CN109256744A - A kind of protective relaying device high reliability analogue quantity acquiring method - Google Patents
A kind of protective relaying device high reliability analogue quantity acquiring method Download PDFInfo
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- CN109256744A CN109256744A CN201811292858.4A CN201811292858A CN109256744A CN 109256744 A CN109256744 A CN 109256744A CN 201811292858 A CN201811292858 A CN 201811292858A CN 109256744 A CN109256744 A CN 109256744A
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- analog power
- relaying device
- adc
- high reliability
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
Abstract
The invention discloses a kind of protective relaying device high reliability analogue quantity acquiring methods; use independent ADC chip as monitoring ADC chip; the analog power of data ADC chip is monitored; cpu cycle property reads analog power voltage value; when the normal range of operation that voltage value allows beyond data ADC chip, analog power abnormality alarming is generated.When analog power exception, relay protective scheme locking tripping output, combining unit is latched the output of SV message.When analog power voltage is restored to normal range of operation, relay protective scheme and combining unit exit blocking.By the way of analog power voltage is confirmed after multi collect, erroneous judgement caused by instantaneous interference is prevented.The present invention effectively prevent ADC chip to simulate the output of error in data caused by abnormity of power supply, improves the reliability of analog acquisition, by being latched local trip protection output and the output of SV message, prevents the malfunction of protective relaying device.
Description
Technical field
The invention belongs to relay protection fields, and in particular to a kind of protective relaying device high reliability analog acquisition side
Method.
Background technique
As substation develops to the direction of intelligence and site, protective relaying device integrates in-situ protection and merges single
Meta function.In-situ protection is routinely tripped using routine sampling, and local collected analog quantity is directly used in relay protective scheme and drives
Tripping, combining unit protect collected data conversion at the station domain that the SV message of standard is sent to rear class.Apparatus function
The highly integrated reliability for the acquisition of unit simulation amount proposes requirements at the higher level.
In general, ADC chip uses dual power supply, analog power is supplied to chip interior AFE(analog front end) and A/D switching core
Electricity, digital power are powered to digital interface, for transmitting translated data to CPU.Protective relaying device analog acquisition at present
Working condition judgement and data check have been done to the digital interface of ADC chip in system, can be effectively ensured ADC chip and CPU it
Between the reliability transmitted, and ADC analog power part does not do any monitoring, not to the extremely caused error in data of analog power
It is taken precautions against.When analog power exception, ADC transformation result mistake is sent to protection CPU in the transformation result of mistake, may lead
False protection is caused, combining unit is above sent to and then passes through SV and be transmitted to rear class, may cause rear class false protection, therefore to simulation electricity
Source is monitored that the reliability for improving analog acquisition is particularly important.
Summary of the invention
In view of the above-mentioned problems, being used the present invention provides a kind of protective relaying device high reliability analogue quantity acquiring method
A piece of independent ADC chip, monitors the analog power of data ADC chip, is sentenced according to collected analog power voltage
The disconnected normal range of operation for whether exceeding ADC chip, if going beyond the scope, on send alarm, locking tripping output and SV message are defeated
Out, to effectively prevent error action of device, device reliability is improved.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of protective relaying device high reliability analogue quantity acquiring method, which is characterized in that analog quantity enters data ADC core
Piece, the data acquisition module of CPU is transferred to by bus 1, and data acquisition module passes data to relay protective scheme and merges single
Member, for relay protective scheme by operation control locally tripping output, combining unit will acquire data after treatment with SV message format
Output.Data ADC uses analog power and digital power dual power supply.
Further, which is characterized in that use a piece of independent ADC chip as monitoring ADC chip, by data ADC's
Analog power access monitoring ADC chip, judges mould for the monitoring that collected analog power voltage is sent into CPU by bus 2
Block.
Further, which is characterized in that CPU monitors the analog power electric power thus supplied of data ADC by monitoring ADC in real time,
When analog power exceeds the permission working range of data ADC, abnormity of power supply alarm is generated, which is fed back into protection
Logic and combining unit.
Further, which is characterized in that analog power voltage acquisition prevents instantaneous in such a way that multi collect confirms again
Erroneous judgement caused by interference.
Further, which is characterized in that relay protective scheme is according to analog power abnormality alarming, locking tripping outlet.Further
Combining unit is latched the output of SV message according to analog power abnormality alarming.When analog power exception, prevent data ADC from collecting
Wrong data used, latch-up protection at this time tripping outlet prevent local false protection, while be latched SV message output prevent
Rear class false protection improves the reliability of analog acquisition, prevents protective relaying device malfunction.
The beneficial effects of the present invention are:
The protective relaying device high reliability analogue quantity acquiring method, by analog power voltage carry out in real time monitoring and
Judgement, according to the warning information of generation, latch-up protection tripping outlet, locking SV message output improves the reliable of analog acquisition
Property, it is effectively prevent false protection caused by power-supply fluctuation, improves the operational reliability of protective device.
Detailed description of the invention
Fig. 1 is comprising modules schematic diagram of the invention；
Fig. 2 is decision logic flow chart of the invention.
Specific embodiment
Technical solution of the present invention is described in further detail with specific embodiment with reference to the accompanying drawing, so that ability
The technical staff in domain can better understand the present invention and can be practiced, but illustrated embodiment is not as to limit of the invention
It is fixed.
A kind of protective relaying device high reliability analogue quantity acquiring method, which is characterized in that analog quantity enters data ADC core
Piece, the data acquisition module of CPU is transferred to by bus 1, and data acquisition module passes data to relay protective scheme and merges single
Member, for relay protective scheme by operation control locally tripping output, combining unit will acquire data after treatment with SV message format
Output.Data ADC uses analog power and digital power dual power supply.
It will by bus 2 by the analog power access monitoring ADC chip of data ADC using a piece of independent ADC chip
Collected analog power voltage is sent into the monitoring judgment module in CPU.
CPU is by monitoring that ADC monitors the analog power electric power thus supplied of data ADC in real time, when analog power exceeds data ADC
Permission working range when, generate abnormity of power supply alarm, which is fed back into relay protective scheme and combining unit.
Analog power voltage acquisition prevents erroneous judgement caused by instantaneous interference in such a way that multi collect confirms again.
Relay protective scheme is according to analog power abnormality alarming, locking tripping outlet.Further combining unit is according to analog power
Abnormality alarming, locking SV message output.When analog power exception, prevent the collected wrong data of data ADC from being used, at this time
Latch-up protection tripping outlet prevents local false protection, while being latched the output of SV message and prevent rear class false protection, improves simulation
The reliability for measuring acquisition, prevents protective relaying device malfunction.
As shown in Figure 1, data ADC analog power voltage rating is 5V, normal range of operation is 4.75V~5.25V.Monitoring
ADC is powered using independent digital power, with monitored analog power without direct-coupling relationship, when guaranteeing analog power exception,
Monitoring ADC can accurately measure real-time voltage value.
As shown in Fig. 2, cpu cycle property reads monitoring ADC sampled value by bus 2, allow work with data ADC in real time
Voltage compares.When continuously reading voltage three times beyond normal range of operation, that is, when being greater than 5.25V or being lower than 4.75V, produce
Raw analog power abnormality alarming.Relay protective scheme receives the alarm, then is latched tripping output, and combining unit receives the alarm, then closes
Lock the output of SV message.When analog power voltage restores normal, relay protective scheme and combining unit exit blocking.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure made by bright specification and accompanying drawing content perhaps equivalent process transformation or be directly or indirectly used in other correlation
Technical field, be included within the scope of the present invention.
Claims (11)
1. a kind of protective relaying device high reliability analogue quantity acquiring method, which is characterized in that analog quantity enters data ADC core
Piece, the data acquisition module of CPU is transferred to by bus 1, and data acquisition module passes data to relay protective scheme and merges single
Member, for relay protective scheme by operation control locally tripping output, combining unit will acquire data after treatment with SV message format
Output.
2. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 1, wherein data ADC is adopted
With analog power and digital power dual power supply.
3. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 2, which is characterized in that make
Use a piece of independent ADC chip as monitoring ADC chip, by the analog power access monitoring ADC chip of data ADC, by total
Collected analog power voltage is sent into the monitoring judgment module in CPU by line 2.
4. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 3, which is characterized in that
CPU is by monitoring that ADC monitors the analog power electric power thus supplied of data ADC in real time, when analog power exceeds the permission work of data ADC
When making range, abnormity of power supply alarm is generated, which is fed back into relay protective scheme and combining unit.
5. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 3, which is characterized in that mould
Quasi- supply voltage acquisition prevents erroneous judgement caused by instantaneous interference in such a way that multi collect confirms again.
6. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 3, which is characterized in that prison
It is powered depending on ADC using independent digital power, with monitored analog power without direct-coupling relationship, guarantees that analog power is abnormal
When, monitoring ADC can accurately measure real-time voltage value.
7. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 4, which is characterized in that protect
Logic is protected according to analog power abnormality alarming, locking tripping outlet.
8. a kind of protective relaying device high reliability analogue quantity acquiring method, feature according to claim 4 or 7 exist
In combining unit is latched the output of SV message according to analog power abnormality alarming.
9. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 8, which is characterized in that when
When analog power voltage restores normal, relay protective scheme and combining unit exit blocking.
10. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 4, which is characterized in that
Wherein data ADC analog power voltage rating is 5V, and allowing working range is 4.75V~5.25V.
11. a kind of protective relaying device high reliability analogue quantity acquiring method according to claim 5, which is characterized in that
Wherein multi collect includes but is not limited to be more than or equal to 3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292858.4A CN109256744B (en) | 2018-11-01 | 2018-11-01 | High-reliability analog quantity acquisition method for relay protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811292858.4A CN109256744B (en) | 2018-11-01 | 2018-11-01 | High-reliability analog quantity acquisition method for relay protection device |
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| CN109256744A true CN109256744A (en) | 2019-01-22 |
| CN109256744B CN109256744B (en) | 2020-09-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742721A (en) * | 2019-03-15 | 2019-05-10 | 国网江苏省电力有限公司 | A kind of combining unit data error-proof device |
| CN110783882A (en) * | 2019-10-31 | 2020-02-11 | 南京国电南自电网自动化有限公司 | Protection device control method and circuit based on working state of AD chip |
| CN110783899A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN110783900A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN111722059A (en) * | 2020-06-28 | 2020-09-29 | 国电南瑞科技股份有限公司 | Power supply monitoring method and device for relay protection |
| CN112234586A (en) * | 2020-09-15 | 2021-01-15 | 国电南瑞科技股份有限公司 | Relay protection device locking loop system and method |
| CN113161989A (en) * | 2021-04-27 | 2021-07-23 | 长城电源技术有限公司 | Digital power supply, fault detection circuit and method thereof, and computer readable storage medium |
| CN113376552A (en) * | 2021-06-04 | 2021-09-10 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
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| CN109742721A (en) * | 2019-03-15 | 2019-05-10 | 国网江苏省电力有限公司 | A kind of combining unit data error-proof device |
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| CN110783882A (en) * | 2019-10-31 | 2020-02-11 | 南京国电南自电网自动化有限公司 | Protection device control method and circuit based on working state of AD chip |
| CN111722059A (en) * | 2020-06-28 | 2020-09-29 | 国电南瑞科技股份有限公司 | Power supply monitoring method and device for relay protection |
| CN112234586A (en) * | 2020-09-15 | 2021-01-15 | 国电南瑞科技股份有限公司 | Relay protection device locking loop system and method |
| CN113161989A (en) * | 2021-04-27 | 2021-07-23 | 长城电源技术有限公司 | Digital power supply, fault detection circuit and method thereof, and computer readable storage medium |
| CN113161989B (en) * | 2021-04-27 | 2022-11-04 | 长城电源技术有限公司 | Digital power supply, fault detection circuit and method thereof, and computer readable storage medium |
| CN113376552A (en) * | 2021-06-04 | 2021-09-10 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
| CN113376552B (en) * | 2021-06-04 | 2023-10-27 | 北京四方继保工程技术有限公司 | Switching value testing device and method |
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| CN109256744B (en) | 2020-09-01 |
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