CN212454681U

CN212454681U - Safety device of large megawatt fan

Info

Publication number: CN212454681U
Application number: CN202021022607.7U
Authority: CN
Inventors: 程里伏; 邓建浩
Original assignee: Jiangyin Hongyuan New Energy Technology Co ltd
Current assignee: Jiangsu Naquan Hongyuan New Energy Technology Co ltd
Priority date: 2020-06-07
Filing date: 2020-06-07
Publication date: 2021-02-02
Anticipated expiration: 2030-06-07

Abstract

The utility model discloses a safety device of big megawatt fan, become oar cabinet and third and become oar cabinet including programmable controller, safety relay, first oar cabinet, second, programmable controller becomes oar cabinet and third respectively through a safety relay and first oar cabinet, second and become oar cabinet and third and become oar cabinet electricity and be connected, among this safety device of big megawatt fan, safety relay has the contact and has the function of autonomy, has added the device function of autonomy moreover, has improved this safety device's reliability.

Description

Safety device of large megawatt fan

Technical Field

The utility model relates to a fan technical field, concretely relates to safety device of big megawatt fan.

Background

In recent years, with the continuous development of wind power generation, the installed capacity of a wind power plant is continuously increased, and the performance of the industry on wind turbine generators is higher and higher.

The safety of the wind turbine generator is placed on the first place, when a wind power generation main control system breaks down, a control loop in a generator hub controls a variable pitch motor, and blades are driven to rotate to a feathering position through a variable pitch reduction box. At present, a common relay is used in a variable pitch system, a safety chain is generated to generate a linkage fault to disconnect a relay coil, and a contact signal is fed back to the input end of a driver. However, in the operation process of the wind turbine generator, the phenomenon of contact fusion of the relay occurs, so that the interlocking safety fault can be caused, and the safety protection effect cannot be realized, so that the serious safety accident of the fan is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a overcome foretell not enough, provide a safety device of big megawatt fan.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a safety device of a large megawatt fan comprises a programmable controller, a safety relay, a first pitch control cabinet, a second pitch control cabinet and a third pitch control cabinet, wherein the programmable controller is electrically connected with the first pitch control cabinet, the second pitch control cabinet and the third pitch control cabinet through the safety relay respectively.

Preferably, the safety relay is provided with two fault signal input ends and one reset signal input end, wherein the fault signal input end is connected with a switch of the first relay, the switch of the first relay is controlled by the programmable controller, a coil of the first relay is positioned in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the coil of the first relay is connected with a fault acquisition module in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the other fault input end is connected with a switch of the second relay and a switch of the third relay, the switch of the second relay and the switch of the third relay are controlled by a master controller in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the reset signal input end is connected with the reset switch, and the signal output end of the safety relay is electrically connected with the programmable controller.

The safety relay is a necessary control part in a safety loop, receives safety input, and outputs a switch signal to a control loop of equipment in a deterministic manner through judgment of an internal loop. In short, the safety relays are of a double-channel signal type, and the safety relays can normally work only when the signals of the two channels are normal; in the working process, as long as any one channel signal is disconnected, the safety relay stops outputting until the two channel signals are normal and can not normally work after being reset. The safety relay contacts open when a fault occurs.

Preferably, the model number of the programmable controller is S7-200.

Preferably, the master controller is a single chip microcomputer, and the model of the single chip microcomputer is STM32FRBT 6.

The utility model has the advantages that: in the safety device of the large megawatt fan, the safety relay has a contact self-testing function, and the device self-testing function is added, so that the reliability of the safety device is improved.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is an electrical schematic diagram of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the switch of the first relay in the first pitch control cabinet is 1KA1-1, the coil of the first relay is 1KA1-2, the switch of the second relay is 1KA2, and the switch of the third relay is 1KA 3; the switch of a first relay in the second variable pitch cabinet is 2KA1-1, the coil of the first relay is 2KA1-2, the switch of a second relay is 2KA2, and the switch of a third relay is 2KA 3; the switch of the first relay in the third variable pitch cabinet is 3KA1-1, the coil of the first relay is 3KA1-2, the switch of the second relay is 3KA2, and the switch of the third relay is 3KA3

The safety relay is provided with two fault signal input ends and one reset signal input end, wherein the fault signal input end of one path is connected with a switch of a first relay, the switch of the first relay is controlled by a programmable controller, a coil of the first relay is positioned in a first pitch control cabinet, a second pitch control cabinet or a third pitch control cabinet, the coil of the first relay is connected with a fault acquisition module in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the other fault input end of the first relay is connected with a switch of a second relay and a switch of a third relay, the switch of the second relay and the switch of the third relay are controlled by a master controller in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the reset signal input end is connected with a reset switch, and a signal output end of the safety relay is electrically connected with the programmable controller.

The safety relay is connected with two safety chains, two safety chains are arranged between the programmable logic controller and each variable pitch cabinet, the two safety chains are subjected to signal acquisition by the safety relay, and then the signals are sent to the programmable logic controller by the signal output end of the safety relay.

After the programmable controller is self-checked and has no fault, a first relay switch of a first pitch variation cabinet is closed, the safety relay receives a fault-free signal of the programmable controller, meanwhile, a coil of the first relay receives the signal through a fault acquisition module in the first pitch variation cabinet, after the fault-free state is judged, the first pitch variation cabinet is self-checked, after the fault-free state is judged, a corresponding second relay and a corresponding third relay are closed, the safety relay receives the fault-free signal of the first pitch variation cabinet, and then an instruction is sent to the programmable controller to determine that the first pitch variation cabinet and the programmable controller have no fault; similarly, the safety self-checking principle of the second variable pitch cabinet and the third variable pitch cabinet is the same as the principle.

In this example: the model number of the programmable controller is S7-200.

In this example: the main controller is a single chip microcomputer, and the model of the single chip microcomputer is STM32FRBT 6.

In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A safety device of a large megawatt fan is characterized in that: the variable-pitch control system comprises a programmable controller, a safety relay, a first variable-pitch cabinet, a second variable-pitch cabinet and a third variable-pitch cabinet, wherein the programmable controller is electrically connected with the first variable-pitch cabinet, the second variable-pitch cabinet and the third variable-pitch cabinet through the safety relay respectively.

2. The safety device for a large megawatt wind turbine as claimed in claim 1, wherein: the safety relay is provided with two fault signal input ends and one reset signal input end, wherein the fault signal input end of one path is connected with a switch of a first relay, the switch of the first relay is controlled by a programmable controller, a coil of the first relay is positioned in a first pitch control cabinet, a second pitch control cabinet or a third pitch control cabinet, the coil of the first relay is connected with a fault acquisition module in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the other fault input end of the first relay is connected with a switch of a second relay and a switch of a third relay, the switch of the second relay and the switch of the third relay are controlled by a master controller in the first pitch control cabinet, the second pitch control cabinet or the third pitch control cabinet, the reset signal input end is connected with a reset switch, and a signal output end of the safety relay is electrically connected with the programmable controller.

3. The safety device for a large megawatt wind turbine as claimed in claim 1, wherein: the model number of the programmable controller is S7-200.

4. The safety device for a large megawatt wind turbine as claimed in claim 2, wherein: the main controller is a single chip microcomputer, and the model of the single chip microcomputer is STM32FRBT 6.