CN109193723B - Combined base station backup energy storage power supply and control method - Google Patents

Combined base station backup energy storage power supply and control method Download PDF

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Publication number
CN109193723B
CN109193723B CN201811183660.2A CN201811183660A CN109193723B CN 109193723 B CN109193723 B CN 109193723B CN 201811183660 A CN201811183660 A CN 201811183660A CN 109193723 B CN109193723 B CN 109193723B
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power supply
energy storage
storage power
base station
battery
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CN109193723A (en
Inventor
李有财
刘震
汤平
陈木泉
熊刚
饶火美
陈见超
张涌才
高辉辉
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Fujian Nebula Electronics Co Ltd
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Fujian Nebula Electronics Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J13/0062—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/62—The condition being non-electrical, e.g. temperature
    • H02J2310/64—The condition being economic, e.g. tariff based load management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14—Energy storage units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Abstract

The invention provides a combined base station backup energy storage power supply, which comprises an HMI controller, a first CAN communication circuit, a voltage and current acquisition circuit and a plurality of direct current energy storage power supply modules, wherein the first CAN communication circuit is connected with the HMI controller; the voltage and current acquisition circuit is connected with the HMI controller through the first CAN communication circuit, and each direct-current energy storage power supply module is connected with the HMI controller through the first CAN communication circuit; each direct current energy storage power supply module is connected with a base station load. The invention also provides a control method of the combined type base station backup energy storage power supply. The invention has the advantages that: the capacity expansion of the battery can be realized by connecting the direct current energy storage power supply modules in parallel, the difficulty of capacity expansion is small, and the capacity of the battery can be adjusted according to the actual use requirement; meanwhile, the unified control of the backup energy storage power supply of the whole base station can be realized through communication between the cloud server and the HMI controller, and the management is very convenient.

Description

Combined base station backup energy storage power supply and control method
Technical Field
The invention relates to the field of communication, in particular to a combined type base station backup energy storage power supply and a control method.
Background
In all the current base stations, in order to ensure uninterrupted communication, a backup power supply is needed to supply power to the base stations besides the power supply through a power grid; the power grid is connected with an AC-DC converter to convert alternating current into direct current, and the AC-DC converter is connected with a base station load through a direct current bus, so that power supply to the base station is realized; the backup power supply is directly connected with the base station load, so that auxiliary power supply to the base station is realized; currently, the backup power supply of the base station mainly adopts a lead-acid battery or a lithium battery. Meanwhile, the nominal values of the existing base station power supplies are large and are basically tens of kilowatt-hours; when the power grid is used for supplying power to the base station, the power generation scale of the power plant is required to be larger than the power consumption scale when the power grid is in the power consumption peak period because the power grid has peak and valley divisions, otherwise, the condition of insufficient electric energy is caused, and in the condition, if the base station can supply power through a backup power supply, the condition of power shortage is greatly reduced; when the electric energy is in the low electricity consumption period, the inexhaustible electric energy is wasted, and in this case, if the surplus electric energy can be stored, the waste of the electric energy can be greatly reduced.
However, the existing base station backup power supply has the following drawbacks: 1. the backup power supply used by the existing base station only supports one battery pack, if the capacity is to be expanded, the capacity of a single battery pack and the power of the DC-DC converter can be increased, and the capacity expansion mode is high in technical difficulty and limited in expanded capacity; 2. each backup power supply of the existing base station is single network equipment, so that the control is not easy to carry out when the base station is used; 3. the backup power supply of the existing base station only has the backup power supply function, but does not have the distributed energy storage function, so that the peak clipping and valley filling control cannot be performed by matching with a power grid.
Disclosure of Invention
One of the technical problems to be solved by the invention is to provide a combined base station backup energy storage power supply, and the problems of large capacity expansion difficulty, difficult control and no distributed energy storage in the prior art can be effectively solved by the base station backup energy storage power supply.
The invention realizes one of the following technical problems: the base station backup energy storage power supply comprises an HMI controller, a first CAN communication circuit, a voltage and current acquisition circuit and a plurality of direct current energy storage power supply modules;
the voltage and current acquisition circuit is connected with the HMI controller through the first CAN communication circuit, and each direct-current energy storage power supply module is connected with the HMI controller through the first CAN communication circuit; each direct current energy storage power supply module is connected with a base station load.
Further, the base station backup energy storage power supply further comprises a DTU communication module and a cloud server; the cloud server is connected with the HMI controller through the DTU communication module.
Further, each direct current energy storage power supply module comprises a control main board, a second CAN communication circuit, a battery and a DC-DC converter; the control main board is connected with the HMI controller through the first CAN communication circuit; the battery and the DC-DC converter are connected with the control main board through the second CAN communication circuit; the battery is connected with the DC-DC converter, and the DC-DC converter is connected with a base station load.
Further, the control main board is an ARM control board.
The second technical problem to be solved by the invention is to provide a combined type base station backup energy storage power supply control method, by which the problems of large capacity expansion difficulty, difficult control and no distributed energy storage in the prior art can be effectively solved.
The invention realizes the second technical problem as follows: a control method of a combined base station backup energy storage power supply, the method needs to use the base station backup energy storage power supply, the method comprises the following steps:
setting a module ID for each direct current energy storage power supply module through the HMI controller, and simultaneously, distributing a channel for each direct current energy storage power supply module;
the HMI controller is communicated with the voltage and current acquisition circuit through the first CAN communication circuit, acquires data on the direct current bus in real time through the voltage and current acquisition circuit, and controls the DC-DC converters of the direct current energy storage power supply modules to charge the battery according to the set operation parameters when detecting that the direct current bus normally supplies power to the base station load; when the power failure of the direct current bus is detected, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery according to the set operation parameters.
Further, the method further comprises: peak clipping and valley filling control is carried out on a base station backup energy storage power supply by matching with a power grid, and the method specifically comprises the following steps:
when the energy storage power supply is in the flat electricity price period, the HMI controller controls the DC-DC converters of the direct-current energy storage power supply modules to stop charging and discharging the battery;
when the battery is in the valley period, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to charge the battery, and when the capacity of the battery is larger than the set first parameter SOC1, the HMI controller controls the DC-DC converter of the corresponding direct current energy storage power supply module to stop charging the battery;
when the battery is in the peak electricity price period, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery, and when the capacity of the battery is smaller than the set second parameter SOC2, the HMI controller controls the DC-DC converters of the corresponding direct current energy storage power supply modules to stop discharging the battery.
Further, the HMI controller controls the DC-DC converter of each direct current energy storage power supply module to charge the battery according to the set operation parameters includes:
the method for carrying out charge coordination control on the backup energy storage power supply of the base station and the AC-DC converter in the power grid specifically comprises the following steps:
maximum output current of AC-DC converter in electric network as an operation parameter I ADCMAX Setting into an HMI controller;
when the batteries in the direct-current energy storage power supply modules are charged, the HMI controller acquires the base station load current I in real time through the voltage and current acquisition circuit load ；
HMI controller according to I ADCMAX I load Calculating the maximum chargeable valueElectric current I maxcharge ，I maxcharge ＝I ADCMAX * First proportional coefficient-I load ；
HMI controller counts the number N of effective channels and calculates the average charging current value I chargeperchannal ,I chargeperchannal ＝I maxcharge N; meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel chargeperchannal The control main board is arranged for each direct-current energy storage power supply module;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I chargeperchannal And modifying the charging current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
Further, the HMI controller controlling the DC-DC converter of each direct current energy storage power supply module to discharge the battery according to the set operation parameters includes:
the method for carrying out discharge coordination control on the standby energy storage power supply of the base station specifically comprises the following steps:
HMI controller is through voltage current acquisition circuit real-time acquisition basic station load current I load ；
HMI controller counts the number M of effective channels and calculates the average discharge current I dischargeperchannal ，I dischargeperchannal ＝I load Second scaling factor; meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel dischargeperchannal The control main board is arranged for each direct-current energy storage power supply module;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I dischargeperchannal And modifying the discharge current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
Further, the method further comprises:
collecting data of each direct-current energy storage power supply module through an HMI controller, and calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data; wherein,
the step of collecting the data of each direct current energy storage power supply module through the HMI controller specifically comprises the following steps:
each control main board communicates with the corresponding battery through a second CAN communication circuit, and obtains relevant information of the corresponding battery in real time, wherein the relevant information comprises charge and discharge voltage information, battery capacity information and charge and discharge current information; each control main board communicates with the corresponding DC-DC converter through a second CAN communication circuit, and acquires relevant information of the corresponding DC-DC converter in real time, wherein the relevant information comprises running state information, charge-discharge voltage information and charge-discharge current information;
the HMI controller is respectively communicated with the control main board of each direct-current energy storage power supply module through the first CAN communication circuit, and relevant information of the battery and the DC-DC converter in each direct-current energy storage power supply module is obtained in real time;
the method for calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data specifically comprises the following steps:
adding the battery capacities of all the direct current energy storage power supply modules in the standby energy storage power supply of the base station to obtain total battery capacity, adding the battery capacities of all the direct current energy storage power supply modules of the effective channel in the standby energy storage power supply of the base station to obtain effective battery capacity, and dividing the effective battery capacity by the total battery capacity to obtain a residual capacity ratio;
adding current data of each direct current energy storage power supply module of an effective channel in the base station backup energy storage power supply to obtain a current value of the whole base station backup energy storage power supply;
and adding the voltage data of each direct current energy storage power supply module of the effective channel in the base station backup energy storage power supply, and taking an average value to obtain the voltage value of the base station backup energy storage power supply.
Further, the method further comprises:
the cloud server communicates with the HMI controller through the DTU communication module, and sets the operation parameters of each direct-current energy storage power supply module in the backup energy storage power supply of the base station through the cloud server, and the HMI controller sets the operation parameters into the control main board of each direct-current energy storage power supply module through the first CAN communication circuit; the cloud server acquires the operation data of each direct current energy storage power supply module in the backup energy storage power supply of the base station from the HMI controller in real time; meanwhile, when the backup energy storage power supply of the base station is abnormal, the HMI controller actively reports the abnormal information to the cloud server.
The invention has the following advantages: 1. when the device is specifically used, the capacity expansion of the battery can be realized in a mode of connecting the direct-current energy storage power supply modules in parallel, the capacity expansion difficulty is small, the capacity of the battery can be adjusted according to the actual use requirement, namely, if the capacity needs to be increased, the number of the direct-current energy storage power supply modules connected in parallel can be increased, and if the capacity needs to be reduced, the number of the direct-current energy storage power supply modules connected in parallel can be reduced, so that the device has strong flexibility; meanwhile, each direct-current energy storage power supply module can form a huge distributed energy storage power station after being connected in parallel, so that enough power supply support can be provided for the base station; 2. the unified control (including remote setting parameters, real-time acquisition of the running state and running data of the direct-current energy storage power supply module and the like) of the backup energy storage power supply of the whole base station can be realized through communication between the cloud server and the HMI controller, so that great convenience is brought to actual power supply management; 3. the peak clipping and valley filling control can be carried out by matching with the power grid, and each battery can be controlled to discharge the base station load in the peak electricity price period so as to reduce the electricity consumption of the base station load to the power grid; in the valley electricity price period, the power grid can be controlled to charge each battery, so that the load of the power grid in the peak electricity price period can be reduced, and huge economic value can be created by using the peak valley electricity price.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of a combined base station backup energy storage power supply according to the present invention.
Reference numerals illustrate:
100-base station backup energy storage power supply, 200-base station load, 300-power grid, 400-AC-DC converter, 500-DC bus, 1-HMI controller, 2-first CAN communication circuit, 3-voltage current acquisition circuit, 4-DC energy storage power supply module, 41-control main board, 411-ARM control board, 42-second CAN communication circuit, 43-battery, 44-DC-DC converter, 5-DTU communication module, 6-cloud server.
Detailed Description
Referring to fig. 1, a preferred embodiment of a combined base station backup energy storage power supply 100 according to the present invention is shown, wherein the base station backup energy storage power supply 100 includes an HMI controller 1, a first CAN communication circuit 2, a voltage and current acquisition circuit 3, and a plurality of dc energy storage power supply modules 4;
the voltage and current acquisition circuit 3 is connected with the HMI controller 1 through the first CAN communication circuit 2, and each direct-current energy storage power supply module 4 is connected with the HMI controller 1 through the first CAN communication circuit 2; each of the dc energy storage power modules 4 is connected to the base station load 200. In a specific implementation, the power grid 300 is connected to the AC-DC converter 400, and then the AC-DC converter 400 is connected to the base station load 200 through the DC bus 500, so as to realize power supply of the power grid to the base station load 200.
The HMI controller 1 is an HMI human-computer interaction terminal, the HMI controller 1 is a core control component of the invention and comprises control logic such as display, setting, communication control, AC/DC coordination strategy and the like, and the HMI controller 1 can be realized by adopting chips such as Weion TK8071iP, weion MT8051iP, di-text dmt106 and the like; the first CAN communication circuit 2 is mainly used for realizing the communication function between the voltage and current acquisition circuit 3 and the HMI controller 1 and between each direct current energy storage power supply module 4 and the HMI controller 1, and the first CAN communication circuit 2 CAN be realized by adopting a CTM1051 or an ADuM3201 chip; the voltage and current acquisition circuit 3 is mainly used for acquiring the base station load current and the bus voltage, so that the charging current can be calculated according to the acquired base station load current and whether the base station backup energy storage power supply 100 enters a backup mode can be judged according to the bus voltage, the voltage and current acquisition circuit 3 is a circuit which is commonly used in the prior art and is used for acquiring the current and the voltage, and when the voltage and current acquisition circuit 3 is implemented, only one circuit which can realize the current and voltage data acquisition function is selected randomly from the prior art, and an acquisition sensor related to the voltage and current acquisition circuit 3 can be a CSM1000S sensor or a VSM500D sensor.
The base station backup energy storage power supply 100 further comprises a DTU communication module 5 and a cloud server 6; the cloud server 6 is connected with the HMI controller 1 through the DTU communication module 5. The DTU communication module 5 is a communication interface between the HMI controller 1 and the cloud server 6, and is a wireless terminal device specifically configured to convert serial data into IP data or convert IP data into serial data and transmit the serial data through a wireless communication network, where in a specific implementation, the DTU communication module 5 may be a GPRSDTU wireless communication module, a 3GDTU wireless communication module, a 4GDTU wireless communication module, and other various wireless communication modules; the cloud server 6 is configured to remotely view operation data and operation states of the base station backup energy storage power supply 100, and may remotely set operation parameters.
Each direct current energy storage power supply module 4 comprises a control main board 41, a second CAN communication circuit 42, a battery 43 and a DC-DC converter 44; the control main board 41 is connected with the HMI controller 1 through the first CAN communication circuit 2; the battery 43 and the DC-DC converter 44 are connected to the control board 41 through the second CAN communication circuit 42; the battery 43 is connected to the DC-DC converter 44, and the DC-DC converter 44 is connected to the base station load 200. Wherein, the control main board 41 is a core control board in the direct current energy storage power supply module 4, and when in specific implementation, the operation logic, the protection logic, the communication control and the like in the module are realized by the control main board 41; the second CAN communication circuit 42 is mainly used for realizing the communication function between the DC-DC converter 44 and the control main board 41 and between the battery 43 and the control main board 44, and the second CAN communication circuit 42 CAN be realized by adopting a CTM1051 or an ADuM3201 chip; the battery 43 is used for realizing backup energy storage and supplying power to the base station load 200 when the power grid 300 is disconnected; the DC-DC converter 44 is a bi-directional power device, which can charge the battery, and also can feed back the energy discharge of the battery 43 to the power grid 300.
The control main board 41 is an ARM control board 411, and because the ARM control board 411 is a control board commonly used in a single chip microcomputer, in a specific implementation, only one of the existing ARM control boards needs to be selected at will, for example, an ARM control board manufactured by using TM4C1294, STM32F107, STM32F425, or other ARM chips can be adopted.
Referring to fig. 1, the method for controlling a backup energy storage power supply of a base station according to the present invention includes:
each direct-current energy storage power supply module is provided with a module ID through the HMI controller, and the purpose of the module ID is to facilitate the identification of each direct-current energy storage power supply module by the HMI controller; meanwhile, a channel is allocated to each direct current energy storage power supply module (specifically, the related configuration of the channel can be carried out on the HMI controller, the current channel number, channel parameters and the like are configured), after the channel is allocated to each direct current energy storage power supply module, if a certain direct current energy storage power supply module can normally input or output, the channel corresponding to the direct current energy storage power supply module is an effective channel; otherwise, if a certain dc energy-storage power module pauses (stops) input or output, the channel corresponding to the dc energy-storage power module is an invalid channel.
The HMI controller is communicated with the voltage and current acquisition circuit through the first CAN communication circuit, acquires data (comprising base station load current and bus voltage) on the direct current bus in real time through the voltage and current acquisition circuit, and controls the DC-DC converters of the direct current energy storage power supply modules to charge the battery according to set operation parameters when detecting that the direct current bus normally supplies power to the base station load; when the power failure of the direct current bus is detected, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery according to the set operation parameters, and even if the standby energy storage power supply of the base station enters a standby power mode, the base station is supported to work normally.
The method further comprises the steps of: peak clipping and valley filling control is carried out on a base station backup energy storage power supply by matching with a power grid, and the method specifically comprises the following steps:
when the base station is in the flat electricity price period, the HMI controller controls the DC-DC converters of the direct-current energy storage power supply modules to stop charging and discharging the battery, and the base station backup energy storage power supply is equivalent to a backup power supply in a static state;
when the battery is in the valley period, the HMI controller controls the DC-DC converters of the direct-current energy storage power supply modules to charge the battery, and when the capacity of the battery is charged to be larger than a set first parameter SOC1 (the first parameter SOC1 is a settable parameter and is usually larger than 90 percent), the HMI controller controls the DC-DC converters of the corresponding direct-current energy storage power supply modules to stop charging the battery;
when the battery is in the peak electricity price period, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery so as to reduce the electricity consumption of the base station load to the power grid, and when the capacity of the battery discharged is smaller than a set second parameter SOC2 (the second parameter SOC2 is the capacity required by a backup power supply and is usually larger than 50%), the HMI controller controls the DC-DC converters of the corresponding direct current energy storage power supply modules to stop discharging the battery.
Of course, in the implementation, joint debugging control can be performed on the base station backup energy storage power supply and the power grid according to the needs, which specifically comprises:
when heavy load occurs in the peak electricity price period of the power grid or the power grid is stable, the second parameter SOC2 is subjected to lowering treatment, so that some electric energy can be fed back to the base station load in the peak electricity price period, the power grid load can be effectively reduced, and the economic effect of the base station can be increased;
in the case of unstable power grid, the second parameter SOC2 is adjusted to be higher, so that the dc energy storage backup power supply can store more energy to cope with a worse power grid environment, for example, to prevent a long-time power failure.
The HMI controller controls the DC-DC converter of each direct current energy storage power supply module to charge the battery according to the set operation parameters, and the method comprises the following steps:
the method for carrying out charge coordination control on the backup energy storage power supply of the base station and the AC-DC converter in the power grid specifically comprises the following steps:
maximum output current of AC-DC converter in electric network (AC-DC converter in electric network)Maximum output current is limited) as an operating parameter I ADCMAX Setting into an HMI controller;
when the batteries in the direct-current energy storage power supply modules are charged, the HMI controller acquires the base station load current I in real time through the voltage and current acquisition circuit load ；
HMI controller according to I ADCMAX I load Calculating the maximum chargeable current I maxcharge ，I maxcharge ＝I ADCMAX * First proportional coefficient-I load (namely, the maximum output current of the AC-DC converter in the power grid is multiplied by a first proportional coefficient, and then the base station load current acquired in real time is subtracted); the first proportional coefficient is generally 90% to reserve a part of power margin, and can be modified according to actual requirements when the method is implemented;
the HMI controller counts the number N of effective channels (namely, the number of the DC energy storage power supply modules which can be normally input or output) and calculates the average charging current value I chargeperchannal ，I chargeperchannal ＝I maxcharge N (i.e., maximum chargeable current divided by the number of active channels); meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel chargeperchannal The control main board is arranged for each direct-current energy storage power supply module; for example, if the effective channel number N is 4 (including channel 1, channel 3, channel 4, and channel 6), then the average charging current value I is calculated chargeperchannal The HMI controller then sends I according to the module ID and channel 1, channel 3, channel 4, and channel 6 chargeperchannal The control main boards are respectively arranged on the corresponding direct-current energy storage power supply modules;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I chargeperchannal And modifying the charging current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
The HMI controller controls the DC-DC converter of each direct current energy storage power supply module to discharge the battery according to the set operation parameters, and the method comprises the following steps:
the method for carrying out discharge coordination control on the standby energy storage power supply of the base station specifically comprises the following steps:
HMI controller is through voltage current acquisition circuit real-time acquisition basic station load current I load ；
The HMI controller counts the number M of effective channels (i.e. the number of the DC energy storage power supply modules which can be normally input or output) and calculates the average discharge current I dischargeperchannal ，I dischargeperchannal ＝I load A second scaling factor (i.e. the base station load current divided by the number of effective channels and multiplied by the second scaling factor), wherein the second scaling factor is generally 60% to reserve a part of power headroom, and the second scaling factor can be modified according to actual requirements during implementation; meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel dischargeperchannal The control main board is arranged for each direct-current energy storage power supply module;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I dischargeperchannal And modifying the discharge current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
Because in the state of multiple batteries, if the electricity of the whole system is supplied from one battery, the individual batteries are likely to be discharged first, which is unfavorable for the stability of the whole system, and therefore, the whole system can be ensured to stably run by carrying out discharge coordination control on the backup energy storage power supply of the base station. Meanwhile, when the battery unbalance occurs in the standby energy storage power supply of the base station, the HMI controller can control the low-power channel to suspend output.
The method further comprises the steps of:
collecting data of each direct-current energy storage power supply module through an HMI controller, and calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data; wherein,
the step of collecting the data of each direct current energy storage power supply module through the HMI controller specifically comprises the following steps:
each control main board communicates with the corresponding battery through a second CAN communication circuit, and obtains relevant information of the corresponding battery in real time, wherein the relevant information comprises charge and discharge voltage information, battery capacity information and charge and discharge current information; each control main board communicates with the corresponding DC-DC converter through a second CAN communication circuit, and acquires relevant information of the corresponding DC-DC converter in real time, wherein the relevant information comprises running state information, charge-discharge voltage information and charge-discharge current information;
the HMI controller is respectively communicated with the control main board of each direct-current energy storage power supply module through the first CAN communication circuit, and relevant information of the battery and the DC-DC converter in each direct-current energy storage power supply module is obtained in real time;
in the implementation, after the HMI controller obtains the related information of the battery and the DC-DC converter in each DC energy storage power supply module, the HMI controller compares the charge-discharge voltage information of the battery in the same DC energy storage power supply module with the charge-discharge voltage information of the DC-DC converter, and if the difference between the charge-discharge voltage information and the charge-discharge voltage information is greater than a set allowable deviation value, determines that the connection between the DC-DC converter of the DC energy storage power supply module and the battery is abnormal, and at the moment, the HMI controller displays and prompts the abnormality.
The method for calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data specifically comprises the following steps:
adding the battery capacities of all the direct current energy storage power supply modules in the standby energy storage power supply of the base station to obtain total battery capacity, adding the battery capacities of all the direct current energy storage power supply modules of the effective channel in the standby energy storage power supply of the base station to obtain effective battery capacity, and dividing the effective battery capacity by the total battery capacity to obtain a residual capacity ratio;
adding current data of each direct current energy storage power supply module of an effective channel in the base station backup energy storage power supply to obtain a current value of the whole base station backup energy storage power supply;
and adding the voltage data of each direct current energy storage power supply module of the effective channel in the base station backup energy storage power supply, and taking an average value to obtain the voltage value of the base station backup energy storage power supply.
The method further comprises the steps of:
the cloud server communicates with the HMI controller through the DTU communication module, and sets the operation parameters of each direct current energy storage power supply module in the backup energy storage power supply of the base station (for example, sets a first parameter SOC1, sets a second parameter SOC2, sets a module ID, modifies peak sections, valley sections, flat section time and the like) through the cloud server, and the HMI controller respectively sets the operation parameters into the control main board of each direct current energy storage power supply module through the first CAN communication circuit; the cloud server acquires the operation data of each direct current energy storage power supply module in the backup energy storage power supply of the base station from the HMI controller in real time, and after acquiring the operation data of each direct current energy storage power supply module, the cloud server can display the operation data on a WEB end or a mobile phone end so as to facilitate operation and maintenance; meanwhile, when the backup energy storage power supply of the base station is abnormal, the HMI controller actively reports abnormal information to the cloud server, so that the quick response to the fault can be conveniently made.
In summary, the invention has the following advantages: 1. when the device is specifically used, the capacity expansion of the battery can be realized in a mode of connecting the direct-current energy storage power supply modules in parallel, the capacity expansion difficulty is small, the capacity of the battery can be adjusted according to the actual use requirement, namely, if the capacity needs to be increased, the number of the direct-current energy storage power supply modules connected in parallel can be increased, and if the capacity needs to be reduced, the number of the direct-current energy storage power supply modules connected in parallel can be reduced, so that the device has strong flexibility; meanwhile, each direct-current energy storage power supply module can form a huge distributed energy storage power station after being connected in parallel, so that enough power supply support can be provided for the base station; 2. the unified control (including remote setting parameters, real-time acquisition of the running state and running data of the direct-current energy storage power supply module and the like) of the backup energy storage power supply of the whole base station can be realized through communication between the cloud server and the HMI controller, so that great convenience is brought to actual power supply management; 3. the peak clipping and valley filling control can be carried out by matching with the power grid, and each battery can be controlled to discharge the base station load in the peak electricity price period so as to reduce the electricity consumption of the base station load to the power grid; in the valley electricity price period, the power grid can be controlled to charge each battery, so that the load of the power grid in the peak electricity price period can be reduced, and huge economic value can be created by using the peak valley electricity price.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.

Claims (4)

1. A combined base station backup energy storage power supply control method is characterized in that: the method comprises the following steps of using a combined base station backup energy storage power supply, wherein the combined base station backup energy storage power supply comprises an HMI controller, a first CAN communication circuit, a voltage and current acquisition circuit, a plurality of direct current energy storage power supply modules, a DTU communication module and a cloud server;
the voltage and current acquisition circuit is connected with the HMI controller through the first CAN communication circuit, and each direct-current energy storage power supply module is connected with the HMI controller through the first CAN communication circuit; each direct current energy storage power supply module is connected with a base station load; the cloud server is connected with the HMI controller through the DTU communication module;
each direct-current energy storage power supply module comprises a control main board, a second CAN communication circuit, a battery and a DC-DC converter; the control main board is connected with the HMI controller through the first CAN communication circuit; the battery and the DC-DC converter are connected with the control main board through the second CAN communication circuit; the battery is connected with the DC-DC converter, and the DC-DC converter is connected with a base station load; the control main board is an ARM control board;
the method comprises the following steps:
setting a module ID for each direct current energy storage power supply module through the HMI controller, and simultaneously, distributing a channel for each direct current energy storage power supply module;
the HMI controller is communicated with the voltage and current acquisition circuit through the first CAN communication circuit, acquires data on the direct current bus in real time through the voltage and current acquisition circuit, and controls the DC-DC converters of the direct current energy storage power supply modules to charge the battery according to the set operation parameters when detecting that the direct current bus normally supplies power to the base station load; when the power failure of the direct current bus is detected, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery according to the set operation parameters;
the method further comprises the steps of: peak clipping and valley filling control is carried out on a base station backup energy storage power supply by matching with a power grid, and the method specifically comprises the following steps:
when the energy storage power supply is in the flat electricity price period, the HMI controller controls the DC-DC converters of the direct-current energy storage power supply modules to stop charging and discharging the battery;
when the battery is in the valley period, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to charge the battery, and when the capacity of the battery is larger than the set first parameter SOC1, the HMI controller controls the DC-DC converter of the corresponding direct current energy storage power supply module to stop charging the battery;
when the battery is in the peak electricity price period, the HMI controller controls the DC-DC converters of the direct current energy storage power supply modules to discharge the battery, and when the capacity of the battery is smaller than the set second parameter SOC2, the HMI controller controls the DC-DC converters of the corresponding direct current energy storage power supply modules to stop discharging the battery;
the HMI controller controls the DC-DC converter of each direct current energy storage power supply module to charge the battery according to the set operation parameters, and the method comprises the following steps:
the method for carrying out charge coordination control on the backup energy storage power supply of the base station and the AC-DC converter in the power grid specifically comprises the following steps:
maximum output current of AC-DC converter in electric network as an operation parameter I ADCMAX Setting into an HMI controller;
when the batteries in the direct-current energy storage power supply modules are charged, the HMI controller acquires the base station load current I in real time through the voltage and current acquisition circuit load ；
HMI controller according to I ADCMAX I load Calculating the maximum chargeable current I maxcharge ，I maxcharge ＝I ADCMAX * First proportional coefficient-I load ；
HMI controller counts the number N of effective channels and calculates the average charging current value I chargeperchannal ,I chargeperchannal ＝I maxcharge N; meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel chargeperchannal The control main board is arranged for each direct-current energy storage power supply module;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I chargeperchannal And modifying the charging current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
2. The method for controlling a combined base station backup energy storage power supply according to claim 1, wherein the method comprises the following steps: the HMI controller controls the DC-DC converter of each direct current energy storage power supply module to discharge the battery according to the set operation parameters, and the method comprises the following steps:
the method for carrying out discharge coordination control on the standby energy storage power supply of the base station specifically comprises the following steps:
HMI controller is through voltage current acquisition circuit real-time acquisition basic station load current I load ；
HMI controller counts the number M of effective channels and calculates the average discharge current I dischargeperchannal ，I dischargeperchannal ＝I load Second scaling factor; meanwhile, the HMI controller calculates the average charging current value I according to the module ID and the channel dischargeperchannal The control main board is arranged for each direct-current energy storage power supply module;
the control main board of each direct current energy storage power supply module is used for controlling the power supply according to the received setting parameters I dischargeperchannal And modifying the discharge current of the DC-DC converter to the battery in each direct-current energy storage power supply module in real time.
3. The method for controlling a combined base station backup energy storage power supply according to claim 1, wherein the method comprises the following steps: the method further comprises the steps of:
collecting data of each direct-current energy storage power supply module through an HMI controller, and calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data; wherein,
the step of collecting the data of each direct current energy storage power supply module through the HMI controller specifically comprises the following steps:
each control main board communicates with the corresponding battery through a second CAN communication circuit, and obtains relevant information of the corresponding battery in real time, wherein the relevant information comprises charge and discharge voltage information, battery capacity information and charge and discharge current information; each control main board communicates with the corresponding DC-DC converter through a second CAN communication circuit, and acquires relevant information of the corresponding DC-DC converter in real time, wherein the relevant information comprises running state information, charge-discharge voltage information and charge-discharge current information;
the HMI controller is respectively communicated with the control main board of each direct-current energy storage power supply module through the first CAN communication circuit, and relevant information of the battery and the DC-DC converter in each direct-current energy storage power supply module is obtained in real time;
the method for calculating the residual capacity ratio, the current value and the voltage value of the backup energy storage power supply of the whole base station by utilizing the collected data specifically comprises the following steps:
adding the battery capacities of all the direct current energy storage power supply modules in the standby energy storage power supply of the base station to obtain total battery capacity, adding the battery capacities of all the direct current energy storage power supply modules of the effective channel in the standby energy storage power supply of the base station to obtain effective battery capacity, and dividing the effective battery capacity by the total battery capacity to obtain a residual capacity ratio;
adding current data of each direct current energy storage power supply module of an effective channel in the base station backup energy storage power supply to obtain a current value of the whole base station backup energy storage power supply;
and adding the voltage data of each direct current energy storage power supply module of the effective channel in the base station backup energy storage power supply, and taking an average value to obtain the voltage value of the base station backup energy storage power supply.
4. The method for controlling a combined base station backup energy storage power supply according to claim 1, wherein the method comprises the following steps: the method further comprises the steps of:
the cloud server communicates with the HMI controller through the DTU communication module, and sets the operation parameters of each direct-current energy storage power supply module in the backup energy storage power supply of the base station through the cloud server, and the HMI controller sets the operation parameters into the control main board of each direct-current energy storage power supply module through the first CAN communication circuit; the cloud server acquires the operation data of each direct current energy storage power supply module in the backup energy storage power supply of the base station from the HMI controller in real time; meanwhile, when the backup energy storage power supply of the base station is abnormal, the HMI controller actively reports the abnormal information to the cloud server.
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