CN110224421A - Distributed energy storage elevator control system and topological structure - Google Patents
Distributed energy storage elevator control system and topological structure Download PDFInfo
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- CN110224421A CN110224421A CN201910524503.1A CN201910524503A CN110224421A CN 110224421 A CN110224421 A CN 110224421A CN 201910524503 A CN201910524503 A CN 201910524503A CN 110224421 A CN110224421 A CN 110224421A
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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
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Abstract
The present invention relates to elevator energy-saving control technology field, a kind of distributed energy storage elevator control system and its topological structure are proposed, it is intended to it is high and the problems such as network load wave crest electricity consumption wave crest paddy stops to solve electric cost in current elevator operation.The system includes: that controller, driving device connect power grid with the input terminal of driving device described in energy storage device, and output end is connected to the traction motor that elevator is set；The energy storage device is connect with the driving device, and the controller is connect with the driving device and the energy storage device respectively；Controller is for controlling the driving device connected to it and the energy-storage module according to accessed information relevant to elevator operation；Driving device is used to drive the traction motor of elevator according to the command information of the controller；Energy storage device is used to carry out energy storage according to the command information of the controller or power to the driving device.The present invention realizes the peak load shifting function of elevator customer side and feedback energy recycles.
Description
Technical Field
The invention relates to the technical field of elevator control, in particular to a distributed energy storage elevator control system and a topological structure.
Background
In recent years, as the economic growth and the increase of industrial and electric products cause the rapid growth of electric loads, the peak-to-valley difference of the load of the power grid gradually increases. The elevator has become the indispensable vehicle in people's life, and at present, the elevator market reserves more than 600 ten thousand to still increase year by year, the power consumption is huge, and has the power consumption characteristics of power consumption in daytime, standby at night. Therefore, the elevator system equipment is one of the loads with larger power consumption of the power distribution network and is one of the important sources of load peak-valley difference of the local power network.
At present, the peak regulation problem of the power grid is solved by mostly establishing an energy storage hydropower station, a thermal power station and a centralized energy storage power station for regulation. The energy storage hydropower station accumulates energy by pumping water at a low position to a high position, and generates electricity when the power grid needs the energy storage hydropower station, so that the peak clipping and valley filling effects are realized; the energy storage thermal power station realizes peak clipping and valley filling by starting and stopping a part of small-capacity units; the centralized energy storage power station is characterized in that an electrochemical new energy battery energy storage power station is built in a centralized area.
However, the energy storage hydropower station needs to be newly built with a dam, corresponding equipment and an additional construction site are invested, and the investment is large; the energy storage thermal power station needs to invest in more units in the thermal power station, and the operation cost of the system is increased; the centralized energy storage power station needs to separately build a battery pack field, voltage transformation equipment and the like, and one-time investment is large.
Disclosure of Invention
The problems that in the prior art, peak-valley difference of a local power grid is large due to the fact that elevators are used in large quantities, most of devices or equipment for clipping and filling peaks are large in investment, long in period, wide in occupied area and special sites are needed are solved, and meanwhile when the elevator equipment runs in a power generation mode, feedback electric energy cannot be effectively utilized, and only the brake resistor is used for consuming the feedback electric energy. The invention adopts the following technical scheme to solve the technical problems:
the application provides a distributed energy storage elevator control system. This distributed energy storage elevator control system includes: the device comprises a controller, a driving device and an energy storage device; the input end of the driving device is connected with a power grid, and the output end of the driving device is connected with a traction motor arranged on the elevator; the energy storage device is connected with the driving device, and the controller is respectively connected with the driving device and the energy storage device; the controller is used for controlling the driving device and the energy storage module connected with the controller according to the acquired information related to the running of the elevator; the driving device is used for driving a traction motor of the elevator according to the instruction information of the controller; the energy storage device is used for storing energy or supplying power to the driving device according to the instruction information of the controller.
Further, the driving device comprises a rectifying module and an inverting module, wherein an alternating current end of the rectifying module is connected with a power grid, a direct current end of the rectifying module is connected with a direct current end of the inverting module through a direct current bus, and an alternating current end of the inverting module is connected with the traction motor; the rectification module is used for rectifying alternating current from a power grid to obtain direct current; the inversion module is used for inverting and converting direct current input from the direct current end to obtain alternating current with set frequency.
Further, the energy storage device comprises a DC-DC module and an energy storage battery box, wherein two voltage conversion connection ends of the DC-DC module are respectively connected to the direct current bus and the energy storage battery box; the DC-DC module is a module for converting the voltage of direct current with different specification voltage values.
Furthermore, a bus supporting capacitor is arranged between the positive bus and the negative bus of the direct current bus.
Further, the distributed energy storage elevator control system further comprises an input filter, wherein the input end of the input filter is connected with the power grid, and the output end of the input filter is connected with the alternating current end of the rectifying module.
The distributed energy storage elevator control system further comprises a contactor, wherein the contactor is connected between the power grid and the input filter and used for connecting or disconnecting the power grid and the driving device according to the controller command, and when the contactor is connected, the contactor instructs the power grid to provide power for the driving equipment and the safety device according to the controller command and charges the energy storage battery box through the DC-DC module; when the contactor is switched off, the energy storage battery box supplies power to the inversion module and the rectification module through the DC-DC module and the DC bus according to the instruction of the main controller.
The application also provides a topological structure of the distributed energy storage elevator control system. The control system topological structure of the energy-saving elevator comprises: rectifier module, contravariant module and energy storage unit, wherein: the alternating current end of the rectification module is connected with a power grid, the direct current end of the rectification module is connected with the direct current end of the inversion module through a direct current bus, the alternating current end of the inversion module is connected with a traction motor of an elevator, and the energy storage unit is connected with the direct current bus.
Further, the energy storage unit comprises a DC-DC module and an energy storage battery box, and two conversion connection terminals of the DC-DC module are respectively connected to the DC bus and the energy storage battery box.
Further, the energy storage battery box obtains electricity from a direct current bus between the rectification module and the inversion module through the DC-DC module according to the instruction of the controller to charge the energy storage battery box, and the energy storage battery box supplies power to the rectification module and the inversion module through the DC-DC module according to the instruction of the controller to drive a traction motor and a safety device of the elevator.
According to the distributed energy storage elevator control system and the topological structure, when the power load is a wave valley according to the working mode operation time period preset by the controller, the battery box of the energy storage device is charged by the power grid; when the electric load is at a peak, the energy storage device supplies power to the elevator traction motor; the power grid electric energy is prevented from being used in the peak period and the high load period of the power utilization, and the peak clipping and valley filling functions on the user side are realized; when the lift car of the elevator is fully loaded and ascends or is unloaded and descends, the feedback electric energy of the traction motor of the elevator is charged to the energy storage battery box through the inversion module and the DC-DC module, and the battery box is charged to store the feedback electric energy, so that lossless energy feedback is realized. The regenerative electric energy consumed by the brake resistor in the traditional elevator control system is stored and then recycled, so that the energy loss of the elevator is reduced, and the energy is saved. Therefore, the peak clipping and valley filling at the elevator user side are realized, and the system cost and the land cost of centralized power station processing are reduced; the lossless energy feedback of the elevator is realized, and energy conservation and emission reduction are realized; the peak-valley electricity price difference of the load is effectively utilized, and the economic benefit maximization of elevator users is realized. Compare traditional elevator system, reduce parts such as braking resistance case, reduce elevator cost.
Drawings
Fig. 1 is a schematic diagram of a conventional configuration of an elevator control system;
fig. 2 is a schematic diagram of an exemplary architecture of an embodiment of a distributed energy storage elevator control system to which the present application applies;
fig. 3 is a schematic diagram of an exemplary further structure of an embodiment of a distributed energy storage elevator control system to which the present application applies;
fig. 4 is an exemplary system architecture diagram of the distributed energy storage elevator control system of the present application;
fig. 5 is an exemplary system architecture diagram of another implementation of the distributed energy storage elevator control system of the present application;
the power flow of the distributed energy storage elevator control system in the embodiment of fig. 6 is schematic in the energy storage period;
fig. 7 is a schematic diagram of the power flow direction of the distributed energy storage elevator control system in the power supply period in the embodiment;
fig. 8 is a schematic diagram of energy feedback power flow of the distributed energy storage elevator control system in the embodiment;
fig. 9 is a schematic view of an exemplary topology of an embodiment of a distributed energy storage elevator control system topology in the present application.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a common configuration of a current elevator control system. In the elevator control system as shown in fig. 1, the elevator wastes feedback energy in the form of heat energy through the brake resistor box during braking, and the elevator operation time period is mainly concentrated on the electricity utilization high period in the daytime, increasing the electricity utilization cost.
With continued reference to fig. 2, fig. 2 is a schematic diagram of an exemplary architecture of an embodiment of a distributed energy storage elevator control system to which the present application may be applied. As shown in fig. 2, the distributed energy storage elevator control system includes: the device comprises a controller, a driving device and an energy storage device; the input end of the driving device is connected with a power grid, and the output end of the driving device is connected with a traction motor (power equipment) of the elevator; the energy storage device is connected with the driving device, and the controller is respectively connected with the driving device and the energy storage device. The controller is used for controlling the driving device and the energy storage module connected with the controller according to the acquired information related to the running of the elevator; the driving device is used for driving a traction motor of the elevator according to the instruction information of the controller; the energy storage device is used for storing energy or supplying power to the driving device according to the instruction information of the controller.
Further, referring to fig. 3, an exemplary further structural schematic diagram of an embodiment of a distributed energy storage elevator control system to which the present application applies may be applied. The driving device comprises a rectification module and an inversion module, wherein the rectification module and the inversion module form frequency conversion equipment for driving the traction motor, the rectification module is connected with a power grid, and the inversion module is connected with power equipment of the elevator to realize frequency conversion for supplying power to the power grid.
Specifically, the alternating current end of the rectification module is connected with a power grid, the direct current end of the rectification module is connected with the direct current end of the inversion module through a direct current bus, and the alternating current end of the inversion module is connected with driving equipment of an elevator; the energy storage device is connected to a direct current bus between the rectification module and the inversion module.
The rectifier module and the inverter module are combined into frequency conversion equipment, and the frequency of the power supply provided by the power grid or the storage device is converted according to the instruction information of the controller.
The driving device is used for driving a traction motor of the elevator, and can be, for example, a traction motor for driving the elevator to vertically run, a traction synchronous motor or an asynchronous motor.
Specifically, the controller is used for controlling the operation of the elevator, so that the elevator can safely and normally operate. The controller also controls the energy storage device to store electric energy (charge) or supply power to the outside. The controller may be a master device that controls the starting, speed regulation, braking, and reversing of the motor by changing the wiring of the master circuit or control circuit and changing the resistance value in the circuit in a predetermined sequence. The computer system also can be an operating device which is composed of a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller and is used for coordinating and commanding the whole computer system. Specifically, the controller may be a control system having a microprocessor, such as a single chip microcomputer control system, a plc control system, or the like.
In the preset control logic of the controller, according to the general operation rule of an elevator control system, the operation logic of the elevator is divided according to time intervals, and the operation of the energy storage device is divided into a power supply time interval and an energy storage time interval. For example, the power supply period is set to 8 o 'clock early to 10 o' clock late, and the energy storage period is set to 10 o 'clock late to 8 o' clock early. And in the power supply period, the energy storage device supplies power to the distributed energy storage elevator control system, and in the energy storage period, the power grid charges the energy storage device and stores the electric energy.
In this embodiment, the controller controls the rectifying module, the inverting module, and the energy storage device connected to the controller according to the acquired information related to the operation of the elevator. Wherein, the information related to the operation of the elevator can be: the control logic information preset by the elevator, the outbound information of the elevator, the door opening and closing information of the elevator, the running floor information of the elevator and the like.
And communication links are provided among the controller, the rectifying module, the inverting module and the energy storage device through a network. Information can be transmitted among the controller, the rectifying module, the inverting module and the energy storage device in a wired or wireless communication link or an optical fiber cable or the like so as to realize control of the elevator.
Continuing to refer to fig. 4, by way of example, fig. 4 is an exemplary system architecture diagram of the distributed energy storage elevator control system of the present application. As shown in fig. 4, in an implementation manner of this embodiment, the rectifying module is a controllable rectifying module, and the controllable rectifying module may rectify an alternating current at an alternating current end into a direct current, and may also reversely rectify the direct current at a direct current end into an alternating current. The controllable rectifying module is used for rectifying alternating current from a power grid to obtain direct current; the inversion module is used for inverting and converting direct current input from the direct current end to obtain alternating current with set frequency; the direct current input by the direct current end of the inversion module can be direct current obtained by rectifying alternating current provided by the power grid by the controllable rectification module, and can also be direct current provided by the energy storage module. It can be understood that the controllable rectification module and the inversion module can form a frequency conversion device for frequency conversion of a power supply provided by a power grid and supply alternating current after frequency conversion to an elevator traction motor. The energy storage device is used for providing power for the traction motor and the safety device of the elevator in a set time period. The energy storage module can also be used as an emergency power supply. The safety device can be a safety device related to the safe operation of the elevator, such as an elevator safety loop, a door lock device, a door machine, a band-type brake and the like.
In this embodiment, the controllable rectifying module and the inverting module are connected by a dc bus, that is, the dc bus connects the output terminal of the controllable rectifying module and the input terminal of the inverting module. Therefore, alternating current provided by the power grid is rectified by the controllable rectifying module to output direct current, the direct current is input to the direct current input end of the inversion module through the direct current bus, and alternating current with preset frequency or controller specified frequency is obtained after inversion is carried out by the inversion module. It should be noted that the controllable rectifier module can perform inverse transformation on the power supply, that is, the controllable rectifier module can invert the direct current at the direct current end into the alternating current to output the alternating current through the alternating current end when a set condition is met. And a bus supporting capacitor is arranged between the direct current buses. The bus support capacitor is used for stabilizing bus voltage between the direct current buses.
Further, in this embodiment, the energy storage device includes an energy storage battery box and a DC-DC module, and a voltage conversion connection terminal of the DC-DC module is connected to the energy storage battery box and the DC bus, respectively. Here, DC is an abbreviation for Direct Current, and represents Direct Current; the DC-DC module is a device or apparatus for converting the voltage of the direct current with different voltage amplitudes.
The system also comprises an input filter, wherein the input end of the input filter is connected with a power grid, and the filtering output end of the input filter is connected with the alternating current end of the controllable rectifying module. Here, the input filter mainly functions to remove harmonics in the frequency converter.
The distributed energy storage elevator control system further comprises a contactor, wherein the contactor is arranged between the power grid and the filter and used for breaking the connection between the frequency conversion device and the power grid. And in the energy storage period of the energy storage device, the contactor is closed, the power grid supplies power to the whole frequency conversion device and charges a battery box in the energy storage unit, and in the power supply period of the energy storage device, the contactor disconnects the power grid from the frequency conversion device and simultaneously disconnects a power supply loop of the energy storage device from the power grid.
In this embodiment, in the energy storage period of the energy storage device, when the power grid supplies power to the energy storage module, the DC power obtained after rectification by the controllable rectification module is applied to the battery box of the energy storage device through the DC-DC module; and in the power supply period of the energy storage device, the energy storage battery box supplies power to the inversion module and the controllable rectification module through the DC-DC module and the direct current bus. When the energy storage battery box is charged through the DC-DC module, the DC-DC unit can convert the direct current on the direct current bus into direct current matched with the voltage of the energy storage battery box; when the energy storage battery box supplies power to the direct current bus, the DC-DC module performs voltage conversion on the direct current output by the energy storage battery box, and converts the direct current with fixed voltage provided by the energy storage battery box into the direct current with a preset voltage value.
Continuing to refer to fig. 5, by way of example, fig. 5 is an exemplary system architecture diagram of another implementation of the distributed energy storage elevator control system of the present application. As shown in fig. 5, in another implementation manner of this embodiment, the rectifying module is an uncontrollable rectifying module, and the uncontrollable rectifying module is configured to rectify an ac power from a power grid to obtain a dc power, and is not possible to perform inverse rectification. The controllable rectification module and the inversion module can form a frequency conversion device for carrying out frequency conversion on a power supply provided by a power grid and providing alternating current after the frequency conversion for the elevator traction motor.
The energy storage device comprises a DC-DC module, a DC-AC module and an energy storage battery box, wherein the voltage conversion connecting end of the DC-DC module is respectively connected with the energy storage battery box and a direct current bus. The DC-DC module is a device or equipment for converting the voltage of direct current with different voltage amplitudes. The DC end of the voltage conversion of the DC-AC module is connected with the energy storage battery box, and the AC end of the voltage conversion is connected with the power supply end of the safety loop, wherein the DC-AC module is a module for converting DC into AC.
When the power grid charges the energy storage device, the uncontrollable rectifying module provides direct current obtained by rectifying the set alternating current to the power grid, and the energy storage battery box of the energy storage device is charged through the DC-DC module. When the energy storage device supplies power to the traction machine and the safety loop, the energy storage battery box supplies power to the inversion module through the DC-DC module so as to drive the traction machine; meanwhile, the energy storage battery box converts direct current provided by the energy storage battery box into alternating current through the DC-AC module and then supplies power to a safety device of an elevator control system, such as a door machine, a brake, a safety loop and the like.
As an example, referring to fig. 6, fig. 6 shows a schematic diagram of the power flow direction of the distributed energy storage elevator control system in the energy storage period in the present embodiment. As shown in fig. 6, in the energy storage period, the power grid supplies power to the whole system when the power load of the power grid is in the trough period, one part of the alternating current provided by the power grid supplies power to the elevator traction machine, the door motor, the band-type brake and the safety loop, and the second part of the alternating current is converted by the conversion device and supplies power to the energy storage module to charge the energy storage battery box. The method specifically comprises the following steps: the power supply of the power grid is rectified by the controllable rectifying module to obtain direct current, and the DC-DC unit connected to the direct current bus converts the voltage and charges the energy storage battery box, as shown by a dotted arrow in fig. 6.
Referring to fig. 7, fig. 7 shows a schematic diagram of the power flow of the distributed energy storage elevator control system in the power supply period in the embodiment. As shown in fig. 7, in the electric mode when the power load of the power grid is in a peak period, the car is fully loaded and ascended or unloaded and descends, and the consumed power of the motor is provided by the energy storage module, i.e. the energy storage battery box provides power through the DC-DC module. The current flow direction of the energy storage battery box serving as an energy storage unit is specifically that the energy storage battery box is connected to a direct current bus through a DC-DC module, and direct current of the direct current bus supplies power to an elevator traction motor after being inverted and converted through an inversion module, as shown by a dotted arrow in fig. 7.
Further, referring to fig. 8, fig. 8 shows a schematic diagram of energy feedback power flow of the distributed energy storage elevator control system in this embodiment. As shown in fig. 8, when the car of the elevator is fully loaded and goes up or is unloaded and goes down, the energy-saving control system of the elevator is in a feedback mode, and the feedback electric energy of the traction motor of the elevator is charged to the battery box through the inverter module and the DC-DC module, so that the feedback of energy is not damaged. The energy storage device block stores and reuses feedback electric energy consumed by the brake resistor through heating in the traditional elevator control system, as shown by a dotted arrow in fig. 8.
Further, in the energy storage device, a battery box is arranged in a counterweight of the elevator to serve as a battery counterweight, and the battery counterweight is connected with the DC-DC module through a traveling cable. Here, set up above-mentioned energy storage battery box in the elevator counter weight, can reduce the space that energy storage battery box took up.
At the energy storage time interval, the power grid supplies power to the frequency conversion device to drive the traction motor, and meanwhile, the battery box of the energy storage device is charged to store electric energy; and when the energy storage device is in the power supply time interval, the energy storage device supplies power to the elevator driving device, the power supply door motor, the band-type brake and the safety loop.
Compared with the prior art, the distributed energy storage elevator control system has the following technical effects:
the charging and discharging capacity of the energy storage device is fully utilized, and when the power load is a wave valley, the battery box of the energy storage device is charged by the power grid; when the electric load is at a peak, the energy storage device supplies power to the elevator traction motor; the power grid electric energy is prevented from being used in the peak period and the high load period of the power utilization, and the peak clipping and valley filling functions on the user side are achieved.
The battery box in the energy storage device is connected to a direct current bus between the controllable rectifying module and the inversion module through the DC-DC conversion unit without AC-DC conversion, so that the complexity of the system is reduced.
The energy storage device can be used as an emergency power supply, and the battery box of the energy storage device can be directly used for supplying power when the power grid fails, so that the emergency power supply and the accessory equipment thereof are reduced.
On the other hand, the invention also provides a topological structure of the distributed energy storage elevator control system. Referring to fig. 9, fig. 9 shows an exemplary topology schematic of an embodiment of a distributed energy storage elevator control system topology, as shown in fig. 9, comprising: the energy storage device comprises a rectification module, an inversion module and an energy storage unit; the topological structure of the distributed energy storage elevator control system is as follows:
the alternating current end of the rectifying module is connected with a power grid, the direct current end of the rectifying module is connected with the direct current end of the inverting module through a direct current bus, the alternating current end of the inverting module is connected with a traction motor of driving equipment of an elevator, and the energy storage unit is connected with the direct current bus.
In this embodiment, the rectifying module may be a controllable rectifying module or an uncontrollable rectifying module.
Furthermore, the rectifying module is a controllable rectifying module, the energy storage unit comprises a DC-DC module and an energy storage battery box, and two conversion connection ends of the DC-DC module are respectively connected to the DC bus and the energy storage battery box. The rectifying module is an uncontrollable rectifying module, the energy storage unit comprises a DC-DC module, a DC-AC module and an energy storage battery box, two conversion connecting ends of the DC-DC module are respectively connected to the direct current bus and the energy storage battery box, a direct current end of the DC-AC module is connected to the energy storage battery box, and an alternating current end of the DC-AC module is connected to the door machine, the band-type brake and the safety loop.
When the power supply load of the power grid is in a trough, the power grid supplies power to a traction motor, and meanwhile, the energy storage battery box obtains power from a direct current bus between the rectification module and the inversion module through a DC-DC module and charges the energy storage battery box; when the power supply load of the power grid is in a trough, the power grid stops supplying power to the traction motor, and the energy storage battery box supplies power to the controllable rectification module and the inversion module through the DC-DC module so as to drive the traction motor of the elevator.
When the rectifier module is a controllable rectifier module and the power grid stops supplying power to the traction motor, the energy storage battery box also supplies power to the direct current end of the rectifier module through the DC-DC module and supplies power to the safety device of the elevator after the inversion operation of the rectifier module, wherein the safety device comprises a door machine, a brake and a safety loop.
When the rectifying module is an uncontrollable rectifying module and the power grid stops supplying power to the traction motor, the DC-AC module converts the direct current provided by the energy storage battery box into alternating current to supply power to a safety device of the elevator, wherein the safety device comprises a door machine, a band-type brake and a safety loop.
In this embodiment, the controllable rectifying module and the inverting module may form a frequency conversion device. In the topology structure of the distributed energy storage elevator control system, the energy storage module is connected with the direct current bus which is connected with the direct current ends of the controllable rectification module and the inversion module.
Compared with the prior art, the distributed energy storage elevator control system topological structure has the following technical effects:
when the power load is a wave valley, the battery box of the energy storage device is charged by the power grid; when the electric load is at a peak, the energy storage device supplies power to the elevator traction motor; the power grid electric energy is prevented from being used in the peak period and the high load period of the power utilization, and the peak clipping and valley filling functions on the user side are realized;
the energy storage device is directly connected to a direct current bus between the controllable rectifying module and the inverting module, and an AC-DC conversion device is not required to be arranged for alternating current-direct current conversion;
the energy storage device can directly replace an emergency power supply device in the existing system, when a power grid fails, direct current in the energy storage battery box is directly transmitted to a direct current bus after being subjected to voltage conversion by the DC-DC module, and the direct current supplies power to a driving device, a door motor, a brake and a safety loop of the elevator through the inverter module and the controllable rectifier module; the DC-AC conversion device is not required to be arranged for converting the direct current into the alternating current.
Therefore, in the distributed energy storage elevator control system topological structure, the peak clipping and valley filling of the elevator user side are realized, and the system cost and the land cost of the centralized processing of the national power station are reduced; the lossless energy feedback of the elevator is realized, and energy conservation and emission reduction are realized; the electricity price difference between the load peak and the load valley is effectively utilized, and the economic benefit maximization of an elevator user is realized; and parts such as a brake resistance box in the elevator system are reduced.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A distributed energy storage elevator control system, the system comprising: the device comprises a controller, a driving device and an energy storage device; the input end of the driving device is connected with a power grid, and the output end of the driving device is connected with a traction motor arranged on the elevator; the energy storage device is connected with the driving device, and the controller is respectively connected with the driving device and the energy storage device; wherein,
the controller is used for controlling the driving device and the energy storage module connected with the controller according to the acquired information related to the operation of the elevator;
the driving device is used for driving a traction motor of the elevator according to the instruction information of the controller;
the energy storage device is used for storing energy or supplying power to the driving device according to the instruction information of the controller.
2. The distributed energy storage elevator control system according to claim 1, wherein the driving apparatus comprises a rectification module and an inversion module, wherein an ac terminal of the rectification module is connected to a power grid, a dc terminal of the rectification module is connected to a dc terminal of the inversion module through a dc bus, and an ac terminal of the inversion module is connected to the traction motor;
the rectification module is used for rectifying alternating current from a power grid to obtain direct current;
the inversion module is used for inverting and converting direct current input from the direct current end to obtain alternating current with set frequency.
3. The distributed energy storage elevator control system of claim 2, wherein the energy storage device comprises a DC-DC module and an energy storage battery box, two voltage conversion connections of the DC-DC module being connected to the DC bus and the energy storage battery box, respectively; the DC-DC module is a module for converting the voltage of direct current with different specification voltage values.
4. The distributed energy storage elevator control system of claim 2, wherein a bus support capacitor is disposed between positive and negative buses of the dc bus.
5. The distributed energy storage elevator control system of claim 2, further comprising an input filter having an input connected to the grid and an output connected to the ac terminal of the rectifier module.
6. The distributed energy storage elevator control system of claim 5, further comprising a contactor connected between the grid and the input filter for making or breaking an electrical connection between the grid and the drive device according to the controller command, the contactor being turned on to instruct the grid to power the drive apparatus, the safety device, and to charge the energy storage battery box through the DC-DC module; when the contactor is disconnected, the energy storage battery box supplies power to the inversion module and the controllable rectification module through the DC-DC module and the DC bus according to the instruction of the main controller.
7. A distributed energy storage elevator control system topology, characterized in that the energy saving elevator control system topology comprises: rectifier module, contravariant module and energy storage unit, wherein:
the alternating current end of the rectification module is connected with a power grid, the direct current end of the rectification module is connected with the direct current end of the inversion module through a direct current bus, the alternating current end of the inversion module is connected with a traction motor of an elevator, and the energy storage unit is connected with the direct current bus.
8. The distributed energy storage elevator control system topology of claim 7, wherein the energy storage unit comprises a DC-DC module and an energy storage battery box, two switching connections of the DC-DC module being connected to the DC bus and the energy storage battery box, respectively.
9. The distributed energy storage elevator control system topology of claim 8, wherein the energy storage battery box is instructed by the controller instructions to take power from a DC bus between the rectification module and the inversion module via a DC-DC module to charge the energy storage battery box, and wherein the energy storage battery box is instructed by the controller instructions to supply power to the controllable rectification module and the inversion module via the DC-DC module to drive a traction motor and a safety device of an elevator.
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