CN109655782A - A kind of three-phase electric energy meter wiring exception self checking method and system - Google Patents
A kind of three-phase electric energy meter wiring exception self checking method and system Download PDFInfo
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- CN109655782A CN109655782A CN201910065753.3A CN201910065753A CN109655782A CN 109655782 A CN109655782 A CN 109655782A CN 201910065753 A CN201910065753 A CN 201910065753A CN 109655782 A CN109655782 A CN 109655782A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The present invention relates to a kind of three-phase electric energy meter wiring exception self checking method and systems, the three-phase electric energy meter internal processes pass through to each phase voltage size, each phase current size, whether negative phase sequence and each phase phase angle are judged the current line wiring to determine single detection with the presence or absence of abnormal to voltage, and single detection current line wiring abnormal conditions are constantly detected at interval of certain time, finally to determine current line wiring abnormal conditions, and result is shown to or is transferred to power information acquisition system, it realizes the fast automatic detecting of three-phase electric energy meter wiring exception and feeds back exception information, to raising power grid metering accuracy, connection box of electric energy meter is checked extremely, solve that there is very strong engineer application directive significance.
Description
Technical field
The present invention relates to electric energy meter technical field more particularly to a kind of three-phase electric energy meter wiring exception self checking method and it is
System.
Background technique
Three-phase electric energy meter wiring usually has situations such as separate misconnection of three-phase voltage, three-phase electricity streamline separate misconnection extremely, connects
It will cause the consequence that electric energy meter is reversely measured, do not measured, metering etc. seriously affects measurement error less after wrong line.
Currently, evading the main Prevention method of three-phase electric energy meter abnormal wiring has: the installation of specification electric energy meter metering device connects
Line and technique carry out manual inspection to installation and wiring result and butted line situation are inspected periodically by line attendant,
And wiring etc. is changed in user side control to avoid user privately.
Current three-phase electric energy meter abnormal wiring Prevention method has the following problems: being limited to installation company and site operation
The technical level of personnel, error rate is high, and actual effect is poor；Electric energy meter quantity is big, distribution is wide, by manual inspection, maintenance cost
Height, low efficiency；Can not in time, fast acquiring wiring exception information, and then expand measurement error caused by influence.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide one kind can in time, accurate detection go out three-phase electric energy meter
The three-phase electric energy meter wiring exception self checking method and system of wiring exception reduce electric energy meter measurement error shadow caused by abnormal wiring
It rings, reduces supplier of electricity loss and customer complaint.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of three-phase electric energy meter wiring is abnormal from procuratorial organ
Method, it is characterised in that: the method includes,
S1, at interval of the Δ t time to every phase current line wiring abnormality mark position whether set and each phase current line wiring list
It is secondary to detect whether that exception is judged；
S2, in the non-set of flag bit and abnormal current line wiring single detection, the abnormal number that enters adds 1, works as flag bit
When non-set and normal electric current wiring, the abnormal number that enters is reset；In flag bit set and current line wiring single detection exception
When, number clearing is exited extremely to be exited number extremely when flag bit set and normal current line wiring single detection and add 1；
S3 judges that exception enters whether number is greater than given threshold when adding 1 into number extremely；It is secondary when exiting extremely
When number adds 1, judge that exception exits whether number is greater than given threshold；
S4, when entering number greater than given threshold extremely, then current line wiring abnormality mark position position, shows current line
Wiring is abnormal, returns and executes S1, when being less than or equal to given threshold into number extremely, returns and executes S1；It is secondary when exiting extremely
When number is greater than given threshold, then current line wiring abnormality mark bit clear, display current line wiring remove extremely, return and execute
S1 is returned when exiting number less than or equal to given threshold extremely and is executed S1.
Further, the current line wiring single detection method includes,
S11, each phase current line wiring abnormality detection submodule judge whether three-phase voltage is all larger than threshold voltage, if so,
S12 is then executed, if not, then it represents that current line wiring is normal；
S12, judge voltage whether negative phase sequence, if so, setting voltage negative phase sequence indicates that pressure-wire wiring is abnormal, if it is not, then
Execute S13；
S13, judges whether three-phase current is all larger than threshold current, if not, then it represents that current line wiring is normal, if so,
Execute S14；
S14, judges whether each phase phase angle meets setting range requirement, if so, indicate that current line wiring is normal, if it is not,
Then indicate that current line wiring is abnormal.
Further, the voltage negative phase sequence judgment mode is to judge that A, C voltage between phases angle theta ac are greater than the alternate electricity of A, B
Angle theta ab is pressed, voltage link is abnormal, removes voltage negative phase sequence if so, removing, if it is not, setting voltage link exception, it is inverse to set voltage
Phase sequence.
Further, in order to improve detection accuracy, the voltage negative phase sequence judgment mode is to judge A, C voltage between phases
Whether angle theta ac meets with A, B voltage between phases angle theta ab: 250 ° of 230 ° and 130 ° of > θ ac >, 110 ° of > of > θ ab, if so,
It removes voltage link exception, remove voltage negative phase sequence, if it is not, setting voltage link exception, set voltage negative phase sequence.
Further, the Δ t value is 1s.
Further, the given threshold is 60.
Further, the phase angle setting range is -90 ° to 90 °.
Further, the phase angle setting range is 0 ° to 60 °.
Further, the voltage rating that the threshold voltage is 0.6 times, the specified electricity that the threshold current is 0.02 times
Stream.
A kind of three-phase electric energy meter wiring exception self-checking system, the system comprises three-phase electric energy meters, power information acquisition system
The communication channel of system and connection three-phase electric energy meter and power information acquisition system, the three-phase electric energy meter include outer for acquiring
Sampling module, the display module for showing connection box of electric energy meter exception information of portion's voltage and current input signal, feature exist
In:
The three-phase electric energy meter further includes using the internal abnormality wiring selftest module such as aforementioned the method；
The power information acquisition system passes through communication channel copy reading three-phase electric energy meter wiring exception information and positions exception
Wiring electric energy meter.
Compared with the prior art, the advantages of the present invention are as follows: three-phase electric energy meter internal processes by each phase voltage size,
Whether negative phase sequence and each phase phase angle are judged to determine that single detection current line wiring whether there is for each phase current size, voltage
It is abnormal, and current line wiring abnormal conditions are constantly detected at interval of certain time, finally to determine that current line wiring is different
Reason condition, and result is shown or is transferred to power information acquisition system, realize the quick of three-phase electric energy meter wiring exception
Automatically exception information is detected and feeds back, to power grid metering accuracy is improved, connection box of electric energy meter investigation, solution extremely are with very strong
Engineer application directive significance.
Detailed description of the invention
Fig. 1 is a kind of flow chart of embodiment of the invention；
Fig. 2 be a kind of embodiment of the invention current line wiring whether Yi Chang decision flow chart；
Fig. 3 is a kind of system structure diagram of embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
It is as shown in Figure 1 a kind of flow chart of embodiment of the invention, the three-phase electric energy meter wiring exception self checking method, packet
Include following steps:
The internal processes of S1, three-phase electric energy meter detect at interval of the Δ t time each phase current line wiring abnormal conditions of A, B, C
It carries out primary, and judges whether set and electric current wiring single detect whether exception for current line wiring abnormality mark position；
S2, in the non-set of flag bit, when current line wiring single detects exception, then the abnormal number that enters adds 1, works as electricity
When the detection of streamline wiring single is normal, the abnormal number that enters is reset；In flag bit set, when the detection of current line wiring single is different
Chang Shi exits number clearing extremely, when the detection of current line wiring single is normal, exits number extremely and adds 1；
S3 judges that exception enters whether number is greater than given threshold after entering number extremely and adding 1；When exception exits number
Judge that exception exits whether number is greater than given threshold after adding 1；
S4, when entering number greater than given threshold extremely, then current line wiring abnormality mark position position, shows current line
Wiring exception simultaneously returns to execution S1, when entering number less than or equal to given threshold extremely, returns to execution S1；It is secondary when exiting extremely
When number is greater than given threshold, then current line wiring abnormality mark bit clear, display current line wiring remove extremely and return to execution
S1 is returned when exiting number less than or equal to given threshold extremely and is executed S1.
In the present embodiment, the current line wiring single detection method specifically comprises the following steps,
S11, judges whether three-phase voltage is all larger than threshold voltage, if so, S12 is executed, if it is not, then current line wiring list
Secondary detection is normal；
S12, after only checking out pressure-wire wiring exception, ability accurate judgement is abnormal with the presence or absence of electric current wiring,
Therefore judge whether negative phase sequence if so, setting voltage negative phase sequence indicates the detection of pressure-wire wiring single extremely to voltage, if
It is no, then execute S13；
S13, judges whether three-phase current is all larger than threshold current, if it is not, then the detection of current line wiring single is normal, if
It is then to execute S14；
S14, judges whether each phase phase angle meets setting range requirement, if so, the detection of current line wiring single is normal, if
It is no, then it represents that the detection of current line wiring single is abnormal.
The abnormal conditions to primarily determine current line wiring are detected by current line wiring single, this single detects every
It is carried out once every Δ t, it is just final to determine electricity when preliminary abnormal conditions, which continue number, reaches given threshold by repeated detection
Streamline wiring is with the presence or absence of exception and is shown by display to prompt management and maintenance personnel.
It can be because causing current line wiring abnormal due to wiretapping stealing etc. after current line wiring is normal, Huo Zhejie
Whether restore situations such as normal by maintenance after line exception, requires to carry out self-test, the self checking method of the invention is to continue
It carries out, to monitor the wiring abnormal conditions of three-phase electric energy meter at any time, administrative staff is facilitated to grasp in time.
As a preference, the voltage negative phase sequence judgment mode is to judge that A, C voltage between phases angle theta ac are greater than A, B phase
Between voltage angle theta ab, if so, removing, voltage link is abnormal, removes voltage negative phase sequence, if it is not, setting voltage link exception, sets electricity
Press negative phase sequence.
In order to improve detection accuracy, the voltage negative phase sequence judgment mode be judge A, C voltage between phases angle theta ac with
A, whether B voltage between phases angle theta ab meets: 250 ° of 230 ° and 130 ° of > θ ac >, 110 ° of > of > θ ab, connects if so, removing voltage
Line is abnormal, removes voltage negative phase sequence, if it is not, setting voltage link exception, sets voltage negative phase sequence.
In the present embodiment, the Δ t value is 1s, and certainly, the value of Δ t can also use position according to three-phase electric energy meter
It sets, the factors such as user demand are adjusted.
As a preference, the given threshold is 60, the size of given threshold and the wiring of three-phase electric energy meter are sentenced extremely
Disconnected accuracy, the measuring accuracy etc. of three-phase electric energy meter are related, can select according to the actual situation.
As a preference, the phase angle setting range is -90 ° to 90 °, it as a further preference, can be according to existing
Field power utilization environment selects suitable phase angle range, should when the phase angle setting range is 0 ° to 60 ° according to actual practice experience
Self checking method has preferable accuracy.
As a preference, the voltage rating that the threshold voltage is 0.6 times.
As a preference, the rated current that the threshold current is 0.02 times.
The present invention also provides a kind of three-phase electric energy meter wiring exception self-checking system, which includes three-phase electric energy meter, leads to
Believe channel and power information acquisition system；Three-phase electric energy meter includes sampling module (not shown), using aforementioned self-checking algorithm
Back panel wiring exception selftest module and display module；
Three-phase electric energy meter samples external voltage, current input signal by sampling module, passes through internal abnormality wiring self-test
Algorithm detects ammeter wiring state, and exports physical cabling state；
Display module is used for when electric energy meter detects electric current wiring exception, and correspondence shows exception information on electric energy meter,
Abnormal point is positioned convenient for power circuit maintenance personnel, maintenance is corrected abnormal in time.
As one embodiment, the mode that exception information is shown can be with are as follows: Err-XXXX, for example, Err-Ia indicates that A phase is electric
It is abnormal to flow wiring, Err-Ib indicates that the wiring of B phase current is abnormal, and it further includes Err- that Err-Ic indicates that the wiring of C phase current is abnormal certainly
Iab, Err-Ibc, Err-Iac, Err-Iabc etc..
Communication channel for realizing three-phase electric energy meter and power information acquisition system data interaction, it can in real time by
Electric energy meter field detects that wiring abnormal conditions pass to power information acquisition system；Communication channel specifically include that carrier wave,
RS485, infrared, wireless module etc..
The wiring exception information that power information acquisition system is checked by communication channel copy reading three-phase electric energy meter positions different
Normal wiring electric energy meter, maintenance is corrected abnormal in time.
Other than above-mentioned improvement, other similar improvement are also contained in improvement threshold of the invention, are not just existed herein
It repeats.Although an embodiment of the present invention has been shown and described, it will be appreciated by those skilled in the art that: do not departing from the present invention
Principle and objective in the case where can to these embodiments carry out it is a variety of variation, modification, replacement and deformation, the scope of the present invention
It is defined by the claims and their equivalents.
Claims (10)
1. a kind of three-phase electric energy meter wiring exception self checking method, it is characterised in that: the method includes,
S1, at interval of the Δ t time, to every phase current line wiring abnormality mark position, whether set and each phase current line wiring single are examined
Survey whether exception is judged；
S2, in the non-set of flag bit and abnormal current line wiring single detection, the abnormal number that enters adds 1, when flag bit is not set
Position and when electric current wiring is normal, the abnormal number that enters is reset；It is different in flag bit set and abnormal current line wiring single detection
Number clearing is often exited to exit number extremely when flag bit set and normal current line wiring single detection and add 1；
S3 judges that exception enters whether number is greater than given threshold when adding 1 into number extremely；When exiting number adds 1 extremely
When, judge that exception exits whether number is greater than given threshold；
S4, when entering number greater than given threshold extremely, then current line wiring abnormality mark position position, shows current line wiring
It is abnormal, it returns and executes S1, when being less than or equal to given threshold into number extremely, return and execute S1；It is big when exiting number extremely
When given threshold, then current line wiring abnormality mark bit clear, display current line wiring remove extremely, return and execute S1, when
When exception exits number less than or equal to given threshold, returns and execute S1.
2. method according to claim 1, it is characterised in that:
The current line wiring method for detecting abnormality includes,
S11, each phase current line wiring abnormality detection submodule judges whether three-phase voltage is all larger than threshold voltage, if so, holding
Row S12, if not, then it represents that current line wiring is normal；
S12, judge voltage whether negative phase sequence, if so, setting voltage negative phase sequence indicates that pressure-wire wiring is abnormal, if it is not, then executing
S13；
S13, judges whether three-phase current is all larger than threshold current, if not, then it represents that current line wiring is normal, if so, executing
S14；
S14, judges whether each phase phase angle meets setting range requirement, if so, indicating that current line wiring is normal, if it is not, then table
Show that current line wiring is abnormal.
3. method according to claim 2, it is characterised in that:
The judgment mode of voltage negative phase sequence is in the S12,
Judge that A, C voltage between phases angle theta ac are greater than A, B voltage between phases angle theta ab, voltage link is abnormal, removes if so, removing
Voltage negative phase sequence sets voltage negative phase sequence if it is not, setting voltage link exception.
4. method according to claim 3, it is characterised in that:
The judgment mode of voltage negative phase sequence is in the S12,
Judge whether A, C voltage between phases angle theta ac and A, B voltage between phases angle theta ab meet: 250 ° of 230 ° and 130 ° of > θ ac >
110 ° of > of > θ ab, if so, removing, voltage link is abnormal, removes voltage negative phase sequence, if it is not, setting voltage link exception, sets voltage
Negative phase sequence.
5. method according to claim 1, it is characterised in that:
The Δ t value is 1s.
6. method according to claim 1, it is characterised in that:
The given threshold is 60.
7. method according to claim 2, it is characterised in that:
The phase angle setting range is -90 ° to 90 °.
8. method according to claim 7, it is characterised in that:
The phase angle setting range is 0 ° to 60 °.
9. method according to claim 2, it is characterised in that:
The voltage rating that the threshold voltage is 0.6 times, the rated current that the threshold current is 0.02 times.
10. a kind of three-phase electric energy meter wiring exception self-checking system, the system comprises three-phase electric energy meters, power information acquisition system
The communication channel of system and connection three-phase electric energy meter and power information acquisition system, the three-phase electric energy meter include outer for acquiring
Sampling module, the display module for showing connection box of electric energy meter exception information of portion's voltage and current input signal, feature exist
In:
The three-phase electric energy meter further includes using the internal abnormality wiring self-test mould such as any one of claim 1-9 the method
Block；
The power information acquisition system passes through communication channel copy reading three-phase electric energy meter wiring exception information and positions abnormal wiring
Electric energy meter.
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| CN201910065753.3A CN109655782B (en) | 2019-01-23 | 2019-01-23 | Three-phase electric energy meter wiring abnormity self-checking method and system |
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Cited By (5)
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| CN110824409A (en) * | 2019-11-22 | 2020-02-21 | 周秀琴 | Three-phase three-wire electric energy meter wiring mode identification method, electric energy meter and equipment |
| CN111060754A (en) * | 2019-12-31 | 2020-04-24 | 南京新联智慧能源服务有限公司 | Electric energy information acquisition terminal with automatic phase sequence identification function and automatic phase sequence identification method |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN113484627A (en) * | 2021-07-13 | 2021-10-08 | 中国第一汽车股份有限公司 | Wiring detection method and device for electric drive system and motor control system |
| CN113640710A (en) * | 2021-08-13 | 2021-11-12 | 深圳市新威尔电子有限公司 | Channel crossing automatic detection method |
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