CN116081487B - Energy storage type energy saving control method and control system - Google Patents

Energy storage type energy saving control method and control system Download PDF

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Publication number
CN116081487B
CN116081487B CN202310372346.3A CN202310372346A CN116081487B CN 116081487 B CN116081487 B CN 116081487B CN 202310372346 A CN202310372346 A CN 202310372346A CN 116081487 B CN116081487 B CN 116081487B
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China
Prior art keywords
power supply
frequency converter
direct current
current power
energy storage
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Application number
CN202310372346.3A
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Chinese (zh)
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CN116081487A (en
Inventor
林凯明
杨鑫
李曙
彭成淡
雷勇利
林邓添
张洪升
黄文�
罗荣桢
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GUANGDONG INSTITUTE OF SPECIAL EQUIPMENT INSPECTION AND RESEARCH ZHONGSHAN BRANCH
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GUANGDONG INSTITUTE OF SPECIAL EQUIPMENT INSPECTION AND RESEARCH ZHONGSHAN BRANCH
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Priority to CN202310372346.3A priority Critical patent/CN116081487B/en
Publication of CN116081487A publication Critical patent/CN116081487A/en
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Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1415—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with a generator driven by a prime mover other than the motor of a vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
    • H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention relates to the technical field of energy conservation, and discloses an energy storage type energy conservation control method and a control system, wherein the method comprises the following steps: detecting whether the bus voltage of the frequency converter is larger than a charging trigger voltage value; if yes, judging that the crane works in a power generation mode; detecting whether the current energy storage battery is in a chargeable state; if yes, the busbar voltage of the frequency converter is output to a bidirectional direct current power supply; after the bidirectional direct current power supply carries out step-down treatment on the busbar voltage of the frequency converter, the bidirectional direct current power supply is controlled to output the step-down busbar voltage of the frequency converter to the energy storage battery. By implementing the embodiment of the invention, the energy storage type energy saving effect can be realized.

Description

Energy storage type energy saving control method and control system
Technical Field
The invention relates to the technical field of energy conservation, in particular to an energy storage type energy conservation control method and a control system.
Background
At present, most of lifting motors on common medium-large cranes in the market are driven by frequency converters, and work under two working conditions of electric power and power generation in an alternating mode along with lifting of a heavy object, and particularly, the lifting motors are very large in consumption of electric energy and large in potential energy released by lowering of the heavy object because of large carrying capacity and different counterweight electricity saving of an elevator are caused, so that the braking resistor generates very serious heat.
Through research such as inquiring current patent, current hoist generally uses brake resistance to be used for consuming the electric energy that the heavy object descends in-process and produces, also has the hoist that uses four quadrant converter, nevertheless has following problem: (1) the resistor is braked to cause energy waste, heat dissipation is needed to be carried out on the resistor, and electric energy compensation is not needed when the resistor is started, so that the impact on a power grid is large; (2) the four-quadrant frequency converter has the problems of high cost, no immediate consumption of the power of the inversion feed network, no economic benefit, power grid harmonic pollution and the like.
Disclosure of Invention
The embodiment of the invention discloses an energy storage type energy saving control method and a control system, which can realize the energy storage type energy saving effect.
The first aspect of the embodiment of the invention discloses an energy storage type energy saving control method, which comprises the following steps:
detecting whether the bus voltage of the frequency converter is larger than a charging trigger voltage value; if yes, judging that the crane works in the power generation mode;
detecting whether the current energy storage battery is in a chargeable state; if yes, the busbar voltage of the frequency converter is output to a bidirectional direct current power supply;
and after the bidirectional direct current power supply carries out step-down treatment on the busbar voltage of the frequency converter, controlling the bidirectional direct current power supply to output the step-down busbar voltage of the frequency converter to the energy storage battery.
As another optional implementation manner, in the first aspect of the embodiment of the present invention, the method further includes:
detecting whether the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value; if yes, detecting whether the output end of the bidirectional direct current power supply has no load characteristic; wherein the charge trigger voltage value is greater than the discharge trigger voltage value;
and if the no-load characteristic of the output end of the bidirectional direct current power supply is detected, judging that the frequency converter is in a closed state, and controlling the bidirectional direct current power supply to stop working.
As another optional implementation manner, in the first aspect of the embodiment of the present invention, the method further includes:
if the load equipment is detected to be at the output end of the bidirectional direct current power supply, judging that the crane is in an electric mode currently;
detecting whether the energy storage battery is in a non-electroless state at present; if yes, outputting the battery voltage in the energy storage battery to the bidirectional direct current power supply;
after the battery voltage is subjected to boosting treatment on the bidirectional direct current power supply, outputting the boosted battery voltage to the frequency converter; the battery voltage after boosting is smaller than the standby voltage value of the bus of the frequency converter.
As another optional implementation manner, in the first aspect of the embodiment of the present invention, after the outputting the boosted battery voltage to the frequency converter, the method further includes:
detecting whether the energy storage battery is changed from an electrified state to an unpowered state; if yes, the bidirectional direct current power supply is controlled to stop working.
As another optional implementation manner, in the first aspect of the embodiment of the present invention, after the controlling the bidirectional dc power supply to output the stepped-down bus voltage of the inverter to the energy storage battery, the method further includes:
detecting whether the energy storage battery is changed from a chargeable state to a non-chargeable state at present; if yes, controlling the bidirectional direct current power supply to stop working;
detecting whether the busbar voltage of the frequency converter reaches a braking resistor intervention trigger voltage value or not; if yes, the busbar voltage of the frequency converter is output to a braking resistor.
As another optional implementation manner, in the first aspect of the embodiment of the present invention, the method further includes:
the intervention trigger voltage value of the brake resistor is larger than the charging trigger voltage value.
A second aspect of an embodiment of the present invention discloses a control system, including:
The first detection unit is used for detecting whether the bus voltage of the frequency converter is larger than a charging trigger voltage value;
the first determining unit is used for judging that the crane works in the power generation mode when the first detecting unit detects that the bus voltage of the frequency converter is larger than the charging trigger voltage value;
the second detection unit is used for detecting whether the current energy storage battery is in a chargeable state or not;
the first output unit is used for outputting the bus voltage of the frequency converter to a bidirectional direct current power supply when the second detection unit detects that the current energy storage battery is in a chargeable state;
the first control unit is used for controlling the bidirectional direct current power supply to output the stepped down busbar voltage of the frequency converter to the energy storage battery after the bidirectional direct current power supply steps down the busbar voltage of the frequency converter.
As another alternative implementation manner, in the second aspect of the embodiment of the present invention, the control system further includes:
the first detection unit is further used for detecting whether the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value;
the third detection unit is used for detecting whether the output end of the bidirectional direct current power supply has no load characteristic or not when the first detection unit detects that the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value; wherein the charge trigger voltage value is greater than the discharge trigger voltage value;
And the determining and controlling unit is used for judging that the frequency converter is in a closed state when the third detecting unit detects the no-load characteristic of the output end of the bidirectional direct current power supply, and controlling the bidirectional direct current power supply to stop working.
As another alternative implementation manner, in the second aspect of the embodiment of the present invention, the control system further includes:
the first determining unit is further configured to determine that the crane is currently in an electric mode when the third detecting unit detects that the output end of the bidirectional direct current power supply has load equipment;
the second detection unit is further used for judging whether the energy storage battery is in a non-electroless state at present;
the second output unit is used for outputting the battery voltage in the energy storage battery to the bidirectional direct current power supply when the second detection unit detects that the energy storage battery is in a non-electroless state currently;
the third output unit is used for outputting the boosted battery voltage to the frequency converter after boosting the battery voltage on the bidirectional direct current power supply; the battery voltage after boosting is smaller than the standby voltage value of the bus of the frequency converter.
A third aspect of an embodiment of the present invention discloses a control system, including:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to execute the energy-storage type energy-saving control method disclosed in the first aspect of the embodiment of the invention.
A fourth aspect of the embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to execute a method for controlling energy saving according to the first aspect of the embodiment of the present invention.
A fifth aspect of the embodiments of the present invention discloses a computer program product which, when run on a computer, causes the computer to perform part or all of the steps of any one of the energy storage energy saving control methods of the first aspect.
A sixth aspect of the embodiments of the present invention discloses an application publishing platform for publishing a computer program product, wherein the computer program product, when run on a computer, causes the computer to perform part or all of the steps of any one of the energy storage energy saving control methods of the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, whether the bus voltage of the frequency converter is larger than a charging trigger voltage value is detected; if yes, judging that the crane works in the power generation mode; detecting whether the current energy storage battery is in a chargeable state; if yes, the busbar voltage of the frequency converter is output to a bidirectional direct current power supply; and after the bidirectional direct current power supply carries out step-down treatment on the busbar voltage of the frequency converter, controlling the bidirectional direct current power supply to output the step-down busbar voltage of the frequency converter to the energy storage battery. Therefore, the embodiment of the invention can realize the energy storage type energy saving effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of an energy storage type energy saving control method disclosed in an embodiment of the invention;
FIG. 2 is a schematic flow chart of another energy-saving control method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another control system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another control system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present invention are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the application discloses an energy storage type energy saving control method and a control system, which can realize the energy storage type energy saving effect.
The following detailed description refers to the accompanying drawings.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of an energy-saving control method according to an embodiment of the application. As shown in fig. 1, the energy storage type energy saving control method may include the following steps.
101. The control system detects whether the bus voltage of the frequency converter is larger than a charging trigger voltage value, if yes, step 102-step 103 are executed, and if not, the process is ended.
In the embodiment of the application, a circulating voltage detection module can be contained in the bidirectional direct current power supply, the control system can compare the detected bus voltage value of the frequency converter of the crane with a set threshold value, when the detected bus voltage value VH is more than or equal to the charging trigger voltage VHH, the system can judge that the crane works in a power generation mode, when the detected bus voltage value VH is less than or equal to the discharging trigger voltage VHL, and when the bidirectional direct current power supply detects the boosting output no-load characteristic, the system can judge that the crane works in an electric mode.
As an optional implementation manner, in the embodiment of the application, the bidirectional direct current power supply can contain an isolated high-voltage sampling circuit, a singlechip in a control system samples through the sampling circuit, and after calculation and analysis by a program, the bidirectional direct current power supply can realize boosting or reducing operation through devices and circuits such as an IGBT and the like.
102. The control system judges that the crane works in a power generation mode.
103. The control system detects whether the current energy storage battery is in a chargeable state, if so, step 104-step 105 are executed, and if not, the process is ended.
104. The control system outputs the busbar voltage of the frequency converter to the bidirectional direct current power supply.
105. After the bidirectional direct current power supply carries out step-down treatment on the bus voltage of the frequency converter, the control system controls the bidirectional direct current power supply to output the step-down bus voltage of the frequency converter to the energy storage battery, and the flow is ended.
In the embodiment of the invention, the system can utilize a bidirectional direct current power supply to reduce the voltage value of the high-voltage frequency converter bus to the voltage value of the low-voltage battery so as to realize the charging of the energy storage battery.
In an alternative implementation manner, in the embodiment of the present invention, when the crane is operating in the power generation mode, the first condition affecting the voltage reduction operation condition of the bidirectional dc power supply is already provided, at this time, the control system may detect the electric quantity of the energy storage battery at the same time, and when the electric quantity is in a chargeable or non-full state, the system may identify that the second condition is also provided, at this time, the system may control the bidirectional dc power supply to operate in the voltage reduction mode, and obtain the electric energy (the potential energy is converted into the electric energy) from the converter bus to output the electric energy from the crane weight to the bidirectional dc power supply, so that the bidirectional dc power supply performs the voltage reduction operation, and charges the energy storage battery.
As an alternative implementation manner, in the embodiment of the application, if special working conditions are met, such as continuous high-place cargo carrying and discharging, the energy storage battery is full of electricity, the system can prohibit the bidirectional direct current power supply from charging the battery, overcharge is avoided, and the generated electricity can be consumed by the brake resistor.
As an optional implementation manner, in the embodiment of the application, while energy is released and stored in the energy storage battery, the control system can monitor the state of the energy storage battery pack at any time to scientifically manage the charge and discharge state, and can display the battery state, the bidirectional direct current power supply state and key parameters on a touch screen which is in communication connection with the control system while protecting the battery pack, and meanwhile, a user can set the upper limit voltage, the lower limit voltage, the current and the like of charge and discharge through the touch screen; and the system can automatically adjust the charge and discharge current within the upper limit of the current according to the load capacity of the crane, namely the power consumption.
In an embodiment of the present application, the system may monitor the state of the energy storage battery at any time and provide the analyzed key information to the bi-directional dc power supply and the touch screen communicatively connected to the control system, so that the charging and discharging of the battery of the present application may be affected by the input information to prevent overdischarge, overcharge, current control, etc., and provide an optimal charging and discharging curve based on preventing damage to the battery.
In the embodiment of the application, a breaker and a fuse can be connected between the bidirectional direct current power supply and the frequency converter in series, so that the frequency converter can be protected from damage and the like under extreme conditions, and meanwhile, the breaker can be manually switched on and off, thereby being convenient for connecting the bidirectional direct current power supply and the frequency converter by manual breaking; meanwhile, the energy storage battery side can be connected with a fuse in series, so that the protection effect is achieved.
As an optional implementation manner, in the embodiment of the application, a breaker and a fuse can be connected between the bidirectional direct current power supply and the frequency converter in series, the breaker can realize overcurrent protection, and also can realize connection of a manual breaking system and the frequency converter, and the fuse is also used for protecting overcurrent protection on two sides of the bidirectional direct current power supply; when the system is in short circuit fault or abnormal overcurrent occurs, the breaker is automatically opened, so that the frequency converter is prevented from being burnt.
As an alternative implementation manner, in the embodiment of the present application, when the hoisting motor is in the power generation mode (the heavy object is put down), the bus voltage of the frequency converter rises, the bidirectional direct current power supply can perform the step-down operation, and energy is obtained from the bus voltage of the frequency converter and stored in the energy storage battery through the circuit breaker and the fuse.
As an optional implementation manner, in the embodiment of the present application, the control system may be integrated with a communication interface, a device signal lamp interface, an internet of things module, a touch screen interface, etc., some key parameters in battery management may be input through the touch screen, and status information may also be displayed through the touch screen, so as to provide a good man-machine interaction interface. The field personnel can simply acquire the state of the equipment (fault, energy saving, maintenance and emergency stop) through the status lamp on the equipment top. Besides on-site observation equipment, the system is integrated with the Internet of things module, and can be used for remote monitoring and system setting.
As an optional implementation manner, in the embodiment of the application, the system comprises a control board, and a device signal lamp output circuit, an Internet of things circuit, a touch screen circuit and the like are integrated inside the system, so that related functions can be realized, and a complete system is formed.
As an optional implementation manner, in the embodiment of the application, the device can be conveniently and quickly monitored, set, failed, known in state and the like on site and remotely, and the dead halt automatic reset function is integrated. The application can also carry out quick transformation and upgrading on the delivered variable frequency crane.
In the energy storage type energy saving control method of fig. 1, a control system is described as an execution subject. It should be noted that, the execution body of the energy storage type energy saving control method of fig. 1 may also be a stand-alone device associated with the control system, which is not limited by the embodiment of the present invention.
It can be seen that implementing the energy-storage type energy-saving control method described in fig. 1 can achieve the energy-storage type energy-saving effect.
In addition, the implementation of the energy storage type energy-saving control method described in fig. 1 can store electric energy generated by potential energy when the jack descends a heavy object, so that electric energy waste is reduced, and the purpose of energy saving is achieved.
Example two
Referring to fig. 2, fig. 2 is a flow chart of another energy-saving control method according to an embodiment of the invention. As shown in fig. 2, the energy storage type energy saving control method may include the steps of:
201. the control system detects whether the bus voltage of the frequency converter is greater than the charging trigger voltage value, if yes, step 202 to step 203 are executed, and if not, step 210 is executed.
202. The control system judges that the crane works in a power generation mode.
203. The control system detects whether the current energy storage battery is in a chargeable state, if so, the control system executes the steps 204-206, and if not, the process is ended.
204. The control system outputs the busbar voltage of the frequency converter to the bidirectional direct current power supply.
205. After the bidirectional direct current power supply carries out step-down treatment on the bus voltage of the frequency converter, the control system controls the bidirectional direct current power supply to output the step-down bus voltage of the frequency converter to the energy storage battery.
206. The control system detects whether the current energy storage battery is changed from a chargeable state to a non-chargeable state, if so, the control system executes the steps 207 to 208, and if not, the process is ended.
As an alternative implementation manner, in the embodiment of the present application, the state detection of the energy storage battery may be determined both before and during charging. The principle of the application for detecting the charge and discharge is that the battery is not charged when full electricity is provided and the battery is not discharged when empty. If the battery is judged after full charge, the battery is damaged (overcharged). The overdischarge is the same.
207. The control system controls the bidirectional direct current power supply to stop working.
208. The control system detects whether the bus voltage of the frequency converter reaches the trigger voltage value of the brake resistor intervention, if yes, step 209 is executed, and if not, the flow is ended.
209. And the control system outputs the busbar voltage of the frequency converter to the brake resistor, and the process is ended.
As an optional implementation manner, in the embodiment of the application, when the battery is full during charging of the energy storage battery, the system can control the bidirectional direct current power supply to stop charging the energy storage battery, and the bus voltage of the frequency converter which is just pulled down to a certain extent by the bidirectional direct current power supply has a rising trend, and the system can control the braking resistor to automatically intervene so as to consume energy by heat energy.
As an alternative implementation, in the embodiment of the present application, if the energy storage battery is full before the system starts to charge, the system may directly burn the electric energy generated by the potential energy reduction with heat energy through the brake resistor.
210. The control system detects whether the busbar voltage of the frequency converter is smaller than the discharge trigger voltage value, if yes, step 211 is executed, and if not, the flow is ended.
In the embodiment of the application, the charge trigger voltage value is larger than the discharge trigger voltage value.
In the embodiment of the application, when the detected bus voltage value VH is less than or equal to the discharge trigger voltage VHL, the system can judge that the crane works in an electric mode.
In the embodiment of the application, when the crane works in the electric mode, the first condition affecting the boosting operation of the bidirectional direct current power supply is already provided, the control system can detect the electric quantity of the energy storage battery, when the energy storage battery is in a non-power-free state, the system can identify that the second condition of the boosting operation of the bidirectional direct current power supply is provided, at the moment, the system can extract energy from the energy storage battery pack and perform the boosting operation through the bidirectional direct current power supply, so that the bus voltage of the frequency converter is raised, the electric quantity of the frequency converter for taking electricity from the mains supply is reduced, and the energy saving is realized.
211. The control system detects whether the output end of the bidirectional direct current power supply has no load characteristic, if so, step 212 is executed, and if not, step 213-step 214 are executed.
212. The control system judges that the frequency converter is in a closed state and controls the bidirectional direct current power supply to stop working, and the process is ended.
As an optional implementation manner, in the embodiment of the present application, the braking resistor intervention trigger voltage value VHR > the charging trigger voltage value VHH of the present application can ensure that the present system starts the charging operation mechanism before the intervention of the original braking resistor.
In an embodiment of the present application, when the system is in a power generation operation condition, the battery voltage is raised, and the boosted battery voltage is smaller than the standby voltage value of the bus of the frequency converter, so as to ensure that the bus voltage is not raised too high. Meanwhile, after the frequency converter is powered down, the bus voltage gradually drops, when the voltage of the frequency converter is lower than the discharge trigger voltage VHL, and the output end no-load characteristic of the bidirectional direct current power supply is detected when the bus voltage is slightly pulled up, the system can judge that the frequency converter is powered down, the direct current power supply can not perform boosting operation at the moment, and the bus voltage is ensured not to be lifted at the moment.
213. The control system judges that the crane is currently in an electric mode.
214. The control system detects whether the current energy storage battery is in a non-electroless state, if so, step 215 to step 217 are executed, and if not, the current flow is ended.
215. The control system outputs the battery voltage in the energy storage battery to the bidirectional direct current power supply.
216. After the battery voltage is boosted on the bidirectional direct current power supply, the control system outputs the boosted battery voltage to the frequency converter; the boosted battery voltage is smaller than the standby voltage value of the bus of the frequency converter.
217. The control system detects whether the energy storage battery is changed from the powered state to the unpowered state, if so, step 218 is executed, and if not, the process is ended.
As an alternative implementation manner, in the embodiment of the present application, during the boosting (battery discharging) process, the present application can also detect the battery power, and the boosting (not discharging) is not performed when the battery is not powered, so as to prevent overdischarge. Charging is the same.
218. And the control system controls the bidirectional direct current power supply to stop working, and the process is ended.
As an alternative implementation manner, in the embodiment of the application, if the battery power is exhausted during the boosting process, the system can control the bidirectional direct current power supply to stop the boosting operation so as to prevent the battery from being over-discharged, and at this time, the potential energy lifted by the crane can come from the mains supply.
As an alternative implementation manner, in the embodiment of the present application, if the battery is not powered before the boosting operation, the system may control the bi-directional dc power supply to remain standby, and directly obtain all the energy sources from the mains supply to supply the crane for lifting.
As an alternative implementation manner, in the embodiment of the present application, the voltage relationship in the present application is as follows: the brake resistor intervenes in trigger voltage VHR > charging trigger voltage VHH > converter bus standby voltage VDJ > and voltage VFD > after the converter bus is pulled up > discharging trigger voltage VHL.
As an optional implementation mode, in the embodiment of the application, the electric energy of the power generation working condition can be stored, the electric working condition is released, the energy saving effect is realized, meanwhile, the impact on the power grid at the moment of starting the crane is reduced, the braking resistor does not generate heat (the battery can completely absorb the generated power, the battery is full under the non-extreme working condition and cannot absorb the energy), and the heat dissipation requirement is reduced.
In the embodiment of the application, as an optional implementation manner, the application can provide possibility for the enterprise to increase the capacity of the power supply system under the condition of multiple machine application scenes and without expanding the capacity of the power supply system.
It can be seen that the energy-saving control method of the energy storage type described in fig. 2 can be implemented to achieve the energy-saving effect of the energy storage type.
In addition, another energy storage type energy saving control method described in fig. 2 is implemented, so that the electric energy in the power generation working condition can be stored and the electric energy in the electric working condition can be released, and the energy saving effect is realized.
In addition, by implementing another energy storage type energy saving control method described in fig. 2, impact on a power grid at the moment of starting a crane can be reduced, and heat dissipation requirements are reduced.
Example III
Referring to fig. 3, fig. 3 is a schematic structural diagram of a control system according to an embodiment of the invention. As shown in fig. 3, the control system 300 may include a first detection unit 301, a first determination unit 302, a second detection unit 303, a first output unit 304, and a first control unit 305, wherein:
the first detecting unit 301 is configured to detect whether the bus voltage of the frequency converter is greater than a charging trigger voltage value.
The first determining unit 302 is configured to determine that the crane is operating in the power generation mode when the first detecting unit detects that the bus voltage of the frequency converter is greater than the charging trigger voltage value.
A second detecting unit 303, configured to detect whether the current energy storage battery is in a chargeable state.
The first output unit 304 is configured to output the bus voltage of the inverter to the bidirectional dc power supply when the second detection unit detects that the current energy storage battery is in a chargeable state.
The first control unit 305 is configured to control the bidirectional dc power supply to output the stepped-down converter bus voltage to the energy storage battery after the bidirectional dc power supply steps down the converter bus voltage.
In the embodiment of the present application, a circulating voltage detection module may be included in the bidirectional dc power supply of the present application, where the first detection unit 301 compares a detected bus voltage value of the frequency converter of the crane with a set threshold value, when the detected bus voltage value VH is greater than or equal to the charging trigger voltage VHH, the first determination unit 302 may determine that the crane is operating in the power generation mode, and when the detected bus voltage value VH is less than or equal to the discharging trigger voltage VHL, and the bidirectional dc power supply detects a boost output no-load characteristic, the first determination unit 302 may determine that the crane is operating in the electric mode.
As an optional implementation manner, in the embodiment of the application, the bidirectional direct current power supply can contain an isolated high-voltage sampling circuit, a singlechip in a control system samples through the sampling circuit, and after calculation and analysis by a program, the bidirectional direct current power supply can realize boosting or reducing operation through devices and circuits such as an IGBT and the like.
In the embodiment of the present application, the first control unit 305 may utilize a bidirectional dc power supply to step down the voltage value of the high-voltage inverter bus to the voltage value of the low-voltage battery, so as to charge the energy storage battery.
As an alternative implementation manner, in the embodiment of the present invention, when the crane is operating in the power generation mode, the first condition affecting the voltage reduction operation condition of the bidirectional dc power supply is already provided, and the second detection unit 303 may detect the electric quantity of the energy storage battery at the same time, and when the electric quantity is in a chargeable or non-full state, the system may identify that the second condition is also already provided, and the first control unit 305 may control the bidirectional dc power supply to operate in the voltage reduction mode, and the first output unit 304 obtains the electric energy (the potential energy is converted into the electric energy) from the converter bus and outputs the electric energy to the bidirectional dc power supply, so that the bidirectional dc power supply performs the voltage reduction operation to charge the energy storage battery.
As an alternative implementation manner, in the embodiment of the invention, if special working conditions are met, such as continuous high-place cargo carrying and discharging, the energy storage battery is full of electricity, the system can prohibit the bidirectional direct current power supply from charging the battery, overcharge is avoided, and the generated electricity can be consumed by the brake resistor.
As an optional implementation manner, in the embodiment of the invention, while energy is released and stored in the energy storage battery, the control system can monitor the state of the energy storage battery pack at any time to scientifically manage the charge and discharge state, and can display the battery state, the bidirectional direct current power supply state and key parameters on a touch screen which is in communication connection with the control system while protecting the battery pack, and meanwhile, a user can set the upper limit voltage, the lower limit voltage, the current and the like of charge and discharge through the touch screen; and the system can automatically adjust the charge and discharge current within the upper limit of the current according to the load capacity of the crane, namely the power consumption.
In an embodiment of the present application, the system may monitor the state of the energy storage battery at any time and provide the analyzed key information to the bi-directional dc power supply and the touch screen communicatively connected to the control system, so that the charging and discharging of the battery of the present application may be affected by the input information to prevent overdischarge, overcharge, current control, etc., and provide an optimal charging and discharging curve based on preventing damage to the battery.
In the embodiment of the application, a breaker and a fuse can be connected between the bidirectional direct current power supply and the frequency converter in series, so that the frequency converter can be protected from damage and the like under extreme conditions, and meanwhile, the breaker can be manually switched on and off, thereby being convenient for connecting the bidirectional direct current power supply and the frequency converter by manual breaking; meanwhile, the energy storage battery side can be connected with a fuse in series, so that the protection effect is achieved.
As an optional implementation manner, in the embodiment of the application, a breaker and a fuse can be connected between the bidirectional direct current power supply and the frequency converter in series, the breaker can realize overcurrent protection, and also can realize connection of a manual breaking system and the frequency converter, and the fuse is also used for protecting overcurrent protection on two sides of the bidirectional direct current power supply; when the system is in short circuit fault or abnormal overcurrent occurs, the breaker is automatically opened, so that the frequency converter is prevented from being burnt.
As an alternative implementation manner, in the embodiment of the present application, when the hoisting motor is in the power generation mode (the heavy object is put down), the bus voltage of the frequency converter rises, the bidirectional direct current power supply can perform the step-down operation, and energy is obtained from the bus voltage of the frequency converter and stored in the energy storage battery through the circuit breaker and the fuse.
As an optional implementation manner, in the embodiment of the present application, the control system may be integrated with a communication interface, a device signal lamp interface, an internet of things module, a touch screen interface, etc., some key parameters in battery management may be input through the touch screen, and status information may also be displayed through the touch screen, so as to provide a good man-machine interaction interface. The field personnel can simply acquire the state of the equipment (fault, energy saving, maintenance and emergency stop) through the status lamp on the equipment top. Besides on-site observation equipment, the system is integrated with the Internet of things module, and can be used for remote monitoring and system setting.
As an optional implementation manner, in the embodiment of the application, the system comprises a control board, and a device signal lamp output circuit, an Internet of things circuit, a touch screen circuit and the like are integrated inside the system, so that related functions can be realized, and a complete system is formed.
As an optional implementation manner, in the embodiment of the application, the device can be conveniently and quickly monitored, set, failed, known in state and the like on site and remotely, and the dead halt automatic reset function is integrated. The application can also carry out quick transformation and upgrading on the delivered variable frequency crane.
It can be seen that implementing the control system described in fig. 3 can achieve energy storage type energy saving effects.
In addition, the control system described in fig. 3 is implemented, so that electric energy generated by potential energy when the jack descends a heavy object can be stored, electric energy waste is reduced, and the purpose of energy saving is achieved.
Example IV
Referring to fig. 4, fig. 4 is a schematic structural diagram of another control system according to an embodiment of the present application. Wherein the control system of fig. 4 is optimized by the control system of fig. 3. Compared to the control system of fig. 3, the control system of fig. 4 further comprises:
as an alternative implementation manner, in an embodiment of the present application, the first detection unit 301 is further configured to detect whether the bus voltage of the frequency converter is less than the discharge trigger voltage value.
A third detecting unit 306, configured to detect whether the output end of the bidirectional dc power supply has no load characteristic when the first detecting unit 301 detects that the bus voltage of the frequency converter is less than the discharge trigger voltage value; wherein the charge trigger voltage value is greater than the discharge trigger voltage value.
And the determining and controlling unit 307 is configured to determine that the frequency converter is in a closed state when the third detecting unit 306 detects that the output end of the bidirectional direct current power supply has no load characteristic, and control the bidirectional direct current power supply to stop working.
As an optional implementation manner, in the embodiment of the present application, the resistance intervention trigger voltage VHR > the charging trigger voltage VHH of the present application can ensure that the present system starts the charging operation mechanism before the intervention of the original brake resistance.
In an embodiment of the present application, when the system is in a power generation operation condition, the battery voltage is raised, and the boosted battery voltage is smaller than the standby voltage value of the bus of the frequency converter, so as to ensure that the bus voltage is not raised too high. Meanwhile, after the frequency converter is powered down, the bus voltage gradually drops, when the voltage of the frequency converter is lower than the discharge trigger voltage VHL, and the output end no-load characteristic of the bidirectional direct current power supply is detected when the bus voltage is slightly pulled up, the system can judge that the frequency converter is powered down, the direct current power supply can not perform boosting operation at the moment, and the bus voltage is ensured not to be lifted at the moment.
Compared to the control system of fig. 3, the control system of fig. 4 further comprises:
As an optional implementation manner, in this embodiment of the present invention, the first determining unit 302 is further configured to determine that the crane is currently in the electric mode when the third detecting unit 306 detects that the output end of the bidirectional dc power supply has a load device.
As an alternative implementation manner, in an embodiment of the present invention, the second detection unit 303 is further configured to detect whether the current energy storage battery is in a non-electroless state.
The second output unit 308 is configured to output the battery voltage in the energy storage battery to the bidirectional dc power supply when the second detection unit 303 detects that the current energy storage battery is in a non-electroless state.
A third output unit 309, configured to boost the battery voltage on the bidirectional dc power supply, and then output the boosted battery voltage to the frequency converter; the boosted battery voltage is smaller than the standby voltage value of the bus of the frequency converter.
In the embodiment of the invention, when the detected bus voltage value VH is less than or equal to the discharge trigger voltage VHL, the system can judge that the crane works in an electric mode.
In the embodiment of the present invention, when the crane works in the electric mode, the first condition affecting the boost operation of the bidirectional dc power supply is already provided, at this time, the second detection unit 303 may detect the electric quantity of the energy storage battery, and when the energy storage battery is in a non-power-free state, the system may determine that the second condition is provided for the boost operation of the bidirectional dc power supply, at this time, the second output unit 308 may draw energy from the energy storage battery pack, and perform the boost operation through the bidirectional dc power supply, thereby raising the bus voltage of the frequency converter, reducing the electric quantity of the frequency converter for obtaining electricity from the mains supply, and realizing energy saving.
Compared to the control system of fig. 3, the control system of fig. 4 further comprises:
as an alternative implementation manner, in the embodiment of the present application, the second detection unit 303 is further configured to detect whether the energy storage battery is changed from the powered state to the unpowered state after the third output unit 309 outputs the boosted battery voltage to the frequency converter.
As an alternative implementation manner, in the embodiment of the present application, the state detection of the energy storage battery may be determined both before and during charging. The principle of the application for detecting the charge and discharge is that the battery is not charged when full electricity is provided and the battery is not discharged when empty. If the battery is judged after full charge, the battery is damaged (overcharged). The overdischarge is the same.
As an alternative implementation manner, in the embodiment of the present application, during the boosting (battery discharging) process, the present application can also detect the battery power, and the boosting (not discharging) is not performed when the battery is not powered, so as to prevent overdischarge. Charging is the same.
The second control unit 310 is configured to control the bidirectional dc power supply to stop operating when the second detection unit 303 detects that the energy storage battery is changed from the powered state to the unpowered state.
As an alternative implementation manner, in the embodiment of the present application, if the battery power is exhausted during the boosting process, the second control unit 310 may control the bidirectional dc power supply to stop the boosting operation, so as to prevent the battery from being over-discharged, and at this time, the potential energy lifted by the crane may be all supplied from the mains supply.
As an alternative implementation, in the embodiment of the present invention, if the battery is not powered before the boosting operation, the second control unit 310 may control the bi-directional dc power supply to stay standby, and directly obtain all the energy sources from the mains supply to supply the crane to lift.
Compared to the control system of fig. 3, the control system of fig. 4 further comprises:
as an alternative implementation manner, in this embodiment of the present invention, the second detecting unit 303 is further configured to detect whether the current energy storage battery is changed from the chargeable state to the non-chargeable state after the first control unit 305 controls the bi-directional dc power supply to output the stepped-down voltage of the bus of the frequency converter to the energy storage battery.
As an alternative implementation manner, in this embodiment of the present invention, the second control unit 310 is further configured to control the bidirectional dc power supply to stop operating when the second detection unit 303 detects that the current energy storage battery is changed from the chargeable state to the uncharged state.
The fourth detecting unit 311 is configured to detect whether the bus voltage of the frequency converter reaches a trigger voltage value of the brake resistor.
And a fourth output unit 312, configured to output the converter bus voltage to the brake resistor when the fourth detection unit 311 detects that the converter bus voltage reaches the brake resistor intervention trigger voltage value.
As an alternative implementation manner, in the embodiment of the present application, when the energy storage battery is full during charging, the second control unit 310 may control the bidirectional dc power supply to stop charging the energy storage battery, and at this time, the bus voltage of the frequency converter that is just pulled down to a certain extent by the bidirectional dc power supply has a rising trend, and at this time, the system may control the brake resistor to automatically intervene to consume energy with heat energy.
As an alternative implementation, in the embodiment of the present application, if the energy storage battery is full before the system starts to charge, the system may directly burn the electric energy generated by the potential energy reduction with heat energy through the brake resistor.
As an alternative implementation manner, in the embodiment of the present application, the voltage relationship in the present application is as follows: the brake resistor intervenes in trigger voltage VHR > charging trigger voltage VHH > converter bus standby voltage VDJ > and voltage VFD > after the converter bus is pulled up > discharging trigger voltage VHL.
As an optional implementation mode, in the embodiment of the application, the electric energy of the power generation working condition can be stored, the electric working condition is released, the energy saving effect is realized, meanwhile, the impact on the power grid at the moment of starting the crane is reduced, the braking resistor does not generate heat (the battery can completely absorb the generated power, the battery is full under the non-extreme working condition and cannot absorb the energy), and the heat dissipation requirement is reduced.
In the embodiment of the application, as an optional implementation manner, the application can provide possibility for the enterprise to increase the capacity of the power supply system under the condition of multiple machine application scenes and without expanding the capacity of the power supply system.
It can be seen that implementing another control system as described in fig. 4 can achieve energy storage type energy saving effects.
In addition, another control system described in fig. 4 is implemented, so that the electric energy in the power generation working condition can be stored and the electric energy in the electric working condition can be released, and the energy-saving effect is realized.
In addition, the implementation of the other control system described in fig. 4 can reduce the impact of the crane on the power grid at the moment of starting and reduce the heat dissipation requirement.
Example five
Referring to fig. 5, fig. 5 is a schematic structural diagram of another control system according to an embodiment of the present application. As shown in fig. 5, the control system may include:
a memory 501 in which executable program codes are stored;
a processor 502 coupled to the memory 501;
the processor 502 invokes executable program codes stored in the memory 501 to execute any one of the energy-storage energy-saving control methods of fig. 1-2.
The embodiment of the application discloses a computer readable storage medium which stores a computer program, wherein the computer program enables a computer to execute any one of energy storage type energy saving control methods shown in fig. 1-2.
The embodiments of the present invention also disclose a computer program product, wherein the computer program product, when run on a computer, causes the computer to perform some or all of the steps of the method as in the method embodiments above.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the above embodiments may be implemented by hardware associated with a program that may be stored in a computer-readable storage medium, including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), or other optical disk Memory, magnetic disk Memory, tape Memory, or any other medium that can be used to carry or store data that is readable by a computer.
The above describes in detail an energy-storage type energy-saving control method and control system disclosed in the embodiments of the present invention, and specific examples are applied to illustrate the principles and embodiments of the present invention, and the above description of the embodiments is only used to help understand the method and core idea of the present invention; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims (9)

1. An energy-storage type energy-saving control method is characterized by comprising the following steps:
detecting whether the bus voltage of the frequency converter is larger than a charging trigger voltage value; if yes, judging that the crane works in a power generation mode;
detecting whether the current energy storage battery is in a chargeable state; if yes, the busbar voltage of the frequency converter is output to a bidirectional direct current power supply;
after the bidirectional direct current power supply carries out step-down treatment on the busbar voltage of the frequency converter, controlling the bidirectional direct current power supply to output the step-down busbar voltage of the frequency converter to an energy storage battery;
and after the bidirectional direct current power supply is controlled to output the reduced busbar voltage of the frequency converter to the energy storage battery, the method further comprises:
Detecting whether the energy storage battery is changed from a chargeable state to a non-chargeable state at present; if yes, controlling the bidirectional direct current power supply to stop working; at this time, the bus voltage of the frequency converter pulled down by the bidirectional direct current power supply has a rising trend;
detecting whether the busbar voltage of the frequency converter reaches a braking resistor intervention trigger voltage value or not; if yes, the busbar voltage of the frequency converter is output to a brake resistor to be consumed in a heat energy mode.
2. The method according to claim 1, wherein the method further comprises:
detecting whether the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value; if yes, detecting whether the output end of the bidirectional direct current power supply has no load characteristic; wherein the charge trigger voltage value is greater than the discharge trigger voltage value;
and if the no-load characteristic of the output end of the bidirectional direct current power supply is detected, judging that the frequency converter is in a closed state, and controlling the bidirectional direct current power supply to stop working.
3. The method according to claim 2, wherein the method further comprises:
if the load equipment is detected to be at the output end of the bidirectional direct current power supply, judging that the crane is in an electric mode currently;
Detecting whether the energy storage battery is in a non-electroless state at present; if yes, outputting the battery voltage in the energy storage battery to the bidirectional direct current power supply;
after the battery voltage is subjected to boosting treatment on the bidirectional direct current power supply, outputting the boosted battery voltage to the frequency converter; the battery voltage after boosting is smaller than the standby voltage value of the bus of the frequency converter.
4. A method according to claim 3, wherein after said outputting the boosted battery voltage into the frequency converter, the method further comprises:
detecting whether the energy storage battery is changed from an electrified state to an unpowered state; if yes, the bidirectional direct current power supply is controlled to stop working.
5. The method according to claim 1, wherein the method further comprises:
the intervention trigger voltage value of the brake resistor is larger than the charging trigger voltage value.
6. A control system, the control system comprising:
the first detection unit is used for detecting whether the bus voltage of the frequency converter is larger than a charging trigger voltage value;
the first determining unit is used for judging that the crane works in a power generation mode when the first detecting unit detects that the bus voltage of the frequency converter is larger than the charging trigger voltage value;
The second detection unit is used for detecting whether the current energy storage battery is in a chargeable state or not;
the first output unit is used for outputting the bus voltage of the frequency converter to a bidirectional direct current power supply when the second detection unit detects that the current energy storage battery is in a chargeable state;
the first control unit is used for controlling the bidirectional direct current power supply to output the stepped down busbar voltage of the frequency converter to the energy storage battery after the bidirectional direct current power supply steps down the busbar voltage of the frequency converter.
7. The control system of claim 6, wherein the control system further comprises:
the first detection unit is further used for detecting whether the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value;
the third detection unit is used for detecting whether the output end of the bidirectional direct current power supply has no load characteristic or not when the first detection unit detects that the busbar voltage of the frequency converter is smaller than a discharge trigger voltage value; wherein the charge trigger voltage value is greater than the discharge trigger voltage value;
and the determining and controlling unit is used for judging that the frequency converter is in a closed state when the third detecting unit detects the no-load characteristic of the output end of the bidirectional direct current power supply, and controlling the bidirectional direct current power supply to stop working.
8. The control system of claim 7, wherein the control system further comprises:
the first determining unit is further configured to determine that the crane is currently in an electric mode when the third detecting unit detects that the output end of the bidirectional direct current power supply has load equipment;
the second detection unit is further used for judging whether the energy storage battery is in a non-electroless state at present;
the second output unit is used for outputting the battery voltage in the energy storage battery to the bidirectional direct current power supply when the second detection unit detects that the energy storage battery is in a non-electroless state currently;
the third output unit is used for outputting the boosted battery voltage to the frequency converter after boosting the battery voltage on the bidirectional direct current power supply; the battery voltage after boosting is smaller than the standby voltage value of the bus of the frequency converter.
9. A control system, the control system comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform the energy storage energy conservation control method of any one of claims 1-5.
CN202310372346.3A 2023-04-10 2023-04-10 Energy storage type energy saving control method and control system Active CN116081487B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110912109A (en) * 2018-09-14 2020-03-24 江苏德力化纤有限公司 Low-voltage direct-current power supply and distribution equipment and method
CN215009723U (en) * 2020-11-23 2021-12-03 中联重科股份有限公司 Energy recovery system sharing direct current bus and electric automobile crane
CN114597940A (en) * 2022-03-09 2022-06-07 上海海得控制系统股份有限公司 Lithium battery potential energy feedback system of crane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110912109A (en) * 2018-09-14 2020-03-24 江苏德力化纤有限公司 Low-voltage direct-current power supply and distribution equipment and method
CN215009723U (en) * 2020-11-23 2021-12-03 中联重科股份有限公司 Energy recovery system sharing direct current bus and electric automobile crane
CN114597940A (en) * 2022-03-09 2022-06-07 上海海得控制系统股份有限公司 Lithium battery potential energy feedback system of crane

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