CN207265682U - A kind of accumulator on-line maintenance system based on three port charge-discharge machines - Google Patents
A kind of accumulator on-line maintenance system based on three port charge-discharge machines Download PDFInfo
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- CN207265682U CN207265682U CN201720655964.9U CN201720655964U CN207265682U CN 207265682 U CN207265682 U CN 207265682U CN 201720655964 U CN201720655964 U CN 201720655964U CN 207265682 U CN207265682 U CN 207265682U
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Abstract
The accumulator on-line maintenance system based on three port charge-discharge machines is the utility model is related to, including：First battery data logging device, is connected, the second battery data logging device with the first storage battery group, is connected with the second storage battery group, AC network, alternating current is provided for DC power system；Three port charge-discharge machines, it is connected respectively with the first storage battery group, the second storage battery group and AC network, condition is provided for the on-line maintenance of the first storage battery group or the second storage battery group, and the discharge capacity of the first storage battery group or the second storage battery group is exported to AC network；System monitor, when the first storage battery group or the second storage battery group meet on-line maintenance condition, safeguards that control instruction starts three port charge-discharge machines and carries out on-line maintenance to the first storage battery group or the second storage battery group according to preset rules output.This programme simple and reliable automatically can carry out on-line maintenance to storage battery, and cost is low, flexible and efficient.
Description
Technical field
Power domain is the utility model is related to, more specifically to a kind of storage battery based on three port charge-discharge machines
On-line maintenance system.
Background technology
With the development of science and technology and the raising of application request, the reliability requirement of electric system is also constantly carrying
Height, wherein the storage battery group as energy storage device is essential, causes to exchange when accident occurs in the Alternating Current Power Supply end of electric system
During power-off, storage battery group will serve as power take-off, ensure electrical equipment normal work on dc bus, avoid the shadow that causes the accident
Loud extension.Therefore, the reliability service of storage battery group is one of important leverage of Power System Reliability operation.In view of electric power storage
The importance of pond group, in order to ensure that storage battery group can be run, it is necessary to periodically be safeguarded to storage battery group reliably and with long-term.
The common storage battery system connection mode such as Fig. 1 of DC power system, 2 groups of system configuration in electric system at present
Storage battery, is divided into two sections of dc bus, spare each other by switching K0.Conventional storage battery group maintenance method is periodically to make at present
Discharged with battery discharging instrument, in discharge process, by the capacity of battery data logging device calculating accumulator group and according to each single-unit
The uniformity of battery terminal voltage judges the quality of storage battery group.Maintenance off-line mode is usually used in this maintaining method, is tieing up
Closure switch K0 first during shield, is then turned off being maintained the output switch (K1 or K2) of storage battery group, and closure is maintained storage battery
The discharge switch (K3 or K4) of group.In the DC power system of electric system, do not allow remote control switch generally, therefore,
Operations of these switches need special maintenance personnel on site to be manually operated, need in maintenance process professional operator's whole process with
Track, and each battery safeguards time once when being about 10~20 small, the storage battery group substantial amounts used in electric system,
Therefore substantial amounts of professional operator is needed, human cost is very high.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of the prior art, there is provided one kind is based on three
The accumulator on-line maintenance system of port charge-discharge machine.
Technical solution is used by the utility model solves its technical problem：Construction one kind is based on three port charge-discharge machines
Accumulator on-line maintenance system, for safeguarding the storage battery in DC power system, wherein, DC power system include first
Storage battery group and the second storage battery group, the on-line maintenance system include：
First battery data logging device, is connected with the first storage battery group, calculates the residue of the first storage battery group in real time
The battery information of electricity, detection the first storage battery group, exports the first testing result；First testing result includes：Institute
State the remaining capacity and detection information of the first storage battery group；
Second battery data logging device, is connected with the second storage battery group, calculates the residue of the second storage battery group in real time
The battery information of electricity, detection the second storage battery group, exports the second testing result；Second testing result includes：Institute
State the remaining capacity and detection information of the second storage battery group；
AC network, alternating current is provided for the DC power system；
Three port charge-discharge machines, connect with the first storage battery group, the second storage battery group and the AC network respectively
Connect, condition provided for the on-line maintenance of the first storage battery group or the second storage battery group, and by the first storage battery group or
The discharge capacity of second storage battery group is exported to the AC network；
System monitor, when the first storage battery group or the second storage battery group meet on-line maintenance condition, according to pre-
If rule output safeguards that control instruction starts three port charge-discharge machine so that the first storage battery group or second storage
Battery pack is discharged to the AC network, while first testing result or the second testing result are handled.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
The first dc bus being connected with the first storage battery group；
The second dc bus being connected with the second storage battery group；
It is equipped with bus connection switch between first dc bus and the second dc bus, the bus connection switch control described the
The connection or disconnection of one dc bus and the second dc bus.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
State three port charge-discharge machines and be equipped with the first DC port, the second DC port and AC port；
First DC port is connected with first dc bus, second DC port and second direct current
Busbar connects, and the AC port connects the AC network, and first DC port, the second DC port and exchange
Port is in working condition convertible port.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
State in three port charge-discharge machines and be equipped with isolating transformer, be used for realization first DC port, the second DC port, Yi Jijiao
It is mutually isolated between flow port.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
First charger, is connected with first dc bus, AC network respectively, is carried out in the first storage battery group
When electric discharge is safeguarded, receive the system monitor safeguards that control instruction makes the output voltage of itself be less than first storage battery
The terminal voltage of group.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
Second charger, is connected with second dc bus, AC network respectively, is carried out in the second storage battery group
When electric discharge is safeguarded, receive the system monitor safeguards that control instruction makes the output voltage of itself be less than second storage battery
The terminal voltage of group.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
First switch, is arranged between first dc bus and the first storage battery group, and control described first is straight
Flow the connection or disconnection of busbar and the first storage battery group；
Second switch, is arranged between second dc bus and the second storage battery group, and control described second is straight
Flow the connection or disconnection of busbar and the second storage battery group.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
3rd switch, is arranged between the first DC port and the first dc bus of three port charge-discharge machine；
4th switch, is arranged between the second DC port and the second dc bus of three port charge-discharge machine.
Described in the utility model based in the accumulator on-line maintenance system of three port charge-discharge machines, it is preferable that institute
On-line maintenance system is stated to further include：
5th switch, is arranged between first charger and the first dc bus, control first charger with
Connection or disconnection between first dc bus；
6th switch, is arranged between second charger and the second dc bus, control second charger with
Connection or disconnection between second dc bus.
The utility model also provides a kind of accumulator on-line maintenance system based on three port charge-discharge machines, including upper
Machine, and the on-line maintenance system described in any of the above-described, the host computer by the system monitor realize with it is described
The data communication of line maintenance system.
Implement the accumulator on-line maintenance system based on three port charge-discharge machines of the utility model, have below beneficial to effect
Fruit：Technical solutions of the utility model can be realized and exist to storage battery on the premise of DC power system normal operation is not influenced
Line is safeguarded, can be safeguarded and be terminated according to preset rules automatic start and safeguard, safeguard whole-process automatic completion, it is not necessary to professional operation people
Member participates in, and control mode simple and flexible, and when charger in systems is abnormal, three port charge-discharge machines substitute failure automatically
Charger, substantially increases the reliability and stability of DC power system.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the common storage battery group connection diagram of DC power system in existing electric system；
Fig. 2 is that the structure of accumulator on-line maintenance system one embodiment of the utility model based on three port charge-discharge machines is shown
It is intended to；
Fig. 3 is the structure of accumulator on-line maintenance system another embodiment of the utility model based on three port charge-discharge machines
Schematic diagram.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only realizing
The utility model, is not used to limit the utility model.
In view of the problems of the existing technology, the utility model proposes a kind of storage battery based on three port charge-discharge machines
On-line maintenance system, the accumulator on-line maintenance system realize that the automatic on-line of the maintenance system is safeguarded using system monitor,
Three port charge-discharge machine of system configuration, when carrying out battery service start three port charge-discharge machines is carried with the maintenance to storage battery
For condition, while the charging of failure can also be substituted automatically by three port charge-discharge machines when the charger of system breaks down
Machine, substantially increases the reliability and stability of DC power system.
Fig. 2 shows the accumulator on-line maintenance system based on three port charge-discharge machines that the utility model embodiment provides
Structure diagram, for convenience of description, illustrate only and the relevant part of the utility model embodiment.
The accumulator on-line maintenance system based on three port charge-discharge machines of the present embodiment can be used for safeguarding DC power supply system
Storage battery in system, wherein, two group storage batteries are configured in general DC power system, as shown in Fig. 2, respectively the first electric power storage
13 and second storage battery group 14 of pond group, while 2 sections of dc bus are configured, it is respectively the first dc bus 11 and the second dc bus
12.Specifically, the accumulator on-line maintenance system based on three port charge-discharge machines 30 of the present embodiment includes：First battery patrols
Examine instrument 15, the second battery data logging device 16, AC network 20, three port charge-discharge machines 30 and system monitor 40；Further include
One charger 17 and the second charger 18, wherein,
First battery data logging device 15, is connected with the first storage battery group 13, calculates the residue electricity of the first storage battery group 13 in real time
The battery information of the first storage battery group 13 of amount and detection, and export the first testing result；First testing result includes first and stores
The remaining capacity and detection information of battery pack 13.
It is to be appreciated that by real-time detection of first battery data logging device 15 to the first storage battery group 13, and stored first
When battery pack 13 is discharged, the remaining capacity of the first storage battery group 13 can be calculated in real time, detect each single-unit in the first storage battery group 13
The voltage of battery, and in real time upload the information of voltage of each single battery in the remaining capacity calculated and the first storage battery group 13
To system monitor 40, single battery abnormal in the first storage battery group 13 not only can effectively, be reliably detected, but also can be real
When grasp the situation of its storing electricity.
Second battery data logging device 16, is connected with the second storage battery group 14, calculates the residue electricity of the second storage battery group 14 in real time
The battery information of the second storage battery group 14 of amount and detection, exports the second testing result；Second testing result includes the second electric power storage
The remaining capacity and detection information of pond group 14.
It is to be appreciated that by real-time detection of second battery data logging device 16 to the second storage battery group 14, and stored second
When battery pack 14 is discharged, the remaining capacity of the second storage battery group 14 can be calculated in real time, detect each single-unit in the second storage battery group 14
The voltage of battery, and in real time upload the information of voltage of each single battery in the remaining capacity calculated and the second storage battery group 14
To system monitor 40, single battery abnormal in the second storage battery group 14 not only can effectively, be reliably detected, but also can be real
When grasp the situation of its storing electricity.
AC network 20, is connected with three port charge-discharge machines 30, provides alternating current for DC power system, and store first
13 or second storage battery group 14 of battery pack electric discharge maintenance process in, by three port charge-discharge machines 30 make the first storage battery group 13 or
Second storage battery group 14 is discharged to AC network 20.
Three port charge-discharge machines 30, respectively with the first storage battery group 13, the second storage battery group 14, system monitor 40, with
And AC network 20 connects.Preferably, in the present embodiment, three port charge-discharge machines 30 are provided with three ports, are respectively first
DC port A, the second DC port B and AC port C, and three ports are in working condition convertible port.Direct current
During power-supply system normal operation, three port charge-discharge machines 30 are in stand-by state.
Wherein, the first DC port A is connected with the first dc bus 11, realizes that three ports are filled by the first dc bus 11
The connection of 30 and first storage battery group 13 of Electrical Discharge Machine.Second DC port B is connected with the second dc bus 12, passes through the second direct current
Busbar 12 realizes the connection of three port charge-discharge machines 30 and the second storage battery group 14.AC port C is connected with AC network 20, is led to
Cross the connection that AC port C realizes three port charge-discharge machines 30 and AC network 20.Further, three port charge-discharge machines 30 can
Communicate with system monitor 40, the communication of RS485 or CAN realizations between the two can be used.
The three port charge-discharge machines 30 of the present embodiment are internally provided with isolating transformer, and three are realized by the isolating transformer
It is mutually isolated between port.
It should be noted that when DC power system normal operation, three port charge-discharge machines 30 are in stand-by state, this
When, the first DC port A and the second DC port B are all set to input port, and AC port C is then arranged to latch like
State, if when the first charger 17 or the second 18 failure of charger, three port charge-discharge machines 30, which can automatically engage, substitutes the of failure
One charger 17 or the second charger 18 work (at this time, AC port C is arranged to input port, the first DC port A or
Second DC port B is arranged to output port)；When the first storage battery group 13, which need to carry out electric discharge, to be safeguarded, the first DC port A
It is arranged to input port, the second DC port B is arranged to blocking, and AC port C is arranged to output port.Instead
It, when the second storage battery group 14, which need to carry out electric discharge, to be safeguarded, the first DC port A is arranged to blocking, the second DC terminal
Mouth B is arranged to input port, and AC port C is arranged to output port.
First charger 17, is connected with the first dc bus 11, AC network 20 respectively.Normally transported in DC power system
During row, be the first dc bus 11 on load supplying and be that the first storage battery group 13 supplements electricity, the first storage battery group 13 into
When row electric discharge is safeguarded, safeguard that control instruction changes the output voltage of itself and makes it below first according to what system monitor 40 was sent
The terminal voltage of storage battery group 13, offer condition is safeguarded for the electric discharge of the first storage battery group 13.It is to be appreciated that the first charger 17
It can be made of electric operation power with high-frequency switching power supply module and machine, its capacity is according to the capacity of the first storage battery group 13 and the
Load on one dc bus 11 is configured.Usually, when the first charger 17 charges for the first storage battery group 13, exist
Fill and floating charge pattern.In addition, the communication between the first charger 17 and system monitor 40 can be realized by RS485 or CAN.
Second charger 18, is connected with the second dc bus 12, AC network 20 respectively.Normally transported in DC power system
During row, be the second dc bus 12 on load supplying and be that the second storage battery group 14 supplements electricity, the second storage battery group 14 into
When row electric discharge is safeguarded, safeguard that control instruction changes the output voltage of itself and makes it below second according to what system monitor 40 was sent
The terminal voltage of storage battery group 14, offer condition is safeguarded for the electric discharge of the second storage battery group 14.It is to be appreciated that the second charger 18
It can be made of electric operation power with high-frequency switching power supply module and machine, its capacity is according to the capacity of the second storage battery group 14 and the
Load on two dc bus 12 is configured.Usually, when the second charger 18 charges for the second storage battery group 14, exist
Fill and floating charge pattern.In addition, the communication between the second charger 18 and system monitor 40 can be realized by RS485 or CAN.
System monitor 40, respectively with three port charge-discharge machines 30, the first battery data logging device 15 and the second battery data logging device
16 connections, for real-time reception and handle the first battery data logging device 15 or the first detection knot of the second battery data logging device 16 upload
Fruit, the second testing result, and when the first storage battery group 13 or the second storage battery group 14 meet maintenance condition, according to preset rules
Output is corresponding to safeguard control instruction, starts three port charge-discharge machines 30, realizes to the first storage battery group 13 or the second storage battery
The electric discharge of group 14 is safeguarded.
For example, when the first storage battery group 13 meets maintenance condition, system monitor 40 is therein according to being set in advance in
Maintenance period, maintenance time are sent to three port charge-discharge machines 30, the first charger 17 safeguards control instruction, the first charger 17
Output voltage be adjusted to the terminal voltage less than the first storage battery group 13, for the first storage battery group 13 electric discharge safeguard bar is provided
Part, three port charge-discharge machines 30 receive safeguard control instruction after, the first DC port A is arranged to input port, second is straight
Flow port B is arranged to blocking, and AC port C is arranged to output port, and three port charge-discharge machines 30 are activated, and pass through three
Port charge-discharge machine 30 makes the first storage battery group 13 discharge to AC network 20, when reaching the discharge off condition of setting, is
System monitor 40 sends corresponding control instruction and three port charge-discharge machines 30 is in charged state, with to the first storage battery group 13
Boost charge；Or system monitor 40 can also control and close three port charge-discharge machines 30, by controlling the first charger 17
For 13 boost charge of the first storage battery group.
In addition, in 13 discharge process of the first storage battery group, if finding 13 abnormal state of the first storage battery group or alternating current
Source dead electricity, system monitor 40 terminate electric discharge and safeguard immediately, and by controlling three port charge-discharge machines 30 automatically by the second electric power storage
The electric energy transfer of pond group 14 makes the electric energy of two group storage battery groups keep close to the first storage battery group 13.
To sum up, the accumulator on-line maintenance system based on three port charge-discharge machines of the utility model embodiment can be by pre-
The storage battery group on-line maintenance strategy (i.e. foregoing preset rules) being located in system monitor 40, by system monitor 40 certainly
The dynamic on-line maintenance for realizing storage battery group, storage battery group is all without departing from DC power supply system in the maintenance process of whole storage battery group
System, and if AC network 20 has a power failure in discharge process, can be shifted high-pressure side energy automatically by three port charge-discharge machines 30
To low-pressure end so that two group storage battery group automatic equalizations, the automatic on-line for realizing storage battery group are safeguarded.
It should be noted that in 14 each comfortable discharge process of the first storage battery of the utility model group 13 and the second storage battery group
It is mutually independent, is independent of each other.Therefore, the utility model can be free according to actual conditions to the on-line maintenance of storage battery group
Select the depth of discharge of each storage battery group itself.
As shown in Fig. 2, the accumulator on-line maintenance system based on three port charge-discharge machines of the present embodiment further includes：
Bus connection switch K0, bus connection switch K0 are arranged between the first dc bus 11 and the second dc bus 12, for controlling
Make the first dc bus 11 and the second dc bus 12 connect or disconnection.
First switch K1, is arranged between the first dc bus 11 and the first storage battery group 13, controls the first dc bus
11 and first storage battery group 13 connection or disconnection.
Second switch K2, is arranged between the second dc bus 12 and the second storage battery group 14, controls the second dc bus
12 and second storage battery group 14 connection or disconnection.
3rd switch K3, is arranged between the first DC port A of three port charge-discharge machines 30 and the first dc bus 11；
4th switch K4, is arranged between the second DC port B of three port charge-discharge machines 30 and the second dc bus 12.
5th switch K5, is arranged between the first charger 17 and the first dc bus 11, the first charger 17 of control with
Connection or disconnection between first dc bus 11.
6th switch K6, is arranged between the second charger 18 and the second dc bus 12, the second charger 18 of control with
Connection or disconnection between second dc bus 12.
During system normal operation, first switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, the 5th switch
The switches of K5 and the 6th K6 is in closure state, and bus connection switch K0 is off.When needing to the first storage battery group 13
Or the second storage battery group 14 when carrying out electric discharge and safeguarding, first switch K1 and second switch K2 are kept closed, i.e., in storage battery
In the electric discharge maintenance process of group, storage battery group is not departed from DC power supply, realizes that really online electric discharge is safeguarded.
Below by taking the electric discharge of the first storage battery group 13 is safeguarded as an example, shown in explanatory drawin 2 based on three port charge-discharge machines
The control principle of accumulator on-line maintenance system：
Assuming that DC power system is 220VDC systems, the configuration of the first storage battery group 13 and the second storage battery group 14 is complete
Unanimously, even charging voltage 242VDC, float charge voltage 230VDC, the electric discharge of the first storage battery group 13 and the second storage battery group 14 are whole
Only voltage is 198VDC；When system monitor 40 detects the terminal voltage drop of the first storage battery group 13 or the second storage battery group 14
It is low to send the control instruction for terminating to safeguard when arriving 198VDC, terminate putting for the first storage battery group 13 or the second storage battery group 14
Electricity is safeguarded；Wherein, the terminal voltage of the first storage battery group 13 or the second storage battery group 14 is by the first battery data logging device 15, the second battery
Logging 16, which corresponds to, detects and is uploaded to system monitor 40.
During DC power system normal operation, the first storage battery group 13 and the second storage battery group 14 are in floating charge state,
Terminal voltage is 230VDC, and the first DC port A and the second DC port B of three port charge-discharge machines 30 are arranged on input
Port, AC port C are in blocking, i.e., three port charge-discharge machines 30 are in stand-by state at this time.
When the first storage battery group 13 meets on-line maintenance condition, system monitor 40, which issues, safeguards the first storage battery group 13
Instruction, the first charger 17 receives the instruction and itself output voltage is adjusted to final discharging voltage 198VDC, for the
The electric discharge of one storage battery group 13 creates conditions；After three port charge-discharge machines 30 receive the instruction, its first DC port A is set
For input port, AC port C is arranged to output port, and the second DC port B is arranged to blocking, so far three port charge and discharge
Motor 30 is activated, and the first storage battery group 13 can be discharged by three port charge-discharge machines 30 to AC network 20.In the first electric power storage
In 13 discharge process of pond group, the first battery data logging device 15 calculates the remaining capacity of the first storage battery group 13 and detects first in real time to be stored
The voltage of each single battery in battery pack 13, while testing result is uploaded to system monitor 40, system monitor in real time
40 detection informations that the first battery data logging device 15 of processing uploads in real time.
When the terminal voltage for detecting the first storage battery group 13 is reduced to 198VDC, system monitor 40 sends end and safeguards
Instruction, at this time, the first storage battery group 13 requires supplementation with charging, and system monitor 40 may be selected the first charger 17 and be stored for first
13 boost charge of battery pack, can also select three port charge-discharge machines 30 as 13 boost charge of the first storage battery group.
Assuming that it is 13 boost charge of the first storage battery group, at this time, three that system monitor 40, which selects three port charge-discharge machines 30,
The AC port C of port charge-discharge machine 30 is arranged to input port, and the first DC port A is arranged to output port, and
The output voltage of one DC port A is set to even charging voltage 242VDC, the second DC port B and remains blocking.When the first storage
After battery pack 13 is fully charged, recover normal operating status, so far, the maintenance process of the first storage battery group 13 terminates.
In addition, in the electric discharge maintenance process of the first storage battery group 13, if find 13 abnormal state of the first storage battery group or
AC power dead electricity, system monitor 40 can terminate discharge process immediately and give a warning.Secondly, put in the first storage battery group 13
In electric process, since its charge capacity decreases, three port charge-discharge machines 30 are automatically by the electric energy of the second storage battery group 14
The first storage battery group 13 is transferred to, so that the electric energy of the first storage battery group 13 and the second storage battery group 14 keeps close.
As shown in figure 3, the utility model additionally provides a kind of accumulator on-line maintenance system based on three port charge-discharge machines
System, including host computer, and the foregoing accumulator on-line maintenance system based on three port charge-discharge machines.Host computer can pass through system
Monitor 40 realizes the communication with foregoing on-line maintenance system.
Specifically, host computer can actively send maintenance instruction to system monitor 40, start the maintenance to storage battery, be
After system monitor 40 receives the maintenance instruction of host computer transmission, that is, be converted to and safeguard that control instruction is issued to three ports accordingly
Charge-discharge machine 30, the first charger 17 or the second charger 18, while the storage that host computer also acceptable system monitor 40 returns
The on-line maintenance information of battery pack.
Above example is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, the scope of protection of the utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model claims scope is done, should all belong to the utility model claims covers model
Enclose.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (10)
- A kind of 1. accumulator on-line maintenance system based on three port charge-discharge machines, for safeguarding the electric power storage in DC power system Pond, wherein, DC power system includes the first storage battery group and the second storage battery group, it is characterised in that the on-line maintenance system System includes：First battery data logging device, is connected with the first storage battery group, calculate in real time the first storage battery group remaining capacity, The battery information of the first storage battery group is detected, exports the first testing result；First testing result includes：Described first The remaining capacity and detection information of storage battery group；Second battery data logging device, is connected with the second storage battery group, calculate in real time the second storage battery group remaining capacity, The battery information of the second storage battery group is detected, exports the second testing result；Second testing result includes：Described second The remaining capacity and detection information of storage battery group；AC network, alternating current is provided for the DC power system；Three port charge-discharge machines, are connected with the first storage battery group, the second storage battery group and the AC network respectively, Condition is provided for the on-line maintenance of the first storage battery group or the second storage battery group, and by the first storage battery group or second The discharge capacity of storage battery group is exported to the AC network；System monitor, when the first storage battery group or the second storage battery group meet on-line maintenance condition, according to default rule Then output safeguards that control instruction starts three port charge-discharge machine so that the first storage battery group or second storage battery Group is discharged to the AC network, while first testing result or the second testing result are handled.
- 2. the accumulator on-line maintenance system according to claim 1 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：The first dc bus being connected with the first storage battery group；The second dc bus being connected with the second storage battery group；Bus connection switch is equipped between first dc bus and the second dc bus, the bus connection switch control described first is straight Flow the connection or disconnection of busbar and the second dc bus.
- 3. the accumulator on-line maintenance system according to claim 2 based on three port charge-discharge machines, it is characterised in that institute State three port charge-discharge machines and be equipped with the first DC port, the second DC port and AC port；First DC port is connected with first dc bus, second DC port and second dc bus Connection, the AC port connect the AC network, and first DC port, the second DC port and AC port It is in working condition convertible port.
- 4. the accumulator on-line maintenance system according to claim 3 based on three port charge-discharge machines, it is characterised in that institute State in three port charge-discharge machines and be equipped with isolating transformer, be used for realization first DC port, the second DC port, Yi Jijiao It is mutually isolated between flow port.
- 5. the accumulator on-line maintenance system according to claim 2 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：First charger, is connected with first dc bus, AC network respectively, discharges in the first storage battery group When safeguarding, receive the system monitor transmission safeguards that control instruction makes the output voltage of itself be less than first storage battery The terminal voltage of group.
- 6. the accumulator on-line maintenance system according to claim 5 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：Second charger, is connected with second dc bus, AC network respectively, discharges in the second storage battery group When safeguarding, receive the system monitor transmission safeguards that control instruction makes the output voltage of itself be less than second storage battery The terminal voltage of group.
- 7. the accumulator on-line maintenance system according to claim 2 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：First switch, is arranged between first dc bus and the first storage battery group, controls first direct current female The connection or disconnection of line and the first storage battery group；Second switch, is arranged between second dc bus and the second storage battery group, controls second direct current female The connection or disconnection of line and the second storage battery group.
- 8. the accumulator on-line maintenance system according to claim 3 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：3rd switch, is arranged between the first DC port and the first dc bus of three port charge-discharge machine；4th switch, is arranged between the second DC port and the second dc bus of three port charge-discharge machine.
- 9. the accumulator on-line maintenance system according to claim 6 based on three port charge-discharge machines, it is characterised in that institute On-line maintenance system is stated to further include：5th switch, is arranged between first charger and the first dc bus, controls first charger and first Connection or disconnection between dc bus；6th switch, is arranged between second charger and the second dc bus, controls second charger and second Connection or disconnection between dc bus.
- 10. according to accumulator on-line maintenance system of the claim 1-9 any one of them based on three port charge-discharge machines, it is special Sign is, including host computer, and the host computer is realized by the system monitor to be led to the data of the on-line maintenance system Letter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110492600A (en) * | 2019-09-06 | 2019-11-22 | 智洋创新科技股份有限公司 | Substation's novel intelligent DC power system and maintaining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492600A (en) * | 2019-09-06 | 2019-11-22 | 智洋创新科技股份有限公司 | Substation's novel intelligent DC power system and maintaining method |
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