CN107123973B - A kind of substation's emergency protection method and device - Google Patents
A kind of substation's emergency protection method and device Download PDFInfo
- Publication number
- CN107123973B CN107123973B CN201710330293.3A CN201710330293A CN107123973B CN 107123973 B CN107123973 B CN 107123973B CN 201710330293 A CN201710330293 A CN 201710330293A CN 107123973 B CN107123973 B CN 107123973B
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- Prior art keywords
- protection
- emergency
- substation
- 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
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 5
- 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
- 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
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000011835 investigation Methods 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
- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention discloses a kind of substation's emergency protection methods; emergency protecting equipment and its trip(ping) circuit use dual power supply mode; it is powered simultaneously by the original power of alterating and direct current of independent UPS accumulation power supply and substation; to ensure after the original power of alterating and direct current thrashing of substation, emergency protecting equipment still can continue to protect the safe operation of substation.Emergency protection method includes：Investment condition is protected, totally 3 parts, protection investment condition are used to ensure that emergency protection is only put into original electrical secondary system power loss for protection act condition and trip protection method；Protection act condition is used for the failure for judging whether to occur in primary system to need to trip；Trip protection method is for determining the tripping range after protection act.This emergency protection method and device, in the case of solving transformer station secondary system entirety power loss, bring great risk due to original protective device is out of service.
Description
Technical field
The present invention relates to a kind of substation's electrical protection method, especially a kind of emergency protection method and device, for solving
Certainly after substation's power of alterating and direct current system decompression, original secondary protection system exits and the safe operation hidden danger that generates.
Background technique
Substation'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..
Substation's electrical secondary equipment refers to low needed for being monitored, control to the work of primary system, adjusting, protecting
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 known as secondary circuit or secondary connection system
System.Secondary device and secondary circuit together constitute secondary electrical system.
The reliable working power of the need of work of secondary electrical system, therefore alterating and direct current is provided in modern substation
Source system is the power supply of substation's secondary electrical system.Once power of alterating and direct current system decompression, it will electrical secondary system is caused to fail.This
When, if short trouble occurs in primary equipment, failure will not be protected by electrical secondary system and be cut off, so as to cause transformer etc. one
Secondary device it is badly damaged, while the stable operation of electric system is also brought along and is seriously affected.
The major accident as caused by power of alterating and direct current system power loss happens occasionally.Such as：Morning on June 18th, 2016,
The Shaanxi Xi'an southern suburbs 330kV, 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 report》), the reason of this accident is：" this causes of incident is III in 35 kilovolts of Weis
Cable mid head explosion, while there are fuel gas in conduit line, occur to dodge quick-fried.Accident main cause is 330 kilovolts of southern suburbs
Become the station #1, #2, #0 with becoming because of low pressure trip whole power loss, battery is not connected in DC bus, whole station protection and control normally
Circuit loses DC power supply, and failure is caused to bypass the immediate leadership ".It can be seen that electrical secondary system power loss is the main reason for leading to accident in standing.
In the prior art, such as：《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, uses capacitor energy storage for power supply, standing
Current protecting function is put into after interior DC supply interruption.The shortcoming of this method is：1) electricity of capacitor energy storage for power supply mode
Pressure is reduced with powers duration, can not guarantee power supply quality for a long time；2) it does not account for the wrong report of DC supply interruption signal and leads
The emergency protection of cause miscarry into；3) non-ionizing energy loss function is not accounted for；4) the tripping range of emergency treatment device is not illustrated.
Summary of the invention
The invention proposes a kind of novel transformer substation emergency protection method and devices.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 supply and substation is powered simultaneously.
Substation's emergency protection method is realized in emergency protecting equipment, including 3 parts：Protect investment condition, protection
Operation condition and trip protection method.The realization logic of emergency protection method is as shown in Figure 1.
Emergency protection is put into when meeting following three conditions at the same time, and otherwise emergency protection exits：
Investment condition 1：The original power of alterating and direct current decompression of substation；
Investment condition 2：At least 2 are installed on original protection equipment of different disk cabinets while being latched in substation；
Investment condition 3：Control word, soft pressing plate and the hard pressing plate of emergency protection are put into simultaneously.
Emergency protection is after meeting investment condition, if meeting any one in following protection act condition, emergency is protected
Shield tripping：
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 action signal of non electrical quantity tripping relay；
After emergency protection tripping, all power inlet wire of substation should be cut off.
The present invention is in use, due to using UPS energy storage for power supply, it is ensured that emergency protecting equipment is in a long time
Continuous work；It powers simultaneously due to using dual power supply, it is ensured that meet an urgent need after the original power of alterating and direct current system decompression of substation
Protective device is quickly put into；Due to increasing original protection blocking signal conduct on the basis of ac and dc systems decompression signal
Emergency protection put into condition, can be miscarried to avoid emergency protection caused by power monitoring relay damaged into；It is answered due to increasing
Failure removal speed and reliability when primary equipment ontology failure can be improved in anxious non-ionizing energy loss function；Due to specifying
Substation's all power is cut off after emergency protection movement, can effectively simplify the function of emergency protection, reduce answering for emergency protection
Miscellaneous degree and enforcement difficulty.
Detailed description of the invention
Fig. 1 emergency protection method logic chart；
Fig. 2 DC power supply type emergency protecting equipment typical structure diagram；
Specific embodiment
Emergency protecting equipment and its trip(ping) circuit use dual power supply mode, original by independent accumulation power supply and substation
Power of alterating and direct current is powered simultaneously, to ensure to cause secondary protection system to have a power failure in the original power of alterating and direct current system decompression of substation
After stoppage in transit, emergency protecting equipment still can continue to protect the safe operation of substation.Fig. 2 is that a kind of DC power supply type emergency is protected
The typical structure 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 power supply of standing is normal,
Emergency protecting equipment and its trip(ping) circuit are powered by DC power supply in standing；In standing after original DC power supply decompression, emergency protection dress
It sets and its trip(ping) circuit is continued to power by independent accumulation power supply.
Emergency protecting equipment must exit when electrical secondary system operates normally in standing, otherwise may as emergency means
The work belt of existing electrical secondary system is interfered.Therefore emergency protecting equipment has to acquisition power monitoring relay decompression contact
It is latched contact with original protective device, as the investment condition of emergency protection function, as shown in Figure 2.To increase decision logic
Reliability, emergency protecting equipment should at least acquire the locking contact of 2 original protective devices.
After electrical secondary system power supply deperssurization emergency occurs in substation, emergency protecting equipment investment, but do not trip out directly
Mouthful, but the operating status of primary system is monitored according to relay protective scheme.Therefore, emergency protecting equipment needs to acquire primary system electricity
The electrical quantity such as stream and voltage, and by judging whether the size of its virtual value and duration meet protection act condition, come true
Determine whether primary equipment has occurred failure.If emergency protecting equipment receives the action connection point signal of non electrical quantity relay, can
Directly to determine that failure has occurred in primary equipment.
After emergency protection movement, the tripping exit relay of emergency protecting equipment is closed, and is answered by the secondary circuit that trips
Cut off all power inlet wire of substation.
The above case study on implementation is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all
It is any changes made on the basis of the technical scheme according to the technical idea provided by the invention, each falls within present invention protection model
Within enclosing.
Claims (3)
1. a kind of substation's emergency protection method, it is characterised in that：The corresponding system architecture of method includes computer processor, sampling
Circuit, trip(ping) circuit and emergency protecting equipment, the emergency protecting equipment are handed over directly by independent UPS accumulation power supply and substation are original
Galvanic electricity source powers simultaneously；
The emergency protection method realized by emergency protecting equipment, including：
Whether trigger protection acts setting protection investment condition criterion；
Whether setting protection act condition criterion triggers emergency protection tripping；
It sets trip protection method and realizes emergency protection；
The protection investment condition is：Trigger protection acts when emergency protection meets following three conditions at the same time, other situations
Lower emergency protection exits：
Condition 201：The original power of alterating and direct current decompression of substation；
Condition 202：At least 2 are installed on original protection equipment of different disk cabinets while being latched in substation；
Condition 203：Control word, soft pressing plate and the hard pressing plate of emergency protection are put into simultaneously.
2. a kind of substation's emergency protection method as described in claim 1, which is characterized in that the protection act condition is：
After the movement of emergency protection trigger protection, if meeting any one in following protection act condition, triggering emergency protection tripping：
Condition 301：The virtual value of electrical quantity and duration meet scheduled threshold value；
Condition 302：Receive the action signal of non electrical quantity tripping relay.
3. a kind of substation's emergency protection method as described in claim 1, which is characterized in that the trip protection method is：
It trips and exports after emergency protection movement, cut off all power inlet wire of substation.
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 CN107123973A (en) | 2017-09-01 |
| CN107123973B true CN107123973B (en) | 2018-11-23 |
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| 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109996380B (en) * | 2019-03-04 | 2021-09-24 | 中广核研究院有限公司 | Nuclear power station master control room 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 |
-
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 |
Non-Patent Citations (1)
| Title |
|---|
| 变电站直流电源消失后的微机型应急处理装置的研究;薛斌;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20070515;第C042-328页 * |
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| CN107123973A (en) | 2017-09-01 |
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Granted publication date: 20181123 |