CN117559623A - Energy storage type emergency power supply and drive control method and device for mine induction motor hoister - Google Patents

Energy storage type emergency power supply and drive control method and device for mine induction motor hoister Download PDF

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Publication number
CN117559623A
CN117559623A CN202311398008.3A CN202311398008A CN117559623A CN 117559623 A CN117559623 A CN 117559623A CN 202311398008 A CN202311398008 A CN 202311398008A CN 117559623 A CN117559623 A CN 117559623A
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China
Prior art keywords
power supply
elevator
battery
mode
temperature
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CN202311398008.3A
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Chinese (zh)
Inventor
杨波
谭国俊
刘海宁
凌臧
张玉成
潘雷
张四元
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Jiangsu Guochuan Electric Co ltd
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Jiangsu Guochuan Electric Co ltd
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Priority to CN202311398008.3A priority Critical patent/CN117559623A/en
Publication of CN117559623A publication Critical patent/CN117559623A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/004—Staff transport system
    • 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
    • H02J7/00309—Overheat or overtemperature 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • H02P21/0021—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control using different modes of control depending on a parameter, e.g. the speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/05—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using AC supply for both the rotor and the stator circuits, the frequency of supply to at least one circuit being variable
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/60—Controlling or determining the temperature of the motor or of the drive
    • H02P29/68—Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20945—Thermal management, e.g. inverter temperature 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
    • 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)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Elevator Control (AREA)

Abstract

The invention provides a method and a device for controlling energy storage type emergency power supply and driving of a mine induction motor hoist, wherein the method comprises the following steps: collecting working states of the mains supply loop 1 and the mains supply loop 2 in real time; judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2; switching the elevator from mains supply to emergency supply by putting the elevator into an emergency supply mode; starting an auxiliary unit of the elevator and an electric control unit of the elevator, and judging whether the elevator has operation conditions or not; receiving an operation instruction of the elevator, and controlling the operation of the elevator according to the operation instruction; and (3) exiting the emergency working mode, and switching the elevator from emergency power supply to mains supply. The invention adopts a new energy storage and conversion combined mode to replace the original diesel engine power generation system, solves the problem of emergency power supply of the mine induction motor elevator control system, can rapidly establish an emergency rescue lifting channel, and provides safety guarantee for mine personnel and production.

Description

Energy storage type emergency power supply and drive control method and device for mine induction motor hoister
Technical Field
The invention relates to the field of electromechanical equipment transmission control, in particular to an energy storage type emergency power supply and driving control method and device for a mine induction motor elevator.
Background
The mine hoist is one of key equipment of mines, bears the task of lifting and lowering personnel and materials, and is a throat part of the mine. In particular, a secondary well elevator for transporting personnel, and once an abnormality occurs underground, the personnel are transported to the ground from underground at the first time. However, when the mine power supply system is damaged, the mine hoist cannot work, underground personnel face danger because of being unable to go to the well, and subsequent rescue work is very difficult. Therefore, the mine power supply system plays an extremely critical and important role in the safety production of the coal mine. According to the design specification requirements of a coal mine power supply system, high-capacity loads such as a double power supply are required to be powered, but the strict requirements of mine safety production on power supply reliability can not be met. When special conditions occur, such as natural disasters of earthquake, water trouble and the like, the dual-power supply loop fails, and the reliability of mine power supply safety still cannot be guaranteed.
In order to solve the problem of mine power supply safety, the current general method is to use a diesel engine as a third path of emergency power supply of the mine. However, diesel engines have the following disadvantages as a backup power supply: the mutual matching degree of the power supply system and the motor drive system of the elevator is poor, and the large fluctuation of the network voltage of the power supply part is often caused by acceleration and deceleration of the elevator, so that the speed regulation performance of the elevator is further deteriorated; the reverse power flow has serious influence, and the feedback braking energy is consumed through a resistor when the elevator is lowered, so that the motor braking failure and other problems are often caused; the large amount of oil reserves cause potential safety hazard, and the pollution such as noise, vibration and smoke discharge is great. Long starting time, low running efficiency and guaranteeing the reliability. The control method and the device for the emergency elevator, which are proposed in the prior art, can not cancel the power supply device of the diesel engine because the power supply problem of the low-voltage control part of the control system of the induction motor elevator can not be solved though the battery or the super capacitor is adopted for recycling the feedback energy.
Disclosure of Invention
The invention aims to provide an energy storage type emergency power supply and drive control method and device for a mine induction motor hoist, which solve the power supply problem of a low-voltage control part of a system, realize energy recovery and high-performance speed regulation under emergency power supply and improve the safety of a hoist system.
The invention provides an emergency lifting control method of a mine hoist, which comprises the following steps:
collecting working states of the mains supply loop 1 and the mains supply loop 2 in real time;
judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2;
switching the elevator from mains supply to emergency supply by putting the elevator into an emergency supply mode; the emergency power supply power is provided by a battery;
converting the direct current stored by the battery into three-phase alternating current control electricity;
starting an auxiliary unit and an electric control unit of the elevator, and judging whether the elevator has running conditions or not;
receiving an operation instruction of the elevator, and controlling the operation of the elevator according to the operation instruction;
judging whether to exit the emergency power supply mode according to the normal working state of the mains supply loops 1 and 2;
and (3) exiting the emergency working mode, and switching the elevator from emergency power supply to mains supply.
In some embodiments, the converting the battery-stored direct current to three-phase alternating current control electricity comprises:
detecting whether the working state of the battery is normal; the battery operating state includes: battery voltage, power, and temperature;
generating a starting power supply by using the electric energy stored by the battery to enter a power supply conversion link;
the power conversion link selects a conversion mode for converting direct current stored by the battery into three-phase alternating current according to whether the direct current side voltage is larger than the effective value of the emergency power line voltage or whether a three-phase power supply is needed;
and converting the direct-current electric energy into three-phase alternating-current electric energy according to the selected conversion mode.
In some embodiments, the converting dc power to three-phase ac power according to the selected conversion scheme includes:
when the voltage of the direct current side is larger than the effective value of the voltage of the emergency power lineWhen the power is multiplied, a conversion mode of directly converting direct-current electric energy into three-phase alternating-current control electricity is selected;
when the voltage of the direct current side is smaller than the effective value of the voltage of the emergency power lineWhen the voltage is multiplied, the output direct-current voltage is boosted to a first direct-current voltage set value, and then the direct-current electric energy is converted into an alternating-current control electric energy conversion mode;
when a three-phase power supply is needed, a conversion mode of converting direct-current electric energy into alternating-current electric energy and then boosting output voltage to a second direct-current voltage set value is selected; the second direct-current voltage set value is the effective value of the line voltage of the power supply of the elevator Doubling; the second direct-current voltage set value is larger than or equal to the first direct-current voltage set value;
the conversion of direct current electric energy into three-phase alternating current electric energy comprises three stages:
the first stage, controlling the frequency of the output alternating voltage to be a set frequency;
the second stage, the amplitude of the alternating voltage is increased to a set value of the amplitude of the alternating voltage according to a slope;
the third stage, the outer loop closed-loop control of the amplitude and frequency of the power supply voltage is carried out, and the outer loop closed-loop control outputs the given value of the active current and the reactive current; sampling to obtain active current and reactive current feedback values, and then performing inner loop closed-loop control on the active current and the reactive current, and finally outputting the emergency power supply with stable amplitude and frequency.
In some embodiments, the receiving the operation instruction of the elevator, before controlling the operation of the elevator according to the operation instruction, further includes:
and (5) according to the charge state and the load quality of the battery, predicting whether the current lifting or lowering is allowed.
In some embodiments, the predicting whether the current lifting or lowering is allowed includes:
the zero-speed running of the motor is controlled, and the load of the hoisting machine is calculated, so that the energy consumed by the load is lifted or the energy fed back by the load is lowered;
judging whether the residual available electric quantity of the battery can meet the current lifting or lowering according to the energy consumed by lifting or lowering the effective load or the feedback state of charge of the battery;
If the battery can meet the current lifting or lowering, calculating the maximum allowable running speed of the elevator, controlling the actual running speed of the elevator to be less than or equal to the maximum running speed, and continuing the lifting or lowering process;
if the battery can not meet the lifting or lowering requirement, a parking or emergency parking command is sent; when a parking command is received, controlling the elevator to decelerate and park; and when an emergency stop command is received, controlling the elevator to stop by the brake immediately.
In some embodiments, when the mine induction motor adopts a doubly-fed motor, the stator side needs to be in short circuit connection when the elevator is switched from mains supply to emergency supply; when receiving the operation instruction of the elevator, the vector control mode of the doubly-fed motor is changed firstly, and then the operation of the elevator is controlled according to the operation instruction;
the changing the vector control mode of the double-fed motor comprises the following steps:
when the elevator works in a non-emergency mode, the stator of the doubly-fed motor is powered by mains supply, the rotor is powered by the frequency converter, and at the moment, the motor control strategy adopts vector control based on stator flux linkage orientation;
when the elevator works in an emergency mode, the stator is short-circuited, the rotor side is powered by the frequency converter, and the motor control strategy adopts vector control based on rotor flux linkage orientation.
In some embodiments, the mine induction motor hoist energy storage type emergency power supply and drive control method further comprises: the battery is charged and managed in a non-emergency working state in a mains supply state; the battery charge management in the non-emergency working state under the mains supply state comprises:
detecting whether the elevator system is powered by mains supply;
judging whether the battery needs to be charged or not; the judging method is that when the charge quantity indicated by the charge state of the battery is lower than the first charge quantity, the battery is started to be charged; a margin is reserved between the first charging charge and the full charging charge of the battery; the first charging charge is set to be the full battery capacity minus the potential energy of the single-drop lifting container; the potential energy of the single-lowering lifting container is as follows:
Ep＝mgh
where Ep is gravitational potential energy, m is the mass of the lifting container, g is the gravitational acceleration of the earth's surface, and h is the well depth;
selecting a charging mode according to whether a charging and discharging device exists between the power supply device and the battery device; if no charge-discharge device exists between the power supply device and the battery device, controlling the power supply device to work in a rectification mode, charging the battery device, and stopping charging the battery when the charge quantity of the charge state indication charge of the battery is larger than or equal to the first charge quantity;
If a charging and discharging device is arranged between the power supply device and the battery device, controlling the power supply device to work in a rectification mode and controlling the charging and discharging device to work in a voltage reduction mode to charge the battery;
stopping charging the battery when the charge quantity of the charge state indication charge of the battery is greater than or equal to the first charge;
the working process for controlling the charge-discharge device to work in the step-down mode to charge the battery comprises the following steps: the first stage, charging current is controlled to charge according to a constant current mode; and in the second stage, the charging voltage is controlled to charge the battery in a constant voltage charging mode.
In some embodiments, the method further comprises performing a model-based predictive heat dissipation adjustment for a power electronic device including a power conversion portion of an excitation loop and an armature loop of an electric machine, and power electronics for use in an emergency power supply apparatus, the heat dissipation adjustment process comprising:
collecting the temperature of power electronic equipment, and performing pressure-frequency conversion on the temperature value to obtain a frequency signal;
receiving a frequency signal of the temperature of the power electronic equipment, obtaining a temperature value of the power electronic equipment by decoding the frequency signal, and carrying out communication coding on the temperature value;
fitting the digital temperature value to obtain a real-time heat dissipation model of the power electronic equipment;
Predicting the temperature of the power electronic device at the next moment according to a real-time heat dissipation model of the power electronic device;
and controlling the change of the rotating speed of the executing mechanism of the heat dissipation device according to the predicted temperature and the heat dissipation mode of the power electronic device.
In some embodiments, the real-time heat dissipation model of the power supply device is:
wherein T represents a temperature matrix of the power supply device; x represents a two-dimensional variable matrix, X= [ I t ]] T Wherein I represents a three-phase current effective value, and t represents the running time of the system;estimating a regression coefficient;
the predicted power electronics device temperature at the next time is:
setting a two-dimensional variable matrix x= [ I (k) t+nΔt] T Calculating a predicted temperature value of the power supply device under the condition of a two-bit variable matrix;
wherein I (k) is an effective value of three-phase given current at the current calculation time by adopting a digital signal processing chip, delta T is set as heat conduction time transmitted to a temperature acquisition point by a power electronic device, and n is a prediction step length;
the heat dissipation mode includes: a high performance heat dissipation mode and a low power dissipation mode; the high-performance heat dissipation mode is to fix expected operation temperature, compare the predicted temperature with the set temperature in real time to obtain an operation rotating speed instruction of the execution mechanism of the heat dissipation device, and further control the execution mechanism of the heat dissipation device to operate according to the instruction rotating speed; the low-power dissipation mode refers to that the expected operation temperature is not fixed, and the expected operation temperature T linearly related to the expected operation temperature curve is obtained through the expected operation temperature curve ref According to the expected operating temperature T ref Obtaining an operation rotating speed instruction of the execution mechanism of the heat radiation device, and further controlling the execution mechanism of the heat radiation device to operate according to the instruction rotating speed;
the desired operating temperature profile is obtained by comparing the profile with the profileExpected operating temperature T of relevance ref Comprising:
when the temperature of the power electronic equipment is lower than the ambient temperature T 0 First desired operating temperature T ref1 Is ambient temperature;
when the temperature of the power electronic equipment is at the first operating temperature T 1 And a second operating temperature T 2 When the temperature is in between, the expected temperature of the power electronic equipment is set to be the second expected operating temperature T ref2 ；
When the temperature of the power electronic equipment is at the second operating temperature T 2 And a third operating temperature T 3 When the temperature is in the middle, the expected temperature of the power electronic equipment is set to be the third expected operating temperature T ref3 ；
When the temperature of the power electronic equipment is greater than the third operating temperature T 3 Forcing the execution mechanism of the heat radiation equipment to work at the maximum speed and send out an alarm signal;
when the operating temperature T is desired ref The desired operating temperature T when crossing between the desired operating temperatures ref Adopting a primary slope function to carry out transition;
the rotational speed command is obtained by the following formula:
ifn ref ＜0,n ref ＝0
wherein n is ref For a desired operating speed of the actuator of the power supply device, n set The method comprises the steps of presetting the speed of an executing mechanism of a power supply device; t is the predicted power supply device temperature, T ref For a set desired operating temperature of the power supply device, T max T for maximum allowable operating temperature of the power supply device min N, the operating temperature of the minimum power supply device is allowed N The rated rotation speed of the power supply device actuating mechanism is set; defining n ref >0。
The invention also provides an energy storage type emergency power supply and drive control device of the mine induction motor hoister, which comprises the following components:
the acquisition module is used for acquiring the working states of the circuit 1 and the circuit 2 of the mains supply in real time;
the first judging module is used for judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2;
the power supply starting module is used for converting direct current stored in the battery into three-phase alternating current control electricity;
the auxiliary and electric control starting module is used for starting the auxiliary unit and the electric control unit of the elevator and judging whether the elevator has running conditions or not;
the elevator operation and vector control module is used for receiving elevator operation instructions and controlling the operation of the elevator according to the operation instructions
The second judging module is used for judging whether the emergency power supply mode is exited or not;
and the switching module is connected with the first judging module and the second judging module and is used for switching the power supply mode of the elevator according to the judging results of the first judging module and the second judging module.
The invention has the beneficial effects that:
1. the invention realizes the emergency power supply and emergency driving of the mine induction motor elevator, solves the problem of elevator system power supply by adopting a battery energy storage mode, can completely replace the existing scheme of adopting a diesel engine as emergency power supply, and solves the problems of poor mutual matching degree of a power supply system and an elevator motor driving system in the diesel engine power supply scheme and large network voltage fluctuation. By adopting the improved motor driving scheme, under the energy storage type power supply scheme, the speed regulation scheme and the elevator emergency control method are improved, and the problems that the speed regulation performance of a motor is poor, the influence of reverse power flow is serious and electric energy cannot be fed back when an elevator is lowered under the existing diesel engine power supply system are solved. Meanwhile, the energy storage type power supply is adopted as an emergency power supply for the elevator, so that potential safety hazards caused by a large amount of oil stock are avoided, and low noise, low vibration and low pollution of emergency driving of the elevator are realized. Compared with the diesel engine power supply scheme, the invention has the advantages of short starting time, high running efficiency and high reliability.
2. According to the invention, by changing the stator connection mode and the vector control mode of the doubly-fed motor, the stator power supply problem of the doubly-fed motor in an emergency power supply mode is solved, and the high-performance vector control of the doubly-fed motor in the emergency power supply mode is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a flow chart of a method for controlling energy-storage emergency power supply and driving of a mine induction motor hoist according to an embodiment of the present invention;
FIG. 2 is a flow chart of controlling elevator operation according to battery state of charge and load quality according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a battery charging management process in a non-emergency operation state according to an embodiment of the present invention;
FIG. 4 is a block diagram of a doubly-fed motor change vector control according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a device for controlling energy-storage emergency power supply and driving of a mine induction motor hoist according to an embodiment of the present invention;
fig. 6 is a block diagram of a stator reversing device according to an embodiment of the present invention;
FIG. 7 is a block diagram of a power supply device according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a charge/discharge device according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a structure for controlling operation of a hoist according to battery state of charge and load quality according to an embodiment of the present invention;
Fig. 10 is a schematic diagram of an inverter circuit according to an embodiment of the present invention.
Detailed Description
In order to enhance the understanding and appreciation for the invention, a technical scheme of the invention will be further described with reference to the drawings and the detailed description.
The invention is further described below with reference to the accompanying drawings.
Fig. 1 provides an energy storage type emergency power supply and drive control method for a mine induction motor elevator, which comprises the following steps:
step S100: and collecting working states of the circuit 1 and the circuit 2 of the mains supply in real time.
Step S200: and judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2.
Further, the working states of the circuit 1 and the circuit 2 comprise the voltages of the circuit 1 and the circuit 2, and when the voltage drop slightly exceeds 75% of rated voltage, the circuit abnormality is judged. When the two mains operation states are abnormal, the mains supply mode is cut off and the emergency power supply mode is put into.
Step S300: and switching the elevator from the mains supply to the emergency supply by putting into the emergency supply mode. The emergency power supply is provided by a battery.
And switching the control electricity and the power electricity of the induction motor elevator power supply system from the mains supply loop to the emergency power supply loop.
Step S400: converting the direct current stored by the battery into three-phase alternating current control electricity;
in an embodiment of the present application, converting direct current stored by a battery into three-phase alternating current control electricity includes:
step S410: detecting whether the working state of the battery is normal; the battery operating state includes: battery voltage, power, and temperature;
specifically, the detection of the working state of the battery can be realized by enabling a battery device, and the enabling of the battery device comprises enabling the battery to output direct-current electric energy, protection control, battery equalization and information transmission.
Step S420: generating a starting power supply by using the electric energy stored by the battery to enter a power supply conversion link;
the power conversion link selects a conversion mode for converting direct current stored by the battery into three-phase alternating current according to whether the direct current side voltage is larger than the effective value of the emergency power line voltage or whether a three-phase power supply is needed;
step S430: and converting the direct-current electric energy into three-phase alternating-current electric energy according to the selected conversion mode.
Further, converting the direct current electrical energy into three-phase alternating current electrical energy according to the selected conversion scheme, comprising:
mode one: when the voltage of the direct current side is larger than the effective value of the voltage of the emergency power lineWhen the power is multiplied, a conversion mode of directly converting direct-current electric energy into three-phase alternating-current control electricity is selected.
Specifically, a direct-current voltage, an alternating-current voltage and an alternating-current voltage are collected, and direct-current electric energy is converted into alternating-current electric energy through a power supply device. The dc voltage is a voltage supplied from the battery device to the power supply device. The ac voltage and current are the voltage and current of the three-phase ac control power source that the power supply apparatus desires to output.
In this embodiment, the method can directly convert the direct current electric energy stored in the battery into three-phase alternating current control electricity, and the conversion mode is suitable for a place where the control power supply is 380V three-phase alternating current power supply and the voltage of the power supply device is higher than 540V. This embodiment requires a relatively high battery voltage.
In some cases, in order to reduce the output voltage of the battery pack, a charging and discharging circuit is added to the output end of the battery pack to realize flexible configuration of the battery pack voltage, as follows.
Mode two: when the DC side voltage is smaller than the voltage amplitude of the control power lineWhen the voltage is multiplied, the output direct-current voltage is boosted to a first direct-current voltage set value, and then the direct-current electric energy is converted into an alternating-current control electric energy conversion mode.
In this embodiment, the charging and discharging device may be operated in a boost mode to control the charging and discharging device to output the dc voltage to the first dc voltage set value. The charge-discharge device may employ a current reversible chopper topology. The first direct-current voltage set value is the effective value of the line voltage of the elevator control power supply Multiple times.
In this embodiment, the elevator control power supply is a 380V three-phase ac power supply, the dc side input voltage of the power supply device needs to be higher than 540V, and the dc voltage range of the battery pack is only 200-300V. Therefore, the battery pack voltage is increased to 540V through the charging and discharging device, and the power supply can output a three-phase 380V alternating current power supply. In addition, in the boosting process, the charge state of the energy storage link is considered in the process of boosting, so that the safety of the energy storage link is ensured.
The second mode is different from the first mode in that the dc voltage is a voltage that is supplied to the power supply device after the battery device is boosted. The ac voltage and current are the voltage and current flow of the three-phase ac control power source that the power supply device desires to output.
The second mode can convert the direct current electric energy with lower voltage stored in the battery into three-phase alternating current control electric energy. But the energy storage type emergency power supply of the elevator not only needs a three-phase control power supply but also needs a three-phase power supply, and the effective value of the output voltage of the general power supply is more than twice that of the alternating voltage of the three-phase control power supply. However, the high-voltage battery pack provides a power source, but the high-voltage battery pack increases the difficulty in designing the power supply device. Therefore, in order to meet the requirement of the power electricity on the high dc voltage and the requirement of the control electricity on the lower dc voltage, the following conversion method is proposed.
Mode three: when a three-phase power supply is needed, a conversion mode of converting direct-current electric energy into alternating-current electric energy and then boosting output voltage to a second direct-current voltage set value is selected; the second DC voltage set value is the effective value of the line voltage of the power supply of the elevatorMultiple times.
The second mode is different from the third mode in that the dc voltage is a voltage supplied from the battery device to the power supply device, that is, the dc side of the power supply device is directly connected to the battery device without passing through the charge/discharge device. The ac voltage and current are the voltage and current of the three-phase ac control power source that the power supply apparatus desires to output. The second DC voltage set value is the effective value of the line voltage of the power supply of the elevatorMultiple times. Typically, the second dc voltage set point is greater than the first dc voltage set point.
In this embodiment, the elevator control power supply is a 380V three-phase ac power supply, the power supply device is connected to the dc side of the battery device, and the voltage of the battery device is slightly higher than 540V. The line voltage is 660V due to the output power. The battery voltage can be raised to a second DC voltage set point (933V) by a charge-discharge device, the second DC voltage set point is passed throughThe power supply can meet the requirement of power electricity on direct-current voltage through calculation. The embodiment not only meets the requirement of power electricity on high direct-current voltage, but also meets the requirement of control electricity on lower direct-current voltage. The design difficulty of the power supply device is reduced.
In the embodiment of the application, the conversion of the direct-current electric energy into the three-phase alternating-current electric energy comprises three stages:
the first stage, controlling the frequency of the output alternating voltage to be a set frequency;
the second stage, the amplitude of the alternating voltage is controlled to rise to the set value of the amplitude of the alternating voltage according to a slope;
the third stage, the outer loop closed-loop control of the amplitude and frequency of the power supply voltage is carried out, and the outer loop closed-loop control outputs the given value of the active current and the reactive current; sampling to obtain active current and reactive current feedback values, and then performing inner loop closed-loop control on the active current and the reactive current, and finally outputting the emergency power supply with stable amplitude and frequency.
Step 500: and starting the auxiliary unit and the electric control unit of the elevator, and judging whether the elevator has running conditions or not.
Specifically, the auxiliary units of the elevator and the electric control unit are started in sequence. And monitoring the working state of the safety loop of the elevator, and when the feedback of the safety loop of the elevator is normal, providing the elevator with the operating condition. The safety loop of the elevator is connected with state feedback needed by the operation of the elevator in series. The auxiliary unit for starting the elevator comprises a shaft starting switch, a signal starting system, a lubrication station, a hydraulic station and a working valve, wherein the hydraulic station is in a standby state, and a motor fan is started. The starting elevator electric control unit comprises a starting elevator travel and protection control system, and the embodiment adopts a PLC as the elevator travel and protection control system.
Step S600: and receiving an operation instruction of the elevator, and controlling the operation of the elevator according to the operation instruction.
In particular, the run instructions include, but are not limited to, up, down, start, stop, and speed instructions. Controlling a hydraulic station and a disc-shaped gate pressurizing open gate by controlling an elevator operation package according to an operation instruction; controlling the acceleration and deceleration operation of the elevator; receiving a parking command of the elevator, and controlling the elevator to decelerate and park; and receiving a fault stopping command of the elevator, and controlling the elevator to stop by contracting the brake immediately.
Controlling operation of the elevator according to the operation command includes controlling the motor to operate according to the speed command. However, the method does not consider the residual battery power, and when the elevator runs for a plurality of times, the battery power is reduced, and the residual battery power may cause that the current lifting cannot be completed. In another case, if the remaining battery power is too high, the current lowering of the weight cannot be completed. In order to solve the problem, the safety of the elevator in an emergency state is improved, and the hoisting process needs to be prejudged and controlled. According to the invention, whether the emergency power supply and driving device meets the current lifting or lowering requirement is predicted according to the state of charge and the load quality of the battery. Meanwhile, the maximum operation speed of the elevator is planned according to the charge state and the load quality of the battery, the operation time of lifting or lowering the hoisting container is shortened, and the working efficiency of the elevator in an emergency state is improved.
In an alternative embodiment, before controlling the operation of the elevator according to the operation command, the method further comprises:
and S600, pre-judging whether the lifting or the lowering is allowed according to the charge state and the load quality of the battery.
Referring to fig. 2, according to the state of charge and the load quality of the battery, whether to allow the current lifting or lowering is pre-determined, and the specific steps include:
step S610: and controlling the motor to run at zero speed, calculating the load of the elevator, and lifting the load to consume energy or lowering the energy fed back by the load.
Specifically, the energy consumed or fed back by the payload m is lifted or lowered:
according to the characteristics of emergency lifting working conditions, the operation speed is low, and the above formula is approximately equivalent to:
η j for speed reducer efficiency, eta d For motor efficiency, H is lift height, T is lift or drop run time, m is load mass, and V is motor run speed.
Step S611: and judging whether the residual available electric quantity of the battery can meet the current lifting or lowering according to the energy consumed by lifting or lowering the effective load or the feedback state of charge of the battery.
Specifically, according to the energy consumed or fed back by lifting or lowering the payload m and the battery charge state, in the first aspect, when the elevator is in the lifting working condition, whether the remaining available electric quantity of the battery can meet the lifting or lowering requirement is judged, so that the situation that the lifting container cannot smoothly reach the designated position due to insufficient electric quantity of the battery is prevented. When the elevator is in the descending working condition, whether the residual storable electric quantity space of the battery can recover the energy fed back to the battery after the descending is judged, so that interference of the electric quantity of the battery is prevented, and the energy cannot be fed back when the elevator is braked in a decelerating mode.
Step S612: if the battery can meet the current lifting or lowering, calculating the maximum allowable running speed of the elevator, controlling the actual running speed of the elevator to be less than or equal to the maximum running speed, and continuing the lifting or lowering process.
Specifically, the maximum allowable running speed Vm of the elevator is calculated according to the voltage of the direct current bus:
vm= ((dc bus voltage/1.414)/U N )*V N 。*K 0
U N For rated line voltage of motor, V N The rated running speed of the elevator is set for the motor at the rated rotating speed.
K 0 In order to consider the voltage margin of battery voltage floating and motor dynamic overshoot, the embodiment takes K 0 ＝90％。
Controlling the actual operating speed of the hoist to be less than or equal to the maximum operating speed includes forcing the speed command to the maximum operating speed Vm of the hoist when the received hoist speed command is greater than the maximum operating speed Vm of the hoist. And sending a reminding window to the upper computer to remind an operator of further increasing the running speed of the elevator when the received speed command is smaller than the maximum running speed Vm of the elevator.
Step S613: if the battery can not meet the lifting or lowering requirement, a parking or emergency parking command is sent; when a parking command is received, controlling the elevator to decelerate and park; and when an emergency stop command is received, controlling the elevator to stop by the brake immediately.
According to the flow for controlling the operation of the elevator according to the battery state of charge and the load quality, the emergency lifting capacity is pre-judged by comparing the battery state of charge and the load as the function quantity, and the elevator is prevented from being stopped midway due to the fact that the electric quantity of a battery device is reduced. The control flow strengthens the safety of emergency lifting transportation. And the operation efficiency of the elevator under the power supply working condition of the emergency power supply is improved by calculating the maximum operation speed. Further, the operation of the elevator is limited within the maximum allowable speed, and the operation safety of the elevator can be improved.
Step S700: and judging whether to exit the emergency power supply mode according to the normal working state of the mains supply loops 1 and 2.
Specifically, when the working state of the mains supply loop is normal, the step S800 is shifted to; otherwise, the process proceeds to step S600, where the emergency lifting operation is continued.
Step S800: and (3) exiting the emergency working mode, and switching the elevator from emergency power supply to mains supply.
Specifically, the control electricity and the power electricity of the induction motor elevator power supply system are switched from an emergency power supply loop to a mains supply loop.
In the above-described embodiments, the charge management of the battery device is not involved. In order to ensure that the battery device has enough energy in an emergency state, a further embodiment of the present invention provides a battery charging management procedure in a non-emergency working state.
In an alternative embodiment, the energy storage type emergency power supply and drive control method of the mine induction motor hoist further comprises the following steps:
step S900: and carrying out charging management on the battery in a non-emergency working state in a mains supply state.
In this embodiment of the present application, the battery in the non-emergency working state is charged and managed in the mains supply state, and referring to fig. 3, specific steps include:
step S910: and detecting whether the elevator system is powered by the mains supply.
Detecting whether the elevator system is powered by the mains supply comprises judging whether a mains supply loop is normal according to the mains supply working state; also included is that the hoisting machine is not in emergency mode of operation.
Step S920: it is determined whether the battery needs to be charged.
And when the charge state of the battery indicates that the charge amount is lower than the first charging charge, starting charging of the battery.
In order to achieve deceleration and feedback braking of the motor during heavy load lowering, the battery device must reserve enough capacity space to absorb the electric energy of the feedback braking.
Further, the first charge is set to the full battery minus the potential energy of the single drop lift container. The potential energy of a single lowering lifting container is ep= mgh, where Ep is the gravitational potential energy, m is the mass of the lifting container, g is the earth's surface gravitational acceleration, and h is the well depth.
Step S930: the charging mode is selected according to whether a charging and discharging device exists between the power supply device and the battery device.
If no charge-discharge device is arranged between the power supply device and the battery device, the power supply device is controlled to work in a rectification mode to charge the battery device, and when the charge quantity of the charge state indication charge of the battery is larger than or equal to the first charge quantity, the charging of the battery is stopped.
Controlling the power supply device to operate in the rectification mode includes: the method comprises the steps of collecting three-phase alternating current voltage, current and direct current output voltage of a power supply device, and controlling the power supply device to convert the alternating current voltage into set direct current bus voltage.
Charging the battery device includes: and acquiring the voltage, the current and the state of charge of the battery device, and charging the battery device by controlling the charging current and the charging voltage.
If a charging and discharging device is arranged between the power supply device and the battery device, the power supply device is controlled to work in a rectifying mode, and the charging and discharging device is controlled to work in a voltage reducing mode to charge the battery.
The working process for collecting the voltage and the charging current of the charging and discharging battery and controlling the charging and discharging device to work in a step-down mode to charge the battery comprises the following steps: in the first stage, the charging current is controlled to charge according to a constant current mode, and in the second stage, the charging voltage is controlled to charge the battery according to a constant voltage mode.
In the process of depressurization, the state of charge of the energy storage link is considered in real time so as to ensure the safety of the energy storage link.
Step S940: and stopping charging the battery when the charge quantity of the charge state indication charge of the battery is greater than or equal to the first charge.
The control flow for charging the battery in the non-emergency working state solves the charging problem of the energy storage link in the emergency power supply device, reduces the maintenance workload of the battery link and improves the reliability of emergency power supply.
The implementation of the method in the above embodiment aims at that the elevator is an induction motor, and when the mine synchronous motor adopts a doubly-fed motor, step S300 is to switch the elevator from mains supply to emergency supply, and the stator side needs to be connected in a short circuit; step S600 is to change the vector control mode of the doubly-fed motor when receiving the operation instruction of the elevator, and then to control the operation of the elevator according to the operation instruction; and S800, exiting the emergency working mode, switching the elevator from emergency power supply to mains supply, relieving the short circuit connection of the stator and changing the vector control mode of the doubly-fed motor. The doubly-fed motor is powered by a stator and a rotor, and typically the stator side is powered by high voltage, typically 6 kv or 10 kv.
Further, changing the doubly-fed motor vector control scheme includes:
when the elevator works in a non-emergency mode, the stator of the doubly-fed motor is powered by mains supply, the rotor is powered by the frequency converter, and at the moment, the motor control strategy adopts vector control based on stator flux linkage orientation;
when the elevator works in an emergency mode, the stator is short-circuited, the rotor side is powered by the frequency converter, and the motor control strategy adopts vector control based on rotor flux linkage orientation.
For ease of illustration, referring to FIG. 4, a vector control block diagram for a doubly-fed motor city power mode and an emergency mode of operation is provided in FIG. 4. The method adopts a control mode of double closed loops of rotating speed and flux linkage, and the core part of the control strategy is a flux linkage observer. The following describes the calculation modes of the two flux linkage observers in this embodiment.
The stator flux linkage calculation process in this embodiment is as follows:
1. stator flux linkage observation through voltage model
2. Stator flux orientation angle obtained by stator flux
The rotor flux linkage calculation process of the embodiment is as follows:
1. low-speed region is used for observing stator flux linkage through current model
2. High-speed region is used for observing stator flux linkage through voltage model
3. Forming a current model and a voltage model into a mixed model output by a compensator
The compensator is of the formula,
4. calculating rotor flux linkage by stator flux linkage
5. Obtaining rotor flux orientation angle through rotor flux
The embodiment changes the vector control mode of the double-fed motor, and changes the power supply of the double-fed motor stator from a high-voltage power supply to a induced potential power supply by short-circuiting the double-fed motor stator, thereby solving the problem that the stator high-voltage power supply cannot be provided for the double-fed motor in an emergency power supply mode. In order to realize high-performance control after stator short circuit, the stator flux linkage directional vector control of the doubly-fed motor in a normal working mode is changed into rotor flux linkage directional vector control in an emergency working mode, and the high-performance driving characteristic of vector control is continuously maintained by changing a flux linkage observation mode.
In an alternative embodiment, the energy storage type emergency power supply and drive control method of the mine induction motor hoist further comprises the following steps: performing model-based heat dissipation adjustment for a power electronic device including an electric energy conversion portion of an excitation circuit and an armature circuit of a motor, and a power electronic device used in an emergency power supply apparatus, the heat dissipation adjustment process including:
collecting the temperature of power electronic equipment, and performing pressure-frequency conversion on the temperature value to obtain a frequency signal;
Receiving a frequency signal of the temperature of the power electronic equipment, obtaining a temperature value of the power electronic equipment by decoding the frequency signal, and carrying out communication coding on the temperature value;
fitting the digital temperature value to obtain a real-time heat dissipation model of the power electronic equipment;
predicting the temperature of the power electronic device at the next moment according to a real-time heat dissipation model of the power electronic device;
and controlling the change of the rotating speed of the executing mechanism of the heat dissipation device according to the predicted temperature and the heat dissipation mode of the power electronic device.
In this embodiment of the application, carry out data fitting with digital temperature value, obtain power electronic equipment's real-time heat dissipation model, include:
establishing a regression equation of a real-time heat dissipation model of the power electronic equipment; the regression equation of the real-time heat dissipation model of the power electronic equipment is:
T＝Xθ
wherein T represents a temperature matrix of the power electronic device; x represents a two-dimensional variable matrix, X= [ I t ]] T Wherein I represents a three-phase current effective value, and t represents the running time of the system; θ represents a regression coefficient matrix;
calculating a real-time heat dissipation model of the power electronic device according to the regression equation; the calculation method comprises the following steps:
P(N)＝P(N-1)-G(N)X T (N)P(N-1)]
wherein,and->For the last regression coefficient estimation value and the present regression coefficient estimation value,
The prediction of the current observation value is that T (N) is the actual temperature value, G (N) is the prediction gain term, and P (N) is the intermediate term.
In one embodiment, the real-time heat dissipation model of the power electronic device is:
wherein,is the regression coefficient estimation value.
Further, the predicted power electronics device temperature at the next time is:
setting a two-dimensional variable matrix x= [ I (k) t+nΔt] T Calculating a predicted temperature value of the power electronic equipment under the condition of the two-bit variable matrix;
wherein I (k) is an effective value of three-phase given current at the current calculation time by adopting a digital signal processing chip, deltaT is set as heat conduction time transmitted to a temperature acquisition point by a power electronic device, and n is a prediction step length.
Preferably, Δt is set to 0.05 seconds and n is set to 10 steps.
Further, the heat dissipation mode includes: a high performance heat dissipation mode and a low power dissipation mode; the high-performance heat dissipation mode refers to a heat dissipation device obtained by fixing the expected operating temperature, and comparing the predicted temperature with the set temperature in real timeThe execution mechanism is provided with an operation rotating speed instruction, so that the execution mechanism of the heat radiation device is controlled to operate according to the instruction rotating speed; the low-power dissipation mode refers to that the expected operation temperature is not fixed, and the expected operation temperature T linearly related to the expected operation temperature curve is obtained through the expected operation temperature curve ref According to the expected operating temperature T ref Obtaining an operation rotating speed instruction of the execution mechanism of the heat radiation device, and further controlling the execution mechanism of the heat radiation device to operate according to the instruction rotating speed;
further, the desired operating temperature T linearly related to the desired operating temperature curve is obtained by the desired operating temperature curve ref Comprising:
when the temperature of the power electronic equipment is lower than the ambient temperature T 0 First desired operating temperature T ref1 Is ambient temperature;
when the temperature of the power electronic equipment is at the first operating temperature T 1 And a second operating temperature T 2 When the temperature is in between, the expected temperature of the power electronic equipment is set to be the second expected operating temperature T ref2 ；
When the temperature of the power electronic equipment is at the second operating temperature T 2 And a third operating temperature T 3 When the temperature is in the middle, the expected temperature of the power electronic equipment is set to be the third expected operating temperature T ref3 ；
When the temperature of the power electronic equipment is greater than the third operating temperature T 3 Forcing the execution mechanism of the heat radiation equipment to work at the maximum speed and send out an alarm signal;
when the operating temperature T is desired ref The desired operating temperature T when crossing between the desired operating temperatures ref Adopting a primary slope function to carry out transition;
preferably, the preset speed n of the radiator actuator set Set to 50% n N Desired operating temperature T of power electronics ref Setting the temperature to 45 ℃; at a desired operating speed n using a heat sink actuator ref The ramp function is added once to make the transition.
Further, the rotational speed command is obtained by:
ifn ref ＜0,n ref ＝0
wherein n is ref For the desired operating speed of the radiator actuator, n set The speed of the execution mechanism of the heat dissipation device is preset; t is the predicted power electronic device temperature, T ref To set the expected operating temperature of the power electronic equipment, T max T for maximum allowable power electronics operating temperature min N, the operating temperature of the minimum power electronic device is allowed N The rated rotation speed of the execution mechanism of the heat radiation equipment is set; defining n ref >0。
Based on the above heat dissipation adjustment method, the reason and the process of heat dissipation adjustment will be briefly described below by taking an emergency power supply device as an example. Because a large number of power electronic devices are adopted in the emergency power supply device, and because a large amount of heat is generated when the power electronic devices work, when the device is in standby or running, the heat is brought to the outside of the device by adding the heat dissipation device. The heat dissipation capacity of the heat dissipation device of each part of the emergency power supply device is designed to be more than 2% of the total capacity of the emergency power supply device, namely, the system efficiency is about 98%. When the system is in standby or light running, a large amount of unnecessary energy waste is generated by the heat dissipation device, and the energy comes from the battery power stored by the emergency power supply device, so that the heat dissipation efficiency of the heat dissipation device reduces the running efficiency of the emergency device and shortens the effective time of the emergency work of the battery. In order to improve the emergency power supply efficiency of the elevator control power supply, the corresponding emergency power supply device performs heat dissipation adjustment based on model prediction, and the adjustment process comprises the following steps: collecting the temperature of a power supply device, and performing pressure-frequency conversion on the temperature value to obtain a frequency signal; receiving a frequency signal of the temperature of the power supply device, obtaining a temperature value of the power supply device by decoding the frequency signal, and carrying out communication coding on the temperature value; fitting the digital temperature value to obtain a real-time heat dissipation model of the power supply device; predicting the temperature of the power supply device at the next moment according to a real-time heat dissipation model of the power supply device; and controlling the change of the rotating speed of the executing mechanism of the power supply device according to the predicted temperature of the power supply device.
In this embodiment, the temperature of the power electronics is predicted from the current and temperature by collecting the power electronics temperature. The different heat dissipation speeds of the power electronic device and the heat sink result from different thermal resistances, and thus different prediction step sizes. According to the thermal resistance and the heat dissipation speed, the prediction step length is selected to be 1 second. The expected operating temperature of the power supply device is set to 60 degrees, the allowable maximum operating temperature of the power supply device is set to 100 degrees, the allowable minimum operating temperature of the power supply device is set to 20 degrees, and the rated rotation speed of the power supply device actuator is 6000r/min. The expected operating speed n of the power supply device actuator can be calculated based on the predicted power supply device temperature ref . The temperature of the power electronic device in the emergency power conversion system is predicted, namely, the future temperature of the power electronic device is predicted according to the temperature and the current, and then the running speed of the heat radiating device is adjusted according to the predicted temperature, so that the loss of the power conversion system is reduced, the efficiency of the power conversion system is improved, the consumption of the stored energy of a battery is reduced, the time of energy storage type emergency power supply of the elevator is prolonged, and the working capacity of the energy storage type emergency power supply system of the elevator is improved.
The energy storage type emergency power supply and drive control method for the induction motor elevator provided by the invention realizes energy storage for a battery link when the elevator commercial power supply is normal; when the mains supply of the elevator is abnormal, the battery energy storage link provides an emergency power supply for the elevator. The system which adopts the diesel engine as the emergency power supply in the prior art is replaced, the control flow of the emergency work of the elevator is perfected, the power supply problem of a low-voltage control part of the system is effectively solved, the energy recovery and high-performance speed regulation under the emergency power supply are realized, and the safety of the elevator system is improved. According to the control flow for charging the battery in the non-emergency working state, the charging problem of the energy storage link in the emergency power supply device is solved, the maintenance workload of the battery link is reduced, and the reliability of emergency power supply is improved.
In order to realize the improvement of emergency power supply of a diesel engine in the prior art, the invention provides an energy storage type emergency power supply and drive control device of a mine induction motor elevator, and referring to fig. 5, the device comprises:
the acquisition module is used for acquiring the working states of the circuit 1 and the circuit 2 of the mains supply in real time;
the first judging module is used for judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2;
The power supply starting module is used for converting direct current stored in the battery into three-phase alternating current control electricity;
the auxiliary and electric control starting module is used for starting the auxiliary unit and the electric control unit of the elevator and judging whether the elevator has running conditions or not;
the elevator operation and vector control module is used for receiving elevator operation instructions and controlling the operation of the elevator according to the operation instructions
The second judging module is used for judging whether the emergency power supply mode is exited or not;
and the switching module is connected with the first judging module and the second judging module and is used for switching the power supply mode of the elevator according to the judging results of the first judging module and the second judging module.
In an embodiment of the present application, the power starting module includes:
and a battery starting module: detecting whether the working state of the battery is normal; the battery operating state includes: battery voltage, power, and temperature;
the starting power supply generating module is used for generating a starting power supply to enter a power supply conversion link by utilizing the electric energy stored by the battery; the power conversion link selects a conversion mode for converting direct current stored by the battery into three-phase alternating current according to whether the direct current side voltage is larger than the effective value of the emergency power line voltage or whether a three-phase power supply is needed;
The electric energy conversion module is used for converting direct-current electric energy into three-phase alternating-current electric energy according to the selected conversion mode;
when the DC side voltage is less than the effective value of the emergency power line voltageAt the time of the doubling,a first direct current boosting module is added between the starting power supply generating module and the electric energy conversion module; when a three-phase power supply is needed, the power supply generating module is started to be directly connected with the alternating current conversion module, and a second direct current boosting module is added.
When the elevator is a double-fed motor, a switching device in an energy storage type emergency power supply and drive control device of the mine induction motor elevator, which takes the elevator as an induction motor, is set as a switching and improvement reversing module, and the switching and improvement reversing module is used for switching control power and power of a power supply system of the induction motor elevator from a mains supply loop to an emergency power supply loop and short-circuiting the stator side of the double-fed motor; the method is used for switching the elevator from emergency power supply to mains supply after the elevator exits the emergency working mode, and eliminating the stator side short circuit of the doubly-fed motor. Fig. 6 shows an improved stator commutation module in accordance with one embodiment of the present invention. In the figure 1001, three-phase high-voltage ac power is typically 6KV or 10KV. K1 controls the stator power supply phase sequence to supply power according to the positive sequence, and K2 controls the stator power supply to supply power according to the negative sequence. When the motor is in a mains supply mode, K1 is attracted when the motor rotates positively, K2 is disconnected, K2 is attracted when the motor rotates reversely, and K1 is disconnected. K3 is a newly added stator short-circuit contactor and is used for short-circuiting the stator three phases in an emergency power supply mode. The elevator operation and vector control module in the mine induction motor elevator energy storage type emergency power supply and drive control device which takes the elevator as an induction motor is set to receive elevator operation instructions, change the vector control mode of the doubly-fed motor and control the operation of the elevator according to the operation instructions.
It should be noted that, when executing the energy storage type emergency power supply and drive control method of the mine induction motor elevator provided by the embodiment, only the division of the above functional modules is used for illustration, and in practical application, the above functional allocation may be completed by different functional modules according to the need, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the embodiment of the energy storage type emergency power supply and drive control device for the mine induction motor hoist and the embodiment of the energy storage type emergency power supply and drive control method for the mine induction motor hoist provided in the foregoing embodiments belong to the same concept, and the implementation process is shown in detail in the embodiment of the energy storage type emergency power supply and drive control device for the mine induction motor hoist, which is not described herein again.
The power supply device in the embodiment of the invention adopts a circuit topology as shown in fig. 7. The three-phase rectifier is provided with an LCL filter, and the main loop is a fully-controlled switch semiconductor device. The input dc terminals 1201 and 1202 are connected to a dc bus, the three-phase inductor 1204, the three-phase capacitor 1205, and the three-phase inductor 1206 form an LCL filter, and 1207 is a three-phase output terminal.
The charge-discharge device in the embodiment of the invention is shown in fig. 8, and consists of a current reversible chopper circuit. When the battery is charged in the normal working mode and energy is fed back to the battery in the emergency working mode, the reversible chopper circuit works in the step-down mode, the voltage of the direct current bus is reduced, and the charging current is controlled to charge the battery. When the power supply is output to the control electric switching device in the emergency working mode, the reversible chopper circuit works in the boosting mode, the battery voltage is boosted, and the discharge current is controlled to stabilize the voltage of the direct current bus. In this circuit, a positive bus bar is connected to a terminal 1301, a negative bus bar is connected to a terminal 1302, a power semiconductor device in which an IGBT and a diode are connected in parallel to a device 1303 and a device 1304, a positive electrode of a battery module is connected to a terminal 1306, a negative electrode of the battery module is connected to a terminal 1307, and an inductance 1305 is provided between a terminal 1306 and an intermediate point between the device 1303 and the device 1304. Additionally, the charge-discharge module may be composed of an isolated or non-isolated DC-DC converter. The battery device is composed of an energy storage element and a battery management unit. Energy storage elements such as lithium ion batteries, supercapacitors, lead storage batteries, nickel-based secondary alkaline batteries, and the like. In the embodiment, lithium ion batteries are adopted, the lithium ion batteries are connected in series to form a series module, and then a plurality of groups of series modules are connected in parallel to form a battery pack. The battery management unit can be used for battery state information acquisition, control, information transmission, parameter monitoring, protection control, battery equalization, electric quantity metering and the like.
The elevator operation and vector control module comprises a device for controlling the elevator operation according to the battery charge state and the load quality, and the structure schematic diagram of the device is shown in fig. 9. The device comprises:
zero speed control and energy calculation module: the inverter is used for controlling the zero-speed running of the motor through the inverter, calculating the load of the elevator and the energy consumed by lifting the load or the energy fed back by lowering the load.
And a judging module: and the device is used for judging whether the lifting or the lowering is allowed or not according to the energy consumed or fed back by the lifting or the lowering of the payload m and the charge state of the battery.
Maximum allowable speed calculation module: the method is used for calculating the maximum allowable running speed of the elevator and controlling the actual running speed of the elevator to be smaller than or equal to the maximum running speed.
And the parking control module is used for: and the control device is used for controlling the elevator to decelerate and stop when receiving the stop command. And when an emergency stop command is received, controlling the elevator to stop by the brake immediately.
As shown in fig. 10, an inverter is used in the hoist operation control module, and the inverter is connected to a positive bus bar by a terminal 1501 and to a negative bus bar by a terminal 1502. The main loop is composed of a fully controlled switching semiconductor device 1503. The output three-phase terminal 1504 is connected to a power electric switching device.
It should be noted that, each functional module in the embodiment of the present invention may be integrated in one processing module, or each unit may exist separately and physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Claims (10)

1. An energy storage type emergency power supply and drive control method for a mine induction motor hoister is characterized by comprising the following steps of: the method comprises the following steps:
collecting working states of the mains supply loop 1 and the mains supply loop 2 in real time;
judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2;
switching the elevator from mains supply to emergency supply by putting the elevator into an emergency supply mode; the emergency power supply power is provided by a battery;
converting the direct current stored by the battery into three-phase alternating current control electricity;
Starting an auxiliary unit and an electric control unit of the elevator, and judging whether the elevator has running conditions or not;
receiving an operation instruction of the elevator, and controlling the operation of the elevator according to the operation instruction;
judging whether to exit the emergency power supply mode according to the normal working state of the mains supply loops 1 and 2;
and (3) exiting the emergency working mode, and switching the elevator from emergency power supply to mains supply.
2. The mine induction motor hoist energy storage type emergency power supply and drive control method as claimed in claim 1, characterized by comprising the following steps: the method for converting the direct current stored in the battery into three-phase alternating current control electricity comprises the following steps:
detecting whether the working state of the battery is normal; the battery operating state includes: battery voltage, power, and temperature;
generating a starting power supply by using the electric energy stored by the battery to enter a power supply conversion link;
the power conversion link selects a conversion mode for converting direct current stored by the battery into three-phase alternating current according to whether the direct current side voltage is larger than the effective value of the emergency power line voltage or whether a three-phase power supply is needed;
and converting the direct-current electric energy into three-phase alternating-current electric energy according to the selected conversion mode.
3. The mine induction motor hoist energy storage type emergency power supply and drive control method as claimed in claim 2, characterized by comprising the following steps: the converting the direct current electric energy into three-phase alternating current electric energy according to the selected conversion mode comprises the following steps:
When the voltage of the direct current side is larger than the effective value of the voltage of the emergency power lineWhen the power is multiplied, a conversion mode of directly converting direct-current electric energy into three-phase alternating-current control electricity is selected;
when the voltage of the direct current side is smaller than the effective value of the voltage of the emergency power lineWhen the voltage is multiplied, the output direct-current voltage is boosted to a first direct-current voltage set value, and then the direct-current electric energy is converted into an alternating-current control electric energy conversion mode;
when a three-phase power supply is needed, a conversion mode of converting direct-current electric energy into alternating-current electric energy and then boosting output voltage to a second direct-current voltage set value is selected; the second direct-current voltage set value is the effective value of the line voltage of the power supply of the elevatorDoubling; the second direct-current voltage set value is larger than or equal to the first direct-current voltage set value;
the conversion of direct current electric energy into three-phase alternating current electric energy comprises three stages:
the first stage, controlling the frequency of the output alternating voltage to be a set frequency;
the second stage, the amplitude of the alternating voltage is increased to a set value of the amplitude of the alternating voltage according to a slope;
the third stage, the outer loop closed-loop control of the amplitude and frequency of the power supply voltage is carried out, and the outer loop closed-loop control outputs the given value of the active current and the reactive current; sampling to obtain active current and reactive current feedback values, and then performing inner loop closed-loop control on the active current and the reactive current, and finally outputting the emergency power supply with stable amplitude and frequency.
4. The mine induction motor hoist energy storage type emergency power supply and drive control method as claimed in claim 1, characterized by comprising the following steps: the method for controlling the operation of the elevator comprises the steps of receiving an operation instruction of the elevator, and before controlling the operation of the elevator according to the operation instruction, further comprising: and (5) according to the charge state and the load quality of the battery, predicting whether the current lifting or lowering is allowed.
5. The energy-storage type emergency power supply and driving control method for the mine induction motor hoist as claimed in claim 4, wherein the method comprises the following steps: the pre-judging whether to allow the lifting or the lowering this time includes:
the zero-speed running of the motor is controlled, and the load of the hoisting machine is calculated, so that the energy consumed by the load is lifted or the energy fed back by the load is lowered;
judging whether the residual available electric quantity of the battery can meet the current lifting or lowering according to the energy consumed by lifting or lowering the effective load or the feedback state of charge of the battery;
if the battery can meet the current lifting or lowering, calculating the maximum allowable running speed of the elevator, controlling the actual running speed of the elevator to be less than or equal to the maximum running speed, and continuing the lifting or lowering process;
if the battery can not meet the lifting or lowering requirement, a parking or emergency parking command is sent;
when a parking command is received, controlling the elevator to decelerate and park; and when an emergency stop command is received, controlling the elevator to stop by the brake immediately.
6. The mine induction motor hoist energy storage type emergency power supply and drive control method as claimed in claim 1, characterized by comprising the following steps:
when the mine induction motor adopts a double-fed motor, when the elevator is switched from mains supply to emergency supply, the stator side is required to be connected in a short circuit manner; when receiving the operation instruction of the elevator, the vector control mode of the doubly-fed motor is changed firstly, and then the operation of the elevator is controlled according to the operation instruction;
the changing the vector control mode of the double-fed motor comprises the following steps:
when the elevator works in a non-emergency mode, the stator of the doubly-fed motor is powered by mains supply, the rotor is powered by the frequency converter, and at the moment, the motor control strategy adopts vector control based on stator flux linkage orientation;
when the elevator works in an emergency mode, the stator is short-circuited, the rotor side is powered by the frequency converter, and the motor control strategy adopts vector control based on rotor flux linkage orientation.
7. The mine induction motor hoist energy storage type emergency power supply and drive control method as claimed in claim 1, characterized by comprising the following steps: the energy storage type emergency power supply and drive control method of the mine induction motor hoister further comprises the following steps: the battery is charged and managed in a non-emergency working state in a mains supply state;
The battery charge management in the non-emergency working state under the mains supply state comprises:
detecting whether the elevator system is powered by mains supply;
judging whether the battery needs to be charged or not; the judging method is that when the charge quantity indicated by the charge state of the battery is lower than the first charge quantity, the battery is started to be charged; a margin is reserved between the first charging charge and the full charging charge of the battery; the first charging charge is set to be the full battery capacity minus the potential energy of the single-drop lifting container; the potential energy of the single-lowering lifting container is as follows:
Ep＝mgh
where Ep is gravitational potential energy, m is the mass of the lifting container, g is the gravitational acceleration of the earth's surface, and h is the well depth;
selecting a charging mode according to whether a charging and discharging device exists between the power supply device and the battery device; if no charge-discharge device exists between the power supply device and the battery device, controlling the power supply device to work in a rectification mode, charging the battery device, and stopping charging the battery when the charge quantity of the charge state indication charge of the battery is larger than or equal to the first charge quantity;
if a charging and discharging device is arranged between the power supply device and the battery device, controlling the power supply device to work in a rectification mode and controlling the charging and discharging device to work in a voltage reduction mode to charge the battery;
Stopping charging the battery when the charge quantity of the charge state indication charge of the battery is greater than or equal to the first charge;
the working process for controlling the charge-discharge device to work in the step-down mode to charge the battery comprises the following steps: the first stage, charging current is controlled to charge according to a constant current mode; and in the second stage, the charging voltage is controlled to charge the battery in a constant voltage charging mode.
8. The energy-storage type emergency power supply and driving control method for the mine induction motor elevator as claimed in claim 7, wherein the method comprises the following steps of: the method further comprises the steps of: performing model-based predictive heat dissipation adjustment of a power electronic device including an electric energy conversion portion of an excitation circuit and an armature circuit of a motor, and a power electronic device used in an emergency power supply apparatus, the heat dissipation adjustment process including:
collecting the temperature of power electronic equipment, and performing pressure-frequency conversion on the temperature value to obtain a frequency signal;
receiving a frequency signal of the temperature of the power electronic equipment, obtaining a temperature value of the power electronic equipment by decoding the frequency signal, and carrying out communication coding on the temperature value;
fitting the digital temperature value to obtain a real-time heat dissipation model of the power electronic equipment;
Predicting the temperature of the power electronic device at the next moment according to a real-time heat dissipation model of the power electronic device;
and controlling the change of the rotating speed of the executing mechanism of the heat dissipation device according to the predicted temperature and the heat dissipation mode of the power electronic device.
9. The energy-storage type emergency power supply and driving control method for the mine induction motor elevator as claimed in claim 8, wherein the method comprises the following steps of: the real-time heat dissipation model is as follows:
wherein T represents a temperature matrix of the power supply device; x represents a two-dimensional variable matrix, X= [ It ]] T Wherein I represents a three-phase current effective value, and t represents the running time of the system;estimating a regression coefficient;
the predicted power electronics device temperature at the next time is:
setting a two-dimensional variable matrix x= [ I (k) t+nΔt] T Calculating a predicted temperature value of the power supply device under the condition of a two-bit variable matrix;
wherein I (k) is an effective value of three-phase given current at the current calculation time by adopting a digital signal processing chip, delta T is set as heat conduction time transmitted to a temperature acquisition point by a power electronic device, and n is a prediction step length;
the heat dissipation mode includes: a high performance heat dissipation mode and a low power dissipation mode; the high-performance heat dissipation mode is to fix expected operation temperature, compare the predicted temperature with the set temperature in real time to obtain an operation rotating speed instruction of the execution mechanism of the heat dissipation device, and further control the execution mechanism of the heat dissipation device to operate according to the instruction rotating speed; the low-power dissipation mode refers to that the expected operation temperature is not fixed, and the expected operation temperature T linearly related to the expected operation temperature curve is obtained through the expected operation temperature curve ref According to the expected operating temperature T ref Obtaining an operation rotating speed instruction of the execution mechanism of the heat radiation device, and further controlling the execution mechanism of the heat radiation device to operate according to the instruction rotating speed;
the desired operating temperature T linearly related to the desired operating temperature curve is obtained through the desired operating temperature curve ref Comprising:
when the temperature of the power electronic equipment is lower than the ambient temperature T 0 First desired operating temperature T ref1 Is ambient temperature;
when the temperature of the power electronic equipment is at the first operating temperature T 1 And a second operating temperature T 2 When the temperature is in between, the expected temperature of the power electronic equipment is set to be the second expected operating temperature T ref2 ；
When the temperature of the power electronic equipment is at the second operating temperature T 2 And a third operating temperature T 3 When the temperature is in the middle, the expected temperature of the power electronic equipment is set to be the third expected operating temperature T ref3 ；
When the temperature of the power electronic equipment is greater than the third operating temperature T 3 Forcing the execution mechanism of the heat radiation equipment to work at the maximum speed and send out an alarm signal;
when the operating temperature T is desired ref The desired operating temperature T when crossing between the desired operating temperatures ref Adopting a primary slope function to carry out transition;
the rotational speed command is obtained by the following formula:
wherein n is ref For a desired operating speed of the actuator of the power supply device, n set The method comprises the steps of presetting the speed of an executing mechanism of a power supply device; t is the predicted power supply device temperature, T ref For a set desired operating temperature of the power supply device, T max T for maximum allowable operating temperature of the power supply device min N, the operating temperature of the minimum power supply device is allowed N The rated rotation speed of the power supply device actuating mechanism is set; defining n ref >0。
10. An energy storage type emergency power supply and drive control device of a mine induction motor hoister is characterized in that: the device comprises:
the acquisition module is used for acquiring the working states of the circuit 1 and the circuit 2 of the mains supply in real time;
the first judging module is used for judging whether the mains supply mode is cut off to be put into an emergency power supply mode according to the abnormal working states of the mains supply loops 1 and 2;
the power supply starting module is used for converting direct current stored in the battery into three-phase alternating current control electricity;
the auxiliary and electric control starting module is used for starting the auxiliary unit and the electric control unit of the elevator and judging whether the elevator has running conditions or not;
the elevator operation and vector control module is used for receiving an elevator operation instruction and controlling the operation of the elevator according to the operation instruction;
the second judging module is used for judging whether the emergency power supply mode is exited or not;
and the switching module is connected with the first judging module and the second judging module and is used for switching the power supply mode of the elevator according to the judging results of the first judging module and the second judging module.
CN202311398008.3A 2023-10-25 2023-10-25 Energy storage type emergency power supply and drive control method and device for mine induction motor hoister Pending CN117559623A (en)

Priority Applications (1)

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CN202311398008.3A CN117559623A (en) 2023-10-25 2023-10-25 Energy storage type emergency power supply and drive control method and device for mine induction motor hoister

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Application Number Priority Date Filing Date Title
CN202311398008.3A CN117559623A (en) 2023-10-25 2023-10-25 Energy storage type emergency power supply and drive control method and device for mine induction motor hoister

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CN117559623A true CN117559623A (en) 2024-02-13

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