CN111277038B - Hybrid power control system and method - Google Patents

Hybrid power control system and method Download PDF

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Publication number
CN111277038B
CN111277038B CN202010068792.1A CN202010068792A CN111277038B CN 111277038 B CN111277038 B CN 111277038B CN 202010068792 A CN202010068792 A CN 202010068792A CN 111277038 B CN111277038 B CN 111277038B
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China
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power
unit
diesel engine
control system
hybrid
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Chinese (zh)
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CN111277038A (en
Inventor
胡金杭
苗亚
曹亢
金泽
李超
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Chengrui Power Technology Shanghai Co
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Chengrui Electric Power Technology Shanghai Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to the field of power control, in particular to a hybrid power control system and method. The method comprises the following steps: the hybrid control system further comprises: a controller, comprising: the device comprises a collecting unit, a first judging unit and a first control unit; the first sequence comprises: when the hybrid power control system is in an initial state, firstly, a power unit is adopted to supply power to a motor; when the first judging unit judges that the power unit has a fault according to the working state of the power unit, the hybrid power control system controls the power unit to stop supplying power to the motor, and meanwhile, the diesel unit is adopted to supply power to the motor. The beneficial effects of the technical scheme are as follows: the power supply mode of alternating current-direct current double-circuit power supply and multiple standby power supplies is adopted, the system can be ensured to realize black start under the condition of no power supply, meanwhile, the system can still run in emergency under the condition of any one or two equipment faults, and the overall running stability of the tire crane hybrid power system is improved.

Description

Hybrid power control system and method
Technical Field
The invention relates to the field of power control, in particular to a hybrid power control system and method.
Background
Along with the development of world economy, the dependence degree of industrial production, transportation and the like on petroleum is higher and higher, the accompanying environmental problems of greenhouse effect, ecological deterioration and the like are more and more prominent, how to keep the harmonious development of economy and environment becomes the focus of global attention, a conventional tire type gantry crane (RTG for short) of a wharf adopts a single generator set as power, because the installed capacity is larger, a diesel engine deviates from an optimal economic oil consumption area for a long time in low load, the fuel efficiency is less than 30%, and when a lifting mechanism of the RTG descends, a trolley runs and a cart travelling mechanism decelerates and brakes, potential energy needs to be recovered, energy is consumed in real time through an energy consumption resistor due to the fact that no energy feedback device exists, and energy waste is caused.
At present, the port has developed the modification work of changing the RTG oil into electricity, but because the RTG requires flexible position movement and the convenience in RTG production is reduced after electricity is changed, an RTG hybrid power system using a diesel engine and a power battery as hybrid power is gradually applied to the port at present, and the diesel engine is enabled to always run at the optimal oil consumption point position by reducing the configuration capacity of the diesel engine, so that the oil consumption of the system is reduced. However, the RTG production task is heavy, the reliability requirement is high, a plurality of power electronic devices such as a power battery, a rectifier and an inverter are configured in the hybrid power system, and the existing improved RTG hybrid power system cannot continuously operate after the devices are in failure.
Disclosure of Invention
To solve the above-mentioned problems, a hybrid power control system and method are provided.
A hybrid control system is characterized in that the hybrid control system is connected with at least one external motor through a direct current bus and is used for controlling the motor;
the hybrid power control system comprises a power unit and a diesel unit which are respectively connected with the direct current bus;
the hybrid power control system further comprises:
a controller, said controller comprising:
the first acquisition unit is respectively connected with the power unit and the diesel unit through a plurality of communication lines and is used for acquiring the working states of the power unit and the diesel unit;
the first judgment unit is connected with the first acquisition unit and is used for acquiring the working state and judging to obtain a first judgment result;
the first control unit is connected with the first judging unit and used for controlling the power unit and the diesel unit in a preset first sequence according to the first judging result and supplying power to the motor through the direct current bus;
the first sequence comprises:
when the hybrid power control system is in an initial state, firstly, the power unit is adopted to supply power to the motor;
when the first judging unit judges that the power unit breaks down according to the working state of the power unit, the hybrid power control system controls the power unit to stop supplying power to the motor, and meanwhile, the diesel unit is adopted to supply power to the motor.
Preferably, the power unit includes:
the main power unit is used for supplying power to the motor through the direct current bus;
the driven power unit is used for supplying power to the motor through the direct current bus;
the first sequence further comprises:
when the hybrid power control system is in an initial state, firstly, a main power unit in the power units is adopted to supply power to the motor;
when the first judging unit judges that the main power unit fails according to the working state of the main power unit, the hybrid power control system controls the main power unit to stop supplying power to the motor, and meanwhile, the driven power unit is adopted to supply power to the motor.
Preferably, the hybrid control system further includes:
an inversion set connected with the DC bus for obtaining the electric quantity on the DC bus,
the input end of the power supply group is respectively connected with the direct current bus, the diesel engine set and the inversion group, and the output end of the power supply group is connected with the controller and used for supplying power to the controller;
the hybrid power control system further comprises:
the second acquisition unit is connected with the diesel engine set and the inversion set through a plurality of communication lines and is used for acquiring the working states of the inversion set and the diesel engine set;
the second judgment unit is connected with the second acquisition unit and is used for acquiring the working state and judging to obtain a second judgment result;
the second control unit is connected with the second judgment unit and used for controlling the inversion set and the diesel set according to a second preset sequence according to a second judgment result and supplying power to the power supply set;
the second sequence comprises:
when the hybrid power control system is in an initial state, firstly, the diesel engine set is adopted to supply power to the power supply set;
when the second judging unit judges that the diesel engine set fails according to the working state of the diesel engine set, the hybrid power control system controls the diesel engine set to stop supplying power to the power supply set, and meanwhile, the inversion set is adopted to supply power to the power supply set.
Preferably, the power supply set comprises:
the output end of the storage battery pack is connected with the output end of the power supply set, and an electric quantity threshold value is arranged in the storage battery pack;
the hybrid power control system further comprises:
the third acquisition unit is connected with the inversion group, the diesel engine unit and the storage battery pack through a plurality of communication lines and is used for acquiring the working states of the inversion group and the diesel engine unit and the electric quantity value of the storage battery pack;
the third judgment unit is connected with the third acquisition unit and is used for acquiring the working state and the electric quantity value and judging to obtain a third judgment result;
the third control unit is connected with the third judging unit and used for controlling the diesel engine set and the inverter set to charge the storage battery pack according to a third preset sequence according to a third judging result;
the third sequence comprises:
when the hybrid power control system is in an initial state and the electric quantity value is smaller than the electric quantity threshold value, firstly, the diesel engine set is adopted to charge the storage battery pack;
when the third judging unit judges that the diesel engine set has a fault according to the working state of the diesel engine set, the hybrid power control system controls the diesel engine set to stop charging the storage battery set, and meanwhile, the inversion set is adopted to charge the storage battery set.
Preferably, the hybrid control system further includes:
the first input end of the load is connected with the inverter group, and the second input end of the load is connected with the diesel engine group;
the hybrid power control system further comprises:
the fourth acquisition unit is connected with the diesel engine set and the inversion set through a plurality of communication lines and is used for acquiring the working states of the inversion set and the diesel engine set;
the fourth judgment unit is connected with the fourth acquisition unit and is used for acquiring the working state and judging to obtain a fourth judgment result;
the fourth control unit is connected with the fourth judging unit and used for controlling the inversion set and the diesel set according to a preset fourth sequence according to a fourth judging result and supplying power to the load;
the fourth sequence comprises:
when the hybrid power control system is in an initial state, firstly, the diesel engine set is adopted to supply power to the load;
when the fourth judging unit judges that the diesel engine set fails according to the working state of the diesel engine set, the hybrid power control system controls the diesel engine set to stop supplying power to the load, and meanwhile, the inversion set is adopted to supply power to the load.
A hybrid control method for supplying power to an electric motor, applied to a hybrid control system as described above, characterized in that the electric motor is connected to a dc bus;
a power unit and a diesel unit which are connected with the direct current bus are arranged on the direct current bus;
the controller is respectively connected with the power unit and the diesel unit;
the control method includes a first process of controlling power supply to the motor:
step A1, the controller judges whether the power unit is in fault:
if yes, go to step A2;
if not, the controller controls the power unit to supply power to the motor;
step A2, the controller judges whether the diesel engine set is in fault:
if yes, ending;
and if not, the controller controls the diesel engine group to supply power to the motor.
Preferably, a main power unit and a driven power unit are arranged in the power unit;
the step A1 includes:
step a11, the controller determines whether the main power unit is faulty:
if yes, go to step A12;
if not, the controller controls the main power unit to supply power to the motor;
step A12, the controller judges whether the slave power unit is in fault:
if yes, go to step A2;
and if not, the controller controls the driven power unit to supply power to the motor.
Preferably, an inverter group connected with the direct current bus is arranged on the direct current bus,
a power supply group for supplying power to the controller is arranged on the controller, the input end of the power supply group is respectively connected with the direct current bus, the diesel engine set and the inversion group, and the output end of the power supply group is connected with the controller;
the control method further comprises a second process of controlling the power supply set to supply power:
step B1, the controller judges whether the diesel engine set is in fault:
if yes, go to step B2;
if not, the controller controls the diesel engine set to supply power to the power supply set;
step B2, the controller determines whether the inverter group is faulty:
if yes, ending;
if not, the controller controls the inverter group to supply power to the power supply group.
Preferably, a storage battery pack is arranged in the power supply group, an output end of the storage battery pack is connected with an output end of the power supply group, and an electric quantity threshold value is arranged in the storage battery pack;
the control method includes a third process of charging the secondary battery pack:
step C1, the controller determines whether the electric quantity value of the battery pack is less than the electric quantity threshold:
if yes, go to step C2;
if not, ending;
step C2, the controller judges whether the diesel engine has a fault:
if yes, go to step C3;
if not, the controller controls the diesel engine to charge the storage battery;
step C3, the controller determines whether the inverter group is faulty:
if yes, ending;
if not, the controller controls the inversion group to charge the storage battery.
Preferably, a load is arranged in the hybrid power control system, and the load is respectively connected with the inverter group and the diesel engine group;
the control method includes a fourth process of supplying power to the load:
step D1, the controller determines whether the inverter is faulty:
if yes, go to step D2;
if not, the controller controls the inverter to supply power to the load;
step D2, the controller judges whether the diesel engine set is in fault:
if yes, go to step D3;
and if not, the controller controls the diesel engine set to supply power to the load.
The beneficial effects of the technical scheme are as follows: the power supply mode of alternating current-direct current double-circuit power supply and multiple standby power supplies is adopted, the system can be ensured to realize black start under the condition of no power supply, meanwhile, the system can still run in emergency under the condition of any one or two equipment faults, and the overall running stability of the tire crane hybrid power system is improved.
Drawings
FIG. 1 is a block diagram of the power supply to the motor in a preferred embodiment of the present invention;
FIG. 2 is a block diagram of a controller in accordance with a preferred embodiment of the present invention;
FIG. 3 is a block diagram of the power supply to the controller in accordance with a preferred embodiment of the present invention;
FIG. 4 is a first process flow diagram of a preferred embodiment of the present invention;
FIG. 5 is a schematic flow chart of step A11 of a preferred embodiment of the present invention;
FIG. 6 is a second process flow diagram of a preferred embodiment of the present invention;
FIG. 7 is a third process flow diagram of a preferred embodiment of the present invention;
fig. 8 is a fourth process flow diagram of a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
A hybrid power control system is used for controlling a motor 3, as shown in figure 1, the motor 3 is connected with a direct current bus 2;
the hybrid power control system comprises a power unit 4 and a diesel unit 5 which are respectively connected with the direct current bus 2;
the hybrid control system further comprises:
a controller 1, as shown in fig. 2, the controller 1 includes:
the acquisition unit 11 is connected with the power unit 4 and the diesel unit 5 through a plurality of communication lines and is used for acquiring the working states of the power unit 4 and the diesel unit 5;
the first judging unit 12, the judging unit 12 is connected with the collecting unit 11, and is used for obtaining the working state and judging the working state to obtain a first judging result;
the first control unit 13 is connected with the first judging unit 12 and used for acquiring a first judging result and controlling the power unit 4 and the diesel unit 5 to supply power to the motor 3 through the direct current bus in a preset first sequence according to the first judging result;
the first sequence comprises:
when the hybrid power control system is in an initial state, firstly, a power unit 4 is adopted to supply power to a motor 3;
when the first judging unit 12 judges that the power unit 4 has a fault according to the working state of the power unit 4, the hybrid power control system controls the power unit 4 to stop supplying power to the motor 3, and simultaneously adopts the diesel unit 5 to supply power to the motor 3.
Specifically, in practical application, the motor 3 drives the tyre crane, the heavy object is installed on the tyre crane, and the system supplies power to the motor 3 through the direct current bus 2, so that the motor 3 can normally work, and the process that the motor 3 controls the tyre crane and drives the heavy object to move is realized.
Here, the motor 3 includes a cart motor 31, a cart motor 32 and a lifting motor 33, wherein the cart motor 31 is connected to the dc bus 2 through a cart frequency converter 311 for driving the tire crane to move transversely along the X-axis direction, the cart motor 32 is connected to the dc bus 2 through a cart frequency converter 321 for driving the tire crane to move longitudinally along the Y-axis direction, and the lifting motor 33 is connected to the dc bus 2 through a lifting frequency converter 331 for driving the tire crane to move in the height direction along the Z-axis direction.
By utilizing the technical scheme of the invention, when a fault occurs in the process of driving the motor 3, the motor 3 can be ensured to work normally, and the tyre crane is driven to move normally, or the tyre crane is slowly put down, so that the tyre crane and a heavy object arranged on the tyre crane are not damaged.
In a preferred embodiment of the present invention, the power unit 4 comprises:
a main power unit 41 for supplying power to the motor 3 through the dc bus 2;
a driven power unit 42 for supplying power to the motor 3 through the direct current bus 2;
the first sequence further comprises:
when the hybrid power control system is in an initial state, firstly, a main power unit 41 in the power unit 4 is adopted to supply power to the motor 3;
when the first judging unit 12 judges that the main power unit 41 has a fault according to the working state of the main power unit 41, the hybrid control system controls the main power unit 41 to stop supplying power to the motor, and simultaneously adopts the auxiliary power unit 42 to supply power to the motor.
Specifically, the power unit 4 includes a main power unit 41 and a sub power unit 42,
the main power unit 41 includes: the output end of the main power battery pack 411 is connected with the direct current bus 2, the first switch 412 is arranged on a connection path of the main power battery pack 411 and the direct current bus 2, and the on-off state of the first switch 412 determines whether the main power battery pack 411 can be connected with the direct current bus 2 or not, so that electric energy of the main power battery pack 411 is transmitted out to supply power to the motor 3.
Wherein, include from power unit 42: from power battery 421, first DCDC converter 422 and second switch 423, from the output of power battery 421 connect one end of first DCDC converter 422, the other end of first DCDC converter 422 connects direct current bus 2, second switch 423 sets up on the way of connecting first DCDC converter 422 and direct current bus 2, the on-off state of second switch 423 decides from power battery 421 can be connected with direct current bus 2, thereby carry out the electric energy from power battery 421, supply power to motor 3.
Wherein, diesel engine unit 5 includes: the power supply device comprises a diesel engine 51, a rectifying module 52 and a third switch 53, wherein the diesel engine 51 is connected with the rectifying module 52, the rectifying module 52 is connected with the direct current bus 2, the third switch 53 is arranged on a connecting passage of the rectifying module 52 and the direct current bus 2, and the on-off state of the third switch 53 determines whether the main power battery pack 411 can be connected with the direct current bus 2 or not, so that the electric energy of the diesel engine 51 is transmitted out to supply power to the motor 3.
Specifically, the first collecting unit 11 is connected to the slave battery pack 421, the master battery pack 411, and the diesel engine 51, respectively, collects the operating states of the slave battery pack 421, the master battery pack 411, and the diesel engine 51 through a communication line, the judging unit 12 judges the operating states, and the control unit 13 drives the slave battery pack 421, the master battery pack 411, and the diesel engine 51, and is connected to the first switch 423, the second switch 412, and the third switch 53, respectively.
Further, "adopt" here means that the hybrid control system can realize the function of controlling the power supplied from the power battery pack 421, the main power battery pack 411, and the diesel engine 51 to the motor 3 through the dc bus 2 by controlling the on/off states of a plurality of switches or controlling the operating states of a plurality of units.
In a preferred embodiment of the present invention, the hybrid control system further includes:
an inversion set 6, the inversion set 6 is connected with the DC bus 2 for receiving the voltage on the DC bus 2,
the input end of the power supply group 7 is respectively connected with the direct current bus 2, the diesel engine unit 5 and the inversion group 6, and the output end of the power supply group 7 is connected with the controller 1 and used for supplying power to the controller 1;
the hybrid control system further comprises:
the second acquisition unit is connected with the diesel engine set 5 and the inversion set 6 through a plurality of communication lines and is used for acquiring the working states of the inversion set 6 and the diesel engine set 5;
the second judgment unit is connected with the second acquisition unit and is used for acquiring the working state and judging to obtain a second judgment result;
the second control unit is connected with the second judgment unit and used for controlling the inversion set 6 and the diesel set 5 according to a second preset sequence according to a second judgment result and supplying power to the power supply set 7;
the second sequence comprises:
when the hybrid power control system is in an initial state, firstly, a diesel engine set 5 is adopted to supply power to a power supply set 7;
when the second judging unit judges that the diesel engine set 5 has a fault according to the working state of the diesel engine set 5, the hybrid power control system controls the diesel engine set 5 to stop supplying power to the power supply set 7, and meanwhile, the inversion set 6 is adopted to supply power to the power supply set 7.
Specifically, the inversion set 6 includes: contravariant module 61, transformer 62 and fourth switch 63, the one end and the direct current bus 2 of contravariant module 61 are connected, and fourth switch 63 sets up on the connection road of contravariant module 61 and direct current bus 2, and when having electric current on the direct current bus 2, contravariant module 61 accessible fourth switch 63 acquires the electric current from direct current bus 2, and required voltage is become to the rethread transformer 62 vary voltage.
Specifically, the power supply group 7, as shown in fig. 3, includes:
the input end of the ACDC converter 71 is connected with the transformer 62 of the inversion group 6 and the diesel engine 51 in the diesel engine group 5 respectively, and the output end of the ACDC converter is connected with the switching power supply 73;
a second DCDC converter 72, the input end of which is connected to the dc bus 2 and the output end of which is connected to the switching power supply 73;
and the input end of the switching power supply 73 is connected with the ACDC converter 71 and the second DCDC converter 72, the output end of the switching power supply 73 is connected with the output end of the power supply group 7, and the acquired voltage can be reduced into 24V voltage by the switching power supply 73 and then output.
Specifically, the power supply group 7 is connected to the inverter group 6 from the output terminal of the transformer 62, and the UPS power supply 74 is provided on the path connected to the ACDC converter 71.
Specifically, the second determination unit determines whether the diesel engine set 5 has a fault, thereby implementing a function of controlling the supply of power to the power supply set 7.
In addition, a manual switch 77 is provided on each of a connection path between the second DCDC converter 72 and the dc bus 2, a connection path between the inverter group 6 and the ACDC converter 71, and a connection path between the diesel engine group 5 and the ACDC converter 71, and a mechanical interlock function is provided in the manual switches connected to the inverter group 6 and the diesel engine group 5, so that a manual maintenance function in the event of a machine failure can be realized.
In a preferred embodiment of the present invention, the power supply set 7 comprises:
the output end of the storage battery pack 75 is connected with the output end of the power supply set 7, and an electric quantity threshold is arranged in the storage battery pack 75;
the hybrid control system further comprises:
the third acquisition unit is connected with the inversion group 6, the diesel engine unit 5 and the storage battery pack 75 through a plurality of communication lines and is used for acquiring the working states of the inversion group 6 and the diesel engine unit 5 and the electric quantity value of the storage battery pack 75;
the third judgment unit is connected with the third acquisition unit and used for acquiring the working state and the electric quantity value and judging to obtain a third judgment result;
the third control unit is connected with the third judging unit and used for controlling the diesel engine set 5 and the inverter set 6 to charge the storage battery pack 75 according to a third preset sequence according to a third judging result;
the third sequence comprises:
when the hybrid power control system is in an initial state and the electric quantity value is smaller than the electric quantity threshold value, firstly, the diesel engine set 5 is adopted to charge the storage battery pack 75;
when the third judging unit judges that the diesel engine set 5 has a fault according to the working state of the diesel engine set 5, the hybrid power control system controls the diesel engine set 5 to stop charging the storage battery pack 75, and simultaneously adopts the inverter set 6 to charge the storage battery pack 75.
Specifically, the power supply group 7 further includes:
a battery charger 76, the input end of the battery charger 76 is connected with the transformer 62 and the diesel engine 51 respectively, and the output end of the battery charger 76 is connected with the storage battery 75;
the output end of the storage battery pack 75 is connected with the output end of the power supply set 7, and an electric quantity threshold is arranged in the storage battery pack 75;
specifically, the third determination unit determines whether the diesel unit 5 has a fault, thereby implementing a function of controlling charging of the storage battery.
In a preferred embodiment of the present invention, the hybrid control system further includes:
a load 8, wherein a first input end of the load 8 is connected with the inversion set 6, and a second input end of the load 8 is connected with the diesel set 5;
the hybrid control system further comprises:
the fourth acquisition unit is connected with the diesel engine set 5 and the inversion set 6 through a plurality of communication lines and is used for acquiring the working states of the inversion set 6 and the diesel engine set 5;
the fourth judgment unit is connected with the fourth acquisition unit and is used for acquiring the working state and judging to obtain a fourth judgment result;
the fourth control unit is connected with the fourth judging unit and used for controlling the inversion set 6 and the diesel set 5 according to a fourth judging result in a preset fourth sequence and supplying power to the load 8;
the fourth sequence includes:
when the hybrid power control system is in an initial state, firstly, a diesel engine set 5 is adopted to supply power to a load 8;
when the fourth judging unit judges that the diesel engine set 5 has a fault according to the working state of the diesel engine set 5, the hybrid power control system controls the diesel engine set 5 to stop supplying power to the load 8, and meanwhile, the inverter set 6 is adopted to supply power to the load 8.
A hybrid control method for powering an electric motor 3, applied to a hybrid control system as described above, characterized in that the electric motor 3 is connected to a dc bus 2;
a power unit 4 and a diesel unit 5 which are connected with the direct current bus 2 are arranged on the direct current bus 2;
the controller 1 is respectively connected with the power unit 4 and the diesel unit 5;
the control method comprises a first procedure of controlling the power supply to the motor 3, as shown in fig. 4:
step a1, the controller 1 determines whether the power unit 4 is faulty:
if yes, go to step A2;
if not, the controller 1 controls the power unit 4 to supply power to the motor 3;
step a2, the controller 1 determines whether the diesel unit 5 is faulty:
if yes, ending;
if not, the controller 1 controls the diesel engine set 5 to supply power to the motor 3.
Specifically, in step a1, the controller 1 determines whether the power unit 4 is faulty, and controls the power unit 4 or the inverter unit 6 to supply power to the motor 3 according to the determination result.
Further, a step A3 may be included, when the controller 1 determines that the diesel engine set 5 is faulty in the step a2, the step A3 controls the motor 3 to put down the heavy object and move the heavy object to the maintenance point, so as to implement the function of "no-load transition".
In a preferred embodiment of the present invention, a master power unit 41 and a slave power unit 42 are provided in the power unit 4;
step a1, as shown in fig. 5, includes:
step a11, the controller 1 determines whether the main power unit 41 has a fault:
if yes, go to step A12;
if not, the controller 1 controls the main power unit 41 to supply power to the motor 3;
step a12, the controller 1 determines whether the slave power unit 42 is faulty:
if yes, go to step A2;
if not, the controller 1 controls the power unit 42 to supply power to the motor 3.
Specifically, in step a11, the control unit 13 drives the main power battery pack 411 and closes the second switch 412 to supply power to the motor 3 by the main power unit 41, in step a12, the control unit 13 drives the driven power battery pack 421 and closes the first switch 423 to supply power to the motor 3 by the power unit 42, and in step a13, the control unit 13 drives the diesel engine 51 and closes the third switch 53 to supply power to the motor 3 by the diesel engine unit 5.
In a preferred embodiment of the present invention, an inverter group 6 connected to the dc bus 2 is disposed on the dc bus 2,
a power supply group 7 for supplying power to the controller 1 is arranged on the controller 1, the input end of the power supply group 7 is respectively connected with the direct current bus 2, the diesel engine unit 5 and the inversion group 6, and the output end of the power supply group 7 is connected with the controller 1;
the control method further comprises a second procedure of controlling the power supply of the power supply set 7, as shown in fig. 6:
step B1, the controller 1 determines whether the diesel unit 5 is faulty:
if yes, go to step B2;
if not, the controller 1 controls the diesel engine set 5 to supply power to the power supply set 7;
step B2, the controller 1 determines whether the inverter group 6 has a fault:
if yes, ending;
if not, the controller 1 controls the inverter group 6 to supply power to the power supply group 7.
Specifically, the control unit 13 performs different power supply controls according to the operating states of the diesel engine set 5 and the inverter set 6, respectively, in step B1, the controller 1 controls the diesel engine set 5 to supply power to the power supply set 7, and in step B2, the controller 1 controls the inverter set 6 to supply power to the power supply set 7.
In a preferred embodiment of the present invention, a storage battery 75 is disposed in the power supply set 7, an output end of the storage battery 75 is connected to an output end of the power supply set 7, and an electric quantity threshold is disposed in the storage battery 75;
the control method includes a third process of charging the battery pack 75, as shown in fig. 7:
in step C1, the controller 1 determines whether the electric quantity value of the battery pack 75 is smaller than the electric quantity threshold:
if yes, go to step C2;
if not, ending;
in step C2, the controller 1 determines whether the diesel engine 51 is faulty:
if yes, go to step C3;
if not, the controller 1 controls the diesel engine 51 to charge the storage battery;
step C3, the controller 1 determines whether the inverter group 6 has a fault:
if yes, ending;
if not, the controller 1 controls the inverter group 6 to charge the storage battery.
Specifically, the control unit 13 performs different charging controls according to the electric quantity value of the storage battery pack 75 and the operating states of the diesel engine set 5 and the inverter set 6, respectively, in step C2, the controller 1 controls the diesel engine set 5 to charge the storage battery through the battery charger 76, and in step C3, the controller 1 controls the inverter set 6 to charge the storage battery through the battery charger 76.
In a preferred embodiment of the invention, a load 8 is arranged in the hybrid power control system, and the load 8 is respectively connected with the inversion set 6 and the diesel engine set 5;
the control method includes a fourth process of supplying power to the load 8, as shown in fig. 8:
step D1, the controller 1 determines whether the inverter group 6 has a fault:
if yes, go to step D2;
if not, the controller 1 controls the inversion group 6 to supply power to the load 8;
step D2, the controller 1 determines whether the diesel unit 5 is faulty:
if yes, go to step D3;
if not, the controller 1 controls the diesel unit 5 to supply power to the load 8.
Specifically, the load 8 is an electric power consumption device during operation, and includes devices such as an interphone, an illumination lamp, an air conditioner, a fan, and a display screen.
The system can be divided into two power supply processes of external equipment in power supply, the first power supply process is a process that the controller 1 supplies power to the motor 3 through controlling the power unit 4 and the diesel unit 5 through the direct current bus 2, the process can realize moving heavy objects and is also a main power supply process of the system, the second power supply process is a process that the controller 1 supplies power to the load 8, and the process belongs to auxiliary power supply in a process that a worker operates the motor 3 to move equipment, so that the worker can operate the machine equipment more conveniently.
The controller 1 controls different loads 8 according to the working states of the diesel engine set 5 and the inverter set 6, in step D1, the controller 1 controls the inverter set 6 to supply power to the power supply set 7, where the voltage of the inverter set 6 is from the voltage on the dc bus 2, and may supply power to the main power unit 41 for the dc bus 2 or may supply power to the dc bus 2 from the power unit 42, and in step D2, the controller 1 controls the diesel engine set 5 to supply power to the power supply set 7.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (8)

1. A hybrid control system is characterized in that the hybrid control system is connected with at least one external motor through a direct current bus and is used for controlling the motor;
the hybrid power control system comprises a power unit and a diesel unit which are respectively connected with the direct current bus;
the hybrid power control system further comprises:
a controller, said controller comprising:
the first acquisition unit is respectively connected with the power unit and the diesel unit through a plurality of communication lines and is used for acquiring the working states of the power unit and the diesel unit;
the first judgment unit is connected with the first acquisition unit and is used for acquiring the working state and judging to obtain a first judgment result;
the first control unit is connected with the first judging unit and used for controlling the power unit and the diesel unit in a preset first sequence according to the first judging result and supplying power to the motor through the direct current bus;
the first sequence comprises:
when the hybrid power control system is in an initial state, firstly, the power unit is adopted to supply power to the motor;
when the first judging unit judges that the power unit fails according to the working state of the power unit, the hybrid power control system controls the power unit to stop supplying power to the motor, and meanwhile, the diesel unit is adopted to supply power to the motor;
the hybrid power control system further comprises:
an inversion set connected with the DC bus for obtaining the electric quantity on the DC bus,
the input end of the power supply group is respectively connected with the direct current bus, the diesel engine set and the inversion group, and the output end of the power supply group is connected with the controller and used for supplying power to the controller;
the power supply set comprises:
the output end of the storage battery pack is connected with the output end of the power supply set, and an electric quantity threshold value is arranged in the storage battery pack;
the hybrid power control system further comprises:
the third acquisition unit is connected with the inversion group, the diesel engine unit and the storage battery pack through a plurality of communication lines and is used for acquiring the working states of the inversion group and the diesel engine unit and the electric quantity value of the storage battery pack;
the third judgment unit is connected with the third acquisition unit and is used for acquiring the working state and the electric quantity value and judging to obtain a third judgment result;
the third control unit is connected with the third judging unit and used for controlling the diesel engine set and the inverter set to charge the storage battery pack according to a third preset sequence according to a third judging result;
the third sequence comprises:
when the hybrid power control system is in an initial state and the electric quantity value is smaller than the electric quantity threshold value, firstly, the diesel engine set is adopted to charge the storage battery pack;
when the third judging unit judges that the diesel engine set has a fault according to the working state of the diesel engine set, the hybrid power control system controls the diesel engine set to stop charging the storage battery set, and meanwhile, the inversion set is adopted to charge the storage battery set.
2. A hybrid control system as set forth in claim 1 wherein said power pack includes:
the main power unit is used for supplying power to the motor through the direct current bus;
the driven power unit is used for supplying power to the motor through the direct current bus;
the first sequence further comprises:
when the hybrid power control system is in an initial state, firstly, a main power unit in the power units is adopted to supply power to the motor;
when the first judging unit judges that the main power unit fails according to the working state of the main power unit, the hybrid power control system controls the main power unit to stop supplying power to the motor, and meanwhile, the driven power unit is adopted to supply power to the motor.
3. A hybrid control system as set forth in claim 1, further comprising:
the second acquisition unit is connected with the diesel engine set and the inversion set through a plurality of communication lines and is used for acquiring the working states of the inversion set and the diesel engine set;
the second judgment unit is connected with the second acquisition unit and is used for acquiring the working state and judging to obtain a second judgment result;
the second control unit is connected with the second judgment unit and used for controlling the inversion set and the diesel set according to a second preset sequence according to a second judgment result and supplying power to the power supply set;
the second sequence comprises:
when the hybrid power control system is in an initial state, firstly, the diesel engine set is adopted to supply power to the power supply set;
when the second judging unit judges that the diesel engine set fails according to the working state of the diesel engine set, the hybrid power control system controls the diesel engine set to stop supplying power to the power supply set, and meanwhile, the inversion set is adopted to supply power to the power supply set.
4. A hybrid control system as set forth in claim 1, further comprising:
the first input end of the load is connected with the inversion set, and the second input end of the load is connected with the diesel engine set;
the hybrid power control system further comprises:
the fourth acquisition unit is connected with the diesel engine set and the inversion set through a plurality of communication lines and is used for acquiring the working states of the inversion set and the diesel engine set;
the fourth judgment unit is connected with the fourth acquisition unit and is used for acquiring the working state and judging to obtain a fourth judgment result;
the fourth control unit is connected with the fourth judging unit and used for controlling the inversion set and the diesel set according to a preset fourth sequence according to a fourth judging result and supplying power to the load;
the fourth sequence comprises:
when the hybrid power control system is in an initial state, firstly, the inverter group is adopted to supply power to the load;
when the fourth judging unit judges that the inversion group has a fault according to the working state of the inversion group, the hybrid power control system controls the inversion group to stop supplying power to the load, and meanwhile, the diesel engine set is adopted to supply power to the load.
5. A hybrid control method for supplying power to an electric motor applied to a hybrid control system according to any one of claims 1 to 4, wherein the electric motor is connected to a dc bus;
a power unit and a diesel unit which are connected with the direct current bus are arranged on the direct current bus;
the controller is respectively connected with the power unit and the diesel unit;
the control method includes a first process of controlling power supply to the motor:
step A1, the controller judges whether the power unit is in fault:
if yes, go to step A2;
if not, the controller controls the power unit to supply power to the motor;
step A2, the controller judges whether the diesel engine set is in fault:
if yes, ending;
if not, the controller controls the diesel engine group to supply power to the motor;
an inversion group connected with the direct current bus is arranged on the direct current bus,
a power supply group for supplying power to the controller is arranged on the controller, the input end of the power supply group is respectively connected with the direct current bus, the diesel engine set and the inversion group, and the output end of the power supply group is connected with the controller;
arranging a storage battery pack in the power supply group, wherein the output end of the storage battery pack is connected with the output end of the power supply group, and an electric quantity threshold value is arranged in the storage battery pack;
the control method includes a third process of charging the secondary battery pack:
step C1, the controller determines whether the electric quantity value of the battery pack is less than the electric quantity threshold:
if yes, go to step C2;
if not, ending;
step C2, the controller judges whether the diesel engine has a fault:
if yes, go to step C3;
if not, the controller controls the diesel engine to charge the storage battery;
step C3, the controller determines whether the inverter group is faulty:
if yes, ending;
if not, the controller controls the inversion group to charge the storage battery.
6. A hybrid control method according to claim 5, wherein a master power unit and a slave power unit are provided in the power unit;
the step A1 includes:
step a11, the controller determines whether the main power unit is faulty:
if yes, go to step A12;
if not, the controller controls the main power unit to supply power to the motor;
step A12, the controller judges whether the slave power unit is in fault:
if yes, go to step A2;
and if not, the controller controls the driven power unit to supply power to the motor.
7. A hybrid control method according to claim 5,
the control method further comprises a second process of controlling the power supply set to supply power:
step B1, the controller judges whether the diesel engine set is in fault:
if yes, go to step B2;
if not, the controller controls the diesel engine set to supply power to the power supply set;
step B2, the controller determines whether the inverter group is faulty:
if yes, ending;
if not, the controller controls the inversion group to supply power to the power supply group.
8. The hybrid control method according to claim 5, wherein a load is provided in the hybrid control system, and the load is connected to the inverter group and the diesel engine group respectively;
the control method includes a fourth process of supplying power to the load:
step D1, the controller determines whether the inverter group is faulty:
if yes, go to step D2;
if not, the controller controls the inversion group to supply power to the load;
step D2, the controller judges whether the diesel engine set is in fault:
if yes, go to step D3;
and if not, the controller controls the diesel engine set to supply power to the load.
CN202010068792.1A 2020-01-21 2020-01-21 Hybrid power control system and method Active CN111277038B (en)

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Address after: 201210 3rd floor, building 1, No.400, Fangchun Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai

Patentee after: Chengrui Power Technology (Shanghai) Co.

Address before: 201315 3rd floor, building 1, No.400, Fangchun Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai

Patentee before: CHENGRUI ELECTRIC POWER TECHNOLOGY (SHANGHAI) CO.,LTD.