CN114093140A - Nuclear power plant transformer gas relay alarm system - Google Patents
Nuclear power plant transformer gas relay alarm system Download PDFInfo
- Publication number
- CN114093140A CN114093140A CN202111211703.5A CN202111211703A CN114093140A CN 114093140 A CN114093140 A CN 114093140A CN 202111211703 A CN202111211703 A CN 202111211703A CN 114093140 A CN114093140 A CN 114093140A
- Authority
- CN
- China
- Prior art keywords
- gas
- relay
- gas relay
- signal
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- 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
- H02H7/04—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 for transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to a nuclear power plant transformer gas relay alarm system, which comprises a gas relay module and a signal output control module, wherein the gas relay module is connected with the signal output control module; the gas relay module comprises a first gas relay, a second gas relay and a third gas relay, and the first gas relay, the second gas relay and the third gas relay are connected in parallel and are arranged on a connecting pipeline of the transformer oil tank and the transformer oil conservator; the protection signal output control module receives protection signals sent by the first gas relay, the second gas relay and the third gas relay, and outputs the protection signals after voting by a two-out-of-three redundant signal; and the protection signal output control module can output the protection signal voted by the two-out-of-three redundant signal only when at least two gas relays act. The nuclear power plant transformer gas relay alarm system is high in reliability and strong in practicability.
Description
Technical Field
The invention relates to the technical field of relay protection of power plants, in particular to a gas relay alarm system of a transformer of a nuclear power plant.
Background
The gas relay, also called as gas relay, is a protector for transformer, and is installed in the pipeline between the oil storage cabinet and oil tank of transformer, when the oil is decomposed to produce gas or the oil flow is surged by the internal fault of transformer, the contact of gas relay is actuated to connect the designated control loop, and send out signal alarm (light gas) or start the protective element to automatically cut off the transformer (heavy gas). Transformers are typically configured with only a single buchholz relay, and failure thereof can cause malfunction or rejection of the associated equipment. The transformer of the nuclear power plant mainly comprises a main transformer, a plant transformer, an auxiliary transformer, an excitation transformer and the like, and abnormal actions of the relay protection device can cause that part of equipment can not normally run, even accidents such as shutdown and shutdown can be caused, so that the configuration optimization of the gas relay alarm function of the transformer of the nuclear power plant through corresponding technical means has practical significance.
Disclosure of Invention
Therefore, the nuclear power plant transformer gas relay alarm system with high reliability and strong practicability is needed to solve the problem that the gas relay can cause misoperation or refusal of associated equipment when in fault.
In order to achieve the above purpose, the invention provides the following technical scheme:
a nuclear power plant transformer gas relay alarm system comprises a gas relay module and a signal output control module;
the gas relay module comprises a first gas relay, a second gas relay and a third gas relay, and the first gas relay, the second gas relay and the third gas relay are connected in parallel and are arranged on a connecting pipeline of the transformer oil tank and the transformer oil conservator;
the protection signals of the first gas relay, the second gas relay and the third gas relay are all sent to a protection signal output control module;
the protection signal output control module receives protection signals sent by the first gas relay, the second gas relay and the third gas relay, and outputs the protection signals after voting by a two-out-of-three redundant signal;
and the protection signal output control module can output the protection signal voted by the two-out-of-three redundant signal only when at least two gas relays act.
The working principle is as follows: when the nuclear power plant transformer gas relay alarm system is used, three gas relays are installed on a connecting pipeline of a transformer oil tank and a transformer oil conservator in parallel, and when a slight fault occurs in a transformer, gas generated by oil decomposition enters the gas relays to trigger light gas alarm; when the interior of the transformer is seriously failed, strong gas is generated to push oil flow to enter a gas relay, and heavy gas alarm is triggered. The protection signals of each gas relay are output to the upper-layer interlocking protection system after being subjected to AND operation in pairs, so that the protection device is prevented from being mistakenly operated or refused to a greater extent, and the reliability of the protection signals is ensured.
Further, the first gas relay, the second gas relay and the third gas relay are all double-floater gas relays.
Furthermore, the protection signal output control module votes the protection signals sent by the first gas relay, the second gas relay and the third gas relay through a two-out-of-three redundant signal, and the method comprises the following steps: the protection signal output control module outputs protection signals of the first gas relay, the second gas relay and the third gas relay after pairwise taking and then taking or;
and at least two gas relays act, and the protection signal output control module can output the protection signal after two-by-two AND and then OR.
Further, the protection signal sent by the gas relay comprises no signal, a light gas signal and a heavy gas signal.
Further, when at least two of the first gas relay, the second gas relay and the third gas relay send protection signals which are light gas signals or heavy gas signals, the protection signal output control module outputs the protection signals of the first gas relay, the second gas relay and the third gas relay after the protection signals are pairwise taken and then taken or taken.
Further, when the protection signal output control module takes an and of the protection signals of the first gas relay, the second gas relay and the third gas relay, the method comprises the following steps:
if the protection signal of one of the gas relays is a heavy gas signal and the protection signal of the other gas relay is a no signal/light gas signal/heavy gas signal, and the AND result is that the protection signal of the gas relay is a heavy gas signal;
if the protection signal of one of the buchholz relays is a light buchholz signal and the protection signal of the other buchholz relay is a no signal/light buchholz signal, the AND result is that the protection signal of the buchholz relay is a light buchholz signal.
Further, when the protection signal output control module performs an and operation on the protection signals of the first gas relay, the second gas relay and the third gas relay in pairs, the protection signal output control module performs an or operation on the protection signals of the first gas relay, the second gas relay and the third gas relay, and the protection signal output control module comprises the following steps:
taking the protection signals of the first gas relay, the second gas relay and the third gas relay in pairs and further taking the result of 'AND' in pairs, if the result of taking the 'AND' in pairs is a heavy gas signal and the result of taking the 'AND' in pairs in the other is a light gas signal, taking the result of 'OR' is that the protection signal of the gas relay is a heavy gas signal or a light gas signal, and outputting the result of 'OR' by a protection signal output control module;
if the result of taking the AND in two of the two signals is the heavy gas signal, and the result of taking the AND in two of the other signals is the heavy gas signal, the result of taking the OR is that the protection signal of the gas relay is the heavy gas signal, and the protection signal output control module outputs the result of taking the OR.
Furthermore, the first gas relay, the second gas relay and the third gas relay are all horizontally arranged on a connecting pipeline of the transformer oil tank and the transformer oil conservator.
Furthermore, the first gas relay, the second gas relay and the third gas relay are respectively close to the A-phase high-voltage side lifting seat of the transformer, the B-phase high-voltage side lifting seat of the transformer and the C-phase high-voltage side lifting seat of the transformer.
Further, the gas relay module further comprises a first oil conservator isolation valve, a second oil conservator isolation valve and a third oil conservator isolation valve, wherein the first oil conservator isolation valve, the second oil conservator isolation valve and the third oil conservator isolation valve are respectively arranged on a connecting pipeline on one side, close to the transformer oil conservator, of the first gas relay, the second gas relay and the third gas relay.
Further, the buchholz relay module further comprises a first buchholz relay isolating valve, a second buchholz relay isolating valve and a third buchholz relay isolating valve, wherein the first buchholz relay isolating valve, the second buchholz relay isolating valve and the third buchholz relay isolating valve are respectively arranged on a connecting pipeline on one side, close to the transformer oil tank, of the first buchholz relay, the second buchholz relay and the third buchholz relay.
The invention has the beneficial technical effects that:
according to the nuclear power plant transformer gas relay alarm system, the number of the gas relays is economically and reasonably configured, the three-out-of-two protection action logic is voted by adopting the three-redundant signal, so that the gas relays can be prevented from being mistakenly operated and can also be prevented from being refused to be operated, the fault judgment accuracy of the protection device and the operation reliability of the transformer are further improved, and accidents such as non-stop of a nuclear power plant are avoided to a certain extent.
Drawings
FIG. 1 is a schematic structural diagram of a gas relay module of the warning system of the nuclear power plant transformer gas relay;
FIG. 2 is a schematic diagram of the alarm logic of the signal output control module of the alarm system of the transformer gas relay in the nuclear power plant.
In the figure, 1, a first gas relay; 2. a second buchholz relay; 3. a third gas relay; 4. a first conservator isolation valve; 5. a second conservator isolation valve; 6. a third conservator isolation valve; 7. a first gas relay isolation valve; 8. a second buchholz relay isolation valve; 9. a third gas relay isolation valve; 10. a transformer A phase high voltage side lifting seat; 11. a B-phase high-voltage side lifting seat of the transformer; 12. a C-phase high-voltage side lifting seat of the transformer; 13. a transformer conservator; 14. transformer tank.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
Referring to fig. 1-2, the invention provides a nuclear power plant transformer buchholz relay alarm system, which comprises a buchholz relay module and a signal output control module;
the gas relay module comprises a first gas relay 1, a second gas relay 2 and a third gas relay 3, wherein the first gas relay 1, the second gas relay 2 and the third gas relay 3 are installed on a connecting pipeline of a transformer oil tank 14 and a transformer oil conservator 13 in parallel;
the protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 are all sent to a protection signal output control module;
the protection signal output control module receives protection signals sent by the first gas relay 1, the second gas relay 2 and the third gas relay 3, votes the protection signals by a two-out-of-three redundant signal and outputs the voted protection signals;
and the protection signal output control module can output the protection signal voted by the two-out-of-three redundant signal only when at least two gas relays act.
And the first gas relay 1, the second gas relay 2 and the third gas relay 3 are all double-floater gas relays.
The protection signal output control module votes the protection signals sent by the first gas relay 1, the second gas relay 2 and the third gas relay 3 through a two-out-of-three redundant signal, and the protection signal output control module comprises the following steps: the protection signal output control module outputs protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 after pairwise AND and Re-OR;
and at least two gas relays act, and the protection signal output control module can output the protection signal after two-by-two AND and then OR.
The protection signal that buchholz relay sent includes no signal, light gas signal and heavy gas signal.
When at least two gas relays in the first gas relay 1, the second gas relay 2 and the third gas relay 3 send protection signals which are light gas signals or heavy gas signals, the protection signal output control module outputs the protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 after the protection signals are pairwise taken and then taken or again.
When the protection signal output control module takes AND for the protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 in pairs, the method comprises the following steps:
if the protection signal of one of the gas relays is a heavy gas signal and the protection signal of the other gas relay is a no signal/light gas signal/heavy gas signal, and the AND result is that the protection signal of the gas relay is a heavy gas signal;
if the protection signal of one of the buchholz relays is a light buchholz signal and the protection signal of the other buchholz relay is a no signal/light buchholz signal, the AND result is that the protection signal of the buchholz relay is a light buchholz signal.
When the protection signal output control module takes the protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 two by two and then takes the protection signals of the second gas relay and the third gas relay or the protection signals of the third gas relay, the method comprises the following steps:
taking the protection signals of the first gas relay 1, the second gas relay 2 and the third gas relay 3 in pairs and further taking the result of 'AND' in pairs, if the result of taking 'AND' in pairs is a heavy gas signal and the result of taking 'AND' in pairs in the other is a light gas signal, taking the result of 'OR' is that the protection signal of the gas relay is a heavy gas signal or a light gas signal, and outputting the result of 'OR' by a protection signal output control module;
if the result of taking the AND in two of the two signals is the heavy gas signal, and the result of taking the AND in two of the other signals is the heavy gas signal, the result of taking the OR is that the protection signal of the gas relay is the heavy gas signal, and the protection signal output control module outputs the result of taking the OR.
And the first gas relay 1, the second gas relay 2 and the third gas relay 3 are all horizontally arranged on a connecting pipeline of the transformer oil tank 14 and the transformer oil conservator 13.
The first gas relay 1, the second gas relay 2 and the third gas relay 3 are respectively close to a transformer A-phase high-voltage side lifting seat 10, a transformer B-phase high-voltage side lifting seat 11 and a transformer C-phase high-voltage side lifting seat 12.
The gas relay module further comprises a first oil conservator isolation valve 4, a second oil conservator isolation valve 5 and a third oil conservator isolation valve 6, wherein the first oil conservator isolation valve 4, the second oil conservator isolation valve 5 and the third oil conservator isolation valve 6 are respectively arranged on a connecting pipeline on one side, close to the transformer oil conservator 13, of the first gas relay 1, the second gas relay 2 and the third gas relay 3.
The gas relay module still includes first gas relay isolating valve 7, second gas relay isolating valve 8 and third gas relay isolating valve 9, first gas relay isolating valve 7, second gas relay isolating valve 8 and third gas relay isolating valve 9 set up respectively on the connecting pipe way that first gas relay 1, second gas relay 2 and third gas relay 3 are close to transformer tank 14 one side.
When the nuclear power plant transformer gas relay alarm system is used, three pipelines with the same specification are equidistantly arranged beside the A-phase, B-phase and C-phase high-voltage side lifting seats of the transformer, a transformer oil tank 14 is connected with a transformer oil conservator 13, a double-floater gas relay is arranged at the horizontal section of each pipeline, when a slight fault occurs in the transformer, gas generated by oil decomposition enters the gas relay, and the upper floater acts to trigger light gas alarm; when the interior of the transformer is seriously failed, strong gas is generated to push oil flow to impact the lower floater, and heavy gas alarm is triggered.
There are two failure modes of action for a single buchholz relay: the invention adopts a three-out-of-two redundant configuration, namely, each gas relay protection signal is subjected to two-out AND and then is subjected to two-out operation or is output to an upper-layer interlocking protection system, and if the single relay error operation probability and the single action rejection probability are both 0.01, the integral error operation probability is 0.0003, and the action rejection probability is 0.000008, 1/30 of the single gas relay error operation probability and 1/1250 of the action rejection probability are only configured, so that the protection device is prevented from being subjected to the error operation or the action rejection to a greater extent, and the reliability of the protection signal is further ensured.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A nuclear power plant transformer gas relay alarm system is characterized by comprising a gas relay module and a signal output control module;
the gas relay module comprises a first gas relay (1), a second gas relay (2) and a third gas relay (3), and the first gas relay (1), the second gas relay (2) and the third gas relay (3) are installed on a connecting pipeline of a transformer oil tank (14) and a transformer conservator (13) in parallel;
the protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3) are all sent to a protection signal output control module;
the protection signal output control module receives protection signals sent by a first gas relay (1), a second gas relay (2) and a third gas relay (3), votes the protection signals by a two-out-of-three redundant signal and outputs the protection signals;
and the protection signal output control module can output the protection signal voted by the two-out-of-three redundant signal only when at least two gas relays act.
2. The nuclear power plant transformer gas relay alarm system according to claim 1, wherein the protection signal output control module votes the protection signals sent by the first gas relay (1), the second gas relay (2) and the third gas relay (3) through a two-out-of-three redundant signal, and the method comprises the following steps: the protection signal output control module outputs protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3) after being subjected to two-to-two AND and then OR; and at least two gas relays act, and the protection signal output control module can output the protection signal after two-by-two AND and then OR.
3. The nuclear power plant transformer buchholz relay alarm system according to claim 2, characterized in that the protection signals sent by the first buchholz relay (1), the second buchholz relay (2) and the third buchholz relay (3) include no signal, light buchholz signal and heavy buchholz signal.
4. The nuclear power plant transformer gas relay alarm system according to claim 3, wherein when at least two of the first gas relay (1), the second gas relay (2) and the third gas relay (3) send protection signals which are light gas signals or heavy gas signals, the protection signal output control module outputs the protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3) after the protection signals are two-by-two selected from "and" re-selected "or".
5. The nuclear power plant transformer gas relay alarm system according to claim 4, wherein when the protection signal output control module ANDs the protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3), the method comprises the following steps:
if the protection signal of one of the gas relays is a heavy gas signal and the protection signal of the other gas relay is a no signal/light gas signal/heavy gas signal, and the AND result is that the protection signal of the gas relay is a heavy gas signal;
if the protection signal of one of the buchholz relays is a light buchholz signal and the protection signal of the other buchholz relay is a no signal/light buchholz signal, the AND result is that the protection signal of the buchholz relay is a light buchholz signal.
6. The nuclear power plant transformer gas relay alarm system according to claim 5, wherein when the protection signal output control module takes an AND and then an OR for the protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3) in pairs, the method comprises the following steps:
taking the protection signals of the first gas relay (1), the second gas relay (2) and the third gas relay (3) in pairs and taking the result of AND in pairs further to take OR in pairs, if the result of taking AND in pairs is a heavy gas signal and the result of taking AND in pairs is a light gas signal, the result of taking OR is that the protection signal of the gas relay is a heavy gas signal or a light gas signal, and the protection signal output control module outputs the result of taking OR;
if the result of taking the AND in two of the two signals is the heavy gas signal, and the result of taking the AND in two of the other signals is the heavy gas signal, the result of taking the OR is that the protection signal of the gas relay is the heavy gas signal, and the protection signal output control module outputs the result of taking the OR.
7. The nuclear power plant transformer gas relay alarm system according to claim 1, wherein the first gas relay (1), the second gas relay (2) and the third gas relay (3) are horizontally arranged on a connecting pipeline of a transformer oil tank (14) and a transformer conservator (13).
8. The nuclear power plant transformer gas relay alarm system according to claim 1, wherein the first gas relay (1), the second gas relay (2) and the third gas relay (3) are respectively close to a transformer A-phase high-voltage side lifting seat (10), a transformer B-phase high-voltage side lifting seat (11) and a transformer C-phase high-voltage side lifting seat (12).
9. The nuclear power plant transformer buchholz relay alarm system according to claim 1, characterized in that the first buchholz relay (1), the second buchholz relay (2) and the third buchholz relay (3) are all double-float buchholz relays.
10. The nuclear power plant transformer gas relay alarm system according to any one of claims 1 to 9, wherein the gas relay module further comprises a first conservator isolation valve (4), a second conservator isolation valve (5) and a third conservator isolation valve (6), and the first conservator isolation valve (4), the second conservator isolation valve (5) and the third conservator isolation valve (6) are respectively arranged on a connecting pipeline on one side of the first gas relay (1), the second gas relay (2) and the third gas relay (3) close to the transformer conservator (13).
11. The nuclear power plant transformer buchholz relay alarm system according to claim 10, wherein the buchholz relay module further comprises a first buchholz relay isolation valve (7), a second buchholz relay isolation valve (8) and a third buchholz relay isolation valve (9), and the first buchholz relay isolation valve (7), the second buchholz relay isolation valve (8) and the third buchholz relay isolation valve (9) are respectively arranged on the connecting pipelines on the side of the first buchholz relay (1), the second buchholz relay (2) and the third buchholz relay (3) close to the transformer tank (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111211703.5A CN114093140A (en) | 2021-10-18 | 2021-10-18 | Nuclear power plant transformer gas relay alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111211703.5A CN114093140A (en) | 2021-10-18 | 2021-10-18 | Nuclear power plant transformer gas relay alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114093140A true CN114093140A (en) | 2022-02-25 |
Family
ID=80297204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111211703.5A Pending CN114093140A (en) | 2021-10-18 | 2021-10-18 | Nuclear power plant transformer gas relay alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114093140A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264892A (en) * | 1998-03-18 | 1999-09-28 | Mitsubishi Electric Corp | Protection device of power source system in nuclear power plant |
| CN203747375U (en) * | 2014-01-02 | 2014-07-30 | 中国电力工程顾问集团中南电力设计院 | Extra-high voltage direct-current voltage divider protection device |
| CN104362591A (en) * | 2014-10-31 | 2015-02-18 | 深圳供电局有限公司 | Method and system for preventing heavy gas protection misoperation caused by large-crossing current |
| GB201601227D0 (en) * | 2015-11-12 | 2016-03-09 | China Nuclear Power Engineering Co Ltd And China Guangdong Nuclear Power Holding Corp | Diverse actuation system and method and diverse protection system in a nuclear power plant |
| US20170365992A1 (en) * | 2014-12-15 | 2017-12-21 | Ypp Co., Ltd. | Triple redundant digital protective relay and operating method therefor |
| CN110794294A (en) * | 2019-11-02 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Device and method for detecting simulation action of double-float gas relay of 220kV transformer |
| CN112967904A (en) * | 2021-01-18 | 2021-06-15 | 国网宁夏电力有限公司检修公司 | Wiring structure of gas relay for converter transformer and signal output method |
| CN214313029U (en) * | 2021-01-18 | 2021-09-28 | 国网宁夏电力有限公司检修公司 | Wiring structure of gas relay for converter transformer |
-
2021
- 2021-10-18 CN CN202111211703.5A patent/CN114093140A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264892A (en) * | 1998-03-18 | 1999-09-28 | Mitsubishi Electric Corp | Protection device of power source system in nuclear power plant |
| CN203747375U (en) * | 2014-01-02 | 2014-07-30 | 中国电力工程顾问集团中南电力设计院 | Extra-high voltage direct-current voltage divider protection device |
| CN104362591A (en) * | 2014-10-31 | 2015-02-18 | 深圳供电局有限公司 | Method and system for preventing heavy gas protection misoperation caused by large-crossing current |
| US20170365992A1 (en) * | 2014-12-15 | 2017-12-21 | Ypp Co., Ltd. | Triple redundant digital protective relay and operating method therefor |
| GB201601227D0 (en) * | 2015-11-12 | 2016-03-09 | China Nuclear Power Engineering Co Ltd And China Guangdong Nuclear Power Holding Corp | Diverse actuation system and method and diverse protection system in a nuclear power plant |
| CN110794294A (en) * | 2019-11-02 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Device and method for detecting simulation action of double-float gas relay of 220kV transformer |
| CN112967904A (en) * | 2021-01-18 | 2021-06-15 | 国网宁夏电力有限公司检修公司 | Wiring structure of gas relay for converter transformer and signal output method |
| CN214313029U (en) * | 2021-01-18 | 2021-09-28 | 国网宁夏电力有限公司检修公司 | Wiring structure of gas relay for converter transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103400623A (en) | Protection method and system for digitalized instrument control diversity of nuclear power station | |
| CN101737100A (en) | Turbine emergency protective system capable of preventing misoperation | |
| CN109064071A (en) | A kind of secondary system of intelligent substation methods of risk assessment based on shielding failure | |
| CN108539706B (en) | Signal processing method of relay protection device | |
| CN114093140A (en) | Nuclear power plant transformer gas relay alarm system | |
| CN111681792B (en) | ATWT control device and nuclear power equipment | |
| KR101997638B1 (en) | Nuclear power plant safety system | |
| CN108471164B (en) | Intelligent detection and alarm method and device for pressing plate of transformer protection device | |
| Muhlheim et al. | Initiating events for multi-reactor plant sites | |
| CN111810300B (en) | Gas turbine protection device | |
| Duchac et al. | Disturbances in the European nuclear power plant safety related electrical systems | |
| Wang et al. | Application of functional safety theories in furnace safety supervisory system | |
| CN110018663B (en) | Fail-Safe pit car lifting machine control system | |
| CN103746351B (en) | Power system fault alarm method considering digital substation secondary circuit signal | |
| CN109818336B (en) | Relay protection system intelligent operation and maintenance strategy generation system and method based on SCD | |
| CN118331189A (en) | Safety level control system for post-treatment plant | |
| CN208337142U (en) | The transformer grounding protective device and secondary power system of nuclear power unit | |
| KR20180049490A (en) | Nuclear power plant safety system | |
| Hossain et al. | Cause and effect of catastrophic failure of shipboard and offshore vessel/platform power sources | |
| Koshy | Advancing Ruggedness of Nuclear Stations By Expanding Defence In Depth in Critical Areas | |
| Lu et al. | Analysis of the tripping and load rejection event caused by single component failure of governor oil pressure device of a large hydropower station | |
| Percival et al. | The engineering specification, design and implementation of the Sizewell B reactor secondary protection system | |
| Biao et al. | Quantitative Evaluation of System Safety Assessment Considering EWIS Failures | |
| Rolim et al. | Bayesian networks application to power transformer diagnosis | |
| Panteli et al. | Reliability assessment of SIPS based on a safety integrity level and spurious trip level |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |