CN109591995B - Power device with PTO shaft and generator based on diesel-diesel combined propulsion and parallel operation method - Google Patents

Power device with PTO shaft and generator based on diesel-diesel combined propulsion and parallel operation method Download PDF

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Publication number
CN109591995B
CN109591995B CN201710924763.9A CN201710924763A CN109591995B CN 109591995 B CN109591995 B CN 109591995B CN 201710924763 A CN201710924763 A CN 201710924763A CN 109591995 B CN109591995 B CN 109591995B
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diesel engine
power
current
rotating speed
diesel
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CN109591995A (en
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卑雨潇
周庆波
申卿
胡军
谭琨
董新宇
赵清康
彭云霞
苏晓明
赵同宾
邱爱华
刘张超
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Shanghai Qiyao Heavy Industry Co ltd
711th Research Institute of CSIC
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Shanghai Qiyao Heavy Industry Co ltd
711th Research Institute of CSIC
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • B63H23/10—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit
    • B63H23/12—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit allowing combined use of the propulsion power units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B63H2021/216—Control means for engine or transmission, specially adapted for use on marine vessels using electric control means

Abstract

The invention discloses a power device with a PTO shaft generator based on diesel engine and diesel engine combined propulsion, which comprises a first diesel engine, a second diesel engine, a first diesel engine electric control system, a second diesel engine electric control system, a gear box control mechanism, a PTO shaft generator and a combined engine control device. The output ends of the first diesel engine and the second diesel engine are respectively connected with a first input shaft and a second input shaft of the gear box, the output end of the PTO shaft with the generator is connected with a first output shaft of the gear box, and a second output shaft of the gear box is connected with a propeller shaft of the ship; and the parallel operation control device is respectively in communication connection with the first diesel engine electric control system, the second diesel engine electric control system and the gear box control mechanism. The invention also discloses a method for realizing automatic parallel operation of the diesel engine with the PTO shaft and the generator. The invention can realize that the diesel engines with PTO shafts and generators are automatically controlled to complete parallel operation, thereby realizing that the double diesel engines are parallel operated to push the propeller to sail.

Description

Power device with PTO shaft and generator based on diesel-diesel combined propulsion and parallel operation method
Technical Field
The invention relates to a ship power device technology.
Background
The combined propulsion power device for firewood and firewood is produced in the later 60 th of the 20 th century, and the combined propulsion power device for firewood and firewood is widely applied along with the continuous development of the automatic control technology because the control technology is relatively lagged and slow in development. A firewood and diesel vehicle combined propulsion power device relates to a plurality of technical fields of engines, automatic control, electricity, hydraulic pressure, mechanical transmission and the like, and the control is relatively complex. The research of the domestic diesel-diesel combined-vehicle combined propulsion power device starts late, while the diesel-diesel combined-vehicle combined propulsion power device with the PTO shaft and the generator is still in the initial exploration stage, and the verification of a real ship is relatively less. The problem how to realize that the double diesel engines are combined to push the propeller to sail and the PTO shaft is provided with the generator is particularly difficult, and corresponding actual ship application is not found at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a power device with a PTO shaft and a generator based on diesel engine and diesel engine combined propulsion, which can automatically control a diesel engine with a PTO shaft and a generator to complete the combined operation, thereby realizing the purpose that the double diesel engines are combined to drive a propeller to sail.
The invention aims to solve the technical problem of providing a method for realizing automatic parallel operation of a diesel engine with a PTO shaft and a generator.
In order to solve the technical problems, the invention adopts the following technical scheme:
a power device with a PTO shaft and a generator based on diesel and diesel combined propulsion comprises a first diesel engine, a second diesel engine, a first diesel engine electric control system, a second diesel engine electric control system, a gear box control mechanism for controlling the connection and the disconnection of the gear box, the PTO shaft and the generator and a combined control device; the output end of the first diesel engine is connected with a first input shaft of the gearbox, the output end of the second diesel engine is connected with a second input shaft of the gearbox, the output end of the PTO shaft with the generator is connected with a first output shaft of the gearbox, and a second output shaft of the gearbox is connected with a propeller shaft of the ship; the parallel operation control device is respectively in communication connection with the first diesel engine electric control system, the second diesel engine electric control system and the gear box control mechanism and is used for controlling the rotating speed of the first diesel engine through the first diesel engine electric control system, controlling the rotating speed of the second diesel engine through the second diesel engine electric control system, controlling the connection, the disconnection and the disconnection of the gear box through the gear box control mechanism and receiving a rotating speed signal and an output power signal of the first diesel engine fed back by the first diesel engine electric control system, a rotating speed signal and an output power signal of the second diesel engine fed back by the second diesel engine electric control system and the connection, the disconnection and the disconnection state fed back by the gear box control mechanism.
The invention also discloses a method for realizing automatic parallel operation of the diesel engine with the PTO shaft and the generator, which comprises the following steps:
after receiving a parallel operation control command input from the outside, the parallel operation control device judges whether the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine according to the received rotating speed signal of the first diesel engine and the rotating speed signal of the second diesel engine; the first diesel engine drives the propeller shaft to rotate and drives the PTO shaft to drive the generator to operate in a PTO mode;
if the rotating speed of the second diesel engine is not synchronous with the rotating speed of the first diesel engine, the parallel operation control device controls the rotating speed of the second diesel engine through the second diesel engine electric control system and/or controls the rotating speed of the first diesel engine through the first diesel engine electric control system until the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine;
after the rotating speed of the second diesel engine is synchronous with that of the first diesel engine, the parallel operation control device controls the second diesel engine clutch of the gear box to be connected and arranged through the gear box control mechanism, so that the torque output by the second diesel engine is transmitted to the propeller shaft;
the parallel operation control device generates power according to the rated power X1 of the first diesel engine, the rated power X2 of the second diesel engine, the rated received power load X3 of the propeller and the PTO shaftThe method comprises the steps that a power distribution mode is determined by the rated power load X4 of the engine, the transmission efficiency eta 1 of a propeller shaft system, the efficiency eta 2 of a PTO shaft with a generator, the lowest oil consumption power X5 under the rated rotating speed of a first diesel engine and the lowest oil consumption power X6 under the rated rotating speed of a second diesel engine, wherein if X1 is not less than X3/eta 1+ X4/eta 2 is not less than X1+ X2, and X3/eta 1+ X4/eta 2 is not less than X5+ X6, the mode of distributing power in proportion is determined, namely after a clutch of the second diesel engine of a gear box is successfully connected and arranged, the output power X4 of the first diesel engine is enabled to be output after the1 Current ofTo achieve
Figure BDA0001427392730000021
And the output power X of the second diesel engine2 current ofTo achieve
Figure BDA0001427392730000022
If X1 is not less than X3/eta 1+ X4/eta 2 is not less than X1+ X2 and X3/eta 1+ X4/eta 2 is less than X5+ X6, determining to adopt a power distribution mode which enables the second diesel engine to work at the rated rotating speed with the lowest oil consumption power, namely enabling the output power X of the first diesel engine to be X after the second diesel engine clutch of the gear box is successfully connected and discharged1 Current ofReaching X3/. eta.1 + X4/. eta.2-X6, and making the output power of the second diesel engine X2 current ofTo X6;
the parallel operation control device controls the output power X of the first diesel engine according to the determined power distribution mode based on the received output power signal of the first diesel engine fed back by the first diesel engine electric control system and the output power signal of the second diesel engine fed back by the second diesel engine electric control system1 Current ofAnd the output power X of the second diesel engine2 current of。
After the technical scheme is adopted, the invention has the following advantages:
1. the power device based on the diesel and diesel combined propulsion and provided with the PTO shaft generator can automatically control the diesel engine provided with the PTO shaft generator to complete the combined operation, so that two diesel engine hosts run in parallel to drive a same shaft system propeller together, the output power of a driving shaft system is improved, and the maneuverability of a ship power system is further improved;
2. the invention fully considers the technical characteristics and performance parameters of the diesel engine and the PTO shaft driven generator and sets a proper power distribution mode. When X3/eta 1+ X4/eta 2 is larger than or equal to X5+ X6, the fact that X3/eta 1+ X4/eta 2 is larger, the actual consumption efficiency of the propeller and the PTO shaft generator is close to X1+ X2, and at the moment, a mode of distributing power in proportion is adopted, so that the first diesel engine and the second diesel engine are close to the optimal working condition point to work, and the working efficiency of the power device can be improved; when X3/eta 1+ X4/eta 2 is less than X5+ X6, it is shown that X3/eta 1+ X4/eta 2 is smaller, and the actual consumption efficiency of the propeller and the PTO shaft with the generator is low, at this time, a power distribution mode which enables the second diesel engine to work at the rated rotating speed and consumes the lowest power of oil is adopted, so that the main engine of the diesel engine with low power preferentially reaches the optimal working condition point, and the first diesel engine is not too low in power, so that the working efficiency is influenced.
Drawings
Fig. 1 is a schematic diagram of one embodiment of a diesel-diesel hybrid based combined propulsion power plant with a PTO shaft generator according to the present invention.
Fig. 2 is a schematic view of a gearbox of an embodiment of a power plant based on a diesel-diesel combined propulsion with a PTO shaft with a generator according to the invention.
Fig. 3 is a schematic diagram of a parallel operation control device based on an embodiment of a diesel-diesel parallel operation combined propulsion power device with a PTO shaft and a generator according to the invention.
Fig. 4 shows a flow diagram of a method for implementing automatic merge of a diesel engine with a PTO shaft with a generator according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Please refer to fig. 1. The power device based on the diesel-diesel combined propulsion power generator with the PTO shaft comprises a first diesel engine 11, a second diesel engine 12, a first diesel engine electric control system 13, a second diesel engine electric control system 14, a gearbox 21, a gearbox control mechanism 22 for controlling the connection and disconnection of the gearbox 21, the PTO shaft power generator 3 and a combined vehicle control device 5.
The output end of the first diesel engine 11 is connected to the first input shaft 211 of the gear box 21, the output end of the second diesel engine 12 is connected to the second input shaft 212 of the gear box 21, the output end of the PTO shaft generator 3 is connected to the first output shaft 213 of the gear box 21, and the second output shaft 214 of the gear box 21 is connected to the propeller shaft 6 of the ship.
The internal structure of the gear case 21 is shown in fig. 2. It comprises a first input shaft 211, a second input shaft 212, a first output shaft 213, a second output shaft 214, a first diesel clutch 215, a second diesel clutch 216, a PTO clutch 217. Before parallel operation, the first diesel engine clutch 215 is connected and arranged, the second diesel engine clutch 216 is disconnected and the PTO clutch 217 is connected and arranged, the first diesel engine 11 drives the propeller shaft 6 to rotate, and the PTO shaft drives the generator 3 to be in a PTO working mode; after the parallel operation, the first diesel engine clutch 215 is connected in parallel, the second diesel engine clutch 216 is connected in parallel, and the PTO clutch 217 is connected in parallel, so that the first diesel engine 11 and the second diesel engine 12 jointly drive the propeller shaft 6 to rotate, and the PTO shaft and the generator 3 are in a PTO working mode.
The first diesel clutch 215, the second diesel clutch 216 and the PTO clutch 217 are preferably hydraulically driven clutches, and the gearbox control mechanism 22 may control the engagement and disengagement of the first diesel clutch 215, the second diesel clutch 216 and the PTO clutch 217.
The parallel operation control device 5 is respectively in communication connection with the first diesel engine electric control system 13, the second diesel engine electric control system 14 and the gear box control mechanism 22, and is used for controlling the rotating speed of the first diesel engine 11 through the first diesel engine electric control system 13, controlling the rotating speed of the second diesel engine 12 through the second diesel engine electric control system 14, controlling the connection and disconnection of the gear box 21 through the gear box control mechanism 22, and receiving a rotating speed signal and an output power signal of the first diesel engine 11 fed back by the first diesel engine electric control system 13, a rotating speed signal and an output power signal of the second diesel engine 12 fed back by the second diesel engine electric control system 14, and a connection, disconnection and disconnection state fed back by the gear box control mechanism 22. The parallel operation control device 5 can adopt a singlechip.
Please refer to fig. 3. In the present embodiment, the rated power of the first diesel engine 11 is equal to or higher than the rated power of the second diesel engine 12; the parallel operation control device 5 includes a bank control module 51, a power distribution mode determination module 52, a first power distribution module 53, and a second power distribution module 54.
The connecting and discharging control module 51 is configured to control the rotation speed of the second diesel engine 12 through the second diesel engine electronic control system 14 and/or control the rotation speed of the first diesel engine 11 through the first diesel engine electronic control system 13 based on the received rotation speed signal of the first diesel engine 11 and the rotation speed signal of the second diesel engine 12 according to an externally input parallel operation control instruction, so that the rotation speed of the second diesel engine 12 is synchronized with the rotation speed of the first diesel engine 11, and after the rotation speed of the second diesel engine 12 is synchronized with the rotation speed of the first diesel engine 11, the connecting and discharging control module controls the second diesel engine clutch 216 of the gear box 21 through the gear box control mechanism 22, so that the torque output by the second diesel engine 12 is transmitted to the propeller shaft 6. When the rotation speed of the first diesel engine 11 is not synchronous with the rotation speed of the second diesel engine 12, specifically, adjusting the rotation speed of the first diesel engine 11 or the rotation speed of the second diesel engine 12 to synchronize the two engines is based on a previous setting, and in order to synchronize the rotation speeds of the two engines, the rotation speed of the first diesel engine 11 or the rotation speed of the second diesel engine 12 may be adjusted, or the rotation speed of the first diesel engine 11 and the rotation speed of the second diesel engine 12 may be adjusted at the same time.
The power distribution mode determination module 52 is used for determining a power distribution mode according to a rated power X1 of the first diesel engine 11, a rated power X2 of the second diesel engine 12, a rated received power load X3 of the propeller, a rated power load X4 of the PTO shaft generator 3, a transmission efficiency eta 1 of the propeller shaft system, an efficiency eta 2 of the PTO shaft generator 3, a minimum fuel consumption power X5 at a rated rotating speed of the first diesel engine 11 and a minimum fuel consumption power X6 at a rated rotating speed of the second diesel engine 12, wherein if X1 is less than or equal to X3/eta 1+ X4/eta 2 is less than or equal to X1+ X2, and X3/eta 1+ X4/eta 2 is more than or equal to X5+ X6, the first power distribution unit 53 determines that the output powers of the first diesel engine 11 and the second diesel engine 12 are distributed and adjusted, if X1 is less than or equal to X3/eta 1+ X4/eta 2X 1+ X2, and X2/eta 8656/eta 8653 is less than or equal to X868427, it is determined that the output powers of the first diesel engine 11 and the second diesel engine 12 are division-adjusted by the second power division unit 54. The first 11 and second 12 diesel engines operate with the lowest power consumption at the rated speed, the combustion efficiency of the diesel engines being optimal and fuel being saved, beyond which the combustion efficiency drops.
The first power distribution module 53 is used for enabling the output power X of the first diesel engine after the second diesel engine clutch of the gearbox is successfully connected and arranged1 Current ofTo achieve
Figure BDA0001427392730000061
And the output power X of the second diesel engine2 current ofTo achieve
Figure BDA0001427392730000062
In the present embodiment, the first power distribution module 53 is used for controlling the output power X of the first diesel engine through the PID algorithm1 Current ofAnd the output power X of the second diesel engine2 current ofIf the allocation of (5) is realized within the preset time t1 | -X1/X2-X1 Current of/X2 current of| ≦ S1, the first power allocating module 53 outputs a merge success status signal to the outside, and if the | X1/X2-X cannot be realized within the preset time t11 Current of/X2 current of| is not greater than S1, the first power allocation module 53 outputs an alarm signal to the outside. 3% to 8% of S1, preferably 5% of S1.
The second power distribution module 54 is used for enabling the output power X of the first diesel engine after the second diesel engine clutch of the gearbox is successfully connected and arranged1 Current ofReaching X3/. eta.1 + X4/. eta.2-X6, and making the output power of the second diesel engine X2 current ofX6 was reached. In the present embodiment, the second power distribution module 54 is used for controlling the output power X of the first diesel engine through a PID algorithm1 Current ofAnd the output power X of the second diesel engine2 current ofIf the allocation of | X is realized within a preset time t21 Current of－X2 current of∣/X2 current of≦ S2, the second power distribution module 54 outputs the merge success status signal to the outside if the |. X cannot be implemented within the preset time t21 Current of－X2 current of∣/X2 current ofAnd S2, the second power distribution module 54 outputs an alarm signal to the outside. 3% to 8% of S2, preferably 5% of S2.
The lengths of t1 and t2 are set to be related to the dynamic response capabilities of the first diesel engine and the second diesel engine, and t1 and t2 may be set to be 2 to 4 seconds, and t1 and t2 may be equal or different.
Please refer to fig. 4. The method for realizing automatic parallel operation of the diesel engine with the PTO shaft and the generator comprises the following steps:
after receiving a parallel operation control command input from the outside, the parallel operation control device 5 determines whether the rotation speed of the second diesel engine 12 is synchronous with the rotation speed of the first diesel engine according to the received rotation speed signal of the first diesel engine 11 and the rotation speed signal of the second diesel engine 12; the first diesel engine 11 drives the propeller shaft 6 to rotate and drives the PTO shaft to drive the generator 3 to operate in a PTO mode; the rated power of the first diesel engine 11 is greater than or equal to the rated power of the second diesel engine 12;
if the rotating speed of the second diesel engine 12 is not synchronous with the rotating speed of the first diesel engine 11, the parallel operation control device 5 controls the rotating speed of the second diesel engine 12 through the second diesel engine electric control system 14 and/or controls the rotating speed of the first diesel engine 11 through the first diesel engine electric control system 13 until the rotating speed of the second diesel engine 12 is synchronous with the rotating speed of the first diesel engine 11;
after the rotation speed of the second diesel engine 12 and the rotation speed of the first diesel engine 11 are synchronized, the parallel operation control device 5 controls the second diesel engine clutch 216 of the gear box 21 to be connected and arranged through the gear box control mechanism 22, so that the torque output by the second diesel engine 12 is transmitted to the propeller shaft 6;
the parallel operation control device 5 determines a power distribution mode according to the rated power X1 of the first diesel engine 11, the rated power X2 of the second diesel engine 12, the rated received power load X3 of the propeller, the rated power load X4 of the PTO shaft generator 3, the transmission efficiency eta 1 of the propeller shaft, the efficiency eta 2 of the PTO shaft generator 3, the lowest oil consumption power X5 under the rated rotating speed of the first diesel engine 11 and the lowest oil consumption power X6 under the rated rotating speed of the second diesel engine 12, wherein if X1 is not more than X3/eta 1+ X4/eta 2 is not more than X1+ X2, and X3/eta 1+ X4/eta 2 is not less than X5+ X6, the mode of distributing power proportionally is determined, namely after the second diesel engine clutch 126 of the gear box 21 is successfully connected and arranged, the output power X1 of the first diesel engine 11 is enabled to be output power1 Current ofTo achieve
Figure BDA0001427392730000071
And the output power X of the second diesel engine 12 is made2 current ofTo achieve
Figure BDA0001427392730000072
If X1 is less than or equal to X3/eta 1+ X4/eta 2 is less than or equal to X1+ X2 and X3/eta 1+ X4/eta 2 is less than X5+ X6, it is determined that the power distribution mode which enables the second diesel engine to work at the rated speed with the lowest fuel consumption is adopted, namely the output power X of the first diesel engine 11 is enabled to be adopted after the second diesel engine clutch 126 of the gear box 21 is successfully connected and exhausted1 Current ofReaching X3/. eta.1 + X4/. eta.2-X6 and making the output power X of the second diesel engine 122 current ofTo X6;
the parallel operation control device 5 controls the output power X of the first diesel engine 11 in the determined power distribution manner based on the received output power signal of the first diesel engine 11 fed back by the first diesel engine electric control system 13 and the received output power signal of the second diesel engine 12 fed back by the second diesel engine electric control system 141 Current ofAnd the output power X of the second diesel engine 122 current of。
Preferably, the parallel operation control device 5 controls the output power X of the first diesel engine 11 through a PID algorithm1 Current ofAnd the output power X of the second diesel engine 122 current ofThe power is distributed in a proportional way if | X1/X2-X is realized within a preset time t11 Current of/X2 current of| ≦ S1, the merge control device 5 outputs the merge success status signal to the outside, if the |. X1/X2-X cannot be realized within the preset time t11 Current of/X2 current ofIf the symbol is not more than S1, the parallel operation control device 5 outputs an alarm signal to the outside; s1 is more than or equal to 3 percent and less than or equal to 8 percent. Preferably, S1 is 5%.
Preferably, the parallel operation control device 5 controls the output power X of the first diesel engine 11 through a PID algorithm1 Current ofAnd the output power X of the second diesel engine 122 current ofThe allocation is made in such a way that the second diesel engine operates at the rated speed with the lowest power consumption, if | X is realized within a preset time t21 Current of－X2 current of∣/X2 whenFront side≦ S2, the merge control device 5 outputs the merge success status signal to the outside, if |. X cannot be realized within the preset time t21 Current of－X2 current of∣/X2 current ofIf the speed is less than or equal to S2, the parallel operation control device 5 outputs an alarm signal to the outside; s2 is more than or equal to 3 percent and less than or equal to 8 percent. Preferably, S2 is 5%.
The parallel operation control device 5 controls the output power X of the first diesel engine 11 through a PID algorithm1 Current ofAnd the output power X of the second diesel engine 122 current ofAnd then, the power distribution is controlled by giving a set rotating speed value of an adjusting object and adjusting the rotating speed.
The power device with the PTO shaft and the generator based on the combined propulsion of the firewood and the vehicle can be applied to various ships such as scientific research ships, ocean working ships and the like.

Claims (7)

1. A power device based on diesel and diesel combined propulsion and provided with a PTO shaft generator is characterized by comprising a first diesel engine, a second diesel engine, a first diesel engine electric control system, a second diesel engine electric control system, a gear box control mechanism for controlling the connecting and disconnecting of the gear box, the PTO shaft generator and a combined vehicle control device;
the output end of the first diesel engine is connected with a first input shaft of the gearbox, the output end of the second diesel engine is connected with a second input shaft of the gearbox, the output end of the PTO shaft with the generator is connected with a first output shaft of the gearbox, and a second output shaft of the gearbox is connected with a propeller shaft of a ship;
the parallel operation control device is respectively in communication connection with the first diesel engine electric control system, the second diesel engine electric control system and the gear box control mechanism, and is used for controlling the rotating speed of the first diesel engine through the first diesel engine electric control system, controlling the rotating speed of the second diesel engine through the second diesel engine electric control system, controlling the connection and disconnection of the gear box through the gear box control mechanism, and receiving a rotating speed signal and an output power signal of the first diesel engine fed back by the first diesel engine electric control system, a rotating speed signal and an output power signal of the second diesel engine fed back by the second diesel engine electric control system, and a connection and disconnection state fed back by the gear box control mechanism;
the rated power of the first diesel engine is greater than or equal to the rated power of the second diesel engine; the parallel operation control device comprises a connecting and draining control module, a power distribution mode determining module, a first power distribution module and a second power distribution module;
the connecting and discharging control module is used for controlling the rotating speed of the second diesel engine and/or controlling the rotating speed of the first diesel engine through the first diesel engine electric control system based on the received rotating speed signal of the first diesel engine and the rotating speed signal of the second diesel engine according to an externally input parallel operation control instruction, so that the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine, and after the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine, the connecting and discharging control module controls a second diesel engine clutch of the gear box through the gear box control mechanism to connect and discharge, so that the torque output by the second diesel engine is transmitted to the propeller shaft;
the power distribution mode determining module is used for determining a power distribution mode according to a rated power X1 of the first diesel engine, a rated power X2 of the second diesel engine, a rated received power load X3 of a propeller, a rated power load X4 of a PTO shaft generator, a propeller shaft transmission efficiency eta 1, an efficiency eta 2 of the PTO shaft generator, a minimum fuel consumption power X5 under the rated rotating speed of the first diesel engine and a minimum fuel consumption power X6 under the rated rotating speed of the second diesel engine, wherein if X1 is not less than X3/eta 1+ X4/eta 2 is not more than X1+ X2 and X3/eta 1+ X4/eta 2X 5+ X6, the first power distribution unit is used for carrying out distribution regulation on the output power of the first diesel engine and the second diesel engine, if X1 is not less than X3/eta 1+ X4/eta 2 is not more than X1+ X2 and X2/eta 56/828653 + X868427, determining that the second power distribution unit distributes and adjusts the output power of the first diesel engine and the output power of the second diesel engine;
the first power distribution module is used for enabling the output power X of the first diesel engine to be X after the second diesel engine clutch of the gearbox is successfully connected and arranged1 Current ofTo achieve
Figure FDA0002714143470000021
And make the second diesel engineOutput power X of2 current ofTo achieve
Figure FDA0002714143470000022
The second power distribution module is used for enabling the output power X of the first diesel engine to be X after the second diesel engine clutch of the gearbox is successfully connected and arranged1 Current ofReaching X3/. eta.1 + X4/. eta.2-X6, and making the output power of the second diesel engine X2 current ofX6 was reached.
2. The diesel-based combined propulsion power plant with a PTO shaft generator as claimed in claim 1, wherein the first power distribution module is used for controlling the output power X of the first diesel engine through a PID algorithm1 Current ofAnd the output power X of the second diesel engine2 current ofIf the allocation of (5) is realized within the preset time t1 | -X1/X2-X1 Current of/X2 current of| ≦ S1, the first power allocation module outputs the merge success status signal to the outside, and if the |. X1/X2-X cannot be realized within the preset time t11 Current of/X2 current ofWhen the voltage is less than or equal to S1, the first power distribution module outputs an alarm signal to the outside; s1 is more than or equal to 3 percent and less than or equal to 8 percent.
3. The diesel-diesel hybrid based combined propulsion power plant with PTO shaft generator according to claim 1 or 2, characterized in that the second power distribution module is adapted to control the output power X of the first diesel engine by means of PID algorithm1 Current ofAnd the output power X of the second diesel engine2 current ofIf the allocation of | X is realized within a preset time t21 Current of－X2 current of∣/X2 current ofAnd less than or equal to S2, the second power distribution module outputs a parallel operation success status signal to the outside, if the completion of |. X cannot be realized within the preset time t21 Current of－X2 current of∣/X2 current ofIf the power is less than or equal to S2, the second power distribution module outputs an alarm signal to the outside; s2 is more than or equal to 3 percent and less than or equal to 8 percent.
4. The power plant based on the combination propulsion of diesel and diesel vehicles with a PTO shaft and a generator as claimed in claim 1, characterized in that the combination control device is a single chip.
5. The method for realizing automatic parallel operation of the diesel engine with the PTO shaft and the generator is characterized by comprising the following steps of:
after receiving a parallel operation control command input from the outside, the parallel operation control device judges whether the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine according to the received rotating speed signal of the first diesel engine and the rotating speed signal of the second diesel engine; the first diesel engine drives the propeller shaft to rotate and drives the PTO shaft to drive the generator to operate in a PTO mode; the rated power of the first diesel engine is more than or equal to the rated power of the second diesel engine;
if the rotating speed of the second diesel engine is not synchronous with the rotating speed of the first diesel engine, the parallel operation control device controls the rotating speed of the second diesel engine through the second diesel engine electric control system and/or controls the rotating speed of the first diesel engine through the first diesel engine electric control system until the rotating speed of the second diesel engine is synchronous with the rotating speed of the first diesel engine;
after the rotating speed of the second diesel engine is synchronous with that of the first diesel engine, the parallel operation control device controls the second diesel engine clutch of the gear box to be connected and arranged through the gear box control mechanism, so that the torque output by the second diesel engine is transmitted to the propeller shaft;
the parallel operation control device determines a power distribution mode according to the rated power X1 of the first diesel engine, the rated power X2 of the second diesel engine, the rated received power load X3 of a propeller, the rated power load X4 of a PTO shaft generator, the transmission efficiency eta 1 of a propeller shaft system, the efficiency eta 2 of the PTO shaft generator, the lowest oil consumption power X5 under the rated rotating speed of the first diesel engine and the lowest oil consumption power X6 under the rated rotating speed of the second diesel engine, wherein if X1 is not more than X3/eta 1+ X4/eta 2 is not more than X1+ X2, and X3/eta 1+ X4/eta 2X 5+ X6, the mode of distributing power according to proportion is determined, namely after the clutch of the second diesel engine of the gear box is successfully connected and arranged, the output power X1 of the first diesel engine is enabled to be adopted1 Current ofTo achieve
Figure FDA0002714143470000031
And the output power X of the second diesel engine2 current ofTo achieve
Figure FDA0002714143470000032
If X1 is not less than X3/eta 1+ X4/eta 2 is not less than X1+ X2 and X3/eta 1+ X4/eta 2 is less than X5+ X6, determining to adopt a power distribution mode which enables the second diesel engine to work at the rated rotating speed with the lowest oil consumption power, namely enabling the output power X of the first diesel engine to be X after the second diesel engine clutch of the gear box is successfully connected and discharged1 Current ofReaching X3/. eta.1 + X4/. eta.2-X6, and making the output power of the second diesel engine X2 current ofTo X6;
the parallel operation control device controls the output power X of the first diesel engine according to the determined power distribution mode based on the received output power signal of the first diesel engine fed back by the first diesel engine electric control system and the output power signal of the second diesel engine fed back by the second diesel engine electric control system1 Current ofAnd the output power X of the second diesel engine2 current of。
6. The method for realizing automatic parallel operation of diesel engines with PTO shaft generators as claimed in claim 5, wherein said parallel operation control means controls the output power X of the first diesel engine by PID algorithm1 Current ofAnd the output power X of the second diesel engine2 current ofThe power is distributed in a proportional way if | X1/X2-X is realized within a preset time t11 Current of/X2 current of| ≦ S1, the merge control device outputs the merge success status signal to the outside, if the |. X1/X2-X cannot be realized within the preset time t11 Current of/X2 current ofIf the symbol is less than or equal to S1, the parallel operation control device outputs an alarm signal to the outside; s1 is more than or equal to 3 percent and less than or equal to 8 percent.
7. The method for realizing automatic parallel operation of diesel engines with PTO shaft generators as claimed in claim 5, wherein said parallel operation control means controls the output power X of the first diesel engine by PID algorithm1 Current ofAnd of a second diesel engineOutput power X2 current ofThe allocation is made in such a way that the second diesel engine operates at the rated speed with the lowest power consumption, if | X is realized within a preset time t21 Current of－X2 current of∣/X2 current ofAnd less than or equal to S2, the parallel operation control device outputs a parallel operation success status signal to the outside, if the completion of |. X cannot be realized within the preset time t21 Current of－X2 current of∣/X2 current ofIf the speed is less than or equal to S2, the parallel operation control device outputs an alarm signal to the outside; s2 is more than or equal to 3 percent and less than or equal to 8 percent.
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