CN203883493U - A structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire - Google Patents
A structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire Download PDFInfo
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- CN203883493U CN203883493U CN201420294230.9U CN201420294230U CN203883493U CN 203883493 U CN203883493 U CN 203883493U CN 201420294230 U CN201420294230 U CN 201420294230U CN 203883493 U CN203883493 U CN 203883493U
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 36
- 239000011787 zinc oxide Substances 0.000 claims description 18
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model discloses a structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire. Two wiring structures are employed. In the first scheme, two large-scale power generating sets are connected to a 100kv outdoor GIS power distribution apparatus in a factory via a power generator-voltage transformer set unit; a circuit breaker is arranged at outlets of power generators; and a main connection wire employs a combined unit wire connection type. In the second scheme, the two large-scale power generating sets are connected to the 100kv outdoor GIS power distribution apparatus in the factory via the power generator-voltage transformer set unit, and the outlets of the power generators are not provided with the circuit breaker; and the main connection line employs an uncompleted single busbar line connection type. The structure for connecting the two large-scale power generating sets with the extra high voltage outgoing wire of the utility model can satisfy wiring requirements for connection of the two large-scale power generating sets into the extra high voltage outgoing wire; the wiring reliability is high; the flexibility is high; and the economic efficiency is good.
Description
[technical field]
The utility model belongs to extra-high voltage grid technical field, is specifically related to the structure of a ultra high voltage outlet of two Generator Set accesses.
[background technology]
First domestic highest voltage level extra-high-voltage alternating current demonstration project, it is 1000 kilovolts of AC input transformation engineerings with independent intellectual property right---the southeast-Nanyang, Shanxi-Jingmen UHVAC demonstration project of China's independent research, design and establishing, 640 kilometers of total lengths, vertical across Jin Yu E Sansheng, wherein also comprise two big across in the Yellow River and Han River.Circuit rises from 1000kV Shanxi, Shanxi southeast transformer station, through 1000kV Nanyang, Henan switchyard, terminates in 1000kV Jingmen, Hubei transformer station.22 o'clock on the 30th December in 2008, this project drops into trial run, and 22 o'clock on the 6th January in 2009, smoothly by trial run in 168 hours.
Extra-high-speed pressure energy promotes the conveying capacity of China's electrical network greatly.The data that provide according to State Grid Corporation of China show, a loop extra-high voltage direct-current electrical network can send 6,000,000 kilowatts of electric weight, is equivalent to 5 to 6 times of existing 500 Kilovolt Direct Current nets, and power transmission distance is also 2 to 3 times of the latter, and therefore efficiency improves greatly.In addition, according to State Grid Corporation of China's measuring and calculating, carry the electric weight of same power, can be than the land resource that adopts 500 kilovolts of high-tension lines savings 60% if adopt extra high voltage line to transmit electricity.
When country drops into a large amount of human and material resources, financial resources and carries out extra-high voltage grid construction, also need to build the power supply point of large quantities of support extra-high voltage grids.Therefore be, those skilled in the art's urgent problems to the research of Generator Set access extra-high voltage grid wiring construction.
[utility model content]
The purpose of this utility model is for the deficiencies in the prior art, and the structure of a ultra high voltage outlet of a kind of two Generator Set access is provided.
For achieving the above object, the utility model adopts following technical scheme:
The structure of a ultra high voltage outlet of two Generator Set accesses, comprises the first generator 1a and the second generator 1b, wherein, the output of the first generator 1a is connected with the input of the first transformer 2a by the first circuit breaker 3a, the output of the first transformer 2a connects one end of the first high voltage isolator 5a, the output of the second generator 1b is connected with the input of the second transformer 2b by the second circuit breaker 3b, the output of the second transformer 2b connects one end of the second high voltage isolator 5b, the other end of the other end of the first high voltage isolator 5a and the second high voltage isolator 5b is all connected with one end of primary cut-out 4, the other end of primary cut-out 4 is connected with one end of the high voltage isolator 6 of configuration high speed grounding switch, the other end of the high voltage isolator 6 of configuration high speed grounding switch is connected with leading-out terminal.
The present invention further improves and is, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first inlet wire zinc oxide arrester 8a; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second inlet wire zinc oxide arrester 8b.
The present invention further improves and is, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first primary voltage instrument transformer 7a, the primary side of the first primary voltage instrument transformer 7a is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second primary voltage instrument transformer 7b, and the primary side of the second primary voltage instrument transformer 7b is connected on primary system, its secondary side joint measuring instrument and relaying protection.
The present invention further improves and is; on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with outlet voltage transformer 9; the primary side of outlet voltage transformer 9 is connected on primary system, its secondary side joint measuring instrument and relaying protection.
The present invention further improves and is, on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, is connected with zinc oxide lightning arrester for power lines 10.
The structure of a ultra high voltage outlet of two Generator Set accesses, comprises the first generator 1a and the second generator 1b, wherein, the output of the first generator 1a is connected with the input of the first transformer 2a, the output of the first transformer 2a connects one end of the first high voltage isolator 5a, the other end of the first high voltage isolator 5a connects one end of the second high voltage isolator 5b by the first primary cut-out 4a, the output of the second generator 1b is connected with the input of the second transformer 2b, the output of the second transformer 2b connects one end of third high pressure isolating switch 5c, third high presses the other end of isolating switch 5c to connect one end of the 4th high voltage isolator 5d by the second primary cut-out 4b, the other end of the other end of the second high voltage isolator 5b and the 4th high voltage isolator 5d is connected with one end of the high voltage isolator 6 of configuration high speed grounding switch, the other end of the high voltage isolator 6 of configuration high speed grounding switch is connected with leading-out terminal.
The present invention further improves and is, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first inlet wire zinc oxide arrester 8a; On the circuit of one end of the output connection third high pressure isolating switch 5c of the second transformer 2b, be connected with the second inlet wire zinc oxide arrester 8b.
The present invention further improves and is, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first primary voltage instrument transformer 7a, the primary side of the first primary voltage instrument transformer 7a is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second primary voltage instrument transformer 7b, and the primary side of the second primary voltage instrument transformer 7b is connected on primary system, its secondary side joint measuring instrument and relaying protection.
The present invention further improves and is; on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with outlet voltage transformer 9; the primary side of outlet voltage transformer 9 is connected on primary system, its secondary side joint measuring instrument and relaying protection.
The present invention further improves and is, on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, is connected with zinc oxide lightning arrester for power lines 10.
Compared with prior art, the utlity model has following advantage:
The structure of a ultra high voltage outlet of two Generator Set accesses of the utility model, in the first technical scheme: 1) primary cut-out quantity is few, only needs a primary cut-out, and equipment investment is few; 2) generator outlet installing generator outlet circuit breaker, in the time of any generator failure, only excises corresponding generating set, does not affect the operation of an other unit; Initial investment is few, and operational mode is relatively simple.In the second technical scheme: 1) investment economizes, and only installs two primary cut-outs; 2) when any element of monoblock--when generator, main transformer, factory hypermutation fault, need the corresponding unit of excision, do not affect the operation of an other unit, without having a power failure in short-term.But must switch fast station service, stand-by power source reliability requirement be played in outside high; 3) operational mode is simple.
[brief description of the drawings]
Fig. 1 is the main electrical scheme line chart of a ultra high voltage outlet scheme 1 of two Generator Set accesses;
Fig. 2 is the floor plan of a ultra high voltage outlet scheme 1 of two Generator Set accesses;
Fig. 3 is the main electrical scheme line chart of a ultra high voltage outlet scheme 2 of two Generator Set accesses;
Fig. 4 is the floor plan of a ultra high voltage outlet scheme 2 of two Generator Set accesses.
[embodiment]
Below in conjunction with drawings and Examples, the utility model is described in further details.
Referring to Fig. 1 to Fig. 4, technical problem to be solved in the utility model has been to provide the structure of a ultra high voltage outlet of a kind of two Generator Set access.
Scheme 1:
Two Generator Set are with GIS power distribution equipment outside 1000kV room in generator-transformer group unit connection access factory, and generator outlet arranges circuit breaker, and main electrical scheme adopts associated units wiring pattern.
1, main electrical scheme line chart, refers to shown in accompanying drawing 1.
Two Generator Set are with the first generator 1a, the second generator 1b, GIS power distribution equipment outside 1000kV room in the first transformer 2a and the second transformer 2b group unit connection access factory, wherein, the output of the first generator 1a is connected with the input of the first transformer 2a by the first circuit breaker 3a, the output of the first transformer 2a connects one end of the first high voltage isolator 5a, the output of the second generator 1b is connected with the input of the second transformer 2b by the second circuit breaker 3b, the output of the second transformer 2b connects one end of the second high voltage isolator 5b, the other end of the other end of the first high voltage isolator 5a and the second high voltage isolator 5b is all connected with one end of primary cut-out 4, the other end of primary cut-out 4 is connected with one end of the high voltage isolator 6 of configuration high speed grounding switch, the other end of the high voltage isolator 6 of configuration high speed grounding switch is connected with leading-out terminal.
Further, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first inlet wire zinc oxide arrester 8a; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second inlet wire zinc oxide arrester 8b.The output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first primary voltage instrument transformer 7a, and the primary side of the first primary voltage instrument transformer 7a is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second primary voltage instrument transformer 7b, and the primary side of the second primary voltage instrument transformer 7b is connected on primary system, its secondary side joint measuring instrument and relaying protection.On the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with outlet voltage transformer 9, the primary side of outlet voltage transformer 9 is connected on primary system, its secondary side joint measuring instrument and relaying protection.On the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with zinc oxide lightning arrester for power lines 10.
2, wiring pattern is described
This wiring pattern is by twice transformer unit inlet wires, and a 1000kV outlet forms associated units wiring.This wiring tool has the following advantages:
1) primary cut-out quantity is few, only needs a 1000kV primary cut-out, and equipment investment is few;
2) generator outlet installing generator outlet circuit breaker, in the time of any generator failure, only excises corresponding generating set, does not affect the operation of an other unit;
3) initial investment is few, and operational mode is relatively simple.
This wiring main transformer, factory's hypermutation in power plant have power failure in short-term while breaking down, after excision fault unit, and another machine power supply of resuming operation.Therefore, generator outlet circuit breaker is set, only establishes a 1000kV primary cut-out, the reliability of this scheme can be protected, and invests low.
In operational mode; because high-pressure side only has a circuit breaker; if the first generator 1a moves; throw the second generator 1b; need temporary stoppage, (about no-load transformer exciting current 2A, 2 main transformers are less than 5A to close 2 unloaded main transformers by circuit breaker; the ability that circuit breaker closes no-load transformer exciting current is generally below 15A), more respectively by generator outlet circuit breaker asynchronous switch-on.Therefore arrange in construction, repair time, 2 main transformers are consistent as far as possible, and are consistent with 1000kV line maintenance, can avoid back brake to shut down.
3, power distribution equipment is arranged
When outside 1000kV room, GIS power distribution equipment adopts associated units wiring to arrange, floor space is 160 meters of (laterally) × 71 meter (longitudinally).Concrete layout referred to shown in accompanying drawing 2.
Scheme 2:
Two Generator Set are with GIS power distribution equipment outside 1000kV room in generator-transformer group unit connection access factory, and generator outlet does not arrange circuit breaker, and main electrical scheme adopts incomplete single bus scheme pattern.
1, main electrical scheme line chart, refers to shown in accompanying drawing 3.
Two Generator Set are with GIS power distribution equipment outside 1000kV room in the first generator 1a, the second generator 1b, the first transformer 2a and the second transformer 2b group unit connection access factory, and the first generator 1a and the second generator 1b outlet do not arrange circuit breaker.Wherein, the output of the first generator 1a is connected with the input of the first transformer 2a, the output of the first transformer 2a connects one end of the first high voltage isolator 5a, the other end of the first high voltage isolator 5a connects one end of the second high voltage isolator 5b by the first primary cut-out 4a, the output of the second generator 1b is connected with the input of the second transformer 2b, the output of the second transformer 2b connects one end of third high pressure isolating switch 5c, third high presses the other end of isolating switch 5c to connect one end of the 4th high voltage isolator 5d by the second primary cut-out 4b, the other end of the other end of the second high voltage isolator 5b and the 4th high voltage isolator 5d is connected with one end of the high voltage isolator 6 of configuration high speed grounding switch, the other end of the high voltage isolator 6 of configuration high speed grounding switch is connected with leading-out terminal.
Further, the output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first inlet wire zinc oxide arrester 8a; On the circuit of one end of the output connection third high pressure isolating switch 5c of the second transformer 2b, be connected with the second inlet wire zinc oxide arrester 8b.The output of the first transformer 2a connects on the circuit of one end of the first high voltage isolator 5a and is connected with the first primary voltage instrument transformer 7a, and the primary side of the first primary voltage instrument transformer 7a is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer 2b connects on the circuit of one end of the second high voltage isolator 5b and is connected with the second primary voltage instrument transformer 7b, and the primary side of the second primary voltage instrument transformer 7b is connected on primary system, its secondary side joint measuring instrument and relaying protection.On the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with outlet voltage transformer 9, the primary side of outlet voltage transformer 9 is connected on primary system, its secondary side joint measuring instrument and relaying protection.On the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch 6 to be connected with leading-out terminal, be connected with zinc oxide lightning arrester for power lines 10.
2, wiring pattern is described
This wiring pattern is by twice transformer unit inlet wires, and a 1000kV outlet forms associated units wiring.This wiring tool has the following advantages:
1) investment economizes, and only installs two 1000kV primary cut-outs;
2) when any element of monoblock--when generator, main transformer, factory hypermutation fault, need the corresponding unit of excision, do not affect the operation of an other unit, without having a power failure in short-term.But must switch fast station service, stand-by power source reliability requirement be played in outside high;
3) operational mode is simple.
3, power distribution equipment is arranged
When outside 1000kV room, GIS power distribution equipment adopts associated units wiring to arrange, floor space is 160 meters of (laterally) × 71 meter (longitudinally).Concrete layout referred to shown in accompanying drawing 4.
Two kinds of wiring patterns of a ultra high voltage outlet of above-mentioned two Generator Set access, outgoing line side framework width is 53.5 meters, and the distance that center line is opened to framework root in phase flexible conductor center, limit is 11.75 meters, and the distance between alternate wire center line is 15 meters.Outgoing line side framework height is 63 meters.
Claims (10)
1. the structure of a ultra high voltage outlet of two Generator Set accesses, is characterized in that, comprises the first generator (1a) and the second generator (1b), wherein, the output of the first generator (1a) is connected with the input of the first transformer (2a) by the first circuit breaker (3a), the output of the first transformer (2a) connects one end of the first high voltage isolator (5a), the output of the second generator (1b) is connected with the input of the second transformer (2b) by the second circuit breaker (3b), the output of the second transformer (2b) connects one end of the second high voltage isolator (5b), the other end of the other end of the first high voltage isolator (5a) and the second high voltage isolator (5b) is all connected with one end of primary cut-out (4), the other end of primary cut-out (4) is connected with one end of the high voltage isolator (6) of configuration high speed grounding switch, the other end of the high voltage isolator (6) of configuration high speed grounding switch is connected with leading-out terminal.
2. the structure of a ultra high voltage outlet of two Generator Set access according to claim 1, it is characterized in that, the output of the first transformer (2a) connects on the circuit of one end of the first high voltage isolator (5a) and is connected with the first inlet wire zinc oxide arrester (8a); The output of the second transformer (2b) connects on the circuit of one end of the second high voltage isolator (5b) and is connected with the second inlet wire zinc oxide arrester (8b).
3. the structure of a ultra high voltage outlet of two Generator Set access according to claim 1, it is characterized in that, the output of the first transformer (2a) connects on the circuit of one end of the first high voltage isolator (5a) and is connected with the first primary voltage instrument transformer (7a), the primary side of the first primary voltage instrument transformer (7a) is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer (2b) connects on the circuit of one end of the second high voltage isolator (5b) and is connected with the second primary voltage instrument transformer (7b); the primary side of the second primary voltage instrument transformer (7b) is connected on primary system, its secondary side joint measuring instrument and relaying protection.
4. the structure of a ultra high voltage outlet of two Generator Set access according to claim 1; it is characterized in that; on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch (6) to be connected with leading-out terminal, be connected with outlet voltage transformer (9); the primary side of outlet voltage transformer (9) is connected on primary system, its secondary side joint measuring instrument and relaying protection.
5. the structure of a ultra high voltage outlet of two Generator Set access according to claim 1, it is characterized in that, on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch (6) to be connected with leading-out terminal, be connected with zinc oxide lightning arrester for power lines (10).
6. the structure of a ultra high voltage outlet of two Generator Set accesses, is characterized in that, comprises the first generator (1a) and the second generator (1b); wherein, the output of the first generator (1a) is connected with the input of the first transformer (2a), the output of the first transformer (2a) connects one end of the first high voltage isolator (5a), the other end of the first high voltage isolator (5a) connects one end of the second high voltage isolator (5b) by the first primary cut-out (4a), the output of the second generator (1b) is connected with the input of the second transformer (2b), the output of the second transformer (2b) connects one end of third high pressure isolating switch (5c), third high presses the other end of isolating switch (5c) to connect one end of the 4th high voltage isolator (5d) by the second primary cut-out (4b), the other end of the other end of the second high voltage isolator (5b) and the 4th high voltage isolator (5d) is connected with one end of the high voltage isolator (6) of configuration high speed grounding switch, the other end of the high voltage isolator (6) of configuration high speed grounding switch is connected with leading-out terminal.
7. the structure of a ultra high voltage outlet of two Generator Set access according to claim 6, it is characterized in that, the output of the first transformer (2a) connects on the circuit of one end of the first high voltage isolator (5a) and is connected with the first inlet wire zinc oxide arrester (8a); On the circuit of one end of the output connection third high pressure isolating switch (5c) of the second transformer (2b), be connected with the second inlet wire zinc oxide arrester (8b).
8. the structure of a ultra high voltage outlet of two Generator Set access according to claim 6, it is characterized in that, the output of the first transformer (2a) connects on the circuit of one end of the first high voltage isolator (5a) and is connected with the first primary voltage instrument transformer (7a), the primary side of the first primary voltage instrument transformer (7a) is connected on primary system, its secondary side joint measuring instrument and relaying protection; The output of the second transformer (2b) connects on the circuit of one end of the second high voltage isolator (5b) and is connected with the second primary voltage instrument transformer (7b); the primary side of the second primary voltage instrument transformer (7b) is connected on primary system, its secondary side joint measuring instrument and relaying protection.
9. the structure of a ultra high voltage outlet of two Generator Set access according to claim 6; it is characterized in that; on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch (6) to be connected with leading-out terminal, be connected with outlet voltage transformer (9); the primary side of outlet voltage transformer (9) is connected on primary system, its secondary side joint measuring instrument and relaying protection.
10. the structure of a ultra high voltage outlet of two Generator Set access according to claim 6, it is characterized in that, on the circuit that the third high of configuration high speed grounding switch presses the other end of isolating switch (6) to be connected with leading-out terminal, be connected with zinc oxide lightning arrester for power lines (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420294230.9U CN203883493U (en) | 2014-06-04 | 2014-06-04 | A structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420294230.9U CN203883493U (en) | 2014-06-04 | 2014-06-04 | A structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire |
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| Publication Number | Publication Date |
|---|---|
| CN203883493U true CN203883493U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420294230.9U Expired - Lifetime CN203883493U (en) | 2014-06-04 | 2014-06-04 | A structure for connecting two large-scale power generating sets with an extra high voltage outgoing wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183464A (en) * | 2018-01-17 | 2018-06-19 | 西安热工研究院有限公司 | A kind of judgement system and method for generator start and stop protection automatic switching |
-
2014
- 2014-06-04 CN CN201420294230.9U patent/CN203883493U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183464A (en) * | 2018-01-17 | 2018-06-19 | 西安热工研究院有限公司 | A kind of judgement system and method for generator start and stop protection automatic switching |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA Free format text: FORMER NAME: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION |
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| CP01 | Change in the name or title of a patent holder |
Address after: 710075 Xi'an province high tech Development Zone, unity South Road, No. 22, No. Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Address before: 710075 Xi'an province high tech Development Zone, unity South Road, No. 22, No. Patentee before: NORTHWEST ELECTRIC POWER DESIGN INST. OF CHINA POWER ENGINEERING CONSULTING Group |
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| CX01 | Expiry of patent term |
Granted publication date: 20141015 |