Floating type wind turbine generator intelligent guarantee control system and control method

Abstract

The invention discloses an intelligent guarantee control system and method for a floating type wind turbine generator, and the system comprises a mains supply, a diesel generator, a dual-power switch cabinet, a battery cabinet unit, a time relay group, a redundancy module, at least two lubricating pump units, at least two oil supplementing pump units, a light storage unit, a satellite communication system, a switch, and a control system PLC. The mains supply and the diesel generator are electrically connected with the battery cabinet unit through the dual-power switch cabinet, the diesel generator is in communication connection with the switch and the main PLC of the unit, and the optical storage unit, the lubricating pump unit and the main PLC are electrically connected with the battery cabinet unit. The oil supplementing pump unit, the satellite communication system, the switch, the control system PLC and other power taking devices of the unit are electrically connected with the light storage unit through the time relay set, and the time relay set selects the light storage unit or the battery cabinet unit to supply power through the redundancy module. According to the invention, the problems of power supply and unit state information transmission during construction periods of towing, in-place mooring installation, ballast diving and the like of the unit are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of operation guarantee of floating wind turbines, and in particular to an intelligent guarantee control system and a control method for floating wind turbines. Background Art

[0002] With the increasing development of offshore wind power, the resources of nearshore sites have become increasingly tight. And 80% of the offshore wind resources in China are located in the deep sea more than 50 kilometers offshore. Therefore, floating wind turbines suitable for capturing wind resources in the deep sea have become the development direction of China's future offshore wind power.

[0003] Floating wind turbines need to be hoisted and debugged at the wharf, and then towed to the machine position for in-situ mooring installation, ballasting and diving of the unit, connection of submarine cables, fusion splicing of optical fibers, etc. There are significant differences in construction compared with offshore fixed wind turbines, including towing, mooring installation, and ballasting and diving of the unit. According to the differences between the wharf and the installation site and the construction sea conditions, this difference has a great impact on the construction period, which can be up to two months. During this construction period, there are many uncertainties at sea, and the electricity consumption scenarios and requirements of the unit are diverse. Since the floating wind turbine starts to tow away from the shore power, it serves as a complete unit and needs to be able to supply power by itself to ensure the normal operation and data transmission of functions such as transmission chain lubrication and unit status monitoring during the period until grid connection. At the same time, it also needs to meet the power supply requirements for ballasting and diving by supplying power to the ballast pump.

[0004] Traditional offshore fixed wind turbines solve the power supply requirements before grid connection by equipping large diesel generators and backup power supplies on large platforms and being able to replenish diesel at any time, and there is no need for monitoring data transmission. However, floating wind turbines are difficult to obtain such a large amount of power supply and convenient energy replenishment guarantee during offshore construction, and a large amount of unit monitoring data needs to be transmitted back. Therefore, it is urgent to design a guarantee control system that can ensure the power supply and data transmission functions of floating wind turbines during this period. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an intelligent guarantee control system for floating wind turbines, which integrates functions such as power supply, energy replenishment, monitoring, remote control, and data transmission. It can not only achieve the purpose of unit power supply and monitoring during towing and offshore installation, but also seamlessly connect to the municipal power supply during submarine cable power failure and typhoon power failure to ensure the safety and maintenance requirements of the unit; while ensuring the safe towing, installation, and typhoon resistance of the unit, it can reduce the frequency of personnel boarding for inspection and energy replenishment, and significantly reduce the operation and maintenance costs.

[0006] Another purpose of the present invention is to provide an intelligent guarantee control method for floating wind turbines.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] A floating wind turbine intelligent guarantee control system includes main power supply, diesel generator, dual-power switch cabinet, battery cabinet unit, time relay group, redundant module, at least two lubricating pump units, at least two oil replenishing pump units, photovoltaic and energy storage unit, satellite communication system, switch, and control system PLC. The main power supply and the diesel generator are electrically connected to the battery cabinet unit through the dual-power switch cabinet. The dual-power switch cabinet can automatically switch to the power supply mode of the main power supply or the diesel generator according to requirements. The diesel generator is respectively communicatively connected to the switch and the main PLC of the unit. The photovoltaic and energy storage unit, the lubricating pump unit, and the main PLC are respectively electrically connected to the battery cabinet unit. The oil replenishing pump unit, the satellite communication system, the switch, the control system PLC, and other power-taking devices of the unit are respectively electrically connected to the photovoltaic and energy storage unit through the time relay group. The time relay group selects the photovoltaic and energy storage unit or the battery cabinet unit for power supply through the redundant module, and realizes the timed automatic power supply of the satellite communication system, the oil replenishing pump unit, the switch, the control system PLC, and other power-taking devices of the unit.

[0009] Furthermore, the battery cabinet unit includes a battery cabinet and a battery control cabinet. The battery cabinet is electrically connected to the battery control cabinet. The battery control cabinet is connected to the main power supply and the diesel generator through the dual-power switch cabinet, and the battery control cabinet is communicatively connected to the switch.

[0010] Furthermore, the battery cabinet includes a battery body and a BMS system. The battery body is used for storing and releasing electric energy. The BMS system is used for monitoring the real-time operation status of the battery body. The battery control cabinet includes an EMS system and an inverter system. The EMS system includes a PLC and an industrial computer. The PLC is responsible for control logic processing. The industrial computer is responsible for human-machine interaction and display. The inverter system includes an access system and a PCS body. The access system is used for connecting the main power supply, self-generated power, diesel generator, energy storage, and load, and accepting the control of the PCS body to cooperate with the EMS system to complete grid connection and disconnection switching and realize different working modes. The PCS body is used for realizing the electrical functions in grid-connected and off-grid modes.

[0011] Furthermore, the photovoltaic and energy storage unit includes photovoltaic panels, a photovoltaic battery cabinet, and a photovoltaic energy storage control cabinet. The photovoltaic panels and the photovoltaic battery cabinet are respectively electrically connected to the photovoltaic energy storage control cabinet. The photovoltaic energy storage control cabinet is electrically connected to the time relay group and communicatively connected to the switch. The photovoltaic energy storage control cabinet is powered by the photovoltaic panels and the photovoltaic battery cabinet during the day and requests the battery cabinet unit to supplement power when power is insufficient.

[0012] Further, the lubricating pump unit includes a motor protector, a first contactor, a second contactor, and a lubricating pump. One end of the motor protector is electrically connected to the battery control cabinet of the battery cabinet unit, and the other end thereof is electrically connected to one ends of the first contactor and the second contactor. The other ends of the first contactor and the second contactor are electrically connected to the lubricating pump. Among them, the first contactor is electrically connected to the main PLC, and the second contactor is electrically connected to the control system PLC. The start and stop of the lubricating pump unit are controlled by the main PLC in the grid-connected mode, and the start and stop of the lubricating pump unit are controlled by the control system PLC in the off-grid mode.

[0013] Further, the makeup oil pump unit includes a makeup oil pump circuit breaker, a relay, and a makeup oil pump that are electrically connected in sequence. The coil of the relay is electrically connected to the control system PLC, and the on and off of the relay are controlled by the control system PLC.

[0014] Further, the time relay group includes a first time relay and a second time relay. The coils of the first time relay and the second time relay are connected in parallel. The auxiliary contact of the first time relay and the coil of the second time relay are connected in series. The auxiliary contact of the second time relay and the coil of the first time relay are connected in series. The two time relays work alternately to realize the on and off function of the time relay group in the circuit.

[0015] Further, the main PLC is connected to the battery control cabinet of the battery cabinet unit through a switching power supply and a circuit breaker.

[0016] Further, other power-taking devices of the unit include a ballast system main control, a buoy leakage monitoring system, and sensors. The ballast system main control is used to monitor the liquid levels of each compartment of the unit's ballast system and the draft information of each buoy. The buoy leakage monitoring system is used to monitor the information of the buoy leakage sensors of the unit. The sensors are used to monitor the unit's environment and attitude information, and whether the lubricating pump unit and the makeup oil pump unit are working properly. The ballast system main control, the buoy leakage monitoring system, and the sensors are respectively communicatively connected to a switch, and the switch is communicatively connected to a satellite communication system. The monitoring data is transmitted back to the onshore big data center receiving station through the satellite communication system.

[0017] Another object of the present invention is achieved by the following technical solution:

[0018] An intelligent guarantee control method for a floating wind turbine is realized based on the above-mentioned intelligent guarantee control system for a floating wind turbine, and includes,

[0019] During the period without mains power and without personnel maintenance before grid connection:

[0020] The dual-power switchgear is switched to the power supply mode of the diesel generator, and the diesel generator is set to start automatically. When the power of the battery cabinet of the battery cabinet unit is lower than the set threshold, the main PLC is requested to start by the battery cabinet unit. The battery cabinet is in the off-grid discharge mode. During this period, the entire protection control system is controlled by a time relay group and the control system PLC. The redundant module is used to select the energy storage unit or the battery cabinet unit to supply power to the time relay group. The time relay group triggers the closing and opening of the circuit according to the preset time program. When closed, the energy storage unit supplies power to the oil replenishing pump unit, the satellite communication system, the switch, the control system PLC, and other power-consuming devices of the unit. At the same time, the control system PLC controls the oil replenishing pump unit to start and stop according to the preset time program. When the energy storage unit runs out of power, the energy storage unit requests charging from the battery cabinet unit. The battery cabinet of the battery cabinet unit starts and charges the energy storage unit. The devices on the 24VDC output power supply circuit and the 400VAC output power supply circuit of the battery cabinet unit are all powered on until the energy storage unit is fully charged, and then a power-off command is sent to the battery control cabinet. The control system PLC controls the battery cabinet unit according to the preset lubrication command to make the 400VAC output power supply circuit live. The lubrication pump unit is started regularly by the main PLC until the lubrication command is completed, and then the main PLC controls the battery control cabinet to power off.

[0021] During the period without mains power before grid connection and with personnel maintenance:

[0022] The dual-power switchgear is switched to the power supply mode of the diesel generator. When the crane, elevator, and lighting are needed, the battery cabinet unit is set to the grid-connected mode or the diesel generator is started manually to generate electricity, continuously supplying power to the 24VDC output power supply circuit and the 400VAC output power supply circuit of the battery cabinet unit. The devices on the two output power supply circuits are all powered on. The oil replenishing pump unit and the lubrication pump unit are started regularly according to the preset program. When the power of the battery cabinet unit is lower than the set threshold, the diesel generator is controlled by the main PLC to charge the battery cabinet unit. During this period, the power supply of the 24VDC output power supply circuit and the 400VAC output power supply circuit comes from the diesel generator.

[0023] During shutdown or normal power generation after grid connection:

[0024] The dual-power switchgear is set to the automatic mode, and the battery cabinet unit is set to the grid-connected mode. The mains power is transmitted to the battery cabinet unit through the dual-power switchgear. One way is to charge the battery cabinet unit, and the other way is to supply power to the 24VDC output power supply circuit and the 400VAC output power supply circuit. During this period, the oil replenishing pump unit is started regularly according to the preset program, and the lubrication pump unit is started according to the demand.

[0025] During the period when the mains power fails after grid connection:

[0026] The dual-power switch cabinet is set to the automatic mode, and the battery cabinet unit is set to the grid-connected mode, continuously supplying power to its 24VDC output power supply circuit and 400VAC output power supply circuit. If the power outage time of the commercial power exceeds the preset time, the battery cabinet unit is switched to the off-grid discharge mode through the main PLC to save power. When the power of the battery cabinet unit is lower than the set threshold, the diesel generator is started through the control of the main PLC, and the dual-power switch cabinet automatically switches to the power supply mode of the diesel generator to charge the battery cabinet unit. During this period, the entire guarantee control system is controlled by the time relay group and the control system PLC, and the unit is automatically powered on at regular intervals to ensure the operation of the unit and the transmission of data.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] 1. The present invention solves the problems of the necessary power supply and the transmission of unit status information during the construction period of the floating wind turbine, such as towing, in-place mooring installation, and ballast diving. It realizes the lubrication and maintenance of the unit and the monitoring of the safety status. When there is an abnormal state, it can give an early warning in the background in the first time and take measures to reduce losses.

[0029] 2. By writing programs into the control system PLC and setting the time relay group, the present invention realizes the function of supplying power to the unit and transmitting data at regular intervals. On the premise of achieving a stable automatic operation effect, it greatly reduces energy consumption, extends the working hours of the guarantee control system, and avoids frequent boarding of personnel for inspection, maintenance, and energy replenishment, thus reducing the risk of personal accidents and the operation and maintenance costs.

[0030] 3. By setting the commercial power supply circuit and the PCS power supply circuit, the components related to the safety of the unit are distributed to the PCS power supply circuit (i.e., the output power supply circuit of the battery control cabinet). The power supply source of the PCS power supply circuit is switched to the commercial power or the diesel generator through the dual-power switch. It can not only ensure power supply during towing before grid connection, but also after grid connection, the PCS power supply circuit can be supplied by the commercial power or self-generated power without changing the wiring. And in case of power outage of the submarine cable, typhoon resistance power outage, damage of the submarine cable optical fiber, etc., the PCS power supply circuit can still be kept powered through this system to ensure the lubrication and maintenance of the drive chain and the monitoring of the unit status. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the system schematic diagram of the present invention.

[0032] Figure 2 It is the network topology diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] As Figures 1 to 2 shown, this embodiment provides a floating wind turbine intelligent guarantee control system, including a mains power supply T1, a diesel generator G1, a dual-power switch cabinet S1, a battery cabinet unit, a time relay group U4, a redundant module U8, at least two lubricating pump units, at least two oil replenishing pump units, a photovoltaic and energy storage unit, a satellite communication system U5, a switch U6, and a control system PLC A2; the mains power supply T1 and the diesel generator G1 are electrically connected to the battery cabinet unit through the dual-power switch cabinet S1. The dual-power switch cabinet includes an automatic mode and a manual mode, and can automatically switch to the power supply mode of the mains power supply or the diesel generator according to requirements. In the automatic mode, when there is both mains power and the diesel generator for power supply, the mains power is selected; when there is no mains power and only the diesel generator, it will automatically switch to the diesel generator for power supply; the diesel generator G1 is respectively communicatively connected to the switch U6 and the main PLC A1 of the unit, and the start and stop of the diesel generator G1 are controlled by the main PLC A1, and it can also be manually started; the dual-power switch cabinet S1 is communicatively connected to the main PLC A1, the photovoltaic and energy storage unit, the lubricating pump unit, and the main PLC A1 are respectively electrically connected to the battery cabinet unit, and the oil replenishing pump unit, the satellite communication system U5, the switch U6, the control system PLC A2, and other power-taking devices U7 of the unit are respectively electrically connected to the photovoltaic and energy storage unit through the time relay group U4; the time relay group U4 selects the 24VDC power supply of the photovoltaic and energy storage unit or the battery cabinet unit through the redundant module U8, and realizes the timed automatic power supply of the satellite communication system U5, the oil replenishing pump unit, the switch U6, the control system PLC A2, and other power-taking devices U7 of the unit through the time relay group U4.

[0036] The battery cabinet unit includes a battery cabinet G4 and a battery control cabinet U2. The battery cabinet G4 is electrically connected to the battery control cabinet U2. The battery control cabinet U2 is connected to the mains power supply and the diesel generator through the dual-power switch cabinet S1. The battery control cabinet U2 is communicatively connected to the switch U6.

[0037] Specifically, the battery cabinet G4 includes a battery body and a BMS system. The battery body is used to store and release electrical energy. The BMS system is used to monitor the real-time operating status of the battery body, provide protection strategies for temperature and voltage for the battery body, and provide data services and instruction responses to the outside world. The battery control cabinet U2 includes an EMS system and an inverter system (equipped with a cooling system). The EMS system includes a PLC and an industrial computer. The PLC is responsible for control logic processing, and the industrial computer is responsible for human-machine interaction and display. The inverter system includes an access system and a PCS body. The access system is used to connect the commercial power, self-generated power, and diesel generator, energy storage, and load, and accept the control of the PCS body, cooperate with the EMS system to complete grid-connected and off-grid switching, and realize different working modes. The PCS body is used to realize electrical functions in grid-connected and off-grid modes, such as charging and discharging in grid-connected mode, and loading in off-grid mode, etc.

[0038] In this embodiment, the battery cabinet G4 and the battery control cabinet U2 that can store a large amount of electricity are regarded as the system center. Its power input end is the dual-power switch cabinet S1, and the dual-power switch cabinet S1 is powered by commercial power / self-generated power / diesel generator. When there is commercial power or self-generated power, the battery control cabinet U2 supplies power in grid-connected mode. The dual-power switch cabinet S1 automatically switches to the commercial power supply circuit to supply power to the battery control cabinet U2. Its power is divided into two paths in the battery control cabinet U2. One path charges the battery cabinet G4, and the other path supplies power to each output power supply circuit. When the commercial power fails or the dual-power switch cabinet S1 is manually switched to the diesel generator G1 (the dual-power switch cabinet S1 can be embedded in the cabinet of the diesel generator G1 for easy control), the battery control cabinet U2 supplies power in off-grid mode, and its start or stop can be manually set to save power when electricity is not needed, but there is still self-power consumption of the EMS system.

[0039] The photovoltaic energy storage unit includes a photovoltaic panel G3, a photovoltaic battery cabinet G2, and a photovoltaic energy storage control cabinet U3. The photovoltaic panel G3 and the photovoltaic battery cabinet G2 are electrically connected to the photovoltaic energy storage control cabinet U3 respectively. The photovoltaic energy storage control cabinet U3 is electrically connected to the time relay group U4 and communicates with the switch U6. The photovoltaic energy storage control cabinet U3 is powered by the photovoltaic panel G3 and the photovoltaic battery cabinet G2 during the day, and requests the battery cabinet to supplement power during power feeding.

[0040] The lubricating pump unit uses 380VAC power supply to conduct large-flow oil lubrication for key components of the drive chain. In this embodiment, two lubricating pump units are provided, which respectively include a motor protector Q1, a first contactor KM1, a second contactor KM3, a lubricating pump M1, a motor protector Q2, a first contactor KM2, a second contactor KM4, and a lubricating pump M4. One end of the motor protector Q1 is electrically connected to the battery control cabinet U2, and the other end is electrically connected to one ends of the first contactor KM1 and the second contactor KM3. The other ends of the first contactor KM1 and the second contactor KM3 are electrically connected to the lubricating pump M1. One end of the motor protector Q2 is electrically connected to the battery control cabinet U2, and the other end is electrically connected to one ends of the first contactor KM2 and the second contactor KM4. The other ends of the first contactor KM2 and the second contactor KM4 are electrically connected to the lubricating pump M2. Among them, the first contactor KM1 and the first contactor KM2 are respectively electrically connected to the main PLC A1, and the second contactor KM3 and the second contactor KM4 are respectively electrically connected to the control system PLC A2. In the grid-connected mode, the start and stop of the lubricating pump unit are controlled by the main PLC A1, and in the off-grid mode, the start and stop of the lubricating pump unit are controlled by the control system PLC A2. In practical applications, the program of the control system PLC A2 can be set according to different working conditions to control the energization of the second contactor, and finally control the start and stop of the lubricating pump. For example, during the impeller locking period, the program can be set so that the main pump runs for 36 minutes every 2 days; during the impeller release period, the program can be set so that the main pump runs for 36 minutes every 1 day; during the typhoon resistance period, it can be set to run for 18 minutes every 1 hour.

[0041] The make-up oil pump unit uses 24VDC power supply to conduct small-flow oil lubrication for key components of the unit drive chain, so as to maintain the unit drive chain at critical times. In this embodiment, two make-up oil pump units are provided, which respectively include a make-up oil pump circuit breaker F2, a relay K1, and a make-up oil pump M3 that are electrically connected in sequence, and a make-up oil pump circuit breaker F3, a relay K2, and a make-up oil pump M4 that are electrically connected in sequence. The coils of the relay K1 and the relay K2 are electrically connected to the control system PLC A2, and the control system PLC A2 controls the on and off of the relay K1 and the relay K2. By remotely and portably setting the operation cycle of the make-up oil pump, the program can be changed at any time when powered on to modify the operation time. For example, it is set to run for 18 minutes every 6 hours, taking into account the power of the photovoltaic energy storage control cabinet while ensuring the lubrication and maintenance of the drive chain.

[0042] The coil of the time relay group U4 is powered by 24VDC selected by the redundant module from the photovoltaic and energy storage control cabinet or the battery control cabinet U2. When the battery control cabinet U2 or the battery cabinet G4 is closed, damaged, or in a power-fed state, it does not affect the operation of the time relay. The time relay group U4 includes a first time relay and a second time relay. The coils of the first time relay and the second time relay are connected in parallel. The auxiliary contact of the first time relay and the coil of the second time relay are connected in series. The auxiliary contact of the second time relay and the coil of the first time relay are connected in series. The two time relays work alternately to realize the on-off function of the time relay group in the circuit. In this embodiment, the first time relay is set to work for 30% of the time, and the second time relay is set to work for 70% of the time. The two work alternately, so that the time relay group U4 is closed for 18 minutes and disconnected for 42 minutes per hour, thereby realizing the timed automatic power supply of each communication device and sensor.

[0043] The main PLC A1 is connected to the battery control cabinet U2 through the switching power supply U1 and the circuit breaker F1.

[0044] Other power-taking devices U7 of the unit include the main control of the ballast system, the floating drum leakage monitoring system and sensors. The main control of the ballast system is used to monitor the liquid level of each compartment of the unit's ballast system and the draft information of each floating drum. The floating drum leakage monitoring system is used to monitor the information of the floating drum leakage sensors of the unit. The sensors are used to monitor the environmental and attitude information of the unit, and whether the lubricating pump unit and the supplementary oil pump unit are working properly. The main control of the ballast system, the floating drum leakage monitoring system and the sensors are respectively connected to the switch U6 for communication. The satellite communication system U5 is connected to the switch U6 for communication. By sending the monitoring data to the switch U6 through the network cable, and then through the encryption device of the satellite communication system U5 for encryption processing, it is transmitted back to the onshore big data center receiving station for storage. Relevant personnel can access the unit operation data through the web page, and can also receive simple operation instructions from onshore personnel and issue and execute them through the industrial computer of the satellite communication system U5.

[0045] Embodiment 2:

[0046] This embodiment provides an intelligent guarantee control method for a floating wind turbine, which is realized based on the floating wind turbine intelligent guarantee control system described in Embodiment 1, including,

[0047] During the period without commercial power before grid connection and without personnel maintenance:

[0048] Switch to the power supply mode of the diesel generator from the dual-power switchgear cabinet. The diesel generator is set to start automatically. When the power of the battery cabinet of the battery cabinet unit is lower than the set threshold, the main PLC is requested to start by the battery cabinet unit. The battery cabinet is in the off-grid discharge mode. During this period, the entire guarantee control system is controlled by the time relay group and the control system PLC; the redundant module is used to select the photovoltaic and energy storage unit or the battery cabinet unit to supply power to the time relay group. The time relay group triggers the loop to close and open according to the preset time program. For example, in this embodiment, it is set to close for 18 minutes and open for 42 minutes within each hour. When it is closed, the photovoltaic and energy storage unit supplies power to the oil replenishing pump unit, the satellite communication system, the switch, the control system PLC, and other power-taking devices of the unit. At the same time, the control system PLC controls the oil replenishing pump unit to start and stop according to the preset time program. For example, in this embodiment, it is set to run for 18 minutes every 6 hours; when the photovoltaic and energy storage unit is out of power, the photovoltaic and energy storage unit requests charging from the battery cabinet unit. The battery cabinet of the battery cabinet unit starts and charges the photovoltaic and energy storage unit. The devices on the 24VDC output power supply circuit and the 400VAC output power supply circuit of the battery cabinet unit are all powered on until the photovoltaic and energy storage unit is fully charged, and then a power-off instruction is sent to the battery control cabinet; the control system PLC controls the battery cabinet unit according to the preset lubrication instruction to make the 400VAC output power supply circuit energized, and the lubrication pump unit is started regularly by the main PLC until the lubrication instruction is completed, and then the main PLC controls the battery control cabinet to power off;

[0049] During the period without mains power before grid connection and with personnel maintenance:

[0050] Switch to the power supply mode of the diesel generator from the dual-power switchgear cabinet. When the crane, elevator, and lighting are needed, set the battery cabinet unit to the grid-connected mode or manually start the diesel generator to generate electricity, and continuously supply power to its 24VDC output power supply circuit and 400VAC output power supply circuit. The other devices on the two output power supply circuits are all powered on. The oil replenishing pump unit and the lubrication pump unit are started regularly according to the preset program; when the power of the battery cabinet unit is lower than the set threshold, the diesel generator is controlled by the main PLC to charge the battery cabinet unit. During this period, the power supply of the 24VDC output power supply circuit and the 400VAC output power supply circuit comes from the diesel generator;

[0051] During the period after grid connection during shutdown or normal power generation:

[0052] Set the dual-power switchgear cabinet to the automatic mode and the battery cabinet unit to the grid-connected mode. The mains power is transmitted to the battery cabinet unit through the dual-power switchgear cabinet. One way is to charge the battery cabinet unit, and the other way is to supply power to the 24VDC output power supply circuit and the 400VAC output power supply circuit. During this period, the oil replenishing pump unit is started regularly according to the preset program, and the lubrication pump unit is started according to the demand;

[0053] During the period after grid connection when the mains power fails:

[0054] The dual-power switch cabinet is set to the automatic mode, and the battery cabinet unit is set to the grid-connected mode, and continuously supplies power to its 24VDC output power supply circuit and 400VAC output power supply circuit. If the power failure time of the commercial power exceeds the preset time, the battery cabinet unit is switched to the off-grid discharge mode through the main PLC to save power; when the power of the battery cabinet unit is lower than the set threshold, the diesel generator is started through the control of the main PLC, and the dual-power switch cabinet automatically switches to the power supply mode of the diesel generator to charge the battery cabinet unit. During this period, the entire protection control system is controlled by the time relay group and the control system PLC, and automatically supplies power to the 24VDC and 400VAC equipment of the unit at regular intervals to ensure the operation of the unit and the transmission of data.

[0055] As mentioned above, it is only a preferred embodiment of the present invention patent, but the protection scope of the present invention patent is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention patent, according to the technical solution of the present invention patent and its inventive concept, makes equivalent substitutions or changes, all belong to the protection scope of the present invention patent.

Claims

1. An intelligent security control system for a floating wind turbine, characterized in that: It includes AC power, a diesel generator, a dual-power switch cabinet, a battery cabinet unit, a time relay group, a redundant module, at least two lubrication pump units, at least two oil replenishment pump units, a photoelectric storage unit, a satellite communication system, a switch and a control system PLC. The AC power and the diesel generator are electrically connected to the battery cabinet unit through the dual-power switch cabinet, and the dual-power switch cabinet can automatically switch to the power supply mode of the AC power or the diesel generator according to demand. The diesel generator is respectively communicated with the switch and the main PLC of the unit, and the photoelectric storage unit, the lubrication pump unit and the main PLC are respectively electrically connected to the battery cabinet unit. The oil replenishment pump unit, the satellite communication system, the switch, the control system PLC and other power-taking equipment of the unit are respectively electrically connected to the photoelectric storage unit through the time relay group. The time relay group selects the photoelectric storage unit or the battery cabinet unit for power supply through the redundant module, and realizes the timed automatic power supply of the satellite communication system, the oil replenishment pump unit, the switch, the control system PLC and other power-taking equipment of the unit through the time relay group.

2. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The battery cabinet unit includes a battery cabinet and a battery control cabinet. The battery cabinet is electrically connected to the battery control cabinet. The battery control cabinet is connected to the mains and the diesel generator through a dual power switch cabinet. The battery control cabinet is communicatively connected to the switch.

3. The intelligent security control system for floating wind turbines according to claim 2 is characterized in that: The battery cabinet includes a battery body and a BMS system. The battery body is used to store and release electric energy, and the BMS system is used to monitor the real-time operating status of the battery body. The battery control cabinet includes an EMS system and an inverter system. The EMS system includes a PLC and an industrial computer. The PLC is responsible for control logic processing, and the industrial computer is responsible for human-machine interaction and display. The inverter system includes an access system and a PCS body. The access system is used to connect to the mains, self-generated electricity and diesel generators, store energy and loads, and accept the control of the PCS body, cooperate with the EMS system to complete the on-grid and off-grid switching, and realize different working modes. The PCS body is used to realize electrical functions in on-grid and off-grid modes.

4. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The photo-storage unit includes a photovoltaic panel, a photovoltaic battery cabinet and a photovoltaic energy storage control cabinet. The photovoltaic panel and the photovoltaic battery cabinet are electrically connected to the photovoltaic energy storage control cabinet respectively. The photovoltaic energy storage control cabinet is electrically connected to a time relay group and is communicatively connected to a switch. The photovoltaic energy storage control cabinet relies on photovoltaic panels and photovoltaic battery cabinets for power supply during the day, and requests the battery cabinet unit for additional power supply when feeding power.

5. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The lubrication pump unit includes a motor protector, a first contactor, a second contactor and a lubrication pump, one end of the motor protector is electrically connected to the battery control cabinet of the battery cabinet unit, and the other end thereof is electrically connected to one end of the first contactor and the second contactor, and the other ends of the first contactor and the second contactor are electrically connected to the lubrication pump, wherein the first contactor is electrically connected to the main PLC, and the second contactor is electrically connected to the control system PLC. In the grid-connected mode, the start and stop of the lubrication pump unit is controlled by the main PLC, and in the off-grid mode, the start and stop of the lubrication pump unit is controlled by the control system PLC.

6. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The oil replenishment pump unit comprises an oil replenishment pump circuit breaker, an intermediate relay and an oil replenishment pump which are electrically connected in sequence. The coil of the intermediate relay is electrically connected to the control system PLC, and the control system PLC controls the on and off of the intermediate relay.

7. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The time relay group includes a first time relay and a second time relay, the coil of the first time relay and the coil of the second time relay are connected in parallel, the auxiliary contact of the first time relay and the coil of the second time relay are connected in series, the auxiliary contact of the second time relay and the coil of the first time relay are connected in series, and the two time relays work alternately to realize the on-off function of the time relay group in the circuit.

8. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: The main PLC is connected to the battery control cabinet of the battery cabinet unit through a switching power supply and a circuit breaker.

9. The intelligent security control system for floating wind turbines according to claim 1 is characterized in that: Other power-taking equipment of the unit include a ballast system main control, a buoy leakage monitoring system and sensors. The ballast system main control is used to monitor the liquid level of each compartment of the unit's ballast system and the draft information of each buoy. The buoy leakage monitoring system is used to monitor the leakage sensor information of each buoy of the unit. The sensors are used to monitor the unit's environment and posture information, and whether the lubrication pump unit and the oil replenishment pump unit are working properly. The ballast system main control, the buoy leakage monitoring system and the sensors are respectively connected to the switch for communication, and the switch is connected to the satellite communication system for communication, and the monitoring data is transmitted back to the onshore big data center receiving station through the satellite communication system.

10. An intelligent security control method for a floating wind turbine generator set, characterized in that: The intelligent protection control system for floating wind turbines according to any one of claims 1 to 9 is implemented, comprising: Before grid connection, when there is no mains power and no maintenance personnel: The dual power switch cabinet switches to the power supply mode of the diesel generator, and the diesel generator is set to self-start. When the power of the battery cabinet of the battery cabinet unit is lower than the set threshold, the battery cabinet unit requests the main PLC to start, and the battery cabinet is in off-grid discharge mode. During this period, the entire security control system is controlled by the time relay group and the control system PLC; the redundant module selects the photovoltaic storage unit or the battery cabinet unit to power the time relay group, and the time relay group triggers the circuit to close and open according to the preset time program. When closed, the photovoltaic storage unit supplies power to the oil replenishment pump unit, satellite communication system, switch, control system PLC and other power-taking equipment of the unit, and the control The system PLC controls the oil replenishment pump unit to start and stop according to the preset time program; when the photovoltaic storage unit feeds power, the photovoltaic storage unit requests charging from the battery cabinet unit, the battery cabinet of the battery cabinet unit starts and charges the photovoltaic storage unit, and the equipment on the 24VDC output power supply circuit and the 400VAC output power supply circuit of the battery cabinet unit are powered on until the photovoltaic storage unit is fully charged, and then a power-off command is sent to the battery control cabinet; the control system PLC controls the battery cabinet unit to energize its 400VAC output power supply circuit according to the preset lubrication command, and controls the start of the lubrication pump unit through the main PLC until the lubrication command is completed, and then the main PLC controls the battery control cabinet to power off; Before grid connection, when there is no mains power and maintenance personnel are present: The dual power switch cabinet switches to the diesel generator power supply mode. When the crane, elevator, or lighting is needed, the battery cabinet unit is set to the grid-connected mode or the diesel generator is manually started to generate electricity. The 24VDC output power supply circuit and the 400VAC output power supply circuit of the battery cabinet unit are continuously powered. The equipment on the two output power supply circuits are powered and work, and the oil replenishment pump unit and the lubrication pump unit are turned on at a preset time according to the preset program. When the battery cabinet unit power is lower than the set threshold, the main PLC controls the diesel generator to charge the battery cabinet unit. During this period, the power supply for the 24VDC output power supply circuit and the 400VAC output power supply circuit comes from the diesel generator. During shutdown or normal power generation after grid connection: The dual power switch cabinet is set to automatic mode, and the battery cabinet unit is set to grid-connected mode. The mains power is transmitted to the battery cabinet unit through the dual power switch cabinet. One way is used to charge the battery cabinet unit, and the other way is used to supply power to the 24VDC output power supply circuit and the 400VAC output power supply circuit. During this period, the oil replenishment pump unit is turned on at a scheduled time according to the preset program, and the lubrication pump unit is turned on according to demand; During the power outage period after grid connection: The dual-power switch cabinet is set to automatic mode, the battery cabinet unit is set to grid-connected mode, and continues to supply power to its 24VDC output power supply circuit and 400VAC output power supply circuit. If the mains power failure time exceeds the preset time, the main PLC switches the battery cabinet unit to off-grid discharge mode to save power. When the battery cabinet unit power is lower than the set threshold, the main PLC controls the diesel generator to start, and the dual-power switch cabinet automatically switches to the diesel generator power supply mode to charge the battery cabinet unit. During this period, the entire security control system is controlled by the time relay group and the control system PLC, and the operation of the unit and the return of data are guaranteed by automatic power supply at a fixed time.

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