CN108008676A - A kind of multiplied unit relay protection system and its synchronous method - Google Patents
A kind of multiplied unit relay protection system and its synchronous method Download PDFInfo
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- CN108008676A CN108008676A CN201711258435.6A CN201711258435A CN108008676A CN 108008676 A CN108008676 A CN 108008676A CN 201711258435 A CN201711258435 A CN 201711258435A CN 108008676 A CN108008676 A CN 108008676A
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Abstract
The invention discloses a kind of multiplied unit relay protection system and its synchronous method; using system of multiprocessing unit framework; the protection processing procedure of single protective relaying device is distributed in three processing units, is respectively front-end sampling processing unit, front end calculation processing unit and relay protective scheme processing unit.Do not introduce additional circuit; only by the closed-loop process process of sampling synchronization signals S/H signals; it is synchronous to realize that multiprocessor calculates; and realize more device samplings and calculate and mains frequency precise synchronization; high defencive function is required synchronization accuracy to realize; such as circuit longitudinal differential protection, there is provided a good technology platform.
Description
Technical field
The invention belongs to Relay Protection Technology in Power System field, be related to a kind of multiplied unit relay protection system and its
Synchronous method.
Background technology
With the popularization of intelligent grid, the requirement to protective relaying device data-handling capacity is higher and higher, in order to ensure
The rapidity and reliability of protective device, system of multiprocessing unit framework is commonly used, with share different data processings and
Protect calculating task.When carrying out protection calculating, it is desirable to it is responsible for synchronizing between multiple processing units of different computing tasks,
To ensure the synchronism of data consistency and data pipeline.Especially in circuit longitudinal differential protection occasion, it is desirable to distance tens
The synchronization that kilometer even two of more than up to a hundred kilometers or three table apparatus will be sampled and calculated, to system of multiprocessing unit
Multi-Machine Synchronous proposes the requirement of higher.
The content of the invention
It is one kind in relay the object of the present invention is to provide a kind of multiplied unit relay protection system and its synchronous method
Realize between multiplied unit or even the sampling of among devices and calculate synchronous on protective device system of multiprocessing unit framework
Method, solves the problems, such as synchronous difficult between multiplied unit existing in the prior art, remote more devices, realizes whole
The synchronization of data sampling and processing between each processor in different device, provides excellent for relay protection application in a system
Good platform base.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of multiplied unit relay protection system, including multiple protective relaying devices being in communication with each other, single relay are protected
Protection unit includes front-end sampling processing unit, front end calculation processing unit and relay protective scheme processing unit；
The front-end sampling processing unit, for the reception and resampling of S/H signals, and before sampling data transmitting is given
Hold computation processor；
The front end calculation processing unit, calculates for phasor and frequency, result of calculation is put into shared memory；
The relay protective scheme processing unit, for communicating with distal side protective relaying device, and from shared memory
Read phasor value；And generation system sampling synchronization signals S/H signals are calculated by proportion adjustment, send single to front-end sampling processing
Member and front end calculation processing unit, make its sampling and calculating cycle synchronous with S/H signals.
The front end calculation processing unit, is additionally operable to often receive a S/H signals interrupt signal of transmission to relay protective scheme
Processing unit；Relay protective scheme processing unit receives and reads phasor value from shared memory after interrupt signal.
The front end calculation processing unit, often receives a S/H signal and takes a sampling number from reception buffering area
According to often receiving NpassA sample point data carries out a phasor and frequency calculates；Wherein, Npass=N/n, per cycle sampling number
For N, the processor counting period is Tpass, each grid cyclic wave time is divided into Integer n Tpass, then each TpassProcessing
NpassA sample point data.
The relay protective scheme processing unit, for the difference of sample frequency and mains frequency and both sides to be sampled phase angle difference
Calculated in value input frequency and phase lock loop, export new S/H signal frequency values, constantly adjust the S/H sigtnal intervals, it is final to realize
Synchronization between protective relaying device, and S/H signal frequencies fnIt is infinitely close to mains frequency f.
A kind of synchronous method of multiplied unit relay protection system, for multiple protective relaying devices being in communication with each other
One, synchronous method comprises the following steps：
Presynchronization step, by synchronous with distal side protective relaying device, mains frequency, sends the S/H for triggering sampling
Signal, equally spaced N number of S/H signal pulses are sent per cycle；
Sampling step, carries out the reception and resampling of S/H signals；
Calculation procedure, carries out phasor and frequency calculates, and result of calculation is put into shared memory；
Logical process step, phasor value is read from shared memory, and calculates generation system sampling together by proportion adjustment
Walk signal S/H signals so that sampling and calculating cycle and S/H signal of the protective relaying device with distal side protective relaying device are same
Step.
As a further improvement on the present invention, in calculation procedure, S/H signals is often received and send an interrupt signal；Logic
In processing step, receive and read phasor value from shared memory after interrupt signal.
As a further improvement on the present invention, in calculation procedure, often receive a S/H signal and take one from reception buffering area
A sample point data, often receives NpassA sample point data carries out a phasor and frequency calculates；Wherein, Npass=N/n, weekly
Ripple sampling number is N, and the processor counting period is Tpass, each grid cyclic wave time is divided into Integer n Tpass, then each
TpassHandle NpassA sample point data.
As a further improvement on the present invention, in logical process step, by sample frequency and the difference of mains frequency and two
Calculated in the sampling phase angle difference input frequency and phase lock loop of side, export new S/H signal frequency values, constantly adjust S/H signals
Interval, finally realizes the synchronization between protective relaying device, and S/H signal frequencies fnIt is infinitely close to mains frequency f.
As a further improvement on the present invention, logical process step is specific as follows：
Phasor value is read from shared memory, while S/H signal pulses are sent, S/H signal pulses are counted,
And when carrying out table tennis pair by sending recorded count value mutually with distal side protective relaying device；By sample frequency and power grid frequency
The difference of rate and both sides sampling phase angle difference input frequency and phase lock loop carry out proportion adjustment calculating, export new sample frequency value
fn, and according to S/H signal frequencies, until two protective relaying devices count the integral multiple of difference N, two protective relaying device meters
Number sampling phase angle difference is approximately equal to 0, and S/H signal frequencies fnWith mains frequency f approximately equals, at this time PLL lock mutually succeed.
Compared with prior art, the present invention has the following advantages：
Synchronization system of the present invention is by two based on system of multiprocessing unit framework set of different physical locations or three sets
In the system of protective relaying device composition, carry out between device various places inside reason unit and synchrodata between device and device
Sampling and calculating processing, relay protective scheme processing unit communicate with distal side protective relaying device, and are read from shared memory
Phasor value, generation system sampling synchronization signals S/H signals are calculated by proportion adjustment, are sent to front-end sampling processing unit with before
Calculation processing unit is held, makes its sampling and calculating cycle synchronous with S/H signals.Additional circuit, Jin Jintong are not introduced in the system
The closed-loop process process of over-sampling synchronizing signal S/H signals, it is synchronous to realize that multiprocessor calculates, and realizes more device samplings and meter
Calculation and mains frequency precise synchronization, synchronization accuracy is required high defencive function, such as circuit longitudinal differential protection to realize, there is provided
One good technology platform.
The method of the present invention is made of presynchronization step, sampling step, calculation procedure and logical process step, passes through ratio
Regulating calculation generation system sampling synchronization signals S/H signals so that the protective relaying device is adopted with distal side protective relaying device
Sample and calculating cycle are synchronous with S/H signals, realize in whole system in different device each processor between data sampling
With the synchronization of processing；This method synchronous efficiency is high, synchronous accurate, ensure that data consistency and the synchronism of data pipeline.
Brief description of the drawings
Fig. 1 is a kind of multiplied unit relay protection system Organization Chart of the present invention；
Fig. 2 is synchronous method schematic diagram of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Typical multiplied unit relay protection system framework of the invention is as shown in Figure 1.Synchronous method principle such as Fig. 2 institutes
Show.
The multiplied unit protective relaying device synchronization system of the present invention, will be single using system of multiprocessing unit framework
The protection processing procedure of protective relaying device is distributed in three processing units, is respectively front-end sampling processing unit, front end meter
Calculate processing unit and relay protective scheme processing unit.
Front-end sampling processing unit is responsible for A/D data samplings in traditional relay protection device, is filled in intelligent relay protection
It is responsible for SV receptions and resampling in putting.Front end calculation processing unit is responsible for phasor calculation.Relay protective scheme processing unit is responsible for protection
Logical calculated and fault distinguishing, while be responsible for carrying out fiber optic communication with distal device.
Systematic sampling synchronizing signal S/H signals (SampleCount) are produced by relay protective scheme processing unit, are sent to front end
Sample processing unit and front end calculation processing unit, sampling and calculating cycle and S/H signal stringent synchronizations between each processing unit,
So as to fulfill the synchronization between processor.When relay protective scheme processing unit carries out table tennis pair with distal device based on S/H signal-counts,
It will be calculated in sample frequency and the difference of mains frequency and both sides sampling phase angle difference input in house software frequency and phase lock loop,
New S/H signal frequency values are exported, constantly adjust the S/H sigtnal intervals, the synchronization between final realization device, and S/H signal frequencies
fnIt is infinitely close to mains frequency f.
Whole system carries out per cycle fixed sample point sampling the ac signal of input, is N per cycle sampling number,
The processor counting period is Tpass, each grid cyclic wave time is divided into Integer n Tpass, then each TpassHandle NpassIt is a
Sample point data.
Such as set N=64, n=8, then Npass=N/n=64/8=8.
Relay protective scheme processing unit is sent for triggering by synchronous with distal protection Logical processing unit, mains frequency
The S/H signal pulses of sampling give front-end sampling processing unit, and equally spaced N number of S/H signal pulses are sent per cycle.
Front-end sampling processor receives S/H signals, carries out a data sampling at once, and give front end sampling data transmitting
Computation processor.
Front end computation processor often receives a S/H signal and takes a sample point data from reception buffering area, often receives
NpassA sample point data carries out a phasor and frequency calculates, and result of calculation is put into shared memory.Often receive N at the same timepass
A S/H signals send an interrupt signal and give relay protective scheme processor.
Relay protective scheme processing unit receives and reads phasor value from shared memory after interrupt signal.Relay protective scheme processing unit
While S/H pulses are sent, S/H signal pulses are counted, are SampleCount, and by being patrolled with offside protection
Volume processing unit sends mutually recorded SampleCount values when rattle pair.Relay protective scheme processing unit will sample frequency
Rate and the difference of mains frequency and both sides sampling phase angle difference input frequency and phase lock loop (PLL) carry out proportion adjustment calculating, output
New sample frequency value fn, and according to fnThe sampling interval is adjusted, i.e. S/H signal frequencies, until both sides SampleCount differences N's
Integral multiple, both sides sampling phase angle difference are approximately equal to 0, and S/H frequencies fnWith mains frequency f approximately equals, at this time PLL lock coordinate
Work(.fnCalculating adjustment cycle TsynI.e. the frequency and phase lock loop cycle of operation is traditionally arranged to be even number Tpass, table tennis pair when in
The transmitting-receiving cycle of SampleCount and phase measuring angle is also Tsyn, and relay protective scheme processing unit must be ensured in TsynCycle consolidates
Timing, which is carved, carries out sending and receiving for SampleCount, to ensure that communication port delay is symmetrical.
Fig. 2 show both sides device synchronization principles, and three side devices synchronously also can refer to the method, a table apparatus is arranged to
Host, at the same it is according to said method synchronous with other two table apparatus.
More than, it is only presently preferred embodiments of the present invention, is not limited only to the practical range of the present invention, it is all according to the scope of the invention
The equivalence changes done of content and modification, all should be the technology category of the present invention.
Claims (9)
1. a kind of multiplied unit relay protection system, it is characterised in that single including multiple protective relaying devices being in communication with each other
A protective relaying device includes front-end sampling processing unit, front end calculation processing unit and relay protective scheme processing unit；
The front-end sampling processing unit, front end meter is given for the reception and resampling of S/H signals, and sampling data transmitting
Calculate processor；
The front end calculation processing unit, calculates for phasor and frequency, result of calculation is put into shared memory；
The relay protective scheme processing unit, reads for communicating with distal side protective relaying device, and from shared memory
Phasor value；And generation system sampling synchronization signals S/H signals are calculated by proportion adjustment, send to front-end sampling processing unit and
Front end calculation processing unit, makes its sampling and calculating cycle synchronous with S/H signals.
A kind of 2. multiplied unit relay protection system according to claims 1, it is characterised in that the front end meter
Processing unit is calculated, is additionally operable to often to receive S/H signals and sends an interrupt signal and give relay protective scheme processing unit；Relay protective scheme processing
Unit receives and reads phasor value from shared memory after interrupt signal.
3. a kind of multiplied unit relay protection system according to claim 1, it is characterised in that the front end calculates
Processing unit, often receives a S/H signal and takes a sample point data from reception buffering area, often receive NpassA sampling number
Calculated according to phasor of progress and frequency；Wherein, Npass=N/n, is N per cycle sampling number, the processor counting period is
Tpass, each grid cyclic wave time is divided into Integer n Tpass, then each TpassHandle NpassA sample point data.
4. a kind of multiplied unit relay protection system according to claims 1, it is characterised in that the protection is patrolled
Volume processing unit, for by the difference of sample frequency and mains frequency and both sides sampling phase angle difference input frequency and phase lock loop into
Row calculates, and exports new S/H signal frequency values, constantly adjusts the S/H sigtnal intervals, finally realizes same between protective relaying device
Step, and S/H signal frequencies fnIt is infinitely close to mains frequency f.
5. a kind of synchronous method of multiplied unit relay protection system, it is characterised in that for multiple relays being in communication with each other
One of protective device, synchronous method comprises the following steps：
Presynchronization step, by synchronous with distal side protective relaying device, mains frequency, sends the S/H signals for triggering sampling,
Equally spaced N number of S/H signal pulses are sent per cycle；
Sampling step, carries out the reception and resampling of S/H signals；
Calculation procedure, carries out phasor and frequency calculates, and result of calculation is put into shared memory；
Logical process step, phasor value is read from shared memory, and is calculated generation system sample-synchronous by proportion adjustment and believed
Number S/H signals so that sampling and calculating cycle of the protective relaying device with distal side protective relaying device are synchronous with S/H signals.
6. the synchronous method of a kind of multiplied unit relay protection system according to claim 5, it is characterised in that calculate
In step, often receive S/H signals and send an interrupt signal；In logical process step, receive after interrupt signal from shared storage
Read phasor value in area.
7. the synchronous method of a kind of multiplied unit relay protection system according to claim 5, it is characterised in that calculate
In step, often receive a S/H signal and take a sample point data from reception buffering area, often receive NpassA sample point data
Carry out a phasor and frequency calculates；Wherein, Npass=N/n, is N per cycle sampling number, the processor counting period is Tpass,
Each grid cyclic wave time is divided into Integer n Tpass, then each TpassHandle NpassA sample point data.
A kind of 8. synchronous method of multiplied unit relay protection system according to claim 5, it is characterised in that logic
In processing step, it will be counted in sample frequency and the difference of mains frequency and both sides sampling phase angle difference input frequency and phase lock loop
Calculate, export new S/H signal frequency values, constantly adjust the S/H sigtnal intervals, finally realize the synchronization between protective relaying device, and
S/H signal frequencies fnIt is infinitely close to mains frequency f.
A kind of 9. synchronous method of multiplied unit relay protection system according to claim 5, it is characterised in that logic
Processing step is specific as follows：
From shared memory read phasor value, while S/H pulses are sent, S/H pulses are counted, and by with distal side
When the recorded count value of the mutual transmission of protective relaying device carries out table tennis pair；By sample frequency and the difference of mains frequency and two
Side sampling phase angle difference input frequency and phase lock loop carries out proportion adjustment calculating, exports new sample frequency value fn, and believed according to S/H
Number frequency, until two protective relaying devices count the integral multiple of difference N, two protective relaying devices sampling phase angle difference approximations etc.
In 0, and S/H frequencies fnWith mains frequency f approximately equals, at this time PLL lock mutually succeed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711258435.6A CN108008676B (en) | 2017-11-29 | 2017-11-29 | Multi-processing unit relay protection system and synchronization method thereof |
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| CN201711258435.6A CN108008676B (en) | 2017-11-29 | 2017-11-29 | Multi-processing unit relay protection system and synchronization method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666990A (en) * | 2018-06-07 | 2018-10-16 | 广东科瑞德电气科技有限公司 | A kind of power grid differential protecting method and system |
| CN109725197A (en) * | 2018-12-25 | 2019-05-07 | 西电通用电气自动化有限公司 | A kind of multiplied unit relay protection system frequency tracking method and system |
| CN114126028A (en) * | 2020-08-28 | 2022-03-01 | 宸芯科技有限公司 | Differential protection method, device, communication unit and storage medium |
-
2017
- 2017-11-29 CN CN201711258435.6A patent/CN108008676B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666990A (en) * | 2018-06-07 | 2018-10-16 | 广东科瑞德电气科技有限公司 | A kind of power grid differential protecting method and system |
| CN108666990B (en) * | 2018-06-07 | 2020-03-31 | 广东科瑞德电气科技有限公司 | Power grid differential protection method and system |
| CN109725197A (en) * | 2018-12-25 | 2019-05-07 | 西电通用电气自动化有限公司 | A kind of multiplied unit relay protection system frequency tracking method and system |
| CN114126028A (en) * | 2020-08-28 | 2022-03-01 | 宸芯科技有限公司 | Differential protection method, device, communication unit and storage medium |
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| CN108008676B (en) | 2020-04-21 |
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