Elevator energy-saving control system and control method

Abstract

The invention discloses an elevator energy-saving control system and method. The elevator energy-saving control system comprises a battery module, a conversion module, an auxiliary power supply module and an energy-saving control module. The electrode connecting ends of the battery module are used for being connected with the connecting ends of a plurality of elevators in a one-to-one correspondence mode. The input end of the auxiliary power supply module is connected with the mains supply and the electrode connecting end of the battery module, the output end of the auxiliary power supply module is connected with the power end of the energy-saving control module and the power end of the conversion module, the alternating-current side of the conversion module is used for being connected with the mains supply, and the direct-current side of the conversion module is connected with the electrode connecting end of the battery module. The energy-saving control module is in communication connection with the battery module, the conversion module and the auxiliary power supply module. The economical efficiency of electricity utilization of the elevator is effectively improved, and the electricity utilization cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator energy saving, and in particular to an elevator energy saving control system and a control method. Background Art

[0002] The energy source of current elevators is the mains electricity. When the mains electricity is cut off, the elevator cannot run stably for a long time, affecting daily work and life. At the same time, when the elevator drives the main circuit, it will generate regenerative energy. The current common way to deal with it is to consume it through consumption resistance, so there is a lot of energy waste.

[0003] For example, the Chinese patent with publication number CN115483734A realizes the recovery of elevator drive regeneration energy by configuring an elevator energy storage pile, and at the same time charges the energy storage pile according to the valley period of the city electricity price, and discharges the elevator during the peak period of the electricity price, so as to reduce the cost of elevator electricity consumption. However, the DCDC device is used between the energy storage pile and the elevator in this patent, and the design is redundant, resulting in a complex energy control algorithm and the inability to reversely send power to the power grid. Moreover, one energy storage pile in this patent corresponds to multiple elevators, but multiple elevators share the same city power supply circuit. When one of the elevators fails, the normal energy storage power supply of other elevators cannot be realized. In addition, many low-voltage control devices in the elevator energy-saving control system in this patent require auxiliary power supply, and power consumption exists for a long time. There is no description of the auxiliary power supply of electrical equipment here. Therefore, there is still an energy-saving solution that is too complex and redundant, and it is impossible to realize the partial power supply control of multiple elevators, and it is impossible to achieve the optimal economic benefits. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes an elevator energy-saving control system and a control method.

[0005] In a first aspect, the present invention provides an elevator energy-saving control system, comprising: a battery module, a conversion module, an auxiliary power supply module and an energy-saving control module; The electrode connection end of the battery module is used to be connected to the connection ends of multiple elevators in a one-to-one correspondence; the input end of the auxiliary power supply module is respectively connected to the mains and the electrode connection end of the battery module, the output end of the auxiliary power supply module is respectively connected to the power supply end of the energy-saving control module and the power supply end of the conversion module, the AC side of the conversion module is used to connect to the mains, and the DC side of the conversion module is connected to the electrode connection end of the battery module; the energy-saving control module is respectively connected to the battery module, the conversion module and the auxiliary power supply module for communication; Among them, the conversion module is used to convert the AC power into DC power and charge the battery module or to invert the DC power of the AC power module into AC power and transmit it to the AC power; the auxiliary power supply module is used to control its power input to switch between the AC power and the battery module; the energy-saving control module is used to obtain the AC power information and the power information of the battery module, and control the coordinated actions of the battery module, the conversion module and the auxiliary power supply module according to the AC power information and the power information of the battery module to achieve energy-saving electricity use of multiple elevators.

[0006] In this embodiment, the city power information includes the city power status and the time-of-use electricity price list, the city power status includes the city power is on or the city power is off, and the time-of-use electricity price list includes the off-peak period and the off-peak period city power price, the off-peak period and the off-peak period city power price; The power information of the battery module includes the state of the battery module and the voltage of the battery module; the state of the battery module includes one of the state that the battery module is low in power and the state that the battery module is full of power; During the coordinated action, when the city power fails, the energy-saving control module is used to control the action of the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; When the mains is powered and the battery module is low on power, the energy-saving control module is used to control the auxiliary power supply module to switch the power input of the auxiliary power supply module from the battery module to the mains; When the mains is powered, the battery module is powered, and the current mains electricity price is in the off-peak period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the battery module to the mains; When the mains is powered, the battery module is powered, and the current mains electricity price is in a non-valley period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the mains to the battery module.

[0007] In this embodiment, when the city power is available and the current city power price is in the valley period, the energy-saving control module is also used to control the operation of the change module to convert the city power into direct current to charge the battery module until the battery module is fully charged. SOC Reaching its limit , and the battery module SOC Reaching its limit The time is recorded as ; Calculate the battery module SOC Reaching its limit The time difference between the time of ;in, , Indicates the time when the valley segment ends; like , the energy-saving control module is also used to control the conversion module to continue charging the battery module until the battery module SOC When the battery reaches 100%, charging stops; The shortest time required for cell balancing of the battery module; SOC achieve During the time period from the start time to the stop time of charging, the energy-saving control module is also used to control the battery module to perform cell balancing.

[0008] In this embodiment, during the coordinated action process, when the city power fails, the energy-saving control module is also used to control the conversion module not to act; like , the battery module is also used to automatically supply Elevator discharge; among them, Indicates The voltage of the elevator, Indicates the rated voltage of the battery module; like , the battery module is also used to automatically store the Regenerative energy generated when an elevator ascends or descends.

[0009] In this embodiment, when the city electricity is available and the current city electricity price is in a non-valley period, the energy-saving control module is also used to control the conversion module not to act; like , the battery module is also used to automatically supply Elevator discharge; like , the battery module is also used to automatically store the Regenerative energy generated when an elevator ascends or descends.

[0010] In this embodiment, when the conversion module is a bidirectional conversion module, if the current city electricity price is in a non-valley period, the energy-saving control module is further used to control the battery module to discharge to the city electricity.

[0011] In this embodiment, the battery module includes Y Each battery pack includes a battery pack connected in series. X Cells; Among them, the conditions that the battery module needs to meet are: ; In the formula, Indicates the maximum capacity of the battery module. Indicates the amount of electricity required for the normal operation of all elevators when the local mains power outage lasts the longest in history; Indicates the amount of electricity required for normal operation of all elevators in non-valley sections; in, ; In the formula, Indicates the rated capacity of each battery cell; in, ; In the formula, Indicates the longest power outage time in the local city. Indicates The maximum power of the elevator, N represents the number of elevators, ; in, ; In the formula, Indicates the duration of the non-valley segment.

[0012] In this embodiment, it also includes a circuit breaker, a plurality of contactor groups and a plurality of fuse groups; The electrode connection end of the battery module is connected to the input end of the circuit breaker, the output end of the circuit breaker is respectively connected to the input ends of multiple contactor groups, the output ends of the multiple contactor groups are connected one-to-one with the input ends of multiple fuse groups, and the output ends of the multiple fuse groups are used to be connected one-to-one with the connection ends of multiple elevators.

[0013] In this embodiment, the energy-saving control module is also used to obtain the status of each elevator; wherein the status of the elevator includes working or maintenance; When all the elevators K When an elevator is under maintenance, the energy-saving control module is also used to control the K The contactor group corresponding to the elevator is disconnected; among them, , N is the number of elevators; When all elevators are in maintenance status, the energy-saving control module is also used to control the circuit breaker and all contactor groups to be disconnected.

[0014] In a second aspect, the present invention further proposes an elevator energy-saving control method, which is applied to the elevator energy-saving control system described in any one of the first aspects, comprising: Obtaining the mains power information and battery module power information; According to the city power information and the power information of the battery module, the battery module, the conversion module and the auxiliary power supply module are controlled to coordinate actions to achieve energy-saving electricity use for multiple elevators.

[0015] In the present invention, the proposed elevator energy-saving control system and control method can add the charging and discharging electrical connection of the battery module without changing the electrical system of the original elevator, and supply power to the conversion module and the energy-saving control module during the whole life cycle operation through the auxiliary power supply module, which can effectively prevent the problem that the elevator energy-saving control system cannot operate when the mains power is cut off; moreover, the mains power information and the power information of the battery module are obtained through the control module at the same time, and the battery module, the conversion module and the auxiliary power supply module are controlled to coordinate the actions according to the mains power information and the power information of the battery module to realize energy-saving electricity use of multiple elevators, thereby ensuring that the battery module and the elevator can charge and discharge each other, and each elevator can draw power from both the mains and the battery module, and the regenerated energy of the elevator drive can reversely charge the battery module, which effectively improves the economy of elevator electricity use and reduces electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of an elevator energy-saving control system in one embodiment of the present invention.

[0017] Figure 2 A schematic diagram of power supply of an auxiliary power supply module in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of power flow during the electricity price valley period in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of a battery module discharging electricity to an elevator during a power outage in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of charging a battery module by an elevator during a power outage in an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the battery module discharging to the elevator when the electricity price is not in the valley period in one embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of charging a battery module when the electricity price is not in a valley period in an embodiment of the present invention.

[0023] Figure 8 A schematic diagram of power flow of a battery module participating in peak-valley arbitrage in a power grid in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] First, as Figure 1 As shown, an elevator energy-saving control system proposed by the present invention includes: a battery module, a conversion module, an auxiliary power supply module and an energy-saving control module; The electrode connection end of the battery module is used to be connected to the connection ends of multiple elevators in a one-to-one correspondence; the AC side of the conversion module is used to connect to the mains, and the DC side of the conversion module is connected to the input end of the circuit breaker; the input end of the auxiliary power supply module is respectively connected to the mains and the electrode connection end of the battery module, the output end of the auxiliary power supply module is respectively connected to the power supply end of the energy-saving control module and the power supply end of the conversion module, and the energy-saving control module is respectively connected to the battery module, the conversion module and the auxiliary power supply module for communication; Among them, the conversion module is used to convert the AC power into DC power and charge the battery module or to invert the DC power of the AC power module into AC power and transmit it to the AC power; the auxiliary power supply module is used to control its power input to switch between the AC power and the battery module; the energy-saving control module is used to obtain the AC power information and the power information of the battery module, and control the coordinated actions of the battery module, the conversion module and the auxiliary power supply module according to the AC power information and the power information of the battery module to achieve energy-saving electricity use of multiple elevators.

[0026] The present invention can add charging and discharging electrical connections for the battery module without changing the electrical system of the original elevator, and supply power to the conversion module and the energy-saving control module during the full life cycle operation through the auxiliary power supply module, which can effectively prevent the problem that the elevator energy-saving control system cannot operate when the mains power is cut off; moreover, the mains power information and the power information of the battery module are obtained through the control module at the same time, and the coordinated actions of the battery module, the conversion module and the auxiliary power supply module are controlled according to the mains power information and the power information of the battery module to realize energy-saving electricity use of multiple elevators, thereby ensuring that the battery module and the elevator can charge and discharge each other, and each elevator can draw power from both the mains and the battery module, and the regenerated energy driven by the elevator can reversely charge the battery module, which effectively improves the economy of elevator electricity use and reduces electricity costs.

[0027] The energy-saving control module may obtain the mains power information through an electric meter or other components capable of obtaining the mains power information.

[0028] In this embodiment, the city power information includes one of city power on and city power off.

[0029] In this embodiment, the power information of the battery module includes the state of the battery module and the voltage of the battery module. The state of the battery module includes one of the state that the battery module is low in power and the state that the battery module is full of power.

[0030] like Figure 2 As shown, during the coordinated action process, when the city power fails, the energy-saving control module is used to control the action of the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; When the mains is powered and the battery module is low on power, the voltage of the battery module Below the preset power supply threshold When the energy-saving control module is used to control the action of the auxiliary power supply module, the power input of the auxiliary power supply module is switched from the battery module to the mains.

[0031] Since the conversion module and the energy-saving control module require auxiliary power supply during their entire life cycle, the configuration of this embodiment can effectively prevent the elevator energy-saving control system from being unable to operate when the city power is cut off.

[0032] In a further embodiment, the energy-saving control module is also used to obtain the city power price information, and control the battery module, conversion module and auxiliary power supply module to coordinate actions according to the city power information, the power information of the battery module and the city power price information to achieve energy-saving electricity use of multiple elevators.

[0033] The city electricity price information includes: off-peak and off-peak city electricity prices, and off-peak and off-peak city electricity prices.

[0034] The energy-saving control module may be preset with the mains electricity price information, or may be connected to an external mains electricity price information acquisition module for communication to obtain the mains electricity price information.

[0035] During the coordinated action, when the city power fails, the energy-saving control module is used to control the action of the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; When the mains is powered and the battery module is low on power, the energy-saving control module is used to control the auxiliary power supply module to switch the power input of the auxiliary power supply module from the battery module to the mains; When the mains is powered and the current mains electricity price is in the off-peak period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the battery module to the mains; When the mains is available and the current mains electricity price is in a non-off-peak period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the mains to the battery module.

[0036] This embodiment is configured in this way, which can effectively improve the battery economy and reduce electricity costs while preventing the elevator energy-saving control system from failing to operate.

[0037] The working state of the elevator is complex, including standby, descending process, and ascending process. When the elevator is working, the voltages at its connection terminals (positive connection terminal and negative connection terminal) are and , is any positive integer from 1 to N, where N is the number of elevators. The voltage across the elevator during the entire working process and Both Range, The maximum power of the elevator is .

[0038] The longest power outage in the local city , then when the city power outage occurs, in order to ensure the normal operation of the elevator, the elevator needs power ; The duration of the local city power valley is , the duration of the non-valley segment is , then the power required for normal operation of all elevators in non-valley sections is Therefore, the maximum energy of the battery module required to be configured in this embodiment is .

[0039] Assume that the rated voltage of each cell is , the rated voltage range is , rated capacity is During the entire operation of the elevator, the battery module is slowly charged and discharged, that is, the battery module SOC exist For stable operation, the number of cells in series in each battery pack Follow the settings below: , ;in, choose and The largest one, namely ; Thus, the number of battery packs required to configure the battery module can be obtained for .

[0040] Therefore, the battery module in this embodiment includes Y Battery packs, Y battery packs are connected in parallel; each battery pack includes X Cells, X The battery cells are connected in series to ensure the normal operation of the elevator when the mains power is cut off.

[0041] When the elevator is in normal daily operation, in order to achieve energy saving, in this embodiment, the energy saving control module is used to control the conversion module to achieve energy saving of multiple elevators, specifically including: When the city power is available and the current city power price is in the valley, the energy-saving control module is also used to control the action of the change module to convert the city power into direct current to charge the battery module until the battery module reaches the state of charge. SOC Reaching state of charge SOC Upper limit , and the battery module SOC Reaching state of charge SOC Upper limit The time is recorded as ; Calculate the battery module SOC Reaching its limit The time difference between the time of ;in, , Indicates the time when the valley segment ends; like , the energy-saving control module is also used to control the conversion module to continue charging the battery module until the battery module SOC When the battery reaches 100%, charging stops; The shortest time required for cell balancing in a battery module; SOC achieve During the time period from the start time to the stop time of charging, the energy-saving control module is also used to perform cell balancing control on the battery module.

[0042] It can be seen that the power input of the auxiliary power supply module in this embodiment is the mains power. The auxiliary power supply module converts the mains power into low-voltage power to provide auxiliary power for the conversion module and the energy-saving control module; the conversion module converts the mains power into direct current to charge the battery module. At this time, the elevator can draw power from the mains to operate normally, and the power flow is as follows: Figure 3 This embodiment can utilize the city electricity when the power price of the power grid is the lowest to charge the battery and power the elevator, thereby achieving the lowest electricity cost effect.

[0043] When When the elevator is ascending or descending, The connection terminals of the elevator will generate voltage ;in, .

[0044] In order to ensure the normal operation of the elevator when the city power is cut off, in this embodiment, during the coordination action process, when the city power is cut off, the energy-saving control module is also used to control the conversion module not to act; like , the battery module is also used to automatically supply Elevator discharge; among them, Indicates The voltage of the elevator, Indicates the rated voltage of the battery module; like , the battery module is also used to automatically store the Regenerative energy generated when an elevator ascends or descends.

[0045] Therefore, in this embodiment, when the city power is cut off, the energy-saving control module controls the auxiliary power supply module to switch its power input to the battery module, and the auxiliary power supply module uses the battery module to power the conversion module and the energy-saving control module; and the energy-saving control module controls the conversion module not to operate. Elevator voltage , the battery module automatically discharges to the elevator, and the power flows to Figure 4 As shown; if Elevator voltage , then When the elevator goes up or down, it generates regenerative energy which automatically charges the battery module. The power flows to Figure 5 shown.

[0046] This embodiment can fully realize the regenerative energy recovery of the elevator while ensuring the normal operation of the elevator, thereby achieving the maximum energy saving effect.

[0047] In another embodiment, when the city electricity is available and the current city electricity price is in a non-valley period, the energy-saving control module is further used to control the conversion module not to operate; like , the battery module is also used to automatically supply The elevator discharges, and the power flows as follows Figure 6 As shown; like , the battery module is also used to automatically store the The regenerative energy generated when the elevator rises or descends, the power flows as follows Figure 7 shown.

[0048] Since the power price of the power grid is higher during non-valley periods, this embodiment is configured so that the elevator draws electricity from the battery module, avoiding the peak period of electricity prices and achieving the lowest electricity cost. At the same time, the renewable energy generated by the elevator can also be used to charge the battery to achieve energy recovery.

[0049] In this embodiment, it also includes a circuit breaker, a plurality of contactor groups and a plurality of fuse groups; The electrode connection end of the battery module is connected to the input end of the circuit breaker, the output end of the circuit breaker is respectively connected to the input ends of multiple contactor groups, the output ends of the multiple contactor groups are connected one-to-one with the input ends of multiple fuse groups, and the output ends of the multiple fuse groups are used to be connected one-to-one with the connection ends of multiple elevators.

[0050] This embodiment is configured in this way to effectively ensure the electrical safety of elevators in maintenance status. When one elevator fails, the other elevators can still operate normally.

[0051] It should be understood that the electrode connection terminal of the battery module in this embodiment is used as an input terminal and can also be used as an output terminal. The electrode connection terminal of the battery module in this embodiment includes a positive terminal and a negative terminal. Similarly, the input terminal and the output terminal of the circuit breaker also include positive and negative terminals, each contactor group includes a positive contactor and a negative contactor, and each fuse group includes two fuses, one fuse is connected between the corresponding positive contactor and the positive connection terminal of the corresponding elevator, and the other fuse is connected between the corresponding negative contactor and the negative connection terminal of the corresponding elevator.

[0052] In another embodiment, the energy-saving control module is further used to obtain the status of each elevator; wherein the status of the elevator includes working or maintenance; When multiple elevators K When an elevator is under maintenance, the energy-saving control module controls the K The contactor group corresponding to the elevator is disconnected to ensure K The electrical safety of the elevator maintenance and the normal operation of the remaining elevators; , N is the number of elevators; When all elevators are in maintenance status, the energy-saving control module controls the circuit breaker and all contactor groups to disconnect to ensure electrical safety during the elevator maintenance phase.

[0053] When some elevators R among N elevators are under maintenance, it is converted into the excess capacity of the battery module. for ,in, ; , Indicates the duration of the non-valley segment.

[0054] It should be noted that the transformation module in this embodiment may be a unidirectional transformation module or a bidirectional transformation module.

[0055] In a further embodiment, when the conversion module is a bidirectional conversion module, if the current city electricity price is in a non-valley period, the energy-saving control module is also used to control the battery module to discharge to the city electricity to obtain high electricity price benefits.

[0056] This embodiment can participate in the peak-valley arbitrage of the power grid to maximize profits and promote the rapid transformation of elevators to low-carbonization.

[0057] Among them, the energy-saving control module controls the conversion module and the battery module to cooperate according to the discharge power Discharge to the mains grid; wherein, , the power flow is Figure 8 shown.

[0058] In a further embodiment, the battery module is further used to report battery failure to the energy saving control module; When the battery module reports a battery failure to the energy-saving control module, the energy-saving control module controls the circuit breaker and all contactor groups to disconnect to ensure the safety of the elevator energy-saving control system.

[0059] In a second aspect, the present invention further proposes an elevator energy-saving control method, which is applied to the elevator energy-saving control system described in any one of the first aspects, comprising: Obtaining the mains power information and battery module power information; According to the city power information and the power information of the battery module, the battery module, the conversion module and the auxiliary power supply module are controlled to coordinate actions to achieve energy-saving electricity use for multiple elevators.

[0060] Among them, the city power information includes the city power status and the time-of-use electricity price list. The city power status includes whether the city power is on or the city power is off. The time-of-use electricity price list includes the off-peak period and the off-peak period city power price, and the non-off-peak period and the non-off-peak period city power price.

[0061] The power information of the battery module includes the state of the battery module and the voltage of the battery module; the state of the battery module includes one of the state that the battery module is low on power and the state that the battery module is full of power.

[0062] During the coordinated action, when the city power fails, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; When the mains is powered and the battery module is low on power, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module from the battery module to the mains; When the mains has electricity, the battery module has electricity, and the current mains electricity price is in the valley period, the energy-saving control module controls the auxiliary power supply module to switch its power input from the battery module to the mains; When the mains is powered, the battery module is powered, and the current mains electricity price is in a non-valley period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the mains to the battery module.

[0063] When the city power is available and the current city power price is in the valley, the energy-saving control module is also used to control the action of the change module to convert the city power into direct current to charge the battery module until the battery module is fully charged. SOC Reaching its limit , and the battery module SOC Reaching its limit The time is recorded as ; Calculate the battery module SOC Reaching its limit The time difference between the time of ;in, , Indicates the time when the valley segment ends; like , the energy-saving control module controls the conversion module to continue charging the battery module until the battery module SOC When the battery reaches 100%, charging stops; The shortest time required for cell balancing of the battery module; SOC achieve During the time period from the charging time to the charging stop time, the energy-saving control module controls the battery module to perform cell balancing.

[0064] In this embodiment, when the city power is off, the energy-saving control module controls the conversion module to not operate; like , the battery module automatically Elevator discharge; among them, Indicates The voltage of the elevator, Indicates the rated voltage of the battery module; like , the battery module automatically stores the Regenerative energy generated when an elevator ascends or descends.

[0065] In this embodiment, when the city electricity is available and the current city electricity price is in the non-valley period, the energy-saving control module controls the conversion module not to operate; like , the battery module automatically Elevator discharge; like , the battery module automatically stores the Regenerative energy generated when an elevator ascends or descends.

[0066] In this embodiment, when the conversion module is a bidirectional conversion module, if the current city electricity price is in a non-valley period, the energy-saving control module controls the battery module to discharge to the city electricity.

[0067] The battery module in this embodiment includes Y Each battery pack includes a battery pack connected in series. X Cells; Among them, the conditions that the battery module needs to meet are: ; In the formula, Indicates the maximum capacity of the battery module. Indicates the amount of electricity required for the normal operation of all elevators when the local mains power outage lasts the longest in history; Indicates the amount of electricity required for normal operation of all elevators in non-valley sections; in, ; In the formula, Indicates the rated capacity of each battery cell; in, ; In the formula, Indicates the longest power outage time in the local city. Indicates The maximum power of the elevator, N represents the number of elevators, ; in, ; In the formula, Indicates non-valley segment.

[0068] The elevator energy-saving control system in this embodiment also includes a circuit breaker, multiple contactor groups and multiple fuse groups; the electrode connection end of the battery module is connected to the input end of the circuit breaker, the output end of the circuit breaker is respectively connected to the input ends of the multiple contactor groups, the output ends of the multiple contactor groups are connected to the input ends of the multiple fuse groups in a one-to-one correspondence, and the output ends of the multiple fuse groups are used to be connected to the connection ends of the multiple elevators in a one-to-one correspondence.

[0069] In this embodiment, the energy-saving control module controls the status of each elevator; wherein the status of the elevator includes working or maintenance; When R of all elevators are in maintenance status, the energy-saving control module controls the contactor group corresponding to the R elevators to be disconnected; wherein, , N is the number of elevators; When all elevators are in maintenance status, the energy-saving control module controls the circuit breaker and all contactor groups to be disconnected.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An elevator energy-saving control system, characterized in that: include: Battery module, conversion module, auxiliary power supply module and energy-saving control module; The electrode connection terminals of the battery module are used to be connected to the connection terminals of multiple elevators in a one-to-one correspondence; The input end of the auxiliary power supply module is respectively connected to the mains and the electrode connection end of the battery module, the output end of the auxiliary power supply module is respectively connected to the power supply end of the energy-saving control module and the power supply end of the conversion module, the AC side of the conversion module is used to connect to the mains, and the DC side of the conversion module is connected to the electrode connection end of the battery module; the energy-saving control module is respectively connected to the battery module, the conversion module and the auxiliary power supply module; Among them, the conversion module is used to convert the AC power into DC power and charge the battery module or to invert the DC power of the AC power module into AC power and transmit it to the AC power; the auxiliary power supply module is used to control its power input to switch between the AC power and the battery module; the energy-saving control module is used to obtain the AC power information and the power information of the battery module, and control the coordinated actions of the battery module, the conversion module and the auxiliary power supply module according to the AC power information and the power information of the battery module to achieve energy-saving electricity use of multiple elevators.

2. The elevator energy-saving control system according to claim 1, characterized in that: The city power information includes the city power status and the time-of-use electricity price list. The city power status includes the city power is on or the city power is off. The time-of-use electricity price list includes the off-peak period and the off-peak period city power price, and the off-peak period and the off-peak period city power price; The power information of the battery module includes the state of the battery module and the voltage of the battery module; the state of the battery module includes one of the state that the battery module is low in power and the state that the battery module is full of power; During the coordinated action, when the city power fails, the energy-saving control module is used to control the action of the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; When the mains is powered and the battery module is low on power, the energy-saving control module is used to control the auxiliary power supply module to switch the power input of the auxiliary power supply module from the battery module to the mains; When the mains is powered, the battery module is powered, and the current mains electricity price is in the off-peak period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the battery module to the mains; When the mains is powered, the battery module is powered, and the current mains electricity price is in a non-valley period, the energy-saving control module is used to control the auxiliary power supply module to switch its power input from the mains to the battery module.

3. The elevator energy-saving control system according to claim 2, characterized in that: When the city power is available and the current city power price is in the valley period, the energy-saving control module is also used to control the action of the change module to convert the city power into direct current to charge the battery module until the battery module is fully charged. SOC Reaching its limit , and the battery module SOC Reaching its limit The time is recorded as ; Calculate the battery module SO C reaches its upper limit The time difference between the time of ;in, , Indicates the time when the valley segment ends; like , the energy-saving control module is also used to control the conversion module to continue charging the battery module until the battery module SOC When the battery reaches 100%, charging stops; The shortest time required for cell balancing of the battery module; SOC achieve During the time period from the start time to the stop time of charging, the energy-saving control module is also used to control the battery module to perform cell balancing.

4. The elevator energy-saving control system according to claim 2, characterized in that: During the coordinated action, when the city power fails, the energy-saving control module is also used to control the conversion module not to act; like , the battery module is also used to automatically supply Elevator discharge; among them, Indicates The voltage of the elevator, Indicates the rated voltage of the battery module; like , the battery module is also used to automatically store the Regenerative energy generated when an elevator ascends or descends.

5. The elevator energy-saving control system according to claim 4, characterized in that: When the city electricity is available and the current city electricity price is in the off-peak period, the energy-saving control module is also used to control the conversion module not to act; like , the battery module is also used to automatically supply Elevator discharge; like , the battery module is also used to automatically store the Regenerative energy generated when an elevator ascends or descends.

6. The elevator energy-saving control system according to claim 2, characterized in that: When the conversion module is a bidirectional conversion module, if the current city electricity price is in a non-valley period, the energy-saving control module is also used to control the battery module to discharge to the city electricity.

7. The elevator energy-saving control system according to claim 1, characterized in that: The battery module includes Y Each battery pack includes a battery pack connected in series. X Cells; Among them, the conditions that the battery module needs to meet are: ; In the formula, Indicates the maximum capacity of the battery module. Indicates the amount of electricity required for the normal operation of all elevators when the local mains power outage lasts the longest in history; Indicates the amount of electricity required for normal operation of all elevators in non-valley sections; in, ; In the formula, Indicates the rated capacity of each battery cell; in, ; In the formula, Indicates the longest power outage time in the local city. Indicates The maximum power of the elevator, N represents the number of elevators, ; in, ; In the formula, Indicates the duration of the non-valley segment.

8. The elevator energy-saving control system according to claim 1, characterized in that: Also included are a circuit breaker, a plurality of contactor groups, and a plurality of fuse groups; The electrode connection end of the battery module is connected to the input end of the circuit breaker, the output end of the circuit breaker is respectively connected to the input ends of multiple contactor groups, the output ends of the multiple contactor groups are connected one-to-one with the input ends of multiple fuse groups, and the output ends of the multiple fuse groups are used to be connected one-to-one with the connection ends of multiple elevators.

9. The elevator energy-saving control system according to claim 8, characterized in that: The energy-saving control module is also used to obtain the status of each elevator; wherein the status of the elevator includes working or maintenance; When all the elevators K When an elevator is under maintenance, the energy-saving control module is also used to control the K The contactor group corresponding to the elevator is disconnected; among them, , N is the number of elevators; When all elevators are in maintenance status, the energy-saving control module is also used to control the circuit breaker and all contactor groups to be disconnected.

10. An elevator energy-saving control method, applied to the elevator energy-saving control system according to any one of claims 1 to 9, characterized in that: include: Obtaining the mains power information and battery module power information; According to the city power information and the power information of the battery module, the battery module, the conversion module and the auxiliary power supply module are controlled to coordinate actions to achieve energy-saving electricity use for multiple elevators.

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