CN211606097U - On-line discharging direct current system for mutual hot standby - Google Patents
On-line discharging direct current system for mutual hot standby Download PDFInfo
- Publication number
- CN211606097U CN211606097U CN202020035756.0U CN202020035756U CN211606097U CN 211606097 U CN211606097 U CN 211606097U CN 202020035756 U CN202020035756 U CN 202020035756U CN 211606097 U CN211606097 U CN 211606097U
- Authority
- CN
- China
- Prior art keywords
- direct current
- storage battery
- direct
- charger
- machine
- 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
- 238000007599 discharging Methods 0.000 title claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The embodiment of the utility model discloses each other is online direct current system that discharges of hot reserve, including first machine, the second machine, first storage battery and the second storage battery that charges, first storage battery with first machine connection that charges, the second storage battery with the second machine connection that charges first machine with be connected with DC/DC module on the direct current bus between the second machine that charges first machine with be connected with three-phase contravariant module group on the direct current bus between the second machine that charges, three-phase contravariant module group with DC/DC module is parallelly connected. The DC/DC module of the utility model realizes that two sections of direct current buses are mutually hot standby, improves the stability of a direct current system, and the storage battery pack does not need to be separated from the nuclear capacity of the buses; the feedback type online nuclear capacity discharge can be realized to replace the traditional discharge load nuclear capacity, and the unattended remote nuclear capacity can be realized without heating.
Description
Technical Field
The embodiment of the utility model provides a relate to the direct current technical field that discharges, concretely relates to each other is online direct current system that discharges of hot reserve.
Background
The conventional main wiring of the power station direct current system is a double-direct-current bus configuration mode, each section of direct current bus is provided with a charger and a storage battery pack, and the configuration mode has the following defects:
1. and (3) carrying out capacity checking on the storage battery pack by separating from the direct current buses, when a certain group of storage battery packs need capacity checking tests, closing a bus tie switch 7ZK between two sections of direct current buses, and then quitting the storage battery pack and a charger which need capacity checking. Therefore, the direct current loads of the whole station are hung on the other group of the charging machine and the storage battery pack which do not exit the direct current system, and when the charging machine and the storage battery pack which do not exit the direct current system fail, all the direct current loads have the risk of voltage loss.
2. The whole-course monitoring is needed in the discharging process, and a discharging load is needed to be externally connected when the storage battery core group is checked for capacity in a conventional direct current system main wiring configuration mode. The discharging mode is that a plurality of electric furnace wires are used as analog loads to discharge the storage battery, electric energy is consumed by adopting a resistor during discharging, the electric energy is converted into heat energy to be released, and forced heat dissipation is carried out by adopting a fan.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the present invention provides an online discharging dc system for mutual hot standby to solve the problems in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the embodiment of the utility model provides an aspect of each other is hot standby's direct current system that discharges on line is provided, including first machine, the second machine that charges, first storage battery and second storage battery, first storage battery with first machine that charges is connected, second storage battery with the second machine that charges is connected first machine that charges with be connected with DC/DC module on the direct current bus between the second machine that charges first machine with be connected with three-phase contravariant module group on the direct current bus between the second machine that charges, three-phase contravariant module group with DC/DC module is parallelly connected.
As a preferred scheme of the present invention, a backward diode Q1 and a backward diode Q2 are connected in series between the positive dc bus and the positive electrode of the battery pack.
As a preferable aspect of the present invention, the reverse diode Q1 and the reverse diode Q2 are respectively connected in parallel to the normally closed electric operation switch K1 and the normally closed electric operation switch K2.
As an optimal scheme the three-phase contravariant module group with normally open direct current contactor K2 and normally open direct current contactor K3 are connected respectively to the negative pole end and the positive terminal of first battery the three-phase contravariant module group with normally open direct current contactor K5 and normally open direct current contactor K6 are connected respectively to the negative pole end and the positive terminal of second battery.
As an optimized scheme of the utility model, the three-phase contravariant module group with first battery with be connected with direct current air switch K9 and direct current air switch K10 between the second battery respectively.
As an optimal scheme the first machine that charges with the second is provided with manual female gang switch 7ZK between the machine that charges.
As an optimized scheme of the utility model, the DC/DC module with first machine that charges with be connected with direct current air switch K7 and direct current air switch K8 between the second machine that charges respectively.
As an optimized scheme of the present invention, the three-phase inverter module group and the DC/DC module all contain a controller.
As an optimized solution of the present invention, the DC/DC module is a bidirectional isolation DC/DC module.
The utility model discloses an embodiment has following advantage:
the DC/DC module of the utility model realizes that two sections of DC buses are mutually hot standby, improves the stability of the DC system, and the storage battery does not need to be separated from the nuclear capacity of the buses; the feedback type online nuclear capacity discharge can be realized to replace the traditional discharge load nuclear capacity, and the unattended remote nuclear capacity can be realized without heating.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a topological diagram of two groups of storage battery packs during float charging according to an embodiment of the present invention;
fig. 2 is a topology diagram of the first battery pack during discharging provided by the embodiment of the present invention.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a each other is hot reserve online direct current system that discharges, including first machine, the second machine that charges, first storage battery and the second storage battery, first storage battery with first machine that charges is connected, the second storage battery with the second machine that charges is connected first machine that charges with be connected with DC/DC module on the direct current bus between the second machine that charges first machine with be connected with three-phase contravariant module group on the direct current bus between the second machine that charges, three-phase contravariant module group with DC/DC module is parallelly connected.
A reverse diode Q1 and a reverse diode Q2 are connected in series between the positive direct current bus and the positive electrode of the storage battery pack; a normally closed electric operating switch K1 and a normally closed electric operating switch K2 are respectively connected in parallel to the reverse diode Q1 and the reverse diode Q2; the three-phase inversion module group and the negative end and the positive end of the first storage battery are respectively connected with a normally open direct current contactor K2 and a normally open direct current contactor K3, and the three-phase inversion module group and the negative end and the positive end of the second storage battery are respectively connected with a normally open direct current contactor K5 and a normally open direct current contactor K6.
A direct-current air switch K9 and a direct-current air switch K10 are respectively connected between the three-phase inverter module group and the first storage battery and the second storage battery; a manual bus coupler switch 7ZK is arranged between the first charger and the second charger; a direct-current air switch K7 and a direct-current air switch K8 are respectively connected between the DC/DC module and the first charger and the second charger; the three-phase inversion module group and the DC/DC module both comprise controllers; the DC/DC module is a bidirectional isolation DC/DC module.
In normal operation, as shown in fig. 1, K1 and K4 close short circuits Q1 and Q2; k9, K10, K7 and K8 are closed, and K2, K3, K5 and K6 are normally open. The charger charges the storage battery pack through the direct current bus and simultaneously supplies power to the load on the direct current bus; the normally open inversion module loops of K2, K3, K5 and K6 are disconnected, so that the direct current system can safely operate in a floating state.
Wherein, DC/DC module and controller: the backup power automatic switching device is equivalent to a backup power automatic switching device of two sections of direct current systems, and is communicated with monitors of the two sections of direct current systems when the direct current output of a charger in one section of direct current system is abnormal and faults such as open circuit exist in a storage battery pack, if no fault signal is sent out by the monitor of the other section of direct current bus, the other section of direct current bus is immediately started to supply power to the direct current bus of the fault section, the stability of the direct current system is improved, and the backup power automatic switching device also serves as backup support for the on-line nuclear capacity discharge of the storage battery pack under unattended monitoring.
Three-phase contravariant module group and controller: the direct current system monitoring device replaces a discharging load of a traditional storage battery pack core capacitor, and simultaneously comprises an inverter controller which is communicated with a direct current system monitor. When the storage battery pack needs to be subjected to capacity check discharge, the inversion controller controls the inversion module to discharge at 0.1C, the electric energy of the storage battery pack is inverted back to the power grid, the heating phenomenon does not occur, and the storage battery pack can be subjected to capacity check without being monitored by people.
As shown in fig. 2, the first storage battery pack needs to discharge by the nuclear capacity, K1 is disconnected, K2 and K3 are closed, the charging current of the first charging machine is prevented from flowing to the first storage battery pack by using the reverse cut-off characteristic of the diode Q1, the first charging machine cannot charge the first storage battery pack, the first storage battery pack discharges through the inverter module, if the first charging machine and the DC/DC module both fail during the discharging process, the reverse diode Q1 is instantly conducted in the forward direction, the first storage battery pack continues to supply power to the direct current system load, and the nuclear capacity of the storage battery pack does not need to be separated from the system and is directly connected with the nuclear capacity, so that the reliable operation of the direct current system is guaranteed.
The DC/DC module of the utility model realizes that two sections of DC buses are mutually hot standby, improves the stability of the DC system, and the storage battery does not need to be separated from the nuclear capacity of the buses; the feedback type online nuclear capacity discharge can be realized to replace the traditional discharge load nuclear capacity, and the unattended remote nuclear capacity can be realized without heating.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. The online discharge direct-current system is characterized by comprising a first charger, a second charger, a first storage battery pack and a second storage battery pack, wherein the first storage battery pack is connected with the first charger, the second storage battery pack is connected with the second charger, a DC/DC module is connected on a direct-current bus between the first charger and the second charger, a three-phase inversion module group is connected on the direct-current bus between the first charger and the second charger, and the three-phase inversion module group is connected with the DC/DC module in parallel.
2. The on-line discharging DC system as claimed in claim 1, wherein a reverse diode Q1 and a reverse diode Q2 are connected in series between the positive DC bus and the positive pole of the battery pack.
3. An on-line discharge DC system with mutual hot standby according to claim 2, characterized in that the normally closed switch K1 and the normally closed switch K2 are respectively connected in parallel to the reverse diode Q1 and the reverse diode Q2.
4. The on-line discharging direct current system as claimed in claim 1, wherein a normally open direct current contactor K2 and a normally open direct current contactor K3 are connected to the negative terminal and the positive terminal of the three-phase inversion module set and the first battery respectively, and a normally open direct current contactor K5 and a normally open direct current contactor K6 are connected to the negative terminal and the positive terminal of the three-phase inversion module set and the second battery respectively.
5. The on-line discharging direct-current system mutually in hot standby according to claim 1, wherein a direct-current air switch K9 and a direct-current air switch K10 are respectively connected between the three-phase inverter module group and the first storage battery and the second storage battery.
6. The on-line discharging direct-current system mutually as hot standby according to claim 1, characterized in that a manual bus-bar switch 7ZK is arranged between the first charger and the second charger.
7. The online discharge direct-current system as claimed in claim 1, wherein a direct-current air switch K7 and a direct-current air switch K8 are connected between the DC/DC module and the first charger and the second charger, respectively.
8. The on-line discharging DC system as claimed in claim 1, wherein the three-phase inverter module set and the DC/DC module each comprise a controller.
9. The online discharge DC system of claim 1, wherein the DC/DC modules are bidirectional isolated DC/DC modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020035756.0U CN211606097U (en) | 2020-01-08 | 2020-01-08 | On-line discharging direct current system for mutual hot standby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020035756.0U CN211606097U (en) | 2020-01-08 | 2020-01-08 | On-line discharging direct current system for mutual hot standby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211606097U true CN211606097U (en) | 2020-09-29 |
Family
ID=72600985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020035756.0U Active CN211606097U (en) | 2020-01-08 | 2020-01-08 | On-line discharging direct current system for mutual hot standby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211606097U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130094A (en) * | 2020-01-08 | 2020-05-08 | 广东电网有限责任公司 | On-line discharging direct current system for mutual hot standby |
| CN112769193A (en) * | 2021-01-28 | 2021-05-07 | 杭州高特电子设备股份有限公司 | Storage battery pack capacity online protection system and online protection method thereof |
-
2020
- 2020-01-08 CN CN202020035756.0U patent/CN211606097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130094A (en) * | 2020-01-08 | 2020-05-08 | 广东电网有限责任公司 | On-line discharging direct current system for mutual hot standby |
| CN112769193A (en) * | 2021-01-28 | 2021-05-07 | 杭州高特电子设备股份有限公司 | Storage battery pack capacity online protection system and online protection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111130094A (en) | On-line discharging direct current system for mutual hot standby | |
| CN111987791B (en) | Battery module control device and method, power supply equipment and system | |
| CN106787040A (en) | DC power system | |
| CN211606097U (en) | On-line discharging direct current system for mutual hot standby | |
| CN111987792B (en) | Power supply device and power supply method thereof | |
| CN114204658A (en) | Storage battery pack online capacity checking system | |
| CN219801959U (en) | Energy storage conflux cabinet and use energy storage system of this energy storage conflux cabinet | |
| CN117578539A (en) | Energy storage system | |
| CN117411117A (en) | DC power supply module and system, operation and maintenance control method of system and intelligent control platform | |
| CN114884168B (en) | Transformer substation direct current system based on lithium iron phosphate storage battery | |
| CN110867946A (en) | Alternating current-direct current hybrid power supply integrated power supply | |
| CN115912441A (en) | PCS system and control method thereof | |
| CN113193646B (en) | Power supply device, method and system | |
| CN113036902A (en) | Uninterrupted online switching lithium battery energy storage system | |
| CN206259735U (en) | DC power system | |
| CN217087556U (en) | Power supply device and data center | |
| CN221150999U (en) | Measurement and control module for intelligent charge and discharge and charge and discharge system adopting module | |
| CN113437791B (en) | Photovoltaic energy storage system and control method thereof | |
| CN219960166U (en) | Battery power supply device and power supply system | |
| CN221727934U (en) | Energy storage battery module cut-off control system | |
| CN115954991B (en) | Online contravariant charge-discharge device of storage battery | |
| CN216564621U (en) | UPS backup power supply | |
| CN220570342U (en) | Battery device with multiple power storage modules connected in parallel and power supply system | |
| CN218472805U (en) | Energy storage system | |
| CN221757355U (en) | Electric framework and battery control system of electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |