CN111319747B - Ship direct-current networking management control system based on industrial Ethernet ring and power management method thereof - Google Patents
Ship direct-current networking management control system based on industrial Ethernet ring and power management method thereof Download PDFInfo
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- CN111319747B CN111319747B CN202010221177.XA CN202010221177A CN111319747B CN 111319747 B CN111319747 B CN 111319747B CN 202010221177 A CN202010221177 A CN 202010221177A CN 111319747 B CN111319747 B CN 111319747B
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- 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
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- 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
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J3/02—Driving of auxiliaries from propulsion power plant
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J2003/001—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam
- B63J2003/002—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam by using electric power
Abstract
The invention discloses a ship direct current networking management control system based on an industrial Ethernet ring network and a power management method thereof. The power management system of the invention adopts the Ethernet-based dual control system, when any transmission link in the whole Ethernet ring network system is interrupted, the system can still keep data transmission and normal operation, and when the main controller fails, the system can be switched to a local mode to operate, thereby improving the reliability of the whole system. When the power management system of the invention distributes power, the error between different bus voltages is considered, the voltage compensation factor is increased, and each diesel generator set is automatically controlled to run at a better fuel consumption point in real time; the power management system adopts a two-stage power limiting method, adopts different power limiting methods aiming at three different operation conditions, enlarges the range of power limitation, realizes the protection of the whole ship power grid, prolongs the service life of the unit and ensures that each subsystem operates stably.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a ship direct-current networking management control system based on an industrial Ethernet ring network and a power management method thereof.
Background
Whether each component module of the direct current networking electric propulsion system operates well or not and the components are coordinated with each other to exert the best efficiency are the key of the quality, safety and reliable operation of the whole electric propulsion system.
The power management system (PMS for short) is used as a core control (management and control) system of the whole direct current networking electric propulsion ship (system), executes the control, detection, regulation and protection functions of the generator, and ensures the continuous, reliable and economic operation of the power station through reasonably regulating the state of the power station, so the power management system is particularly important for ensuring the continuous supply and quality of the electric power of the ship direct current networking system and the safety of a power grid.
After searching and researching the existing documents, the power management system described in patent 201210128971.5 can realize frequency adjustment and power distribution of grid sets in a semi-automatic control mode, but does not relate to a specific method of power distribution, such as how to consider the problem of voltage drop on a bus during power distribution. Meanwhile, power limitation is introduced, and a specific method for limiting the power is not provided, so that the adaptability of the method to the complex navigation working condition of the ship is difficult to judge. The ethernet ring protection method disclosed in patent 201210346466.8 solves the problem of failure of the ethernet ring node itself through link switching, but this method is not suitable for a complex operating power management system for ship dc networking. The power distribution method disclosed in patent 201910259541.9 does not consider the mutual influence between different units when performing power fine adjustment, thereby affecting the power adjustment accuracy and effect. Therefore, the existing power management system does not well solve the problems that each subsystem is automatically adjusted when the operation condition of the ship changes, so that the operation of the subsystem is stable, the energy among the subsystems is automatically balanced, the operation safety and stability of the whole system are improved, the total energy utilization efficiency is improved, and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the ship direct current networking management control system based on the industrial Ethernet ring is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the ship direct-current networking management control system based on the industrial Ethernet ring network comprises a first control cabinet with a display, a second control cabinet with a display, a port main controller, a starboard main controller and two groups of sub-control assemblies, wherein the first control cabinet is arranged in a ship control room, the second control cabinet is arranged in the ship control room, the sub-control assemblies are arranged on a port and a starboard respectively, the port main controller and the starboard main controller are communicated with each other, the port main controller and the starboard sub-control assemblies are communicated with each other, the port main controller and the first control cabinet are communicated with each other through a first industrial switch, the starboard main controller and the second control cabinet are communicated with each other through a second industrial switch, and the first control cabinet and the second control cabinet are communicated with each other; the sub-control assemblies on the port side are communicated with the main port side controller, and the sub-control assemblies on the starboard side are communicated with the main starboard side controller; the sub-control assembly comprises a side-push module sub-controller, a main-push module sub-controller, a daily circuit sub-controller, a capacitance module sub-controller and N power generation module sub-controllers from the first to the Nth which are connected in series for communication;
the other technical problem to be solved by the invention is as follows: the power management method of the ship direct current networking management control system of the industrial Ethernet ring is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the power management method of the ship direct current networking management control system of the industrial Ethernet ring network comprises the following specific steps:
step a: pre-charging a direct current bus, and electrifying the system;
step b: inputting a power distribution instruction or a power limiting instruction through man-machine interaction of the first control cabinet or the second control cabinet;
step c: the system receives the instruction and judges whether the task is power distribution or power limitation;
step d: when the system communication route is normally operated, the system transmits data along the port communication route or the starboard communication route, and executes the step e; when a transmission link of a communication route at a certain position in the management control system is interrupted, the system simultaneously carries out data transmission along a port communication route and a starboard communication route, and executes the step e; when any sub-controller in the port or starboard sub-control assembly does not receive a starting control pulse signal sent by the corresponding port main controller or starboard main controller, judging that the corresponding port main controller or starboard main controller has a fault, and feeding back a fault signal to a display of the first control cabinet or the second control cabinet to prompt that the system needs to be maintained;
step e: when the system receives the power distribution instruction, executing the steps e-1 to e-5; when the system receives the power limiting instruction, executing the step e-6 to the step e-20;
step e-1: according to the better energy consumption point of the diesel generator set, a direct current bus voltage control interval U1-U2(975V-1000V) is preset;
step e-2: each power generation module sub-controller respectively collects current I of corresponding diesel generator set1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the power value of the corresponding diesel generator set: p is a radical of1＝I1*U1、p2＝I2*U2、…、pn＝In*UnAnd uploading to a corresponding port main controller or starboard main controller;
step e-3: each power generation module sub-controller controls the voltage of the direct current bus in a preset interval through the control of a voltage outer ring and a current inner ring;
step e-4: the port main controller or the starboard main controller is used for controlling the power value p of the corresponding diesel generator set according to the power value p of the corresponding diesel generator set1、p2… and pnSeparately calculating the voltage compensation factor K1、K2… and KnAnd output to the corresponding power generation module sub-controller;
…
where Kp and Ki are correction constants, PAVGPower P required for systemTargetAverage value of (i), i.e.
Step e-5: each power generation module sub-controller receives corresponding compensation information sent by a port main controller or a starboard main controller, and adjusts the compensation information by combining the measurement of the sub-controllers: when the power of any power generation module sub-controller is lower than PAVGWhen the load command is received, the corresponding port main controller or starboard main controller provides a load command; when the power of any power generation module sub-controller is higher than PAVGThe corresponding port or starboard main controller provides an "unload" command. By the above precise control, the power distribution is kept within 2% error;
step e-6: presetting the correction power of the corresponding generator set in each power generation module sub-controller, and presetting the power limit grade at the same time: a gear and b gear, and a > b;
step e-7: each power generation module sub-controller respectively collects the rotating speed of the corresponding diesel generator set and determines the corrected power p of the diesel generator setx1、px2、…、pxnAnd calculating the total power of the unit:
P1＝px1+px2+…+pxn；
step e-8: each power generation module sub-controller respectively collects current I of corresponding diesel generator set end1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the corresponding power: p is a radical of1＝I1*U1、p2＝I2*U2、…、pn＝In*Un；
Step e-9: calculating the total load power of each generator set on the port side or the starboard side:
P2＝p1+p2+…+pn；
step e-10: calculating the total load rate of each generator set on the port side or the starboard side: is P ═ P2/P1；
Step e-11: presetting a total load rate threshold of a third gear unit: the first total load rate 1, the second total load rate 2 and the third total load rate 3 are respectively, and 1 is more than 2 and less than 3;
step e-12: the port main controller and the starboard main controller respectively judge the total load rate of the generator set on the corresponding sides: if the total load rate of the unit is 1 & lt 2, executing the step e-13; if the total load rate of the unit is less than 2 and less than 3, executing the step e-14; if the total load rate of the unit is larger than 3, executing the step e-18 to the step e-20;
step e-13: timing by a set time length of m minutes, and if the total load rate of the unit still meets 1 < 2 after m minutes, executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-14: timing with a set time length of n seconds, and if the group total load rate after n seconds meets 1 < 3, executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-15: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-16: when the step e-15 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the corresponding starboard main propulsion motor to a, and the time delay is set for m minutes;
step e-17: after the time delay is set for m minutes, the port main controller or the starboard main controller releases the power limit on the port main propulsion motor or the starboard main propulsion motor, and then the execution is finished;
step e-18: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-19: when the step e-18 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the corresponding starboard main propulsion motor to b, and the time delay is set to be m minutes;
step e-20: after the delay time is set for m minutes, the port main controller or the starboard main controller releases the power limit for the port main propulsion motor or the starboard main propulsion motor, and then the execution is ended.
As a preferable scheme, in the step d, a fault signal is fed back to a display of the first control cabinet or the second control cabinet to prompt that the system needs to be maintained and the step f is executed at the same time; when the system receives the power distribution instruction, executing the steps f-1 to f-6; when the system receives the power limiting instruction, the execution is finished;
step f-1: and the sub-controllers are switched into a local mode, namely receiving a control instruction of a cabinet door button of a local control cabinet of the diesel engine set.
Step f-2: each power generation module sub-controller respectively collects the voltage values of the corresponding diesel generating sets, and transmits and displays the voltage values on the local control cabinet doors of the corresponding diesel generating sets;
step f-3: each power generation module sub-controller controls the voltage of the direct current bus in an interval U1-U2 through the control of a voltage outer ring and a current inner ring;
step f-4: the operating personnel adjusts power distribution through the voltage value on the local control cabinet door: when the voltage of any diesel generator set is lower than the set voltage lower limit U1, an operator starts a loading button on a cabinet door of the local control cabinet and sends a loading command; when the voltage of any diesel generator set is higher than the set upper voltage limit U2, an operator starts a load shedding button on a cabinet door of a local control cabinet to send a load shedding instruction, and power distribution is kept within 2% of error through the control;
step f-5: and (6) ending.
As a preferable scheme, when the power limiting level of the corresponding generator set is preset in each power generation module sub-controller in step e-6, the a gear is 30% of the total power of the corresponding generator set, and the b gear is 0.
As a preferable scheme, a total load rate threshold of the third gear unit is preset in the step e-11: the first total load rate 1 is 85%, the second total load rate 2 is 95%, and the third total load rate 3 is 120%.
The invention has the beneficial effects that:
(1) the power management system of the invention adopts an Ethernet-based ring network dual-control system, and the dual-control system is one standby and one use; when any transmission link in the whole Ethernet ring network system is interrupted, the system can still keep data transmission and normal operation, and when the main controller fails, the system can be switched to a local mode to operate, so that the reliability of the whole system is improved.
(2) When the power management system of the invention distributes power, the error between different bus voltages is considered, the voltage compensation factor is increased, and each diesel generating set is automatically controlled to run at a better fuel consumption point in real time, thus not only saving cost and improving the utilization rate of fuel, but also reducing the emission of pollutants and protecting marine environment;
(3) the power management system adopts a two-stage power limiting method, adopts different power limiting methods aiming at three different operation working conditions, enlarges the range of power limitation, not only realizes the protection of the whole ship power grid, prolongs the service life of the unit, but also enables each subsystem to operate stably.
(4) The power management system automatically balances the energy among the subsystems through power distribution and power limitation, thereby not only improving the operation stability of the whole system, but also improving the total energy utilization efficiency of the whole ship power grid.
Drawings
FIG. 1 is a topology structure diagram of a DC networking power management system of the present invention
FIG. 2 is a single line diagram of a DC networking power management system of the present invention
FIG. 3 is a power limit control flow diagram of the present invention
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the ship direct-current networking management control system based on the industrial ethernet ring network includes a first control cabinet with a display, a second control cabinet with a display, a port main controller, a starboard main controller, and two groups of sub-control assemblies, wherein the first control cabinet is arranged in a ship control room, the second control cabinet is arranged in the ship control room, the sub-control assemblies are arranged on the port and the starboard, the port main controller and the starboard main controller are communicated with each other, the port main controller and the first control cabinet are communicated with each other through a first industrial switch, the starboard main controller and the second control cabinet are communicated with each other through a second industrial switch, and the first control cabinet and the second control cabinet are communicated with each other; the sub-control assemblies on the port side are communicated with the main port side controller, and the sub-control assemblies on the starboard side are communicated with the main starboard side controller; the sub-control assembly comprises a side-push module sub-controller, a main-push module sub-controller, a daily circuit sub-controller, a capacitance module sub-controller and N power generation module sub-controllers from the first to the Nth which are connected in series for communication;
as shown in fig. 1 to 3, the power management method of the ship dc networking management control system based on the industrial ethernet ring network specifically includes the following operation methods:
step a: pre-charging a direct current bus, and electrifying the system;
step b: inputting a power distribution instruction or a power limiting instruction through man-machine interaction of the first control cabinet or the second control cabinet;
step c: the system receives the instruction and judges whether the task is power distribution or power limitation;
step d: when the system communication route is normally operated, the system transmits data along the port communication route or the starboard communication route, and executes the step e;
when a transmission link of a communication route at a certain position in the management control system is interrupted, the system simultaneously carries out data transmission along a port communication route and a starboard communication route, and executes the step e;
when any sub-controller in the port or starboard sub-control assembly does not receive a starting control pulse signal sent by the corresponding port main controller or starboard main controller, judging that the corresponding port main controller or starboard main controller has a fault, and feeding back a fault signal to a display of the first control cabinet or the second control cabinet to prompt that the system needs to be maintained; simultaneously executing the step f;
step e: when the system receives the power distribution instruction, executing the steps e-1 to e-5; when the system receives the power limiting instruction, executing the step e-6 to the step e-20;
step e-1: according to the better energy consumption point of the diesel generator set, a direct current bus voltage control interval U1-U2(975V-1000V) is preset;
step e-2: each power generation module sub-controller respectively collects current I of corresponding diesel generator set1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the power value of the corresponding diesel generator set: p is a radical of1＝I1*U1、p2＝I2*U2、…、on＝In*UnAnd uploading to a corresponding port main controller or starboard main controller;
step e-3: each power generation module sub-controller controls the voltage of the direct current bus in a preset interval through the control of a voltage outer ring and a current inner ring;
step e-4: the port main controller or the starboard main controller is used for controlling the power value p of the corresponding diesel generator set according to the power value p of the corresponding diesel generator set1、p2… and pnSeparately calculating the voltage compensation factor K1、K2… and KnAnd output to the corresponding power generation module sub-controller;
…
where Kp and Ki are correction constants, in this example, Kp is 0.001Ki is 0.0005, and P isAVGPower P required for systemTargetAverage value of (i), i.e.
Step e-5: each power generation module sub-controller receives corresponding compensation information sent by a port main controller or a starboard main controller, and adjusts the compensation information by combining the measurement of the sub-controllers: when the power of any power generation module sub-controller is lower than PAVGWhen the load command is received, the corresponding port main controller or starboard main controller provides a load command; when the power of any power generation module sub-controller is higher than PAVGThe corresponding port or starboard main controller provides an "unload" command. By the above precise control, the power distribution is kept within 2% error;
step e-6: presetting the correction power of the corresponding generator set in each power generation module sub-controller, and presetting the power limit grade at the same time: a (30%) range and b (0) range, and a > b;
step e-7: each power generation module sub-controller respectively collects the rotating speed of the corresponding diesel generator set and determines the corrected power p of the diesel generator setx1、px2、…、pxnAnd calculating the total power of the unit: p1＝px1+px2+…+pxn；
Step e-8: each power generation module sub-controller respectively collects current I of corresponding diesel generator set end1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the corresponding power: p is a radical of1＝I1*U1、p2＝I2*U2、…、pn＝In*Un；
Step e-9: calculating the total load power of each generator set on the port side or the starboard side: p2＝p1+p2+…+pn；
Step e-10: calculating the total load rate of each generator set on the port side or the starboard side: is P ═ P2/P1；
Step e-11: presetting unit total load rate threshold values 1 (85%), 2 (95%) and 3 (120%), wherein 1 is more than 2 and less than 3;
step e-12: the port main controller and the starboard main controller respectively judge the total load rate of the generator set on the corresponding sides: if the total load rate (85%) of the unit is 1 < 2 (95%), executing the step e-13; if the total load rate (95%) of the unit is 2 < 3 (120%), executing the step e-14; if the total load rate of the unit is more than 3 (120%), executing the step e-18 to the step e-20;
step e-13: timing for 1 minute in a set time length, and if the total load rate of the unit still meets (85%) 1 < 2 (95%) after 1 minute, executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-14: timing with a set time length of 1 second, and if the group total load rate after 1 second meets (85%) 1 < 3 (120%), executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-15: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-16: while the step e-15 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the starboard main propulsion motor to a (30%) (namely, a power limiting mode 1), and the time is set for 1 minute in a delayed mode;
step e-17: after the time delay is set for 1 minute, the port main controller or the starboard main controller releases the power limit on the port main propulsion motor or the starboard main propulsion motor, and then the execution is finished;
step e-18: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-19: while the step e-18 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the starboard main propulsion motor to b (0) (namely, a power limiting mode 2), and the time is set to be 1 minute in a delayed mode;
step e-20: after the time delay is set for 1 minute, the port main controller or the starboard main controller releases the power limit on the port main propulsion motor or the starboard main propulsion motor, and then the execution is finished;
f, performing a step; when the system receives the power distribution instruction, executing the steps f-1 to f-6; when the system receives the power limiting instruction, the execution is finished;
step f-1: and the sub-controllers are switched into a local mode, namely receiving a control instruction of a cabinet door button of a local control cabinet of the diesel engine set.
Step f-2: each power generation module sub-controller respectively collects the voltage values of the corresponding diesel generating sets, and transmits and displays the voltage values on the local control cabinet doors of the corresponding diesel generating sets;
step f-3: each power generation module sub-controller controls the voltage of the direct current bus in a section (U1-U2) (975V-1000V) through the control of a voltage outer ring and a current inner ring;
step f-4: the operating personnel adjusts power distribution through the voltage value on the local control cabinet door: when the voltage of any diesel generator set is lower than the set voltage lower limit U1, an operator starts a loading button on a cabinet door of the local control cabinet and sends a loading command; when the voltage of any diesel generator set is higher than the set upper voltage limit U2, an operator starts a load shedding button on a cabinet door of a local control cabinet to send a load shedding instruction, and power distribution is kept within 2% of error through the control;
step f-5: and (6) ending.
The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (5)
1. Ship direct current network deployment management control system based on industry ethernet ring, its characterized in that: the ship control system comprises a first control cabinet with a display, a second control cabinet with a display, a port main controller, a starboard main controller and two groups of sub-control assemblies, wherein the first control cabinet is arranged in a ship control room, the second control cabinet is arranged in the ship control room, the second control cabinet is provided with the display, the port main controller and the starboard main controller are arranged on a port side and a starboard side respectively, the port main controller and the starboard main controller are communicated with each other, the port sub-control assemblies and the starboard sub-control assemblies are communicated with each other, the port main controller and the first control cabinet are communicated with each other through a first industrial switch, the starboard main controller and the second control cabinet are communicated with each other through a second industrial switch, and the first control cabinet and the; the sub-control assemblies on the port side are communicated with the main port side controller, and the sub-control assemblies on the starboard side are communicated with the main starboard side controller; the sub-control assembly comprises a side-push module sub-controller, a main-push module sub-controller, a daily circuit sub-controller, a capacitance module sub-controller and N power generation module sub-controllers from the first to the Nth which are connected in series for communication.
2. The power management method of the ship direct-current networking management control system based on the industrial ethernet ring as claimed in claim 1, specifically comprising:
step a: pre-charging a direct current bus, and electrifying the system;
step b: inputting a power distribution instruction or a power limiting instruction through man-machine interaction of the first control cabinet or the second control cabinet;
step c: the system receives the instruction and judges whether the task is power distribution or power limitation;
step d: when the system communication route is normally operated, the system transmits data along the port communication route or the starboard communication route, and executes the step e; when a transmission link of a communication route at a certain position in the management control system is interrupted, the system simultaneously carries out data transmission along a port communication route and a starboard communication route, and executes the step e; when any sub-controller in the port or starboard sub-control assembly does not receive a starting control pulse signal sent by the corresponding port main controller or starboard main controller, judging that the corresponding port main controller or starboard main controller has a fault, and feeding back a fault signal to a display of the first control cabinet or the second control cabinet to prompt that the system needs to be maintained;
step e: when the system receives the power distribution instruction, executing the steps e-1 to e-5; when the system receives the power limiting instruction, executing the step e-6 to the step e-20;
step e-1: according to the better energy consumption point of the diesel generator set, presetting a direct current bus voltage control interval U1-U2;
step e-2: each power generation module sub-controller respectively collects current I of corresponding diesel generator set1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the power value of the corresponding diesel generator set: p is a radical of1＝I1*U1、p2＝I2*U2、…、pn＝In*UnAnd uploading to a corresponding port main controller or starboard main controller;
step e-3: each power generation module sub-controller controls the voltage of the direct current bus in a preset interval through the control of a voltage outer ring and a current inner ring;
step e-4: the port main controller or the starboard main controller is used for controlling the power value p of the corresponding diesel generator set according to the power value p of the corresponding diesel generator set1、p2… and pnSeparately calculating the voltage compensation factor K1、K2… and KnAnd output to the corresponding power generation module sub-controller;
K1＝Kp(PAVG-p1)+Ki∫0 ∞(PAVG-pi)dt
K2＝Kp(PAVG-p2)+Ki∫0 ∞(PAVG-pi)dt
…
Kn＝Kp(PAVG-pn)+Ki∫0 ∞(PAVG-pi)dt
where Kp and Ki are correction constants, PAVGPower P required for systemTargetAverage value of (i), i.e.
Step e-5: each power generation module sub-controller receives the portAnd (3) corresponding compensation information sent by the main controller or the starboard main controller is combined with the measurement of the main controller to adjust: when the power of any power generation module sub-controller is lower than PAVGWhen the load command is received, the corresponding port main controller or starboard main controller provides a load command; when the power of any power generation module sub-controller is higher than PAVGWhen the load is reduced, the corresponding port main controller or starboard main controller provides a load reduction command; by the above precise control, the power distribution is kept within 2% error;
step e-6: presetting the correction power of the corresponding generator set in each power generation module sub-controller, and presetting the power limit grade at the same time: a gear and b gear, and a > b;
step e-7: each power generation module sub-controller respectively collects the rotating speed of the corresponding diesel generator set and determines the corrected power p of the diesel generator setx1、px2、…、pxnAnd calculating the total power of the unit:
P1＝px1+px2+…+pxn；
step e-8: each power generation module sub-controller respectively collects current I of corresponding diesel generator set end1、I2、…、InSum voltage U1、U2、…、UnAnd calculating the corresponding power: p is a radical of1＝I1*U1、p2＝I2*U2、…、pn＝In*Un；
Step e-9: calculating the total load power of each generator set on the port side or the starboard side:
P2＝p1+p2+…+pn；
step e-10: calculating the total load rate of each generator set on the port side or the starboard side: is P ═ P2/P1；
Step e-11: presetting a total load rate threshold of a third gear unit: the first total load rate 1, the second total load rate 2 and the third total load rate 3 are respectively, and 1 is more than 2 and less than 3;
step e-12: the port main controller and the starboard main controller respectively judge the total load rate of the generator set on the corresponding sides: if the total load rate of the unit is 1 & lt 2, executing the step e-13; if the total load rate of the unit is less than 2 and less than 3, executing the step e-14; if the total load rate of the unit is larger than 3, executing the step e-18 to the step e-20;
step e-13: timing by a set time length of m minutes, and if the total load rate of the unit still meets 1 < 2 after m minutes, executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-14: timing with a set time length of n seconds, and if the group total load rate after n seconds meets 1 < 3, executing the steps e-15 to e-17; otherwise, the execution is finished;
step e-15: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-16: when the step e-15 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the corresponding starboard main propulsion motor to a, and the time delay is set for m minutes;
step e-17: after the time delay is set for m minutes, the port main controller or the starboard main controller releases the power limit on the port main propulsion motor or the starboard main propulsion motor, and then the execution is finished;
step e-18: detecting whether the system has standby power generation capacity, if so, sending a power increase command, and then finishing execution, and if not, finishing execution;
step e-19: when the step e-18 is executed, the port main controller or the starboard main controller limits the power of the corresponding port main propulsion motor or the corresponding starboard main propulsion motor to b, and the time delay is set to be m minutes;
step e-20: after the delay time is set for m minutes, the port main controller or the starboard main controller releases the power limit for the port main propulsion motor or the starboard main propulsion motor, and then the execution is ended.
3. The power management method of the ship direct current networking management control system based on the industrial Ethernet ring network as claimed in claim 2, wherein: in the step d, a fault signal is fed back to a display of the first control cabinet or the second control cabinet to prompt that the system needs to be maintained and the step f is executed; when the system receives the power distribution instruction, executing the steps f-1 to f-6; when the system receives the power limiting instruction, the execution is finished;
step f-1: the sub-controllers are switched into a local mode, namely, a control instruction of a cabinet door button of a local control cabinet of the diesel engine unit is received;
step f-2: each power generation module sub-controller respectively collects the voltage values of the corresponding diesel generating sets, and transmits and displays the voltage values on the local control cabinet doors of the corresponding diesel generating sets;
step f-3: each power generation module sub-controller controls the voltage of the direct current bus in an interval U1-U2 through the control of a voltage outer ring and a current inner ring;
step f-4: the operating personnel adjusts power distribution through the voltage value on the local control cabinet door: when the voltage of any diesel generator set is lower than the set voltage lower limit U1, an operator starts a loading button on a cabinet door of the local control cabinet and sends a loading command; when the voltage of any diesel generator set is higher than the set upper voltage limit U2, an operator starts a load shedding button on a cabinet door of a local control cabinet to send a load shedding instruction, and power distribution is kept within 2% of error through the control;
step f-5: and (6) ending.
4. The power management method of the ship direct current networking management control system based on the industrial Ethernet ring network as claimed in claim 2 or 3, wherein: and e-6, when the power limiting level of the corresponding generator set is preset in each power generation module sub-controller, wherein the a level is 30% of the total power of the corresponding generator set, and the b level is 0.
5. The power management method of the ship direct current networking management control system based on the industrial Ethernet ring network as claimed in claim 2 or 3, wherein: presetting a total load rate threshold of the third gear unit in the step e-11: the first total load rate 1 is 85%, the second total load rate 2 is 95%, and the third total load rate 3 is 120%.
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| CN207015573U (en) * | 2017-07-26 | 2018-02-16 | 株洲中车时代电气股份有限公司 | A kind of watercraft electric propulsion system based on common DC bus |
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