Offshore wind turbine generator system power supply system automatic control device

Abstract

An offshore wind turbine power supply system automatic control device, including sub-control PLC, intermediate relay module, UPS system, circuit breaker automatic switching device, remote communication module, the remote communication module is electrically connected with sub-control PLC, and the remote communication module is accessed wind turbine ring network switch, and is formed with wind turbine main control PLC dual PLC redundancy architecture;The intermediate relay module is connected in series in the power supply loop of wind turbine main control PLC, and the electromagnetic control part of intermediate relay module is electrically connected with the output end of sub-control PLC;The output end of the UPS system is electrically connected with sub-control PLC, intermediate relay module, remote communication module respectively, and the UPS system is connected with the standby power supply end of wind turbine main control PLC;The circuit breaker automatic switching device is linked with wind turbine loop air gap, and the electromagnetic drive part of the circuit breaker automatic switching device is electrically connected with the output end of sub-control PLC.The utility model discloses through redundancy design, remote control mechanism and monitoring protection function, promotes wind turbine power supply reliability and operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to an automatic control device for the power supply system of offshore wind turbines. Background Technology

[0002] As offshore wind turbines expand from nearshore to offshore areas, their installed capacity is constantly increasing, placing increasingly higher demands on the reliability of power supply. Traditional power supply technologies can no longer meet the development needs of deep-sea wind turbines. For example, a wind farm in Fujian province experienced a sudden communication outage for one of its turbines. Due to the large turbine capacity and high wind speeds at sea, it was necessary to restore communication to monitor various operational information and ensure stable operation. However, the weather and sea conditions were poor at the time, making it impossible to dispatch maintenance vessels and helicopters to the site for maintenance, which hindered the rapid restoration of communication.

[0003] Existing wind turbine power supply systems suffer from the following defects: First, when the main control PLC crashes or malfunctions, there is a lack of a remote restart mechanism, requiring on-site maintenance to restore communication, severely impacting the continuity of turbine operation. Second, after a critical circuit breaker trips, it cannot be remotely reset and reconnected, requiring waiting for a suitable maintenance window, thus extending turbine downtime. Third, the power supply system lacks redundancy design; a single component failure can easily trigger a complete power outage, resulting in insufficient reliability. Fourth, some control circuits lack temperature and voltage monitoring and protection mechanisms, making them susceptible to damage due to overheating or voltage anomalies in harsh environments. These defects make it difficult to guarantee the power supply stability and ease of maintenance for deep-sea wind turbines under special operating conditions, hindering the efficient development of offshore wind power. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic control device for the power supply system of offshore wind turbines, which improves the power supply reliability and operation and maintenance convenience of wind turbines through redundant design, remote control mechanism and monitoring and protection functions.

[0005] To solve the above problems, the technical solution of this utility model is as follows: An automatic control device for an offshore wind turbine power supply system includes a sub-control PLC, an intermediate relay module, a UPS system, an automatic circuit breaker switching device, and a remote communication module. The remote communication module is electrically connected to the sub-control PLC and is connected to the wind turbine ring network switch, forming a dual-PLC redundancy architecture with the wind turbine main control PLC. The intermediate relay module is connected in series in the power supply circuit of the wind turbine main control PLC, and its electromagnetic control unit is electrically connected to the output terminal of the sub-control PLC. The output terminal of the UPS system is electrically connected to the sub-control PLC, the intermediate relay module, and the remote communication module, respectively, and the UPS system is connected to the backup power supply terminal of the wind turbine main control PLC. The automatic circuit breaker switching device is linked to the circuit breaker of the wind turbine circuit, and its electromagnetic drive unit is electrically connected to the output terminal of the sub-control PLC.

[0006] Furthermore, it also includes a temperature sensor and a voltage acquisition device. The temperature sensor is installed in the installation area of ​​the converter and the pitch controller, and the temperature sensor is electrically connected to the input terminal of the sub-control PLC. The voltage acquisition device is connected to the main power supply circuit of the wind turbine and the output terminal of the UPS system, and the voltage acquisition device is electrically connected to the input terminal of the sub-control PLC.

[0007] Furthermore, it also includes a three-phase electromagnetic switch device, wherein the three-phase switching part of the three-phase electromagnetic switch device is connected in series in the load power supply branch circuit of the main transformer and the main frequency converter of the wind turbine, and the electromagnetic control part of the three-phase electromagnetic switch device is electrically connected to the output terminal of the sub-control PLC.

[0008] Furthermore, it also includes an over-temperature protection control circuit, which includes a first temperature control switch, a second temperature control switch, and an over-temperature protection control relay. The first temperature control switch is installed in the converter braking unit, and the second temperature control switch is installed in the braking resistor. The normally closed contacts of the first and second temperature control switches are connected in series with the coil of the over-temperature protection control relay and connected to the DC power supply circuit. The normally open contact of the over-temperature protection control relay is connected to the digital input port of the sub-control PLC.

[0009] Furthermore, the automatic circuit breaker opening and closing device includes an electromagnetic drive unit and a mechanical actuator unit. The mechanical actuator unit is linked with the operating mechanism of the corresponding circuit breaker. The electromagnetic drive unit is electrically connected to the output terminal of the sub-control PLC. Each critical circuit circuit breaker is equipped with an independent automatic circuit breaker opening and closing device.

[0010] Furthermore, the input terminal of the UPS system is connected to the main power supply circuit of the wind turbine, and the UPS system is connected to the backup power supply terminal of the wind turbine main control PLC through a redundant power supply branch, thereby realizing dual power supply for the main control PLC.

[0011] Furthermore, the remote communication module is connected to the sub-control PLC via Ethernet, and the remote communication module is connected to the wind turbine ring network switch to realize remote communication between the central control computer and the sub-control PLC.

[0012] Furthermore, at least three temperature sensors are provided, respectively installed in the converter chamber, the pitch controller chamber, and the UPS system installation chamber; at least two voltage acquisition devices are provided, respectively acquiring the three-phase voltage of the main power supply circuit and the output voltage of the UPS system.

[0013] The beneficial effects of this utility model are as follows: 1. Adopting a dual PLC redundant control architecture, when the main PLC fails, the sub-control PLC can remotely power off and restart, quickly restore the unit's communication, eliminate the need for on-site maintenance, and improve the stable operation capability of deep-sea wind turbines under special working conditions.

[0014] 2. The key circuit circuit breaker is equipped with an automatic opening and closing device, which can remotely close the circuit in case of random tripping, reduce unit downtime, facilitate centralized maintenance during the operation and maintenance window, and improve unit operating efficiency.

[0015] 3. The UPS system provides redundant power supply for the core control components and main PLC, avoiding control failures caused by power outages in the main power supply circuit, ensuring uninterrupted system operation, and improving power supply reliability.

[0016] 4. It integrates temperature and voltage monitoring functions and an over-temperature control circuit, which can monitor the operating environment and power supply status of key equipment in real time, trigger the protection mechanism in a timely manner, avoid equipment damage due to over-temperature or voltage abnormalities, and extend the service life of the equipment.

[0017] 5. The three-phase electromagnetic switch device can cut off non-essential loads as needed, reduce UPS system power consumption, extend its runtime, and meet the data collection and operation monitoring needs of deep-sea wind turbine units during long-term standby.

[0018] 6. The device is independent of the wind turbine main control system, making it easy to modify. It does not affect the normal operation of the original system and shares a communication link with the main control system, eliminating the need to lay additional communication lines and reducing modification costs. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the device of this utility model. Figure 2 This is a schematic diagram of the remote restart control of the main PLC of this utility model. Figure 3 This is a schematic diagram of the redundant power supply branch of this utility model.

[0020] In the diagram: 1. Sub-control PLC; 2. Remote communication module; 3. Intermediate relay module; 4. UPS system; 5. Circuit breaker automatic opening and closing device; 6. Temperature sensor; 7. Voltage acquisition device; 8. Three-phase electromagnetic switch device; 9. Over-temperature protection control circuit; 10. Fan main control PLC; 11. Ring network switch; 12. Central control computer; 13. Circuit breaker; 14. UPS battery; 15. Main power supply circuit; 16. Input circuit breaker; 17. Main control PLC backup power supply terminal; 18. Output circuit breaker; 19. Redundant power supply branch. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 3 As shown, an automatic control device for an offshore wind turbine power supply system includes a sub-control PLC 1, an intermediate relay module 3, a UPS system 4, an automatic circuit breaker switching device 5, and a remote communication module 2. The remote communication module 2 is electrically connected to the sub-control PLC 1, and is connected to the wind turbine ring network switch 11, forming a dual PLC redundancy architecture with the wind turbine main control PLC. The intermediate relay module 3 is connected in series in the power supply circuit of the wind turbine main control PLC, and the electromagnetic control unit of the intermediate relay module 3 is connected to the sub-control PLC. The output terminal of 1 is electrically connected; the output terminal of the UPS system 4 is electrically connected to the sub-control PLC 1, the intermediate relay module 3, and the remote communication module 2 respectively, and the UPS system 4 is connected to the backup power supply terminal 17 of the wind turbine main control PLC; the circuit breaker automatic opening and closing device 5 is linked with the wind turbine circuit breaker 13, and the electromagnetic drive part of the circuit breaker automatic opening and closing device 5 is electrically connected to the output terminal of the sub-control PLC 1. The circuit breaker 13 includes the converter controller circuit breaker, the safety chain circuit breaker, the pitch controller circuit breaker, and the water-cooled heat pump circuit breaker.

[0023] Furthermore, it also includes a temperature sensor 6 and a voltage acquisition device 7. The temperature sensor 6 is installed in the installation area of ​​the converter and the pitch controller, and the temperature sensor 6 is electrically connected to the input terminal of the sub-control PLC1. The voltage acquisition device 7 is connected to the main power supply circuit 15 of the wind turbine and the output terminal of the UPS system 4, and the voltage acquisition device 7 is electrically connected to the input terminal of the sub-control PLC1.

[0024] Furthermore, it also includes a three-phase electromagnetic switch device 8, the three-phase switch section of which is connected in series in the load power supply branch circuit of the main transformer and the main frequency converter of the wind turbine, and the electromagnetic control section of which is electrically connected to the output terminal of the sub-control PLC1.

[0025] Furthermore, it also includes an over-temperature protection control circuit 9, which includes a first temperature control switch, a second temperature control switch, and an over-temperature protection control relay. The first temperature control switch is installed in the converter braking unit, and the second temperature control switch is installed in the braking resistor. The normally closed contacts of the first and second temperature control switches are connected in series with the coil of the over-temperature protection control relay and connected to the DC power supply circuit. The normally open contact of the over-temperature protection control relay is connected to the digital input port of the sub-control PLC1.

[0026] Furthermore, the automatic circuit breaker opening and closing device 5 includes an electromagnetic drive unit and a mechanical actuator unit. The mechanical actuator unit is linked with the operating mechanism of the corresponding circuit breaker. The electromagnetic drive unit is electrically connected to the output terminal of the sub-control PLC1. Each critical circuit circuit breaker 13 is equipped with an independent automatic circuit breaker opening and closing device 5.

[0027] Furthermore, the input terminal of the UPS system 4 is connected to the main power supply circuit 15 of the wind turbine, and the UPS system 4 is connected to the backup power supply terminal 17 of the wind turbine main control PLC through the redundant power supply branch 19, so as to realize dual power supply of the main control PLC.

[0028] Furthermore, the remote communication module 2 is connected to the sub-control PLC1 via Ethernet, and the remote communication module 2 is connected to the wind turbine ring network switch 11 to realize remote communication between the central control computer 12 and the sub-control PLC1.

[0029] Furthermore, at least three temperature sensors 6 are provided, respectively installed in the converter chamber, the pitch controller chamber, and the UPS system 4 installation chamber; at least two voltage acquisition devices 7 are provided, respectively acquiring the three-phase voltage of the main power supply circuit 15 and the output voltage of the UPS system 4.

[0030] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. An automatic control device for a power supply system of an offshore wind turbine, characterized in that, The system includes a distributed control PLC, an intermediate relay module, a UPS system, an automatic circuit breaker switching device, and a remote communication module. The remote communication module is electrically connected to the distributed control PLC and is connected to the wind turbine ring network switch, forming a dual-PLC redundancy architecture with the wind turbine main control PLC. The intermediate relay module is connected in series in the power supply circuit of the wind turbine main control PLC, and its electromagnetic control unit is electrically connected to the output terminal of the distributed control PLC. The output terminal of the UPS system is electrically connected to the distributed control PLC, the intermediate relay module, and the remote communication module, and the UPS system is connected to the backup power supply terminal of the wind turbine main control PLC. The automatic circuit breaker switching device is linked to the circuit breaker of the wind turbine circuit, and its electromagnetic drive unit is electrically connected to the output terminal of the distributed control PLC.

2. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, It also includes a temperature sensor and a voltage acquisition unit. The temperature sensor is installed in the installation area of ​​the converter and the pitch controller, and the temperature sensor is electrically connected to the input terminal of the sub-control PLC. The voltage acquisition unit is connected to the main power supply circuit of the wind turbine and the output terminal of the UPS system, and the voltage acquisition unit is electrically connected to the input terminal of the sub-control PLC.

3. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, It also includes a three-phase electromagnetic switch device, wherein the three-phase switching part of the three-phase electromagnetic switch device is connected in series in the load power supply branch circuit of the main transformer of the wind turbine and the main frequency converter, and the electromagnetic control part of the three-phase electromagnetic switch device is electrically connected to the output terminal of the sub-control PLC.

4. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, It also includes an over-temperature protection control circuit, which includes a first temperature control switch, a second temperature control switch, and an over-temperature protection control relay. The first temperature control switch is installed in the converter braking unit, and the second temperature control switch is installed in the braking resistor. The normally closed contacts of the first and second temperature control switches are connected in series with the coil of the over-temperature protection control relay and connected to the DC power supply circuit. The normally open contact of the over-temperature protection control relay is connected to the digital input port of the sub-control PLC.

5. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, The automatic circuit breaker opening and closing device includes an electromagnetic drive unit and a mechanical actuator unit. The mechanical actuator unit is linked with the operating mechanism of the corresponding circuit breaker. The electromagnetic drive unit is electrically connected to the output terminal of the sub-control PLC. Each critical circuit circuit breaker is equipped with an independent automatic circuit breaker opening and closing device.

6. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, The input terminal of the UPS system is connected to the main power supply circuit of the wind turbine. The UPS system is connected to the backup power supply terminal of the wind turbine main control PLC through a redundant power supply branch, thereby realizing dual power supply to the main control PLC.

7. The automatic control device for the power supply system of offshore wind turbines according to claim 1, characterized in that, The remote communication module is connected to the sub-control PLC via Ethernet, and the remote communication module is connected to the wind turbine ring network switch to realize remote communication between the central control computer and the sub-control PLC.

8. The automatic control device for the power supply system of offshore wind turbines according to claim 2, characterized in that, At least three temperature sensors are provided, installed in the converter chamber, the pitch controller chamber, and the UPS system installation chamber, respectively; at least two voltage acquisition devices are provided, which collect the three-phase voltage of the main power supply circuit and the output voltage of the UPS system, respectively.

Images