Automatic parallel control method for marine parallel hybrid power systems

Abstract

This invention relates to an automatic parallel operation control method for a parallel hybrid power system on a ship. Upon receiving a corresponding mode switching command, the method detects the operating conditions, adjusts the speed and torque of the components to be paralleled, and checks if the parallel operation conditions are met. If the conditions are met, automatic parallel synchronization control is initiated. If automatic parallel synchronization is completed, the corresponding clutches are automatically engaged and disengaged, followed by automatic load transfer control. If load transfer is complete, the corresponding clutches are disengaged, completing the mode switch. This method achieves fully automatic control, improves the success rate, efficiency, and automation level of parallel operation and mode switching in the parallel hybrid power system, prevents the entire ship from losing power and electricity, and enhances the safety of switching between different modes, thereby ensuring the safe and reliable operation of the parallel hybrid power ship.

Description

Technical Field

[0001] This invention relates to a ship control technology, and more particularly to an automatic parallel control method for a ship parallel hybrid power system. Background Technology

[0002] The energy crisis and increasingly stringent emission regulations have become severe challenges that the shipping industry has to face. In the face of energy shortages and stringent emission regulations, the use of new hybrid power systems has become an important direction for the future development of ships. Parallel hybrid power systems are now being used more and more on various ship types, such as ocean-going vessels (small and medium-sized container ships, chemical tankers, etc.), tugboats, ferries, yachts, and government vessels.

[0003] The parallel hybrid power system of ships integrates traditional diesel engine propulsion, variable frequency drive, ship power system and automatic control system. It involves a large number of devices, and different devices have different combinations of use in different operating modes. It is a highly integrated mechanical and electrical system.

[0004] The switching conditions between different modes of a ship's parallel hybrid power system are numerous and involve the ship's core power and electrical systems. The switching process and steps between different modes must be strictly followed in advance. Once the operation fails, the entire ship will lose power and electricity, which will seriously affect the safety of the ship.

[0005] To improve the success rate, efficiency, and automation of parallel hybrid power systems in merging and switching between different modes, reduce the impact of switching between different modes on ship safety, and avoid the loss of power and electricity to the entire ship, it is necessary to study an automatic merging control method for parallel hybrid power systems to achieve the above objectives. Summary of the Invention

[0006] To address the issue of reducing the failure rate of switching between various modes in parallel hybrid power systems, an automatic parallel control method for marine parallel hybrid power systems is proposed. This method improves the success rate, efficiency, and automation of parallel hybrid power system switching and different modes, reduces the impact of switching between different modes on ship safety, and avoids the risk of the entire ship losing power and electricity.

[0007] The technical solution of the present invention is: an automatic parallel control method for a ship parallel hybrid power system, specifically including the following steps:

[0008] S1: Press the corresponding mode button to send a mode switching command and enter automatic parallel control;

[0009] The parallel hybrid power system of the ship includes a diesel engine propulsion mode and a PTI mode, wherein the switching is a conversion from diesel engine propulsion mode to PTI mode or a conversion from PTI mode to diesel engine propulsion mode.

[0010] S2: After receiving the corresponding mode switching command, check the working conditions, adjust the speed and torque of the objects to be combined, and check whether the conditions for parallel operation are met.

[0011] S3: If the corresponding paralleling and switching conditions are met, automatic paralleling synchronization control will be performed;

[0012] S4: If automatic paralleling and synchronization are completed, the corresponding clutches will be automatically engaged and disengaged, and load transfer control will be automatically performed after engagement and disengagement.

[0013] S5: If the load transfer is completed, the corresponding clutch that completed the load transfer will disengage, thus completing the mode switch.

[0014] Furthermore, the automatic parallel control method for switching from diesel engine propulsion mode to PTI mode is as follows: When switching from diesel engine propulsion mode to PTI mode, the parallel control system collects the real-time speed n of the diesel engine. D and load P D The parallel control system adjusts the diesel engine speed n in real time. D The speed command n for the PTI propulsion motor is calculated based on the speed ratio r between the PTI propulsion motor and the diesel engine. EC For n D *r sends to the PTI frequency converter; when the PTI frequency converter feeds back the actual speed n of the PTI propulsion motor within 25 seconds. E PTI speed command value n D At time *r, the speed of the PTI drive motor is synchronized with the speed on the PTI clutch gearbox side. At this time, the torque limit T of the PTI inverter is set. EC The current PTI propulsion motor torque feedback value T E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load impact when the PTI clutch of the PTI propulsion motor engages and disengages. A command to engage and disengage the PTI clutch of the PTI propulsion motor is then issued. Within 25 seconds, the PTI inverter feeds back the actual speed n of the PTI propulsion motor. E Failed to reach PTI speed command value n D *r, issues a collision failure alarm and automatically exits synchronous collision;

[0015] Upon receiving a TI clutch engagement / disengagement command, if the PTI clutch engagement / disengagement fails, a PTI clutch engagement / disengagement failure alarm and a parallel operation failure alarm will be issued, and parallel operation will be automatically disengaged. If the PTI clutch engagement / disengagement succeeds, the PTI inverter speed command n will be set. EC Set to n D *r(rpm)+10rpm, and control the torque limit T of the PTI inverter. EC Increase slowly until the real-time load P of the diesel engine is detected. DWhen the load is 0, the load is transferred from the diesel engine to the PTI propulsion motor; after the load transfer is completed, a command to disengage the diesel engine clutch is issued.

[0016] Upon receiving a diesel engine clutch disengagement command, if the diesel engine clutch disengagement fails, a diesel engine clutch disengagement failure alarm is issued, and the torque limit T of the PTI inverter is controlled. EC Slowly reduce to T1, disengage the PTI clutch, issue a paralleling failure alarm and automatically exit synchronous paralleling. If the diesel engine clutch is successfully disengaged, enter PTI mode and automatically exit paralleling.

[0017] Furthermore, the automatic parallel control method for switching from PTI mode to diesel engine propulsion mode is as follows: When switching from PTI mode to diesel engine propulsion mode, the parallel control system collects the real-time PTI speed n of the PTI inverter. E and PTI torque feedback value T E According to the real-time rotational speed n of PTI E The PTI propulsion motor and the diesel engine speed ratio r are used to calculate the diesel engine speed command n. DC For n E / r sends a signal to the diesel engine; if the diesel engine returns the actual speed n within 25 seconds... D The diesel engine speed command value n E At / r, the diesel engine speed is synchronized with the speed on the diesel engine clutch gearbox side. At this time, the torque limit T of the PTI inverter is set. EC The current PTI torque feedback value T E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load shock during PTI clutch engagement and disengagement. A diesel engine clutch engagement / disengagement command is issued. If the actual engine speed n is fed back by diesel engine 101 within 25 seconds... D Failed to reach the diesel engine speed command value n 101 E / r will issue a collision failure alarm and automatically exit the collision process;

[0018] Upon receiving a command to engage or disengage the diesel engine clutch, if engagement or disengagement fails, an alarm for diesel engine clutch engagement / disengagement failure and a paralleling failure alarm are issued, and paralleling is automatically disengaged; if diesel engine clutch engagement or disengagement succeeds, the torque limit T of the PTI inverter is controlled. EC The load is gradually reduced to 10%, and the load is transferred from the PTI propulsion motor to the diesel engine; after the load transfer is completed, a command to disengage the PTI clutch is issued.

[0019] Upon receiving the PTI clutch disengagement command, if the PTI clutch disengagement fails, a PTI clutch disengagement failure alarm is issued. The parallel control system controls the PTI propulsion motor to stop in an emergency, issues a parallel operation failure alarm, and automatically exits the parallel operation program. If the PTI clutch disengagement is successful, the system enters diesel engine propulsion mode and automatically exits the parallel operation.

[0020] Furthermore, the fault handling method during the automatic switching from diesel engine propulsion mode to PTI mode includes:

[0021] Before issuing the PTI clutch engagement command, if the following occurs: diesel engine failure shutdown, diesel engine failure speed reduction, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the diesel engine propulsion mode is maintained, a paralleling failure alarm is issued, and paralleling is automatically disengaged.

[0022] After the PTI clutch engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure deceleration, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure deceleration, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the parallel operation control system will control the PTI propulsion motor to stop urgently, issue a parallel operation failure alarm, and automatically exit parallel operation, maintaining the diesel engine propulsion mode.

[0023] Furthermore, the fault handling method during the automatic switching from PTI mode to diesel engine propulsion mode includes:

[0024] Before issuing the diesel engine clutch engagement command, if the following occurs: diesel engine failure shutdown, diesel engine failure speed reduction, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, maintain PTI mode, issue a paralleling failure alarm, and automatically exit paralleling.

[0025] After the diesel engine clutch engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure deceleration, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure deceleration, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the parallel control system will control the PTI propulsion motor to stop urgently, issue a paralleling failure alarm, automatically exit the synchronous paralleling program, and automatically switch to diesel engine propulsion mode.

[0026] The beneficial effects of the present invention are as follows: The automatic parallel control method for parallel hybrid power systems of ships of the present invention can fully realize automatic control, and improve the success rate, efficiency and automation of parallel hybrid power system parallel operation and switching between different modes, avoid the whole ship losing power and electricity, improve the safety of switching between different modes, and thus ensure the safe and reliable operation of parallel hybrid power ships. Attached Figure Description

[0027] Figure 1 This is a flowchart of the parallel control method for a marine hybrid power system according to the present invention;

[0028] Figure 2 This is a schematic diagram of the parallel hybrid power system for ships according to the present invention.

[0029] Figure 3 This is a schematic diagram of a parallel hybrid power system for ships in an embodiment of the present invention. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0031] like Figure 1 The flowchart shown is a method for parallel control of a marine hybrid power system. The method includes the following steps:

[0032] S1: Press the corresponding mode button to send a mode switching command and enter automatic parallel control;

[0033] The parallel hybrid power system of the ship includes a diesel engine propulsion mode and a PTI mode, wherein the PTI mode is the electric propulsion mode;

[0034] The switching is from diesel engine propulsion mode to PTI mode or from PTI mode to diesel engine propulsion mode;

[0035] S2: After receiving the corresponding mode switching command, check the working conditions, adjust the speed and torque of the objects to be combined, and check whether the conditions for parallel operation are met.

[0036] S3: If the corresponding paralleling and switching conditions are met, automatic paralleling synchronization control will be performed;

[0037] S4: If automatic paralleling and synchronization are completed, the corresponding clutches will be automatically engaged and disengaged, and load transfer control will be automatically performed after engagement and disengagement.

[0038] S5: If the load transfer is completed, the corresponding clutch that completed the load transfer will disengage, thus completing the mode switch.

[0039] like Figure 2 The diagram shown illustrates the parallel hybrid power system control principle for ships. Figure 1 The specific steps for the automatic parallel control method of switching from diesel engine propulsion mode to PTI mode are as follows:

[0040] When the diesel engine propulsion mode is switched to PTI mode, the parallel control system 001 collects the real-time speed n of the diesel engine 101. D and load PD The parallel control system 001 adjusts the real-time speed n of the diesel engine 101. D The speed command n for calculating the speed ratio r between the PTI propulsion motor 203 and the diesel engine 101 is given. EC For n D *r sends PTI frequency converter 202.

[0041] When the PTI inverter 202 feeds back the actual speed n of the PTI propulsion motor 203 within 25 seconds... E PTI speed command value n D At time *r, the speed of the PTI drive motor 203 is synchronized with the speed of the gearbox side of the PTI clutch 204. At this time, the torque limit T of the PTI inverter 202 is set. EC The current torque feedback value T of the PTI propulsion motor 203 E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load impact when the PTI clutch 204 of the PTI propulsion motor 203 engages or disengages. A command to engage or disengage the PTI clutch 204 of the PTI propulsion motor 203 is issued. Within 25 seconds, the PTI inverter 202 feeds back the actual speed n of the PTI propulsion motor 203. E Failed to reach PTI speed command value n D *r will issue a vehicle synchronization failure alarm and automatically exit the synchronization process.

[0042] If PTI clutch 204 engagement / disengagement fails, an alarm for PTI clutch 204 engagement / disengagement failure and a parallel operation failure will be issued, and the parallel operation program will be automatically exited. If PTI clutch 204 engagement / disengagement succeeds, the speed command n of PTI inverter 202 will be set. EC Set to n D *r+10, and control the torque limit T of PTI inverter 202. EC Increase slowly until the real-time load P of the diesel engine 101 is detected. D The load is 0, and the load is transferred from the diesel engine 101 to the PTI propulsion motor 203.

[0043] After the load transfer is completed, a command to disengage the diesel engine clutch 102 is issued.

[0044] If the diesel engine clutch 102 fails to disengage, an alarm for diesel engine clutch 102 disengagement failure will be issued, and the torque limit T of the PTI inverter 202 will be controlled. EC Slowly reduce to T1, disengage PTI clutch 204, issue a paralleling failure alarm and automatically exit the synchronous paralleling program. If diesel engine clutch 102 is successfully disengaged, enter PTI mode and automatically exit the paralleling program.

[0045] The steps for automatic lane-keeping control when switching from PTI mode to diesel engine propulsion mode are as follows:

[0046] When switching from PTI mode to diesel engine propulsion mode, the parallel control system collects the real-time PTI speed n from the PTI inverter 202. E and PTI torque feedback value T E According to the real-time rotational speed n of PTI E The speed command n for calculating the speed ratio r between the PTI propulsion motor 203 and the diesel engine 101 is given. DC For n E / r delivers diesel engine 101.

[0047] If the diesel engine 101 feedbacks the actual speed n within 25 seconds... D The diesel engine speed command value n E At / r, the speed of diesel engine 101 is synchronized with the speed on the gearbox side of diesel engine clutch 102. At this time, the torque limit T of PTI inverter 202 is set. EC The current PTI torque feedback value T E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load impact when the PTI clutch 204 engages or disengages. A command to engage or disengage the diesel engine clutch 102 is issued. If the diesel engine 101 returns the actual speed n within 25 seconds... D Failed to reach the diesel engine speed command value n 101 E / r will issue a lane-keeping failure alarm and automatically exit the lane-keeping program.

[0048] If the diesel engine clutch 102 fails to engage or disengage, an alarm for diesel engine clutch engagement / disengagement failure and a parallel operation failure will be issued, and the parallel operation program will be automatically terminated. If the diesel engine clutch 102 successfully engages or disengages, the torque limit T of the PTI inverter 202 will be controlled. EC The load is gradually reduced to 10%, and the load is transferred from the PTI propulsion motor 203 to the diesel engine 101.

[0049] After the load transfer is completed, the PTI clutch 204 disengagement command is issued.

[0050] If the PTI clutch 204 fails to disengage, an alarm for PTI clutch 204 disengagement failure will be issued. The parallel control system will control the PTI propulsion motor 203 to stop in an emergency, issue a paralleling failure alarm, and automatically exit the paralleling program. If the PTI clutch 204 successfully disengages, the system will enter diesel engine propulsion mode and automatically exit the paralleling program.

[0051] During automatic parallel operation when switching from diesel engine propulsion mode to PTI mode, the system can automatically exit the parallel operation program in case of a related fault, protecting the safe operation of the equipment, including:

[0052] Before issuing the PTI clutch 204 engagement command, if the following occurs: diesel engine failure shutdown, diesel engine 101 failure speed reduction, diesel engine clutch 102 failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch 204 failure disengagement request alarm, the diesel engine propulsion mode is maintained, a paralleling failure alarm is issued, and the paralleling procedure is automatically exited.

[0053] After the PTI clutch 204 engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure speed reduction, diesel engine clutch 102 failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch 204 failure disengagement request alarm, the parallel control system will control the PTI propulsion motor to stop urgently, issue a paralleling failure alarm, and automatically exit the paralleling program, maintaining the diesel engine propulsion mode.

[0054] During the automatic parallel operation when switching from PTI mode to diesel engine propulsion mode, the system can automatically exit the parallel operation program in case of a related fault, protecting the safe operation of the equipment, including:

[0055] Before issuing the diesel engine clutch engagement command, if the following occurs: diesel engine failure shutdown, diesel engine 101 failure speed reduction, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch 204 failure disengagement request alarm, the PTI mode is maintained, a paralleling failure alarm is issued, and the paralleling procedure is automatically exited.

[0056] After the diesel engine clutch 102 engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure deceleration, diesel engine clutch 102 failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure deceleration, PTI propulsion motor power limit alarm, or PTI clutch 204 failure disengagement request alarm, the parallel control system controls the PTI propulsion motor to stop urgently, issues a paralleling failure alarm, automatically exits the synchronous paralleling program, and automatically switches to diesel engine propulsion mode.

[0057] The diesel engine speed control method is closed-loop speed control, and it can receive external speed command signals.

[0058] The PTI frequency converter is controlled by a closed-loop speed control system and can receive external speed command signals and external torque limit signals.

[0059] The PTI frequency converter can provide real-time speed and torque signals.

[0060] The diesel engine and PTI propulsion motor are both equipped with controllable clutches between themselves and the gearbox.

[0061] like Figure 3 This is a schematic diagram of a parallel hybrid power system for a ship, as described in an embodiment of the present invention. This example of a parallel hybrid power system includes a diesel engine 101 with an idle speed of 400 rpm, a rated speed of 1100 rpm, and a rated power of 8200 kW; a diesel engine clutch 102; an AC distribution board 201; a PTI frequency converter 202; a PTI propulsion motor 203 with a rated speed of 1500 rpm and a rated power of 1000 kW; a PTI clutch 204; a gearbox 301; and a propeller 401. The reduction ratio between the diesel engine and the propeller is 4.381, and the reduction ratio between the PTI propeller motor and the propeller is 12. Therefore, during parallel operation, the speed ratio r between the PTI propeller motor 203 and the diesel engine 101 is r = 12 / 4.381 = 2.739.

[0062] When only the diesel engine clutch 102 is engaged, the diesel engine 101 transmits power to the propeller 401 through the gearbox 301. This mode is defined as the diesel engine propulsion mode.

[0063] When only the PTI clutch 204 is engaged, the PTI propulsion motor 203 transmits power to the propeller 401 through the gearbox 301. This mode is defined as PTI mode.

[0064] When the diesel engine clutch 102 and the PTI clutch 204 are engaged simultaneously, the diesel engine 101 and the PTI propulsion motor 203 simultaneously transmit power to the propeller 401 through the gearbox 301. This operating condition is called parallel operation.

[0065] Combined with appendix Figure 3 See appendix Figure 2 The present invention will be described in detail below:

[0066] For example, if the current operating mode is diesel engine propulsion mode, the parallel control process steps when switching to PTI mode are as follows:

[0067] The parallel control system 001 receives an external command 111 to switch to PTI mode.

[0068] The parallel control system 001 automatically determines whether the conditions for entering PTI mode are met, specifically including: remote control of diesel engine 101, remote control of PTI inverter 202, operation of diesel engine 101, operation of PTI inverter 202, engagement and disengagement of diesel engine clutch 102, and diesel engine 101 speed n. DWhen the speed is less than 450 rpm, PTI clutch 204 is ready. There is no pre-alarm for diesel engine 101 failure speed reduction, failure speed reduction, failure stop pre-alarm, or failure stop. There is no pre-alarm for PTI inverter 202 or PTI propulsion motor 203 failure speed reduction, failure speed reduction, failure stop pre-alarm, or failure stop.

[0069] For example, if the above conditions for entering PTI mode are not met, the vehicle will automatically exit the paralleling program and issue a paralleling failure alarm.

[0070] For example, if the above-mentioned conditions for entering PTI mode are met, the parallel control system 001 adjusts the speed n of the diesel engine 101 in real time. D The PTI speed command n is calculated based on the speed ratio r between the PTI propulsion motor and the diesel engine. EC For n D *r, and at the same time, the parallel control system 001 starts timing.

[0071] For example, when the parallel control system 001 detects the actual speed n fed back by the PTI inverter 202 within 25 seconds... E PTI speed command value n D When *r is reached, synchronization is completed. At this time, the parallel control system 001 sets the torque limit T of the PTI inverter 202. EC Set to the current PTI torque feedback value T E This torque value is temporarily stored and marked as T1 to avoid load impact when the PTI clutch 204 is engaged.

[0072] For example, when the parallel control system 001 detects the actual speed n fed back by the PTI inverter 202 within 25 seconds... E Failed to reach PTI speed command value n D *r will issue a vehicle synchronization failure alarm and automatically exit the synchronization process.

[0073] After synchronization is completed, the parallel control system 001 issues a command to engage / disengage the PTI clutch 204.

[0074] For example, if the PTI clutch 204 fails to engage or disengage, a PTI clutch engagement / disengagement failure alarm and a paralleling failure alarm will be issued, and the paralleling procedure will be automatically terminated.

[0075] For example, if the PTI clutch 204 engages successfully, the parallel control system 001 will send a PTI speed command to n. EC Set to n D *r(rpm)+10rpm, and control the torque limit T of PTI inverter 202. EC Increase slowly until the diesel engine reaches a load of 101P. D If the value is 0, the load transfer is complete.

[0076] After the load transfer is completed, the parallel control system 001 issues a command to disengage the diesel engine clutch 102.

[0077] For example, if the diesel engine clutch 102 fails to disengage, an alarm for diesel engine clutch 102 disengagement failure is issued, and the parallel control system 001 controls the torque limit T of the PTI inverter 202. EC Slowly reduce to T1, disengage PTI clutch 204, issue a paralleling failure alarm, and automatically exit the synchronization paralleling program.

[0078] For example, if the diesel engine clutch 102 successfully disengages, it enters PTI mode and automatically exits the synchronization and paralleling program.

[0079] For example, if the current operating mode is PTI mode, the parallel control process steps when switching to diesel engine propulsion mode are as follows:

[0080] The parallel control system 001 receives an external command 111 to switch to diesel engine propulsion mode.

[0081] The parallel control system 001 automatically determines whether the conditions for entering diesel engine mode are met, specifically including: remote control of diesel engine 101, remote control of PTI inverter 202, diesel engine 101 running, PTI inverter 202 running, diesel engine clutch 102 disengaging, and PTI inverter 202 speed n. E Between 1096rpm and 1200rpm (based on the speed ratio r between the PTI propulsion motor and the diesel engine, when paralleling, the PTI propulsion motor at 1096rpm corresponds to the diesel engine idle speed of 400rpm), the diesel engine clutch 102 is ready, and there are no pre-alarms for diesel engine 101 failure speed reduction, failure speed reduction, failure stop, or failure stop, nor are there pre-alarms for PTI inverter 202 or PTI propulsion motor 203 failure speed reduction, failure speed reduction, failure stop, or failure stop.

[0082] For example, if the above-mentioned conditions for entering the diesel engine propulsion mode are not met, the automatic paralleling program will automatically exit and a failure alarm will be issued.

[0083] For example, if the above-mentioned conditions for entering the diesel engine propulsion mode are met, the parallel control system 001 adjusts the real-time speed n based on the PTI inverter 202. E The diesel engine speed is calculated using the gearbox speed ratio r, and command n is used to calculate the speed. DC For n E / r. Simultaneously, the parallel control system 001 begins timing.

[0084] For example, if the parallel control system 001 detects the actual speed n of the diesel engine 101 within 25 seconds... D For the speed command value nE / r, synchronization is completed. At this time, the parallel control system 001 controls the torque limit T of the PTI inverter 202. EC Set to the current PTI torque feedback value T E This torque value is temporarily stored in the parallel control system 001 and marked as T1 to avoid load impact when the PTI clutch engages or disengages.

[0085] For example, if the parallel control system 001 detects the actual speed n fed back by the diesel engine 101 within 25 seconds... D Failed to reach the diesel engine speed command value n 101 E / r will issue a vehicle synchronization failure alarm and automatically exit the synchronization process.

[0086] After synchronization is completed, the parallel control system 001 issues a command to engage the diesel engine clutch 102.

[0087] For example, if the diesel engine clutch 102 fails to engage or disengage, an alarm for failure of engagement or disengagement of diesel engine clutch 102 and an alarm for failure of parallel operation are issued, and the synchronization and parallel operation program is automatically terminated.

[0088] For example, if the diesel engine clutch 102 is successfully engaged, the parallel control system 001 controls the torque limit T of the PTI inverter 202. EC Slowly reduce to 10%, transferring the load from PTI propulsion motor 203 to diesel engine 101.

[0089] After the load transfer is completed, the parallel control system 001 issues a disengagement command to the PTI clutch 204.

[0090] For example, if the PTI clutch 204 fails to disengage, a PTI clutch 204 disengagement failure alarm is issued, the PTI inverter 202 is controlled to stop in an emergency, a paralleling failure alarm is issued, and the paralleling program is automatically exited.

[0091] For example, if the PTI clutch 204 successfully disengages, the system enters diesel engine propulsion mode and automatically exits the synchronization and paralleling procedure.

[0092] For example, the parallel operation control method of the present invention has certain safety protection measures. When automatically synchronizing parallel operation during the transition from diesel engine propulsion mode to PTI mode, it can automatically exit the parallel operation program when a related fault occurs, thus protecting the safe operation of the equipment.

[0093] Before issuing the PTI clutch 204 engagement command, if the following occurs in the parallel control system 001: diesel engine 101 malfunctions and stops or decelerates; diesel engine clutch 102 malfunctions and disengages and requests an alarm; PTI inverter 202 or PTI propulsion motor 203 malfunctions and stops, decelerates or power limits and requests an alarm; or PTI clutch 204 malfunctions and requests an alarm, the system will maintain the diesel engine propulsion mode, issue a paralleling failure alarm, and automatically exit the synchronous paralleling program.

[0094] After the PTI clutch 204 engagement command is issued, if the diesel engine 101 fails to stop or slow down, the diesel engine clutch 102 fails to disengage and requests an alarm, or the PTI inverter 202 or PTI propulsion motor 203 fails to stop, slows down, or has a power limit alarm, or the PTI clutch 204 fails to disengage and requests an alarm, the PTI inverter 202 is controlled to stop in an emergency, a paralleling failure alarm is issued, and the synchronization paralleling program is automatically exited, maintaining the diesel engine propulsion mode.

[0095] For example, the parallel operation control method of the present invention has certain safety protection measures. When automatically synchronizing parallel operation during the transition from PTI mode to diesel engine propulsion mode, it can automatically exit the parallel operation program when a related fault occurs, thus protecting the safe operation of the equipment.

[0096] Before issuing the command to engage the diesel engine clutch 102, the parallel control system 001 may experience a fault-induced stop or speed reduction in diesel engine 101, a fault-induced disengagement alarm in diesel engine clutch 102, or a fault-induced stop, speed reduction, or power limitation alarm in PTI inverter 202 or PTI propulsion motor 203. If a fault-induced disengagement alarm is triggered by PTI clutch 204, the system will maintain PTI mode, issue a paralleling failure alarm, and automatically exit the synchronous paralleling procedure.

[0097] After the diesel engine clutch 102 engagement command is issued, if the diesel engine 101 malfunctions and stops or slows down, or if the diesel engine clutch 102 malfunctions and disengages, an alarm will be triggered. If the PTI inverter 202 or PTI propulsion motor 203 malfunctions and stops, slows down, or experiences a power limitation alarm, or if an alarm is triggered, and the PTI clutch 204 malfunctions and disengages, the PTI inverter 202 will be controlled to perform an emergency free stop, a paralleling failure alarm will be issued, and the synchronization paralleling program will be automatically exited, automatically switching to diesel engine propulsion mode.

[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An automatic parallel control method for a marine parallel hybrid power system, characterized in that, Specifically, the steps include the following: S1: Press the corresponding mode button to send a mode switching command and enter automatic parallel control; The parallel hybrid power system of the ship includes a diesel engine propulsion mode and a PTI mode, wherein the switching is a conversion from diesel engine propulsion mode to PTI mode or a conversion from PTI mode to diesel engine propulsion mode. S2: After receiving the corresponding mode switching command, check the working conditions, adjust the speed and torque of the objects to be combined, and check whether the conditions for parallel operation are met. S3: If the corresponding paralleling and switching conditions are met, automatic paralleling synchronization control will be performed; S4: If automatic paralleling and synchronization are completed, the corresponding clutches will be automatically engaged and disengaged, and load transfer control will be automatically performed after engagement and disengagement. S5: If the load transfer is completed, control the corresponding clutch to disengage and complete the mode switch; The automatic parallel control method for switching from diesel engine propulsion mode to PTI mode is as follows: When the diesel engine propulsion mode switches to PTI mode, the parallel control system collects the real-time speed n of the diesel engine. D and load P D The parallel control system adjusts the diesel engine speed n in real time. D The speed command n for the PTI propulsion motor is calculated based on the speed ratio r between the PTI propulsion motor and the diesel engine. EC n EC =n D r, rotation speed command n EC The signal is sent to the PTI inverter; within 25 seconds, the PTI inverter will provide feedback on the actual speed n of the PTI propulsion motor. E PTI speed command value n D At time r, the speed of the PTI drive motor is synchronized with the speed on the PTI clutch gearbox side. At this time, the torque limit T of the PTI inverter is set. EC The current PTI torque feedback value T E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load impact when the PTI clutch of the PTI propulsion motor engages and disengages. A command to engage and disengage the PTI clutch of the PTI propulsion motor is then issued. Within 25 seconds, the PTI inverter feeds back the actual speed n of the PTI propulsion motor. E Failed to reach PTI speed command value n D r, issues a paralleling failure alarm and automatically exits synchronous paralleling; Upon receiving a PTI clutch engagement / disengagement command, if the PTI clutch engagement / disengagement fails, a PTI clutch engagement / disengagement failure alarm and a parallel operation failure alarm will be issued, and parallel operation will be automatically disengaged. If the PTI clutch engagement / disengagement succeeds, the PTI inverter speed command n will be set. EC Set to n D r+10, in rpm, and controls the torque limit T of the PTI inverter. EC Increase slowly until the real-time load P of the diesel engine is detected. D When the load is 0, the load is transferred from the diesel engine to the PTI propulsion motor; after the load transfer is completed, a command to disengage the diesel engine clutch is issued. Upon receiving the diesel clutch disengaging command, if the diesel clutch disengaging fails, a diesel clutch disengaging failure alarm is sent, and the torque limit value T of the PTI frequency converter is controlled EC Slowly reduces to T1, disengages the PTI clutch, sends a parallel failure alarm and automatically exits the synchronous parallel, if the diesel clutch disengaging succeeds, enters the PTI mode, and automatically exits the parallel.

2. An automatic parallel control method for a marine parallel hybrid power system, characterized in that, Specifically, the steps include the following: S1: Press the corresponding mode button to send a mode switching command and enter automatic parallel control; The parallel hybrid power system of the ship includes a diesel engine propulsion mode and a PTI mode, wherein the switching is a conversion from diesel engine propulsion mode to PTI mode or a conversion from PTI mode to diesel engine propulsion mode. S2: After receiving the corresponding mode switching command, check the working conditions, adjust the speed and torque of the objects to be combined, and check whether the conditions for parallel operation are met. S3: If the corresponding paralleling and switching conditions are met, automatic paralleling synchronization control will be performed; S4: If automatic paralleling and synchronization are completed, the corresponding clutches will be automatically engaged and disengaged, and load transfer control will be automatically performed after engagement and disengagement. S5: If the load transfer is completed, control the corresponding clutch to disengage and complete the mode switch; The automatic parallel control method for switching from PTI mode to diesel engine propulsion mode is as follows: When switching from PTI mode to diesel engine propulsion mode, the parallel control system collects the real-time PTI speed n of the PTI inverter. E and PTI torque feedback value T E According to the real-time rotational speed n of PTI E The PTI propulsion motor and the diesel engine speed ratio r are used to calculate the diesel engine speed command n. DC n DC =n E / r, rotation speed command n DC Send to the diesel engine; if the diesel engine returns the actual speed n within 25 seconds. D The diesel engine speed command value n E At / r, the diesel engine speed is synchronized with the speed on the diesel engine clutch gearbox side. At this time, the torque limit T of the PTI inverter is set. EC The current PTI torque feedback value T E This torque value is temporarily stored in the parallel control system and marked as T1 to avoid load shock during PTI clutch engagement and disengagement. A diesel engine clutch engagement / disengagement command is then issued. If the actual diesel engine speed n is fed back within 25 seconds... D Diesel engine speed command value n not reached E / r will issue a collision failure alarm and automatically exit the collision process; Upon receiving a command to engage or disengage the diesel engine clutch, if engagement or disengagement fails, an alarm for diesel engine clutch engagement / disengagement failure and a paralleling failure alarm are issued, and paralleling is automatically disengaged; if diesel engine clutch engagement or disengagement succeeds, the torque limit T of the PTI inverter is controlled. EC Slowly reduce the load until it reaches 10% of the torque limit, at which point the load is transferred from the PTI propulsion motor to the diesel engine; after the load transfer is complete, issue a command to disengage the PTI clutch. Upon receiving the PTI clutch disengagement command, if the PTI clutch disengagement fails, a PTI clutch disengagement failure alarm is issued. The parallel control system controls the PTI propulsion motor to stop in an emergency, issues a parallel operation failure alarm, and automatically exits the parallel operation program. If the PTI clutch disengagement is successful, the system enters diesel engine propulsion mode and automatically exits the parallel operation.

3. The automatic parallel control method for a ship parallel hybrid power system according to claim 1, characterized in that, The fault handling method during the automatic switching from diesel engine propulsion mode to PTI mode includes: Before issuing the PTI clutch engagement command, if the following occurs: diesel engine failure shutdown, diesel engine failure speed reduction, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the diesel engine propulsion mode is maintained, a paralleling failure alarm is issued, and paralleling is automatically disengaged. After the PTI clutch engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure deceleration, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure deceleration, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the parallel operation control system will control the PTI propulsion motor to stop urgently, issue a parallel operation failure alarm, and automatically exit parallel operation, maintaining the diesel engine propulsion mode.

4. The automatic parallel control method for a ship parallel hybrid power system according to claim 2, characterized in that, The fault handling method during the automatic switching from PTI mode to diesel engine propulsion mode includes: Before issuing the diesel engine clutch engagement command, if the following occurs: diesel engine failure shutdown, diesel engine failure speed reduction, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure speed reduction, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, maintain PTI mode, issue a paralleling failure alarm, and automatically exit paralleling. After the diesel engine clutch engagement command is issued, if the following occurs: diesel engine failure shutdown, diesel engine failure deceleration, diesel engine clutch failure disengagement request alarm, PTI propulsion motor failure shutdown, PTI propulsion motor failure deceleration, PTI propulsion motor power limit alarm, or PTI clutch failure disengagement request alarm, the parallel control system will control the PTI propulsion motor to stop urgently, issue a paralleling failure alarm, automatically exit the synchronous paralleling program, and automatically switch to diesel engine propulsion mode.

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