CN109254216A - A kind of AD method of calibration and system for measuring and controlling protective device - Google Patents
A kind of AD method of calibration and system for measuring and controlling protective device Download PDFInfo
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- CN109254216A CN109254216A CN201811318573.3A CN201811318573A CN109254216A CN 109254216 A CN109254216 A CN 109254216A CN 201811318573 A CN201811318573 A CN 201811318573A CN 109254216 A CN109254216 A CN 109254216A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of AD methods of calibration and system for measuring and controlling protective device; belong to Relay Protection Technology in Power System field; by the protective number and corresponding observing and controlling amount data comparison to measuring and controlling protective device, and the data comparison with external zero sequence, the detection in analog acquisition circuit is carried out；It is characterized by: including at least following steps: step 1: virtual value calculates；Step 2: Sudden Changing Rate calculates；The Sudden Changing Rate is the absolute value of the difference of analog quantity the currently active value and two weeks wavefront virtual values；Step 3: analog quantity mutation judgement；The analog quantity sports corresponding Sudden Changing Rate and is greater than the Sudden Changing Rate threshold value being arranged for it；Step 4: AD judges extremely.The present invention can analog acquisition circuit real-time detection to measuring and controlling protective device, detection range can be extended to the circuit CT outside measuring and controlling protective device, improves the reliability of relay protected operation.
Description
Technical field
The invention belongs to Relay Protection Technology in Power System field more particularly to a kind of schools AD for measuring and controlling protective device
Test method and system.
Background technique
Protective device hardware components carry the basis of relay protection, its safe and stable operation is to realize that relay protection can
By the basic demand of property.The operation conditions of real-time detection protective device hardware components, and processing in time in abnormal cases, are true
Protect the requisite measure of protective device safe and stable operation.Analog acquisition circuit be protective device hardware chief component it
One, AD (abbreviation of Analog-to-Digital refers to the conversion of analog quantity to digital quantity, i.e. analog-to-digital conversion) are its core devices
Part, for the measuring and controlling protective device using double AD redundant configurations, two sets of AD can be verified each other, but higher cost；For unparalleled
The measuring and controlling protective device of AD redundant configuration, often without the detection for analog acquisition circuit, it is therefore necessary to introduce one kind
AD method of calibration and system for measuring and controlling protective device.
Summary of the invention
In view of the problems of the existing technology, for the measuring and controlling protective device of unparalleled AD redundant configuration, in order to realize to mould
The detection of analog quantity acquisition circuit, to improve the reliability of relay protected operation, the invention proposes one kind to fill for monitoring and protection
The AD method of calibration and system set.
One of the objects of the present invention is to provide a kind of AD methods of calibration for measuring and controlling protective device, by protecting to observing and controlling
The protective number of protection unit and corresponding observing and controlling amount data comparison, and the data comparison with external zero sequence carry out analog acquisition
The detection in circuit；Including at least following steps:
Step 1: virtual value calculates；
Step 2: Sudden Changing Rate calculates；The Sudden Changing Rate is the difference of the currently active value of analog quantity and two weeks wavefront virtual values
Absolute value；
Step 3: analog quantity mutation judgement；The analog quantity sports corresponding Sudden Changing Rate and is greater than the Sudden Changing Rate being arranged for it
Threshold value；
Step 4: AD judges extremely；Specifically:
When certain phase protective current and observing and controlling electric current have and only one is mutated, then the phase current is abnormal, and otherwise determining should
Phase current is normal；
When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, then the phase voltage is abnormal, and otherwise determining should
Phase voltage is normal；
When three-phase current is normal, if zero-sequence current is mutated, zero-sequence current is abnormal, is otherwise determining zero-sequence current just
Often；
When three-phase voltage is normal, if residual voltage is mutated, residual voltage is abnormal, is otherwise determining residual voltage just
Often；
It is set when the ratio of the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value is greater than for it
When the threshold value set, then the phase current is abnormal, otherwise determines that the phase current is normal；When certain mutually protects voltage and observing and controlling voltage effective
When the absolute value of the difference of value and the ratio of sum of the two are greater than the threshold value for its setting, then the phase voltage is abnormal, otherwise determines
The phase voltage is normal；
When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, then AD is abnormal, needs to be latched phase
Close protection.
The second object of the present invention is to provide a kind of system of AD method of calibration for measuring and controlling protective device, by right
The protective number of measuring and controlling protective device and corresponding observing and controlling amount data comparison, and the data comparison with external zero sequence, are simulated
Measure the detection of acquisition circuit；It includes at least:
Virtual value computing module: virtual value calculates；
Sudden Changing Rate computing module: Sudden Changing Rate calculates；The Sudden Changing Rate is that the currently active value of analog quantity is effective with two weeks wavefront
The absolute value of the difference of value；
Analog quantity is mutated judgment module: analog quantity mutation judgement；The analog quantity sports corresponding Sudden Changing Rate and is greater than for it
The Sudden Changing Rate threshold value of setting；
AD exception judgment module: AD judges extremely；Specifically:
When certain phase protective current and observing and controlling electric current have and only one is mutated, then the phase current is abnormal, and otherwise determining should
Phase current is normal；
When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, then the phase voltage is abnormal, and otherwise determining should
Phase voltage is normal；
When three-phase current is normal, if zero-sequence current is mutated, zero-sequence current is abnormal, is otherwise determining zero-sequence current just
Often；
When three-phase voltage is normal, if residual voltage is mutated, residual voltage is abnormal, is otherwise determining residual voltage just
Often；
It is set when the ratio of the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value is greater than for it
When the threshold value set, then the phase current is abnormal, otherwise determines that the phase current is normal；When certain mutually protects voltage and observing and controlling voltage effective
When the absolute value of the difference of value and the ratio of sum of the two are greater than the threshold value for its setting, then the phase voltage is abnormal, otherwise determines
The phase voltage is normal；
When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, then AD is abnormal, needs to be latched phase
Close protection.
The third object of the present invention is to provide a kind of computer for realizing the AD method of calibration for measuring and controlling protective device
Program.
The fourth object of the present invention is to provide a kind of Information Number for realizing the AD method of calibration for measuring and controlling protective device
According to processing terminal.
The fifth object of the present invention is to provide a kind of computer readable storage medium, including instruction, when it is in computer
When upper operation, so that computer executes the AD method of calibration for being used for measuring and controlling protective device.
In conclusion advantages of the present invention and good effect are as follows:
The present invention can analog acquisition circuit real-time detection to measuring and controlling protective device, detection range can be extended to observing and controlling
The circuit CT, improves the reliability of relay protected operation outside protective device.It, can because the technical solution is not necessarily to double AD redundant configurations
Hardware is saved, and then reduces the failure rate of hardware.
Detailed description of the invention
Fig. 1 is the flow chart of the preferred embodiment of the present invention；
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Referring to Fig. 1, a kind of AD method of calibration for measuring and controlling protective device, by measuring and controlling protective device protective number and
The data comparison of corresponding observing and controlling amount, and the data comparison with external zero sequence, to carry out the detection in analog acquisition circuit, including
Following steps:
Step 1: virtual value calculates.General protective current is derived from protection CT, and zero-sequence current is derived from zero sequence CT, and observing and controlling electric current takes
Measurement CT, using fourier algorithm calculate separately protective current, zero-sequence current and observing and controlling electric current respectively electric current reality imaginary part and effectively
Value；General voltage is derived from bus or bus PT, protection voltage and observing and controlling voltage is divided into measuring and controlling protective device, using fourier
Algorithm calculates separately protection voltage, residual voltage and observing and controlling voltage respectively voltage reality imaginary part and virtual value；
Step 2: Sudden Changing Rate calculates.The Sudden Changing Rate is the exhausted of the difference of the currently active value of analog quantity and two weeks wavefront virtual values
To value, including protective current Sudden Changing Rate, observing and controlling jump-value of current and zero-sequence current Sudden Changing Rate, including protection voltage jump amount, survey
Control voltage jump amount and residual voltage Sudden Changing Rate；
Step 3: analog quantity mutation judgement.Judge whether protective current, observing and controlling electric current and zero-sequence current are mutated respectively, respectively
Judge to protect whether voltage, observing and controlling voltage and residual voltage are mutated；The analog quantity mutation refers to that corresponding Sudden Changing Rate is greater than and sets for it
The Sudden Changing Rate threshold value set；
Step 4:AD judges extremely；It is specifically divided into Sudden Changing Rate diagnostic method and two kinds of virtual value comparison method, wherein Sudden Changing Rate is sentenced
Other method are as follows: when certain phase protective current and observing and controlling electric current have and only one is mutated, determine phase current exception, otherwise determining should
Phase current is normal；When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, determines phase voltage exception, otherwise sentence
The fixed phase voltage is normal；When three-phase current is normal, if zero-sequence current is mutated, determines that zero-sequence current is abnormal, otherwise determine zero
Sequence electric current is normal；When three-phase voltage is normal, if residual voltage is mutated, determines that residual voltage is abnormal, otherwise determine zero sequence electricity
Positive pressure is normal.When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, i.e. judgement AD is abnormal, needs to be latched
Correlation protection.
Virtual value comparison method are as follows: i.e. when the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value
Ratio be greater than for its setting threshold value when, determine the phase current exception, otherwise determine that the phase current is normal.When certain is mutually protected
When the threshold value that the ratio of the absolute value of the difference and sum of the two of voltage and observing and controlling voltage effective value is greater than for its setting, determining should
Phase voltage is abnormal, otherwise determines that the phase voltage is normal.Above-mentioned Sudden Changing Rate diagnostic method and virtual value comparison method can be used alone, and also may be used
It is applied in combination.
Preferred embodiment two, a kind of system of the AD method of calibration for measuring and controlling protective device, by being filled to monitoring and protection
The data comparison of protective number and corresponding observing and controlling amount, and the data comparison with external zero sequence are set, to carry out analog acquisition circuit
Detection, comprising:
Virtual value computing module: virtual value calculates.General protective current is derived from protection CT, and zero-sequence current is derived from zero sequence CT,
Observing and controlling electric current is derived from measurement CT, and calculating separately protective current, zero-sequence current and observing and controlling electric current using fourier algorithm, respectively electric current is real
Imaginary part and virtual value；General voltage is derived from bus or bus PT, and protection voltage and observing and controlling electricity are divided into measuring and controlling protective device
Pressure calculates separately protection voltage, residual voltage and observing and controlling voltage respectively voltage reality imaginary part and virtual value using fourier algorithm；
Sudden Changing Rate computing module: Sudden Changing Rate calculates.The Sudden Changing Rate is that the currently active value of analog quantity is effective with two weeks wavefront
The absolute value of the difference of value, including protective current Sudden Changing Rate, observing and controlling jump-value of current and zero-sequence current Sudden Changing Rate, including protection voltage
Sudden Changing Rate, observing and controlling voltage jump amount and residual voltage Sudden Changing Rate；
Analog quantity is mutated judgment module: analog quantity mutation judgement.Protective current, observing and controlling electric current and zero-sequence current are judged respectively
Whether it is mutated, judges to protect whether voltage, observing and controlling voltage and residual voltage are mutated respectively；The analog quantity mutation refers to corresponding mutation
The Sudden Changing Rate threshold value that amount is greater than for its setting；
AD exception judgment module: AD judges extremely；It is specifically divided into Sudden Changing Rate diagnostic method and two kinds of virtual value comparison method,
In, Sudden Changing Rate diagnostic method are as follows: when certain phase protective current and observing and controlling electric current have and only one is mutated, determine that the phase current is different
Often, otherwise determine that the phase current is normal；When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, phase electricity is determined
Reduce off-flavor is normal, otherwise determines that the phase voltage is normal；When three-phase current is normal, if zero-sequence current is mutated, determine that zero-sequence current is different
Often, otherwise determine that zero-sequence current is normal；When three-phase voltage is normal, if residual voltage is mutated, determine that residual voltage is abnormal, it is no
Then determine that residual voltage is normal.When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, i.e. judgement AD
It is abnormal, need to be latched related protection.
Virtual value comparison method are as follows: i.e. when the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value
Ratio be greater than for its setting threshold value when, determine the phase current exception, otherwise determine that the phase current is normal.When certain is mutually protected
When the threshold value that the ratio of the absolute value of the difference and sum of the two of voltage and observing and controlling voltage effective value is greater than for its setting, determining should
Phase voltage is abnormal, otherwise determines that the phase voltage is normal.Above-mentioned Sudden Changing Rate diagnostic method and virtual value comparison method can be used alone, and also may be used
It is applied in combination.
Preferred embodiment three, a kind of computer program for realizing the AD method of calibration for measuring and controlling protective device, the use
Include the following steps: in the AD method of calibration of measuring and controlling protective device
Step 1: virtual value calculates.General protective current is derived from protection CT, and zero-sequence current is derived from zero sequence CT, and observing and controlling electric current takes
Measurement CT, using fourier algorithm calculate separately protective current, zero-sequence current and observing and controlling electric current respectively electric current reality imaginary part and effectively
Value；General voltage is derived from bus or bus PT, protection voltage and observing and controlling voltage is divided into measuring and controlling protective device, using fourier
Algorithm calculates separately protection voltage, residual voltage and observing and controlling voltage respectively voltage reality imaginary part and virtual value；
Step 2: Sudden Changing Rate calculates.The Sudden Changing Rate is the exhausted of the difference of the currently active value of analog quantity and two weeks wavefront virtual values
To value, including protective current Sudden Changing Rate, observing and controlling jump-value of current and zero-sequence current Sudden Changing Rate, including protection voltage jump amount, survey
Control voltage jump amount and residual voltage Sudden Changing Rate；
Step 3: analog quantity mutation judgement.Judge whether protective current, observing and controlling electric current and zero-sequence current are mutated respectively, respectively
Judge to protect whether voltage, observing and controlling voltage and residual voltage are mutated；The analog quantity mutation refers to that corresponding Sudden Changing Rate is greater than and sets for it
The Sudden Changing Rate threshold value set；
Step 4:AD judges extremely；It is specifically divided into Sudden Changing Rate diagnostic method and two kinds of virtual value comparison method, wherein Sudden Changing Rate is sentenced
Other method are as follows: when certain phase protective current and observing and controlling electric current have and only one is mutated, determine phase current exception, otherwise determining should
Phase current is normal；When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, determines phase voltage exception, otherwise sentence
The fixed phase voltage is normal；When three-phase current is normal, if zero-sequence current is mutated, determines that zero-sequence current is abnormal, otherwise determine zero
Sequence electric current is normal；When three-phase voltage is normal, if residual voltage is mutated, determines that residual voltage is abnormal, otherwise determine zero sequence electricity
Positive pressure is normal.When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, i.e. judgement AD is abnormal, needs to be latched
Correlation protection.
Virtual value comparison method are as follows: i.e. when the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value
Ratio be greater than for its setting threshold value when, determine the phase current exception, otherwise determine that the phase current is normal.When certain is mutually protected
When the threshold value that the ratio of the absolute value of the difference and sum of the two of voltage and observing and controlling voltage effective value is greater than for its setting, determining should
Phase voltage is abnormal, otherwise determines that the phase voltage is normal.Above-mentioned Sudden Changing Rate diagnostic method and virtual value comparison method can be used alone, and also may be used
It is applied in combination.
Preferred embodiment four, a kind of information data processing terminal for realizing the AD method of calibration for measuring and controlling protective device.
The AD method of calibration for measuring and controlling protective device includes the following steps:
Step 1: virtual value calculates.General protective current is derived from protection CT, and zero-sequence current is derived from zero sequence CT, and observing and controlling electric current takes
Measurement CT, using fourier algorithm calculate separately protective current, zero-sequence current and observing and controlling electric current respectively electric current reality imaginary part and effectively
Value；General voltage is derived from bus or bus PT, protection voltage and observing and controlling voltage is divided into measuring and controlling protective device, using fourier
Algorithm calculates separately protection voltage, residual voltage and observing and controlling voltage respectively voltage reality imaginary part and virtual value；
Step 3: Sudden Changing Rate calculates.The Sudden Changing Rate is the exhausted of the difference of the currently active value of analog quantity and two weeks wavefront virtual values
To value, including protective current Sudden Changing Rate, observing and controlling jump-value of current and zero-sequence current Sudden Changing Rate, including protection voltage jump amount, survey
Control voltage jump amount and residual voltage Sudden Changing Rate；
Step 4: analog quantity mutation judgement.Judge whether protective current, observing and controlling electric current and zero-sequence current are mutated respectively, respectively
Judge to protect whether voltage, observing and controlling voltage and residual voltage are mutated；The analog quantity mutation refers to that corresponding Sudden Changing Rate is greater than and sets for it
The Sudden Changing Rate threshold value set；
Step 5:AD judges extremely；It is specifically divided into Sudden Changing Rate diagnostic method and two kinds of virtual value comparison method, wherein Sudden Changing Rate is sentenced
Other method are as follows: when certain phase protective current and observing and controlling electric current have and only one is mutated, determine phase current exception, otherwise determining should
Phase current is normal；When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, determines phase voltage exception, otherwise sentence
The fixed phase voltage is normal；When three-phase current is normal, if zero-sequence current is mutated, determines that zero-sequence current is abnormal, otherwise determine zero
Sequence electric current is normal；When three-phase voltage is normal, if residual voltage is mutated, determines that residual voltage is abnormal, otherwise determine zero sequence electricity
Positive pressure is normal.When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, i.e. judgement AD is abnormal, needs to be latched
Correlation protection.
Virtual value comparison method are as follows: i.e. when the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value
Ratio be greater than for its setting threshold value when, determine the phase current exception, otherwise determine that the phase current is normal.When certain is mutually protected
When the threshold value that the ratio of the absolute value of the difference and sum of the two of voltage and observing and controlling voltage effective value is greater than for its setting, determining should
Phase voltage is abnormal, otherwise determines that the phase voltage is normal.Above-mentioned Sudden Changing Rate diagnostic method and virtual value comparison method can be used alone, and also may be used
It is applied in combination.
Preferred embodiment five, a kind of computer readable storage medium, including instruction, when run on a computer, make
It obtains computer and executes the AD method of calibration for being used for measuring and controlling protective device, the AD method of calibration for measuring and controlling protective device includes
Following steps: the AD method of calibration for measuring and controlling protective device includes the following steps:
Step 1: virtual value calculates.General protective current is derived from protection CT, and zero-sequence current is derived from zero sequence CT, and observing and controlling electric current takes
Measurement CT, using fourier algorithm calculate separately protective current, zero-sequence current and observing and controlling electric current respectively electric current reality imaginary part and effectively
Value；General voltage is derived from bus or bus PT, protection voltage and observing and controlling voltage is divided into measuring and controlling protective device, using fourier
Algorithm calculates separately protection voltage, residual voltage and observing and controlling voltage respectively voltage reality imaginary part and virtual value；
Step 3: Sudden Changing Rate calculates.The Sudden Changing Rate is the exhausted of the difference of the currently active value of analog quantity and two weeks wavefront virtual values
To value, including protective current Sudden Changing Rate, observing and controlling jump-value of current and zero-sequence current Sudden Changing Rate, including protection voltage jump amount, survey
Control voltage jump amount and residual voltage Sudden Changing Rate；
Step 4: analog quantity mutation judgement.Judge whether protective current, observing and controlling electric current and zero-sequence current are mutated respectively, respectively
Judge to protect whether voltage, observing and controlling voltage and residual voltage are mutated；The analog quantity mutation refers to that corresponding Sudden Changing Rate is greater than and sets for it
The Sudden Changing Rate threshold value set；
Step 5:AD judges extremely；It is specifically divided into Sudden Changing Rate diagnostic method and two kinds of virtual value comparison method, wherein Sudden Changing Rate is sentenced
Other method are as follows: when certain phase protective current and observing and controlling electric current have and only one is mutated, determine phase current exception, otherwise determining should
Phase current is normal；When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, determines phase voltage exception, otherwise sentence
The fixed phase voltage is normal；When three-phase current is normal, if zero-sequence current is mutated, determines that zero-sequence current is abnormal, otherwise determine zero
Sequence electric current is normal；When three-phase voltage is normal, if residual voltage is mutated, determines that residual voltage is abnormal, otherwise determine zero sequence electricity
Positive pressure is normal.When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, i.e. judgement AD is abnormal, needs to be latched
Correlation protection.
Virtual value comparison method are as follows: i.e. when the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value
Ratio be greater than for its setting threshold value when, determine the phase current exception, otherwise determine that the phase current is normal.When certain is mutually protected
When the threshold value that the ratio of the absolute value of the difference and sum of the two of voltage and observing and controlling voltage effective value is greater than for its setting, determining should
Phase voltage is abnormal, otherwise determines that the phase voltage is normal.Above-mentioned Sudden Changing Rate diagnostic method and virtual value comparison method can be used alone, and also may be used
It is applied in combination.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When using entirely or partly realizing in the form of a computer program product, the computer program product include one or
Multiple computer instructions.When loading on computers or executing the computer program instructions, entirely or partly generate according to
Process described in the embodiment of the present invention or function.The computer can be general purpose computer, special purpose computer, computer network
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or from one
Computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from one
A web-site, computer, server or data center pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)
Or wireless (such as infrared, wireless, microwave etc.) mode is carried out to another web-site, computer, server or data center
Transmission).The computer-readable storage medium can be any usable medium or include one that computer can access
The data storage devices such as a or multiple usable mediums integrated server, data center.The usable medium can be magnetic Jie
Matter, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid
State Disk (SSD)) etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of AD method of calibration for measuring and controlling protective device, pass through protective number to measuring and controlling protective device and corresponding observing and controlling
Data comparison, and the data comparison with external zero sequence are measured, the detection in analog acquisition circuit is carried out；It is characterized by: at least
Include the following steps:
Step 1: virtual value calculates；
Step 2: Sudden Changing Rate calculates；The Sudden Changing Rate is the absolute of the difference of the currently active value of analog quantity and two weeks wavefront virtual values
Value；
Step 3: analog quantity mutation judgement；The analog quantity sports corresponding Sudden Changing Rate and is greater than the Sudden Changing Rate threshold being arranged for it
Value；
Step 4: AD judges extremely；Specifically:
When certain phase protective current and observing and controlling electric current have and only one is mutated, then the phase current is abnormal, otherwise determines phase electricity
Stream is normal；
When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, then the phase voltage is abnormal, otherwise determines phase electricity
Positive pressure is normal；
When three-phase current is normal, if zero-sequence current is mutated, zero-sequence current is abnormal, otherwise determines that zero-sequence current is normal；
When three-phase voltage is normal, if residual voltage is mutated, residual voltage is abnormal, otherwise determines that residual voltage is normal；
When the ratio of the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value is greater than for its setting
When threshold value, then the phase current is abnormal, otherwise determines that the phase current is normal；When certain mutually protect voltage and observing and controlling voltage effective value it
When the threshold value that the ratio of absolute value of the difference and sum of the two is greater than for its setting, then the phase voltage is abnormal, otherwise determines the phase
Voltage is normal；
When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, then AD is abnormal, needs to be latched related guarantor
Shield.
2. a kind of system of the AD method of calibration for measuring and controlling protective device, by the protective number to measuring and controlling protective device and accordingly
Observing and controlling amount data comparison, and the data comparison with external zero sequence carries out the detection in analog acquisition circuit；Its feature exists
In: it includes at least:
Virtual value computing module: virtual value calculates；
Sudden Changing Rate computing module: Sudden Changing Rate calculates；The Sudden Changing Rate be the currently active value of analog quantity and two weeks wavefront virtual values it
Absolute value of the difference；
Analog quantity is mutated judgment module: analog quantity mutation judgement；The analog quantity sport corresponding Sudden Changing Rate be greater than be arranged for it
Sudden Changing Rate threshold value；
AD exception judgment module: AD judges extremely；Specifically:
When certain phase protective current and observing and controlling electric current have and only one is mutated, then the phase current is abnormal, otherwise determines phase electricity
Stream is normal；
When certain mutually protects voltage and observing and controlling voltage to have and only one is mutated, then the phase voltage is abnormal, otherwise determines phase electricity
Positive pressure is normal；
When three-phase current is normal, if zero-sequence current is mutated, zero-sequence current is abnormal, otherwise determines that zero-sequence current is normal；
When three-phase voltage is normal, if residual voltage is mutated, residual voltage is abnormal, otherwise determines that residual voltage is normal；
When the ratio of the absolute value of the difference and sum of the two of certain phase protective current and observing and controlling current effective value is greater than for its setting
When threshold value, then the phase current is abnormal, otherwise determines that the phase current is normal；When certain mutually protect voltage and observing and controlling voltage effective value it
When the threshold value that the ratio of absolute value of the difference and sum of the two is greater than for its setting, then the phase voltage is abnormal, otherwise determines the phase
Voltage is normal；
When three-phase current, zero-sequence current, three-phase voltage or residual voltage are deposited when abnormal, then AD is abnormal, needs to be latched related guarantor
Shield.
3. a kind of computer program realized described in claim 1 for the AD method of calibration of measuring and controlling protective device.
4. a kind of information data processing terminal realized described in claim 1 for the AD method of calibration of measuring and controlling protective device.
5. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer is executed as weighed
Benefit require 1 described in be used for measuring and controlling protective device AD method of calibration.
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| CN201811318573.3A CN109254216B (en) | 2018-11-07 | 2018-11-07 | AD (analog-digital) verification method and system for measurement and control protection device |
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| CN110045206A (en) * | 2019-04-26 | 2019-07-23 | 紫光测控有限公司 | Redundancy check method and system for protection supervisory equipment nonredundancy AD acquisition |
| CN110716155A (en) * | 2019-10-24 | 2020-01-21 | 国网上海市电力公司 | Low-voltage power supply loop abnormal working condition perception algorithm and device |
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