CN104539037A - System and method for replacing 10kV transformer by SSTS system in live working - Google Patents
System and method for replacing 10kV transformer by SSTS system in live working Download PDFInfo
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- CN104539037A CN104539037A CN201510027235.4A CN201510027235A CN104539037A CN 104539037 A CN104539037 A CN 104539037A CN 201510027235 A CN201510027235 A CN 201510027235A CN 104539037 A CN104539037 A CN 104539037A
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Abstract
The invention relates to a system and a method for replacing a 10kV transformer by an SSTS system in live working. The system is characterized in that a bypass circuit is externally connected onto a main line (3) between a to-be-repaired 10kV transformer (1) and a user (2). The bypass circuit is characterized in that a first mechanical switch (K1) and a first 10kV SSTS solid selector switch (TS1) which are sequentially connected in series are connected with a second mechanical switch (K2) in parallel, and the whole which is connected with a second 10kV SSTS solid selector switch (TS2) is connected to a low voltage side of a standby 10kV transformer (4), wherein a first load switch (1DL) is connected onto the first 10kV SSTS solid selector switch (TS1) in parallel and a second load switch (2DL) is connected to the second 10kV SSTS solid selector switch (TS2) in parallel. The system and method provided by the invention fully integrate the advantages of an SSTS technology and the mechanical switches, so that the power supply reliability can be comprehensively enhanced.
Description
Technical field
The invention belongs to bypass live line working technical field, switch specifically for " seamless " realized during distribution line hotline maintenance between main power source and stand-by power source.
Background technology
Along with national economy social development and living standards of the people improve day by day, require more and more higher to power supply reliability and the quality of power supply, especially along with the development of modern science and technology, various complexity, precision, constantly increase the power consumption equipment of quality of power supply sensitivity, the past is to reduce power failure range or traditional hotline maintenance of having a power failure in short-term can not meet the requirement of client to power supply quality completely.At present, the great majority adopted in electric power system are mechanical switch switch, and this electric mechanical switch characteristic inherently makes switch speed and transient characterisitics not be very good, can not accomplish the switching of " seamless ".And be that the ON time of the semiconductor device of representative can reach Microsecond grade with thyristor, and do not produce electric arc in switching process.Therefore utilize the electronic power switch of based semiconductor device to substitute or transform traditional mechanical switch switch, will effectively solve the intrinsic problem of conventional mechanical switch.But in conventional SSTS scheme, thyristor conducting always in the running of solid converting switch (forward and each conducting of reverse thyristor half cycle), although the pressure drop of thyristor two ends is very little, but what flow through is larger load current, very large heat and loss can be produced, certain cooling provision must be taked.Common cooling means comprises water-cooled, oil cooling, air-cooled etc.Cooling device certainly will increase the complexity of system and the expense of operation maintenance, reduces efficiency and the reliability of device.Comparatively speaking, the advantage of mechanical switch is that operational efficiency can reach 99% or more, and the research and development based on the high-low pressure load transfer system of SSTS technology can further improve power supply reliability.
Summary of the invention
The object of this invention is to provide a kind of advantage that fully can merge SSTS technology and mechanical switch, charged employing SSTS system substitutes the system and method for 10kV transformer, with General Promotion power supply reliability.
Object of the present invention is achieved through the following technical solutions:
Charged employing SSTS system substitutes the system of 10kV transformer, this system is external bypass circuit on the main line between Awaiting Overhaul 10kV transformer and user, this bypass circuit comprises: in parallel with the second mechanical switch after sequential series first mechanical switch and a 10kV SSTS solid converting switch, entirety is connected to 10kV step down side for subsequent use after connecting with the 2nd 10kV SSTS solid converting switch again; Wherein, a 10kV SSTS solid converting switch is parallel with the first on-load switch, the 2nd 10kV SSTS solid converting switch is parallel with the second on-load switch.
The method that charged employing SSTS system substitutes 10kV transformer is as follows:
Before preparing maintenance, turn the load of Awaiting Overhaul 10kV transformer backend user by 10kV transformer-supplied for subsequent use, method step is as follows:
1) adopt the mode of live line working by the first on-load switch, the second on-load switch, a 10kV SSTS solid converting switch, the 2nd 10kV SSTS solid converting switch, the first mechanical switch, whole bypass circuit connects by the second mechanical switch, by the first on-load switch, the second on-load switch, the first mechanical switch, the second mechanical switch is placed in open position;
2) close the first mechanical switch, the second mechanical switch, and now trigger a 10kV SSTS solid converting switch conducting, namely electric current is transferred on thyristor;
3) close the first on-load switch, and a 10kV SSTS solid converting switch is out of service, and electric current is transferred on the first on-load switch immediately;
4) mode of live line working is adopted to disconnect the cut-off point of Awaiting Overhaul 10kV step down side on main line;
5) a 10kV SSTS solid converting switch puts into operation, and now trigger a 10kV SSTS solid converting switch conducting, electric current is transferred on thyristor immediately; Operate disconnection the one 10kV SSTS solid converting switch, the first mechanical switch successively, one 10kV SSTS solid converting switch thyristor will turn off when this after-current first time zero passage, trigger the 2nd 10kV SSTS solid converting switch turn on thyristors of opposite side subsequently, electric current is transferred on TS2 thyristor immediately, makes cut-off point backend user turn by 10kV transformer-supplied for subsequent use;
6) operate second on-load switch that closes, the 2nd 10kV SSTS solid converting switch is out of service, and namely electric current is transferred on the second on-load switch, completes load transfer;
7) check guarantee the first on-load switch, the first mechanical switch indeed disconnects, make band overhaul 10kV transformer lines cut-off point front end and possess maintenance condition;
After maintenance, main line cut-off point backend user load restoration is by 10kV transformer-supplied for subsequent use, and method step is as follows:
1-the 2nd 10kV SSTS solid converting switch puts into operation, and now trigger the 2nd 10kV SSTS solid converting switch conducting, electric current operates disconnection second on-load switch after transferring to thyristor immediately;
2-operates first mechanical switch that closes, 2nd 10kV SSTS solid converting switch is out of service, 2nd 10kV SSTS solid converting switch thyristor will turn off when this after-current first time zero passage, trigger a 10kV SSTS solid converting switch turn on thyristors of opposite side subsequently, namely electric current is transferred on a 10kV SSTS solid converting switch thyristor;
3-operates first on-load switch that closes, and a 10kV SSTS solid converting switch is out of service, and namely electric current is transferred on the first on-load switch;
4-adopts the mode of live line working to recover main line cut-off point and connects;
5-operates disconnection first on-load switch, the second on-load switch, a 10kV SSTS solid converting switch, the 2nd 10kV SSTS solid converting switch, the first mechanical switch, and the second mechanical switch, recovering by the 10kV transformer overhauled is user's normal power supply.
The present invention has set up the primary formula SSTS system of the 10kV being controlled respectively to be turned on or off by mechanical switch and killer switch, standby mode SSTS system.When 10kV transformer needs maintenance, by adopting the primary formula of 10kV, the standby mode SSTS system of combination switch to switch, realize the power supply of 10kV user temporarily by 10KV transformer-supplied for subsequent use.The present invention adds bypass mechanical switch when designing high-low pressure load transfer system, not only reduces operation expense but also can ensure power supply reliability and the quality of power supply.
Accompanying drawing explanation
Fig. 1 is system circuit diagram of the present invention.
Embodiment
Content of the present invention is set forth further below in conjunction with Figure of description.
As shown in Figure 1, charged employing SSTS system of the present invention substitutes the system of 10kV transformer, is external bypass circuit on the main line 3 between Awaiting Overhaul 10kV transformer 1 and user 2.This bypass circuit comprises: in parallel with the second mechanical switch K2 after a sequential series first mechanical switch K1 and 10kV SSTS solid converting switch TS1, entirety connects and 10kV transformer 4 low-pressure side for subsequent use after connecting with the 2nd 10kV SSTS solid converting switch TS2 again.Wherein, a 10kV SSTS solid converting switch TS1 is parallel with the first on-load switch 1DL, the 2nd 10kV SSTS solid converting switch TS2 is parallel with the second on-load switch 2DL.
The method that the present invention's charged employing SSTS system substitutes 10kV transformer is as follows:
Before preparing maintenance, turned by the load of Awaiting Overhaul 10kV transformer 1 backend user 2 and powered by 10kV transformer 4 for subsequent use, method step is as follows:
1) adopt the mode of live line working by the first on-load switch 1DL, the second on-load switch 2DL, a 10kV SSTS solid converting switch TS1, the 2nd 10kV SSTS solid converting switch TS2, the first mechanical switch K1, whole bypass circuit connects by the second mechanical switch K2, by the first on-load switch 1DL, the second on-load switch 2DL, the first mechanical switch K1, the second mechanical switch K2 is placed in open position;
2) close the first mechanical switch K1, the second mechanical switch K2, and now trigger a 10kV SSTS solid converting switch TS1 conducting, namely electric current is transferred on thyristor;
3) close the first on-load switch 1DL, and a 10kV SSTS solid converting switch TS1 is out of service, and electric current is transferred on the first on-load switch 1DL immediately;
4) mode of live line working is adopted to disconnect the cut-off point 5 of Awaiting Overhaul 10kV step down side on main line 3;
5) a 10kV SSTS solid converting switch TS1 puts into operation, and now trigger a 10kV SSTS solid converting switch TS1 conducting, electric current is transferred on thyristor immediately; Operate disconnection first on-load switch 1DL, the first mechanical switch K1 successively, one 10kV SSTS solid converting switch TS1 thyristor will turn off when this after-current first time zero passage, trigger the 2nd 10kV SSTS solid converting switch TS2 turn on thyristors of opposite side subsequently, electric current is transferred on TS2 thyristor immediately, and cut-off point backend user 2 turns is powered by 10kV transformer 4 for subsequent use;
6) operate the second on-load switch 2DL that closes, the 2nd 10kV SSTS solid converting switch TS2 is out of service, and namely electric current is transferred on the second on-load switch 2DL, completes load transfer;
7) check guarantee the first on-load switch 1DL, the first mechanical switch K1 indeed disconnects, make band overhaul 10kV transformer lines 1 cut-off point 5 front end and possess maintenance condition;
After maintenance, main line 3 cut-off point backend user 2 load restoration is powered by 10kV transformer 4 for subsequent use, and method step is as follows:
1-the 2nd 10kV SSTS solid converting switch TS2 puts into operation, and now trigger the 2nd 10kV SSTS solid converting switch TS2 conducting, electric current operates disconnection second on-load switch 2DL after transferring to thyristor immediately;
2-operates the first mechanical switch K1 that closes, 2nd 10kV SSTS solid converting switch TS2 is out of service, 2nd 10kV SSTS solid converting switch TS2 thyristor will turn off when this after-current first time zero passage, trigger a 10kV SSTS solid converting switch TS1 turn on thyristors of opposite side subsequently, namely electric current is transferred on a 10kV SSTS solid converting switch thyristor;
3-operates the first on-load switch 1DL that closes, and a 10kV SSTS solid converting switch TS1 is out of service, and namely electric current is transferred on the first on-load switch 1DL;
4-adopts the mode of live line working to recover main line 3 cut-off point 5 and connects;
5-operates disconnection first on-load switch 1DL, the second on-load switch 2DL, a 10kV SSTS solid converting switch TS1, the 2nd 10kV SSTS solid converting switch TS2, the first mechanical switch K1, second mechanical switch K2, recovering by the 10kV transformer overhauled is user's normal power supply.
So far, turning of 10kV transformer for subsequent use completes for work.
Claims (2)
1. charged employing SSTS system substitutes the system of 10kV transformer, it is characterized in that, this system is the upper external bypass circuit of main line (3) between Awaiting Overhaul 10kV transformer (1) and user (2), this bypass circuit comprises: sequential series first mechanical switch (K1) and a 10kV SSTS solid converting switch (TS1) in parallel with the second mechanical switch (K2) afterwards, entirety is connected to 10kV transformer (4) low-pressure side for subsequent use after connecting with the 2nd 10kV SSTS solid converting switch (TS2) again; Wherein, a 10kV SSTS solid converting switch (TS1) is parallel with the first on-load switch (1DL), the 2nd 10kV SSTS solid converting switch (TS2) is parallel with the second on-load switch (2DL).
2. utilize the charged employing of system described in claim 1 SSTS system to substitute the method for 10kV transformer, it is characterized in that, method is as follows:
Before preparing maintenance, turned by the load of Awaiting Overhaul 10kV transformer (1) backend user (2) and powered by 10kV transformer (4) for subsequent use, method step is as follows:
1) adopt the mode of live line working by the first on-load switch (1DL), the second on-load switch (2DL), a 10kV SSTS solid converting switch (TS1), the 2nd 10kV SSTS solid converting switch (TS2), the first mechanical switch (K1), whole bypass circuit connects by the second mechanical switch (K2), by the first on-load switch (1DL), the second on-load switch (2DL), the first mechanical switch (K1), the second mechanical switch (K2) is placed in open position;
2) close the first mechanical switch (K1), the second mechanical switch (K2), and now trigger 10kV SSTS solid converting switch (TS1) conducting, namely electric current is transferred on thyristor;
3) close the first on-load switch (1DL), and a 10kV SSTS solid converting switch (TS1) is out of service, and electric current is transferred on the first on-load switch (1DL) immediately;
4) mode of live line working is adopted to disconnect the cut-off point (5) of the upper Awaiting Overhaul 10kV step down side of main line (3);
5) a 10kV SSTS solid converting switch (TS1) puts into operation, and now trigger 10kV SSTS solid converting switch (TS1) conducting, electric current is transferred on thyristor immediately; Operate disconnection first on-load switch (1DL), the first mechanical switch (K1) successively, one 10kV SSTS solid converting switch (TS1) thyristor will turn off when this after-current first time zero passage, trigger the 2nd 10kV SSTS solid converting switch (TS2) turn on thyristors of opposite side subsequently, electric current is transferred on TS2 thyristor immediately, cut-off point backend user (2) is turned and is powered by 10kV transformer (4) for subsequent use;
6) operate the second on-load switch (2DL) that closes, the 2nd 10kV SSTS solid converting switch (TS2) is out of service, and namely electric current is transferred on the second on-load switch (2DL), completes load transfer;
7) check guarantee the first on-load switch (1DL), the first mechanical switch (K1) indeed disconnects, make band overhaul 10kV transformer lines (1) cut-off point (5) front end and possess maintenance condition;
After maintenance, main line (3) cut-off point backend user (2) load restoration is powered by 10kV transformer (4) for subsequent use, and method step is as follows:
1-the 2nd 10kV SSTS solid converting switch (TS2) puts into operation, and now trigger the 2nd 10kV SSTS solid converting switch (TS2) conducting, electric current operates disconnection second on-load switch (2DL) after transferring to thyristor immediately;
2-operates the first mechanical switch (K1) that closes, 2nd 10kV SSTS solid converting switch (TS2) is out of service, 2nd 10kV SSTS solid converting switch (TS2) thyristor will turn off when this after-current first time zero passage, trigger 10kV SSTS solid converting switch (TS1) turn on thyristors of opposite side subsequently, namely electric current is transferred on a 10kV SSTS solid converting switch thyristor;
3-operates the first on-load switch (1DL) that closes, and a 10kV SSTS solid converting switch (TS1) is out of service, and namely electric current is transferred on the first on-load switch (1DL);
4-adopts the mode of live line working to recover main line (3) cut-off point (5) and connects;
5-operates disconnection first on-load switch (1DL), the second on-load switch (2DL), a 10kV SSTS solid converting switch (TS1), the 2nd 10kV SSTS solid converting switch (TS2), the first mechanical switch (K1), second mechanical switch (K2), recovering by the 10kV transformer overhauled is user's normal power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027235.4A CN104539037B (en) | 2015-01-20 | 2015-01-20 | The charged method adopting SSTS system to substitute 10kV transformator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027235.4A CN104539037B (en) | 2015-01-20 | 2015-01-20 | The charged method adopting SSTS system to substitute 10kV transformator |
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| Publication Number | Publication Date |
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| CN104539037A true CN104539037A (en) | 2015-04-22 |
| CN104539037B CN104539037B (en) | 2016-06-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453106A (en) * | 2007-11-30 | 2009-06-10 | 北京市电力公司 | Solid converting switch, thyristor valve body and reinforced switching method |
| CN103094980A (en) * | 2011-11-03 | 2013-05-08 | 和硕联合科技股份有限公司 | Backup power control system |
| US20140139122A1 (en) * | 2012-11-19 | 2014-05-22 | Integrated Illumination Systems, Inc. | Systems and methods for multi-state power management |
| CN204068410U (en) * | 2014-06-13 | 2014-12-31 | 刘卡丁 | Urban track traffic light current integrated UPS system |
| CN204334108U (en) * | 2015-01-20 | 2015-05-13 | 云南电网有限责任公司带电作业分公司 | Charged employing SSTS system substitutes the system of 10kV transformer |
-
2015
- 2015-01-20 CN CN201510027235.4A patent/CN104539037B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453106A (en) * | 2007-11-30 | 2009-06-10 | 北京市电力公司 | Solid converting switch, thyristor valve body and reinforced switching method |
| CN103094980A (en) * | 2011-11-03 | 2013-05-08 | 和硕联合科技股份有限公司 | Backup power control system |
| US20140139122A1 (en) * | 2012-11-19 | 2014-05-22 | Integrated Illumination Systems, Inc. | Systems and methods for multi-state power management |
| CN204068410U (en) * | 2014-06-13 | 2014-12-31 | 刘卡丁 | Urban track traffic light current integrated UPS system |
| CN204334108U (en) * | 2015-01-20 | 2015-05-13 | 云南电网有限责任公司带电作业分公司 | Charged employing SSTS system substitutes the system of 10kV transformer |
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| CN104539037B (en) | 2016-06-22 |
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Address after: No.1 yangxianpo, Wuhua District, Kunming, Yunnan 650033 Patentee after: Transmission branch of Yunnan Power Grid Co.,Ltd. Address before: No. 201, Baita Road, Panlong District, Kunming, Yunnan 650011 Patentee before: YUNNAN POWER GRID Co.,Ltd. CHARGED OPERATION BRANCH |
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