CN102122811B - 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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- CN102122811B CN102122811B CN2011100644043A CN201110064404A CN102122811B CN 102122811 B CN102122811 B CN 102122811B CN 2011100644043 A CN2011100644043 A CN 2011100644043A CN 201110064404 A CN201110064404 A CN 201110064404A CN 102122811 B CN102122811 B CN 102122811B
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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 for digitalizing transformer substation electronic transducer double A/D sampling circuit.
Background technology
With traditional instrument transformer, compare, 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 generally application 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 company intelligent substation Protection Technology standard to the specification requirement of electronic mutual inductor; in electronic mutual inductor, should have two-way independently sampling system sample; every road sampling system should adopt double A/D access MU, and misoperation while taking measures to prevent that with this claimed device one of the double A/D of inputting data are abnormal.
In order to prevent protective device malfunction when one of double A/D sampled data is abnormal; the normal employing in identical two block protection function CPU modules or a 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 respectively to two defencive function modules or module; when two defencive function modules (module), while 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 again the CPU operation processing burden; and; when if the fault amount is in protection actuating range border when system breaks down, may occur that two defencive function modules (module) can't move simultaneously and cause the protective device tripping because of the sampling error of calculation.
Summary of the invention
For addressing the above problem, the present invention aims to provide a kind of protective device starting component 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 inputting are abnormal.
On original protection starting component in protective device CPU module and the basis of defencive function element; increase again a second mining starting component; just open and protection device action outlet when the protection starting component that uses respectively the double A/D sampled data and second mining starting component move simultaneously; protective device generation misoperation in the time of can preventing effectively that one of the double A/D of inputting data are abnormal, 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 is connected with sampled value processing module one, then protect the starting component action to differentiate and the calculating of defencive function element, A/D sampling circuit two is connected with sampled value processing module two, then carrying out the action of second mining starting component differentiates, when moving simultaneously, the actuating signal of described protection starting component and second mining starting component allows the open system outlet loop, the output device action exports signal when the defencive function element moves simultaneously.
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 protective device; output to protection starting component and defencive function element; sampled value processing module two is only calculated the of ac data of impact protection action outlet result, 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 occurring when one of double A/D data of inputting are abnormal; simultaneously; this scheme arming is put hardware-in-the-loop and is changed; and the second cover sampled value processing module and second mining starting component overall logic operand are very little; impact on protection CPU treatment effeciency is very small, is suitable for the protective device of electronic type mutual-inductor in digitalization transforming plant double A/D sampling.
The accompanying drawing explanation
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 processed: in protection CPU, set up two and overlap independently sampled value processing module, respectively the corresponding sampled value that receives electronic mutual inductor double A/D loop.Two sampled value processing modules are independently calculated separately, without any, influence each other and contact.
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 the 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 logic: first set 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 newly increases.When protecting activation members element and second mining starting component to move simultaneously, ability open and protection function element and device outlet loop.
Two of ac sampled value data processing modules that arrange in protection CPU, first sampled value module is calculated all of ac data of using in protective device, outputs to protection starting component and defencive function element.Second sampling module only calculates and can impact protect action to export the of ac data of result, outputs to the second mining starting component.
The second mining starting component is identical with the logic of former protection starting component, as has the 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%, to prevent because electronic mutual inductor double A/D sampling error is former thereby appear at the situation that in the situation of identical of ac, the second mining starting component can't move.
When system breaks down, if when electronic mutual inductor double A/D loop sampling was all normal, protection starting component and second mining starting component can move simultaneously, open and protection function element and device outlet loop; Latch-up protection starting component and defencive function element when if electronic mutual inductor first via A/D sampling is abnormal; if the second road A/D sampling is locking second mining starting component when abnormal; simultaneously, when only having an action, send two kinds of starting components in such cases the inconsistent signal of double A/D starting state.
Below with preferred embodiment, announced the present invention, so it is not intended to limiting the invention, all take to be equal to replace or technical scheme that the scheme of equivalent transformation obtains, all drop in protection scope of the present invention.
Claims (4)
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 is connected with sampled value processing module one, then protect the starting component action to differentiate and the calculating of defencive function element, A/D sampling circuit two is connected with sampled value processing module two, then carrying out the action of second mining starting component differentiates, when moving simultaneously, the actuating signal of described protection starting component and second mining starting component allows the open system outlet loop, the output device action exports signal when the defencive function element moves simultaneously, action threshold in described second mining starting component is less than the action threshold of protection starting component.
2. the protective device starting component of digitalizing transformer substation electronic transducer double A/D according to claim 1 sampling, it is characterized in that: the action logic of described second mining starting component is identical with the action logic of protecting starting component.
3. the protective device starting component of digitalizing transformer substation electronic transducer double A/D according to claim 1 and 2 sampling; it is characterized in that: sampled value processing module one is calculated all of ac data of using in protective device; output to protection starting component and defencive function element; sampled value processing module two is only calculated the of ac data of impact protection action outlet result, outputs to the second mining starting component.
4. the protective device starting component of digitalizing transformer substation electronic transducer double A/D according to claim 1 and 2 sampling, it is characterized in that: the action threshold in the second mining starting component dwindles 5% than the action threshold of protection starting component.
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| 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 CN102122811A (en) | 2011-07-13 |
| CN102122811B true CN102122811B (en) | 2013-11-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN106684838B (en) * | 2016-12-29 | 2019-05-14 | 许继集团有限公司 | Site relay protection controlling device and relay protecting 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 |
| 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 |
| CN208737642U (en) | 2018-07-12 | 2019-04-12 | 宁德时代新能源科技股份有限公司 | Smog warning 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 |
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