CN109616998A - The inconsistent differentiation processing method of protective relaying device voltage based on dual processors sampling - Google Patents
The inconsistent differentiation processing method of protective relaying device voltage based on dual processors sampling Download PDFInfo
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- CN109616998A CN109616998A CN201811568014.8A CN201811568014A CN109616998A CN 109616998 A CN109616998 A CN 109616998A CN 201811568014 A CN201811568014 A CN 201811568014A CN 109616998 A CN109616998 A CN 109616998A
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- voltage
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- sampling
- dual processors
- protective relaying
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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
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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Abstract
The present invention discloses the inconsistent differentiation processing method of the protective relaying device voltage based on dual processors sampling, which includes the following steps: whether protective relaying device starts discriminating step；Digitized sampling device enters the inconsistent discriminating step of dual processors voltage sample；Digitized sampling device first carries out the whether wrong mark discriminating step of master-slave cpu voltage sample, rear to carry out the inconsistent discriminating step of dual processors voltage sample；The inconsistent post-processing logic step of dual processors voltage sample.The present invention is directed to the data resource for how making full use of principal and subordinate's dual processors to sample; when there is voltage sample exception when host CPU sampling to solve to be used only; the technical issues of protection that may result in unreliable movement; it takes full advantage of from CPU voltage sample information; avoiding host CPU voltage sample extremely causes voltage correlation protection act element to malfunction, to improve the reliability of protective relaying device.
Description
Technical field
The present invention relates to a kind of differentiation processing methods that the protective relaying device voltage based on dual processors sampling is inconsistent, belong to
In Relay Protection Technology in Power System field.
Background technique
Protective relaying device is the important component of electric system, is the important measures for protecting safe operation of power system
One of.With the development of protective relaying device, and to the raising that grid stability requires, high-voltage relay protective device is most at present
Using principal and subordinate's dual processors mode, master-slave cpu samples to increase the reliability of sampling simultaneously, after preventing single CPU sampling from ging wrong, dress
It sets and the phenomenon that malfunction occurs.Be currently based on the typical way of the protective relaying device of dual processors: ac analog then introduces respectively
AD module in two CPU is converted by independent data sampling circuit respectively, wherein the number of the AD module in protection CPU
According to protection is given, defencive function is completed, starts starting-up later time of the AD module in CPU in a manner of " logical AND " with protection CPU
Constitute the open loop of starting relay.Only two pieces of AD start simultaneously, and protection could export.This way is simple and convenient, but
The data resource for not making full use of dual processors to sample easily causes protection misoperation when host CPU appearance sampling exception.A kind of feelings
Condition is: when host CPU voltage sample exception, but protective device voltage alarm or latch-up protection condition is unsatisfactory for, if occurring at this time
System disturbance is possible to will lead to the malfunction of certain voltage correlation protection element after device starting.
Summary of the invention
The technical problems to be solved by the present invention are: the data resource for how making full use of principal and subordinate's dual processors to sample, to solve
When occurring voltage sample exception when sampling using only host CPU, the problem of the protection that may result in unreliable movement.Of the invention
Purpose is, such similar situation is avoided to occur, and the sampled data that two-way should be used different by protective relaying device works as principal and subordinate
When CPU sampling is inconsistent, protective relaying device should be alerted and be taken measures, and reasonably retain or exit relevant defencive function,
Protection misoperation is prevented, the reliability of protective relaying device is improved.
The inconsistent differentiation of the protective relaying device voltage that the present invention to solve the above problems, provide is sampled based on dual processors
Processing method, the differentiation processing method include the following steps:
Whether protective relaying device starts discriminating step；
Non-digitalization sampling apparatus enters the inconsistent discriminating step of dual processors voltage sample；
Digitized sampling device first carries out the whether wrong mark discriminating step of master-slave cpu voltage sample, carries out dual processors afterwards
The inconsistent discriminating step of voltage sample；
The inconsistent post-processing logic step of dual processors voltage sample.
As a kind of preferred embodiment, whether the protective relaying device, which starts discriminating step, is specifically included: judge after
Whether electrical protective device starts, if protective relaying device start, enter protection act logic, protective relaying device starting in not
Judge whether dual processors voltage sample is consistent again, otherwise carries out whether protective relaying device is that digitized sampling device differentiates.
As a kind of preferred embodiment, the non-digitalization sampling apparatus enters the inconsistent differentiation of dual processors voltage sample
Step specifically includes: if protective relaying device does not start, being directly entered dual processors voltage for non-digitalization sampling apparatus and adopts
The inconsistent discriminating step of sample.
As a kind of preferred embodiment, the inconsistent discriminating step of digitized sampling device voltage sample is specifically wrapped
It includes: if protective relaying device does not start, needing to judge whether master-slave cpu voltage sample is wrong for digitized sampling device
Accidentally indicate, if the equal inerrancy mark of master-slave cpu voltage sample, enters the inconsistent differentiation process of dual processors voltage sample, it is otherwise defeated
Sample error alerts out.
As a kind of preferred embodiment, the whether wrong mark discriminating step of master-slave cpu voltage sample is specifically wrapped
Include: master-slave cpu sampled data is invalid；Sampling channel interrupts；Sampling channel step-out；Voltage sample maintenance is inconsistent；Above 4 items
Part meets one of them, then sets error flag.
As a kind of preferred embodiment, the inconsistent discriminating step of dual processors voltage sample includes: that host CPU passes through height
Fast bus is obtained from CPU voltage sample value, calculates separately host CPU and the sampled voltage fundamental wave vector value from CPU, then judgement master
Whether the modulus value of CPU and the voltage vector difference from CPU is greater than the threshold threshold value of setting, is greater than if being judged as, is delayed 5 seconds and differentiates
Dual processors voltage sample is inconsistent.
As a kind of preferred embodiment, the inconsistent discriminating step of dual processors voltage sample is specifically included:
Calculate separately host CPU and the three-phase sampled voltage fundamental wave vector value from CPU；
It calculates separately host CPU and whether each phase voltage phasor difference modulus value from CPU is greater than setting threshold value, specific discriminate
It is as follows:
{|Ua-UaQ| > Max (0.1Un,Ua/4,UaQ/4)}||
{|Ub-UbQ| > Max (0.1Un,Ub/4,UbQ/4)}||
{|Uc-UcQ| > Max (0.1Un,Uc/4,UcQ/4)}
Wherein, Ua、UaQRespectively host CPU sampling, from CPU sample A phase voltage vector value, Ub、UbQRespectively host CPU is adopted
Sample, the B phase voltage vector value sampled from CPU, Uc、UcQRespectively host CPU sampling, from CPU sample C phase voltage vector value, Un
For voltage rating.
As a kind of preferred embodiment, the inconsistent post-processing logic of dual processors voltage sample is as follows: dual processors voltage
After sampling inconsistent criterion satisfaction, be delayed 5s, and protective relaying device issues related warning information, while protective relaying device
By PT broken string logical process, it is latched protection element relevant to voltage, relay is returned after the 1s that is then delayed if the conditions are not met and protects
Whether protection unit starts discriminating step.
Advantageous effects of the invention: first, the present invention is directed to the data for how making full use of principal and subordinate's dual processors to sample
Resource, when there is voltage sample exception when host CPU sampling to solve to be used only, the skill for the unreliable movement of protection that may result in
Art problem, by sampling protective relaying device based on dual processors, under the premise of protective relaying device is inactive, host CPU passes through height
Fast bus is obtained from CPU voltage sample value, master and slave CPU sampled voltage fundamental wave vector value is calculated separately, then according to master-slave cpu
The phasor difference of sample voltage data differentiates the consistency of dual processors voltage sample data, if dual processors voltage sample is inconsistent,
It issues corresponding alarm and presses PT broken string logical process, be latched protection element relevant to voltage, digitized sampling is filled
It sets, first determines whether sampled data is effective, prevents invalid data from judging by accident under conditions of meeting inconsistent criterion and influences to protect
Protect logic；Second, the present invention takes full advantage of from CPU voltage sample information, and avoiding host CPU voltage sample extremely leads to voltage phase
The malfunction of protection act element is closed, to improve the reliability of protective relaying device.
Detailed description of the invention
Fig. 1 is the whole of the inconsistent differentiation processing method of the protective relaying device voltage of the invention based on dual processors sampling
Body flow chart.
Fig. 2 is the flow chart of the inconsistent discriminating step of dual processors voltage sample of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Fig. 1 the inconsistent differentiation processing of the protective relaying device voltage of the invention based on dual processors sampling
The overall flow figure of the method differentiation processing method inconsistent based on the protective relaying device voltage that dual processors sample, at the differentiation
Reason method includes following four steps.
Step SS1: whether protective relaying device starts discriminating step；Whether the protective relaying device starts discriminating step
It specifically includes: judging whether protective relaying device starts, if protective relaying device starts, enter protection act logic, relay
No longer judge whether dual processors voltage sample is consistent in protective device starting, otherwise carries out whether protective relaying device is digitlization
Sampling apparatus differentiates.
Step SS2: non-digitalization sampling apparatus enters the inconsistent discriminating step of dual processors voltage sample；The non-digitalization
Sampling apparatus enters the inconsistent discriminating step of dual processors voltage sample and specifically includes: if protective relaying device does not start, for non-
Digitized sampling device is then directly entered the inconsistent discriminating step of dual processors voltage sample.
Step SS3: digitized sampling device first carries out the whether wrong mark discriminating step of master-slave cpu voltage sample, after
Carry out the inconsistent discriminating step of dual processors voltage sample.
As a kind of preferred embodiment, the inconsistent discriminating step of digitized sampling device voltage sample is specifically wrapped
It includes: if protective relaying device does not start, needing to judge whether master-slave cpu voltage sample is wrong for digitized sampling device
Accidentally indicate, if the equal inerrancy mark of master-slave cpu voltage sample, enters the inconsistent differentiation process of dual processors voltage sample, it is otherwise defeated
Sample error alerts out.
As a kind of preferred embodiment, the whether wrong mark discriminating step of master-slave cpu voltage sample is specifically wrapped
Include: master-slave cpu sampled data is invalid；Sampling channel interrupts；Sampling channel step-out；Voltage sample maintenance is inconsistent；Above 4 items
Part meets one of them, then sets error flag.
As a kind of preferred embodiment, the inconsistent discriminating step of dual processors voltage sample includes: that host CPU passes through height
Fast bus is obtained from CPU voltage sample value, calculates separately host CPU and the sampled voltage fundamental wave vector value from CPU, then judgement master
Whether the modulus value of CPU and the voltage vector difference from CPU is greater than the threshold threshold value of setting, is greater than if being judged as, is delayed 5 seconds and differentiates
Dual processors voltage sample is inconsistent.
As shown in Fig. 2 the flow chart of the inconsistent discriminating step of dual processors voltage sample of the invention, as a kind of preferable
Embodiment, the inconsistent discriminating step of dual processors voltage sample specifically includes:
Calculate separately host CPU and the three-phase sampled voltage fundamental wave vector value from CPU；
It calculates separately host CPU and whether each phase voltage phasor difference modulus value from CPU is greater than setting threshold value, specific discriminate
It is as follows:
{|Ua-UaQ| > Max (0.1Un,Ua/4,UaQ/4)}||
{|Ub-UbQ| > Max (0.1Un,Ub/4,UbQ/4)}||
{|Uc-UcQ| > Max (0.1Un,Uc/4,UcQ/4)}
Wherein, Ua、UaQRespectively host CPU sampling, from CPU sample A phase voltage vector value, Ub、UbQRespectively host CPU is adopted
Sample, the B phase voltage vector value sampled from CPU, Uc、UcQRespectively host CPU sampling, from CPU sample C phase voltage vector value, Un
For voltage rating.
Step SS4: the inconsistent post-processing logic step of dual processors voltage sample.It is described double as a kind of preferred embodiment
The inconsistent post-processing logic of CPU voltage sample is as follows: after the inconsistent criterion of dual processors voltage sample meets, be delayed 5s, relay
Protective device issues related warning information, while protective relaying device is latched relevant to voltage by PT broken string logical process
Protection element, is then delayed 1 if the conditions are not metsReturn to whether protective relaying device starts discriminating step afterwards.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. the inconsistent differentiation processing method of the protective relaying device voltage based on dual processors sampling, which is characterized in that the differentiation
Processing method includes the following steps:
Whether protective relaying device starts discriminating step；
Non-digitalization sampling apparatus enters the inconsistent discriminating step of dual processors voltage sample；
Digitized sampling device first carries out the whether wrong mark discriminating step of master-slave cpu voltage sample, rear to carry out dual processors voltage
Sample inconsistent discriminating step；
The inconsistent post-processing logic step of dual processors voltage sample.
2. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is specifically included it is characterized in that, whether the protective relaying device starts discriminating step: judging whether protective relaying device starts,
If protective relaying device starts, enters protection act logic, no longer judge dual processors voltage sample in protective relaying device starting
It is whether consistent, otherwise carry out whether protective relaying device is that digitized sampling device differentiates.
3. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is specifically included it is characterized in that, the non-digitalization sampling apparatus enters the inconsistent discriminating step of dual processors voltage sample: if relay
Protective device does not start, and is then directly entered the inconsistent discriminating step of dual processors voltage sample for non-digitalization sampling apparatus.
4. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is characterized in that, the inconsistent discriminating step of digitized sampling device voltage sample specifically includes: if protective relaying device does not have
There is starting, then needs to judge the whether wrong mark of master-slave cpu voltage sample for digitized sampling device, if master-slave cpu is electric
Pressure samples equal inerrancy mark, then enters the inconsistent differentiation process of dual processors voltage sample, otherwise exports sample error alarm.
5. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is characterized in that, the whether wrong mark discriminating step of master-slave cpu voltage sample specifically includes: master-slave cpu sampled data
In vain；Sampling channel interrupts；Sampling channel step-out；Voltage sample maintenance is inconsistent；Above 4 conditions meet one of them, then
Set error flag.
6. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is characterized in that, the inconsistent discriminating step of dual processors voltage sample includes: that host CPU is obtained by high-speed bus from CPU voltage
Sampled value calculates separately host CPU and the sampled voltage fundamental wave vector value from CPU, then judges host CPU and swears from the voltage of CPU
Whether the modulus value of amount difference is greater than the threshold threshold value of setting, is greater than if being judged as, 5 seconds differentiation dual processors voltage samples of delay are different
It causes.
7. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 6 based on dual processors sampling,
It is characterized in that, the inconsistent discriminating step of dual processors voltage sample specifically includes:
Calculate separately host CPU and the three-phase sampled voltage fundamental wave vector value from CPU；
It calculates separately host CPU and whether each phase voltage phasor difference modulus value from CPU is greater than setting threshold value, specific discriminate is such as
Under:
{|Ua-UaQ| > Max (0.1Un,Ua/4,UaQ/4)}||
{|Ub-UbQ| > Max (0.1Un,Ub/4,UbQ/4)}||
{|Uc-UcQ| > Max (0.1Un,Uc/4,UcQ/4)}
Wherein, Ua、UaQRespectively host CPU sampling, from CPU sample A phase voltage vector value, Ub、UbQRespectively host CPU sampling,
The B phase voltage vector value sampled from CPU, Uc、UcQRespectively host CPU sampling, from CPU sample C phase voltage vector value, UnFor volume
Constant voltage.
8. the inconsistent differentiation processing method of the protective relaying device voltage according to claim 1 based on dual processors sampling,
It is characterized in that, the inconsistent post-processing logic of dual processors voltage sample is as follows: the inconsistent criterion of dual processors voltage sample
After satisfaction, be delayed 5s, and protective relaying device issues related warning information, while protective relaying device presses PT broken string logical process,
It is latched protection element relevant to voltage, returns to whether protective relaying device starts differentiation after the 1s that is then delayed if the conditions are not met
Step.
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