CN219039340U - Wireless communication's measurement trouble intelligent recognition appearance - Google Patents
Wireless communication's measurement trouble intelligent recognition appearance Download PDFInfo
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- CN219039340U CN219039340U CN202223279466.9U CN202223279466U CN219039340U CN 219039340 U CN219039340 U CN 219039340U CN 202223279466 U CN202223279466 U CN 202223279466U CN 219039340 U CN219039340 U CN 219039340U
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Abstract
The application discloses wireless communication's measurement trouble intelligent recognition appearance includes: a housing; and a processor disposed in the housing, the processor including: the communication unit is used for receiving the operation data of the intelligent electric energy meter; the data analysis unit is connected with the communication unit and is used for determining the fault type of the intelligent electric energy meter according to the operation data received by the communication unit, wherein the fault type comprises a current unbalance fault and/or a wiring fault; the output unit is connected with the data analysis unit and is used for outputting fault types and operation data; the display screen is arranged on the shell, connected with the processor and used for displaying fault types and operation data output by the processor. The identification instrument can automatically judge the fault type of the intelligent electric energy meter by operating data of the intelligent electric energy meter, improves the dependence on the technical level of staff, improves the accuracy of the judging result, and ensures the safe operation.
Description
Technical Field
The application relates to the technical field of intelligent electric energy meters, in particular to a metering fault intelligent identifier for wireless communication.
Background
The electric power becomes an important energy source which is indispensable for the life and development progress of the modern society, not only brings light to people, but also promotes the progress of modern production and modern technology, and plays an important role in the development of social economy. The power metering system is an important component of the power system and is related to the equal trade between the power consumer and the power supply department. Whether the power metering equipment (such as an intelligent electric energy meter) fails directly influences the accuracy of the detection data.
At present, in the fault discrimination process aiming at the intelligent electric energy meter, workers are usually required to measure data such as current and voltage of each phase on site through equipment such as meter installation and power connection, measuring instruments and the like, the fault discrimination accuracy is influenced by the professional skill level and practical working experience of related technicians, and the obtained detection result and analysis result accuracy are lower due to uneven skill level of detection personnel, and great potential safety hazards exist in the detection process.
Disclosure of Invention
In view of this, the application provides a wireless communication's measurement trouble intelligent recognition appearance main aim at solves the analysis result degree of accuracy of current intelligent ammeter miswiring not high, and has the technical problem of potential safety hazard.
According to one aspect of the present application, there is provided a metering fault intelligent recognition instrument for wireless communication, comprising:
a housing;
and a processor disposed in the housing, the processor including:
the communication unit is used for receiving the operation data of the intelligent electric energy meter;
the data analysis unit is connected with the communication unit and is used for determining the fault type of the intelligent electric energy meter according to the operation data received by the communication unit, wherein the fault type comprises a current unbalance fault and/or a wiring fault;
the output unit is connected with the data analysis unit and is used for outputting fault types and operation data;
the display screen is arranged on the shell, connected with the processor and used for displaying fault types, operation data and operation data output by the processor.
Optionally, the wiring mode of the intelligent electric energy meter comprises three-phase four-wire; a data analysis unit comprising:
the first determining module is used for determining a zero line current measured value of the intelligent electric energy meter according to the operation data;
and the first fault module is used for determining that the fault type is a current unbalance fault if the ratio of the difference value between the zero line current measured value and the zero line current acquisition value to the zero line current acquisition value exceeds a preset ratio threshold value.
Optionally, the first determining module is specifically configured to determine a three-phase voltage phasor according to voltage phase sequence data in the operation data;
determining three-phase undetermined element angle data according to the voltage phasors and the power factors in the operation data through an inverse cosine function, wherein the undetermined element angle data are combinations of two element angle data with equal values and opposite directions;
screening element angle data with matched directions from the undetermined element angle data to obtain three-phase angle data;
determining a three-phase current phasor according to the phase angle data;
the vector sum of the three phase currents is determined as the zero line current measurement.
Optionally, the data analysis unit includes:
the generating module is used for generating a target phasor diagram of the intelligent electric energy meter according to the operation data;
the second determining module is used for determining a voltage access mode of each element of the intelligent electric energy meter and a current access mode of each element according to the load characteristic and the target phasor diagram of the intelligent electric energy meter;
and the second fault module is used for determining that the fault type is a wiring fault if the voltage access mode is different from the preset voltage wiring mode of the intelligent electric energy meter and/or the current access mode is different from the preset current wiring mode of the intelligent electric energy meter.
Optionally, the generating module is specifically configured to determine a voltage phasor of each element according to the voltage phase sequence data in the operation data and the voltage value of each element;
calculating the phase angle value of each element according to the power factor of each element in the operation data;
determining the phase angle direction of each element according to the active power and the reactive power of each element in the operation data;
calculating the position relation and angle between the voltage phasor and the current phasor of each element according to the phase angle value and the phase angle direction of each element;
determining the current phasors of each element according to the position relation and angle between the voltage phasors and the current phasors of each element and the current value of each element in the operation data;
and generating a target phasor diagram according to the voltage phasor of each element and the current phasor of each element.
Optionally, the second determining module is specifically configured to obtain, according to a load characteristic of the intelligent electric energy meter, a theoretical positional relationship and an angle between a current phasor of each element and a phase voltage of the intelligent electric energy meter;
according to the theoretical position relationship and the angle, determining a first corresponding relationship between the phase voltage and the voltage of the intelligent electric energy meter in the target phasor diagram and a second corresponding relationship between the current phasor and the current of each element;
And determining a voltage access mode and a current access mode according to the first corresponding relation and the second corresponding relation.
Optionally, the second determining module is specifically configured to determine, if the wiring manner of the three-phase metering device includes three phases and three lines, a target angle between current phasors in a rotation direction of the first rotation angle range in the target phasor diagram and phase voltages whose voltage phases are a-phase voltage and c-phase voltage, respectively;
if the wiring mode of the three-phase metering equipment comprises three-phase four wires, determining target angles between current phasors and phase voltages of which the voltages are a-phase voltage, b-phase voltage and c-phase voltage along the rotation direction of the first rotation angle range in the target phasor diagram;
and if the target angle corresponding to the current phasor is positioned in the first rotation angle range of the phase voltage, determining a second corresponding relation between the current phasor and the current phase according to the voltage phase of the phase voltage corresponding to the target angle.
Optionally, the first rotation angle range includes a positive polarity rotation angle range and a negative polarity rotation angle range; the second determining module is used for determining that the current phasor lags the phase voltage corresponding to the target angle and is positive if the target angle corresponding to the current phasor is located in the positive polarity rotation angle range of the phase voltage;
If the target angle corresponding to the current phasor is located in the negative polarity rotation angle range of the phase voltage, determining that the current phasor lags behind the phase voltage corresponding to the target angle and is negative.
Optionally, if the wiring mode of the intelligent electric energy meter includes three phases and three lines, the second determining module is specifically configured to determine that the phase voltage is the b-phase voltage if the current phasor does not exist in the second rotation angle range associated with the load power factor angle in the target phasor diagram;
if the phase voltage is located in the clockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is the c-phase voltage;
if the phase voltage is located in the anticlockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is the a-phase voltage.
Optionally, if the wiring mode of the intelligent electric energy meter includes three-phase four-wire, the second determining module is specifically configured to determine a phase voltage equivalent to a phase in the target phasor diagram as a phase voltage;
if the phase voltage is located in the clockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the b-phase voltage;
if the phase voltage is located in the anticlockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the c-phase voltage.
Optionally, the data analysis unit is specifically configured to determine the fault type according to the operation data if the operation data received by the communication unit exceeds a preset data range.
By means of the technical scheme, the intelligent fault metering and identifying instrument comprises a shell, a processor and a display screen. The processor is provided with a communication unit, a data analysis unit and an output unit. The data analysis unit can determine whether the fault type of the intelligent electric energy meter is a current unbalance fault or a wiring fault according to the operation data of the intelligent electric energy meter received by the communication unit. And the analyzed fault types are transmitted to the display screen through the output unit, so that a user can timely acquire a fault line analysis result. Through this measurement trouble intelligent recognition appearance can realize carrying out automatic judgement to intelligent ammeter's trouble type through intelligent ammeter operation data, has improved the dependence to staff's technical level when need not the staff to read relevant data reduction manpower consumption to improved the rate of accuracy of judgement result, guaranteed the safety of operation and gone on, and the detection of multiple trouble such as electric current unbalance trouble and wiring trouble can be realized to an equipment, the range of application of measurement trouble intelligent recognition appearance has been enlarged, helps reducing fault detection cost.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 shows one of schematic structural diagrams of a wireless communication metering fault intelligent recognition instrument according to an embodiment of the present application;
fig. 2 shows a second schematic structural diagram of a wireless communication metering fault intelligent recognition instrument according to an embodiment of the present application;
FIG. 3 shows a schematic diagram of a processor according to an embodiment of the present application;
fig. 4 shows a voltage phasor diagram of a three-phase three-wire intelligent electric energy meter provided in an embodiment of the present application;
FIG. 5 shows a target phasor diagram of a three-phase three-wire intelligent ammeter provided in an embodiment of the present application
Fig. 6 shows a target phasor diagram of a three-phase four-wire intelligent electric energy meter according to an embodiment of the present application.
Reference numerals:
10 housings, 20 processors, 30 display screens, 101 power interfaces, 102 user interfaces, 103 network interfaces, 201 communication units, 202 data analysis units, 203 output units.
Detailed Description
The present application will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly fused. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.
In this embodiment, a wireless communication metering fault intelligent recognition instrument is provided, as shown in fig. 1 and fig. 3, and the metering fault intelligent recognition instrument includes: a housing 10, a processor 20 and a display screen 30.
Specifically, the processor 20 is disposed in the housing 10, and the processor 20 includes: a communication unit 201, a data analysis unit 202, and an output unit 203. Wherein, the communication unit 201 is configured to receive operation data of the intelligent ammeter. The data analysis unit 202 is connected to the communication unit 201, and the data analysis unit 202 is configured to determine a fault type of the intelligent ammeter according to the operation data received by the communication unit 201, where the fault type includes a current imbalance fault and/or a wiring fault. The output unit 203 is connected to the data analysis unit 202, and the output unit 203 is configured to output fault types and operation data. The display screen 30 is disposed on the housing 10 and connected to the processor 20, and the display screen 30 is used for displaying fault types and operation data output by the processor 20.
In this embodiment, the data analysis unit 202 can determine whether the fault type of the smart electric energy meter is a current unbalance fault or a wiring fault according to the operation data of the smart electric energy meter received by the communication unit 201. The analyzed fault type is transmitted to the display screen 30 through the output unit 203, so that a user can know the fault analysis result in time. On the one hand, through the metering fault intelligent recognition instrument, the fault type of the intelligent electric energy meter can be automatically judged through the operation data of the intelligent electric energy meter, the dependence on the technical level of staff is improved while the manpower consumption is reduced without the need of the staff to read related data, so that the accuracy of a judging result is improved, and the safe operation is ensured. On the other hand, the intelligent metering fault identifier can accurately detect current unbalance faults or wiring faults, is beneficial to expanding the application range of the intelligent metering fault identifier, and avoids the limitation of a special fault detection device.
It should be noted that the operation data includes, but is not limited to, at least one of the following: voltage value, current value, voltage phase sequence, power factor, active power, reactive power.
Optionally, as shown in fig. 2, the intelligent meter for metering faults further comprises a power interface 101, a user interface 102 and a network interface 103. The user interface 102 may also include a USB interface, a card reader interface, and the like. The network interface 103 may optionally include a standard wired interface (infrared communication interface, RS485 communication interface), a wireless interface (e.g., bluetooth interface, WI-FI interface), etc. Further, the intelligent fault measuring and identifying instrument can be provided with a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, an input unit and the like according to requirements.
Further, in the low-voltage distribution network, three-phase four-wire system is mostly adopted, wherein three lines are respectively a, b and c three phases, and the other line is a neutral line, namely a zero line. During the power distribution process, three-phase current imbalance often occurs, and causes of the phenomenon include asymmetric load, split-current power theft or current loss faults, and the three are basically identical in data expression form. Because the shunt power theft or the current loss fault brings serious benefit loss to the power enterprises and wastes a lot of electric energy resources, the resource compensation is needed for the power loss caused by the shunt power theft or the current loss fault. Based on this, when the three-phase current imbalance phenomenon occurs, it is necessary to determine the cause of the current imbalance. Therefore, in the case that the wiring manner of the intelligent electric energy meter includes three-phase four-wire, as refinement and expansion of the specific implementation manner of the above embodiment, for completely describing the specific implementation process of the embodiment, the data analysis unit includes: a first determination module and a first failure module.
Specifically, the first determining module is used for determining a zero line current measured value of the intelligent electric energy meter according to the operation data; the first fault module is used for determining that the fault type is a current unbalance fault if the ratio of the difference value between the zero line current measured value and the zero line current acquisition value to the zero line current acquisition value exceeds a preset ratio threshold.
The alternating current is changed according to a sine rule with time, so that vector addition is required to be performed in consideration of the current direction when calculating the sum of three-phase current data, and the vector sum of the three-phase current is equal to the zero line current, and therefore, the zero line current measured value is the vector sum of the three-phase current. The zero line current measured value is used for representing a zero line current theoretical value obtained by calculation based on the collected three-phase electric power metering data, and the non-low-voltage three-phase direct access type intelligent electric energy meter is displayed.
It is appreciated that the current imbalance fault may be further categorized as a metering loss of current fault or a shunt theft of current fault. The wiring faults can be divided into voltage misconnection, current misconnection, voltage transformer polarity reversal connection, current transformer polarity reversal connection and the like.
In this embodiment, the zero line current measurement value (i.e., the zero line current theoretical value obtained by calculation according to the operation data) is differentiated from the zero line current collection value (i.e., the zero line current actual value collected by the low-voltage three-phase direct access intelligent electric energy meter), the ratio between the obtained difference value and the zero line current collection value is compared with a preset ratio threshold value, and if the ratio exceeds the preset ratio threshold value, the measurement loss fault or the shunt power theft fault is determined. Therefore, the automatic judgment of the current unbalance faults is realized, the dependence on the technical level of staff is improved, the accuracy of the judgment result is improved, and the safe operation is ensured.
Exemplary, the preset ratio threshold is set to 0.15, and the three-phase current phasors of a, b and c are respectively expressed as
Zero line current measurement is denoted +.>
The zero line current acquisition value is expressed as +.>
When (when)
In this case, a current imbalance fault or a shunt power theft fault is determined.
In an actual application scene, determining the zero line current measurement value of the intelligent electric energy meter specifically comprises the following steps: determining three-phase voltage phasors according to the voltage phase sequence data in the operation data; determining three-phase undetermined element angle data according to the voltage phasors and the power factors in the operation data through an inverse cosine function, wherein the undetermined element angle data are combinations of two element angle data with equal values and opposite directions; screening element angle data with matched directions from the undetermined element angle data to obtain three-phase angle data; determining a three-phase current phasor according to the phase angle data; the vector sum of the three phase currents is determined as the zero line current measurement.
Illustratively, taking the a-phase as an example, a phasor diagram of the three-phase voltage is first determined based on the voltage phase sequence data, and the three-phase voltage phasors are further determined. Based on the power factor data x of phase a 1 Obtaining angle data of a-phase undetermined element through inverse cosine function 
It will be appreciated that the pending element angle data obtained here is a combination of two element angle data of equal value and opposite direction. It is necessary to combine the power data of phase a (including active power P a Direction of and reactive power Q a Further screening out direction-matching element angle data, i.e. phase angle data of phase a (i.e. phase a current phasors +.>
Hysteresis U a Angle of a) to determine the current phasor data for phase a. Specifically, (1) suppose P a >0，Q a >0, then->
According to->
Advancing
Angle-determining current phasor data +.>
(2) Let P be a <0，Q a >0, then
According to->
Advance->
Angle-determining current phasor data +.>
(3) Let P be a <0，Q a <0, then->
The lead angle is {360 DEG + [ -arccos (x) 1 )]According to->
Advance->
Angle-determining current phasor data +.>
(4) Let P be a >0，Q a <0, then->
The lead angle is {360 DEG + [ -arccos (x) 1 )]According to->
Advance->
Angle-determining current phasor data +.>
Similarly, the current phasor data of b phase and c phase are calculated and determined +.>
And +.>
Finally, the three-phase current data vectors of a, b and c are added to obtain zero line current measurement value +.>
It will be appreciated that after determining that a current imbalance fault has occurred, the processor may also account for the metered loss of current data and invoke the power boost thread to boost the loss of current power resources based on the power boost thread. Thereby ensuring fair transaction between the electricity consumer and the power enterprise.
For example, an additional thread may be preset, and when it is determined that the current imbalance caused by the metering current loss fault or the shunt current theft is determined, the corresponding additional thread is called to supplement the lost power resource.
Further, as a refinement and extension of the specific implementation of the above embodiment, for fully describing the specific implementation process of the present embodiment, the data analysis unit includes: the system comprises a generating module, a second determining module and a second fault module.
Specifically, the generating module is used for generating a target phasor diagram of the intelligent electric energy meter according to the operation data. The second determining module is used for determining a voltage access mode of each element of the intelligent electric energy meter and a current access mode of each element according to the load characteristic and the target phasor diagram of the intelligent electric energy meter. The second fault module is used for determining that the fault type is a wiring fault if the voltage access mode is different from the preset voltage wiring mode of the intelligent electric energy meter and/or the current access mode is different from the preset current wiring mode of the intelligent electric energy meter.
In this embodiment, the operational data is used to generate a target phasor diagram for the smart power meter. In the generated target phasor diagram of the intelligent electric energy meter, according to the load characteristics, the voltage access mode of each element and the current access mode of each element can be determined. If the voltage access mode is detected to be different from the preset voltage connection mode of the known intelligent electric energy meter, or the current access mode is detected to be different from the preset current connection mode of the known intelligent electric energy meter, the problem of misconnection of the intelligent electric energy meter is solved. Therefore, accurate research and judgment on the type of wrong wiring of the intelligent electric energy meter are realized, manual testing is not needed, accuracy of a judgment result is improved, and meanwhile, safety risks of operation are avoided.
It should be noted that, under different wiring modes, the voltage and current of the intelligent electric energy meter have uniform and correct wiring modes. Specifically, for a three-phase three-wire intelligent electric energy meter, the correct wiring condition is that the voltage wiring condition is that the phase voltage
For a phase voltage +.>
Phase voltage->
For b-phase voltage->
Phase voltage->
For c-phase voltage->
The current connection being the current of the first element
Access->
Current of the second element->
Access->
I.e. firstElement voltage->
Access->
Current->
Access->
Second element voltage->
Access->
Current->
Access->
Under the wiring state, the three-phase three-wire intelligent electric energy meter can accurately measure. When the actual wiring condition of voltage or current is inconsistent with the correct wiring, the three-phase three-wire intelligent electric energy meter belongs to wrong wiring, and the measurement of the three-phase three-wire intelligent electric energy meter is incorrect under the wrong wiring state, so that the measurement is misaligned. For the three-phase four-wire intelligent electric energy meter, under the correct wiring, the voltage access condition is as follows: phase voltage->
For a phase voltage +.>
Phase voltage->
For b-phase voltage->
Phase voltage->
For c-phase voltage->
The current access condition is: the current connection is the current of the first element +.>
Access->
Current of the second element->
Access->
Current ∈of the third element >
Access->
I.e. first element voltage->
Access->
Current->
Access->
Second element voltage->
Access->
Current->
Access->
Third element voltage->
Access->
Current->
Access->
Under this wiring state, three-phase four-wire intelligent ammeter can correct the measurement. And the wiring inconsistent with the correct wiring belongs to wrong wiring, and the three-phase four-wire intelligent ammeter under the wrong wiring state is incorrectly measured, so that misalignment is caused.
In an actual application scene, generating a target phasor diagram of the intelligent electric energy meter specifically comprises: determining the voltage phasor of each element according to the voltage phase sequence data in the operation data and the voltage value of each element; calculating the phase angle value of each element according to the power factor of each element in the operation data; determining the phase angle direction of each element according to the active power and the reactive power of each element in the operation data; calculating the position relation and angle between the voltage phasor and the current phasor of each element according to the phase angle value and the phase angle direction of each element; determining the current phasors of each element according to the position relation and angle between the voltage phasors and the current phasors of each element and the current value of each element in the operation data; and generating a target phasor diagram according to the voltage phasor of each element and the current phasor of each element.
In the embodiment, a voltage phasor diagram is generated according to the read related data of the voltage in the intelligent electric energy meter operation data, the phase angle of each element is obtained by calculating an inverse cosine function according to the power factor value of each element in the intelligent electric energy meter operation data, the current phasor of each element is determined by combining the directions of the active power and the reactive power of each element, and finally the current phasor is added in the voltage phasor diagram to obtain the target phasor diagram of the intelligent electric energy meter.
For example, an intelligent electric energy meter with three-phase three-wire connection mode is selected, the voltage specification is 3×100V, the current specification is 3×1.5 (6) a, and the operation data are shown in table 1. As the voltage phase sequence of the three-phase three-wire intelligent electric energy meter is measured to be the positive phase sequence, and the voltage value of each element is measured, the voltage phasor diagram for determining the positive phase sequence according to the voltage phasors is shown in fig. 4. The acquired operation data of the three-phase three-wire intelligent electric energy meter and the generated voltage phasor diagram are taken as references, and the current phasor of the first element is calculated
The method comprises the following specific steps: first, first element +.>
Phase angle value:
from the active power pa=7.22 > 0 of the first element and the reactive power qa= -25.50 < 0 of the first element, the phase angle of the first element is known +. >
The lead angle of the first element is thus found to be 360+(-73 °) =287°, whereby +.>
The voltage phasor of the first component is therefore +.>
Leading current phasor I 1 Is 287 deg.; further calculating the current phasor of the second element therein>
The method comprises the following specific steps: first, the phase angle value of the second element is calculated: />
From the active power Pc= -17.59 < 0, qc= -18.51 < 0 of the second element, the phase angle of the second element is known +.>
The lead angle of the second element is thus 360 ° + (-133 °) =227°, whereby +_ is obtained>
The voltage phasor of the second component is therefore +.>
Current phasor leading the second element>
Is 227 deg.. According to the calculation process, the current phasors of each element can be obtained, and then the current phasors of each element are added into the generated voltage phasor diagram, so that the three-phase three-wire intelligent electric energy meter phasor diagram is obtained as shown in fig. 5. />
TABLE 1
Further, as refinement and expansion of the specific implementation manner of the above embodiment, in order to fully describe the specific implementation process of the embodiment, the second determining module is specifically configured to obtain, according to the load characteristic of the intelligent electric energy meter, a theoretical positional relationship and an angle between the current phasor of each element and the phase voltage of the intelligent electric energy meter; according to the theoretical position relationship and the angle, determining a first corresponding relationship between the phase voltage and the voltage of the intelligent electric energy meter in the target phasor diagram and a second corresponding relationship between the current phasor and the current of each element; and determining a voltage access mode of each element and a current access mode of each element according to the first corresponding relation and the second corresponding relation.
In this embodiment, after the target phasor diagram is obtained, a theoretical positional relationship and an angle between the current phasor of each element and the phase voltage of the intelligent electric energy meter are determined according to the load characteristic, and a first corresponding relationship between the phase voltage and the voltage of the intelligent electric energy meter in the target phasor diagram and a second corresponding relationship between the current phasor of each element and the current phase of the intelligent electric energy meter are respectively identified according to the theoretical positional relationship and the angle. And determining the voltage access mode of each element under the actual wiring condition through the first corresponding relation, and determining the current access mode of each element under the actual wiring condition through the second corresponding relation.
In an actual application scene, determining a first corresponding relation between phase voltage and voltage of the intelligent electric energy meter in the target phasor diagram and a second corresponding relation between current phasors and current of each element, wherein the first corresponding relation comprises the following modes:
in a first mode, identifying a lag angle of a current phasor relative to a phase voltage in a target phasor diagram; and determining a second corresponding relation between the current phasor and the current phase of each element according to the hysteresis angle and the phase voltage corresponding to the hysteresis angle.
For example, since the hysteresis angle between the current phasor and the phase voltage is fixed in the case of a correct wiring. Thus, the current access condition can be analyzed through the hysteresis angle. Based on the operation data of the three-phase three-wire intelligent electric energy meter and the generated phasor map, the method in the embodiment is characterized in that 
＝30The voltage phase sequence is a positive phase sequence, and the load characteristic is obtained from the load characteristic and is inductive 0-30 degrees, so that the current phasor of the element of the intelligent electric energy meter lags by 0-30 degrees. As can be seen from FIG. 5, ->
Hysteresis phase Voltage->
About 17 DEG, can judge->
And->
Current voltage for the same phase, +.>
Hysteresis phase Voltage->
About 17 DEG, can judge->
And->
Current voltage of the same phase, but +.>
No corresponding current, +.>
For b-phase voltage, judging +.>
For c-phase voltage, ">
For a phase voltage>
Is->
Is->
Further, the miswiring condition of each element in the three-phase three-wire intelligent ammeter in the embodiment is obtained, wherein the phase voltage +.>
For a phase voltage +.>
Phase voltage->
For b-phase voltage
Phase voltage->
For c-phase voltage->
The voltage of the first element is applied ∈ ->
Current of the first element->
Access->
Second element voltage switch-in->
Current of the second element->
Access->
And analyzing the fault wiring of each element in the three-phase three-wire intelligent electric energy meter to obtain the fault wiring type of the intelligent electric energy meter.
If the wiring mode of the intelligent electric energy meter comprises three phases and three lines, determining target angles between current phasors in the rotation direction of the first rotation angle range in the target phasor diagram and phase voltages of which the voltages are a-phase voltage and c-phase voltage respectively; if the wiring mode of the intelligent electric energy meter comprises three-phase four wires, determining target angles between current phasors and phase voltages of which the voltages are a-phase voltage, b-phase voltage and c-phase voltage along the rotation direction of the first rotation angle range in the target phasor diagram; and if the target angle corresponding to the current phasor is positioned in the first rotation angle range of the phase voltage, determining a second corresponding relation between the current phasor and the current phase according to the voltage phase of the phase voltage corresponding to the target angle.
Wherein the first rotation angle range is associated with a load power factor angle, and the first rotation angle ranges corresponding to different load power factor angles may be the same or different. The first rotation angle range includes a positive polarity rotation angle range and a negative polarity rotation angle range. For example, the load power factor angle is sensibility 0 ° to 60 °, then the first rotation angle range includes positive polarity rotation angle range clockwise 0 ° to 60 ° and negative polarity rotation angle range clockwise 180 ° to 240 °; the load power factor angle is inductive 60-90 degrees, and the first rotation angle range comprises a positive polarity rotation angle range of 60-90 degrees clockwise and a negative polarity rotation angle range of 240-270 degrees clockwise; the load power factor angle is capacitive 0-60 degrees, and the first rotation angle range comprises 300-360 degrees clockwise in the positive polarity rotation angle range and 120-180 degrees clockwise in the negative polarity rotation angle range; the load power factor angle is sensibility 60-90 degrees, and the first rotation angle range comprises a clockwise positive polarity rotation angle range 270-300 degrees and a negative polarity rotation angle range 90-120 degrees.
In this embodiment, if the wiring scheme of the three-phase metering device includes three phases and three lines, only the current phasors in the first rotation angle range based on the phase voltage of the a phase and the phase voltage of the c phase need to be analyzed, so as to determine the second correspondence relationship between the current phasors and the current phases. Similarly, if the wiring mode of the three-phase metering device includes three-phase four-wire, it is necessary to analyze the current phasors in the first rotation angle range of the phase voltage based on the phase voltage of the a-phase, the phase voltage of the b-phase and the phase voltage of the c-phase, so as to determine the second correspondence relationship between the current phasors and the current phases.
It may be appreciated that if the target angle corresponding to the current phasor is located within the first rotation angle range of the phase voltage, determining the second correspondence between the current phasor and the current phase according to the voltage phase of the phase voltage corresponding to the target angle includes: if the target angle corresponding to the current phasor is located in the positive polarity rotation angle range of the phase voltage, determining that the current phasor lags behind the phase voltage corresponding to the target angle and is positive polarity, and indicating that the target angle between the phase voltage and the current phasor meets the positive polarity condition in the first rotation angle range, correspondingly lags behind the phase voltage and is positive polarity current phase. If the target angle corresponding to the current phasor is located in the negative rotation angle range of the phase voltage, determining that the phase voltage corresponding to the current phasor lags behind the target angle and is negative, wherein the target angle between the phase voltage and the current phasor accords with the negative condition of the first rotation angle range, and the current phasor corresponds to the lagged phase voltage and is negative current phase.
(1) Taking three-phase three-wire and load characteristics as inductance 0-60 degrees as an example, the corresponding first rotation angle ranges are clockwise 0-60 degrees and 180-240 degrees. Such as 
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
(2) Taking three-phase three-wire and load characteristics as inductance 60-90 degrees as an example, the corresponding first rotation angle ranges are 60-90 degrees clockwise and 240-270 degrees. Such as
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation within the range of 240-270 degrees exists 
Then->
Is->
(3) Taking three-phase three-wire and load characteristics as capacitive 0-60 degrees as an example, the corresponding first rotation angle ranges are 300-360 degrees clockwise and 120-180 degrees. Such as
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation within the range of 300-360 degrees exists
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is that
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
(4) Taking three-phase three-wire and load characteristics as capacitive 60-90 degrees as an example, the corresponding first rotation angle ranges from 270-300 degrees and 90-120 degrees clockwise. Such as
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees >
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
Such as
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
(5) Taking three-phase four-wire and load characteristics as inductance 0-60 degrees as an example, the corresponding first rotation angle ranges are clockwise 0-60 degrees and 180-240 degrees. Such as
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is that
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is that
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example- >
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is that
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation 180-240 degrees exists/>
Then->
Is->
For example->
Clockwise rotation is within the range of 0-60 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 180-240 degrees, and there is +.>
Then->
Is that
(6) Taking three-phase four-wire and load characteristics as inductance 60-90 degrees as an example, the corresponding first rotation angle ranges are 60-90 degrees clockwise and 240-270 degrees. Such as
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees >
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation within the range of 60-90 degrees exists
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 240-270 degrees>
Then->
Is->
Such as
Clockwise rotation is within the range of 60-90 degrees>
Then->
Is->
For example->
Clockwise rotation within the range of 240-270 degrees exists
Then->
Is->
(7) Taking three-phase four-wire and load characteristics as capacitive 0-60 degrees as an example, the corresponding first rotation angle ranges are 300-360 degrees clockwise and 120-180 degrees. Such as
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is that
For example->
Clockwise rotation is within the range of 300-360 degrees >
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
Such as
Clockwise rotation is within the range of 300-360 degrees>
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
For example->
Rotated 300 degrees clockwise to the maximumWithin 360 DEG there is->
Then->
Is->
For example->
Clockwise rotation is 120-180 degrees>
Then->
Is->
(8) Taking three-phase four-wire and load characteristics as capacitive 60-90 degrees as an example, the corresponding first rotation angle ranges are 270-300 degrees clockwise and 90-120 degrees. Such as
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation within the range of 270-300 degrees exists
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +. >
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is that
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation within the range of 90 DEG to 120 DEG exists
Then->
Is->
For example->
Clockwise rotation is in the range of 270-300 degrees>
Then->
Is->
For example->
Clockwise rotation is within the range of 90-120 degrees and there is +.>
Then->
Is->
By way of example, as shown in figure 5,
is positioned at->
Clockwise within 0-60 degrees, the second corresponding relation: />
Is that
Is positioned at->
Clockwise within 0-60 degrees, the second corresponding relation: />
Is->
Thus, the current access mode is that 
Lag phase a and positive polarity,>
the lag phase c is positive, which is consistent with the known current connection mode, namely, the current has no abnormal connection. As shown in fig. 6, ->
Is positioned at->
Clockwise within 0-60 degrees, the second corresponding relation: />
Is->
Is positioned at->
Within 180-240 degrees clockwise, the second corresponding relationship: />
Is->
Is positioned at->
Within 180-240 degrees clockwise, the second corresponding relationship: />
Is->
The current access mode is->
Hysteresis phase c and positive polarity,>
lag phase a and be negative, ">
The lag phase b is of negative polarity, which is different from the known current connection mode, namely, the current three wires are connected in a staggered way, and the two wires are connected in a reversed way.
In an actual application scene, under the condition of three phases and three lines, determining a first corresponding relation between phase voltage and voltage of the intelligent electric energy meter in the target phasor diagram according to the theoretical position relation and angle, specifically including: if the phase voltage in the target phasor diagram does not have current phasors in a second rotation angle range related to the load power factor angle, determining the phase voltage as b-phase voltage; if the phase voltage is located in the clockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is the c-phase voltage; and if the phase voltage is located in the anticlockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is the a-phase voltage.
Wherein the second rotation angle range is associated with a load characteristic, and the second rotation angle ranges corresponding to different load characteristics may be the same or different. For example, the load characteristic is from about 0 ° to about 60 °, then the second rotation angle range includes from about 0 ° to about 60 ° clockwise and from about 180 ° to about 240 ° clockwise; the load characteristic is inductive 60-90 degrees, and the second rotation angle range comprises clockwise 60-90 degrees and clockwise 240-270 degrees; the load characteristic is capacitive 0-60 degrees, and the second rotation angle range comprises 300-360 degrees clockwise and 120-180 degrees clockwise; the load characteristic is capacitive 60 deg. -90 deg., then the second rotation angle range includes 270 deg. -300 deg. clockwise and 90 deg. -120 deg. clockwise.
In this embodiment, in the case of the three-phase three-wire metering apparatus, whether the positive phase sequence or the negative phase sequence, after the phase voltage whose voltage phase is the b-phase is located by the positional relationship between the phase voltage and the current phasors in the target phasor diagram, the actual voltage phase of the other phase voltages except for the phase voltage corresponding to the b-phase voltage is located with the b-phase voltage as a reference. So as to judge whether the voltage wiring is abnormal or not by using the phase voltage and the actual voltage, and simultaneously, the abnormal problem can be positioned to the abnormal wiring terminal.
Illustratively, the load power factor angle is inductive 0 deg. to 60 deg. for example. If equivalent to
The voltage of a certain phase in the (B) is clockwise rotated by 0-60 degrees and 180-240 degrees without +.>
Or->
The phase voltage is +.>
In FIG. 5 +.>
Clockwise rotation is not carried out within the range of 0-60 degrees and 180-240 degrees>
Or->
Namely->
For b-phase voltage>
A voltage of 120 ° rotated clockwise>
For c-phase voltage, ">
The voltage rotated 120 ° clockwise is the a-phase voltage. Thus, the actual first correspondence relationship between the phase voltage and the voltage, which is analyzed by the positional relationship in fig. 5, is: />
Correspond to->
Correspond to->
Correspond to->
The method is not consistent with the known voltage wiring mode, namely wiring abnormality occurs in three-phase voltages.
In an actual application scene, under the condition of three-phase four-wire, determining a first corresponding relation between the phase voltage and the voltage of the intelligent electric energy meter in the target phasor diagram according to the theoretical position relation and the angle, wherein the first corresponding relation specifically comprises the following steps: determining a phase voltage equivalent to a phase a in the target phasor diagram as a phase a voltage; if the phase voltage is located in the clockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the b-phase voltage; and if the phase voltage is located in the anticlockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the c-phase voltage.
In this embodiment, in the case of a three-phase four-wire metering device, the phase voltage at phase a, which is known in the default mode of connection, is the phase voltage a. After the phase voltage corresponding to the a phase voltage is determined, the phase voltages of the b phase and the c phase are respectively positioned by taking the phase voltage corresponding to the a phase as a reference. So as to judge whether the voltage wiring is abnormal or not by using the phase voltage and the actual voltage, and simultaneously, the abnormal problem can be positioned to the abnormal wiring terminal.
Illustratively, the load characteristic is inductive 0 deg. to 60 deg. for example. Referring to the target phasor diagram of FIG. 6, the following will be made
(equivalent to the phase voltage of the a-phase) as a-phase voltage +.>
Phase voltage rotated clockwise by 120>
For b-phase voltage->
Phase voltage rotated clockwise by 120>
For c-phase voltage->
Thus, the actual first correspondence relationship between the phase voltage and the voltage, which is analyzed by the positional relationship in fig. 5, is: />
Correspond to->
Correspond to->
Correspond to->
The voltage is different from the preset voltage of the known wiring mode, namely, the b and c phase voltages have abnormal wiring.
Further, as a refinement and extension of the foregoing embodiment, for a complete description of a specific implementation procedure of the embodiment, the data analysis unit is specifically configured to determine, according to the operation data, the fault type if the operation data exceeds a preset data range.
In this embodiment, before the fault type is detected, whether the intelligent electric energy meter has a metering abnormality can be judged through the operation data and the preset data range, if the operation data is detected to exceed the preset data range, it is indicated that the intelligent electric energy meter does not meet the rules and logic relations which should be presented under different inductive and capacitive load characteristics, therefore, the abnormal operation of the intelligent electric energy meter can be determined, and the fault wiring type of the intelligent electric energy meter needs to be further judged. Therefore, the invalid judgment is avoided, and the judgment efficiency of the fault type is improved.
Specifically, the operation data exceeding the preset data range includes the following modes:
in a first mode, for a wiring fault, if the power data of the intelligent electric energy meter exceeds a preset power data range, the intelligent electric energy meter operates abnormally, wherein the power data comprises a total power factor and a power factor of each element in the intelligent electric energy meter.
In particular, if the total power factor is within the variation range of the total power factor,the power factor of each element is in the corresponding power factor variation range of each element, the sum of the power factors of each element is calculated, the ratio of the sum to the total power factor is calculated, the ratio is compared with a preset ratio, if the ratio is consistent with the preset ratio, the power data is in the preset power data range, otherwise, the power data exceeds the preset power data range; wherein, when the wiring mode of the intelligent electric energy meter is three-phase and three-wire, the preset ratio is 
When the wiring mode of the intelligent electric energy meter is three-phase four-wire, the preset ratio is 3.
The specific calculation of the logic relationship between the total power factor and each element of the three-phase three-wire intelligent electric energy meter can be realized by the following formula 1:
equation 1:
wherein, the liquid crystal display device comprises a liquid crystal display device,
a sum of power factors for each element; />
Is the total power factor.
The specific calculation of the logic relationship between the total power factor and each element of the three-phase four-wire intelligent electric energy meter can be realized by the following formula 2:
equation 2:
wherein, the liquid crystal display device comprises a liquid crystal display device,
a sum of power factors for each element; />
Is the total power factor.
In the second mode, for the current unbalance fault, if the voltage value of the intelligent electric energy meter is smaller than the preset error threshold value and the intelligent electric energy meter has load current (the load current is larger than 0), the intelligent electric energy meter operates abnormally.
Those skilled in the art will appreciate that the drawings are merely schematic illustrations of one preferred implementation scenario, and that the modules or flows in the drawings are not necessarily required to practice the present application. Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The foregoing application serial numbers are merely for description, and do not represent advantages or disadvantages of the implementation scenario. The foregoing disclosure is merely a few specific implementations of the present application, but the present application is not limited thereto and any variations that can be considered by a person skilled in the art shall fall within the protection scope of the present application.
Claims (10)
1. A metering fault intelligent recognition instrument for wireless communication, which is characterized by comprising:
a housing;
a processor disposed within the housing, the processor comprising:
the communication unit is used for receiving the operation data of the intelligent electric energy meter;
the data analysis unit is connected with the communication unit and is used for determining the fault type of the intelligent electric energy meter according to the operation data received by the communication unit, wherein the fault type comprises a current unbalance fault and/or a wiring fault;
the output unit is connected with the data analysis unit and is used for outputting the fault type and the operation data;
the display screen is arranged on the shell, connected with the processor and used for displaying the fault type and the operation data output by the processor.
2. The intelligent meter for measuring faults in wireless communication according to claim 1, wherein the wiring mode of the intelligent ammeter comprises three-phase four wires; the data analysis unit includes:
The first determining module is used for determining a zero line current measured value of the intelligent electric energy meter according to the operation data;
and the first fault module is used for determining that the fault type is a current unbalance fault if the ratio of the difference value between the zero line current measured value and the zero line current acquisition value to the zero line current acquisition value exceeds a preset ratio threshold.
3. The intelligent meter for measuring faults in wireless communications of claim 2 in which,
the first determining module is specifically used for determining three-phase voltage phasors according to the voltage phase sequence data in the operation data;
determining three-phase undetermined element angle data according to the voltage phasors and the power factors in the operation data through an inverse cosine function, wherein the undetermined element angle data are combinations of two element angle data with equal values and opposite directions;
screening element angle data with matched directions from the undetermined element angle data to obtain three-phase angle data;
determining a three-phase current phasor according to the phase angle data;
and determining the vector sum of the three-phase currents as the zero line current measurement value.
4. The intelligent meter for measuring faults in wireless communications of claim 1 in which the data analysis unit includes:
The generating module is used for generating a target phasor diagram of the intelligent electric energy meter according to the operation data;
the second determining module is used for determining a voltage access mode of each element of the intelligent electric energy meter and a current access mode of each element according to the load characteristic of the intelligent electric energy meter and the target phasor diagram;
and the second fault module is used for determining that the fault type is a wiring fault if the voltage access mode is different from the preset voltage wiring mode of the intelligent electric energy meter and/or the current access mode is different from the preset current wiring mode of the intelligent electric energy meter.
5. The intelligent meter for measuring faults in wireless communications of claim 4 in which,
the generating module is specifically configured to determine a voltage phasor of each element according to the voltage phase sequence data in the operation data and the voltage value of each element;
calculating the phase angle value of each element according to the power factor of each element in the operation data;
determining the phase angle direction of each element according to the active power and the reactive power of each element in the operation data;
calculating the position relation and angle between the voltage phasor and the current phasor of each element according to the phase angle value and the phase angle direction of each element;
Determining the current phasors of each element according to the position relation and the angle between the voltage phasors and the current phasors of each element and the current value of each element in the operation data;
and generating the target phasor diagram according to the voltage phasors of each element and the current phasors of each element.
6. The intelligent meter for measuring faults in wireless communications of claim 4 in which,
the second determining module is specifically configured to obtain a theoretical positional relationship and an angle between the current phasor of each element and the phase voltage of the intelligent electric energy meter according to the load characteristic of the intelligent electric energy meter;
according to the theoretical position relationship and the angle, determining a first corresponding relationship between the phase voltage and the voltage of the intelligent electric energy meter in the target phasor diagram and a second corresponding relationship between the current phasor and the current of each element;
and determining the voltage access mode and the current access mode according to the first corresponding relation and the second corresponding relation.
7. The intelligent meter for measuring faults in wireless communications of claim 6 in which,
the second determining module is specifically configured to determine, if the wiring manner of the three-phase metering device includes three phases and three lines, a target angle between the current phasors and the phase voltages whose voltages are a-phase voltages and c-phase voltages respectively along a rotation direction of the first rotation angle range in the target phasor diagram;
If the wiring mode of the three-phase metering equipment comprises three-phase four wires, determining target angles between the current phasors and the phase voltages of which the voltage phases are a-phase voltage, b-phase voltage and c-phase voltage respectively along the rotating direction of the first rotating angle range in the target phasor diagram;
and if the target angle corresponding to the current phasor is located in the first rotation angle range of the phase voltage, determining the second corresponding relation between the current phasor and the current phase according to the voltage phase of the phase voltage corresponding to the target angle.
8. The intelligent meter for measuring faults in wireless communications of claim 7 in which the first range of angles of rotation includes a positive polarity range of angles of rotation and a negative polarity range of angles of rotation;
the second determining module is specifically configured to determine that the current phasor lags the phase voltage corresponding to the target angle and is positive if the target angle corresponding to the current phasor is within the positive rotation angle range of the phase voltage;
and if the target angle corresponding to the current phasor is positioned in the negative polarity rotation angle range of the phase voltage, determining that the current phasor lags behind the phase voltage corresponding to the target angle and is negative.
9. The intelligent meter for measuring faults in wireless communications of claim 6 in which,
if the wiring mode of the intelligent electric energy meter comprises three phases and three lines, the second determining module is specifically configured to determine that the phase voltage is b-phase voltage if no current phasor exists in the target phasor diagram within a second rotation angle range associated with the load power factor angle; and if the phase voltage is located in the clockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is c-phase voltage; and if the phase voltage is located in the anticlockwise direction of the b-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the b-phase voltage, determining that the phase voltage is an a-phase voltage;
if the wiring mode of the intelligent electric energy meter comprises three-phase four wires, the second determining module is specifically configured to determine the phase voltage equivalent to the a phase in the target phasor diagram as the a-phase voltage; and if the phase voltage is located in the clockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the b-phase voltage; and if the phase voltage is located in the anticlockwise direction of the a-phase voltage in the target phasor diagram and the phase voltage is 120 degrees away from the a-phase voltage, determining that the phase voltage is the c-phase voltage.
10. The intelligent meter for measuring faults in wireless communications according to any of claims 1 to 9,
the data analysis unit is specifically configured to determine the fault type according to the operation data if the operation data received by the communication unit exceeds a preset data range.
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