CN111313397B - Energy control system and control method for communication base station hybrid power supply system - Google Patents

Energy control system and control method for communication base station hybrid power supply system Download PDF

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Publication number
CN111313397B
CN111313397B CN202010210873.0A CN202010210873A CN111313397B CN 111313397 B CN111313397 B CN 111313397B CN 202010210873 A CN202010210873 A CN 202010210873A CN 111313397 B CN111313397 B CN 111313397B
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power
load
battery
lead
lithium battery
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CN111313397A (en
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福尔康
张东升
樊苗
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Beijing Shoto Energy Storage Technology Co ltd
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Beijing Shoto Energy Storage Technology 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • 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
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02J7/36—Arrangements using end-cell switching
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application provides an energy control system and a control method for a communication base station hybrid power supply system, wherein the energy control system comprises a power grid, a diesel generator, a photovoltaic system, a lithium battery, a lead-acid battery and a main controller; the power grid and the diesel generator are both connected with an AC/DC rectifier through an automatic transfer switch, and the AC/DC rectifier is connected to a system direct-current bus; the diesel generator is connected with a system direct-current bus through a DC/DC converter; the photovoltaic system is connected with a system direct-current bus bar through the MPPT controller; the lithium battery and the lead-acid battery are connected with a system direct-current bus through a direct-current power flow distributor; the system direct-current busbar is connected with a load and used for supplying power to the load; and the main controller is used for realizing the overall operation control of the system and adjusting the output power of the lithium battery, the lead-acid battery and the diesel generator. The method and the device can reduce the running of the diesel engine, efficiently use the lithium battery, extract the residual electric quantity of the lead-acid battery and improve the power supply reliability.

Description

Energy control system and control method for communication base station hybrid power supply system
Technical Field
The application belongs to the technical field of energy management, and particularly relates to an energy control system and a control method for a communication base station hybrid power supply system.
Background
In recent years, a grid-connected or island-type base station hybrid power supply system is frequently deployed around the world due to flexible design and low cost. The primary task of system design is to optimally design the operation strategy of the system under the condition of considering the power supply condition of a power grid and the operation constraint of equipment, reduce the daily load operation cost to the maximum extent and keep the load reliably powered all day long. In order to enhance the reliability of the load power utilization of the base station and reduce the emission of carbon dioxide, more and more energy forms such as photovoltaic, wind power, diesel engine, battery and the like are added into the power supply system of the base station, and the control research of the hybrid power supply system is more and more important at present.
Due to the shortage of power generation, high fuel price and weak power grid infrastructure in the developing countries in south Asia and Africa, the role of the hybrid power system becomes more and more important, and the hybrid power system can be rapidly deployed by optimizing a control scheme, so that self-power supply of users is realized. With the development of the times, the power consumption of 4G/LTE/5G equipment in a communication base station is increasingly increased, and the critical power supply equipment of a telecommunication base station transceiver (BTS) needs to continuously operate continuously, so that a more reliable hybrid power supply system is needed to reduce the dependence on a power grid or a diesel generator when a power supply fails. The operation of the diesel engine aggravates the environmental pollution and occupies half of the expenditure in the operation cost of the base station. In addition, the electricity price of the weak area of the power grid changes along with the change, and the operation cost of the base station is increased. Under the background, a battery energy storage system can be added in the hybrid power supply system, and the running cost of the base station is saved to the maximum extent by balancing the running cost of renewable energy sources, a diesel engine and a battery.
At present, a lead-acid battery is generally used as a standby power supply in a base station power supply system, however, with the development of a lithium battery, the lithium battery is more suitable for a base station with high load demand due to the characteristics of high energy density and high rate discharge of the lithium battery, such as a 5G base station. After the existing base station is upgraded, the original lead-acid battery still has the residual service life, so in the process of upgrading and transforming the existing base station, a scheme shared by a lithium battery and the lead-acid battery is generally selected as a technical route for gradually replacing the lead-acid battery by the lithium battery, and meanwhile, the waste of the battery is reduced.
In view of the above application requirements, the inventor of the present application finds, in the research and development process, that a hybrid power supply system needs to design a new energy control system, and realizes optimal scheduling of renewable energy sources, a power grid, a diesel engine, a lithium battery, and a lead-acid battery, so as to achieve the goals of improving power supply reliability, reducing operation of the diesel engine, efficiently using the lithium battery, and extracting remaining power of the lead-acid battery.
Disclosure of Invention
To overcome at least some of the problems in the related art, the present application provides an energy control system and a control method for a hybrid power supply system of a communication base station.
According to a first aspect of embodiments of the present application, the present application provides an energy control system for a communication base station hybrid power supply system, which includes a photovoltaic system, a main controller, and a power grid, a diesel generator, an automatic transfer switch, an AC/DC rectifier, a DC/DC converter, an MPPT controller, a lithium battery, a lead-acid battery, a DC power flow distributor, and a load, which are connected to the main controller;
the power grid and the diesel generator are both connected with the AC/DC rectifier through the automatic change-over switch, and the AC/DC rectifier is connected to a system direct-current bus; the DC/DC converter is connected with the diesel generator and a system direct-current bus; the photovoltaic system is connected with the system direct-current busbar through the MPPT controller; the lithium battery and the lead-acid battery are connected with the system direct-current bus through the direct-current power flow distributor; the system direct-current busbar is connected with a load and used for supplying power to the load;
the main controller is used for realizing the overall operation control of the system, and adjusting the output power of the lithium battery, the lead-acid battery and the diesel generator and the on-off of the automatic change-over switch and each power supply branch circuit by monitoring the operation state of each device so as to realize the power supply of the load.
The energy control system for the communication base station hybrid power supply system further comprises a remote server, the main controller is communicated with the remote server through a router, the main controller transmits the running state of each device to the remote server in a remote mode, and the remote server is used for achieving multi-site monitoring.
According to a second aspect of the embodiments of the present application, there is also provided an energy control method for a communication base station hybrid power supply system, including the following steps:
judging whether the generating power of the photovoltaic system is greater than the load power;
if the generating power of the photovoltaic system is larger than the load power, controlling the photovoltaic system to supply power to the load, and charging the battery by using the extra power of the photovoltaic system after the generating power of the photovoltaic system meets the load power;
if the power generation power of the photovoltaic system is less than or equal to the load power, judging whether each voltage of the power grid is between 200V and 240V;
and if the voltages of the power grid are between 200V and 240V, controlling the photovoltaic system and the power grid to jointly supply power to the load, and charging the battery by using the extra power of the power required by the load.
In the energy control method for the communication base station hybrid power supply system, if the voltages of the power grid are not between 200V and 240V, the load is supplied with power by using the battery.
In the energy control method for the communication base station hybrid power supply system, if the diesel generator is started when the battery is charged, the main controller controls the diesel generator to stop operating.
In the above energy control method for a hybrid power supply system of a communication base station, the process of supplying power to the load by using the battery includes:
judging whether the SOC of the lithium battery is greater than a first preset value of the lithium battery;
if the SOC of the lithium battery is greater than the first preset value of the lithium battery, further judging whether the SOC of the lithium battery is less than a second preset value of the lithium battery; the first preset value of the lithium battery is smaller than the second preset value of the lithium battery;
if the SOC of the lithium battery is smaller than the second preset value of the lithium battery, starting the lead-acid battery, and supplying power to a load by the lead-acid battery until the SOC of the lithium battery reaches the minimum SOC of the lithium battery; otherwise, starting the photovoltaic system and the lithium battery, and supplying power to the load by the photovoltaic system and the lithium battery.
Further, the process of powering the load with the battery further includes:
if the SOC of the lithium battery is less than or equal to the first preset value of the lithium battery, further judging whether the SOC of the lead-acid battery is greater than the first preset value of the lead-acid battery;
if the SOC of the lead-acid battery is greater than the first preset value of the lead-acid battery, further judging whether the time used by the lead-acid battery for discharging the lead-acid battery is longer than the preset time or not when the SOC of the lead-acid battery is smaller than the second preset value of the lead-acid battery and the lead-acid battery is discharged until the photovoltaic system is available; the first preset value of the lead-acid battery is smaller than the second preset value of the lead-acid battery;
if the used time is longer than the preset time, starting the diesel generator, supplying power to the load by the diesel generator, and closing the diesel generator until all voltages of the power grid are between 200V and 240V; otherwise, the photovoltaic system and the lead-acid battery are started, and the photovoltaic system and the lead-acid battery jointly supply power to the load.
Further, the diesel generator charges the lithium battery while supplying power to the load until the SOC of the lithium battery reaches 50%.
Further, the process of powering the load with the battery further includes:
if the SOC of the lead-acid battery is smaller than or equal to the first preset value of the lead-acid battery, further judging whether the load power is smaller than the minimum set power of the diesel generator;
if the load power is less than the minimum set power of the diesel generator, setting the power of the diesel generator to be the minimum power, and supplying power to the load; charging the lithium battery by using the extra power meeting the load; otherwise, starting the diesel engine, and supplying power to the load by the diesel engine until all voltages of the power grid are between 200V and 240V or the voltage of the photovoltaic system is between 42V and 58V.
According to a third aspect of embodiments of the present application, there is also provided a computer storage medium including a computer program, where the computer program is executed by a processor to perform any one of the steps in the energy control method for a hybrid power supply system of a communication base station.
According to the above embodiments of the present application, at least the following advantages are obtained: the system is controlled to operate overall by the main controller, and power supply to loads is realized by monitoring the operating state of each device, adjusting the output power of the lithium battery, the lead-acid battery and the diesel generator, and switching on and off the automatic change-over switch and each power supply branch; by optimally scheduling renewable energy sources, a power grid, a diesel engine, a lithium battery and a lead-acid battery, the running of the diesel engine can be reduced, the lithium battery can be efficiently used, and the residual electric quantity of the lead-acid battery can be extracted, so that the power supply reliability is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification of the application, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of an energy control system for a hybrid power supply system of a communication base station according to an embodiment of the present disclosure.
Fig. 2 is a flowchart of an energy control method for a hybrid power supply system of a communication base station according to an embodiment of the present disclosure.
Fig. 3 is a second flowchart of an energy control method for a hybrid power supply system of a communication base station according to the embodiment of the present application.
Description of reference numerals:
1. a power grid; 2. a diesel generator; 3. ATS; 4. an AC/DC rectifier; 5. a DC/DC converter; 6. a photovoltaic system; 7. an MPPT controller; 8. a lithium battery; 9. a lead-acid battery; 10. a direct current power flow distributor; 11. a load; 12. a main controller; 13. a router; 14. a remote server.
Detailed Description
For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the present application, reference will now be made to the accompanying drawings and detailed description, wherein like reference numerals refer to like elements throughout.
The illustrative embodiments and descriptions of the present application are provided to explain the present application and not to limit the present application. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, "first," "second," …, etc., are not specifically intended to mean in a sequential or chronological order, nor are they intended to limit the application, but merely to distinguish between elements or operations described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. In general, the range of slight variations or errors that such terms modify may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.
Fig. 1 is a schematic structural diagram of an energy control system for a hybrid power supply system of a communication base station according to an embodiment of the present disclosure.
As shown in fig. 1, the energy management system for the communication base station hybrid Power supply system includes a Power grid 1, a diesel generator 2, an ATS3(Automatic Transfer Switching), an AC/DC rectifier 4, a DC/DC converter 5, a photovoltaic system 6, an MPPT (Maximum Power Point Tracking) controller 7, a lithium battery 8, a lead-acid battery 9, a DC Power flow distributor 10, a load 11, and a main controller 12.
The power grid 1 and the diesel generator 2 are both connected with the ATS3, and three-phase 220V alternating current output by the power grid 1 and the diesel generator 2 is converted into-48V direct current through the AC/DC rectifier 4 and then is connected to a system direct current busbar.
The DC/DC converter 5 is connected with the diesel generator 2 and is used for converting a direct current voltage of-48V into 12V and then providing starting power for the diesel generator 2.
The photovoltaic system 6 is connected with the MPPT controller 7, and the direct current output by the MPPT controller 7 is converted into-48V direct current through the MPPT controller and then is connected to a system direct current busbar.
The lithium battery 8 and the lead-acid battery 9 are both connected with the input end of the direct current power flow distributor 10, and the output end of the direct current power flow distributor 10 is connected with a system direct current busbar. The dc power flow distributor 10 can realize access of various types of batteries.
The system direct current busbar is connected with the load 11 and used for supplying power to the load 11.
The power grid 1, the diesel generator 2, the ATS3, the AC/DC rectifier 4, the DC/DC converter 5, the MPPT controller 7, the lithium battery 8, the lead-acid battery 9, the DC power flow distributor 10 and the load 11 are all connected with the main controller 12, the main controller 12 is used for realizing overall operation control of the system, and the continuous and reliable power supply of the load 11 is realized by monitoring the operation state of each device, adjusting the output power of the lithium battery 8, the lead-acid battery 9 and the diesel generator 2 and the on-off of the ATS3 and each power supply branch. The ATS3 is used to achieve automatic switching between the grid 1 and the diesel generator 2.
The load 11 includes a primary load, a secondary load, and a cooling or heating load.
The energy management system for the communication base station hybrid power supply system further comprises a remote server 14, the main controller 12 communicates with the remote server 14 through the router 13, the main controller 12 remotely transmits the operating state of each device to the remote server 14, and the remote server 14 is used for realizing multi-site monitoring.
Based on the energy management system for the communication base station hybrid power supply system, an embodiment of the present application further provides an energy control method for the communication base station hybrid power supply system, as shown in fig. 2, which includes the following steps:
and S1, judging whether the generated power of the photovoltaic system 6 is larger than the power of the load 11.
And S2, if the generated power of the photovoltaic system 6 is larger than the power of the load 11, the photovoltaic system 6 supplies power to the load 11, and the battery is charged by the additional power after the generated power of the photovoltaic system 6 meets the power of the load 11. The battery may be charged to its maximum SOC (State of charge). If the diesel generator 2 is started while the battery is being charged, the main controller 12 controls the diesel generator 2 to stop operating.
It should be noted that the batteries herein include a lithium battery 8 and a lead-acid battery 9, but may also include other available batteries.
And S3, if the generated power of the photovoltaic system 6 is less than or equal to the power of the load 11, judging whether each voltage of the power grid 1 is between 200V and 240V.
If the voltages of the power grid 1 are between 200V and 240V, the photovoltaic system 6 and the power grid 1 jointly supply power to the load 11, and the battery is charged by using the extra power of the power required by the load 11, so that the battery can be charged to the maximum SOC thereof. If the diesel generator 2 is started while the battery is being charged, the main controller 12 controls the diesel generator 2 to stop operating.
If the voltages of the power grid 1 are not between 200V and 240V, the load 11 is supplied with power by a battery.
As shown in fig. 3, when the load 11 is powered by a battery, the specific process is as follows:
s31, judging whether the SOC of the lithium battery 8 is larger than the first preset value SOC of the lithium batteryl1。
S32, if the SOC of the lithium battery 8 is larger than the first preset value SOC of the lithium batteryl1Then, whether the SOC of the lithium battery 8 is smaller than the second preset value SOC of the lithium battery is further determinedl2。
S33, if the SOC of the lithium battery 8 is less than the second preset value SOC of the lithium batteryl2If yes, starting the lead-acid battery 9, supplying power to the load 11 by the lead-acid battery 9 until the SOC of the lithium battery 8 reaches the minimum SOC, and returning to the step S31; otherwise, the photovoltaic system 6 and the lithium battery 8 are started, the load 11 is powered by the photovoltaic system 6 and the lithium battery 8, and then the step S31 is returned, if the diesel generator 2 is started, the main controller 12 controls the diesel generator 2 to stop running.
Wherein, the first preset value SOC of the lithium batteryl1Is less than the second preset value SOC of the lithium batteryl2First predetermined value SOC of lithium batteryl1Can be 20%, the second preset value SOC of the lithium batteryl2May be 30% each.
S34, if the SOC of the lithium battery 8 is less than or equal to the first preset value SOC of the lithium batteryl1Then, whether the SOC of the lead-acid battery 9 is larger than the first preset value SOC of the lead-acid battery is further judgedq1。
S35, if the SOC of the lead-acid battery 9 is larger than the first preset value SOC of the lead-acid batteryq1Further judging that the SOC of the lead-acid battery 9 is less than the second preset value SOC of the lead-acid batteryq2In the case of (2), the lead-acid battery 9 is discharged until the photovoltaic system 6 is available, the time taken being greater than the preset time t.
S36, if the used time is longer than the preset time t, starting the diesel generator 2, supplying power to the load 11 by the diesel generator 2 until each voltage of the power grid 1 is between 200V and 240V, closing the diesel generator 2, and returning to the step S31; otherwise, the photovoltaic system 6 and the lead-acid battery 9 are started, the photovoltaic system 6 and the lead-acid battery 9 jointly supply power to the load 11, and the step S31 is returned.
And judging whether the photovoltaic system 6 is available, namely judging whether the voltage of the photovoltaic system 6 is in the MPPT voltage range, wherein the MPPT voltage range is 42-58V.
Of lead-acid batteriesFirst preset value SOCq1Less than the second preset value SOC of the lead-acid batteryq2First predetermined value SOC of lithium batteryl1Can be 10%, the second preset value SOC of the lithium batteryl2May be 30% each.
In this case, the diesel generator 2 charges the lithium battery 8 while supplying power to the load 11 until the SOC of the lithium battery 8 reaches 50%.
S37, if the SOC of the lead-acid battery 9 is less than or equal to the first preset value SOC of the lead-acid batteryq1It is further determined whether the load 11 power is less than the minimum set power of the diesel generator 2.
S38, if the power of the load 11 is smaller than the minimum set power of the diesel generator 2, setting the power of the diesel generator 2 as the minimum power and supplying power to the load 11; charging the lithium battery 8 with the extra power after the load 11 is satisfied, and returning to step S31; otherwise, the diesel engine is started, the diesel engine supplies power to the load 11 until the voltages of the power grid 1 are between 200V and 240V or the voltage of the photovoltaic system 6 is within the MPPT voltage range, the MPPT voltage range is 42V to 58V, and the step S31 is returned.
In an exemplary embodiment, the present application further provides a computer storage medium, which is a computer readable storage medium, for example, a memory including a computer program, which is executable by a processor to perform the steps in the foregoing energy control method for a communication base station hybrid power supply system.
The embodiments of the present application described above may be implemented in various hardware, software code, or a combination of both. For example, the embodiments of the present application may also be program code for executing the above-described method in a data signal processor. The present application may also relate to various functions performed by a computer processor, digital signal processor, microprocessor, or field programmable gate array. The processor described above may be configured in accordance with the present application to perform certain tasks by executing machine-readable software code or firmware code that defines certain methods disclosed herein. Software code or firmware code may be developed in different programming languages and in different formats or forms. Software code may also be compiled for different target platforms. However, different code styles, types, and languages of software code and other types of configuration code for performing tasks according to the present application do not depart from the spirit and scope of the present application.
The foregoing is merely an illustrative embodiment of the present application, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present application shall fall within the protection scope of the present application.

Claims (5)

1. An energy control method for a communication base station hybrid power supply system is characterized by comprising the following steps:
judging whether the generating power of the photovoltaic system is greater than the load power;
if the generating power of the photovoltaic system is larger than the load power, controlling the photovoltaic system to supply power to the load, and charging the battery by using the extra power of the photovoltaic system after the generating power of the photovoltaic system meets the load power;
if the power generation power of the photovoltaic system is less than or equal to the load power, judging whether each voltage of the power grid is between 200V and 240V;
if the voltages of the power grid are between 200V and 240V, the photovoltaic system and the power grid are controlled to supply power to the load together, and the battery is charged by using the extra power of the power required by the load;
if the voltages of the power grid are not between 200V and 240V, the load is powered by the battery;
if the diesel generator is started when the battery is charged, the main controller controls the diesel generator to stop running;
the process of powering the load with the battery includes:
judging whether the SOC of the lithium battery is greater than a first preset value of the lithium battery;
if the SOC of the lithium battery is greater than the first preset value of the lithium battery, further judging whether the SOC of the lithium battery is less than a second preset value of the lithium battery; the first preset value of the lithium battery is smaller than the second preset value of the lithium battery;
if the SOC of the lithium battery is smaller than the second preset value of the lithium battery, starting the lead-acid battery, and supplying power to a load by the lead-acid battery until the SOC of the lithium battery reaches the minimum SOC of the lithium battery; otherwise, starting the photovoltaic system and the lithium battery, and supplying power to the load by the photovoltaic system and the lithium battery;
the process of powering the load with the battery further comprises:
if the SOC of the lead-acid battery is smaller than or equal to the first preset value of the lead-acid battery, further judging whether the load power is smaller than the minimum set power of the diesel generator;
if the load power is less than the minimum set power of the diesel generator, setting the power of the diesel generator to be the minimum power, and supplying power to the load; charging the lithium battery by using the extra power meeting the load; otherwise, starting the diesel engine, and supplying power to the load by the diesel engine until all voltages of the power grid are between 200V and 240V or the voltage of the photovoltaic system is between 42V and 58V.
2. The energy control method for the hybrid power supply system of the communication base station as set forth in claim 1, wherein the process of powering the load with the battery further comprises:
if the SOC of the lithium battery is less than or equal to the first preset value of the lithium battery, further judging whether the SOC of the lead-acid battery is greater than the first preset value of the lead-acid battery;
if the SOC of the lead-acid battery is greater than the first preset value of the lead-acid battery, further judging whether the time used by the lead-acid battery for discharging the lead-acid battery is longer than the preset time or not when the SOC of the lead-acid battery is smaller than the second preset value of the lead-acid battery and the lead-acid battery is discharged until the photovoltaic system is available; the first preset value of the lead-acid battery is smaller than the second preset value of the lead-acid battery;
if the used time is longer than the preset time, starting the diesel generator, supplying power to the load by the diesel generator, and closing the diesel generator until all voltages of the power grid are between 200V and 240V; otherwise, the photovoltaic system and the lead-acid battery are started, and the photovoltaic system and the lead-acid battery jointly supply power to the load.
3. The energy control method for a communication base station hybrid power supply system according to claim 1, wherein the diesel generator charges the lithium battery while supplying power to the load until the SOC of the lithium battery reaches 50%.
4. The energy control method for the hybrid power supply system of the communication base station as set forth in claim 1, wherein the process of powering the load with the battery further comprises:
if the SOC of the lead-acid battery is smaller than or equal to the first preset value of the lead-acid battery, further judging whether the load power is smaller than the minimum set power of the diesel generator;
if the load power is less than the minimum set power of the diesel generator, setting the power of the diesel generator to be the minimum power, and supplying power to the load; charging the lithium battery by using the extra power meeting the load; otherwise, starting the diesel engine, and supplying power to the load by the diesel engine until all voltages of the power grid are between 200V and 240V or the voltage of the photovoltaic system is between 42V and 58V.
5. A computer storage medium, characterized by comprising a computer program, which is executed by a processor to perform the steps of the method for controlling energy of a hybrid power supply system for a communication base station of any one of claims 1 to 4.
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