Elevator energy-saving control system based on auxiliary power supply module

Abstract

The invention discloses an elevator energy-saving control system based on an auxiliary power supply module, which relates to the field of elevator energy-saving control and comprises a battery module, the auxiliary power supply module and an energy-saving control module, the battery module is connected with a circuit breaker, the circuit breaker is connected with at least one contactor set used for being connected with at least one elevator in a one-to-one correspondence mode, the same bypass contactor is connected between the circuit breaker and all the contactor sets, and the bypass contactor is connected with an anti-reverse diode in parallel. The mains supply and the battery module are respectively connected with the auxiliary power supply module; the auxiliary power supply module is connected with the energy-saving control module; and the energy-saving control module is respectively in communication connection with the circuit breaker, the contactor group, the bypass contactor, the battery module and the auxiliary power supply module. The charging and discharging energy balance of the battery module can be realized, and the problems of conversion electric quantity loss and high cost caused by the use of a conversion module are avoided.

Description

Technical Field

[0001] This invention relates to the field of elevator energy-saving control technology, and in particular to an elevator energy-saving control system based on an auxiliary power supply module. Background Technology

[0002] Currently, elevators are primarily powered by mains electricity. When the mains power fails, the elevator cannot operate. Although some elevators are equipped with battery modules and use converter modules to charge them, these converter modules suffer from issues such as power loss during conversion and high cost. Summary of the Invention

[0003] To address the technical problems existing in the background art, the present invention proposes an elevator energy-saving control system based on an auxiliary power supply module.

[0004] This invention proposes an elevator energy-saving control system based on an auxiliary power supply module, comprising: a battery module, an auxiliary power supply module, and an energy-saving control module; the battery module is connected to a circuit breaker, the circuit breaker is connected to at least one contactor group for one-to-one connection with at least one elevator, the circuit breaker and all contactor groups are connected to the same bypass contactor, and the bypass contactor is connected in parallel with an anti-reverse diode; the mains power and the battery module are respectively connected to the auxiliary power supply module, the auxiliary power supply module is connected to the energy-saving control module; the energy-saving control module is communicatively connected to the circuit breaker, contactor group, bypass contactor, battery module, and auxiliary power supply module.

[0005] Preferably, the battery module powers the auxiliary power supply module and the elevator; the auxiliary power supply module powers the energy-saving control module and also controls the switching of its power input between mains power and the battery module; the circuit breaker controls the closing and opening of the circuit between the power supply module and all elevators; the contactor group controls the closing and opening of the circuit between the circuit breaker and a specific elevator; the bypass contactor controls the closing and opening of the positive terminal of the circuit breaker's output and the positive terminal of the input of all contactor groups; and the anti-reverse diode is used to charge the battery module using the regenerative energy generated by the elevator's ascent or descent.

[0006] The energy-saving control module is used to acquire mains power information and battery module power information, and control the coordinated operation of the battery module, circuit breaker, bypass contactor, at least one contactor group and auxiliary power supply module to achieve energy-saving power consumption of at least one elevator based on the mains power information and battery module power information.

[0007] Preferably, during normal elevator operation, the energy-saving control module controls the circuit breaker and each contactor group to close, and obtains the elevator's status information and the battery module's power information; and controls the battery module, bypass contactor and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator.

[0008] Preferably, the elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators R generating regenerative power, and the number of elevators S using electricity.

[0009] During the operation, the energy-saving control module calculates the total regenerative energy Q generated by elevator R based on the elevator's status information. R And the total energy consumption Q of elevator S s The rechargeable capacity Q of the battery module is calculated based on the battery module's power information. 充max and discharge capacity Q 放max ;

[0010] If Q R Q s And Q R -Q s Q 充max Then, the control battery module receives power to Q. 充max The contactor group corresponding to the elevator in section R is disconnected at that time.

[0011] If Q R s And Q s -Q R Q 放max Then, the control battery module discharges to the elevator to Q. 放max The contactor group corresponding to the elevator in section R is disconnected at that time.

[0012] If Q R =Q s Then, the battery module will not be charged or discharged between itself and the elevator.

[0013] ​Preferably, when the elevator is running normally, if the mains power fails and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker, bypass contactor and at least one contactor group to be in the closed state, controlling the battery module and the contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module;

[0014] When the mains power fails and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker and at least one contactor group to be in the closed state and the bypass contactor to be open, so as to control the battery module to receive the regenerative energy generated by the elevator rising or falling; wherein, the first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0015] Preferably, when all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to disconnect.

[0016] Preferably, when there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and starts the system hibernation mode.

[0017] The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, and the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

[0018] The first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0019] Preferably, when the mains power fails, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery management system in the battery module to shut down and start the system hibernation mode.

[0020] The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, and the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

[0021] The first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0022] Preferably, after the system hibernation mode is activated, the energy-saving control module automatically wakes up every T time interval to detect whether the battery module meets the second preset condition; if the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode; wherein, the second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity threshold, the total voltage of the battery module is greater than the high voltage threshold of the battery module, or the SOC of the battery module is greater than the high capacity threshold of the battery module.

[0023] Preferably, after the system hibernation mode is activated, the energy-saving control module automatically wakes up every T time interval to detect whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the exit of the system hibernation mode, controls the circuit breaker, bypass contactor and each contactor group to close, and controls the battery management system of the battery module to operate normally. It controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0024] Preferably, while controlling the battery module to maintain its operating mode, the energy-saving control module also detects whether the elevator has resumed operation; if the elevator resumes operation, the energy-saving control module controls the circuit breaker, bypass contactor and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0025] Preferably, when the elevator is running normally and there is mains power, the energy-saving control module controls the operation of the auxiliary power supply module so that the auxiliary power supply module switches its power input to mains power or battery module.

[0026] Preferably, when the elevator is running normally, if there is mains power and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to mains power, and controls the circuit breaker and each contactor group to close and the bypass contactor to open, so as to use the regenerative energy generated by the elevator rising or falling to charge the battery module; wherein, the first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0027] When the regenerative energy generated by the elevator's ascent or descent is used to charge the battery module until the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input from the mains power to the battery module. It also controls the circuit breaker, each contactor group, and the bypass contactor to close, and controls the battery module and the contactor group to cooperate so that the battery module supplies power to the elevator or receives the regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges. The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell's voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell's capacity threshold, the total voltage of the battery module is greater than the battery module's high voltage threshold, or the battery module's SOC is greater than the battery module's high capacity threshold.

[0028] Preferably, the battery module includes Y battery packs connected in parallel, and each battery pack includes X cells connected in series.

[0029] The battery module needs to meet the condition Q. Bsum =Q C备sum +Q C耗sum In the formula, Q Bsum Q represents the maximum capacity of the battery module. C备sum This represents the amount of electricity required for all elevators to operate normally during the longest historical power outage in the local area; Q C耗sum This indicates the electricity required for all elevators to operate normally during non-minimum electricity price periods on that day;

[0030] Among them, Q Bsum =(C B额 ×X)×Y; where C B额 This indicates the rated capacity of each battery cell;

[0031] in, In the formula, T 市停P indicates the longest recorded power outage in the local area. CMAXi Let N represent the maximum power of the i-th elevator, and N represent the number of elevators, i = 1, 2, ..., N;

[0032] in, In the formula, T 非低 This indicates the duration of the non-minimum electricity price period on that day.

[0033] Preferably, the auxiliary power supply module is connected to the mains power supply via a first energy sampling module, the battery module is connected to the circuit breaker via a third energy sampling module, each contactor group is connected to the corresponding elevator via a second energy sampling module, and each elevator is connected to the mains power via a fourth energy sampling module; the first, second, third, and fourth energy sampling modules are respectively connected to the energy-saving control module for communication.

[0034] Preferably, the first power sampling module is used to acquire first power consumption information of the mains power supply to the auxiliary power supply module; the third power sampling module is used to acquire third power consumption information of the battery module discharging or fourth power consumption information of the battery module charging; the fourth power sampling module is used to acquire fifth power consumption information of the mains power supply to each elevator; the second power sampling module is used to acquire sixth power consumption information of the battery module supplying power to each elevator or second power consumption information of each elevator discharging to the battery module; and the energy-saving control module is used to calculate the total power saving based on the first, second, third, fourth, fifth, and sixth power consumption information.

[0035] Preferably, the total power saved is

[0036] In the formula, ΔQ represents the total amount of electricity, and Q PA Q represents the amount of electricity in the first electricity consumption information. PE放 Q represents the amount of electricity in the third-party electricity consumption information. PE充 Q represents the amount of electricity in the fourth electricity consumption information. PCj This represents the electricity consumption in the fifth electricity consumption information, where N is the number of elevators, j = 1 to N, i = 1 to N, and Q Pi放 Q represents the amount of electricity in the sixth electricity consumption information. Pi充 This indicates the amount of electricity used in the second electricity consumption information.

[0037] Preferably, each power consumption information also includes current, frequency, and power; when both the first power consumption information and the fifth power consumption information meet the preset power outage conditions, the current mains power is in a power outage state.

[0038] Among them, the preset conditions for power outage are: current < mains stable current threshold and duration > mains stable duration threshold, voltage < mains stable voltage threshold and duration > mains stable duration threshold, frequency < mains stable frequency threshold and duration > mains stable duration threshold, or power < mains stable power threshold and duration > mains stable duration threshold.

[0039] In practical implementation, the battery module is used to power the auxiliary power supply module and the elevators; the auxiliary power supply module is used to power the energy-saving control module, and also controls the switching of its power input between the mains power and the battery module; the circuit breaker is used to control the closing and opening of the circuit between the power supply module and all elevators; the contactor group is used to control the closing and opening of the circuit between the circuit breaker and a specific elevator; the bypass contactor is used to control the closing and opening of the positive terminal of the circuit breaker output and the positive terminal of the input of all contactor groups; the energy-saving control module is used to acquire mains power information and battery module power information, and controls the coordinated operation of the battery module, circuit breaker, bypass contactor, at least one contactor group, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator based on the mains power information and battery module power information.

[0040] The proposed elevator energy-saving control system based on an auxiliary power supply module uses a battery module to power the energy-saving control module while also automatically supplying power to each elevator or receiving regenerative energy generated during elevator ascent or descent, ensuring stable elevator operation during mains power outages. Furthermore, independent control of each elevator is achieved through the cooperation of a circuit breaker and at least one contactor group. In addition, the combination of a bypass contactor and a reverse protection diode enables energy balance in the battery module's charging and discharging, avoiding the energy loss and high cost associated with using a converter module. It also avoids the problem of the battery module being chronically undercharged or low-charged when the mains power is available but the auxiliary power supply module cannot be continuously charged. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of an elevator energy-saving control system based on an auxiliary power supply module in one embodiment of the present invention. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Reference Figure 1The present invention proposes an elevator energy-saving control system based on an auxiliary power supply module, comprising: a battery module, an auxiliary power supply module, an energy-saving control module, a circuit breaker, at least one contactor group, and at least one fuse group;

[0044] The electrode connection terminals of the battery module are connected to the input terminals of the circuit breaker, and the output terminals of the circuit breaker are respectively connected to the input terminals of at least one contactor group. The output terminals of at least one contactor group are used to connect to the connection terminals of at least one elevator in a one-to-one correspondence. The positive terminal of the output terminal of the circuit breaker is connected to the positive terminal of the input terminals of all contactor groups, and the two ends of the bypass contactor are connected to an anti-reverse diode.

[0045] The input terminal of the auxiliary power supply module is connected to the electrode connection terminals of the mains power and battery module respectively, and the output terminal of the auxiliary power supply module is connected to the power supply terminal of the energy-saving control module. The energy-saving control module is communicatively connected to the circuit breaker, contactor group, bypass contactor, battery module and auxiliary power supply module respectively.

[0046] In practical implementation, the battery module is used to power the auxiliary power supply module and the elevator; the auxiliary power supply module is used to power the energy-saving control module, and also controls the switching of its power input between the mains power and the battery module; the circuit breaker is used to control the closing and opening of the circuit between the power supply module and all elevators; the contactor group is used to control the closing and opening of the circuit between the circuit breaker and a specific elevator; the bypass contactor is used to control the closing and opening of the positive terminal of the circuit breaker output and the positive terminal of the input of all contactor groups; the anti-reverse diode is used to charge the battery module using the regenerative energy generated by the elevator rising or falling; the energy-saving control module is used to acquire mains power information and battery module power information, and controls the coordinated operation of the battery module, circuit breaker, bypass contactor, at least one contactor group, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator based on the mains power information and battery module power information.

[0047] This invention uses battery modules to power the energy-saving control module while also automatically supplying power to each elevator or receiving regenerative energy generated during elevator ascent or descent. This saves energy while ensuring stable elevator operation during mains power outages. Furthermore, independent control of each elevator is achieved through the cooperation of circuit breakers and at least one contactor group. In addition, the cooperation of bypass contactors and anti-reverse diodes enables the balance of charging and discharging energy of the battery modules, avoiding the problems of power loss and high cost caused by using conversion modules. It also avoids the problem of battery modules being chronically undercharged or low-charged when the mains power is available and the auxiliary power supply module cannot be continuously charged.

[0048] Specifically, the energy-saving control module controls and detects the circuit breaker, contactor group, and bypass contactor through dry contacts; the energy-saving control module communicates with the battery module through CAN or daisy chain; the energy-saving control module controls and detects the auxiliary power supply module through dry contacts, or it can also communicate through CAN, RS485, or Ethernet ports.

[0049] In this embodiment, each contactor group is connected to a corresponding elevator group with a fuse group to improve electrical safety.

[0050] During normal elevator operation, the energy-saving control module controls the circuit breaker, bypass contactor, and various contactor groups to close, and obtains the elevator's status information and the battery module's power information; and controls the battery module and contactor groups to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator.

[0051] The elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators R generating regenerative power, and the number of elevators S using electricity.

[0052] During the operation, the energy-saving control module calculates the total regenerative energy Q generated by elevator R based on the elevator's status information. R And the total energy consumption Q of elevator S s The rechargeable capacity Q of the battery module is calculated based on the battery module's power information. 充max and discharge capacity Q 放max ;

[0053] If Q R Q s And Q R -Q s Q 充max Then, the control battery module receives power to Q. 充max The contactor group corresponding to the elevator in section R is disconnected at that time.

[0054] If Q R s And Q s -Q R Q 放max Then, the control battery module discharges to the elevator to Q. 放max The contactor group corresponding to the elevator in section R is disconnected at that time.

[0055] If Q R =Q s Then, the battery module will not be charged or discharged between itself and the elevator.

[0056] ​In one specific embodiment, there are three elevators, namely Elevator 1, 2, and 3. Among them, the operating states of the three elevators are as follows: Elevator 1 is in a stopped and non-operating state with a power quantity Q1 = 0. At the same time, Elevator 2 is in a heavy-load downward movement generating regenerative energy Q2, and Elevator 3 is in a heavy-load upward movement requiring a power consumption of Q3. Then, the energy-saving control module controls the contactor on Elevator 1 to disconnect, neither charging nor discharging Elevator 1; and controls the contactors of Elevator 2 and 3 to be in a closed state. Among them, the chargeable quantity Q of the battery module 充max =(SOC Bth High - SOC)*Q rated capacity, Q 放max =(SOC - SOC Bth低 )*Q rated capacity, where SOC Bth低 is the low threshold of the battery module capacity;

[0057] When Q2 > Q3 and Q2 - Q3 > Q 充max , then the energy-saving control module controls the battery module to charge and controls the contactor on Elevator 2 to disconnect when the power quantity reaches Q charge max;

[0058] When Q2 < Q3 and Q3 - Q2 > Q 放max , then the energy-saving control module controls the battery module to discharge and controls the contactor on Elevator 2 to disconnect when the power quantity reaches Q 放max .

[0059] In another specific embodiment, there are three elevators, namely Elevator 1, Elevator 2, and Elevator 3. Among them, the operating states are that Elevator 1 and Elevator 2 are in heavy-load downward movement and respectively generate regenerative energies Q1 and Q2, and Elevator 3 is in heavy-load upward movement requiring a power consumption of Q3. Then, control the contactors of Elevator 2 and 3 to be in a closed state. Among them, the chargeable quantity Q of the battery module 充max =(SOC Bth高 - SOC)*Q rated capacity, the dischargeable quantity Q 放max =(SOC - SOC Bth低 )*Q rated capacity;

[0060] When Q1 + Q2 > Q3 and Q1 + Q2 - Q3 > Q 充max , then the energy-saving control module monitors that the charging power quantity of the battery module reaches Q 充max , and then controls the contactors on Elevator 1 and Elevator 2 to disconnect;

[0061] When Q1 + Q2 < Q3 and Q3 - (Q1 + Q2) > Q 放max , then the energy-saving control module monitors that the discharging power quantity of the battery module reaches Q 放max , and then controls the contactors on Elevator 1 and Elevator 2 to disconnect.

[0062] With this configuration, this embodiment can fully utilize the regenerative energy generated by elevator R to power elevator S, effectively saving energy.

[0063] When the elevator is operating normally, and the elevator is powered only by mains power and the elevator energy-saving control system based on the auxiliary power supply module, in this embodiment, when the mains power fails, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker, bypass contactor, and at least one contactor group to be in the closed state. The battery module and contactor group work together to allow the battery module to supply power to the elevator, receive regenerative energy generated by the elevator's ascent or descent, or operate without charging or discharging. If the battery module discharges to the point where a third preset condition is met, the circuit breaker, bypass contactor, and at least one contactor group are then disconnected until mains power is restored or the battery in the battery module is replaced.

[0064] With this configuration, this embodiment can use the battery module to power the energy-saving control module while also automatically powering the elevator or automatically receiving regenerative energy generated by the elevator's ascent or descent, thus ensuring the stable operation of the elevator during mains power outages.

[0065] In the case where the elevator has an additional backup power supply in addition to the mains power and the energy-saving elevator control system, in order to ensure the stable operation of the energy-saving elevator control system, in this embodiment, when the elevator is running normally, if the mains power fails and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker, bypass contactor and at least one contactor group to be in the closed state, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module;

[0066] When the mains power fails and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker and at least one contactor group to be in the closed state and the bypass contactor to be open, so as to control the battery module to receive the regenerative energy generated by the elevator rising or falling; wherein, the first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0067] In a further embodiment, when all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to disconnect to ensure electrical safety.

[0068] In a further embodiment, when there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode so that the battery module supplies power to the energy-saving control module; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and starts the system hibernation mode to avoid the battery module from running out of power.

[0069] In a further embodiment, when the mains power fails, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery module to maintain its working mode so that the battery module supplies power to the energy-saving control module; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module, controls the battery management system in the battery module to shut down, and starts the system hibernation mode to reduce energy consumption so as to avoid the battery module from running out of power.

[0070] In a further embodiment, after the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the battery module meets the second preset condition; if the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode so as to supply power to the energy-saving control module in a timely manner after the battery module is replaced.

[0071] In a further embodiment, after the system sleep mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the exit of the system sleep mode, and controls the circuit breaker, bypass contactor, and each contactor group to close. It also controls the battery management system of the battery module to operate normally, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator. With this configuration, the normal operation of the entire elevator energy-saving control system can be restored after the elevator resumes operation.

[0072] In a further embodiment, while controlling the battery module to maintain its operating mode, the energy-saving control module also detects whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to close, and controls the battery module and contactor groups to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or operates without charging or discharging. This configuration allows the entire elevator energy-saving control system to resume normal operation after the elevator resumes operation.

[0073] The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module, and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

[0074] The first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0075] The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity threshold, the total voltage of the battery module is greater than the high voltage threshold of the battery module, or the SOC of the battery module is greater than the high capacity threshold of the battery module.

[0076] This embodiment can ensure that the subsequent elevator energy system can operate stably and reliably, and ensure electrical safety during elevator maintenance. Moreover, by setting the first and second conditions, frequent opening and closing of the contactor group can be avoided.

[0077] When the elevator is running normally, if there is mains power, the energy-saving control module controls the auxiliary power supply module to switch its power input to mains power or battery power.

[0078] To avoid the problems of power loss and high cost caused by the conversion module, the battery module's charging and discharging energy balance can be achieved through the cooperation of bypass contactors and anti-reverse diodes. In one specific embodiment, when the mains power is available and the battery module meets a first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to mains power, and controls the circuit breaker and each contactor group to close and the bypass contactor to open, so as to use the regenerative energy generated by the elevator's ascent or descent to charge the battery module; wherein, the first preset condition is that the voltage V of any single cell in the battery module is less than the single cell undervoltage threshold V. th欠, the SOC of any single battery cell in the battery module < the low threshold SOC of the single battery cell capacity th低 , the total voltage V of the battery module B < the low voltage threshold V of the battery module BTH低 or the SOC of the battery module < the low threshold SOC of the battery module capacity Bth低 ;

[0079] When the regenerative energy generated by the elevator ascending or descending is used to charge the battery module until the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to act, so as to switch its power input from the mains power to the battery module, and controls the circuit breaker, each contactor group and the bypass contactor to be closed, and controls the cooperation between the battery module and the contactor group so that the battery module supplies power to the elevator or receives the regenerative energy generated by the elevator ascending or descending or neither charges nor discharges; wherein, the second preset condition is that the voltage V of any single battery cell in the battery module > the regulated voltage threshold V of the single battery cell th稳 , the capacity SOC of any single battery cell in the battery module > the capacity threshold SOC of the single battery cell th高 , the total voltage V of the battery module B > the high voltage threshold V of the battery module BTH高 or the capacity SOC of the battery module > the high threshold SOC of the battery module capacity Bth高 .

[0080] With such settings, this embodiment enables the auxiliary power of the elevator energy system to use the power in the battery module to the maximum while ensuring the stable and reliable operation of the elevator energy-saving control system based on the auxiliary power supply module, reducing the use of the mains power, and achieving the effect of optimal energy-saving benefits.

[0081] It should be noted that when the battery module and the elevator are in a conducting circuit, if V Ci < V B , then the battery module is also used to automatically discharge to the i-th elevator; wherein, V Ci represents the voltage of the i-th elevator, and V B represents the rated voltage of the battery module; if V Ci > V B , then the battery module is also used to automatically store the regenerative energy generated when the i-th elevator ascends or descends.

[0082] When there are multiple elevators, in order to ensure the electrical safety of the elevators during maintenance or inspection, in a further embodiment, the energy-saving control module is further used to obtain the states of each elevator; wherein, the states of the elevator include working or faulty;

[0083] When K elevators among all elevators are in a faulty state, the energy-saving control module is further used to control the contactor groups corresponding to these K elevators to be disconnected; wherein, 1 ≤ K < N, and N is the number of elevators;

[0084] When all elevators are in a fault state, the energy-saving control module is also used to control the circuit breaker and all contactor groups to disconnect.

[0085] To ensure the stable operation of the elevator during a power outage, in this embodiment, the battery module includes Y battery packs connected in parallel, and each battery pack includes X cells connected in series.

[0086] The battery module needs to meet the condition Q. Bsum =Q C备sum +Q C耗sum ;

[0087] In the formula, Q Bsum Q represents the maximum capacity of the battery module. C备sum This represents the amount of electricity required for all elevators to operate normally during the longest historical power outage in the local area; Q C耗sum This indicates the electricity required for all elevators to operate normally during non-minimum electricity price periods on that day;

[0088] Among them, Q Bsum =(C B额 ×X)×Y; where C B额 This indicates the rated capacity of each battery cell;

[0089] in, In the formula, T 市停 P indicates the longest recorded power outage in the local area. CMAXi Let N represent the maximum power of the i-th elevator, and N represent the number of elevators, i = 1, 2, ..., N;

[0090] in, In the formula, T 非低 This indicates the duration of the non-minimum electricity price period on that day.

[0091] In actual production, for subsequent investment return calculations, it is necessary to accurately calculate the energy savings of the elevator after the installation of the elevator energy-saving control system based on the auxiliary power supply module. Therefore, to solve this problem, in this embodiment, a first energy sampling module is connected between the auxiliary power supply module and the mains power, a third energy sampling module is connected between the electrode connection terminal of the battery module and the circuit breaker, a second energy sampling module is connected between each contactor group and the corresponding elevator, and a fourth energy sampling module is connected between each elevator and the mains power; the first, second, third, and fourth energy sampling modules are respectively communicatively connected to the energy-saving control module.

[0092] In specific implementation, the first power sampling module is used to acquire the first power consumption information of the mains power supply to the auxiliary power supply module; the third power sampling module is used to acquire the third power consumption information of the battery module discharging or the fourth power consumption information of the battery module charging; the fourth power sampling module is used to acquire the fifth power consumption information of the mains power supply to each elevator; the second power sampling module is used to acquire the sixth power consumption information of the battery module supplying power to each elevator or the second power consumption information of each elevator discharging to the battery module; the energy-saving control module is used to calculate the total power saving based on the first, second, third, fourth, fifth and sixth power consumption information.

[0093] The total electricity saved is

[0094] In the formula, ΔQ represents the total amount of electricity, and Q PA Q represents the amount of electricity in the first electricity consumption information. PE放 Q represents the amount of electricity in the third-party electricity consumption information. PE充 Q represents the amount of electricity in the fourth electricity consumption information. PCj This represents the electricity consumption in the fifth electricity consumption information, where N is the number of elevators, j = 1 to N, i = 1 to N, and Q Pi放 Q represents the amount of electricity in the sixth electricity consumption information. Pi充 This indicates the amount of electricity used in the second electricity consumption information.

[0095] In one embodiment, PA is the sampling position of the first power sampling module, PC1 to PCN are the sampling positions of the fourth power sampling module, PE is the sampling position of the third power sampling module, and P1 to PN are the sampling positions of the second power sampling module.

[0096] To facilitate the energy-saving control module in accurately determining the status of the mains power, in further implementation, each power consumption information also includes current, frequency, and power; when both the first and fifth power consumption information meet the preset power outage conditions, the current mains power is in a power outage state.

[0097] Among them, the preset conditions for power outage are: current < mains stable current threshold and duration > mains stable duration threshold, voltage < mains stable voltage threshold and duration > mains stable duration threshold, frequency < mains stable frequency threshold and duration > mains stable duration threshold, or power < mains stable power threshold and duration > mains stable duration threshold.

[0098] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An elevator energy-saving control system based on an auxiliary power supply module, characterized in that, include: Battery module, auxiliary power supply module, and energy-saving control module; The battery module is connected to a circuit breaker, which is connected to at least one contactor group for one-to-one connection with at least one elevator. The circuit breaker is connected to the same bypass contactor with all contactor groups, and the bypass contactor is connected in parallel with an anti-reverse diode. The mains power and the battery module are respectively connected to the auxiliary power supply module, which is connected to the energy-saving control module. The energy-saving control module is communicatively connected to the circuit breaker, contactor group, bypass contactor, battery module, and auxiliary power supply module.

2. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, During normal elevator operation, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to close, and acquires the elevator status information and battery module power information. The elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators generating regenerative power R, and the number of elevators using electricity S. The energy-saving control module calculates the total regenerative energy Q generated by elevator R based on the elevator's status information. R And the total energy consumption Q of elevator S s The rechargeable capacity Q of the battery module is calculated based on the battery module's power information. 充max and discharge capacity Q 放max ; If Q R Q s And Q R -Q s Q 充max Then, the control battery module receives power to Q. 充max The contactor group corresponding to the elevator in section R is disconnected at that time. If Q R s And Q s -Q R Q 放max Then, the control battery module discharges to the elevator to Q. 放max The contactor group corresponding to the elevator in section R is disconnected at that time.​ If Q R =Q s Then, the battery module will not be charged or discharged between itself and the elevator.

3. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, When the elevator is running normally, if the mains power fails and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker, bypass contactor and at least one contactor group to be in the closed state. The battery module and contactor group are controlled to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or does not charge or discharge with the elevator. The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module. When the mains power fails and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and controls the circuit breaker and at least one contactor group to be in the closed state and the bypass contactor to be open, so as to control the battery module to receive the regenerative energy generated by the elevator rising or falling; wherein, the first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

4. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, When all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to disconnect. When there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and starts the system hibernation mode. The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, and the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module. The first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module. When the mains power fails, if the battery module meets the third preset condition, the energy-saving control module will also control the auxiliary power supply module to switch its power input to the battery module and control the battery module to maintain its working mode; if the battery module meets the first preset condition, the energy-saving control module will also control the auxiliary power supply module to switch its power input to the battery module and control the battery management system in the battery module to shut down and start the system hibernation mode.

5. The elevator energy-saving control system based on an auxiliary power supply module according to claim 4, characterized in that, When the system hibernation mode is activated, the energy-saving control module automatically wakes up every T time interval to check whether the battery module meets the second preset condition. If the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode. The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity threshold, the total voltage of the battery module is greater than the high voltage threshold of the battery module, or the SOC of the battery module is greater than the high capacity threshold of the battery module.

6. The elevator energy-saving control system based on an auxiliary power supply module according to claim 4, characterized in that, After the system enters sleep mode, the energy-saving control module automatically wakes up every T time interval to check whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the exit of the system sleep mode, and controls the circuit breaker, bypass contactor and each contactor group to close. It also controls the battery management system of the battery module to operate normally, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

7. The elevator energy-saving control system based on an auxiliary power supply module according to claim 4, characterized in that, While maintaining the battery module's operating mode, the energy-saving control module also detects whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the circuit breaker, bypass contactor, and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator.

8. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, When the elevator is running normally, if there is mains power and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input to mains power, and controls the circuit breaker and each contactor group to close and the bypass contactor to open, so as to use the regenerative energy generated by the elevator rising or falling to charge the battery module; wherein, the first preset condition is that the voltage of any single cell in the battery module is less than the undervoltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module. When the regenerative energy generated by the elevator's ascent or descent is used to charge the battery module until the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input from the mains power to the battery module. It also controls the circuit breaker, each contactor group, and the bypass contactor to close, and controls the battery module and the contactor group to cooperate so that the battery module supplies power to the elevator or receives the regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges. The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell's voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell's capacity threshold, the total voltage of the battery module is greater than the battery module's high voltage threshold, or the battery module's SOC is greater than the battery module's high capacity threshold.

9. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, The auxiliary power supply module is connected to the mains power supply via a first energy sampling module, the battery module is connected to the circuit breaker via a third energy sampling module, each contactor group is connected to the corresponding elevator via a second energy sampling module, and each elevator is connected to the mains power via a fourth energy sampling module. The first, second, third, and fourth power sampling modules are communicatively connected to the energy-saving control module. The system comprises the following modules: a first power sampling module for acquiring first power consumption information of mains power supply to auxiliary power supply module; a third power sampling module for acquiring third power consumption information of battery module discharge or fourth power consumption information of battery module charging; a fourth power sampling module for acquiring fifth power consumption information of mains power supply to each elevator; a second power sampling module for acquiring sixth power consumption information of battery module power supply to each elevator or second power consumption information of each elevator discharging to battery module; and an energy-saving control module for calculating the total power saving based on the first, second, third, fourth, fifth, and sixth power consumption information. Each piece of electricity usage information includes the amount of electricity consumed.

10. The elevator energy-saving control system based on an auxiliary power supply module according to claim 1, characterized in that, The total electricity saved is In the formula, ΔQ represents the total amount of electricity, and Q PA Indicates the first electricity consumption information, Q PE放 Indicates third-party electricity consumption information, Q PE充 This indicates the fourth electricity consumption information, Q. PCj This represents the fifth electricity consumption information, where N is the number of elevators, j = 1 to N, i = 1 to N, and Q... Pi放 This indicates the sixth electricity consumption information.

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