CN102122811A - Protective device starting component for double A/D sampling of electronic transformer in digital substation - Google Patents
Protective device starting component for double A/D sampling of electronic transformer in digital substation Download PDFInfo
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- CN102122811A CN102122811A CN2011100644043A CN201110064404A CN102122811A CN 102122811 A CN102122811 A CN 102122811A CN 2011100644043 A CN2011100644043 A CN 2011100644043A CN 201110064404 A CN201110064404 A CN 201110064404A CN 102122811 A CN102122811 A CN 102122811A
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Abstract
The invention discloses a protective device starting component for double A/D sampling of an electronic transformer in a digital substation. The component is characterized in that an A/D sampling loop 1 is connected with a sampling value processing module 1 and then discriminates the action of a protection starting component and computes a protection function component; an A/D sampling loop 2 is connected with a sampling value processing module 2 and then discriminates the action of a repeated sampling starting component; and a device exit loop is allowed to open when the action signals of the protection starting component and the repeated sampling starting component act simultaneously, and at the same time, when the protection function component acts, the action exit signal of the device is output. By the method, the protective device can be effectively prevented from carrying out faulty action when one of the input double A/D data is abnormal.
Description
Technical field
The invention belongs to the power system automation technology field, relate to a kind of protective device starting component that is used for digitalizing transformer substation electronic transducer double A/D sampling circuit.
Background technology
Compare with traditional instrument transformer, electronic mutual inductor has overwhelming superiority at aspects such as insulation property, dynamic range, anti-saturation performance, floor spaces, and especially it is easy to the characteristics of digital data transmission, more can comply with the needs of electric power system engineering development.Along with electric power digital transformer station constantly builds and development, and GIS, the HGIS widespread usage in power engineering, electronic mutual inductor more and more applies among each electric pressure electrical network.
According in the state net Q/GDW441-2010 of the company intelligent substation Protection Technology standard to the specification requirement of electronic mutual inductor; should there be the two independent sampling system to sample in the electronic mutual inductor; every road sampling system should adopt double A/D to insert MU, and with one of double A/D data to prevent to import misoperation when unusual of taking measures of this claimed device.
In order to prevent protective device malfunction when one of double A/D sampled data is unusual; the normal employing among identical two block protection function CPU modules or the block protection CPU of traditional method backed up out identical two parts defencive function module; then two-way A/D sampled data is input to two defencive function modules or module respectively; when two defencive function modules (module) when all moving, just allow protective device output action outlet signal.But adopt two defencive function CPU modules to increase the complexity of protective device hardware designs, increased the device Financial cost; adopt two defencive function modules to increase the weight of the CPU operation processing burden again; and; when system breaks down when if the fault amount is in protection actuating range border, two defencive function modules (module) may occur and can't move simultaneously because of the sampling error of calculation and cause the protective device tripping.
Summary of the invention
For addressing the above problem, the present invention aims to provide a kind of protective device starting component that is used for digitalizing transformer substation electronic transducer double A/D sampling circuit, protective device generation misoperation in the time of can preventing that one of double A/D data of importing are unusual.
On the original protection starting component in protective device CPU module and the basis of defencive function element; increase a second mining starting component again; just open and protection device action outlet when the protection starting component that uses the double A/D sampled data respectively and second mining starting component move simultaneously; protective device generation misoperation in the time of can preventing effectively that one of double A/D data of importing are unusual, and have good applicability.
For addressing the above problem; the present invention realizes by following technical scheme; a kind of protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling; it is characterized in that; A/D sampling circuit one links to each other with sampled value processing module one; protect the starting component action to differentiate and the calculating of defencive function element then; A/D sampling circuit two links to each other with sampled value processing module two; carrying out the action of second mining starting component then differentiates; when moving simultaneously, the actuating signal of described protection starting component and second mining starting component allows the open system outlet loop, simultaneously output device action outlet signal when the defencive function element moves.
The protective device starting component of aforesaid digitalizing transformer substation electronic transducer double A/D sampling is characterized in that: described second mining starting component is identical with the action logic of protection starting component with the action logic of second mining starting component.
The protective device starting component of aforesaid digitalizing transformer substation electronic transducer double A/D sampling; it is characterized in that: sampled value processing module one is calculated all of ac data of using in the protective device; output to protection starting component and defencive function element; sampled value processing module two is only calculated influence protection action outlet result's of ac data, outputs to the second mining starting component.
The protective device starting component of aforesaid digitalizing transformer substation electronic transducer double A/D sampling is characterized in that: the action threshold in the second mining starting component is less than the action threshold of protection starting component.
The protective device of aforesaid digitalizing transformer substation electronic transducer double A/D sampling is characterized in that: the action threshold in the second mining starting component dwindles 5% than the action threshold of protection starting component.
The invention has the beneficial effects as follows: method of the present invention can prevent effectively that protective device from misoperation taking place when one of double A/D data of importing are unusual; simultaneously; this scheme does not have the device hardware-in-the-loop and changes; and the second cover sampled value processing module and second mining starting component overall logic operand are very little; influence to protection CPU treatment effeciency is very small, is suitable for the protective device of electronic mutual inductor double A/D sampling in the digital transformer substation.
Description of drawings
Fig. 1 is the related work schematic diagram of the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling of the present invention.
Embodiment
The present invention includes following components:
Sampled value is handled: set up two and overlap independently sampled value processing module in protection CPU, the corresponding respectively sampled value that receives electronic mutual inductor double A/D loop.Two sampled value processing modules are independently calculated separately, noly anyly influence each other and get in touch.
The second mining starting component is set: the effect of the starting component of protective device is open and protection function element and device outlet loop.On original protection starting component of protective device and defencive function element basis, this programme is set up a second mining starting component, and the action logic of second mining starting component is identical with original protection starting component.
The protection work-based logic: the first cover sampled value module data is input to original protection starting component and defencive function element, and the second cover sampled value module data is input to the second mining starting component that increases newly.When protection activation members element and second mining starting component move simultaneously, just open and protection function element and device outlet loop.
Two of ac sampled value data processing modules that are provided with among the protection CPU, first sampled value module is calculated all of ac data of using in the protective device, outputs to protection starting component and defencive function element.Second sampling module only calculates and can influence protect action to export result's of ac data, outputs to the second mining starting component.
The second mining starting component is identical with the logic of former protection starting component, as has Starting mode such as jump-value of current startup, zero-sequence current startup, the startup of phase current overcurrent.Action threshold in the second mining starting component is compared with the action threshold of former protection starting component, all suitably dwindles 5%, and is former thereby appear at the situation that the second mining starting component can't move under the situation of identical of ac because of electronic mutual inductor double A/D sampling error to prevent.
When system breaks down, if the sampling of electronic mutual inductor double A/D loop all just often, protect starting component and second mining starting component to move simultaneously, then open and protection function element and device outlet loop; Latch-up protection starting component and defencive function element when unusual if electronic mutual inductor first via A/D samples; locking second mining starting component when unusual if the second road A/D samples; simultaneously, when only having an action, send two kinds of starting components the inconsistent signal of double A/D starting state in such cases.
Below announced the present invention with preferred embodiment, so it is not in order to restriction the present invention, and all technical schemes that scheme obtained of taking to be equal to replacement or equivalent transformation all drop in protection scope of the present invention.
Claims (5)
1. the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling; it is characterized in that; A/D sampling circuit one links to each other with sampled value processing module one; protect the starting component action to differentiate and the calculating of defencive function element then; A/D sampling circuit two links to each other with sampled value processing module two; carrying out the action of second mining starting component then differentiates; when moving simultaneously, the actuating signal of described protection starting component and second mining starting component allows the open system outlet loop, simultaneously output device action outlet signal when the defencive function element moves.
2. the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling according to claim 1 is characterized in that: described second mining starting component is identical with the action logic of protection starting component with the action logic of second mining starting component.
3. the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling according to claim 1 and 2; it is characterized in that: sampled value processing module one is calculated all of ac data of using in the protective device; output to protection starting component and defencive function element; sampled value processing module two is only calculated influence protection action outlet result's of ac data, outputs to the second mining starting component.
4. the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling according to claim 1 and 2 is characterized in that: the action threshold in the second mining starting component is less than the action threshold of protection starting component.
5. the protective device starting component of digitalizing transformer substation electronic transducer double A/D sampling according to claim 4 is characterized in that: the action threshold in the second mining starting component dwindles 5% than the action threshold of protection starting component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100644043A CN102122811B (en) | 2011-03-17 | 2011-03-17 | Protective device starting component for double A/D sampling of electronic transformer in digital substation |
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| CN2011100644043A CN102122811B (en) | 2011-03-17 | 2011-03-17 | Protective device starting component for double A/D sampling of electronic transformer in digital substation |
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| CN102122811A true CN102122811A (en) | 2011-07-13 |
| CN102122811B CN102122811B (en) | 2013-11-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570425A (en) * | 2012-02-16 | 2012-07-11 | 国电南瑞科技股份有限公司 | Start AD (analog-to-digital) start component acting method applied to microcomputer protection for double-AD sampling |
| CN102684151A (en) * | 2012-04-28 | 2012-09-19 | 辽宁省电力有限公司朝阳供电公司 | Dual-redundancy A/D (analog/digital) sampling signal effectiveness judgment method and relay protection method |
| CN104332297A (en) * | 2014-09-19 | 2015-02-04 | 国家电网公司 | Current transformer for microcomputer protection device |
| CN106655076A (en) * | 2016-12-29 | 2017-05-10 | 许继集团有限公司 | On-site relay protection reliability control apparatus and relay protection method |
| CN106684838A (en) * | 2016-12-29 | 2017-05-17 | 许继集团有限公司 | Local relay protection control device and relay projection method |
| CN107276011A (en) * | 2017-05-10 | 2017-10-20 | 许继电气股份有限公司 | A kind of protection device |
| CN108539706A (en) * | 2018-05-17 | 2018-09-14 | 南京南瑞继保电气有限公司 | A kind of protective relaying device signal processing method |
| US10867498B2 (en) | 2018-07-12 | 2020-12-15 | Contemporary Amperex Technology Co., Limited | Smoke alarm system |
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| CN201392502Y (en) * | 2009-04-28 | 2010-01-27 | 南京中德保护控制系统有限公司 | Sampled-data mail box type transmitting interface circuit of digitization protective device |
| CN101707130A (en) * | 2009-11-10 | 2010-05-12 | 深圳市科陆电子科技股份有限公司 | combined electronic transformer |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570425A (en) * | 2012-02-16 | 2012-07-11 | 国电南瑞科技股份有限公司 | Start AD (analog-to-digital) start component acting method applied to microcomputer protection for double-AD sampling |
| CN102570425B (en) * | 2012-02-16 | 2014-03-26 | 国电南瑞科技股份有限公司 | Start AD (analog-to-digital) start component acting method applied to microcomputer protection for double-AD sampling |
| CN102684151A (en) * | 2012-04-28 | 2012-09-19 | 辽宁省电力有限公司朝阳供电公司 | Dual-redundancy A/D (analog/digital) sampling signal effectiveness judgment method and relay protection method |
| CN102684151B (en) * | 2012-04-28 | 2015-01-07 | 辽宁省电力有限公司朝阳供电公司 | Dual-redundancy A/D (analog/digital) sampling signal effectiveness judgment method and relay protection method |
| CN104332297A (en) * | 2014-09-19 | 2015-02-04 | 国家电网公司 | Current transformer for microcomputer protection device |
| CN106684838A (en) * | 2016-12-29 | 2017-05-17 | 许继集团有限公司 | Local relay protection control device and relay projection method |
| CN106655076A (en) * | 2016-12-29 | 2017-05-10 | 许继集团有限公司 | On-site relay protection reliability control apparatus and relay protection method |
| CN106655076B (en) * | 2016-12-29 | 2019-05-14 | 许继集团有限公司 | Site reliability of relay protection control device and relay protecting method |
| CN107276011A (en) * | 2017-05-10 | 2017-10-20 | 许继电气股份有限公司 | A kind of protection device |
| CN108539706A (en) * | 2018-05-17 | 2018-09-14 | 南京南瑞继保电气有限公司 | A kind of protective relaying device signal processing method |
| CN108539706B (en) * | 2018-05-17 | 2020-01-10 | 南京南瑞继保电气有限公司 | Signal processing method of relay protection device |
| US10867498B2 (en) | 2018-07-12 | 2020-12-15 | Contemporary Amperex Technology Co., Limited | Smoke alarm system |
| US11189144B2 (en) | 2018-07-12 | 2021-11-30 | Contemporary Amperex Technology Co., Limited | Smoke alarm system |
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| Publication number | Publication date |
|---|---|
| CN102122811B (en) | 2013-11-20 |
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Owner name: GUODIAN NANJING AUTOMATION CO., LTD. Free format text: FORMER OWNER: NANJING AUTOMATION CO., LTD., CHINA ELECTRONICS CORP. Effective date: 20121026 |
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