Fan graded starting circuit of new energy European box-type substation

Abstract

The utility model belongs to new energy European style box -type substation technical field provides a new energy European style box -type substation's fan grading start loop, including trigger module and execution module, the trigger module includes the temperature control loop and transformer body temperature control loop of cooling type, the execution module is fan grading start loop, trigger module's output and fan grading start loop's input connection. The utility model provides new energy European style box -type substation's fan grading start loop can effectively limit fan starting current, avoid control transformer and burn because of heavy load, prolong the life of equipment, need not increase transformer capacity, reduce investment and operating cost, promote the safe and economic operation of substation.

Description

Technical Field

[0001] This utility model belongs to the technical field of European-style box-type substations for new energy, specifically, it relates to a fan staged start-up circuit for a European-style box-type substation for new energy. Background Technology

[0002] In existing European-style prefabricated substations for new energy applications, the axial flow fan experiences excessive instantaneous current during startup. This phenomenon can severely impact circuit components, placing a heavy load on the control transformer and posing a significant risk of equipment burnout. Traditional solutions to this problem often involve increasing the capacity of the control transformer. While this alleviates the power shortage, it leads to a significant increase in costs, substantially increasing the economic burden of investment and operation. This severely restricts the effective control and optimization of costs while ensuring the safe and stable operation of the equipment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a staged starting circuit for wind turbines in a European-style prefabricated substation for new energy, thereby solving the problems of excessive instantaneous current and uneconomic efficiency during the start-up of axial flow wind turbines in existing European-style prefabricated substations for new energy.

[0004] The present invention adopts the following technical solution.

[0005] A wind turbine staged start-up circuit for a new energy European-style box-type substation includes a trigger module and an execution module. The trigger module includes a cooling-type temperature control circuit and a transformer body temperature control circuit. The execution module is a wind turbine staged start-up circuit. The output terminal of the trigger module is connected to the input terminal of the wind turbine staged start-up circuit.

[0006] The cooling-type temperature control loop includes an ambient temperature sensor, a cooling-type temperature controller, and a first intermediate relay. The signal output terminal of the ambient temperature sensor is connected to the signal input terminal of the cooling-type temperature controller. The power supply terminal of the cooling-type temperature controller is connected to a power source, and its output terminal is connected to the fan staged start-up loop through the first intermediate relay.

[0007] The transformer body temperature control circuit includes a winding temperature sensor, a transformer body temperature controller, and a time relay. The signal output terminal of the winding temperature sensor is connected to the signal input terminal of the transformer body temperature controller. The power supply terminal of the transformer body temperature controller is connected to a power source, and its output terminal is connected to the fan staged start circuit through the time relay.

[0008] The fan staged start circuit includes a first relay group and a second relay group. The time relay has an instantaneous normally open contact and a delayed normally open contact. The input terminal of the first relay group is connected to the instantaneous normally open contact, and the output terminal of the first relay group is connected to a group of fans. The input terminal of the second relay group is connected to the delayed normally open contact, and the output terminal of the second relay group is connected to another group of fans.

[0009] Furthermore, the cooling-type temperature controller is provided with a first power input terminal, a second power input terminal, and a signal input terminal. The second power input terminal is connected to the L line of the power supply, and the first power input terminal is connected to the N line of the power supply. The signal input terminal is connected to the output terminal of the ambient temperature sensor, and the first intermediate relay is connected in series in the signal output path of the signal input terminal.

[0010] Furthermore, the transformer body temperature controller is provided with a third power input terminal, a fourth power input terminal, a first signal output terminal, and a second signal output terminal. The fourth power input terminal is connected to the L line of the power supply, the third power input terminal is connected to the N line of the power supply, and the first and second signal output terminals are connected in series with the coil of the time relay.

[0011] Furthermore, in the fan staged start-up circuit, the first relay group is composed of the coils of the second and third intermediate relays connected in parallel; the second relay group is composed of the coils of the fourth and fifth intermediate relays connected in parallel.

[0012] The beneficial effects of this utility model are as follows: compared with the prior art, this utility model can effectively limit the starting current of the wind turbine, avoid the risk of the control transformer burning out due to excessive load, maintain its stable operation and extend its service life; in terms of cost control, the problem of excessive starting current can be solved without increasing the capacity of the control transformer, significantly reducing investment and operating costs and improving the economic benefits of the project; at the same time, by optimizing the wind turbine starting scheme, it promotes the reasonable optimization of costs and sustainable development of new energy European-style box-type substations under the premise of ensuring safe and stable operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the fan staged start-up circuit of the European-style box-type substation for new energy provided by this utility model.

[0014] In the diagram: 1-Cooling temperature control circuit; 2-Transformer body temperature control circuit; 3-Fan staged start circuit; 4-Signal input terminal; 5-First power input terminal; 6-Second power input terminal; 7-Third power input terminal; 8-Fourth power input terminal; 9-First signal output terminal; 10-Second signal output terminal; WK-Cooling temperature controller; WKY-Transformer body temperature controller; KA1-First intermediate relay; KA2-Second intermediate relay; KA3-Third intermediate relay; KA4-Fourth intermediate relay; KA5-Fifth intermediate relay; KT-Time relay; KT1-Instantaneous normally open contact; KT2-Delayed normally open contact. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The embodiments described in this application are merely some embodiments of this utility model, and not all embodiments. Based on the spirit of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figure 1 As shown, this utility model provides a wind turbine staged start-up circuit for a new energy European-style box-type substation, including a trigger module and an execution module. The trigger module includes a cooling-type temperature control circuit 1 and a transformer body temperature control circuit 2 arranged in parallel. The execution module is a wind turbine staged start-up circuit 3, and the output end of the trigger module is connected to the input end of the wind turbine staged start-up circuit 3.

[0017] The cooling-type temperature control loop 1 includes an ambient temperature sensor, a cooling-type temperature controller WK, a first intermediate relay KA1, and secondary wiring. The ambient temperature sensor measures the ambient temperature, and its signal output terminal is connected to the signal input terminal of the cooling-type temperature controller WK via secondary wiring. The power supply terminal of the cooling-type temperature controller WK is connected to a power source, and its output terminal is connected to the fan staged start-up loop 3 via the first intermediate relay KA1. Specifically, the cooling-type temperature controller WK includes a first power input terminal 5, a second power input terminal 6, and a signal input terminal 4. The second power input terminal 6 is connected to the L line of the power source, the first power input terminal 5 is connected to the N line of the power source, the signal input terminal 4 is connected to the output terminal of the ambient temperature sensor, and the first intermediate relay KA1 is connected in series in the signal output path of the signal input terminal 4.

[0018] The transformer body temperature control circuit 2 includes a winding temperature sensor, a transformer body temperature controller WKY, and a time relay KT. The signal output terminal of the winding temperature sensor is connected to the signal input terminal of the transformer body temperature controller WKY. The power supply terminal of the transformer body temperature controller WKY is connected to a power source, and its output terminal is connected to the fan staged start circuit 3 through the time relay KT. Specifically, the transformer body temperature controller WKY includes a third power input terminal 7, a fourth power input terminal 8, a first signal output terminal 9, and a second signal output terminal 10. The fourth power input terminal 8 is connected to the L line of the power source, the third power input terminal 7 is connected to the N line of the power source, and the first signal output terminal 9 and the second signal output terminal 10 are connected in series with the coil of the time relay KT.

[0019] The fan tiered start circuit 3 includes a first relay group and a second relay group. The time relay KT has an instantaneous normally open contact KT1 and a delayed normally open contact KT2. The first relay group consists of the coils of the second intermediate relay KA2 and the third intermediate relay KA3 connected in parallel, with its input connected to the instantaneous normally open contact KT1. The second relay group consists of the coils of the fourth intermediate relay KA4 and the fifth intermediate relay KA5 connected in parallel, with its input connected to the delayed normally open contact KT2. When the temperature controller outputs a signal to start the fans, the time relay immediately starts the group of fans connected to the first relay group, and after a certain period, starts the other group of fans connected to the second relay group, thus achieving the tiered start function. The start interval can be set according to the different start times of the fans.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A wind turbine staged starting circuit for a new energy European-style prefabricated substation, comprising a trigger module and an execution module, characterized in that: The trigger module includes a cooling temperature control circuit (1) and a transformer body temperature control circuit (2), and the execution module is a fan staged start circuit (3). The output end of the trigger module is connected to the input end of the fan staged start circuit (3). The cooling-type temperature control circuit (1) includes an ambient temperature sensor, a cooling-type temperature controller (WK) and a first intermediate relay. The signal output terminal of the ambient temperature sensor is connected to the signal input terminal of the cooling-type temperature controller (WK). The power supply terminal of the cooling-type temperature controller (WK) is connected to a power source, and its output terminal is connected to the fan staged start circuit (3) through the first intermediate relay (KA1). The transformer body temperature control circuit (2) includes a winding temperature sensor, a transformer body temperature controller (WKY) and a time relay (KT). The signal output terminal of the winding temperature sensor is connected to the signal input terminal of the transformer body temperature controller (WKY). The power supply terminal of the transformer body temperature controller (WKY) is connected to a power source, and its output terminal is connected to the fan staged start circuit (3) through the time relay (KT). The fan staged start circuit (3) includes a first relay group and a second relay group. The time relay (KT) has an instantaneous normally open contact (KT1) and a delayed normally open contact (KT2). The input terminal of the first relay group is connected to the instantaneous normally open contact (KT1), and the output terminal of the first relay group is connected to a group of fans. The input terminal of the second relay group is connected to the delayed normally open contact (KT2), ​​and the output terminal of the second relay group is connected to another group of fans.

2. The wind turbine staged start-up circuit of a new energy European-style box-type substation according to claim 1, characterized in that: The cooling temperature controller (WK) is provided with a first power input terminal (5), a second power input terminal (6) and a signal input terminal (4). The second power input terminal (6) is connected to the L line of the power supply, and the first power input terminal (5) is connected to the N line of the power supply. The signal input terminal (4) is connected to the output terminal of the ambient temperature sensor, and the first intermediate relay (KA1) is connected in series in the signal output path of the signal input terminal (4).

3. The wind turbine staged start-up circuit of a new energy European-style box-type substation according to claim 1, characterized in that: The transformer body temperature controller (WKY) is equipped with a third power input terminal (7), a fourth power input terminal (8), a first signal output terminal (9), and a second signal output terminal (10). The fourth power input terminal (8) is connected to the L line of the power supply, the third power input terminal (7) is connected to the N line of the power supply, and the first signal output terminal (9) and the second signal output terminal (10) are connected in series with the coil of the time relay (KT).

4. The wind turbine staged start-up circuit of a new energy European-style box-type substation according to claim 1, characterized in that: In the fan staged start circuit (3), the first relay group is composed of the coils of the second intermediate relay (KA2) and the third intermediate relay (KA3) connected in parallel; the second relay group is composed of the coils of the fourth intermediate relay (KA4) and the fifth intermediate relay (KA5) connected in parallel.

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