CN109975608A - The power grid type judgement method of three-phase electric energy meter, device and system - Google Patents
The power grid type judgement method of three-phase electric energy meter, device and system Download PDFInfo
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- CN109975608A CN109975608A CN201910246876.7A CN201910246876A CN109975608A CN 109975608 A CN109975608 A CN 109975608A CN 201910246876 A CN201910246876 A CN 201910246876A CN 109975608 A CN109975608 A CN 109975608A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller, or for passing one of the input signals as output signal
Abstract
The present invention provides the power grid type judgement methods of three-phase electric energy meter, device and system, it include: the angle for acquiring network voltage and network voltage, network voltage includes first voltage, second voltage and tertiary voltage, the angle of network voltage includes the first angle and first voltage of first voltage and second voltage and the second angle of tertiary voltage；Whether the voltage for judging the first phase line is first voltage；If it is, whether the voltage for judging third phase line is tertiary voltage；If it is, whether the voltage for judging the second phase line is second voltage；If it is, determining the type of power grid according to the size of the size of the first angle and second voltage；If it is not, then determining the type of power grid according to the size of the size of the second angle and/or tertiary voltage, multiple voltage specification and a variety of power grid types are realized by a kind of three-phase electric energy meter, reduce production cost.
Description
Technical field
The present invention relates to technical field of electric power, more particularly, to the power grid type judgement method of three-phase electric energy meter, device and
System.
Background technique
General power grid type includes 57.7V, 100V and 220V voltage of phase three-wire three or 57.7V, 100V of three-phase and four-line
Therefore when being designed according to power grid type to three-phase electric energy meter, need to design a plurality of types of three-phase electric energies with 220V voltage
Table.Then as the increase of three-phase electric energy meter type, production cost is greatly increased.
Summary of the invention
In view of this, the purpose of the present invention is to provide the power grid type judgement method of three-phase electric energy meter, device and system,
Multiple voltage specification and a variety of power grid types are realized by a kind of three-phase electric energy meter, reduce production cost.
In a first aspect, the embodiment of the invention provides the power grid type judgement methods of three-phase electric energy meter, which comprises
Acquire network voltage and the network voltage angle, the network voltage include first voltage, second voltage and
Tertiary voltage, the angle of the network voltage include the first angle of the first voltage and the second voltage and described
Second angle of first voltage and the tertiary voltage；
Whether the voltage for judging the first phase line is the first voltage；
If the voltage of first phase line is the first voltage, judge whether the voltage of third phase line is described the
Three voltages；
If the voltage of the third phase line is the tertiary voltage, judge whether the voltage of the second phase line is described the
Two voltages；
If the voltage of second phase line is the second voltage, according to the size of first angle and described the
The size of two voltages determines the type of power grid；
If the voltage of second phase line is not the second voltage, according to the size of second angle and/or
The size of the tertiary voltage determines the type of the power grid.
Further, the class that power grid is determined according to the size of first angle and the size of the second voltage
Type, comprising:
Judge first angle whether in the first predetermined angle threshold value；
If in first predetermined angle threshold value, it is pre- to judge whether the second voltage is greater than for first angle
If voltage；
If the second voltage is greater than the predeterminated voltage, the type of the power grid is the 220V electricity of three-phase and four-line
Pressure；
If the second voltage is less than the predeterminated voltage, the type of the power grid is the three-phase and four-line
57.7V voltage.
Further, described that the electricity is determined according to the size of second angle and/or the size of the tertiary voltage
The type of net, comprising:
Judge second angle whether in the second predetermined angle threshold value；
If second angle, in second predetermined angle threshold value, the type of the power grid is phase three-wire three
100V voltage；
If whether second angle not in second predetermined angle threshold value, judges second angle
In three predetermined angle threshold values；
If in the third predetermined angle threshold value, it is pre- to judge whether the tertiary voltage is greater than for second angle
If voltage；
If the tertiary voltage is greater than the predeterminated voltage, the type of the power grid is the 220V electricity of three-phase and four-line
Pressure；
If the tertiary voltage is less than the predeterminated voltage, the type of the power grid is the three-phase and four-line
57.7V voltage.
Further, first predetermined angle threshold value is 110 degree to 130 degree.
Further, second predetermined angle threshold value is 290 degree to 310 degree, and the third predetermined angle threshold value is 230
Degree is to 250 degree.
Second aspect, the embodiment of the invention provides the power grid kind judging device of three-phase electric energy meter, described device includes:
Sample circuit, for acquiring the angle of network voltage and the network voltage, the network voltage includes the first electricity
Pressure, second voltage and tertiary voltage, the angle of the network voltage include the first of the first voltage and the second voltage
Second angle of angle and the first voltage and the tertiary voltage；
Master control chip, for judging whether the voltage of the first phase line is the first voltage；If first phase line
Voltage be the first voltage, then judge whether the voltage of third phase line is the tertiary voltage；If the third phase line
Voltage be the tertiary voltage, then judge whether the voltage of the second phase line is the second voltage；If second phase line
Voltage be the second voltage, then the class of power grid is determined according to the size of the size of first angle and the second voltage
Type；If the voltage of second phase line is not the second voltage, according to the size of second angle and/or described
The size of three voltages determines the type of the power grid.
Further, the Master control chip is specifically used for:
Judge first angle whether in the first predetermined angle threshold value；
If in first predetermined angle threshold value, it is pre- to judge whether the second voltage is greater than for first angle
If voltage；
If the second voltage is greater than the predeterminated voltage, the type of the power grid is the 220V electricity of three-phase and four-line
Pressure；
If the second voltage is less than the predeterminated voltage, the type of the power grid is the three-phase and four-line
57.7V voltage.
Further, the Master control chip is specifically used for:
Judge second angle whether in the second predetermined angle threshold value；
If second angle, in second predetermined angle threshold value, the type of the power grid is phase three-wire three
100V voltage；
If whether second angle not in second predetermined angle threshold value, judges second angle
In three predetermined angle threshold values；
If in the third predetermined angle threshold value, it is pre- to judge whether the tertiary voltage is greater than for second angle
If voltage；
If the tertiary voltage is greater than the predeterminated voltage, the type of the power grid is the 220V electricity of three-phase and four-line
Pressure；
If the tertiary voltage is less than the predeterminated voltage, the type of the power grid is the three-phase and four-line
57.7V voltage.
It further, further include metering chip, the network voltage and the electricity for acquiring the sample circuit
The angle of net voltage is converted into digital form by analog form.
The third aspect, the embodiment of the invention provides the power grid types of three-phase electric energy meter to judge system, including as described above
The power grid kind judging device of three-phase electric energy meter further includes power network wiring terminal, and the power network wiring terminal includes phase three-wire three
Or three-phase and four-line, wherein three lines, three line is arranged successively according to the first phase line, sky, third phase line and the second phase line, and described three
Four line of phase is arranged successively according to first phase line, second phase line, the third phase line and ground wire.
The embodiment of the invention provides the power grid type judgement methods of three-phase electric energy meter, device and system, comprising: acquisition electricity
The angle of net voltage and network voltage, network voltage include first voltage, second voltage and tertiary voltage, the angle of network voltage
Second angle of the first angle and first voltage and tertiary voltage including first voltage and second voltage；Judge the first phase
Whether the voltage of line is first voltage；If the voltage of the first phase line be first voltage, judge third phase line voltage whether
For tertiary voltage；If the voltage of third phase line is tertiary voltage, judge whether the voltage of the second phase line is second voltage；Such as
The voltage of the second phase line of fruit is second voltage, then the class of power grid is determined according to the size of the size of the first angle and second voltage
Type；If the voltage of the second phase line is not second voltage, determined according to the size of the second angle and/or the size of tertiary voltage
The type of power grid realizes multiple voltage specification and a variety of power grid types by a kind of three-phase electric energy meter, reduces production cost.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the power grid type judgement method flow chart for the three-phase electric energy meter that the embodiment of the present invention one provides；
Fig. 2 is the power grid type judgement method flow chart of another three-phase electric energy meter provided by Embodiment 2 of the present invention；
Fig. 3 is the power grid kind judging device schematic diagram for the three-phase electric energy meter that the embodiment of the present invention three provides；
Fig. 4 is that the power grid type for the three-phase electric energy meter that the embodiment of the present invention four provides judges system schematic.
Icon:
10- sample circuit；20- metering chip；30- Master control chip；40- Switching Power Supply；50- power network wiring terminal.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
To be described in detail to the embodiment of the present invention below convenient for understanding the present embodiment.
Embodiment one:
Fig. 1 is the power grid type judgement method flow chart for the three-phase electric energy meter that the embodiment of the present invention one provides.
Referring to Fig.1, method includes the following steps:
Step S101, acquire network voltage and network voltage angle, network voltage include first voltage, second voltage and
Tertiary voltage, the angle of network voltage include the first angle and first voltage and the third electricity of first voltage and second voltage
Second angle of pressure；
Here, first voltage Ua, second voltage Ub, tertiary voltage Uc, the first of first voltage and second voltage
Angle is ∠ Uab, and the second angle of first voltage and tertiary voltage is ∠ Uac.
Step S102 judges whether the voltage of the first phase line is first voltage；If the voltage of the first phase line is the first electricity
Pressure, thens follow the steps S103；If the voltage of the first phase line is not first voltage, S107 is thened follow the steps；
Step S103 judges whether the voltage of third phase line is tertiary voltage；If the voltage of third phase line is third electricity
Pressure, thens follow the steps S104；If the voltage of third phase line is not tertiary voltage, S107 is thened follow the steps；
Step S104 judges whether the voltage of the second phase line is second voltage；If the voltage of the second phase line is the second electricity
Pressure, thens follow the steps S105；If the voltage of the second phase line is not second voltage, S106 is thened follow the steps；
Step S105 determines the type of power grid according to the size of the size of the first angle and second voltage；
Step S106 determines the type of power grid according to the size of the size of the second angle and/or tertiary voltage；
Step S107, voltage specification misjudgment, is handled according to last time voltage specification.
In the present embodiment, the angle of network voltage and network voltage is acquired, network voltage includes first voltage, the second electricity
Pressure and tertiary voltage, the angle of network voltage include the first angle and first voltage and the of first voltage and second voltage
Second angle of three voltages；Whether the voltage for judging the first phase line is first voltage；If the voltage of the first phase line is the first electricity
Pressure, then judge whether the voltage of third phase line is tertiary voltage；If the voltage of third phase line is tertiary voltage, second is judged
Whether the voltage of phase line is second voltage；If the voltage of the second phase line is second voltage, according to the size of the first angle and
The size of second voltage determines the type of power grid；If the voltage of the second phase line is not second voltage, according to the second angle
Size and/or the size of tertiary voltage determine the type of power grid, realize multiple voltage specification and more by a kind of three-phase electric energy meter
Kind power grid type, reduces production cost.
Embodiment two:
Fig. 2 is the power grid type judgement method flow chart of another three-phase electric energy meter provided by Embodiment 2 of the present invention.
Referring to Fig. 2, method includes the following steps:
Step S201, acquire network voltage and network voltage angle, network voltage include first voltage, second voltage and
Tertiary voltage, the angle of network voltage include the first angle and first voltage and the third electricity of first voltage and second voltage
Second angle of pressure；
Here, first voltage Ua, second voltage Ub, tertiary voltage Uc, the first of first voltage and second voltage
Angle is ∠ Uab, and the second angle of first voltage and tertiary voltage is ∠ Uac.
Step S202 judges whether the voltage of the first phase line is first voltage；If the voltage of the first phase line is the first electricity
Pressure, thens follow the steps S203；If the voltage of the first phase line is not first voltage, S213 is thened follow the steps；
Step S203 judges whether the voltage of third phase line is tertiary voltage；If the voltage of third phase line is third electricity
Pressure, thens follow the steps S204；If the voltage of third phase line is not tertiary voltage, S213 is thened follow the steps；
Step S204 judges whether the voltage of the second phase line is second voltage；If the voltage of the second phase line is the second electricity
Pressure, thens follow the steps S205；If the voltage of the second phase line is not second voltage, S209 is thened follow the steps；
Whether step S205 judges the first angle in the first predetermined angle threshold value；If the first angle is default first
In angle threshold, S206 is thened follow the steps；If the first angle in the first predetermined angle threshold value, does not then follow the steps S213；
Here, the first predetermined angle threshold value be [120 ° -10 °, 120 °+10 °], the second predetermined angle threshold value be [300 ° -
10 °, 300 °+10 °], third predetermined angle threshold value is [240 ° -10 °, 240 °+10 °].That is the first predetermined angle threshold value is 110 degree
To 130 degree, the second predetermined angle threshold value is 290 degree to 310 degree, and the third predetermined angle threshold value is 230 degree to 250 degree.
Step S206, judges whether second voltage is greater than predeterminated voltage；If second voltage is greater than predeterminated voltage, execute
Step S207；If second voltage is less than predeterminated voltage, S208 is thened follow the steps；
Here, predeterminated voltage 100V.
Step S207, the type of power grid are the 220V voltage of three-phase and four-line；
Step S208, the type of power grid are the 57.7V voltage of three-phase and four-line；
Whether step S209 judges the second angle in the second predetermined angle threshold value；If the second angle is default second
In angle threshold, S210 is thened follow the steps；If the second angle in the second predetermined angle threshold value, does not then follow the steps S211；
Step S210, the type of power grid are the 100V voltage of phase three-wire three；
Whether step S211 judges the second angle in third predetermined angle threshold value；If the second angle is default in third
In angle threshold, S212 is thened follow the steps；If the second angle in third predetermined angle threshold value, does not then follow the steps S213；
Step S212, judges whether tertiary voltage is greater than predeterminated voltage；If tertiary voltage is greater than predeterminated voltage, execute
Step S207；If tertiary voltage is less than predeterminated voltage, S208 is thened follow the steps.
The judgement to the power grid type of three-phase electric energy meter is realized through the above steps, referring to table 1:
Table 1
As shown in Table 1, when the voltage of the first phase line is 100V, the voltage of the second phase line is 0V, and the voltage of third phase line is
100V, the first angle ∠ Uab are 0 degree, and when the second angle ∠ Uac is 300 degree, three-phase electric energy meter is phase three-wire three 100V；
When the voltage of the first phase line is 57.7V, the voltage of the second phase line is 57.7V, and the voltage of third phase line is 57.7V,
First angle ∠ Uab is 120 degree, and when the second angle ∠ Uac is 240 degree, three-phase electric energy meter is three-phase and four-line 57.7V；
When the voltage of the first phase line is 220V, the voltage of the second phase line is 220V, and the voltage of third phase line is 220V, first
Angle ∠ Uab is 120 degree, and when the second angle ∠ Uac is 240 degree, three-phase electric energy meter is phase three-wire three 220V.
Embodiment three:
Fig. 3 is the power grid kind judging device schematic diagram for the three-phase electric energy meter that the embodiment of the present invention three provides.
Referring to Fig. 3, which includes: sample circuit 10, metering chip 20, Master control chip 30 and Switching Power Supply 40.It adopts
Sample circuit 10, metering chip 20 and Master control chip 30 are sequentially connected, Switching Power Supply 40 respectively with metering chip 20 and main control
Chip 30 is connected.
Sample circuit 10, for acquiring the angle of network voltage and network voltage, network voltage includes first voltage, second
Voltage and tertiary voltage, the angle of network voltage include first voltage and second voltage the first angle and first voltage and
Second angle of tertiary voltage；
Master control chip 30, for judging whether the voltage of the first phase line is first voltage；If the voltage of the first phase line
For first voltage, then judge whether the voltage of third phase line is tertiary voltage；If the voltage of third phase line is tertiary voltage,
Whether the voltage for judging the second phase line is second voltage；If the voltage of the second phase line is second voltage, according to the first angle
Size and the size of second voltage determine the type of power grid；If the voltage of the second phase line is not second voltage, according to
The size of two angles and/or the size of tertiary voltage determine the type of power grid.
Further, Master control chip 30 is specifically used for:
Judge the first angle whether in the first predetermined angle threshold value；
If the first angle in the first predetermined angle threshold value, judges whether second voltage is greater than predeterminated voltage；
If second voltage is greater than predeterminated voltage, the type of power grid is the 220V voltage of three-phase and four-line；
If second voltage is less than predeterminated voltage, the type of power grid is the 57.7V voltage of three-phase and four-line.
Further, Master control chip 30 is specifically used for:
Judge the second angle whether in the second predetermined angle threshold value；
If the second angle, in the second predetermined angle threshold value, the type of power grid is the 100V voltage of phase three-wire three；
If whether the second angle not in the second predetermined angle threshold value, judges the second angle in third predeterminated voltage threshold
In value；
If the second angle judges whether tertiary voltage is greater than predeterminated voltage in the third predetermined angle threshold value；
If tertiary voltage is greater than predeterminated voltage, the type of power grid is the 220V voltage of three-phase and four-line；
If tertiary voltage is less than predeterminated voltage, the type of power grid is the 57.7V voltage of the three-phase and four-line.
It further, further include metering chip, the angle of network voltage and network voltage for acquiring sample circuit
Digital form is converted by analog form.
It further include Switching Power Supply 40, for being powered to metering chip 20 and Master control chip 30, because of Switching Power Supply
40 there are the voltage range of wide-range, and though realize network voltage in 220V or 57.7V, metering chip 20 and master control coremaking
Piece 30 can operate normally.
The embodiment of the invention provides the power grid kind judging devices of three-phase electric energy meter, comprising: sample circuit is for acquiring
The angle of network voltage and network voltage, network voltage include first voltage, second voltage and tertiary voltage, the folder of network voltage
Angle includes the first angle and first voltage of first voltage and second voltage and the second angle of tertiary voltage；Master control coremaking
Piece is for judging whether the voltage of the first phase line is first voltage；If the voltage of the first phase line is first voltage, the is judged
Whether the voltage of triple line is tertiary voltage；If the voltage of third phase line is tertiary voltage, the voltage of the second phase line is judged
It whether is second voltage；If the voltage of the second phase line is second voltage, according to the size of the first angle and second voltage
Size determines the type of power grid；If the voltage of the second phase line is not second voltage, according to the size of the second angle and/or
The size of three voltages determines the type of power grid, realizes multiple voltage specification and a variety of power grid types by a kind of three-phase electric energy meter,
Reduce production cost.
Example IV:
Fig. 4 is that the power grid type for the three-phase electric energy meter that the embodiment of the present invention four provides judges system schematic.
Referring to Fig. 4, it further includes power network wiring terminal 50 which, which includes the power grid kind judging device of three-phase electric energy meter,
Power network wiring terminal 50 include phase three-wire three or three-phase and four-line, wherein three lines, three line according to the first phase line, sky, third phase line and
Second phase line is arranged successively, and three-phase and four-line is arranged successively according to the first phase line, the second phase line, third phase line and ground wire.Specifically,
First phase line is A, and the second phase line is B, and third phase line is C.
Specifically, power network wiring terminal 50 is connected with sample circuit 10 and Switching Power Supply 40 respectively.
The embodiment of the present invention also provides a kind of electronic equipment, including memory, processor and storage are on a memory and can
The computer program run on a processor, processor realize three-phase electric energy provided by the above embodiment when executing computer program
The step of power grid type judgement method of table.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program executes the power grid type judgement method of the three-phase electric energy meter of above-described embodiment when computer program is run by processor
The step of.
Computer program product provided by the embodiment of the present invention, the computer-readable storage including storing program code
Medium, the instruction that said program code includes can be used for executing previous methods method as described in the examples, and specific implementation can be joined
See embodiment of the method, details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of power grid type judgement method of three-phase electric energy meter, which is characterized in that the described method includes:
The angle of network voltage and the network voltage is acquired, the network voltage includes first voltage, second voltage and third
Voltage, the angle of the network voltage include the first angle and described first of the first voltage and the second voltage
Second angle of voltage and the tertiary voltage；
Whether the voltage for judging the first phase line is the first voltage；
If the voltage of first phase line is the first voltage, judge whether the voltage of third phase line is the third electricity
Pressure；
If the voltage of the third phase line is the tertiary voltage, judge whether the voltage of the second phase line is second electricity
Pressure；
If the voltage of second phase line is the second voltage, according to the size of first angle and second electricity
The size of pressure determines the type of power grid；
If the voltage of second phase line is not the second voltage, according to the size of second angle and/or described
The size of tertiary voltage determines the type of the power grid.
2. the power grid type judgement method of three-phase electric energy meter according to claim 1, which is characterized in that described according to
The size of the size of first angle and the second voltage determines the type of power grid, comprising:
Judge first angle whether in the first predetermined angle threshold value；
If first angle in first predetermined angle threshold value, judges whether the second voltage is greater than default electricity
Pressure；
If the second voltage is greater than the predeterminated voltage, the type of the power grid is the 220V voltage of three-phase and four-line；
If the second voltage is less than the predeterminated voltage, the type of the power grid is the 57.7V electricity of the three-phase and four-line
Pressure.
3. the power grid type judgement method of three-phase electric energy meter according to claim 1, which is characterized in that described according to
The size of second angle and/or the size of the tertiary voltage determine the type of the power grid, comprising:
Judge second angle whether in the second predetermined angle threshold value；
If second angle, in second predetermined angle threshold value, the type of the power grid is the 100V of phase three-wire three
Voltage；
If second angle not in second predetermined angle threshold value, judges whether second angle is pre- in third
If in angle threshold；
If second angle in the third predetermined angle threshold value, judges whether the tertiary voltage is greater than default electricity
Pressure；
If the tertiary voltage is greater than the predeterminated voltage, the type of the power grid is the 220V voltage of three-phase and four-line；
If the tertiary voltage is less than the predeterminated voltage, the type of the power grid is the 57.7V electricity of the three-phase and four-line
Pressure.
4. the power grid type judgement method of three-phase electric energy meter according to claim 2, which is characterized in that described first is default
Angle threshold is 110 degree to 130 degree.
5. the power grid type judgement method of three-phase electric energy meter according to claim 3, which is characterized in that described second is default
Angle threshold is 290 degree to 310 degree, and the third predetermined angle threshold value is 230 degree to 250 degree.
6. a kind of power grid kind judging device of three-phase electric energy meter, which is characterized in that described device includes:
Sample circuit, for acquiring the angle of network voltage and the network voltage, the network voltage includes first voltage,
Two voltages and tertiary voltage, the angle of the network voltage include the first angle of the first voltage and the second voltage,
And the second angle of the first voltage and the tertiary voltage；
Master control chip, for judging whether the voltage of the first phase line is the first voltage；If the electricity of first phase line
Pressure is the first voltage, then judges whether the voltage of third phase line is the tertiary voltage；If the electricity of the third phase line
Pressure is the tertiary voltage, then judges whether the voltage of the second phase line is the second voltage；If the electricity of second phase line
Pressure is the second voltage, then the type of power grid is determined according to the size of the size of first angle and the second voltage；
If the voltage of second phase line is not the second voltage, according to the size and/or the third of second angle
The size of voltage determines the type of the power grid.
7. the power grid kind judging device of three-phase electric energy meter according to claim 6, which is characterized in that the master control coremaking
Piece is specifically used for:
Judge first angle whether in the first predetermined angle threshold value；
If first angle in first predetermined angle threshold value, judges whether the second voltage is greater than default electricity
Pressure；
If the second voltage is greater than the predeterminated voltage, the type of the power grid is the 220V voltage of three-phase and four-line；
If the second voltage is less than the predeterminated voltage, the type of the power grid is the 57.7V electricity of the three-phase and four-line
Pressure.
8. the power grid kind judging device of three-phase electric energy meter according to claim 6, which is characterized in that the master control coremaking
Piece is specifically used for:
Judge second angle whether in the second predetermined angle threshold value；
If second angle, in second predetermined angle threshold value, the type of the power grid is the 100V of phase three-wire three
Voltage；
If second angle not in second predetermined angle threshold value, judges whether second angle is pre- in third
If in angle threshold；
If second angle in the third predetermined angle threshold value, judges whether the tertiary voltage is greater than default electricity
Pressure；
If the tertiary voltage is greater than the predeterminated voltage, the type of the power grid is the 220V voltage of three-phase and four-line；
If the tertiary voltage is less than the predeterminated voltage, the type of the power grid is the 57.7V electricity of the three-phase and four-line
Pressure.
9. the power grid kind judging device of three-phase electric energy meter according to claim 6, which is characterized in that further include metering core
The angle of piece, the network voltage and the network voltage for acquiring the sample circuit is converted into number by analog form
Font formula.
10. a kind of power grid type of three-phase electric energy meter judges system, which is characterized in that including described in any one of claim 6 to 9
The power grid kind judging device of three-phase electric energy meter further includes power network wiring terminal, and the power network wiring terminal includes phase three-wire three
Or three-phase and four-line, wherein three lines, three line is arranged successively according to the first phase line, sky, third phase line and the second phase line, and described three
Four line of phase is arranged successively according to first phase line, second phase line, the third phase line and ground wire.
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