety chain independent power supply circuit is connected with redundancy power supply circuit by redundancy module, the redundancy power supply circuit is connected with multiple other power supply protection circuit, multiple other power supply protection circuit is connected with the other electrical equipment of wind generating set respectively, redundancy module makes safety chain independent power supply circuit and redundancy power supply circuit do redundancy power supply, to realize dual-power supply. The utility model can effectively improve the stability and reliability of safety chain power supply circuit, reduce safety chain due to power supply source unstable or unreliable etc. leading to safety chain failure problem, protect unit safety.

Description

Technical Field

[0001] This utility model relates to the technical field of wind power generation, and in particular to a dual-power independent power supply structure for a wind turbine generator set safety chain. Background Technology

[0002] The safety chain of a wind turbine generator set is a hardware circuit independent of the wind power generation control system. Even if the control system fails, it can still trigger an emergency shutdown, ensuring the unit stops operating immediately under extreme fault conditions (such as overspeed or mechanical overload). Currently, the safety chain circuit and equipment power supply of wind turbine generator sets basically share a switching power supply + UPS with other non-safety chain equipment. The safety chain circuit is not independently powered by other equipment; other equipment within the wind turbine generator set constitutes a significant portion of the system. If other equipment fails, the power supply circuit protection switch will trip, causing the safety chain circuit to lose power simultaneously. Alternatively, if the shared switching power supply + UPS power supply circuit fails, the safety chain and other equipment will lose power simultaneously, leading to safety chain failure. However, during normal operation of wind turbine generator sets, switching power supply or UPS power supply failures occur frequently. Therefore, to improve the reliability of the 24VDC power supply system, a redundant design for the wind turbine generator set electrical main control panel, as disclosed in CN212412763U, is proposed. This design allows the electrical main control panel to continue operating normally even if one power supply line fails or is lost, preventing unit shutdown or other unit failures and increasing unit power generation. However, the redundant power supply line disclosed in CN212412763U only provides two independent sets of switching power supplies, UPS, and batteries to meet the power supply capacity of all 24VDC equipment in the entire machine. The application cost of this solution is relatively high, and it does not address the separation of the safety chain circuit from the power supply circuits of other equipment, nor does it resolve the impact of other equipment failures on the safety chain power supply circuit. Once a failure of other equipment causes the upper terminal block protection switch to trip, the safety chain power supply circuit connected to that terminal block will also fail simultaneously, resulting in the failure of the safety chain protection or power outage and shutdown. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a dual-power independent power supply structure for the safety chain of a wind turbine generator set. This structure can effectively improve the stability and reliability of the safety chain power supply circuit, reduce the safety chain failure caused by unstable or unreliable power supply, and protect the safety of the generator set.

[0004] The objective of this utility model can be achieved by adopting the following technical solutions:

[0005] A dual-power independent power supply structure for a wind turbine generator set safety chain includes an independent power supply circuit for the safety chain, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The independent power supply circuit for the safety chain is connected to multiple power supply protection circuits for accessing safety chain signals via the redundant module, and the independent power supply circuit for the safety chain is connected to the redundant power supply circuit via the redundant module. The redundant power supply circuit is connected to multiple other power supply protection circuits, which are respectively connected to other electrical equipment of the wind turbine generator set. The redundant module enables the independent power supply circuit for the safety chain and the redundant power supply circuits to provide redundant power supply, thereby realizing dual-power supply.

[0006] Furthermore, the independent power supply circuit of the safety chain includes a protection switch F6, an AC UPS power supply G3, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and one end of the AC UPS power supply G3 is connected to the other end of the protection switch F6 and the battery G5, respectively. Its other end is connected to a redundancy module.

[0007] Furthermore, the independent power supply circuit of the safety chain includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 and the battery G5 are respectively connected to one end of the DC UPS power supply G8, and the other end of the DC UPS power supply G8 is connected to a redundancy module.

[0008] Furthermore, the power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundancy module, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the signal of the safety chain.

[0009] Furthermore, the other power supply protection circuit includes a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment of the wind turbine generator set.

[0010] Furthermore, the redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and multiple other power supply protection circuits.

[0011] A dual-power independent power supply structure for a wind turbine generator set safety chain includes an independent power supply circuit for the safety chain, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The independent power supply circuit for the safety chain is connected to the redundant power supply circuit via the redundant module, and the independent power supply circuit for the safety chain is connected to multiple power supply protection circuits for accessing safety chain signals. The redundant power supply circuit is connected to multiple other power supply protection circuits, which are respectively connected to other electrical equipment of the wind turbine generator set. The redundant module enables the independent power supply circuit for the safety chain and the redundant power supply circuits to provide redundant power supply, thereby realizing dual-power supply.

[0012] Furthermore, the independent power supply circuit of the safety chain includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 is connected to a redundancy module. The redundancy module and the battery G5 are respectively connected to one end of the DC UPS power supply G8. The other end of the DC UPS power supply G8 is connected to multiple power supply protection circuits.

[0013] Furthermore, the power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundant module, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the signal of the safety chain. The other power supply protection circuit includes a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment of the wind turbine generator set.

[0014] Furthermore, the redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and multiple other power supply protection circuits.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] 1. The dual-power independent power supply structure of the safety chain of this utility model enables the safety chain circuit and equipment to be powered independently of other equipment, avoiding the failure of the safety chain power supply due to the failure of other equipment; at the same time, according to the safety chain signal type and reliability level, the safety chain signal is distributed to different terminals, further improving the reliability of the safety chain power supply.

[0017] 2. This utility model adds a redundant configuration to the switching power supply, giving the safety chain a dual power supply circuit. Even if one power supply circuit fails, the safety chain circuit can still be reliably powered, improving the reliability of the power supply circuit and greatly reducing the risk of safety chain failure due to unstable or unreliable power supply. This ensures the reliable operation of the safety chain and improves the safety of the wind turbine generator. It also reduces the likelihood of generator shutdown due to safety chain power failure, thus reducing power generation loss. Attached Figure Description

[0018] Figure 1 The circuit diagram shows the safety chain dual-power independent power supply structure of Example 1.

[0019] Figure 2 The circuit diagram shows the safety chain dual-power independent power supply structure of Example 2.

[0020] Figure 3 The circuit diagram shows the safety chain dual-power independent power supply structure of Example 3. Detailed Implementation

[0021] 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 some embodiments of this utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0022] Example 1:

[0023] like Figure 1 As shown, this embodiment provides a dual-power independent power supply structure for a wind turbine generator set safety chain, including an independent power supply circuit for the safety chain, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The independent power supply circuit for the safety chain is connected to multiple power supply protection circuits through the redundant module, and the independent power supply circuit for the safety chain is connected to the redundant power supply circuit through the redundant module. The signal of the safety chain is connected to different power supply protection circuits according to the signal type and reliability level. The redundant power supply circuit is connected to multiple other power supply protection circuits, and the multiple other power supply protection circuits are respectively connected to other electrical equipment of the wind turbine generator set. The redundant module enables the independent power supply circuit for the safety chain and the redundant power supply circuit to provide redundant power supply, thereby realizing dual-power supply.

[0024] The safety chain independent power supply circuit includes a protection switch F6, an AC UPS power supply G3, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply. One end of the AC UPS power supply G3 is connected to the other end of the protection switch F6 and the battery G5, and the other end of the UPS power supply G3 is connected to the redundancy module G4.

[0025] The power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundant module, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the safety chain signal. In this embodiment, three power supply protection circuits are set up, namely protection switch F7 and terminal block XP1, protection switch F8 and terminal block XP2, and protection switch F9 and terminal block XP3. Safety relays, vibration over-limit alarms, speed over-limit alarms, cable twisting switches and cable twisting over-limit alarms, pitch EFC alarms, emergency stop buttons, unit maintenance buttons, and nacelle safety chain reset buttons are connected to the first power supply protection circuit, that is, to terminal block XP1 under protection switch F7. Vibration sensors, impeller and generator speed sensors, speed monitoring relays, and cable twisting switch power supplies are connected to the second power supply protection circuit, that is, to terminal block XP2 under protection switch F8. Pitch 24VDC power supply, high-speed shaft brake power supply, and other power supplies related to the safety chain are connected to the third power supply protection circuit, that is, to terminal block XP3 under protection switch F9.

[0026] Other power supply protection circuits include a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment. In this embodiment, at least four other power supply protection circuits are provided, namely, protection switch F2 and terminal block XP4, protection switch F3 and terminal block XP5, protection switch F4 and terminal block XP6, and protection switch F5 and terminal block XP7.

[0027] The redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module G4 and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and several other power supply protection circuits.

[0028] Example 2:

[0029] like Figure 2As shown, this embodiment provides a dual-power independent power supply structure for the safety chain of a wind turbine generator set. The difference between this embodiment and Embodiment 1 is that the independent power supply circuit of the safety chain includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 and the battery G5 are respectively connected to one end of the DC UPS power supply G8. The other end of the DC UPS power supply G8 is connected to the redundancy module G4.

[0030] Example 3:

[0031] like Figure 3 As shown, this embodiment provides a dual-power independent power supply structure for a wind turbine generator set safety chain, including an independent power supply circuit for the safety chain, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The independent power supply circuit for the safety chain is connected to the redundant power supply circuit through the redundant module, and the independent power supply circuit for the safety chain is connected to multiple power supply protection circuits. The signals of the safety chain are connected to different power supply protection circuits according to the signal type and reliability level. The redundant power supply circuit is connected to multiple other power supply protection circuits, and the multiple other power supply protection circuits are connected to other electrical equipment of the wind turbine generator set. The redundant module enables the independent power supply circuit for the safety chain and the redundant power supply circuit to provide redundant power supply, thereby realizing dual-power supply.

[0032] The safety chain independent power supply circuit includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 is connected to a redundancy module G4. The redundancy module G4 and the battery G5 are each connected to one end of the DC UPS power supply G8. The other end of the DC UPS power supply G8 is connected to multiple power supply protection circuits.

[0033] The power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundant module G4, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the safety chain signal. In this embodiment, three power supply protection circuits are set up, namely protection switch F7 and terminal block XP1, protection switch F8 and terminal block XP2, and protection switch F9 and terminal block XP3. Safety relays, vibration over-limit alarms, speed over-limit alarms, cable twisting switches and cable twisting over-limit alarms, pitch EFC alarms, emergency stop buttons, unit maintenance buttons, and nacelle safety chain reset buttons are connected to the first power supply protection circuit, that is, to terminal block XP1 under protection switch F7. Vibration sensors, impeller and generator speed sensors, speed monitoring relays, and cable twisting switch power supplies are connected to the second power supply protection circuit, that is, to terminal block XP2 under protection switch F8. Pitch 24VDC power supply, high-speed shaft brake power supply, and other power supplies related to the safety chain are connected to the third power supply protection circuit, that is, to terminal block XP3 under protection switch F9.

[0034] Other power supply protection circuits include a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment of the wind turbine generator set. In this embodiment, at least four other power supply protection circuits are provided, namely, protection switch F2 and terminal block XP4, protection switch F3 and terminal block XP5, protection switch F4 and terminal block XP6, and protection switch F5 and terminal block XP7.

[0035] The redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module G4 and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and several other power supply protection circuits.

[0036] The safety chain circuit and equipment of this utility model are powered independently of other equipment, and the redundant configuration of the switching power supply is increased. The capacity of the switching power supply only needs to consider the power supply capacity of the safety chain circuit, which improves the stability and reliability of the safety chain power supply circuit, reduces the problem of safety chain failure due to unstable or unreliable power supply, protects the safety of the unit, and reduces the situation of unit failure and shutdown due to safety chain power failure, thus reducing the loss of power generation.

[0037] The above description is only a preferred embodiment of this utility model patent, but the protection scope of this utility model patent is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed in this utility model patent, based on the technical solution and utility model patent concept of this utility model patent, shall fall within the protection scope of this utility model patent.

Claims

1. A dual-power independent power supply structure for a wind turbine generator set safety chain, characterized in that: It includes an independent power supply circuit for the safety chain, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The independent power supply circuit for the safety chain is connected to multiple power supply protection circuits for accessing the safety chain signal through the redundant module, and the independent power supply circuit for the safety chain is connected to the redundant power supply circuit through the redundant module. The redundant power supply circuit is connected to multiple other power supply protection circuits, which are respectively connected to other electrical equipment of the wind turbine generator set. The redundant module enables the independent power supply circuit for the safety chain and the redundant power supply circuit to provide redundant power supply, thereby realizing dual power supply.

2. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 1, characterized in that: The independent power supply circuit of the safety chain includes a protection switch F6, an AC UPS power supply G3, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and one end of the AC UPS power supply G3 is connected to the other end of the protection switch F6 and the battery G5, respectively. Its other end is connected to a redundancy module.

3. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 1, characterized in that: The independent power supply circuit of the safety chain includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 and the battery G5 are respectively connected to one end of the DC UPS power supply G8. The other end of the DC UPS power supply G8 is connected to a redundancy module.

4. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 1, characterized in that: The power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundancy module, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the signal of the safety chain.

5. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 1, characterized in that: The other power supply protection circuit includes a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment of the wind turbine generator set.

6. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 1, characterized in that: The redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and multiple other power supply protection circuits.

7. A dual-power independent power supply structure for a wind turbine generator set safety chain, characterized in that: It includes a safety chain independent power supply circuit, a redundant module, a redundant power supply circuit, multiple power supply protection circuits, and multiple other power supply protection circuits. The safety chain independent power supply circuit is connected to the redundant power supply circuit through the redundant module, and the safety chain independent power supply circuit is connected to multiple power supply protection circuits for accessing safety chain signals. The redundant power supply circuit is connected to multiple other power supply protection circuits, which are respectively connected to other electrical equipment of the wind turbine generator set. The redundant module enables the safety chain independent power supply circuit and the redundant power supply circuit to provide redundant power supply, thereby realizing dual power supply.

8. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 7, characterized in that: The independent power supply circuit of the safety chain includes a protection switch F6, a switching power supply G7, a DC UPS power supply G8, and a battery G5. One end of the protection switch F6 is connected to a 400VAC AC power supply, and the other end is connected to one end of the switching power supply G7. The other end of the switching power supply G7 is connected to a redundancy module. The redundancy module and the battery G5 are respectively connected to one end of the DC UPS power supply G8. The other end of the DC UPS power supply G8 is connected to multiple power supply protection circuits.

9. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 7, characterized in that: The power supply protection circuit includes a first protection switch and a first terminal block. One end of the first protection switch is connected to the redundant module, and the other end is connected to the first terminal block. The other end of the first terminal block is connected to the signal of the safety chain. The other power supply protection circuit includes a second protection switch and a second terminal block. One end of the second protection switch is connected to the redundant power supply circuit, and the other end is connected to the second terminal block. The other end of the second terminal block is connected to other electrical equipment of the wind turbine generator set.

10. The wind turbine generator set safety chain dual-power independent power supply structure according to claim 7, characterized in that: The redundant power supply circuit includes a protection switch F1, a switching power supply G1, a DC UPS power supply G2, and a battery G6. One end of the protection switch F1 is connected to a 400VAC AC power supply, and the other end of the protection switch F1 is connected to one end of the switching power supply G1. The other end of the switching power supply G1 is connected to the redundant module and one end of the DC UPS power supply G2, respectively. The other end of the DC UPS power supply G2 is connected to the battery and multiple other power supply protection circuits.

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