CN105449843A - Power supply system for parallel smart battery module - Google Patents
Power supply system for parallel smart battery module Download PDFInfo
- Publication number
- CN105449843A CN105449843A CN201610013020.1A CN201610013020A CN105449843A CN 105449843 A CN105449843 A CN 105449843A CN 201610013020 A CN201610013020 A CN 201610013020A CN 105449843 A CN105449843 A CN 105449843A
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- CN
- China
- Prior art keywords
- battery module
- smart battery
- auxiliary capacitor
- coupling smart
- feeder
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- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The application provides a power supply system for a parallel smart battery module. The power supply system comprises a parallel smart battery module set, a feeder switch and an auxiliary capacitor, wherein the input end of the parallel smart battery module set is connected with a power grid; the output end of the parallel smart battery module set is connected with a feeder branch; one end of the feeder switch is connected with the feeder branch; the other end of the feeder switch is connected with a load; one end of the auxiliary capacitor is connected with the feeder branch; the other end of the auxiliary capacitor is grounded; the capacity C of the auxiliary capacitor is equal to [delta]Q/[delta]U equal to I<dmax>*T<tz>/[delta]U; and the auxiliary capacitor is used for providing failure currents capable of ensuring tripping of the feeder switch when the parallel smart battery module set has no output currents. When the short circuit occurs in the feeder branch to cause cut-off of supply of the parallel smart battery module set and the feeder switch still does not trip, the auxiliary capacitor can provide the failure currents to the feeder branch, as a result, the fact that the feeder switch can normally trip under the condition of not being powered by the parallel smart battery module set is ensured.
Description
Technical field
The present invention relates to substation equipment DC power-supply system technical field, is specifically related to a kind of also coupling Smart battery module electric power system.
Background technology
Fig. 1 is the schematic diagram that in prior art, the special and coupling Smart battery module of power communication is directly mounted on DC bus, and the DC-DC module of coupling Smart battery module 100 is as protection power device, and short-circuit protection generally uses hardware protection mode again.When feeder line short circuit; due to described and coupling Smart battery module is directly mounted on ac bus L1; the problem that short circuit trip time of the short-circuit protection time and feeder switch K1 that therefore there is DC-DC module mates; if when the short-circuit protection of DC-DC module has precedence over the short circuit trip operation of feeder switch; there will be because also coupling Smart battery module no current exports; feeder switch can not be tripped in short circuit, cause the unresectable problem of short trouble feeder line branch road.
Summary of the invention
In view of this; the embodiment of the present invention provides a kind of and coupling Smart battery module electric power system; to solve in prior art; when adopt and coupling Smart battery module be directly mounted on DC bus DC load is powered time; due to and in coupling Smart battery module, the short-circuit protection of DC-DC module has precedence over the short circuit trip operation of feeder switch time; feeder switch can not be tripped in short circuit, cause the unresectable problem of short trouble feeder line branch road.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of also coupling Smart battery module electric power system, comprising:
The also coupling Smart battery module group that input is connected with electrical network, described and output that is coupling Smart battery module group is connected with feeder line branch road;
The feeder switch that one end is connected with described feeder line branch road, the other end of described feeder switch is connected with load;
One end is connected with described feeder line branch road, the auxiliary capacitor of other end ground connection, and described auxiliary capacitor is used for, when the output of described and coupling Smart battery module group no current, providing the fault current that can ensure that described feeder switch is threaded off;
Capacity C=△ Q/ △ the U=I of described auxiliary capacitor
dmax* T
tz/ △ U, the maximum pd quantity of described auxiliary capacitor C, described I
dmaxfor feeder line short circuit maximum fault current, described T
tzfor auxiliary capacitor maximum discharge time, described T
tz=tz*n, described tz are for adopting described I
dmaxthe maximum time of the maintenance switch trip that contrast switch trip time graph obtains, described n is safety factor, and described △ U is the voltage drop value that the power input of described load allows.
Preferably, above-mentioned and in coupling Smart battery module electric power system, described auxiliary capacitor comprises:
Multiple sub-auxiliary capacitor, parallel with one another between described multiple sub-auxiliary capacitor.
Preferably, above-mentioned and in coupling Smart battery module electric power system, the withstand voltage of described auxiliary capacitor is not less than 300V.
Preferably, above-mentioned and in coupling Smart battery module electric power system, described n is not less than 1.2.
Preferably, above-mentioned and in coupling Smart battery module electric power system, described △ U is not less than 55V.
Preferably, above-mentioned and in coupling Smart battery module electric power system, described and coupling Smart battery module group comprises multiple and coupling Smart battery module, described multiple and parallel with one another between coupling Smart battery module.
Preferably, above-mentioned and in coupling Smart battery module electric power system, each described and the rated output power of coupling Smart battery module is not less than 500W.
Based on technique scheme, the also coupling Smart battery module electric power system that the embodiment of the present invention provides, described feeder line branch road is provided with auxiliary capacitor, the capacity C=△ Q/ △ U=I of described auxiliary capacitor
dmax* T
tz/ △ U, therefore, if after described in causing when being short-circuited in described feeder line branch road, also coupling Smart battery module group is stopped power supply, when described feeder switch is threaded off not yet, described auxiliary capacitor can provide fault current to described feeder line branch road, thus ensure that described feeder switch when without the need to described and coupling Smart battery module group is powered, normally can perform trip operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the schematic diagram that in prior art, the special and coupling Smart battery module of power communication is directly mounted on DC bus;
Fig. 2 a kind of and structural representation of coupling Smart battery module electric power system disclosed in the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be directed to the problems referred to above of the prior art, this application discloses a kind of also coupling Smart battery module electric power system, see Fig. 2, comprising:
The also coupling Smart battery module group 100 that input is connected with electrical network L1, the described and output of coupling Smart battery module group 100 is connected with feeder line branch road L2;
The feeder switch K1 that one end is connected with described feeder line branch road L2, the other end of described feeder switch K1 is connected with load R1;
One end is connected with described feeder line branch road L2, the auxiliary capacitor C of other end ground connection, and described auxiliary capacitor C is used for, when the output of described and coupling Smart battery module group 100 no current, providing the fault current that can ensure that described feeder switch K1 threads off;
Capacity C=△ Q/ △ the U=I of described auxiliary capacitor
dmax* T
tz/ △ U, described I
dmaxfor feeder line short circuit maximum fault current, described T
tzfor auxiliary capacitor maximum discharge time, described T
tz=tz*n, described tz are for adopting described I
dmaxthe maximum time of the maintenance switch trip that contrast switch trip time graph obtains, described n is safety factor, and described △ U is the voltage drop value that the power input of described load allows.
When disclosed in employing the above embodiments of the present application, also coupling Smart battery module electric power system is powered to load equipment, if when being short-circuited in described feeder line branch road L2, after described and coupling Smart battery module group 100 is stopped power supply, when described feeder switch K1 threads off not yet, described auxiliary capacitor C can provide fault current to described feeder line branch road L2, certainly, in order to ensure that described auxiliary capacitor C can provide enough fault current to ensure that described feeder switch K1 is when without the need to described and coupling Smart battery module group 100 power supply, normally can perform trip operation, the capacity C of described auxiliary capacitor satisfies condition: C=△ Q/ △ U=I
dmax* T
tz/ △ U.
Be understandable that, enough fault currents can be provided to make described auxiliary capacitor C, in technical scheme disclosed in the above embodiments of the present application, described auxiliary capacitor C can be formed by multiple independent Capacitance parallel connection, its type can be chosen voluntarily according to user's request, and such as it can be electrochemical capacitor.
Be understandable that, the auxiliary capacitor examined be set, utilize the charge discharge that described auxiliary capacitor C stores, to provide fault current, adopt the method to control feeder switch when threading off, described auxiliary capacitor C does not need too high withstand voltage, and the withstand voltage of described auxiliary capacitor C is set to be not less than 300V usually.
Be understandable that, in order to ensure the reliability that described feeder switch is threaded off, the value of described safety factor n can be set to be not less than 1.2.
Wherein, state described in the above embodiments of the present application and multiple and coupling Smart battery module can be comprised in coupling Smart battery module group 100, described multiple and parallel with one another between coupling Smart battery module.Described and coupling Smart battery module blood selects Tai Ang energy science and technology limited company to produce model is the also coupling Smart battery module of IPM-PB22002.
Be understandable that, in transformer station direct current system, impact load derives from the impact load of switch breaker tripping and closing generation and the impact load of perception (capacitive) load access generation, as device startup.These impact loads are no more than 5 seconds according to the technical specification general time.
The application, by strengthening and the short-time withstand power of coupling Smart battery module, meets to make it requirement that system prevents load impact.Concrete, in above-described embodiment, described and the rated output power of coupling Smart battery module is 500W, designing 1 minute tolerance power is 1000W, 5 second tolerance power be 3000W.Because voltage drop scope in tolerance course is usually within-15% rated voltage, calculate by system nominal voltage DC220V, in tolerance course, voltage drop amplitude-controllable is built in more than DC187V.Due to configuration and coupling Smart battery module generally by 2 times of rated load power configuration, then actual and coupling Smart battery module 5 second tolerance power be 12 times of rated load power, empirical tests, can meet the requirement that system prevents load impact.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. and a coupling Smart battery module electric power system, it is characterized in that, comprising:
The also coupling Smart battery module group that input is connected with electrical network, described and output that is coupling Smart battery module group is connected with feeder line branch road;
The feeder switch that one end is connected with described feeder line branch road, the other end of described feeder switch is connected with load;
One end is connected with described feeder line branch road, the auxiliary capacitor of other end ground connection, and described auxiliary capacitor is used for, when the output of described and coupling Smart battery module group no current, providing the fault current that can ensure that described feeder switch is threaded off;
Capacity C=△ Q/ △ the U=I of described auxiliary capacitor
dmax* T
tz/ △ U, described △ Q are the maximum pd quantity of described auxiliary capacitor C, described I
dmaxfor feeder line short circuit maximum fault current, described T
tzfor auxiliary capacitor maximum discharge time, described T
tz=tz*n, described tz are for adopting described I
dmaxthe maximum time of the maintenance switch trip that contrast switch trip time graph obtains, described n is safety factor, and described △ U is the voltage drop value that the power input of described load allows.
2. according to claim 1 and coupling Smart battery module electric power system, it is characterized in that, described auxiliary capacitor comprises:
Multiple sub-auxiliary capacitor, parallel with one another between described multiple sub-auxiliary capacitor.
3. according to claim 1 and coupling Smart battery module electric power system, it is characterized in that, the withstand voltage of described auxiliary capacitor is not less than 300V.
4. according to claim 1 and coupling Smart battery module electric power system, it is characterized in that, described n is not less than 1.2.
5. according to claim 1 and coupling Smart battery module electric power system, it is characterized in that, described △ U is not less than 55V.
6. according to claim 1 and coupling Smart battery module electric power system, is characterized in that, described and coupling Smart battery module group comprises multiple and coupling Smart battery module, described multiple and parallel with one another between coupling Smart battery module.
7. according to claim 1 and coupling Smart battery module electric power system, is characterized in that, each described and the rated output power of coupling Smart battery module is not less than 500W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013020.1A CN105449843A (en) | 2016-01-08 | 2016-01-08 | Power supply system for parallel smart battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013020.1A CN105449843A (en) | 2016-01-08 | 2016-01-08 | Power supply system for parallel smart battery module |
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| Publication Number | Publication Date |
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| CN105449843A true CN105449843A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610013020.1A Pending CN105449843A (en) | 2016-01-08 | 2016-01-08 | Power supply system for parallel smart battery module |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130061965A (en) * | 2011-12-02 | 2013-06-12 | 현대모비스 주식회사 | Low voltage dc-dc converter for vehicle |
| CN203481883U (en) * | 2013-09-26 | 2014-03-12 | 云南电网公司临沧供电局 | Transformer station DC power system |
-
2016
- 2016-01-08 CN CN201610013020.1A patent/CN105449843A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130061965A (en) * | 2011-12-02 | 2013-06-12 | 현대모비스 주식회사 | Low voltage dc-dc converter for vehicle |
| CN203481883U (en) * | 2013-09-26 | 2014-03-12 | 云南电网公司临沧供电局 | Transformer station DC power system |
Non-Patent Citations (1)
| Title |
|---|
| 冷旭东等: "关于电力通信用DC/DC 馈线短路问题的研究", 《电力系统保护与控制》 * |
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Application publication date: 20160330 |
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