CN112018870A - Direct-current power supply backup storage battery pack discharging remote control system and method - Google Patents
Direct-current power supply backup storage battery pack discharging remote control system and method Download PDFInfo
- Publication number
- CN112018870A CN112018870A CN202010806277.9A CN202010806277A CN112018870A CN 112018870 A CN112018870 A CN 112018870A CN 202010806277 A CN202010806277 A CN 202010806277A CN 112018870 A CN112018870 A CN 112018870A
- Authority
- CN
- China
- Prior art keywords
- state
- battery pack
- storage battery
- backup storage
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J9/062—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 AC 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
-
- 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
-
- 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
- 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
-
- 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
- Y04S20/248—UPS systems or standby or emergency generators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Human Computer Interaction (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a direct-current power supply backup storage battery pack discharging remote control system and a method, which are used for controlling discharging of a backup storage battery pack arranged in a transformer substation, wherein the system comprises a control circuit corresponding to the backup storage battery pack, and the control circuit comprises a main controller, a feed network inverter and a tri-state charger capable of switching between three states of charging, discharging and floating charging; the invention upgrades the traditional manual field discharge mode into a remote control mode, realizes the regular safe nuclear capacity discharge and activation management, does not need to be operated on site, ensures that the storage battery is fully charged by charging before inversion discharge, ensures the real capacity of the battery to be close to, performs short-time pre-discharge by using the cooperation of a direct current load after the storage battery is fully charged, can restore the site by the short-time pre-discharge, and starts the backup storage battery to discharge to the alternating current load only after the short-time pre-discharge does not have discharge abnormity and is normally finished, thereby realizing the energy-saving inversion discharge.
Description
Technical Field
The invention relates to the field of power systems, in particular to a system and a method for remotely controlling discharge of a backup storage battery pack of a direct-current power supply.
Background
At present, a direct current Power Supply operation Power Supply, a communication Power Supply, a machine room UPS (Uninterruptible Power Supply), an energy storage Power station, a photovoltaic Power station, a communication base station and an electric automobile of a Power system all use a storage battery as a backup Power Supply system in a large amount. The storage battery as a backup power supply is in a floating charge state at ordinary times, and long-term floating charge causes the electrochemical substances in the storage battery to be crystallized, the internal resistance is increased, and the capacity and the practical service life of the battery are influenced according to the electrochemical characteristics of the storage battery. Therefore, the battery in the float state needs to be maintained at regular time such as discharge, nuclear capacity, activation, and the like. The regular discharge of the storage battery is completely manual operation, people are required to install a discharge machine device on site every time, complicated wiring and the like are needed, and the probability of serious safety production accidents such as storage battery short circuit, charging equipment burnout and the like caused by manual operation errors is increased. Meanwhile, the discharge time is long, the labor and time of testers are consumed on site, and the probability of artificially generating potential safety hazards is increased. In addition, the traditional artificial discharge equipment is a dummy load mainly comprising a heating resistor, the discharge process is as long as 10 hours, the whole process is consumed by heat energy, and energy is greatly wasted. Noise and heat also affect the field environment.
Disclosure of Invention
The invention aims to solve the technical problems that the existing manual site discharging operation wastes time and labor, the existing battery monitoring technology has many wires and is difficult to install and maintain, and the existing battery monitoring technology is very easy to cause production accidents and equipment damage, and provides a direct-current power supply backup storage battery discharging remote control system and a method.
The technical scheme adopted by the invention for solving the technical problems is as follows: the direct-current power supply backup storage battery pack discharging remote control system is used for controlling discharging of a backup storage battery pack arranged in a transformer substation, and comprises a control circuit corresponding to the backup storage battery pack, wherein the control circuit comprises a main controller, a feed network inverter and a tri-state charger capable of switching between a charging state, a discharging state and a floating charging state; the three-state charger is in a floating charging state under normal conditions, the input end of the three-state charger is connected with an alternating current power grid, the output end of the three-state charger is connected with a direct current bus, the control end of the three-state charger is connected with the main controller, the input end of the feed network inverter is connected with the backup storage battery pack, the output end of the feed network inverter is connected with the alternating current power grid, the control end of the feed network inverter is connected with the main controller, the backup storage battery pack is hung on the corresponding direct current bus, the main controller is also respectively connected with the backup storage battery pack and a server, direct current loads are hung on the direct;
the main controller is used for controlling the tri-state charger to switch from a floating charging state to a charging state until the backup storage battery pack is fully charged when receiving a discharging instruction sent by the server, then controlling the tri-state charger to switch to a discharging state so as to utilize the backup storage battery pack to pre-discharge the direct current load for a short time, controlling the feed network inverter to switch from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack after the short-time pre-discharge does not occur and is normally finished, controlling the feed network inverter to recover the standby state and control the tri-state charger to enter the charging state when the backup storage battery pack is discharged to a preset depth, and controlling the tri-state charger to recover to the floating charging state after the backup storage battery pack is fully charged.
Preferably, the control circuit further comprises a monitoring terminal, the monitoring terminal comprises a plurality of monitoring units, each monitoring unit is in carrier communication with the main controller through a power line, and each monitoring unit is connected with one battery in the backup storage battery pack and used for monitoring the state parameters of the connected battery in real time and transmitting the state parameters to the main controller through the carrier communication of the power line.
Preferably, the main controller is specifically configured to:
when a discharging instruction is received, the output voltage of the tri-state charger is increased to a charging state, and when the backup storage battery pack is fully charged, the output voltage of the tri-state charger is decreased to a floating charging state;
diagnosing the state of the backup storage battery pack and judging whether the backup storage battery pack meets the discharging prerequisite, if so, reducing the output voltage of the tri-state charger to a discharging state, performing short-time pre-discharging on the direct-current load by using the backup storage battery pack, and in the short-time pre-discharging process, if abnormal discharging occurs, increasing the voltage of the tri-state charger to a floating charging state, sending an alarm signal, and waiting for manual inspection and repair;
after the short-time pre-discharge is normally finished, controlling the feed network inverter to be changed from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack, controlling the feed network inverter to recover the standby state if discharge abnormity occurs in the inversion discharge process, simultaneously increasing the voltage of the tri-state charger to a floating charge state, sending an alarm signal, and waiting for manual inspection and repair;
when the backup storage battery pack discharges to a preset depth, controlling the feed network inverter to recover a standby state and increase the voltage of the tri-state charger to a charging state, and reducing the voltage of the tri-state charger to a floating charging state when the backup storage battery pack is fully charged;
the abnormal discharge refers to that the voltage of a single battery or the voltage of the backup storage battery pack is suddenly reduced to a cut-off voltage corresponding to the preset depth.
Preferably, the diagnosing the state of the backup battery pack and determining whether the backup battery pack satisfies a discharging prerequisite includes: and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, and judging that the discharging prerequisite condition is met if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value.
Preferably, the transformer substation comprises two backup storage battery packs, the system comprises two control circuits corresponding to the two backup storage battery packs, a direct-current bus of a first backup storage battery pack is connected with a direct-current bus of a second backup storage battery pack through a manual bus coupler switch, and the manual bus coupler switch is also connected with a controllable bus coupler switch in parallel;
the main controller is connected with the controllable bus coupler switch and is used for controlling the feed network inverter to be in a standby state and controlling the controllable bus coupler switch to be conducted at the same time when the voltage of the backup storage battery pack is monitored to be reduced to a fault voltage threshold value and the backup storage battery pack is subjected to an extreme open-circuit condition.
Preferably, the controllable bus coupler switch is a direct current contactor with a normally open auxiliary contact, the control circuit further includes a DCDC power module for providing a working voltage for a coil of the direct current contactor, an input end of the DCDC power module is connected to the direct current bus, an output end of the DCDC power module is connected to one pin of a first switching value interface of the main controller, another output end of the DCDC power module is connected to one end of the coil, another end of the coil is connected to another pin of the first switching value interface, a normally open main contact of the direct current contactor is connected to two ends of the manual bus coupler switch, and the normally open auxiliary contact of the direct current contactor is connected to two pins of a second switching value interface of the main controller;
the main controller realizes the drive control of the coil through the first switching value interface and detects whether the main contact is effectively closed or opened through the second switching value interface.
Preferably, the main controller is interconnected with the server through GPRS, WIFI or ethernet, and the main controller is further configured to upload data to the server; the main controller is connected with the feed network inverter and the tri-state charger through RS232/485, and is connected with the anode and the cathode of the backup storage battery pack through power line carrier communication;
the system further comprises a terminal capable of logging in through a common account or a management account, wherein the terminal logged in through the common account is used for accessing data of the server, the terminal logged in through the management account is used for accessing data of the server, authorizing operation of discharge parameter setting and issuing a discharge instruction, and the terminal comprises a PC terminal for accessing the server through a LAN and a mobile terminal for accessing the server through WIFI or GPRS;
the system further comprises a data set display, wherein the data set display is interconnected with the main controller through WIFI, RS232/485 or LAN and used for displaying battery state parameters and alarm information.
The invention also constructs a direct-current power supply backup storage battery pack discharging remote control system which is used for controlling discharging of a backup storage battery pack arranged in a transformer substation, and comprises a control circuit corresponding to the backup storage battery pack, wherein the control circuit comprises a main controller, a dummy load device and a tri-state charger capable of switching between three states of charging, discharging and floating charging; the three-state charger is usually in a floating charging state, the input end of the three-state charger is connected with an alternating current power grid, the output end of the three-state charger is connected with a direct current bus, the control end of the three-state charger is connected with the main controller, the input end of the dummy load equipment is connected with the backup storage battery pack, the control end of the dummy load equipment is connected with the main controller, the backup storage battery pack is hung on the corresponding direct current bus, the main controller is also connected with the backup storage battery pack and the server respectively, and the direct current bus is hung with a;
the main controller is used for controlling the tri-state charger to switch from a floating charging state to a charging state until the backup storage battery pack is fully charged when receiving a discharging instruction sent by the server, then controlling the tri-state charger to switch to a discharging state so as to utilize the backup storage battery pack to pre-discharge the direct current load for a short time, controlling the dummy load equipment to start working to discharge the backup storage battery pack after the short-time pre-discharge does not have discharging abnormity and is normally finished, controlling the dummy load equipment to stop working and controlling the tri-state charger to enter the charging state when the backup storage battery pack discharges to a preset depth, and controlling the tri-state charger to recover to the floating charging state after the backup storage battery pack is fully charged.
In another aspect of the present invention, a method for remotely controlling discharge of an ac load of a backup storage battery pack of a dc power supply is further configured, where the method is used in the foregoing system, and the method includes:
a pre-discharge charging step: when receiving a discharging instruction sent by a server, the main controller controls the tri-state charger to be switched from a floating charging state to a charging state until the backup storage battery pack is full;
pre-discharging: controlling the tri-state charger to be switched to a discharging state so as to utilize the backup storage battery pack to perform short-time pre-discharging on the direct-current load;
and (3) inversion discharging: when the short-time pre-discharge is not abnormal in discharge and is normally finished, controlling the feed network inverter to be switched from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack;
a charging step after discharging: and when the backup storage battery pack discharges to a preset depth, the feed network inverter is controlled to recover the standby state and the tri-state charger is controlled to enter the charging state, and after the backup storage battery pack is fully charged, the tri-state charger is controlled to recover to the floating charging state.
Preferably, the method further comprises: after the pre-discharge charging step is finished and before the pre-discharge step is entered, the following pre-discharge step is required;
a discharging prerequisite step: and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value, judging that the prerequisite condition of discharge is met, and if the prerequisite condition is met, executing the pre-discharge step.
The system and the method for remotely controlling the discharge of the backup storage battery pack of the direct-current power supply have the following beneficial effects: the invention upgrades the traditional manual on-site discharge mode into a remote control mode, thereby realizing the regular safe discharge activation management of the storage battery, only needing to send a discharge command remotely to realize automatic discharge without on-site operation, and before the inversion discharge, the invention firstly ensures the storage battery to be fully charged through charging, ensures the real capacity of the battery to be close to, and after being fully charged, firstly utilizes the cooperation of direct current load to carry out short-time pre-discharge, can restore the site through the short-time pre-discharge, and only after the short-time pre-discharge does not have discharge abnormity and is normally finished, the backup storage battery group is started to discharge to the alternating current load, thereby realizing the energy-saving inversion discharge.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a schematic structural diagram of a DC power backup battery pack discharge remote control system according to the present invention;
FIG. 2 is a schematic diagram of a host controller interface;
fig. 3 is a flow chart of the method for remotely controlling the discharge of the alternating current load of the backup storage battery pack of the direct current power supply.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named a second component, and similarly, a second component may also be named a first component, without departing from the scope of the present invention.
The general idea of the invention is as follows: the method comprises the steps of firstly fully charging, then pre-discharging in a short time, then reversely discharging and finally fully charging, and can upgrade the traditional manual site discharging mode into a remote control mode, thereby realizing the regular safe discharging and activating management of the storage battery.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.
Example one
Referring to fig. 1, the present embodiment uses a dc power backup battery pack discharge remote control system for performing discharge control on a backup battery pack provided in a substation. The discharging remote control system is applied to a DC110V dual-power dual-charging power system, and of course, may also be applied to backup power systems in other fields, such as uninterruptible power systems of data centers such as governments and railway systems, communication base station power supplies, EPS emergency power supplies, and the like, and may be used for remote discharging, checking and managing of backup power storage batteries in the above occasions.
Specifically, the DC110V dual-electric dual-charging power supply system includes two backup battery packs arranged in a substation, where the two backup battery packs are respectively mounted on corresponding DC110V DC buses, as shown in the figure, the battery pack 1 is connected to the I-section bus, and the battery pack 2 is connected to the II-section bus. Each direct current bus is hung with a direct current load. The I section of bus and the II section of bus are connected through a manual bus coupler switch 7, and a controllable bus coupler switch 6 is connected in parallel on the basis of the manual bus coupler switch 7.
Referring to fig. 1, the discharging remote control system includes a server 8, a terminal, and two control circuits corresponding to two backup secondary batteries, i.e., each secondary battery is provided with an independent control circuit.
The server 8 stores various operation parameter data uploaded by the control circuit, and the terminals comprise a PC terminal 9 accessing the server 8 through a LAN and a mobile terminal 10 accessing the server 8 through WIFI or GPRS. The user can log in the terminal through a common account or a management account, the terminal logged in through the common account only has the authority of accessing the data of the server 8, and the terminal logged in through the management account can access the data of the server 8 and also can authorize operation of discharge parameter setting and issue of a discharge instruction.
Since both of the control circuits are identical, only one of the control circuits will be described in detail below. The control circuit comprises a main controller 1, a feed network inverter 3, a tri-state charger 2, a monitoring terminal 4 and a data set display 5.
Referring to fig. 1, the main controller 1 and the server 8 are interconnected through GPRS, WIFI, or ethernet. The terminal logged in by the administrator account number issues a corresponding operation command to the main controller 1 through the server 8. The main controller 1 is connected with the anode and the cathode of the backup storage battery pack through power line carrier communication (PLC). Each main controller 1 is connected with the controllable bus coupler switch 6. The alternating current input end of the tri-state charger 2 is connected with an alternating current power grid, the direct current output end of the tri-state charger is connected with a direct current bus, and the control end of the tri-state charger is connected with the main controller 1. The input end of the feed network inverter 3 is connected with the backup storage battery pack, the output end of the feed network inverter 3 is connected with the alternating current power grid, and the control end of the feed network inverter is connected with the main controller 1. And an alternating current load is hung on the alternating current power grid.
Referring to fig. 2, specifically, the main controller 1 has two RS232/485 serial communication interfaces COM1 and COM2, a WIFI/GPRS module, one ethernet communication LAN interface, a first switching value interface and a second switching value interface (the switching value interface has two pins, one is in and the other is out, and a relay switch is arranged inside the switching value interface), and a PLC carrier communication interface. The PLC carrier communication interface is connected with the anode and the cathode of the storage battery pack, so that the main controller 1 can monitor parameters such as total voltage, total current and the like of the storage battery pack. And the serial port COM1 is connected with the serial port of the tri-state charger 2 to realize the switching control of the working state and the reading of the state parameters. The serial port COM2 is connected with the serial port of the feed network inverter 3, so that the switching control of the working state and the reading of the running state data are realized.
In this embodiment, the controllable bus coupler switch 6 is a direct current contactor with a normally open auxiliary contact, the rated current DC100A, the coil voltage DC24V, and the main contact is normally open, and the main contact and the manual bus coupler switch 7 form a parallel structure and are connected into two segments of direct current buses. Correspondingly, the control circuit further comprises a DCDC power module 8 for supplying an operating voltage to the coil of the DC contactor, and the DCDC power module 819 is an input DC110V and an output DC 24V. The input of DCDC power module 8 is connected direct current bus, an output of DCDC power module 8 is connected a pin of main control unit 1's first switching value interface, another output of DCDC power module 8 is connected the one end of coil, the other end of coil is connected another pin of first switching value interface, direct current contactor's normally open main contact with manual female gang switch 7 both ends are connected, direct current contactor's normally open auxiliary contact with two pins of main control unit 1's second switching value interface are connected. The main controller 1 realizes the driving control of the coil through the first switching value interface, and detects whether the main contact is effectively closed or opened through the second switching value interface.
In this embodiment, the three states of the tri-state charger 2 are a charging state, a floating charging state and a discharging state, respectively, and the main controller 1 controls the difference of the output voltages of the tri-state charger 2 through communication of the serial port COM1, the output voltage of the charging state of the tri-state charger 2 is greater than the voltage of the storage battery pack, the output voltage of the discharging state is less than the voltage of the storage battery pack and no current is output at the time, the output voltage of the floating charging state is substantially constant, only higher than the terminal voltage of the storage battery pack, and normally, the tri-state charger 2 is in the floating charging state. Specifically, in this embodiment, the output voltage of the tri-state charger 2 in the charging state is 124.2V, the output voltage of the tri-state charger 2 in the floating charging state is 121.5V, the output voltage of the tri-state charger 2 in the discharging state is 102.6V, and no current is output, which is also called a zero current output state, which may also be called a zero power output state.
In this embodiment, the feed network inverter 3 has a DC input rated voltage DC110V, a range DC 98V-DC 143V, an AC output rated voltage AC220V, a range AC 198V-AC 286V, and an output power 3000VA, referring to fig. 2, a control serial port of the feed network inverter 3 is communicated with a serial port COM2 of the main controller 1 through RS232/485, so as to realize switching control of the main controller 1 on the working state of the feed network inverter 3 and reading of the running state data.
In this embodiment, the monitoring terminal 4 includes a plurality of monitoring units, each monitoring unit communicates with the main controller 1 through power line carrier, and each monitoring unit is connected to one battery in the backup storage battery pack, and is configured to monitor a state parameter of the connected battery in real time, and transmit the state parameter to the main controller 1 through power line carrier communication. The state parameters comprise the voltage, the ohm internal resistance, the polarization capacitance, the charge quantity, the electrode temperature of the accumulator body and the like.
In this embodiment, the data set display 5 is interconnected with the main controller 1 through WIFI, RS232/485 or LAN, and is configured to display battery status parameters, alarm information, and the like.
In the invention, when remote discharging is required, after logging in a terminal through a management account, a specific main controller 1 is selected to send a discharging instruction, a server 8 sends the discharging instruction to a corresponding main controller 1, when the main controller 1 receives the discharging instruction sent by the server 8, the tri-state charger 2 is controlled to be switched from a floating charging state to a charging state until a backup storage battery pack is full, then the tri-state charger 2 is controlled to be switched to a discharging state so as to carry out short-time pre-discharging on a direct current load by using the backup storage battery pack, after the short-time pre-discharging does not have discharging abnormity and is normally finished, the feed network inverter 3 is controlled to be switched from a standby state to a working state so as to carry out inversion discharging on the backup storage battery pack, and when the backup storage battery pack discharges to a preset depth, the feed network inverter 3 is controlled to recover the standby state and the tri-state, and after the backup storage battery pack is full of the battery pack, the tri-state charger 2 is controlled to be restored to a floating charging state.
Specifically, the remote discharging process of the present embodiment is:
1) a terminal logged in by an administrator account number issues a discharging command to the main controller 1 through the server 8, the main controller 1 receives a discharging command, increases the output voltage of the tri-state charger 2 to a charging state, and decreases the output voltage of the tri-state charger 2 to a floating charging state when the backup storage battery pack is fully charged;
the full capacity of the storage battery is ensured mainly by full charge, and the state parameters of each battery are monitored in real time by the charging process monitoring terminal 4.
2) Diagnosing the state of the backup storage battery pack and judging whether the backup storage battery pack meets the discharging prerequisite condition, if so, reducing the output voltage of the tri-state charger 2 to a discharging state, performing short-time pre-discharging on the direct current load by using the backup storage battery pack, and in the short-time pre-discharging process, if abnormal discharging occurs, increasing the voltage of the tri-state charger 2 to a floating charging state, and if the abnormal discharging occurs, not executing subsequent steps, sending an alarm signal to display the storage battery pack fault and waiting for manual inspection and repair;
the abnormal discharge refers to that the voltage of a single battery or the voltage of the backup storage battery pack is suddenly reduced to a cut-off voltage corresponding to the preset depth, and the temperature of the single battery exceeds a maximum temperature threshold. For example, the preset depth is 90%, for a 2V battery, the cut-off voltage of a single battery is 1.8V, the cut-off voltage value of a backup battery pack is the number of battery sections multiplied by 1.8V, and the maximum threshold value of the temperature of the single battery is 50 ℃.
The diagnosing the state of the backup storage battery pack and judging whether the backup storage battery pack meets the discharging prerequisite condition comprises the following steps: and evaluating the state of health of each battery after full charge according to the monitored state parameters of each battery, and if the state of health of each battery after full charge is lower than a preset value, such as 70%, and the internal resistance value of each battery does not exceed a preset proportion, such as 50%, of a nominal value, judging that the discharge prerequisite condition is met.
The health state is obtained by measuring internal resistances of the batteries with different health levels under full charge through experiments in advance, establishing a corresponding table of the health state and the internal resistances, and fitting a curve. Therefore, when the state parameters of the battery are monitored, the corresponding health state can be found according to the curve only according to the internal resistance value in the state parameters.
In addition, when the remaining capacity and the state of health of the battery pack are evaluated, the remaining capacity and the state of health of the battery with the worst state of health can be used as the remaining capacity and the state of health of the backup battery pack.
3) After the short-time pre-discharge is normally finished, the feed network inverter 3 is controlled to be changed from a standby state to a working state, the backup storage battery pack is subjected to inversion discharge, in the inversion discharge process, if discharge abnormity occurs, the feed network inverter is controlled to recover the standby state, meanwhile, the voltage of the tri-state charger 2 is increased to a floating charge state, subsequent steps are not executed, an alarm signal is sent out to display the storage battery pack fault, and manual inspection and repair are waited;
it will be appreciated that in this step, the local dc loads continue to participate in the consumer discharge. In addition, in the discharging processes of 2) and 3), the main controller 1 monitors the total voltage and the discharging current of the storage battery pack and the output state of the feed network inverter 3, and the monitoring terminal 4 monitors the state parameters of each battery, so that parameters such as switching and inversion efficiency of the feed network inverter 3 can be detected while inverting and discharging, the purpose of detecting the performance of the inverter in time is achieved, and potential safety power supply hazards of a backup power supply system caused by the inverter with a fault are prevented.
4) And when the backup storage battery pack discharges to a preset depth, controlling the feed network inverter 3 to recover a standby state and increase the voltage of the tri-state charger 2 to a charging state, and decreasing the voltage of the tri-state charger 2 to a floating charging state when the backup storage battery pack is fully charged.
In the charging process, the monitoring terminal 4 monitors the state parameters of each battery in real time, if voltage exists and the temperature is abnormal, the main controller 1 controls the tri-state charger 2 to be switched to a floating charging state and immediately gives an alarm.
Preferably, in the above steps 1) -4), if it is monitored that the voltage of the backup storage battery pack falls to a fault voltage threshold (for example, DC99V) and the backup storage battery pack has an extreme open-circuit condition (that is, current is zero and the entire battery pack is under no-voltage), the main controller 1 controls the feed network inverter 3 to be in a standby state and controls the controllable bus tie switch 6 to be on, for example, a relay inside a first switching value interface of the main controller 1 is closed, a coil is powered on, a main contact and an auxiliary contact are both closed, the main controller 1 monitors the state of the auxiliary contact, only the auxiliary contact is in a closed state, the entire controllable bus tie is regarded as closed, a second storage battery pack is started, the charger voltage is adjusted to a floating charge state and gives an alarm, and after the fault is manually relieved, the main controller 1 sends a control signal to disconnect the main contact, and recovering the storage battery pack to a normal working state.
The embodiment has the following beneficial effects: the traditional manual on-site discharging mode is upgraded to a remote control mode, so that the regular safe discharging and activating management of the storage battery is realized, automatic discharging can be realized only by remotely sending a discharging instruction without on-site operation, the storage battery is fully charged by charging before inversion discharging, the real capacity of the battery is ensured to be close to, after the storage battery is fully charged, short-time pre-discharging is carried out by using the cooperation of a direct current load, the site can be restored by the short-time pre-discharging, the backup storage battery group is discharged to the alternating current load only after the short-time pre-discharging does not have discharging abnormity and is normally finished, and the inversion discharging has the advantages of converting the electric energy of the storage battery into alternating current for use, saving energy and protecting the environment.
Example two
The dc power backup battery pack discharging remote control system of the present embodiment is different from the first embodiment in that the grid feeding inverter 3 of the first embodiment is eliminated, and a dummy load device is added. The input end of the dummy load equipment is connected with the backup storage battery pack, and the control end of the dummy load equipment is connected with the main controller 1. The working principle of the whole system is basically the same as that of the first embodiment, and the only difference is that the main controller 1 controls the dummy load device to start working to discharge by using the backup storage battery pack after the short-time pre-discharge does not have discharge abnormality and is normally finished. That is, after the power is prevented for a short time, unlike the first embodiment in which the feed network inverter 3 is used for inverting and discharging, the dummy load device is used for consuming power, and the dummy load device mainly consumes the power of the battery pack directly by a resistance heating method.
EXAMPLE III
Referring to fig. 3, a method for remotely controlling discharge of an ac load of a dc power backup battery pack according to the present embodiment is applied to a system according to the first embodiment, and the method includes:
s301: a pre-discharge charging step;
when receiving a discharging instruction sent by a server 8, the main controller 1 controls the tri-state charger 2 to be switched from a floating charging state to a charging state until the backup storage battery pack is full;
s302: a discharging prerequisite step:
and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value, judging that the prerequisite condition of discharge is met, and if the prerequisite condition is met, executing the pre-discharge step S303.
The diagnosing the state of the backup storage battery pack and judging whether the backup storage battery pack meets the discharging prerequisite condition comprises the following steps: and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, and judging that the discharging prerequisite condition is met if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value.
S303: pre-discharging;
controlling the tri-state charger 2 to be switched to a discharging state so as to utilize the backup storage battery pack to perform short-time pre-discharging on the direct-current load;
s304: performing inversion discharging;
after the short-time pre-discharge is not abnormal in discharge and is normally finished, controlling the feed network inverter 3 to be switched from a standby state to a working state so as to utilize the backup storage battery group to perform inversion discharge on the alternating current load;
s305: a step of charging after discharging;
and when the backup storage battery pack discharges to a preset depth, the feed network inverter 3 is controlled to recover the standby state and the tri-state charger 2 is controlled to enter the charging state, and after the backup storage battery pack is fully charged, the tri-state charger 2 is controlled to recover the floating charging state.
Preferably, the method further comprises: in any one of the above steps, if the main controller 1 monitors that the voltage of the backup storage battery pack is reduced to the fault voltage threshold value and the backup storage battery pack has an extreme open-circuit condition, the feed network inverter 3 is controlled to be in a standby state, and meanwhile, the controllable bus tie switch 6 is controlled to be switched on.
For more details, reference may be made to a part of the above embodiments, which are not described herein again.
It is to be understood that the terms "equal," "same," "simultaneous," and the like, as used herein, are not to be construed as limited to the absolute terms of equality or equality, but rather are to be construed in an engineering sense to cover all aspects of the invention as fairly set out in the attached claims. The word "connected" or "connecting" is intended to encompass not only the direct connection of two entities, but also the indirect connection via other entities with beneficial and improved effects.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A direct-current power supply backup storage battery pack discharge remote control system is used for controlling discharge of a backup storage battery pack arranged in a transformer substation, and is characterized by comprising a control circuit corresponding to the backup storage battery pack, wherein the control circuit comprises a main controller, a feed network inverter and a tri-state charger capable of switching between three states of charging, discharging and floating charging; the three-state charger is in a floating charging state under normal conditions, the input end of the three-state charger is connected with an alternating current power grid, the output end of the three-state charger is connected with a direct current bus, the control end of the three-state charger is connected with the main controller, the input end of the feed network inverter is connected with the backup storage battery pack, the output end of the feed network inverter is connected with the alternating current power grid, the control end of the feed network inverter is connected with the main controller, the backup storage battery pack is hung on the corresponding direct current bus, the main controller is also respectively connected with the backup storage battery pack and a server, direct current loads are hung on the direct;
the main controller is used for controlling the tri-state charger to switch from a floating charging state to a charging state until the backup storage battery pack is fully charged when receiving a discharging instruction sent by the server, then controlling the tri-state charger to switch to a discharging state so as to utilize the backup storage battery pack to pre-discharge the direct current load for a short time, controlling the feed network inverter to switch from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack after the short-time pre-discharge does not occur and is normally finished, controlling the feed network inverter to recover the standby state and control the tri-state charger to enter the charging state when the backup storage battery pack is discharged to a preset depth, and controlling the tri-state charger to recover to the floating charging state after the backup storage battery pack is fully charged.
2. The system according to claim 1, wherein the control circuit further comprises a monitoring terminal, the monitoring terminal comprises a plurality of monitoring units, each monitoring unit is in communication with the main controller through power line carrier, and each monitoring unit is connected with one battery in the backup storage battery pack, and is used for monitoring the state parameters of the connected battery in real time and transmitting the state parameters to the main controller through power line carrier communication.
3. The dc power supply backup battery pack discharging remote control system according to claim 1 or 2, wherein the main controller is specifically configured to:
when a discharging instruction is received, the output voltage of the tri-state charger is increased to a charging state, and when the backup storage battery pack is fully charged, the output voltage of the tri-state charger is decreased to a floating charging state;
diagnosing the state of the backup storage battery pack and judging whether the backup storage battery pack meets the discharging prerequisite, if so, reducing the output voltage of the tri-state charger to a discharging state, performing short-time pre-discharging on the direct-current load by using the backup storage battery pack, and in the short-time pre-discharging process, if abnormal discharging occurs, increasing the voltage of the tri-state charger to a floating charging state, sending an alarm signal, and waiting for manual inspection and repair;
after the short-time pre-discharge is normally finished, controlling the feed network inverter to be changed from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack, controlling the feed network inverter to recover the standby state if discharge abnormity occurs in the inversion discharge process, simultaneously increasing the voltage of the tri-state charger to a floating charge state, sending an alarm signal, and waiting for manual inspection and repair;
when the backup storage battery pack discharges to a preset depth, controlling the feed network inverter to recover a standby state and increase the voltage of the tri-state charger to a charging state, and reducing the voltage of the tri-state charger to a floating charging state when the backup storage battery pack is fully charged;
the abnormal discharge refers to that the voltage of a single battery or the voltage of the backup storage battery pack is suddenly reduced to a cut-off voltage corresponding to the preset depth.
4. The dc power supply backup battery pack discharge remote control system according to claim 3, wherein said diagnosing the status of said backup battery pack and determining whether said backup battery pack satisfies the discharge prerequisites comprises: and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, and judging that the discharging prerequisite condition is met if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value.
5. The direct-current power supply backup storage battery pack discharging remote control system according to claim 1 or 2, wherein the transformer substation comprises two backup storage battery packs, the system comprises two control circuits corresponding to the two backup storage battery packs, a direct-current bus of a first backup storage battery pack is connected with a direct-current bus of a second backup storage battery pack through a manual bus coupler switch, and the manual bus coupler switch is further connected with a controllable bus coupler switch in parallel;
the main controller is connected with the controllable bus coupler switch and is used for controlling the feed network inverter to be in a standby state and controlling the controllable bus coupler switch to be conducted at the same time when the voltage of the backup storage battery pack is monitored to be reduced to a fault voltage threshold value and the backup storage battery pack is subjected to an extreme open-circuit condition.
6. The DC power supply backup battery pack discharging remote control system according to claim 5, it is characterized in that the controllable bus coupler switch is a direct current contactor with a normally open auxiliary contact, the control circuit further comprises a DCDC power supply module used for providing working voltage for a coil of the direct current contactor, the input end of the DCDC power supply module is connected with the direct current bus, one output end of the DCDC power supply module is connected with one pin of a first switching value interface of the main controller, the other output end of the DCDC power supply module is connected with one end of the coil, the other end of the coil is connected with the other pin of the first switching value interface, a normally open main contact of the direct current contactor is connected with two ends of the manual bus coupler switch, and a normally open auxiliary contact of the direct current contactor is connected with two pins of a second switching value interface of the main controller;
the main controller realizes the drive control of the coil through the first switching value interface and detects whether the main contact is effectively closed or opened through the second switching value interface.
7. The direct current power supply backup storage battery pack discharging remote control system according to claim 1 or 2, wherein the main controller is interconnected with the server through GPRS, WIFI or ethernet, and is further configured to upload data to the server; the main controller is connected with the feed network inverter and the tri-state charger through RS232/485, and is connected with the anode and the cathode of the backup storage battery pack through power line carrier communication;
the system further comprises a terminal capable of logging in through a common account or a management account, wherein the terminal logged in through the common account is used for accessing data of the server, the terminal logged in through the management account is used for accessing data of the server, authorizing operation of discharge parameter setting and issuing a discharge instruction, and the terminal comprises a PC terminal for accessing the server through a LAN and a mobile terminal for accessing the server through WIFI or GPRS;
the system further comprises a data set display, wherein the data set display is interconnected with the main controller through WIFI, RS232/485 or LAN and used for displaying battery state parameters and alarm information.
8. A direct-current power supply backup storage battery pack discharging remote control system is used for controlling discharging of a backup storage battery pack arranged in a transformer substation, and is characterized by comprising a control circuit corresponding to the backup storage battery pack, wherein the control circuit comprises a main controller, dummy load equipment and a tri-state charger capable of switching between three states of charging, discharging and floating charging; the three-state charger is usually in a floating charging state, the input end of the three-state charger is connected with an alternating current power grid, the output end of the three-state charger is connected with a direct current bus, the control end of the three-state charger is connected with the main controller, the input end of the dummy load equipment is connected with the backup storage battery pack, the control end of the dummy load equipment is connected with the main controller, the backup storage battery pack is hung on the corresponding direct current bus, the main controller is also connected with the backup storage battery pack and the server respectively, and the direct current bus is hung with a;
the main controller is used for controlling the tri-state charger to switch from a floating charging state to a charging state until the backup storage battery pack is fully charged when receiving a discharging instruction sent by the server, then controlling the tri-state charger to switch to a discharging state so as to utilize the backup storage battery pack to pre-discharge the direct current load for a short time, controlling the dummy load equipment to start working to discharge the backup storage battery pack after the short-time pre-discharge does not have discharging abnormity and is normally finished, controlling the dummy load equipment to stop working and controlling the tri-state charger to enter the charging state when the backup storage battery pack discharges to a preset depth, and controlling the tri-state charger to recover to the floating charging state after the backup storage battery pack is fully charged.
9. A method for remote control of discharge of an ac load on a backup battery pack of a dc power source, for use in the system of claim 1, the method comprising:
a pre-discharge charging step: when receiving a discharging instruction sent by a server, the main controller controls the tri-state charger to be switched from a floating charging state to a charging state until the backup storage battery pack is full;
pre-discharging: controlling the tri-state charger to be switched to a discharging state so as to utilize the backup storage battery pack to perform short-time pre-discharging on the direct-current load;
and (3) inversion discharging: when the short-time pre-discharge is not abnormal in discharge and is normally finished, controlling the feed network inverter to be switched from a standby state to a working state so as to perform inversion discharge on the backup storage battery pack;
a charging step after discharging: and when the backup storage battery pack discharges to a preset depth, the feed network inverter is controlled to recover the standby state and the tri-state charger is controlled to enter the charging state, and after the backup storage battery pack is fully charged, the tri-state charger is controlled to recover to the floating charging state.
10. The method of claim 9, further comprising the step of: after the pre-discharge charging step is finished and before the pre-discharge step is entered, the following pre-discharge step is required;
a discharging prerequisite step: and evaluating the health state of each battery after full charge according to the monitored state parameters of each battery, if the health state after full charge is lower than a preset value and the internal resistance value of the battery does not exceed the preset proportion of a nominal value, judging that the prerequisite condition of discharge is met, and if the prerequisite condition is met, executing the pre-discharge step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806277.9A CN112018870A (en) | 2020-08-11 | 2020-08-11 | Direct-current power supply backup storage battery pack discharging remote control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806277.9A CN112018870A (en) | 2020-08-11 | 2020-08-11 | Direct-current power supply backup storage battery pack discharging remote control system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112018870A true CN112018870A (en) | 2020-12-01 |
Family
ID=73505883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010806277.9A Pending CN112018870A (en) | 2020-08-11 | 2020-08-11 | Direct-current power supply backup storage battery pack discharging remote control system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112018870A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030747A (en) * | 2021-02-05 | 2021-06-25 | 国网宁夏电力有限公司吴忠供电公司 | Station storage battery pack checking discharge test system |
| CN113725995A (en) * | 2021-08-24 | 2021-11-30 | 南京南瑞继保电气有限公司 | Power distribution terminal double-backup power supply management system and management method thereof |
| CN113890001A (en) * | 2021-09-29 | 2022-01-04 | 国网湖北省电力有限公司宜昌供电公司 | One-key operation method for electric operation type two-power two-charging direct current system |
-
2020
- 2020-08-11 CN CN202010806277.9A patent/CN112018870A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030747A (en) * | 2021-02-05 | 2021-06-25 | 国网宁夏电力有限公司吴忠供电公司 | Station storage battery pack checking discharge test system |
| CN113725995A (en) * | 2021-08-24 | 2021-11-30 | 南京南瑞继保电气有限公司 | Power distribution terminal double-backup power supply management system and management method thereof |
| CN113725995B (en) * | 2021-08-24 | 2024-01-02 | 南京南瑞继保电气有限公司 | Dual-backup power supply management system and management method for power distribution terminal |
| CN113890001A (en) * | 2021-09-29 | 2022-01-04 | 国网湖北省电力有限公司宜昌供电公司 | One-key operation method for electric operation type two-power two-charging direct current system |
| CN113890001B (en) * | 2021-09-29 | 2023-11-10 | 国网湖北省电力有限公司宜昌供电公司 | One-key operation method of electric operation type two-electricity two-charging direct current system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107219470B (en) | On-line checking discharge device and method for storage battery pack | |
| CN112018870A (en) | Direct-current power supply backup storage battery pack discharging remote control system and method | |
| CN212380995U (en) | DC power supply backup storage battery pack discharging remote control system | |
| WO2022051902A1 (en) | Low-voltage battery charging system and method | |
| CN103825351B (en) | A kind of intelligent energy storage type emergency power system | |
| CN113067404B (en) | Power supply system and power supply method for power exchange station | |
| CN203014423U (en) | Battery module set management and control device of uninterruptible power supply | |
| CN108879879A (en) | Storage battery pack online discharge maintenance device and method | |
| CN109449944B (en) | Bidirectional direct-current power supply control system and method for transformer substation | |
| CN210109280U (en) | Remote capacity checking system for storage battery of electric direct-current power supply | |
| CN110999013A (en) | Energy storage system | |
| CN111130094A (en) | On-line discharging direct current system for mutual hot standby | |
| CN103151790A (en) | Intelligent power supply system of peak moving and valley filling | |
| CN207234517U (en) | A kind of storage battery parallel power supply system based on straight-flow system | |
| CN111722125A (en) | Online energy-saving storage battery capacity test equipment | |
| TWI628890B (en) | Synchronous control system architecture to improve energy efficiency | |
| CN111775706A (en) | Power battery low-voltage manual maintenance switch control system and vehicle | |
| CN116653603A (en) | Vehicle low-voltage power supply system and electric automobile | |
| CN108695566B (en) | Synchronous control system architecture for improving energy-saving efficiency | |
| CN109245286A (en) | A kind of transformerless emergency power supply | |
| CN112798970B (en) | Remote nuclear capacity system of storage battery of transformer substation | |
| CN111181240B (en) | Connection method of energy storage battery and UPS and charge and discharge control method | |
| CN113253124A (en) | Safe and energy-saving power storage battery nuclear capacity discharging device and method | |
| CN112234691A (en) | DCDC converter with integrated bin control function for power conversion cabinet | |
| CN207218303U (en) | A kind of array electric supply installation and energy-storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |