CN107123973A - A kind of transformer station's emergency protection method and device - Google Patents
A kind of transformer station's emergency protection method and device Download PDFInfo
- Publication number
- CN107123973A CN107123973A CN201710330293.3A CN201710330293A CN107123973A CN 107123973 A CN107123973 A CN 107123973A CN 201710330293 A CN201710330293 A CN 201710330293A CN 107123973 A CN107123973 A CN 107123973A
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- Prior art keywords
- protection
- emergency
- transformer station
- condition
- trip
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 230000006837 decompression Effects 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 7
- 230000009977 dual effect Effects 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- 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
Landscapes
- Protection Of Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of transformer station's emergency protection method; emergency protecting equipment and its trip(ping) circuit use dual power supply pattern; powered simultaneously by the original power of alterating and direct current of independent UPS accumulation power supplies and transformer station; to ensure after the original power of alterating and direct current thrashing of transformer station, emergency protecting equipment still can continue to protect the safe operation of transformer station.Emergency protection method includes：Protect input condition, protection act condition and trip protection method totally 3 parts, protection input condition are used for ensuring that emergency protection is put into only in the case of original electrical secondary system dead electricity；Protection act condition is used to judge whether occur in that the failure for needing to trip in primary system；Trip protection method is used to determine the tripping operation scope after protection act.This emergency protection method and device, in the case of solving the overall dead electricity of transformer station secondary system, the great risk brought because original protection device is out of service.
Description
Technical field
The present invention relates to a kind of transformer station's electrical protection method, especially a kind of emergency protection method and device, for solving
Certainly after transformer station's power of alterating and direct current system decompression, the safe operation hidden danger that original secondary protection system is exited and produced.
Background technology
Transformer station's electrical primary equipment refers to the high-voltage electrical apparatus for being directly used in the production process of production, conveying and distribution electric energy
Equipment, it includes generator, transformer, breaker, disconnecting switch, automatic switch, contactor, knife-like switch, bus, power transmission line
Road, power cable, reactor, motor etc..
Transformer station's electrical secondary equipment refer to the work to primary system be monitored, control, adjusting, protect needed for it is low
Voltage electrical equipment, such as relay protection, safety automation control, system communication, dispatch automated system.It is mutual by secondary device
Connection, constitutes the electric loop for being monitored, control, adjusting and protecting to primary equipment and is referred to as secondary circuit or secondary connection system
System.Secondary device and secondary circuit together constitute secondary electrical system.
Alterating and direct current is provided with the reliable working power of need of work of secondary electrical system, therefore modern transformer station
Source system is that transformer station's secondary electrical system is powered.Once power of alterating and direct current system decompression, it will cause electrical secondary system to fail.This
When, if short trouble occurs in primary equipment, failure will not be protected by electrical secondary system and cut off, so as to cause transformer etc. one
Secondary device it is badly damaged, had a strong impact on while being also brought along to the stable operation of power system.
Because major accident happens occasionally caused by power of alterating and direct current system dead electricity.For example：Morning on June 18th, 2016,
Shaanxi Xi'an 330kV southern suburbs, which becomes, occurs main transformer burning damage accident.After State Grid Corporation of China's accident investigation and analysis (referring to《West
Pacify 330KV transformer burnout failure survey reports》), it is the reason for this accident：" this causes of incident is III in 35 kilovolts of Weis
Cable mid head explodes, while there is fuel gas in conduit line, occurs to dodge quick-fried.Accident main cause is 330 kilovolts of southern suburbs
Become #1, #2, #0 station to become because of the whole dead electricity of low pressure trip, battery is not connected in dc bus, whole station protection and control normally
Loop loses dc source, causes failure to bypass the immediate leadership ".As can be seen here, electrical secondary system dead electricity is to cause the main cause of accident in standing.
In the prior art, for example：《The research of microcomputer type emergency treatment device after the disappearance of transforming plant DC power supply》, Xue
Refined, 2006, North China Electric Power University described a kind of microcomputer type emergency treatment device, and it uses capacitor energy storage for power supply, at station
Current protecting function is put into after interior DC supply interruption.The weak point of this method is：1) electricity of capacitor energy storage for power supply mode
Pressure is reduced with powers duration, it is impossible to ensure power supply quality for a long time；2) do not account for the wrong report of DC supply interruption signal and lead
The emergency protection of cause miscarry into；3) non-ionizing energy loss function is not accounted for；4) the tripping operation scope without explanation emergency treatment device.
The content of the invention
The present invention proposes a kind of novel transformer substation emergency protection method and device.Emergency protecting equipment, mainly by microcomputer
Processor, sampling circuit and trip(ping) circuit composition；Emergency protecting equipment and its trip(ping) circuit use dual power mode, by independence
The original power of alterating and direct current of UPS accumulation power supplies and transformer station is powered simultaneously.
Transformer station's emergency protection method is realized in emergency protecting equipment, including 3 parts：Protect input condition, protection
Operation condition and trip protection method.Emergency protection method realizes that logic is as shown in Figure 1.
Emergency protection is put into when meeting three below condition at the same time, and otherwise emergency protection is exited：
Input condition 1：The original power of alterating and direct current decompression of transformer station；
Input condition 2：Original protection equipment that at least 2 are installed on different disk cabinets in transformer station locking simultaneously；
Input condition 3：The control word of emergency protection, soft pressing plate and hard pressing plate are put into simultaneously.
Emergency protection is after input condition is met, if meeting any one in following protection act condition, meets an urgent need and protects
Shield tripping operation：
Operation condition 1：The virtual value of the electrical quantity such as electric current and voltage and duration meet protection act condition；
Operation condition 2：Receive the actuating signal of non electrical quantity tripping relay；
After emergency protection tripping operation, all power inlet wire of transformer station should be cut off.
The present invention is in use, as a result of UPS energy storage for power supply, it is ensured that emergency protecting equipment is in a long time
Continuous work；Powered simultaneously as a result of dual power supply, it is ensured that met an urgent need after the original power of alterating and direct current system decompression of transformer station
Protection device is quickly put into；Due on the basis of ac and dc systemses decompression signal, adding original protection blocking signal conduct
Emergency protection puts into condition, can avoid caused by power monitoring relay damaged emergency protection miscarry into；Should due to adding
Anxious non-ionizing energy loss function, can improve the failure removal speed and reliability during primary equipment body failure；Due to specify that
Excision transformer station all power, can effectively simplify the function of emergency protection after emergency protection action, reduce answering for emergency protection
Miscellaneous degree and enforcement difficulty.
Brief description of the drawings
Fig. 1 emergency protection method logic charts；
Fig. 2 dc source type emergency protecting equipment exemplary block diagrams；
Embodiment
Emergency protecting equipment and its trip(ping) circuit use dual power supply pattern, original by independent accumulation power supply and transformer station
Power of alterating and direct current is powered simultaneously, to ensure, in the original power of alterating and direct current system decompression of transformer station, to cause secondary protection system to have a power failure
After stoppage in transit, emergency protecting equipment still can continue to protect the safe operation of transformer station.Fig. 2, which is that a kind of dc source type is emergent, to be protected
The exemplary block diagram of protection unit.Its independent accumulation power supply is by uninterruptible power system (Uninterruptible Power
System/Uninterruptible Power Supply, UPS) and rectifier composition.When interior original dc source of standing is normal,
Emergency protecting equipment and its trip(ping) circuit dc source in station are powered；In standing after original dc source decompression, emergency protection dress
Put and its trip(ping) circuit is continued to power by independent accumulation power supply.
Emergency protecting equipment must be exited when electrical secondary system is normally run in station, otherwise may as emergent means
Work to existing electrical secondary system brings interference.Therefore emergency protecting equipment has to gather power monitoring relay decompression contact
With original protection device locking contact, as the input condition of emergency protection function, as shown in Figure 2.For increase decision logic
Reliability, emergency protecting equipment should at least gather the locking contact of 2 original protection devices.
Occur in transformer station after electrical secondary system power supply deperssurization emergency, emergency protecting equipment input, but do not trip out directly
Mouthful, but the running status of primary system is monitored according to relay protective scheme.Therefore, emergency protecting equipment needs collection primary system electricity
The electrical quantity such as stream and voltage, and whether protection act condition is met by the size and duration for judging its virtual value, come true
Determine whether primary equipment there occurs failure.If emergency protecting equipment receives the action connection point signal of non electrical quantity relay, can
Directly to judge to there occurs failure in primary equipment.
After emergency protection action, the tripping operation exit relay closure of emergency protecting equipment, and should by the secondary circuit that trips
Cut off all power inlet wire of transformer station.
The technological thought of above case study on implementation only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is all
It is any change done on the basis of technical scheme according to technological thought proposed by the present invention, each falls within present invention protection model
Within enclosing.
Claims (4)
1. a kind of transformer station's emergency protection method, it is characterised in that：The corresponding system architecture of method includes computer processor, sampling
Loop, trip(ping) circuit and emergency protecting equipment, the emergency protecting equipment hand over straight by independent UPS accumulation power supplies and transformer station are original
Stream power supply is powered simultaneously；
The emergency protection method realized by emergency protecting equipment, including：
Whether trigger protection is acted setting protection input condition criterion；
Whether setting protection act condition criterion triggers emergency protection tripping operation；
Setting trip protection method realizes emergency protection.
2. a kind of transformer station's emergency protection method as claimed in claim 1, it is characterised in that the protection puts into condition and is：
When emergency protection meets three below condition at the same time trigger protection act, it is other in the case of emergency protection exit：
Condition 201：The original power of alterating and direct current decompression of transformer station；
Condition 202：Original protection equipment that at least 2 are installed on different disk cabinets in transformer station locking simultaneously；
Condition 203：The control word of emergency protection, soft pressing plate and hard pressing plate are put into simultaneously.
3. a kind of transformer station's emergency protection method as claimed in claim 1, it is characterised in that the protection act condition is：
After the action of emergency protection trigger protection, if meeting any one in following protection act condition, triggering emergency protection tripping operation：
Condition 301：The virtual value of electrical quantity and duration meet predetermined threshold value；
Condition 302：Receive the actuating signal of non electrical quantity tripping relay.
4. a kind of transformer station's emergency protection method as claimed in claim 1, it is characterised in that the trip protection method is：
Trip and export after emergency protection action, cut off all power inlet wire of transformer station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330293.3A CN107123973B (en) | 2017-05-11 | 2017-05-11 | A kind of substation's emergency protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330293.3A CN107123973B (en) | 2017-05-11 | 2017-05-11 | A kind of substation's emergency protection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107123973A true CN107123973A (en) | 2017-09-01 |
| CN107123973B CN107123973B (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710330293.3A Expired - Fee Related CN107123973B (en) | 2017-05-11 | 2017-05-11 | A kind of substation's emergency protection method and device |
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| CN (1) | CN107123973B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736454A (en) * | 2017-05-31 | 2018-11-02 | 国家电网公司 | A kind of rural power grids substation emergency protection control method |
| CN109996380A (en) * | 2019-03-04 | 2019-07-09 | 中广核研究院有限公司 | A kind of master control room of nuclear power station lighting system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078946A (en) * | 2013-10-30 | 2014-10-01 | 中国南方电网有限责任公司 | Wide-area distance protecting method for transformer substations |
| EP2706637B1 (en) * | 2012-09-06 | 2015-10-21 | Kabushiki Kaisha Toshiba | Current differential relay and current differential relay system using current differential relay thereof |
| CN105048420A (en) * | 2015-08-28 | 2015-11-11 | 南京南瑞继保电气有限公司 | Secondary direct current power failure protection method for substation |
| CN106451749A (en) * | 2016-11-21 | 2017-02-22 | 铁道第三勘察设计院集团有限公司 | Emergency protection device and method under malfunctioning condition of traction substation control protection system |
| WO2017051372A1 (en) * | 2015-09-23 | 2017-03-30 | A.S.EN. ANSALDO SVILUPPO ENERGIA S.r.l. | Medium voltage power supply |
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2017
- 2017-05-11 CN CN201710330293.3A patent/CN107123973B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2706637B1 (en) * | 2012-09-06 | 2015-10-21 | Kabushiki Kaisha Toshiba | Current differential relay and current differential relay system using current differential relay thereof |
| CN104078946A (en) * | 2013-10-30 | 2014-10-01 | 中国南方电网有限责任公司 | Wide-area distance protecting method for transformer substations |
| CN105048420A (en) * | 2015-08-28 | 2015-11-11 | 南京南瑞继保电气有限公司 | Secondary direct current power failure protection method for substation |
| WO2017051372A1 (en) * | 2015-09-23 | 2017-03-30 | A.S.EN. ANSALDO SVILUPPO ENERGIA S.r.l. | Medium voltage power supply |
| CN106451749A (en) * | 2016-11-21 | 2017-02-22 | 铁道第三勘察设计院集团有限公司 | Emergency protection device and method under malfunctioning condition of traction substation control protection system |
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| Title |
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| 薛斌: "变电站直流电源消失后的微机型应急处理装置的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736454A (en) * | 2017-05-31 | 2018-11-02 | 国家电网公司 | A kind of rural power grids substation emergency protection control method |
| CN109996380A (en) * | 2019-03-04 | 2019-07-09 | 中广核研究院有限公司 | A kind of master control room of nuclear power station lighting system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107123973B (en) | 2018-11-23 |
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