CN104459555A - Battery energy storage station DC system fault recording and collecting device - Google Patents
Battery energy storage station DC system fault recording and collecting device Download PDFInfo
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- CN104459555A CN104459555A CN201410724750.3A CN201410724750A CN104459555A CN 104459555 A CN104459555 A CN 104459555A CN 201410724750 A CN201410724750 A CN 201410724750A CN 104459555 A CN104459555 A CN 104459555A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The invention relates to a battery energy storage station DC system fault recording and collecting device which comprises a low-power AC/DC module, a plurality of current Hall elements LT and a plurality of voltage Hall elements LV. The current Hall elements LT are connected to the positive electrode of a battery energy storage station DC main circuit in series. The voltage Hall elements LV are connected to the positive electrode and a negative electrode of the battery energy storage station DC main circuit in parallel. Each battery is provided with the corresponding current Hall element LT and the corresponding voltage Hall element LV in series. All the current Hall elements LT and all the voltage Hall elements LV are arranged on a fault recording and collecting screen in a concentrated mode. The power supply input ends of the current Hall elements LT and the power supply input ends of the voltage Hall elements LV are connected with the voltage output end D1 of the low-power AC/DC module. The signal output ends of the current Hall elements LT and the signal output ends of the voltage Hall elements LV are connected with the recording signal output connecting end to form the recording signal output end D2 externally connected with a recording device. The battery energy storage station DC system fault recording and collecting device has the advantages that the manufacturing cost is low, and the unified management, convenient operation and maintenance and the like can be achieved.
Description
Technical field
The present invention relates to a kind of battery energy storage to stand erectly streaming system failure wave-recording harvester, be applicable to battery energy storage stand erectly streaming system detect safeguard, the record ripple collection of fault.Belong to field, battery energy storage station,
Background technology
At present, the application of direct current signal record ripple in transformer station, modal is be conventional substation secondary straight-flow system magnitude of voltage record ripple, and the rated voltage of record ripple work is 110V or 220V.Along with the development of UHV (ultra-high voltage), extra-high voltage direct-current transmission, flexible DC power transmission, occurred for ± 500kV, ± 800kV, ± 160kV straight-flow system major loop analog quantity record ripple research.
Battery energy storage technology as a kind of novel electrochemical energy storage technology, because the advantages such as its good environmental adaptability, energy density are high, take up an area less, efficiency is high, the duration is short are more and more subject to the extensive concern of industry.A complete battery energy storage station is generally made up of electric battery, power conversion system, the several part of AC distribution device.For the battery energy storage station of MW class, electric battery corresponding under a power converter is generally made up of tens battery strings, and battery strings exit DC current, magnitude of voltage are often higher.For lithium ion battery energy storage station; 500kW AC/DC power conversion system is formed by 14 battery series-parallel connections; electric battery direct current exit voltage is about 800V; each battery strings maximum current is about 60A; if directly access wave recording device; namely exceed the working range of conventional power system fault recorder analog input, the designing requirement of " loop of more than voltage 250V should not enter control and protection screen " in DL/T 5136 specification can not be met.On the other hand, in battery chamber, battery rack is numerous, if wave-record chart is accessed wave recording device from each battery strings respectively, records ripple loop on the spot and comparatively disperses, and is unfavorable for operations staff's unified operation management in units of power conversion system.
In prior art, there is no the failure wave-recording technical scheme for battery energy storage, the technology only having substation fault to record ripple has two kinds: (1) conventional substation failure wave-recording loop, conventional substation straight-flow system is generally DC110V/220V, 220kV and above transformer station, different section DC bus accesses different faults oscillograph respectively and carries out record ripple, DC bus voltage-to-ground analog quantity and wave recording device working power share one group of direct supply, both are separately powered by DC circuit breaker at failure wave-recording screen, as shown in Figure 1.Its shortcoming is: this technology generally uses in conventional substation, and, voltage few for monitoring point is less than the monitoring target of 250V, and failure wave-recording mode is simple and convenient.But, use if be grafted directly to battery energy storage station, cannot DC voltage 400V-1000V be met, the record ripple requirement of the monitoring target of electric current 0-200A.2, electronic type voltage, current transformer collection signal technology are adopted to UHV (ultra-high voltage), UHVDC converter station, be converted to light signal by remote end module and be connected to digital wave-recording device and carry out record ripple.As shown in Figure 2, the outlet of certain DC converter station 500kV pole, at transmission line circuit installing electronic mutual inductor, wherein, R1 is electronic current mutual inductor, R5 is electronic type voltage transformer, realizes the isolation that the DC voltage of hundred kilovolts, the DC current of hundreds of peace and double measurement record ripple loop, and realize failure wave-recording function by the light signal that merge cells provides by electronic mutual inductor.Its shortcoming is: electronic mutual inductor and support equipment thereof involve great expense, and a measurement point cost is about hundreds of thousands unit.The every 500kW power conversion system in lithium-ion energy storage power station for MW class is different according to topological structure, need 12-20 measurement point not, the measurement point of One's name is legion like this, this technology transplant is applied to battery energy storage station, it is less economical, equipment is various, is difficult to the requirement meeting this application occasion.
Summary of the invention
Object of the present invention, it is the demand that can not meet the failure wave-recording technology of battery energy storage in order to solve existing power failure record ripple, a kind of battery energy storage is provided to stand erectly streaming system failure wave-recording harvester, this failure wave-recording harvester can meet many measurement points, high voltage, big current major loop signal record ripple requirement, the concentrated collection realizing record ripple signal with on give.
Object of the present invention can reach by following technical solution:
Battery energy storage is stood erectly streaming system failure wave-recording harvester, it is characterized in that: comprise miniwatt AC/DC module, several current Hall elements LT, several voltage Hall elements LV, current Hall element LT is connected on battery energy storage and stands erectly stream major loop positive pole, voltage Hall element LV is connected in parallel on battery energy storage and is just standing erectly stream major loop, negative pole two end, each battery strings configures an a current Hall element LT and voltage Hall element LV, whole current Hall element LT and voltage Hall element LV concentrated setting are on one piece of failure wave-recording collection screen, the unification of all record ripple signals picks out from failure wave-recording collection screen, the electric current of different battery strings, current signal loop merges use polycore cable, described current Hall element LT is connected the voltage output end D1 of miniwatt AC/DC module with the power input of a voltage Hall element LV, current Hall element LT is connected record ripple signal and exports link with the signal output part of a voltage Hall element LV, form the record ripple signal output part D2 of external wave recording device.
Object of the present invention can also reach by following technical solution:
A kind of embodiment of the present invention is: miniwatt AC/DC module has AC 220V mains electricity input end and DC 15V DC voltage output end, AC 220V is converted to DC 15V weak electric signal, powers to current Hall element LT and voltage Hall element LV.
A kind of embodiment of the present invention is: the detection signal that current Hall element LT and voltage Hall element LV exports is the current signal of 4-20mA.
A kind of embodiment of the present invention is: system is provided with 20-50 current Hall element LT and 20-50 voltage Hall element LV, form the electric current to 20-50 battery strings and voltage detection circuit, export 96 road 4-20mA detection signals to external wave recording device, namely export electric current, the information of voltage of 20-50 battery strings.
A kind of embodiment of the present invention is: the cross section of described external wave recording device Access Control cable is 1.5mm
2.
The present invention has following outstanding technical characterstic and benefit:
1, the present invention adopts current Hall element LT and voltage Hall element LV respectively in multiple battery strings, whole current Hall element LT and voltage Hall element LV concentrated setting are on one piece of failure wave-recording collection screen, the unification of all record ripple signals picks out from failure wave-recording collection screen, the electric current of different battery strings, current signal loop merges use polycore cable, the current signal detected and voltage signal concentrated collection are sent to wave recording device, efficiently solve DC side high voltage, the record ripple problem in big current loop, have to optimize and realize record ripple loop structure, to the electric current of multiple battery strings, voltage detecting unified management and facilitate the beneficial effects such as operation and maintenance.
2, the present invention is arranged the conveying of both positive and negative polarity low-tension supply of failure wave-recording collection screen, current signal and voltage signal and exports and realized by a polycore cable, can save cable on the one hand, be convenient to operation maintenance on the other hand.
3, each battery strings of the present invention only needs configuration current Hall, a voltage Hall, cost is less than 200 yuan, the electronic mutual inductor adopted compared to existing technology significantly can save equipment cost, and meet the demand of energy-accumulating power station failure wave-recording, economy is outstanding uses Hall element, electric current, voltage is outputed signal as 4-20mA amount is convenient to gather, can realize effective isolation of straight-flow system major loop and secondary circuit simultaneously.
4, the present invention's battery energy storage of combining closely is stood erectly the feature of streaming system, customized, and loop design is simple, be easy to realize, and has good engineering practical value.
Accompanying drawing explanation
Fig. 1 is that prior art routine becomes streaming system failure wave-recording circuit technology schematic diagram of standing erectly.
Fig. 2 is prior art UHV (ultra-high voltage), UHVDC converter station failure wave-recording technical schematic diagram.
Fig. 3 battery energy storage of the present invention is stood erectly the structural representation of streaming system failure wave-recording harvester.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Specific embodiment 1:
With reference to Fig. 3, the battery energy storage of the present embodiment is stood erectly streaming system failure wave-recording harvester, comprise miniwatt AC/DC module, several current Hall elements LT, several voltage Hall elements LV, current Hall element LT is connected on battery energy storage and stands erectly stream major loop positive pole, voltage Hall element LV is connected in parallel on battery energy storage and is just standing erectly stream major loop, negative pole two end, each battery strings configures an a current Hall element LT and voltage Hall element LV, whole current Hall element LT and voltage Hall element LV concentrated setting are on one piece of failure wave-recording collection screen, the unification of all record ripple signals picks out from failure wave-recording collection screen, the electric current of different battery strings, current signal loop merges use polycore cable, described current Hall element LT is connected the voltage output end D1 of miniwatt AC/DC module with the power input of a voltage Hall element LV, current Hall element LT is connected record ripple signal and exports link with the signal output part of a voltage Hall element LV, form the record ripple signal output part D2. of external wave recording device
In concrete enforcement, described miniwatt AC/DC module has AC 220V mains electricity input end and DC 15V DC voltage output end, AC 220V is converted to DC 15V weak electric signal, powers to current Hall element LT and voltage Hall element LV.The detection signal that current Hall element LT and voltage Hall element LV exports is the current signal of 4-20mA.System is provided with 20-50 current Hall element LT and 20-50 voltage Hall element LV, form the electric current to 20-50 battery strings and voltage detection circuit, export 96 road 4-20mA detection signals to external wave recording device, namely export electric current, the information of voltage of 20-50 battery strings.The cross section of described external wave recording device 3 Access Control cable is 1.5mm
2, this control cables can adopt multi-core controlled cable to reduce costs to a certain extent.
The present invention is when failure wave-recording gathers, the current Hall element LT powered by arranging DC 15V light current in battery strings be connected on battery energy storage stand erectly stream major loop positive pole and voltage Hall element LV be connected in parallel on battery energy storage stand erectly stream major loop positive and negative electrode two end, by voltage Hall element LV, current Hall element LT is sent to wave recording device 3 to the stand erectly current signal of stream and voltage signal of battery energy storage, effectively realizes multiple spot and detects and reduce the cost of pick-up unit.
Claims (5)
1. battery energy storage is stood erectly streaming system failure wave-recording harvester, it is characterized in that: comprise miniwatt AC/DC module, several current Hall elements LT, several voltage Hall elements LV, current Hall element LT is connected on battery energy storage and stands erectly stream major loop positive pole, voltage Hall element LV is connected in parallel on battery energy storage and is just standing erectly stream major loop, negative pole two end, each battery strings configures an a current Hall element LT and voltage Hall element LV, whole current Hall element LT and voltage Hall element LV concentrated setting are on one piece of failure wave-recording collection screen, the unification of all record ripple signals picks out from failure wave-recording collection screen, the electric current of different battery strings, current signal loop merges use polycore cable, described current Hall element LT is connected the voltage output end D1 of miniwatt AC/DC module with the power input of a voltage Hall element LV, current Hall element LT is connected record ripple signal and exports link with the signal output part of a voltage Hall element LV, form the record ripple signal output part D2 of external wave recording device.
2. battery energy storage according to claim 1 is stood erectly streaming system failure wave-recording harvester, it is characterized in that: miniwatt AC/DC module has AC 220V mains electricity input end and DC 15V DC voltage output end, AC 220V is converted to DC 15V weak electric signal, powers to current Hall element LT and voltage Hall element LV.
3. battery energy storage according to claim 1 and 2 is stood erectly streaming system failure wave-recording harvester, it is characterized in that: the detection signal that current Hall element LT and voltage Hall element LV exports is the current signal of 4-20mA.
4. battery energy storage according to claim 3 is stood erectly streaming system failure wave-recording harvester, it is characterized in that: system is provided with 20-50 current Hall element LT and 20-50 voltage Hall element LV, form the electric current to 20-50 battery strings and voltage detection circuit, export 96 road 4-20mA detection signals to external wave recording device, namely export electric current, the information of voltage of 20-50 battery strings.
5. battery energy storage according to claim 3 is stood erectly streaming system failure wave-recording harvester, it is characterized in that: the cross section of described external wave recording device (3) Access Control cable is 1.5mm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410724750.3A CN104459555A (en) | 2014-03-24 | 2014-12-02 | Battery energy storage station DC system fault recording and collecting device |
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| CN2014101119802 | 2014-03-24 | ||
| CN201410111980 | 2014-03-24 | ||
| CN201410724750.3A CN104459555A (en) | 2014-03-24 | 2014-12-02 | Battery energy storage station DC system fault recording and collecting device |
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| CN104459555A true CN104459555A (en) | 2015-03-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109828177A (en) * | 2019-03-25 | 2019-05-31 | 广西电网有限责任公司钦州供电局 | A kind of fault recording system and method for direct current system |
| CN111896224A (en) * | 2020-08-14 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Laser power supply loop performance detection device and method and terminal equipment |
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Application publication date: 20150325 |