CN116470583A - Elevator self-power generation energy storage regulation and control method and system - Google Patents
Elevator self-power generation energy storage regulation and control method and system Download PDFInfo
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- CN116470583A CN116470583A CN202310543954.6A CN202310543954A CN116470583A CN 116470583 A CN116470583 A CN 116470583A CN 202310543954 A CN202310543954 A CN 202310543954A CN 116470583 A CN116470583 A CN 116470583A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010248 power generation Methods 0.000 title claims abstract description 17
- 230000002159 abnormal effect Effects 0.000 claims description 24
- 229920006395 saturated elastomer Polymers 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 12
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- 238000001514 detection method Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000001174 ascending effect Effects 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 238000007405 data analysis Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000001172 regenerating effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J7/04—Regulation of charging current or voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses an elevator self-power generation energy storage regulation and control method and system. The regenerative electric energy generated in the operation of the elevator is stored in a storage battery preferentially by a self-generating energy storage regulation method and is used as an emergency operation power supply of the elevator; after the battery is full, the rest regenerated electric energy can be fed back to the power grid for peripheral electric equipment to achieve the purpose of energy saving. The system realizes the high-efficiency utilization of the regenerated energy, has high electricity-saving rate, and adopts the automatic re-leveling function of power failure to improve the safety performance of the elevator.
Description
Technical Field
The invention belongs to the technical field of elevators, and particularly relates to an elevator self-power generation energy storage regulation and control method and system.
Background
When the elevator ascends under light load or descends under heavy load, the traction machine can convert gravitational potential energy into electric energy; mechanical kinetic energy is also converted into electrical energy when deceleration is stopped. For the regenerated energy, the braking resistor is adopted to generate heat to consume the regenerated energy in a traditional mode, and the cost is low, but the waste of electric energy is caused. With the advent of energy feedback technology, this portion of regenerated electrical energy can be fed back to the grid for use by other consumers within the building. However, due to the technical immaturity, the common feedback rate is low, and the purity is low along with harmonic interference.
Therefore, how to convert the regenerated energy of the elevator into clean electric energy for the efficient utilization of other electric equipment in the building becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a self-power generation and energy storage regulation method and system for an elevator, which are used for solving the problems in the prior art in the background technology.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides an elevator self-power generation energy storage regulation and control method, which comprises the following steps:
collecting operation data of an elevator and information of a storage battery pack;
according to the operation data of the elevator, when the elevator is in light load uplink or heavy load downlink, the storage battery pack is charged preferentially, and voltage and current signals of the storage battery pack are fed back;
judging whether the storage battery pack is in a saturated state or not according to the fed-back signal, and regulating and controlling the power output direction of the system after the situation of the mains supply is synthesized, wherein the method comprises the following steps: when the storage battery pack is in a saturated state, the feedback electric energy is integrated into an external power grid for the electric equipment in the local area network to use; when the commercial power is abnormal, the storage battery pack releases energy to be used by the elevator frequency converter.
Preferably, the collecting the operation data of the elevator and the information of the storage battery pack includes:
elevator operation data acquisition, including: the working states of the elevator control cabinet and the frequency converter are monitored in real time, and monitoring results are read and converted into digital signals;
storage battery information acquisition, including: detecting the voltage of a single battery in the storage battery, the charging and discharging current and the temperature of the storage battery, and reading the detection result in real time and converting the detection result into a digital signal;
the digital signals are collected, analyzed and transmitted.
Preferably, the charging of the storage battery pack is performed preferentially when the elevator is in a light load uplink or a heavy load downlink according to the operation data of the elevator, and the feedback of the voltage and current signals of the storage battery pack is performed, including:
establishing connection between the storage battery pack and the charging device, connecting the storage battery pack with the charging device, then connecting the storage battery pack with an elevator, connecting commercial power with the storage battery pack, and connecting commercial power with the elevator;
when the electric quantity of the storage battery pack is insufficient, the regenerated electric energy generated by the operation of the elevator charges the storage battery pack through a charging device;
and when the electric quantity of the storage battery pack is saturated, feeding back a voltage and current signal of the storage battery pack.
On the other hand, the invention provides a self-generating energy storage regulation and control system of an elevator, which comprises the following components:
the acquisition module is used for acquiring operation data of the elevator and information of the storage battery pack;
the charging module is used for charging the storage battery pack preferentially when the elevator is in light load ascending or heavy load descending according to the operation data of the elevator, and feeding back a voltage current signal of the storage battery pack;
the intelligent energy storage adjusting module is used for judging whether the storage battery pack is in a saturated state according to the fed-back signal, and adjusting and controlling the power output direction of the system after the situation of the commercial power is synthesized;
the energy-saving feedback module is used for merging feedback electric energy into an external power grid for electric equipment in the local area network when the storage battery pack is in a saturated state;
and the flat layer power supply module is used for releasing energy from the storage battery pack to the elevator frequency converter for use when the commercial power is abnormal.
Preferably, the intelligent energy storage adjusting module includes:
the battery voltage acquisition module is used for acquiring data of the voltage of a single battery in the storage battery pack;
the battery charging and discharging acquisition module is used for acquiring data of battery charging and discharging current information;
the intelligent energy storage regulation control module is used for carrying out data analysis and judgment, and meanwhile, a CPU in the intelligent energy storage regulation control module sends the processed digital signal to a UPS host or other monitoring equipment through an RS485 bus to carry out feedback for regulating the charging state or discharging dynamics.
Preferably, the energy-saving feedback module includes:
the voltage and current sampling module is used for sampling the voltage and current of the output end so as to realize synchronization and frequency tracking;
and the relay protection module is used for disconnecting when the over-temperature and the working voltage are over-high, automatically protecting and feeding back an abnormal signal.
Preferably, the flat layer power module includes:
the UPS controller module is used for controlling the working state of the UPS;
the input relay module is used for disconnecting the input relay when the commercial power is abnormal, and the UPS provides power for the load to ensure that the load works normally; when the mains supply is normal, the input relay is closed, the mains supply is directly output, and the battery is charged at the same time;
the bidirectional inverter module is used for converting the commercial power into a charging mode when the commercial power is normal, and charging the storage battery; when the commercial power is abnormal, the inverter inverts the energy stored by the storage battery into sine wave alternating current.
And the output relay module is used for disconnecting UPS output when equipment is abnormal or load is short-circuited.
The invention has the technical effects and advantages that: compared with the prior art, the elevator self-power generation energy storage regulation and control method and system provided by the invention have the following advantages:
the regenerative electric energy generated in the operation of the elevator is stored in a storage battery preferentially by a self-generating energy storage regulation method and is used as an emergency operation power supply of the elevator; after the battery is full, the rest regenerated electric energy can be fed back to the power grid for peripheral electric equipment to achieve the purpose of energy saving. The system realizes the high-efficiency utilization of the regenerated energy, the electricity saving rate can reach more than 30-45%, and the adopted automatic re-leveling function of power failure improves the safety performance of the elevator.
Drawings
Fig. 1 is a flowchart of a method for regulating and controlling self-power generation and energy storage of an elevator according to an embodiment of the invention;
fig. 2 is a block diagram of an elevator self-generating energy storage regulation system in an embodiment of the present invention;
fig. 3 is an electrical control block diagram of an elevator self-generating energy storage regulation system in an embodiment of the invention;
FIG. 4 is an electrical control block diagram of an energy saving feedback module according to an embodiment of the present invention;
FIG. 5 is an electrical control block diagram of a flat bed power module in an embodiment of the invention;
fig. 6 is an electrical control block diagram of the intelligent energy storage and regulation module in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a self-power-generation energy-storage regulation and control system for an elevator, which is used for converting gravitational potential energy into electric energy in the operation process of the elevator, particularly in heavy-load descending and light-load ascending. The regenerated electric energy is stored in a storage battery by an intelligent energy storage adjusting device preferentially and is used as an emergency operation power supply of the elevator; after the battery is full, the rest regenerated electric energy can be fed back to the power grid for the peripheral electric equipment to use, so that the energy saving purpose is achieved.
As shown in fig. 3, fig. 3 is an electrical control block diagram of an elevator self-generating energy storage regulation system according to an embodiment of the present invention.
The elevator self-generating energy storage regulation and control system adopts a modularized integrated design and is composed of an energy-saving feedback module, an intelligent energy storage regulation module and a leveling power module, and can realize an elevator regenerated energy feedback function, a maintenance-free storage battery energy storage function, an automatic power failure leveling function and an integrated control function. The intelligent energy storage adjusting module comprises an acquisition module and a charging module.
Functional description 1) when the elevator is in light load ascending or heavy load descending, regenerated energy is generated, and the feedback energy is used for charging the maintenance-free storage battery pack preferentially through vector control. 2) When the maintenance-free storage battery is in a saturated state, the feedback energy is integrated into an external power grid through intelligent energy storage regulation control, so that the maintenance-free storage battery is used by electric equipment in a local area network. 3) When the commercial power is abnormal, the maintenance-free storage battery pack releases energy, and the energy is supplied to the leveling power module for inversion output, and the power supply ladder frequency converter works, so that the elevator power failure automatic leveling function is realized.
As shown in fig. 2, fig. 2 is a block diagram of an elevator self-generating energy storage regulation system according to an embodiment of the present invention.
In this embodiment, the elevator self-generating energy storage regulation and control system includes an intelligent energy storage regulation module 103, an energy-saving feedback module 104 and a flat layer power module 105, wherein the intelligent energy storage regulation module 103 includes an acquisition module 101 and a charging module 102. The specific functions of the modules are as follows.
The collection module 101 is used for collecting operation data of the elevator and information of the storage battery pack;
further, through elevator operation data collection, include: the working states of the elevator control cabinet and the frequency converter are monitored in real time, and monitoring results are read and converted into digital signals; storage battery information acquisition, including: detecting the voltage of a single battery in the storage battery, the charging and discharging current and the temperature of the storage battery, and reading the detection result in real time and converting the detection result into a digital signal; the digital signals are collected, analyzed and transmitted.
The charging module 102 is configured to, according to the operation data of the elevator, charge the battery pack preferentially when the elevator is in a light load uplink or a heavy load downlink, and feed back a voltage current signal of the battery pack;
further, the storage battery pack is connected with the charging device by establishing the connection between the storage battery pack and the charging device, then the storage battery pack is connected with the elevator, the commercial power is connected with the storage battery pack, and the commercial power is connected with the elevator; when the electric quantity of the storage battery pack is insufficient, the regenerated electric energy generated by the operation of the elevator charges the storage battery pack through a charging device; and when the electric quantity of the storage battery pack is saturated, feeding back a voltage and current signal of the storage battery pack.
The intelligent energy storage adjusting module 103 is used for judging whether the storage battery pack is in a saturated state according to the fed-back signal, and adjusting and controlling the power output direction of the system after the situation of the commercial power is synthesized;
further, it includes: the battery voltage acquisition module is used for acquiring data of the voltage of a single battery in the storage battery pack;
further, it includes: the battery charging and discharging acquisition module is used for acquiring data of battery charging and discharging current information;
further, it includes: the intelligent energy storage regulation control module is used for carrying out data analysis and judgment, and meanwhile, a CPU in the intelligent energy storage regulation control module sends the processed digital signal to a UPS host or other monitoring equipment through an RS485 bus to carry out feedback for regulating the charging state or discharging dynamics.
Fig. 6 is an electrical control block diagram of the intelligent energy storage and regulation system according to the embodiment of the invention.
The intelligent energy storage regulating system is a special monitoring device which is designed for an elevator energy feedback device DT-FK and an elevator power failure emergency re-leveling power supply device UPS-DT01 and is used for monitoring, protecting and reporting abnormality of an energy storage device (storage battery) according to working parameters and working states of the energy storage device.
Is a comprehensive result of various technologies such as a current collecting pool measuring technology, an electronic technology, a computer control technology and the like. The device has the characteristics of on-line automatic monitoring of single battery voltage, battery pack terminal voltage, charge and discharge current and environmental temperature, rapid and accurate data acquisition, simple and convenient equipment installation, debugging and maintenance, adoption of isolation technology around each acquisition module, and high safety and reliability degree.
The intelligent energy storage adjusting system comprises an intelligent energy storage adjusting control module, a battery voltage acquisition module, a battery charge and discharge acquisition module and a communication interface.
The auxiliary device comprises:
1. the battery voltage sampling interface is used for sampling the voltage of each battery;
2. the Hall device H, the output positive line of the battery pack passes through the sampling magnetic ring and is used for sampling the charge/discharge current of the battery; the nominal current of the Hall device is 100A, and direct current below 100A can be sampled;
and the 3.48V 100A direct current breaker RLY is used for disconnecting the 48V direct current input of the battery pack and the frequency converter when the alternating current input is in a normal state.
Specifically, the function of the acquisition module is to quickly and accurately detect any changes of the voltage of the single battery, the charge-discharge current of the battery pack, the temperature and the like.
After the voltage and current signals of the batteries are transmitted to the acquisition module, the high-speed electronic switch reads the voltage and current of each battery and transmits the voltage and current signals to the 12-bit high-speed A/D conversion chip (the conversion precision reaches 1.2mV and 1.0 mA), and the voltage and current analog signals are converted into digital signals for the intelligent energy storage regulation control module CPU to acquire.
The intelligent energy storage regulation control module performs data analysis and judgment, and meanwhile, the intelligent energy storage regulation control module CPU sends the processed digital signal to a UPS host or other monitoring equipment through an RS485 bus to perform feedback for regulating the charging state or discharging dynamics.
The battery detection part at the front end of the acquisition module is connected with the fuse in series and is completely isolated from the system, the insulation strength can reach 2500V, and the safety and the reliability of the system are ensured.
Specifically, intelligent regulation function: the intelligent energy storage regulation control module adopts an electronic load technology, and realizes the check test of the battery capacity and the activation maintenance of the battery through the detection of the battery load capacity.
When receiving the low-voltage instruction from the main control equipment (intelligent energy storage regulation control module), the electrified load (rectifying circuit) is switched on (numerical control type), and the battery is charged and floated.
When receiving the overvoltage instruction from the main control equipment (intelligent energy storage regulation control module), the electrified load (rectifying circuit) is disconnected (numerical control type), and the battery is disconnected to be charged.
When receiving the power-off instruction from the main control equipment (the elevator power-off emergency re-leveling power supply device UPS-DT 01), the power-on load (the inverter circuit) is turned on, the battery discharges, and the acquisition module rapidly acquires each variation of the voltage of each battery.
The energy-saving feedback module 104 is used for integrating feedback electric energy into an external power grid for the electric equipment in the local area network when the storage battery pack is in a saturated state;
further, it includes: the voltage and current sampling module is used for sampling the voltage and current of the output end so as to realize synchronization and frequency tracking;
further, it includes: and the relay protection module is used for disconnecting when the over-temperature and the working voltage are over-high, automatically protecting and feeding back an abnormal signal.
Fig. 4 is an electrical block diagram of the energy saving feedback system according to the embodiment of the invention.
The energy-saving feedback system absorbs regenerated energy according to the characteristic of reverse irrigation of the elevator energy, and feeds the energy back to the power grid, so that the purpose of saving energy is achieved, and the running cost of the elevator is reduced.
The functions are as follows:
sampling voltage and current: sampling voltage and current from an output end to achieve synchronization and frequency tracking;
and (3) relay protection: when over-temperature and working voltage are too high, the circuit is disconnected, automatically protects and feeds back abnormal signals
Feedback mode: adopting current to follow a voltage waveform, wherein the current is a sine wave;
energy feedback action voltage: the actuation voltage is 630VDC + 10VDC.
The technical characteristics are as follows:
ac input characteristics: three-phase three-wire system alternating current power supply; the alternating current input voltage ranges from 300V to 440V;
the power grid frequency is 45-66 Hz; good grounding is required.
Dc input characteristics: the direct-current voltage range is DC 485-900V; the energy feedback starting control voltage standard is 630+/-10 VDC, 620-690 VDC (adjustable).
Output characteristics: an output voltage, following the grid input voltage; the output frequency follows the input frequency of the power grid; outputting a waveform and a distortion degree, wherein a voltage waveform follows a power grid waveform, and a current waveform is a sine wave; the conversion efficiency is more than or equal to 94 percent (under the condition that the power grid voltage is rated voltage); noise is less than or equal to 70dBA (elevator constant speed operation stage).
Illustratively, a flat layer power module 105 for discharging energy from the battery pack for use by the ladder inverter in the event of a mains anomaly;
further, it includes: the UPS controller module is used for controlling the working state of the UPS;
further, it includes: the input relay module is used for disconnecting the input relay when the commercial power is abnormal, and the UPS provides power for the load to ensure that the load works normally; when the mains supply is normal, the input relay is closed, the mains supply is directly output, and the battery is charged at the same time;
further, it includes: the bidirectional inverter module is used for converting the commercial power into a charging mode when the commercial power is normal, and charging the storage battery; when the commercial power is abnormal, the inverter inverts the energy stored by the storage battery into sine wave alternating current.
Further, it includes: and the output relay module is used for disconnecting UPS output when equipment is abnormal or load is short-circuited.
As shown in fig. 5, fig. 5 is an electrical control block diagram of a flat layer power module according to an embodiment of the invention.
The flat floor power supply system is an emergency flat floor power supply device specially designed and developed for an elevator according to the UPS working principle and characteristics. When the power grid input is normal, the UPS is in a mains input standby state. When the input of the power grid is abnormal, the UPS is converted into an inversion output state according to a specific time sequence requirement, and the output AC380V is supplied to an elevator control system.
As shown in fig. 5, in the drawing:
EMI/RFI filter: the peak interference can be restrained, and the electromagnetic interference and the radio frequency interference can be effectively eliminated.
Input relay: when the commercial power is abnormal, the input relay is disconnected, and the UPS provides power for the load, so that the load is ensured to work normally. When the mains supply is normal, the input relay is closed, the mains supply is directly output, and the battery is charged.
Bidirectional inverter: when the commercial power is normal, the bidirectional inverter converts the commercial power into a charging mode to charge the storage battery; when the commercial power is abnormal, the inverter inverts the energy stored by the storage battery into sine wave alternating current.
Output relay: and when the equipment is abnormal or the load is short-circuited, the UPS output is disconnected.
Ac air-break, dc air-break: the equipment input circuit breaking equipment can play a role in protection and also has a switching effect.
And (3) a controller: and a control CPU of the UPS.
The method has the following characteristics:
an intelligent control core technology;
the battery has perfect protection functions of overload, short circuit, battery overcharge/overdischarge, overvoltage and low-voltage protection of input/output, overheat protection and the like.
After the battery is under-voltage protected, the mains supply is powered on, and the UPS can be automatically started to output.
After receiving the SD shutdown signal, the UPS shuts down the inversion work, and if the commercial power is not recovered after 5 seconds, the UPS shuts down the internal detection power supply of the UPS to protect the battery. If the commercial power is recovered within 5 seconds, the UPS can be restarted automatically and is in a normal power supply state to charge the battery. If the emergency leveling program is not started within 5 seconds after the power failure, the commercial power is recovered, the UPS automatically turns into a normal power supply state, and the battery is charged.
In addition, in the embodiment, based on the self-power generation and energy storage regulation and control system of the elevator, the invention provides a self-power generation and energy storage regulation and control method of the elevator.
As shown in fig. 1, fig. 1 is a flowchart of an elevator self-power-generation energy-storage regulation method in an embodiment of the invention.
In this embodiment, a self-power generation and energy storage regulation method for an elevator includes the following steps:
s1, acquiring operation data of an elevator and information of a storage battery pack;
specifically, through elevator operation data acquisition, include: the working states of the elevator control cabinet and the frequency converter are monitored in real time, and monitoring results are read and converted into digital signals; storage battery information acquisition, including: detecting the voltage of a single battery in the storage battery, the charging and discharging current and the temperature of the storage battery, and reading the detection result in real time and converting the detection result into a digital signal; the digital signals are collected, analyzed and transmitted.
Illustratively, the function of the acquisition module is to quickly and accurately detect any changes in cell voltage, battery pack charge-discharge current, temperature, etc.
When the battery voltage and current signals are transmitted to the acquisition module, the high-speed electronic switch reads the voltage and current of each battery and transmits the voltage and current signals to the 12-bit high-speed A/D conversion chip (the conversion precision reaches 1.2mV and 1.0 mA), and the voltage and current analog signals are converted into digital signals for acquisition by the intelligent energy storage regulation control module CPU.
The intelligent energy storage regulation control module analyzes and judges data, and the intelligent energy storage regulation control module CPU sends the processed digital signals to the UPS host or other monitoring equipment through the RS485 bus to regulate the charging state or feed back the discharging dynamics.
S2, according to the operation data of the elevator, when the elevator ascends in light load or descends in heavy load, the storage battery pack is charged preferentially, and voltage and current signals of the storage battery pack are fed back;
specifically, a connection between a storage battery pack and a charging device is established, the storage battery pack is connected with the charging device, then the storage battery pack is connected with an elevator, a commercial power is connected with the storage battery pack, and the commercial power is connected with the elevator; when the electric quantity of the storage battery pack is insufficient, the regenerated electric energy generated by the operation of the elevator charges the storage battery pack through a charging device; and when the electric quantity of the storage battery pack is saturated, feeding back a voltage and current signal of the storage battery pack.
S3, judging whether the storage battery pack is in a saturated state or not according to the fed-back signal, and regulating and controlling the power output direction of the system after the situation of the mains supply is synthesized, wherein the method comprises the following steps: when the storage battery pack is in a saturated state, the feedback electric energy is integrated into an external power grid for the electric equipment in the local area network to use; when the commercial power is abnormal, the storage battery pack releases energy to be used by the elevator frequency converter.
The specific steps are as follows:
1) When the elevator is in light load ascending or heavy load descending, regenerated energy is generated, and the maintenance-free storage battery pack is charged with the feedback energy preferentially through vector control.
2) When the maintenance-free storage battery is in a saturated state, the feedback energy is integrated into an external power grid through intelligent energy storage regulation control, so that the maintenance-free storage battery is used by electric equipment in a local area network.
3) When the commercial power is abnormal, the maintenance-free storage battery pack releases energy, and the energy is supplied to the leveling power module for inversion output, and the power supply ladder frequency converter works, so that the elevator power failure automatic leveling function is realized.
According to the method, the regenerated electric energy generated in the operation of the elevator is stored in the storage battery preferentially by a self-power generation and energy storage regulation method and is used as an emergency operation power supply of the elevator; after the battery is full, the rest regenerated electric energy can be fed back to the power grid for peripheral electric equipment to achieve the purpose of energy saving. The elevator self-generating energy storage regulation and control system realizes the efficient utilization of regenerated energy, the electricity saving rate can reach more than 30-45%, and the adopted automatic re-leveling function of power failure improves the safety performance of the elevator.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The self-power generation and energy storage regulation and control method for the elevator is characterized by comprising the following steps of:
collecting operation data of an elevator and information of a storage battery pack;
according to the operation data of the elevator, when the elevator is in light load uplink or heavy load downlink, the storage battery pack is charged preferentially, and voltage and current signals of the storage battery pack are fed back;
judging whether the storage battery pack is in a saturated state or not according to the fed-back signal, and regulating and controlling the power output direction of the system after the situation of the mains supply is synthesized, wherein the method comprises the following steps: when the storage battery pack is in a saturated state, the feedback electric energy is integrated into an external power grid for the electric equipment in the local area network to use; when the commercial power is abnormal, the storage battery pack releases energy to be used by the elevator frequency converter.
2. The method for regulating and controlling the self-power generation and energy storage of the elevator according to claim 1, wherein the step of collecting the operation data of the elevator and the information of the storage battery pack comprises the following steps:
elevator operation data acquisition, including: the working states of the elevator control cabinet and the frequency converter are monitored in real time, and monitoring results are read and converted into digital signals;
storage battery information acquisition, including: detecting the voltage of a single battery in the storage battery, the charging and discharging current and the temperature of the storage battery, and reading the detection result in real time and converting the detection result into a digital signal;
the digital signals are collected, analyzed and transmitted.
3. The method for regulating and controlling the self-power generation and energy storage of the elevator according to claim 1, wherein the step of charging the storage battery pack preferentially and feeding back the voltage and current signals of the storage battery pack when the elevator is in a light load uplink or a heavy load downlink according to the operation data of the elevator comprises the following steps:
establishing connection between the storage battery pack and the charging device, connecting the storage battery pack with the charging device, then connecting the storage battery pack with an elevator, connecting commercial power with the storage battery pack, and connecting commercial power with the elevator;
when the electric quantity of the storage battery pack is insufficient, the regenerated electric energy generated by the operation of the elevator charges the storage battery pack through a charging device;
and when the electric quantity of the storage battery pack is saturated, feeding back a voltage and current signal of the storage battery pack.
4. An elevator self-generating energy storage regulation and control system, which is characterized by comprising:
the acquisition module is used for acquiring operation data of the elevator and information of the storage battery pack;
the charging module is used for charging the storage battery pack preferentially when the elevator is in light load ascending or heavy load descending according to the operation data of the elevator, and feeding back a voltage current signal of the storage battery pack;
the intelligent energy storage adjusting module is used for judging whether the storage battery pack is in a saturated state according to the fed-back signal, and adjusting and controlling the power output direction of the system after the situation of the commercial power is synthesized;
the energy-saving feedback module is used for merging feedback electric energy into an external power grid for electric equipment in the local area network when the storage battery pack is in a saturated state;
and the flat layer power supply module is used for releasing energy from the storage battery pack to the elevator frequency converter for use when the commercial power is abnormal.
5. The elevator self-generating energy storage regulation system of claim 4, wherein the intelligent energy storage regulation module comprises:
the battery voltage acquisition module is used for acquiring data of the voltage of a single battery in the storage battery pack;
the battery charging and discharging acquisition module is used for acquiring data of battery charging and discharging current information;
the intelligent energy storage regulation control module is used for carrying out data analysis and judgment, and meanwhile, a CPU in the intelligent energy storage regulation control module sends the processed digital signal to a UPS host or other monitoring equipment through an RS485 bus to carry out feedback for regulating the charging state or discharging dynamics.
6. The elevator self-generating energy storage regulation and control system of claim 4, wherein the energy-saving feedback module comprises:
the voltage and current sampling module is used for sampling the voltage and current of the output end so as to realize synchronization and frequency tracking;
and the relay protection module is used for disconnecting when the over-temperature and the working voltage are over-high, automatically protecting and feeding back an abnormal signal.
7. The elevator self-generating energy storage regulation system of claim 4, wherein the flat floor power module comprises:
the UPS controller module is used for controlling the working state of the UPS;
the input relay module is used for disconnecting the input relay when the commercial power is abnormal, and the UPS provides power for the load to ensure that the load works normally; when the mains supply is normal, the input relay is closed, the mains supply is directly output, and the battery is charged at the same time;
the bidirectional inverter module is used for converting the commercial power into a charging mode when the commercial power is normal, and charging the storage battery; when the commercial power is abnormal, the inverter inverts the energy stored by the storage battery into sine wave alternating current.
And the output relay module is used for disconnecting UPS output when equipment is abnormal or load is short-circuited.
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