Remote control method and system for offshore floating type unit

Abstract

The invention provides an offshore floating unit remote control method and system, and the method comprises the steps: S1, an SCADA server generates an instruction signal, and transmits the instruction signal to a command and control server, and the command and control server intermittently transmits a corresponding instruction signal to a Beidou satellite; s2, the Beidou satellite forwards the received instruction signal to a unit, the unit starts a backup power supply or sends unit state information to the Beidou satellite according to the instruction signal, and then the unit closes the backup power supply; s3, the Beidou satellite forwards the unit state information to the command and control server, the command and control server intermittently receives the state information according to the transmission capacity and forwards the state information to the SCADA server, and then the steps S1 to S3 are repeated until the number of times of starting the backup power supply reaches a preset value; and S4, keeping the backup power supply in a starting state, and executing a preset typhoon-resisting strategy by the unit. According to the invention, the problem that the communication between the floating unit and the land control center is difficult due to the fact that the traditional mobile communication network cannot cover in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a remote control method and system for an offshore floating unit. Background Art

[0002] Floating units are usually deployed in deep waters far from land. They often face complex and changeable water environments, such as waves, tides, storms, etc., which puts high demands on the stability and reliability of communication and monitoring equipment. In waters far from land, traditional mobile communication networks are often unable to cover, making communication between floating units and onshore control centers a problem. In order to ensure the normal operation of floating units and respond to emergencies in a timely manner, it is necessary to monitor their key information in real time, including key performance parameters such as unit operating status, wind speed and direction, power, and speed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a remote control method and system for an offshore floating unit, which solves the problem in the prior art that traditional mobile communication networks are often unable to cover, resulting in communication difficulties between the floating unit and the onshore control center.

[0004] According to an embodiment of the present invention, a remote control method for an offshore floating unit includes:

[0005] S1: The SCADA server generates a command signal and sends it to the command server. The command server intermittently sends the corresponding command signal to the Beidou satellite according to the transmission capacity.

[0006] S2: The BeiDou satellite forwards the received command signal to the crew, and the crew starts the backup power supply or sends the crew status information to the BeiDou satellite according to the command signal, and then the crew shuts down the backup power supply;

[0007] S3: Beidou satellite forwards the unit status information to the command server. The command server intermittently receives the status information and forwards it to the SCADA server according to the transmission capacity, and then repeats steps S1-S3 until the number of backup power startups reaches the preset value;

[0008] S4: Keep the backup power supply started and the unit executes the preset anti-typhoon strategy.

[0009] Preferably, the command signal includes a control command and a query command;

[0010] When the unit receives a control command, the backup power supply is started. When the unit receives a query command, the unit status information is sent to the Beidou satellite.

[0011] Preferably, the query instruction and the control instruction are both generated once at a fixed time interval. When the SCADA server receives the unit status information, the generation time of the control instruction is reset, and the control instruction is forced to be generated after a preset time.

[0012] Preferably, when there are both control instructions and query instructions in the command server, if the sum of the channel capacities required by the control instructions and the query instructions is less than or equal to the transmission capacity, the command server will send the control instructions and the query instructions to the Beidou satellite at the same time;

[0013] If the sum of the channel capacities required for control commands and query commands is greater than the transmission capacity, the command server will only send control commands to the Beidou satellite.

[0014] Preferably, if the control instructions are sent 3 times cumulatively, the query instruction is forcibly sent after waiting for 10 seconds.

[0015] Preferably, when sending command signals and receiving unit status information, the command server uses a time division multiple access method to divide time into multiple time slots, and divide the command signals and unit status information into multiple data blocks, each time slot being used to send a command signal or a data block of unit status information.

[0016] Preferably, sending data blocks of command signals and receiving data blocks of unit status information are performed alternately.

[0017] On the other hand, according to an embodiment of the present invention, there is also provided an offshore floating unit remote control system, the system using the above-mentioned offshore floating unit remote control method, comprising:

[0018] A SCADA server, wherein the SCADA server is used to generate a command signal;

[0019] A command server, the command server is used to temporarily cache the command signal and the unit status information, and forward the command signal and the unit status information;

[0020] Beidou satellite, the Beidou satellite is used to forward command signals and crew status information.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Beidou satellites are used to forward the command signals used by the SCADA server to control the operation of offshore units and the unit status information, solving the coverage problem of the mobile communication network and ensuring good communication between the floating unit and the onshore control center. At the same time, the command server intermittently sends command signals and unit status information according to the transmission capacity to avoid mutual interference caused by simultaneous execution of receiving and sending operations, thereby improving the communication rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a flow chart of a control method according to an embodiment of the present invention.

[0024] Figure 2 FIG. 4 is a control system architecture diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a remote control method for an offshore floating unit, comprising:

[0027] S1: The SCADA server generates a command signal and sends it to the command server. The command server intermittently sends the corresponding command signal to the Beidou satellite according to the transmission capacity.

[0028] The SCADA server is connected to the command server via the modbus-tcp protocol.

[0029] The command signal includes a control command and a query command. The control command is used to enable the unit to start the backup power supply and start switching to the anti-typhoon mode. The query command is used to enable the unit to upload its own unit status information so that the ground platform can accurately know the status of the unit and perform timely maintenance on the unit.

[0030] When a typhoon comes, ground staff will operate the SCADA server to automatically generate command signals. Among them, query commands are generated every 120 seconds and control commands are generated every 60 seconds. After the command signal is generated, the SCADA server automatically sends the command signal to the command server.

[0031] After receiving the command signal, the command server sends the command signal to the Beidou satellite. Since both the control command and the query command are generated every minute, the command server will most likely cache both the control command and the query command. When both the control command and the query command exist in the command server at the same time, if the sum of the channel capacities required for the control command and the query command is less than or equal to the transmission capacity, the command server will send both the control command and the query command to the Beidou satellite at the same time; if the sum of the channel capacities required for the control command and the query command is greater than the transmission capacity, the command server will only send the control command to the Beidou satellite.

[0032] In addition, if the control command is sent three times cumulatively, wait for 10 seconds and then force the query command to be sent.

[0033] S2: The BeiDou satellite forwards the received command signal to the crew, and the crew starts the backup power supply or sends the crew status information to the BeiDou satellite according to the command signal, and then the crew shuts down the backup power supply;

[0034] The offshore wind turbine is equipped with a Beidou short message communication data terminal connected to the Beidou satellite. The Beidou short message communication data terminal uploads data to the Beidou server through the Beidou satellite signal, and receives instructions from the Beidou server to the backup power supply PCS (control system) module. The backup power supply PCS module can also communicate with the wind turbine's PLC through the RS485 serial port or network cable using modbus-tcp\modbus-Rtu.

[0035] When the unit receives a control command, it starts the backup power supply and starts the preset typhoon resistance mode of the wind turbine. When it receives a query command, it uploads key information of the unit, such as wind speed and direction, power, speed, operating status and other information of the wind turbine, as well as battery power and current of the backup power supply, to the Beidou satellite through the Beidou short message communication data terminal.

[0036] In addition, in order to avoid misoperation, the unit should confirm multiple times whether to start the anti-typhoon strategy. Therefore, in the present invention, when receiving three consecutive control instructions, it is judged that the unit needs to execute the anti-typhoon strategy. If it does not reach three times, the backup power supply will be started and then turned off.

[0037] S3: Beidou satellite forwards the unit status information to the command server. The command server intermittently receives the status information and forwards it to the SCADA server according to the transmission capacity, and then repeats steps S1-S3 until the number of backup power startups reaches the preset value;

[0038] Generally speaking, for Beidou civilian terminal devices, read and write operations are not issued at the same time. Because when the device receives (reads) data, it needs to capture, track and demodulate satellite signals, and this process takes a certain amount of time and equipment resources. If the command signal is sent and the status information is received at the same time, it may interfere with the receiving process, resulting in data reception errors or transmission failures.

[0039] Therefore, in the process of the command server sending command signals, the time division multiple access (TDMA) technology is used to divide the time into multiple time slots, and the command signals and unit status information are divided into multiple data blocks. The receiving of command signals and the sending of unit status information are arranged in different time slots (usually, receiving and sending are performed alternately), so that the device looks like it is performing read and write operations at the same time, but in fact they are performed alternately in extremely short time intervals.

[0040] Then repeat the above steps S1-S3 and send control instructions to the unit three times in succession.

[0041] S4: Keep the backup power supply started and the unit executes the preset anti-typhoon strategy.

[0042] In order to avoid misoperation, the unit should confirm whether to start the anti-typhoon strategy for multiple times. Therefore, when receiving three consecutive control instructions, the present invention determines that the unit needs to execute the anti-typhoon strategy, controls the wind turbine to keep the backup power supply in the started state, and starts the preset anti-typhoon mode.

[0043] On the other hand, an embodiment of the present invention further provides an offshore floating unit remote control system, which uses the above-mentioned offshore floating unit remote control method, including:

[0044] A SCADA server, wherein the SCADA server is used to generate a command signal;

[0045] A command server, the command server is used to temporarily cache the command signal and the unit status information, and forward the command signal and the unit status information;

[0046] Beidou satellite, the Beidou satellite is used to forward command signals and crew status information.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A remote control method for an offshore floating unit, characterized in that: include: S1: The SCADA server generates a command signal and sends it to the command server. The command server intermittently sends the corresponding command signal to the Beidou satellite according to the transmission capacity. S2: The BeiDou satellite forwards the received command signal to the crew, and the crew starts the backup power supply or sends the crew status information to the BeiDou satellite according to the command signal, and then the crew shuts down the backup power supply; S3: Beidou satellite forwards the unit status information to the command server. The command server intermittently receives the status information and forwards it to the SCADA server according to the transmission capacity, and then repeats steps S1-S3 until the number of backup power startups reaches the preset value; S4: Keep the backup power supply started and the unit executes the preset anti-typhoon strategy.

2. A remote control method for an offshore floating unit according to claim 1, characterized in that: The command signal includes a control command and a query command; When the unit receives a control command, the backup power supply is started. When the unit receives a query command, the unit status information is sent to the Beidou satellite.

3. A remote control method for an offshore floating unit according to claim 2, characterized in that: Both query instructions and control instructions are generated once at fixed time intervals. When the SCADA server receives the unit status information, it resets the generation time of the control instruction and forces the control instruction to be generated after the preset time.

4. A remote control method for an offshore floating unit according to claim 2, characterized in that: When there are both control instructions and query instructions in the command and control server, if the sum of the channel capacities required by the control instructions and the query instructions is less than or equal to the transmission capacity, the command and control server will send the control instructions and the query instructions to the Beidou satellite at the same time; If the sum of the channel capacities required for control commands and query commands is greater than the transmission capacity, the command server will only send control commands to the Beidou satellite.

5. A remote control method for an offshore floating unit according to claim 4, characterized in that: If control commands are sent three times cumulatively, after waiting for 10 seconds, a query command is forcibly sent.

6. A remote control method for an offshore floating unit according to claim 2, characterized in that: When sending command signals and receiving unit status information, the command server uses time division multiple access method to divide time into multiple time slots, and divide the command signals and unit status information into multiple data blocks. Each time slot is used to send a command signal or a data block of unit status information.

7. A remote control method for an offshore floating unit according to claim 6, characterized in that: The data blocks of sending command signals and receiving the data blocks of unit status information are carried out alternately.

8. A remote control system for an offshore floating unit, characterized in that: The system uses a remote control method for an offshore floating unit as claimed in any one of claims 1 to 7, comprising: A SCADA server, wherein the SCADA server is used to generate a command signal; A command server, the command server is used to temporarily cache the command signal and the unit status information, and forward the command signal and the unit status information; Beidou satellite, the Beidou satellite is used to forward command signals and crew status information.

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