CN107196366B - Storage battery online maintenance system based on three-port charging and discharging machine - Google Patents
Storage battery online maintenance system based on three-port charging and discharging machine Download PDFInfo
- Publication number
- CN107196366B CN107196366B CN201710424474.2A CN201710424474A CN107196366B CN 107196366 B CN107196366 B CN 107196366B CN 201710424474 A CN201710424474 A CN 201710424474A CN 107196366 B CN107196366 B CN 107196366B
- Authority
- CN
- China
- Prior art keywords
- storage battery
- battery pack
- port
- direct current
- online maintenance
- 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.)
- Active
Links
- 238000012423 maintenance Methods 0.000 title claims abstract description 121
- 238000007599 discharging Methods 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 16
- 238000002955 isolation Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- H02J7/0022—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a storage battery online maintenance system based on a three-port charging and discharging machine, which comprises: the first battery polling instrument is connected with the first storage battery pack, the second battery polling instrument is connected with the second storage battery pack, and the alternating current power grid provides alternating current for the direct current power supply system; the three-port charging and discharging machine is respectively connected with the first storage battery pack, the second storage battery pack and the alternating current power grid, provides conditions for online maintenance of the first storage battery pack or the second storage battery pack, and outputs the discharging quantity of the first storage battery pack or the second storage battery pack to the alternating current power grid; and the system monitor outputs a maintenance control instruction according to a preset rule to start the three-port charge-discharge machine to perform online maintenance on the first storage battery pack or the second storage battery pack when the first storage battery pack or the second storage battery pack meets online maintenance conditions. The scheme can simply, reliably and automatically carry out online maintenance on the storage battery, and is low in cost, flexible and efficient.
Description
Technical Field
The invention relates to the field of electric power, in particular to a storage battery online maintenance system based on a three-port charge and discharge machine.
Background
Along with the development of scientific and technological technology and the improvement that practical application required, electric power system's reliability requirement also constantly improves, wherein as energy storage equipment's storage battery is indispensable, when electric power system's alternating current power supply end the accident appears and leads to exchanging the outage, storage battery will act as power output end, guarantees that consumer normally works on the direct current bus, avoids causing the enlargements of accident influence. Therefore, the reliable operation of the storage battery pack is an important guarantee for the reliable operation of the power system. In view of the importance of the battery pack, the battery pack needs to be maintained regularly in order to ensure that the battery pack can operate reliably for a long time.
The connection mode of a storage battery pack system commonly used in a direct-current power supply system in the existing power system is shown in figure 1, and the system is provided with 2 groups of storage batteries which are divided into two sections of direct-current buses and are mutually standby through a switch K0. The conventional method for maintaining the storage battery pack is to regularly use a storage battery discharging instrument to discharge, calculate the capacity of the storage battery pack through a battery polling instrument and judge the quality of the storage battery pack according to the consistency of the voltage of each single battery terminal in the discharging process. The maintenance method generally adopts an off-line maintenance mode, and during maintenance, firstly, a switch K0 is closed, then, an output switch (K1 or K2) of the maintained storage battery pack is opened, and a discharge switch (K3 or K4) of the maintained storage battery pack is closed. In a direct-current power supply system of a power system, remote control of switches is generally not allowed, so that the switches need to be manually operated on site by professional maintenance personnel, the professional maintenance personnel need to track the switches in the whole process in the maintenance process, the time for maintaining each group of storage batteries once is about 10-20 hours, the number of storage batteries used in the power system is large, a large number of professional operation personnel are needed, and the labor cost is high.
Disclosure of Invention
The present invention provides an online maintenance system for a storage battery based on a three-port charging and discharging machine, which is directed to overcome the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a storage battery online maintenance system based on a three-port charge-discharge machine, which is used for maintaining the storage battery in a direct current power supply system, wherein the direct current power supply system comprises a first storage battery pack and a second storage battery pack, and the online maintenance system comprises:
the first battery patrol instrument is connected with the first storage battery pack, calculates the residual electric quantity of the first storage battery pack in real time, detects the battery information of the first storage battery pack, and outputs a first detection result; the first detection result includes: the residual electric quantity and the detection information of the first storage battery pack;
the second battery patrol instrument is connected with the second storage battery pack, calculates the residual electric quantity of the second storage battery pack in real time, detects the battery information of the second storage battery pack and outputs a second detection result; the second detection result includes: the residual electric quantity and the detection information of the second storage battery pack;
the alternating current power grid is used for providing alternating current for the direct current power supply system;
the three-port charge and discharge machine is respectively connected with the first storage battery pack, the second storage battery pack and the alternating current power grid, provides conditions for online maintenance of the first storage battery pack or the second storage battery pack, and outputs the discharge capacity of the first storage battery pack or the second storage battery pack to the alternating current power grid;
and the system monitor outputs a maintenance control instruction according to a preset rule to start the three-port charging and discharging machine so that the first storage battery pack or the second storage battery pack discharges to the alternating current power grid when the first storage battery pack or the second storage battery pack meets an online maintenance condition, and processes the first detection result or the second detection result at the same time.
In the online maintenance system for a storage battery based on a three-port charge and discharge machine according to the present invention, preferably, the online maintenance system further includes:
a first dc bus connected to the first battery pack;
the second direct current bus is connected with the second storage battery pack;
and a bus coupler switch is arranged between the first direct current bus and the second direct current bus, and the bus coupler switch controls the connection or disconnection of the first direct current bus and the second direct current bus.
In the online maintenance system for the storage battery based on the three-port charge-discharge machine, preferably, the three-port charge-discharge machine is provided with a first direct current port, a second direct current port and an alternating current port;
the first direct current port is connected with the first direct current bus, the second direct current port is connected with the second direct current bus, the alternating current port is connected with the alternating current power grid, and the first direct current port, the second direct current port and the alternating current port are all ports with switchable working states.
In the online maintenance system for the storage battery based on the three-port charge-discharge machine of the present invention, preferably, an isolation transformer is disposed in the three-port charge-discharge machine, and is used for realizing mutual isolation between the first dc port, the second dc port, and the ac port.
In the online maintenance system for a storage battery based on a three-port charge and discharge machine according to the present invention, preferably, the online maintenance system further includes:
and the first charger is respectively connected with the first direct current bus and the alternating current power grid, and receives a maintenance control instruction of the system monitor to enable the output voltage of the first charger to be lower than the terminal voltage of the first storage battery when the first storage battery performs discharge maintenance.
In the online maintenance system for a storage battery based on a three-port charge and discharge machine according to the present invention, preferably, the online maintenance system further includes:
and the second charger is respectively connected with the second direct-current bus and the alternating-current power grid, and receives a maintenance control instruction of the system monitor to enable the output voltage of the second charger to be lower than the terminal voltage of the second storage battery when the second storage battery carries out discharge maintenance.
In the online maintenance system for a storage battery based on a three-port charging and discharging machine according to the present invention, preferably, the online maintenance system further includes:
the first switch is arranged between the first direct current bus and the first storage battery pack and controls the connection or disconnection of the first direct current bus and the first storage battery pack;
and the second switch is arranged between the second direct current bus and the second storage battery pack and controls the connection or disconnection of the second direct current bus and the second storage battery pack.
In the online maintenance system for a storage battery based on a three-port charging and discharging machine according to the present invention, preferably, the online maintenance system further includes:
the third switch is arranged between the first direct current port of the three-port charging and discharging machine and the first direct current bus;
and the fourth switch is arranged between the second direct current port of the three-port charging and discharging machine and the second direct current bus.
In the online maintenance system for a storage battery based on a three-port charging and discharging machine according to the present invention, preferably, the online maintenance system further includes:
the fifth switch is arranged between the first charger and the first direct current bus and controls the connection or disconnection between the first charger and the first direct current bus;
and the sixth switch is arranged between the second charger and the second direct-current bus and controls the connection or disconnection between the second charger and the second direct-current bus.
The invention also provides a storage battery online maintenance system based on the three-port charging and discharging machine, which comprises an upper computer and the online maintenance system, wherein the upper computer realizes data communication with the online maintenance system through the system monitor.
The storage battery online maintenance system based on the three-port charging and discharging machine has the following beneficial effects: the technical scheme of the invention can realize the on-line maintenance of the storage battery on the premise of not influencing the normal operation of the direct-current power supply system, can automatically start and stop the maintenance according to the preset rule, automatically finish the whole maintenance process without the participation of professional operators, has simple and flexible control mode, and greatly improves the reliability and the stability of the direct-current power supply system by automatically replacing a failed charger with a three-port charging and discharging machine when the charger in the system is abnormal.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a diagram illustrating a connection of a battery pack commonly used in a DC power system in a conventional power system;
FIG. 2 is a schematic structural diagram of an embodiment of the online maintenance system for a three-port charging and discharging machine-based battery of the present invention;
fig. 3 is a schematic structural diagram of another embodiment of the online maintenance system for a storage battery based on a three-port charging and discharging machine according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of specific embodiments for carrying out the invention and do not delimit the invention.
The invention provides a storage battery online maintenance system based on a three-port charging and discharging machine, aiming at the problems in the prior art, the storage battery online maintenance system utilizes a system monitor to realize the automatic online maintenance of the maintenance system, the system is configured with the three-port charging and discharging machine, the three-port charging and discharging machine is started to provide conditions for the maintenance of a storage battery when the storage battery is maintained, meanwhile, when the charger of the system fails, the failed charger can be automatically replaced by the three-port charging and discharging machine, and the reliability and the stability of a direct current power supply system are greatly improved.
Fig. 2 is a schematic structural diagram of a three-port charge and discharge machine-based online maintenance system for a storage battery according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown.
The online maintenance system for the storage battery based on the three-port charging and discharging machine in the embodiment can be used for maintaining the storage battery in a direct current power supply system, wherein two groups of storage batteries are configured in a general direct current power supply system, as shown in fig. 2, the two groups of storage batteries are respectively a first storage battery pack 13 and a second storage battery pack 14, and 2 sections of direct current buses are configured at the same time, namely a first direct current bus 11 and a second direct current bus 12. Specifically, the online maintenance system for a storage battery based on a three-port charge/discharge machine 30 of the present embodiment includes: a first battery polling instrument 15, a second battery polling instrument 16, an alternating current power grid 20, a three-port charge-discharge machine 30, and a system monitor 40; also comprises a first charger 17 and a second charger 18, wherein,
the first battery patrol instrument 15 is connected with the first storage battery pack 13, calculates the residual electric quantity of the first storage battery pack 13 in real time, detects the battery information of the first storage battery pack 13, and outputs a first detection result; the first detection result includes the remaining power of the first battery pack 13 and detection information.
It can be understood that, through the real-time detection of the first battery pack 13 by the first battery inspector 15, when the first battery pack 13 is discharged, the remaining capacity of the first battery pack 13 can be calculated in real time, the voltage of each single battery in the first battery pack 13 can be detected, and the calculated remaining capacity and the voltage information of each single battery in the first battery pack 13 can be uploaded to the system monitor 40 in real time, so that not only can abnormal single batteries in the first battery pack 13 be effectively and reliably detected, but also the condition of the stored electric quantity of the abnormal single batteries can be grasped in real time.
The second battery patrolling instrument 16 is connected with the second storage battery pack 14, calculates the residual electric quantity of the second storage battery pack 14 in real time, detects the battery information of the second storage battery pack 14 and outputs a second detection result; the second detection result includes the remaining power of the second battery pack 14 and detection information.
It can be understood that, through the real-time detection of the second battery pack 14 by the second battery polling device 16, when the second battery pack 14 is discharged, the remaining capacity of the second battery pack 14 can be calculated in real time, the voltage of each single battery in the second battery pack 14 can be detected, and the calculated remaining capacity and the voltage information of each single battery in the second battery pack 14 can be uploaded to the system monitor 40 in real time, so that not only can abnormal single batteries in the second battery pack 14 be effectively and reliably detected, but also the condition of the stored electric quantity thereof can be grasped in real time.
And the alternating current power grid 20 is connected with the three-port charge and discharge machine 30, supplies alternating current to the direct current power supply system, and enables the first storage battery pack 13 or the second storage battery pack 14 to discharge to the alternating current power grid 20 through the three-port charge and discharge machine 30 in the discharge maintenance process of the first storage battery pack 13 or the second storage battery pack 14.
And a three-port charge and discharge machine 30 connected to the first battery pack 13, the second battery pack 14, the system monitor 40, and the ac power grid 20, respectively. Preferably, in the present embodiment, the three-port charging and discharging machine 30 is provided with three ports, which are a first dc port a, a second dc port B, and an ac port C, and all of the three ports are switchable ports. When the dc power supply system is operating normally, the three-port charge/discharge machine 30 is in a standby state.
The first dc port a is connected to the first dc bus 11, and the three-port charge/discharge device 30 is connected to the first battery pack 13 through the first dc bus 11. The second dc port B is connected to the second dc bus 12, and the three-port charge/discharge machine 30 is connected to the second battery pack 14 through the second dc bus 12. The ac port C is connected to the ac power grid 20, and the three-port charge/discharge machine 30 is connected to the ac power grid 20 through the ac port C. Further, the three-port charge and discharge machine 30 may communicate with the system monitor 40, and may employ RS485 or CAN for communication therebetween.
The three-port charging and discharging machine 30 of the present embodiment is provided therein with an isolation transformer, by which mutual isolation between the three ports is achieved.
It should be noted that, when the dc power supply system normally operates, the three-port charging and discharging machine 30 is in a standby state, at this time, both the first dc port a and the second dc port B are set as input ports, and the ac port C is set in a locked state, and if the first charger 17 or the second charger 18 fails, the three-port charging and discharging machine 30 may automatically switch to work instead of the failed first charger 17 or the second charger 18 (at this time, the ac port C is set as an input port, and the first dc port a or the second dc port B is set as an output port); when the first battery pack 13 needs discharge maintenance, the first dc port a is set as an input port, the second dc port B is set in a locked state, and the ac port C is set as an output port. Conversely, when the second battery pack 14 needs to be subjected to discharge maintenance, the first dc port a is set to the locked state, the second dc port B is set to the input port, and the ac port C is set to the output port.
The first charger 17 is connected to the first dc bus 11 and the ac grid 20, respectively. When the direct current power supply system normally operates, the direct current power supply system supplies power to a load on the first direct current bus 11 and supplements charge for the first storage battery pack 13, and when the first storage battery pack 13 is subjected to discharge maintenance, the output voltage of the direct current power supply system is changed to be lower than the terminal voltage of the first storage battery pack 13 according to a maintenance control instruction sent by the system monitor 40, so that a condition is provided for the discharge maintenance of the first storage battery pack 13. It is to be understood that the first charger 17 may be composed of a parallel operation of high frequency switching power supply modules for power operation, and the capacity thereof is configured according to the capacity of the first battery pack 13 and the load on the first dc bus 11. Generally, when the first charger 17 charges the first secondary battery pack 13, there are the uniform charge and the floating charge modes. In addition, the communication between the first charger 17 and the system monitor 40 CAN be realized through RS485 or CAN.
And the second charger 18 is connected with the second direct current bus 12 and the alternating current power grid 20 respectively. When the dc power supply system normally operates, the system supplies power to the load on the second dc bus 12 and supplements the charge for the second battery pack 14, and when the second battery pack 14 performs discharge maintenance, the output voltage of the system is changed to be lower than the terminal voltage of the second battery pack 14 according to the maintenance control instruction sent by the system monitor 40, so as to provide a condition for the discharge maintenance of the second battery pack 14. It is to be understood that the second charger 18 may be composed of a parallel operation of high frequency switching power supply modules for power operation, and the capacity thereof is configured according to the capacity of the second battery pack 14 and the load on the second dc bus 12. Generally, when the second charger 18 charges the second battery pack 14, there are both charge equalization and float modes. In addition, the communication between the second charger 18 and the system monitor 40 CAN be realized through RS485 or CAN.
And the system monitor 40 is connected with the three-port charge and discharge machine 30, the first battery routing inspection instrument 15 and the second battery routing inspection instrument 16 respectively, and is used for receiving and processing the first detection result and the second detection result uploaded by the first battery routing inspection instrument 15 or the second battery routing inspection instrument 16 in real time, outputting a corresponding maintenance control instruction according to a preset rule when the first storage battery pack 13 or the second storage battery pack 14 meets the maintenance condition, starting the three-port charge and discharge machine 30, and realizing the discharge maintenance of the first storage battery pack 13 or the second storage battery pack 14.
For example, when the first battery pack 13 satisfies the maintenance condition, the system monitor 40 sends a maintenance control instruction to the three-port charge/discharge machine 30 and the first battery pack 17 according to a maintenance period and a maintenance time preset therein, the output voltage of the first battery pack 17 is adjusted to be lower than the terminal voltage of the first battery pack 13, so as to provide a condition for the discharge maintenance of the first battery pack 13, after the three-port charge/discharge machine 30 receives the maintenance control instruction, the first dc port a is set as an input port, the second dc port B is set as a blocking state, the ac port C is set as an output port, the three-port charge/discharge machine 30 is started, and the first battery pack 13 is discharged to the ac power grid 20 through the three-port charge/discharge machine 30, and when the set discharge termination condition is reached, the system monitor 40 sends a corresponding control instruction to make the three-port charge/discharge machine 30 in a charging state, so as to supplement charging to the first battery pack 13; or the system monitor 40 may also control to turn off the three-port charging and discharging machine 30, and control the first charger 17 to charge the first battery pack 13 additionally.
In addition, in the discharging process of the first storage battery pack 13, if the abnormal state of the first storage battery pack 13 or the power loss of the alternating current power supply is found, the system monitor 40 immediately stops the discharging maintenance, and automatically transfers the electric energy of the second storage battery pack 14 to the first storage battery pack 13 by controlling the three-port charging and discharging machine 30, so that the electric energy of the two storage battery packs is kept close.
To sum up, the storage battery online maintenance system based on the three-port charge and discharge machine according to the embodiment of the present invention can automatically implement online maintenance of the storage battery through the system monitor 40 by using the storage battery online maintenance strategy (i.e. the preset rule) preset in the system monitor 40, the storage battery does not break away from the dc power supply system during the maintenance of the whole storage battery, and if the ac power grid 20 is powered off during the discharge process, the energy at the high voltage end can be automatically transferred to the low voltage end through the three-port charge and discharge machine 30 to automatically balance the two storage battery groups, thereby implementing automatic online maintenance of the storage battery.
It should be noted that first battery pack 13 and second battery pack 14 are independent from each other in the discharge process and do not affect each other in the present invention. Therefore, the online maintenance of the storage battery pack can freely select the self discharge depth of each storage battery pack according to the actual situation.
As shown in fig. 2, the online maintenance system for a storage battery based on a three-port charging and discharging machine of the present embodiment further includes:
the bus coupler switch K0 is arranged between the first direct current bus 11 and the second direct current bus 12, and is used for controlling connection or disconnection of the first direct current bus 11 and the second direct current bus 12.
And a first switch K1 provided between the first dc bus 11 and the first battery pack 13, and controlling connection and disconnection between the first dc bus 11 and the first battery pack 13.
And a second switch K2 provided between the second dc bus 12 and the second battery pack 14, and controlling connection and disconnection between the second dc bus 12 and the second battery pack 14.
A third switch K3 provided between the first dc port a of the three-port charge and discharge machine 30 and the first dc bus 11; and a fourth switch K4 disposed between the second dc port B of the three-port charge and discharge machine 30 and the second dc bus 12.
And the fifth switch K5 is arranged between the first charger 17 and the first direct current bus 11 and controls the connection or disconnection between the first charger 17 and the first direct current bus 11.
And the sixth switch K6 is arranged between the second charger 18 and the second direct-current bus 12 and controls the connection or disconnection between the second charger 18 and the second direct-current bus 12.
When the system normally operates, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5 and the sixth switch K6 are all in a closed state, and the bus coupler switch K0 is in an open state. When the first storage battery pack 13 or the second storage battery pack 14 needs to be subjected to discharge maintenance, the first switch K1 and the second switch K2 are kept in a closed state, that is, the storage battery pack is not separated from a direct-current power supply in the discharge maintenance process of the storage battery pack, so that real online discharge maintenance is realized.
The control principle of the online maintenance system for a storage battery based on a three-port charge/discharge machine shown in fig. 2 is described below by taking the discharge maintenance of first battery pack 13 as an example:
assuming that the direct-current power supply system is a 220VDC system, the configuration of the first battery pack 13 and the second battery pack 14 is completely consistent, the average charging voltage is 242VDC, the float charging voltage is 230VDC, and the discharging termination voltage of the first battery pack 13 and the second battery pack 14 is 198VDC; when the system monitor 40 detects that the terminal voltage of the first battery pack 13 or the second battery pack 14 decreases to 198VDC, it issues a control instruction to end the maintenance, and terminates the discharging maintenance of the first battery pack 13 or the second battery pack 14; the terminal voltage of the first battery pack 13 or the second battery pack 14 is detected by the first battery patrol instrument 15 and the second battery patrol instrument 16, and is uploaded to the system monitor 40.
When the dc power supply system normally operates, the first battery pack 13 and the second battery pack 14 are both in a float charge state, the terminal voltage is 230VDC, the first dc port a and the second dc port B of the three-port charge and discharge machine 30 are both set at the input ports, and the ac port C is in a lock state, that is, the three-port charge and discharge machine 30 is in a standby state.
When the first storage battery pack 13 meets the online maintenance condition, the system monitor 40 issues a command for maintaining the first storage battery pack 13, and the first charger 17 receives the command to adjust the output voltage of the first charger to be 198VDC, so that a condition for discharging the first storage battery pack 13 is created; after receiving the instruction, the three-port charge-discharge machine 30 sets the first dc port a as an input port, sets the ac port C as an output port, and sets the second dc port B in a locked state, so that the three-port charge-discharge machine 30 is started, and the first battery pack 13 can discharge to the ac power grid 20 through the three-port charge-discharge machine 30. In the discharging process of the first battery pack 13, the first battery routing inspection instrument 15 calculates the remaining capacity of the first battery pack 13 in real time and detects the voltage of each single battery in the first battery pack 13, and simultaneously uploads the detection result to the system monitor 40 in real time, and the system monitor 40 processes the detection information uploaded by the first battery routing inspection instrument 15 in real time.
When detecting that the terminal voltage of the first battery pack 13 decreases to 198VDC, the system monitor 40 issues a command to end maintenance, and at this time, the first battery pack 13 needs to be recharged, and the system monitor 40 may select the first charger 17 to recharge the first battery pack 13, or may select the three-port charging and discharging machine 30 to recharge the first battery pack 13.
Assuming that the system monitor 40 selects the three-port charge-discharge machine 30 to supplement the charging of the first secondary battery pack 13, at this time, the ac port C of the three-port charge-discharge machine 30 is set as the input port, the first dc port a is set as the output port, and the output voltage of the first dc port a is set to the uniform charging voltage 242VDC, the second dc port B is maintained in the locked state. When the first battery pack 13 is fully charged, the normal operation state is recovered, and thus, the maintenance process of the first battery pack 13 is finished.
In addition, during the discharge maintenance of first battery pack 13, if it is found that first battery pack 13 is in an abnormal state or the ac power source is out of power, system monitor 40 immediately terminates the discharge process and issues a warning. Secondly, during the discharge of first battery pack 13, since the charge capacity thereof is reduced, three-port charge-discharge motor 30 automatically transfers the electric energy of second battery pack 14 to first battery pack 13 so that the electric energy of first battery pack 13 and second battery pack 14 are kept similar.
As shown in fig. 3, the invention further provides a storage battery online maintenance system based on the three-port charging and discharging machine, which comprises an upper computer and the storage battery online maintenance system based on the three-port charging and discharging machine. The upper computer can communicate with the online maintenance system through the system monitor 40.
Specifically, the upper computer may actively send a maintenance instruction to the system monitor 40 to start maintenance of the storage battery, after receiving the maintenance instruction sent by the upper computer, the system monitor 40 converts the maintenance instruction into a corresponding maintenance control instruction and sends the maintenance control instruction to the three-port charging and discharging machine 30, the first charger 17 or the second charger 18, and meanwhile, the upper computer may also receive online maintenance information of the storage battery pack returned by the system monitor 40.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. A storage battery online maintenance system based on a three-port charging and discharging machine is used for maintaining storage batteries in a direct current power supply system, wherein the direct current power supply system comprises a first storage battery pack and a second storage battery pack, and the online maintenance system comprises:
the first battery patrol instrument is connected with the first storage battery pack, calculates the residual electric quantity of the first storage battery pack in real time, detects the battery information of the first storage battery pack, and outputs a first detection result; the first detection result includes: the residual electric quantity and the detection information of the first storage battery pack;
the second battery patrol instrument is connected with the second storage battery pack, calculates the residual electric quantity of the second storage battery pack in real time, detects the battery information of the second storage battery pack, and outputs a second detection result; the second detection result includes: the residual electric quantity and the detection information of the second storage battery pack;
the alternating current power grid is used for providing alternating current for the direct current power supply system;
the three-port charging and discharging machine is respectively connected with the first storage battery pack, the second storage battery pack and the alternating current power grid, provides conditions for online maintenance of the first storage battery pack or the second storage battery pack, and outputs the discharging quantity of the first storage battery pack or the second storage battery pack to the alternating current power grid; the three-port charge and discharge machine is provided with a first direct current port, a second direct current port and an alternating current port; the first direct current port is connected with the first direct current bus, the second direct current port is connected with the second direct current bus, the alternating current port is connected with the alternating current power grid, and the first direct current port, the second direct current port and the alternating current port are all ports with switchable working states;
the system monitor outputs a maintenance control instruction according to a preset rule to start the three-port charging and discharging machine to enable the first storage battery pack or the second storage battery pack to discharge to the alternating current power grid when the first storage battery pack or the second storage battery pack meets an online maintenance condition, and processes the first detection result or the second detection result
The online maintenance system further comprises:
a first dc bus connected to the first battery pack;
the second direct current bus is connected with the second storage battery pack;
a bus coupler switch is arranged between the first direct current bus and the second direct current bus, and the bus coupler switch controls the connection or disconnection of the first direct current bus and the second direct current bus;
the online maintenance system further comprises:
and the first charger is respectively connected with the first direct current bus and the alternating current power grid, and receives a maintenance control instruction sent by the system monitor to enable the output voltage of the first charger to be lower than the terminal voltage of the first storage battery when the first storage battery carries out discharge maintenance.
2. The three-port charge and discharge machine based battery online maintenance system according to claim 1, wherein an isolation transformer is provided in the three-port charge and discharge machine for achieving mutual isolation between the first dc port, the second dc port, and the ac port.
3. The three-port charge and discharge machine based battery online maintenance system of claim 1, further comprising:
and the second charger is respectively connected with the second direct-current bus and the alternating-current power grid, and receives a maintenance control instruction sent by the system monitor when the second storage battery pack carries out discharge maintenance so that the output voltage of the second charger is lower than the terminal voltage of the second storage battery pack.
4. The three-port charge and discharge machine based battery online maintenance system of claim 1, further comprising:
the first switch is arranged between the first direct current bus and the first storage battery pack and controls the connection or disconnection of the first direct current bus and the first storage battery pack;
and the second switch is arranged between the second direct current bus and the second storage battery pack and controls the connection or disconnection of the second direct current bus and the second storage battery pack.
5. The three-port charge and discharge machine based battery online maintenance system of claim 1, further comprising:
the third switch is arranged between the first direct current port of the three-port charge and discharge machine and the first direct current bus;
and the fourth switch is arranged between the second direct current port of the three-port charging and discharging machine and the second direct current bus.
6. The three-port charge-discharge machine based battery online maintenance system of claim 3, further comprising:
the fifth switch is arranged between the first charger and the first direct current bus and controls the connection or disconnection between the first charger and the first direct current bus;
and the sixth switch is arranged between the second charger and the second direct-current bus and controls the connection or disconnection between the second charger and the second direct-current bus.
7. The three-port charge-discharge machine based storage battery online maintenance system according to claim 1, characterized by comprising an upper computer, wherein the upper computer realizes data communication with the online maintenance system through the system monitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710424474.2A CN107196366B (en) | 2017-06-07 | 2017-06-07 | Storage battery online maintenance system based on three-port charging and discharging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710424474.2A CN107196366B (en) | 2017-06-07 | 2017-06-07 | Storage battery online maintenance system based on three-port charging and discharging machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107196366A CN107196366A (en) | 2017-09-22 |
| CN107196366B true CN107196366B (en) | 2023-04-07 |
Family
ID=59877333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710424474.2A Active CN107196366B (en) | 2017-06-07 | 2017-06-07 | Storage battery online maintenance system based on three-port charging and discharging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196366B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706940B (en) * | 2017-09-30 | 2020-02-18 | 北京空间飞行器总体设计部 | Flexible grid-connected system between bus power supply systems without regulation of spacecraft |
| CN108233513A (en) * | 2018-02-07 | 2018-06-29 | 深圳奥特迅电力设备股份有限公司 | Power-supply system and dc bus guard method with dc bus defencive function |
| CN108879879A (en) * | 2018-08-10 | 2018-11-23 | 广东电网有限责任公司 | Battery group is discharged maintenance device and method online |
| CN109193048B (en) * | 2018-09-10 | 2020-02-11 | 广东电网有限责任公司 | Method and device for maintaining storage battery pack on line |
| CN110441709B (en) * | 2019-07-29 | 2021-11-05 | 云南电网有限责任公司红河供电局 | Transformer substation direct-current power supply system for monitoring storage battery and charging module and monitoring method |
| CN110931902B (en) * | 2020-02-19 | 2020-07-31 | 深圳奥特迅电力设备股份有限公司 | Storage battery pack online maintenance method and system |
| CN111509310A (en) * | 2020-03-25 | 2020-08-07 | 国网江西省电力有限公司电力科学研究院 | Method and device for online testing performance of storage battery of direct current system of transformer substation |
| CN112968487B (en) * | 2021-02-18 | 2022-08-30 | 中国长江三峡集团有限公司 | Direct-current power supply system lead-acid storage battery pack discharge test system and method |
| CN113489084A (en) * | 2021-06-07 | 2021-10-08 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Automatic replacement method for single storage battery |
| CN116683060B (en) * | 2023-08-01 | 2024-02-02 | 深圳奥特迅电力设备股份有限公司 | Storage battery pack maintenance method, storage battery pack maintenance device, terminal equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076817U (en) * | 2011-05-17 | 2011-12-14 | 云南电网公司曲靖供电局 | Storage battery online intelligent activating device of transformer substation direct current (DC) system |
| CN202405387U (en) * | 2011-12-01 | 2012-08-29 | 吴瑞荣 | Remote comprehensive management system for storage battery of mobile base station |
| CN104300669A (en) * | 2014-09-15 | 2015-01-21 | 中广核核电运营有限公司 | Nuclear power station direct-current power source hybrid power supply system |
-
2017
- 2017-06-07 CN CN201710424474.2A patent/CN107196366B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202076817U (en) * | 2011-05-17 | 2011-12-14 | 云南电网公司曲靖供电局 | Storage battery online intelligent activating device of transformer substation direct current (DC) system |
| CN202405387U (en) * | 2011-12-01 | 2012-08-29 | 吴瑞荣 | Remote comprehensive management system for storage battery of mobile base station |
| CN104300669A (en) * | 2014-09-15 | 2015-01-21 | 中广核核电运营有限公司 | Nuclear power station direct-current power source hybrid power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107196366A (en) | 2017-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107196366B (en) | Storage battery online maintenance system based on three-port charging and discharging machine | |
| JP4954335B2 (en) | Quick charger | |
| CN205081480U (en) | Battery energy storage system | |
| CN203014423U (en) | Battery module set management and control device of uninterruptible power supply | |
| CN110011408B (en) | Mobile emergency power supply system and working method thereof | |
| CN108879879A (en) | Battery group is discharged maintenance device and method online | |
| CN104810886B (en) | Intelligent battery group and its connection circuit | |
| CN107749632A (en) | A kind of energy-storage system and its control method | |
| CN114516275A (en) | Charging system for AC and DC power supply equipment of electric vehicle | |
| CN210007468U (en) | kinds of mobile emergency power supply device | |
| CN111864889A (en) | Uninterrupted emergency power supply system and method for open-circuit protection of lead-acid storage battery pack | |
| CN115459381A (en) | Battery management method, system, computer readable storage medium and electronic device | |
| CN114628804A (en) | Control device and method for online maintenance of storage battery pack and power system | |
| CN111175667A (en) | Battery test system | |
| CN206820086U (en) | A kind of accumulator on-line maintenance control circuit and system | |
| CN112234636A (en) | Energy storage converter direct current main contactor multi-parallel system | |
| CN112886672A (en) | Portable intelligent charging cabinet and control system thereof | |
| CN112803578A (en) | Intelligent distribution network power supply module and management method | |
| CN104882936A (en) | Communication energy storage power supply system | |
| CN112816896A (en) | Dual-power direct-current system battery pack remote nuclear capacity control system and control method | |
| CN208127888U (en) | A kind of energy storage is for electrical integrated ups power system | |
| CN103199586B (en) | -48V direct current single system double-power-source storage battery contact device and switching method thereof | |
| CN204761067U (en) | Communication energy storage power supply system | |
| CN207790377U (en) | Charging unit for electric vehicle alternating-current charging | |
| CN106532893B (en) | PV air-conditioner device, battery management system and its control method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |