CN108445438B - Method and device for detecting wrong wiring of electric energy metering device - Google Patents
Method and device for detecting wrong wiring of electric energy metering device Download PDFInfo
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- CN108445438B CN108445438B CN201810246891.7A CN201810246891A CN108445438B CN 108445438 B CN108445438 B CN 108445438B CN 201810246891 A CN201810246891 A CN 201810246891A CN 108445438 B CN108445438 B CN 108445438B
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Abstract
The invention is suitable for the technical field of electric energy metering device detection, and provides a method and a device for detecting wrong wiring of an electric energy metering device. The method comprises the following steps: acquiring the metering data of an electric energy metering device of at least one phase circuit; judging whether the metering data is in a data preset range or not, and obtaining a first judgment result; and determining the wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit. The method can effectively utilize the information of the electricity information acquisition system to analyze the wrong wiring mode of the single-phase, three-phase three-wire two-element and three-phase four-wire three-element electric energy metering device, realize the actual electric quantity calculation according to the wrong wiring mode, correct the wiring according to the wrong correction scheme and improve the working efficiency.
Description
Technical Field
The invention belongs to the technical field of electric energy metering device detection, and particularly relates to a method and a device for detecting wrong wiring of an electric energy metering device.
Background
When the electric energy metering device is correctly wired, if the active power does not change the transmission direction, no matter whether the load is inductive or capacitive, or the phase sequence of the three-phase circuit, the active electric quantity of the single-phase metering device and the active electric quantity of the three-phase metering device are both positive. The generation of reverse active electric quantity is mainly reverse electric quantity generated by abnormity of wrong wiring, metering equipment failure and the like except normal reasons of power generation internet surfing, load property, parallel operation of transformers and the like. The influence of wrong wiring of the electric energy metering device on electric energy metering mainly depends on the field verification of wiring conditions by workers, and the working efficiency cannot be improved.
With the vigorous popularization and application of intelligent electric energy metering devices at home and abroad, China is building an electricity utilization information acquisition system. The electricity consumption information acquisition system comprises a main station, an acquisition terminal, an ammeter and the like, wherein the electricity consumption information acquisition system has a large amount of available data which mainly comprise important information such as voltage, current, active power, power factor, phase angle and the like of the electric energy metering device, but at present, the data are not fully utilized to judge wrong wiring of the electric energy metering device, so that the waste of information resources is caused.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for detecting a wrong wiring of an electric energy metering device, so as to solve the problems of low working efficiency and waste of information resources of an electricity consumption information acquisition system caused by manually verifying the wrong wiring of the electric energy metering device in the prior art.
The first aspect of the embodiment of the invention provides a method for detecting wrong wiring of an electric energy metering device, which comprises the following steps:
acquiring the metering data of an electric energy metering device of at least one phase circuit;
judging whether the metering data is in a data preset range or not, and obtaining a first judgment result;
and determining the wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit.
Optionally, the metering data includes: active power of the at least one phase circuit, voltage of the at least one phase circuit, current of the at least one phase circuit, power factor of the at least one phase circuit, and phase angle of the at least one phase circuit.
Optionally, the preset data range includes: an active power preset range, a voltage preset range, a current preset range, a power factor preset range and a phase angle preset range;
the judgment of whether the metering data is in a preset data range is as follows:
judging whether the active power of the at least one-phase circuit is within the preset active power range or not to obtain a power judgment result;
judging whether the voltage of the at least one-phase circuit is within the preset voltage range or not to obtain a voltage judgment result;
judging whether the current of the at least one phase circuit is within the preset current range or not to obtain a current judgment result;
judging whether the power factor of the at least one-phase circuit is within the preset range of the power factor to obtain a power factor judgment result;
judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judgment result;
the first judgment result comprises: the power determination result, the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
Optionally, the wrong wiring type includes: single-phase wrong wiring type, three-phase three-wire wrong wiring type, and three-phase four-wire wrong wiring type.
Optionally, the determining, according to the first determination result, the wrong wiring type is:
determining the single-phase wrong wiring type according to the power judgment result;
determining the three-phase three-wire wrong wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result;
and determining the type of the three-phase four-wire wrong wiring according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
A second aspect of an embodiment of the present invention provides a device for detecting a faulty wiring of an electric energy metering device, including:
the data acquisition module is used for acquiring the metering data of the electric energy metering device of at least one phase circuit;
the judging module is used for judging whether the metering data is in a preset data range or not and obtaining a first judging result;
and the error correction scheme generation module is used for determining the type of the wrong wiring according to the first judgment result and generating an error correction scheme according to the type of the wrong wiring so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit.
Optionally, the metering data includes: active power of the at least one phase circuit, voltage of the at least one phase circuit, current of the at least one phase circuit, power factor of the at least one phase circuit, and phase angle of the at least one phase circuit;
the preset range of data comprises: an active power preset range, a voltage preset range, a current preset range, a power factor preset range and a phase angle preset range;
the judging module comprises: the device comprises a power judgment unit, a voltage judgment unit, a current judgment unit, a power factor judgment unit and a phase angle judgment unit;
the power judgment unit is used for judging whether the active power of the at least one phase circuit is within the preset active power range or not to obtain a power judgment result;
the voltage judging unit is used for judging whether the voltage of the at least one phase circuit is within the preset voltage range to obtain a voltage judging result;
the current judging unit is used for judging whether the current of the at least one phase circuit is within the preset current range to obtain a current judging result;
the power factor judging unit is used for judging whether the power factor of the at least one phase circuit is within the preset range of the power factor to obtain a power factor judging result;
the phase angle judging unit is used for judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judging result;
the first judgment result comprises: the power determination result, the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
Optionally, the wrong wiring type includes: the single-phase wrong wiring type, the three-phase three-wire wrong wiring type and the three-phase four-wire wrong wiring type;
the error correction scheme generation module includes: the device comprises a single-phase error correction unit, a three-phase three-wire error correction unit and a three-phase four-wire error correction unit;
the single-phase error correction unit is used for determining the single-phase error connection type according to the power judgment result;
the three-phase three-wire error correction unit is used for determining the three-phase three-wire error wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result;
and the three-phase four-wire error correction unit is used for determining the type of the three-phase four-wire error wiring according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
A third aspect of the embodiments of the present invention provides a terminal device for detecting a faulty wiring of an electric energy metering device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements any one of the steps of the method for detecting a faulty wiring of an electric energy metering device when executing the computer program.
A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium, including: the computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the steps of any one of the above-described methods for detecting miswiring of an electric energy metering device.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: in the embodiment of the invention, the metering data of the electric energy metering device of at least one phase circuit is obtained; judging whether the metering data is in a data preset range or not, and obtaining a first judgment result; and determining a wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit, so that the wrong wiring mode of the single-phase, three-phase three-wire two-element and three-phase four-wire three-element electric energy metering device can be analyzed by effectively utilizing the information of the electricity information acquisition system, the actual electric quantity calculation can be realized according to the wrong wiring mode, the wiring can be corrected according to the wrong correction scheme, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of an implementation of a method for detecting incorrect wiring of an electric energy metering device according to an embodiment of the present invention;
FIG. 2 is a correct wiring diagram of the single-phase single-circuit electric energy metering device provided by the embodiment of the invention;
FIG. 3 is a diagram of the correct wiring of the electric energy metering device for a three-phase three-wire circuit provided by the embodiment of the present invention;
FIG. 4 is a three-phase three-wire wrong wiring type wiring diagram provided by the embodiment of the invention;
FIG. 5 is a schematic diagram of another three-phase three-wire misconnection type wiring provided by an embodiment of the invention;
FIG. 6 is a diagram of the correct wiring of the power metering device for a three-phase four-wire circuit provided by an embodiment of the present invention;
FIG. 7 is a block diagram of a device for detecting incorrect wiring of an electric energy metering device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a detection terminal device for detecting miswiring of the electric energy metering device according to the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Example one
Referring to fig. 1, a schematic flow chart of an embodiment of a method for detecting a faulty wiring of an electric energy metering device is provided, which is detailed as follows:
step S101, acquiring metering data of an electric energy metering device of at least one phase circuit.
In the electricity consumption information acquisition system, a large amount of available data can be acquired in the process of monitoring the electricity consumption condition, and the available data mainly comprises important information such as voltage, current, active power, power factor, phase angle and the like of the electric energy metering device. Therefore, the embodiment can directly acquire the metering data of the electric energy metering device acquired by the electricity consumption information acquisition system and also can directly acquire the metering data monitored by the electric energy metering device.
Optionally, the metering data includes: active power of the at least one phase circuit, voltage of the at least one phase circuit, current of the at least one phase circuit, power factor of the at least one phase circuit, and phase angle of the at least one phase circuit.
Specifically, the active power, voltage, current, power factor and phase angle of the electric energy metering device of the at least one phase circuit are obtained.
Step S102, judging whether the metering data is in a preset data range or not, and obtaining a first judgment result.
Optionally, the preset data range includes: the active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range.
Specifically, the determining whether the metering data is within a preset data range is as follows:
judging whether the active power of the at least one-phase circuit is within the preset active power range or not to obtain a power judgment result;
judging whether the voltage of the at least one-phase circuit is within the preset voltage range or not to obtain a voltage judgment result;
judging whether the current of the at least one phase circuit is within the preset current range or not to obtain a current judgment result;
judging whether the power factor of the at least one-phase circuit is within the preset range of the power factor to obtain a power factor judgment result;
and judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judgment result.
The first judgment result comprises: the power determination result, the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
The active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range of the single-phase circuit are different from the active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range of the three-phase circuit, and the active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range are different from each other in the three-phase circuit according to different wiring modes and different numbers of electric energy metering devices. That is, the active power preset range, the voltage preset range, the current preset range, the power factor preset range, and the phase angle preset range are different for different N-phase circuits, different numbers of electric energy metering devices, and different wiring modes of the electric energy metering devices.
And step S103, determining a wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit.
Optionally, the wrong wiring type includes: single-phase wrong wiring type, three-phase three-wire wrong wiring type, and three-phase four-wire wrong wiring type.
Further, the determining the wrong wiring type according to the first judgment result specifically includes:
determining the single-phase wrong wiring type according to the power judgment result;
determining the three-phase three-wire wrong wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result;
and determining the type of the three-phase four-wire wrong wiring according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
Illustratively, as shown in fig. 2, (a) is a proper wiring diagram of the electric energy metering device of the single-phase circuit, and (b) is a vector diagram of the voltage and current of the single-phase circuit, where phi is the phase angle between the voltage and the current. Aiming at a single-phase circuit, the active power when an electric energy metering device of the single-phase circuit is correctly connected is P ═ UPhase (C)IPhase (C)cos phi if the electric energy metering device of the single-phase circuit is wrongly connected, for example, the current coil of the electric energy metering device is reversely connected, the direction of the current flowing into the coil of the electric energy metering device is negative, and the active power is PMeter＝UPhase (C)IPhase (C)cos(180°-φ)＝-UPhase (C)IPhase (C)cos phi. Therefore, when the active power of the single-phase circuit is within the preset active power range, namely the active power of the single-phase circuit is a negative value, the wrong wiring of the electric energy metering device of the single-phase circuit is determined, namely the single-phase wrong wiring type is determined. And generating a one-way wrong wiring type correction scheme according to the one-way wrong wiring type, and informing the staff in the modes of alarm, short message or screen display and the like.
The three-phase three-wire circuit is suitable for a neutral point insulation system, a primary power supply system does not have a grounding wire, and the three-phase three-wire circuit inherently ensures iA+iB+iCThe three-phase electric energy can be correctly measured by only two elements, and the electric energy measuring device is arranged on the high-voltage side of a user transformer for high power supply high measurement. At present, large users of a distribution network generally adopt the form, although the number of electric energy metering devices is less than that of three-phase four-wire circuits, the multiplying power of a voltage transformer and a current transformer is large, the electric energy metering value can be divided into 'difference' and 'lose thousands of miles' at last, and therefore detection and analysis of wrong wiring of the electric energy metering device of the three-phase three-wire circuit are very important.
As shown in fig. 3, (a) is a diagram of correct wiring of the electric energy metering device of the three-phase three-wire circuit including 2 electric energy metering devices, and (b) is a vector diagram of voltages and currents of respective phases when the electric energy metering device of the three-phase three-wire circuit is correctly wired, where phiaIs the phase angle between the phase of the A-phase voltage and the phase of the A-phase current, phicThe phase angle between the phase voltage of the C-phase and the phase current of the C-phase. Wherein if the three-phase circuit is symmetrical, i isa+ib+ic＝0，Ia＝Ic＝IThread，Uab＝Ucb＝UThread，φa＝φcWhen phi is satisfied, the active power is
If the primary power supply system to be metered has a ground wire or the three-phase current is asymmetric, ia+ib+icNot equal to 0, the electric energy can be measuredAn error occurs.
Optionally, the three-phase three-wire wrong wiring type includes: a secondary circuit miswiring type, a voltage circuit disconnection and short circuit type, and a current circuit disconnection and short circuit type.
For example, assuming that the primary wiring is correct, the polarity of the same-name end of the secondary circuit of the voltage transformer is not misconnected, and the current on the secondary common circuit of the current transformer
Under the condition that no metering loop of two metering elements in the electric energy metering device flows, the number of wrong wiring of a secondary voltage loop is 6, the number of wrong wiring of a secondary current loop is 8, and the total number of 6 multiplied by 8 is 48 common wrong wiring modes. Since the reverse voltage sequence is the same as the forward power expression, there are 24 erroneous power expressions. The 24 cases for determining the type of the secondary circuit wrong connection based on the phase angle judgment result and the active power judgment result are detailed in table 1.
TABLE 1 determination of secondary loop false wire type based on phase angle and active power determination results
As can be seen from table 1, the active power preset range and the phase angle preset range are different according to different connection modes and different load characteristics. When the active power preset range is set to be the forward direction, the corresponding phase angle preset ranges are different according to different connection modes of the two elements, so that the type of wrong wiring in the circuit can be determined according to the active power judgment result and the phase angle judgment result, and an error correction scheme is generated according to the error type.
For example, in table 1, number 2, it can be known from the active power determination result that the active power measured by the electric energy metering device is the positive direction, and it is determined whether the phase angle obtained by the first metering element in the electric energy metering device is within the phase angle preset range (330 ° to 30 °) or (30 ° to 120 °), and whether the phase angle obtained by the second metering element is within the phase angle preset range (0 ° to 90 °) or (90 ° to 180 °), so as to obtain the phase angle determination result; if the resulting phase angle at the first meter element is within the phase angle preset range (330-30) or (30-120), and the phase angle obtained by the second metering element is within the phase angle preset range (0-90 degrees) or (90-180 degrees), namely, the wrong wiring type can be determined to be a secondary circuit wrong wiring type in the three-phase three-wire wrong wiring type according to the phase angle judgment result, and an error correction scheme can be generated according to the type of the secondary circuit wrong wiring, and the corresponding result in the table 1 shows that the current transformers are reversely connected in the secondary circuit, i.e. Ia is negative, Ic is negative, and the A-phase measurement device is staggered into the B-phase circuit, namely, the voltages Uca and Uba, and after determining the wrong wiring type and the wrong wiring mode, an error correction scheme can be specifically generated, namely, the wiring of the circuit transformer and the wiring of 2 metering elements are adjusted.
Further, referring to fig. 4, a wiring diagram of a three-phase three-wire wrong wiring type provided by the embodiment of the present invention, specifically, a wiring diagram of a secondary circuit wrong wiring type, is calculated according to fig. 4, where the active power of the three-phase three-wire wrong wiring circuit is: the active power of the first metering element is p1＝uaciacos (30-phi), active power of the second metering element is p2＝ubciccos (150 ° + phi), the sum of the active powers of the two measuring elements is
And when the wiring error type is determined to be a secondary circuit wrong wiring type in the three-phase three-wire wrong wiring type according to the active power judgment result and the phase angle judgment result, generating a wrong wiring correction scheme.
Optionally, the wrong wiring correction scheme includes correction of active power in addition to wiring correction. When correcting the active power measured by the wrong wiring circuit, a correction coefficient is needed, and the correction coefficient is equal to the ratio of the correct active power to the actually recorded wrong active power.
Obtaining the correction coefficient according to the active power p when the wrong wiring is performed, wherein
And obtaining correct active power according to the correction coefficient, namely obtaining correct metered electric energy.
Optionally, the type of the open circuit and the short circuit of the voltage circuit and the type of the open circuit and the short circuit of the current circuit may be determined according to the voltage judgment result, the current judgment result and the phase angle judgment result. The process of determining the type of open circuit and short circuit of the voltage circuit and the type of open circuit and short circuit of the current circuit based on the voltage determination result, the current determination result and the phase angle determination result is detailed in table 2.
TABLE 2 determine types of open and short circuits of voltage circuit and types of open and short circuits of current circuit based on the voltage determination result, current determination result, and phase angle determination result
In the exemplary voltage loop open-circuit and short-circuit type, the voltage loop B is open-circuit. As shown in fig. 5, another wiring diagram of three-phase three-wire wrong wiring type provided by the embodiment of the present invention is specifically a wiring diagram of B-phase disconnection of the voltage loop, the left diagram is a connection diagram of B-phase disconnection of the voltage loop of the three-phase three-wire circuit, and the right diagram is a vector diagram of each phase voltage current measured when B-phase disconnection of the voltage loop of the three-phase three-wire circuit occurs, where Φ isaIs the phase angle between the A-phase voltage and the current, phicThe phase angle between the phase voltage and the current of C is, the active power between the phase A and the phase C is
The active power between the C phase and the A phase is
The total active power measured when the phase B of the voltage loop of the three-phase three-wire circuit is disconnected is
When the voltage or current loop disconnection and short circuit type in the three-phase three-wire wrong connection type is determined according to the voltage judgment result, the current judgment result and the phase angle judgment result, generating a wrong connection correction scheme according to the voltage or current loop disconnection and short circuit type, and obtaining a correction coefficient of wrong active power when the voltage loop B phase of the three-phase three-wire circuit is disconnected, wherein the correction coefficient is
And obtaining the correct total active power when the phase B of the voltage loop is disconnected according to the correction coefficient.
In the low-voltage three-phase four-wire circuit, a voltage transformer is not used when the active electric energy metering device meters, most of the active electric energy metering devices are current transformers, and when correct wiring is performed and three elements in the electric energy metering device are adjusted to be balanced, each element is connected with a phase circuit. Illustratively, referring to fig. 6, a correct wiring diagram of the electric energy metering device of the three-phase four-wire circuit provided by the embodiment of the present invention is shown, the total three-phase power of the electric energy metering device of the three-phase four-wire circuit is the sum of the power of each phase, that is, the active power of the three-phase four-wire circuit is P ═ Pa+Pb+Pc＝UaIacosφa+UbIbcosφb+UcIccosφcIf the three-phase four-wire circuit is symmetrical, there is Ua＝Ub＝Uc＝UPhase (C),Ia＝Ib＝Ic＝IPhase (C)If phia is equal to phib and phic is equal to phi, the active power of the three-phase four-wire circuit is equal to 3UPhase (C)IPhase (C)cosφ。
Optionally, the three-phase four-wire wrong wiring type includes: a component unmeasured type, a component reverse connection type, and an inter-component signal combination error type.
The unmeasured type of the element is caused by the reasons that a voltage loop is not connected, a current transformer is open or short-circuited and the likeThe component is not in metering, the wrong wiring type is that the electric energy metering device can measure less electric quantity, and when the wrong wiring occurs, the correction coefficient G for correcting the measured wrong active powerX>1。
Specifically, the process of determining the unmetered type of the components in the three-phase four-wire wrong wiring type according to the voltage judgment result and the current judgment result is detailed in table 3.
TABLE 3 determination of three-phase four-wire misconnection type based on voltage and current determination results
Type of unmetered component
The reverse connection type of the elements is that the outlet ends of the secondary windings of the current transformer are reversely connected, so that whether wrong wiring occurs can be directly judged according to the current of the three-phase four-wire circuit. Specifically, whether the current of the three-phase four-wire circuit is within a preset current range or not is judged, a current judgment result is obtained, and the reverse connection type of the elements in the three-phase four-wire wrong wiring type is determined according to the current judgment result. The process of determining the reverse connection type of the elements in the three-phase four-wire wrong wiring type according to the current judgment result is detailed in table 4.
TABLE 4 determination of the type of reverse connection of the elements based on the current determination
Optionally, the inter-element signal combination error types include: one element is of the same-phase signal and the other two elements are of the signal crossing type, each phase voltage and leading-phase current type and each phase voltage and lagging-phase current type.
The number of the wrong wiring types of one element for the signal crossing of the other two elements of the same-phase signal is 24, and one element in the three-phase four-wire wrong wiring type can be determined to be the signal crossing type of the other two elements of the same-phase signal according to the phase angle judgment result and the current judgment result. Specifically, the error wiring process for determining that one element is the signal crossing type of two other elements of the in-phase signal according to the phase angle judgment result and the current judgment result is detailed in table 5.
TABLE 5 determination of one element as two other elements of the same phase signal based on the phase angle and current determinations
Individual element signal crossing type
As can be seen from table 5, when one element is an in-phase signal, the positive connection and the negative connection of the element can be included, and when the signals of the other two elements are crossed, the positive connection and the negative connection of the element are also included, and each wrong connection condition corresponds to a different preset range of phase angles, wherein the "-" in front of each letter symbol represents the negative connection. For example, the phase angle preset range of the forward connection of the phase A element, the cross forward connection of the phase B element and the phase C element in the sequence number 1 is
When the phase angle of the circuit is measured, if the phase angle between the voltage and the current of the A phase, the phase angle between the voltage and the current of the B phase and the phase angle between the voltage and the current of the C phase are measured, the phase angle between the voltage and the current of any two phases is in
And obtaining a phase angle judgment result, and determining that one element is an in-phase signal and the other two elements are in a signal crossing type according to the phase angle judgment result.
The conditions of each phase voltage and the type of the leading phase current are totally 8, and the process of determining the type of each phase voltage and the type of the leading phase current according to the phase angle judgment result and the current judgment result is detailed in table 6.
TABLE 6 determination of the phase voltage and leading phase current types for each phase based on the phase angle and current determinations
The number of the wrong wiring of each phase voltage and the type of the lagging phase current is 8, and the process of determining the type of each phase voltage and the type of the lagging phase current according to the phase angle judgment result and the current judgment result is detailed in a table 7.
TABLE 7 determine phase current type per phase voltage and hysteresis according to the phase angle determination and current determination results
The method for detecting the wrong wiring of the electric energy metering device obtains the metering data of the electric energy metering device of at least one phase circuit; judging whether the metering data is in a data preset range or not, and obtaining a first judgment result; and determining a wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit, so that the wrong wiring mode of the single-phase, three-phase three-wire two-element and three-phase four-wire three-element electric energy metering device can be analyzed by effectively utilizing the information of the electricity information acquisition system, the actual electric quantity calculation can be realized according to the wrong wiring mode, the wiring can be corrected according to the wrong correction scheme, and the working efficiency is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Example two
Corresponding to the method for detecting the miswiring of the electric energy metering device in the first embodiment, a device for detecting the miswiring of the electric energy metering device provided by the embodiment of the invention is shown in fig. 7. For convenience of explanation, only the portions related to the present embodiment are shown.
The apparatus includes an information data acquisition module 110, a judgment module 120, and an error correction scheme generation module 130.
The data obtaining module 110 is configured to obtain measurement data of an electric energy measuring device of at least one phase circuit.
The determining module 120 is configured to determine whether the measured data is within a preset data range, and obtain a first determination result.
The error correction scheme generating module 130 is configured to determine an error wiring type according to the first determination result, and generate an error correction scheme according to the error wiring type, so that a maintenance worker can correct the wiring of the electric energy metering device of the at least one phase circuit.
Optionally, the metering data includes: active power of the at least one phase circuit, voltage of the at least one phase circuit, current of the at least one phase circuit, power factor of the at least one phase circuit, and phase angle of the at least one phase circuit.
The preset range of data comprises: the active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range.
The judging module 120 includes: a power judgment unit 121, a voltage judgment unit 122, a current judgment unit 123, a power factor judgment unit 124 and a phase angle judgment unit 125;
the power determining unit 121 is configured to determine whether the active power of the at least one phase circuit is within the preset active power range, so as to obtain a power determining result.
The voltage determining unit 122 is configured to determine whether the voltage of the at least one phase circuit is within the preset voltage range, so as to obtain a voltage determining result.
The current determining unit 123 is configured to determine whether the current of the at least one phase circuit is within the preset current range, so as to obtain a current determining result.
The power factor determining unit 124 is configured to determine whether the power factor of the at least one phase circuit is within the preset power factor range, so as to obtain a power factor determining result.
The phase angle determining unit 125 is configured to determine whether a phase angle of the at least one phase circuit is within the phase angle preset range, so as to obtain a phase angle determining result.
The first judgment result comprises: the power determination result, the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
Optionally, the wrong wiring type includes: single-phase wrong wiring type, three-phase three-wire wrong wiring type, and three-phase four-wire wrong wiring type.
The error correction scheme generation module 130 includes: a single-phase error correction unit 131, a three-phase three-wire error correction unit 132, and a three-phase four-wire error correction unit 133.
The single-phase error correction unit 131 is configured to determine the single-phase error connection type according to the power determination result.
The three-phase three-wire error correction unit 132 is configured to determine the three-phase three-wire erroneous connection type according to the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
The three-phase four-wire error correction unit 133 is configured to determine the type of the three-phase four-wire erroneous connection according to the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
In the device, the data acquisition module 110 acquires the metering data of the electric energy metering device of at least one phase circuit; the judging module 120 judges whether the measured data is within a preset data range, and obtains a first judgment result; the error correction scheme generation module 130 determines an error wiring type according to the first determination result, and generates an error correction scheme according to the error wiring type to allow a maintenance worker to correct the wiring of the electric energy metering device of the at least one phase circuit, so that the information of the electricity information acquisition system can be effectively utilized to analyze the error wiring mode of the single-phase, three-wire two metering elements and three-phase, four-wire three-element electric energy metering device, actual electric quantity calculation according to the error wiring mode is realized, the wiring is corrected according to the error correction scheme, and the working efficiency is improved.
EXAMPLE III
Fig. 8 is a schematic diagram of a terminal device 100 for detecting incorrect wiring of an electric energy metering device according to a third embodiment of the present invention. As shown in fig. 8, the detection terminal device 100 of the miswiring of the electric energy metering device of the embodiment includes: a processor 140, a memory 150 and a computer program 151 stored in said memory 150 and executable on said processor 140, such as a detection control program for faulty wiring of an electric energy metering device. The processor 140, when executing the computer program 151, implements the steps in the above-described embodiments of the method for detecting miswiring of the respective electric energy metering devices, such as the steps S101 to S103 shown in fig. 1. Alternatively, the processor 140 implements the functions of the modules/units in the above device embodiments, such as the functions of the modules 110 to 130 shown in fig. 7, when executing the computer program 151.
Illustratively, the computer program 151 may be partitioned into one or more modules/units that are stored in the memory 150 and executed by the processor 140 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 151 in the terminal device 100 for PDF text extraction. For example, the computer program 151 may be divided into an acquisition module, a judgment module and an error correction scheme generation module, and each module has the following specific functions:
the data acquisition module is used for acquiring the metering data of the electric energy metering device of at least one phase circuit.
The judging module is used for judging whether the metering data is in a data preset range or not and obtaining a first judging result.
And the error correction scheme generation module is used for determining the type of the wrong wiring according to the first judgment result and generating an error correction scheme according to the type of the wrong wiring so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit.
Optionally, the metering data includes: active power of the at least one phase circuit, voltage of the at least one phase circuit, current of the at least one phase circuit, power factor of the at least one phase circuit, and phase angle of the at least one phase circuit.
The preset range of data comprises: the active power preset range, the voltage preset range, the current preset range, the power factor preset range and the phase angle preset range.
The judging module comprises: the device comprises a power judgment unit, a voltage judgment unit, a current judgment unit, a power factor judgment unit and a phase angle judgment unit;
the power judgment unit is used for judging whether the active power of the at least one phase circuit is within the preset active power range or not to obtain a power judgment result.
The voltage judging unit is used for judging whether the voltage of the at least one phase circuit is within the preset voltage range to obtain a voltage judging result.
The current judging unit is used for judging whether the current of the at least one phase circuit is within the preset current range or not to obtain a current judging result.
The power factor judging unit is used for judging whether the power factor of the at least one phase circuit is within the preset power factor range or not to obtain a power factor judging result.
The phase angle judging unit is used for judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judging result.
The first judgment result comprises: the power determination result, the voltage determination result, the current determination result, the power factor determination result, and the phase angle determination result.
Optionally, the wrong wiring type includes: single-phase wrong wiring type, three-phase three-wire wrong wiring type, and three-phase four-wire wrong wiring type.
The error correction scheme generation module includes: the device comprises a single-phase error correction unit, a three-phase three-wire error correction unit and a three-phase four-wire error correction unit.
The single-phase error correction unit is used for determining the single-phase error wiring type according to the power judgment result.
And the three-phase three-wire error correction unit is used for determining the three-phase three-wire error wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
And the three-phase four-wire error correction unit is used for determining the type of the three-phase four-wire error wiring according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
The terminal device 100 for detecting the incorrect wiring of the electric energy metering device may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device 100 for detecting miswiring of the electric energy metering device can include, but is not limited to, a processor 140 and a memory 150. Those skilled in the art will appreciate that fig. 8 is only an example of the mis-wired detection terminal device 100 of the power metering device, and does not constitute a limitation of the mis-wired detection terminal device 100 of the power metering device, and may include more or less components than those shown, or combine some components, or different components, for example, the mis-wired detection terminal device 100 of the power metering device may further include an input-output device, a network access device, a bus, etc.
The Processor 140 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 150 may be an internal storage unit of the power metering device mis-wiring detection terminal device 100, such as a hard disk or a memory of the power metering device mis-wiring detection terminal device 100. The memory 150 may also be an external storage device of the terminal device 100 for detecting the incorrect wiring of the electric energy metering device, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are equipped on the terminal device 100 for detecting the incorrect wiring of the electric energy metering device. Further, the memory 150 may also include both an internal storage unit of the detection terminal device 100 for detecting miswiring of the electric energy metering device and an external storage device. The memory 150 is used to store the computer program and other programs and data required for the detection of a faulty wiring of the electric energy metering device by the terminal device 100. The memory 150 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A method for detecting wrong wiring of an electric energy metering device is characterized by comprising the following steps:
acquiring the metering data of an electric energy metering device of at least one phase circuit;
judging whether the metering data is in a data preset range or not, and obtaining a first judgment result;
determining a wrong wiring type according to the first judgment result, and generating a wrong correction scheme according to the wrong wiring type so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit;
wherein the wrong wiring type comprises: a single-phase wrong wiring type, a three-phase three-wire wrong wiring type, and a three-phase four-wire wrong wiring type, the three-phase four-wire wrong wiring type including: the method comprises the following steps of (1) determining an element unmeasured type, an element reverse connection type and an inter-element signal combination error type;
wherein the error correction scheme for the element unmetered type in the three-phase three-wire misconnection type and the three-phase four-wire misconnection type comprises: a wiring correction scheme and an active power correction scheme, the active power correction scheme having a correction factor greater than 1 when the mis-wired type is a component unmetered type in the three-phase four-wire mis-wired type;
the metering data includes: a voltage of the at least one phase circuit, a current of the at least one phase circuit, and a phase angle of the at least one phase circuit;
the preset range of data comprises: a voltage preset range, a current preset range and a phase angle preset range;
the judgment of whether the metering data is in a preset data range is as follows:
judging whether the voltage of the at least one-phase circuit is within the preset voltage range or not to obtain a voltage judgment result;
judging whether the current of the at least one phase circuit is within the preset current range or not to obtain a current judgment result;
judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judgment result;
the first criterion result comprises the voltage judgment result, the current judgment result and the phase angle judgment result;
the determining the wrong wiring type according to the first judgment result comprises:
determining an element unmetered type in the three-phase four-wire wrong wiring type according to the voltage judgment result and the current judgment result;
determining the reverse connection type of elements in the three-phase four-wire wrong connection type according to the current judgment result;
and determining the inter-element signal combination error type in the three-phase four-wire wrong wiring type according to the phase angle judgment result and the current judgment result.
2. The method for detecting miswiring of an electrical energy metering device of claim 1, wherein the metering data further comprises: active power of the at least one phase circuit and a power factor of the at least one phase circuit.
3. The method for detecting miswiring of an electric energy metering device according to claim 2, wherein the preset range of data further comprises: an active power preset range and a power factor preset range;
the judging whether the metering data is in a preset data range further comprises:
judging whether the active power of the at least one-phase circuit is within the preset active power range or not to obtain a power judgment result;
judging whether the power factor of the at least one-phase circuit is within the preset range of the power factor to obtain a power factor judgment result;
the first judgment result further includes: the power judgment result and the power factor judgment result.
4. The method for detecting the wrong wiring of the electric energy metering device according to the claim 3, characterized in that the determination of the wrong wiring type according to the first judgment result is:
determining the single-phase wrong wiring type according to the power judgment result;
and determining the three-phase three-wire wrong wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
5. A device for detecting miswiring of an electric energy metering device, comprising:
the data acquisition module is used for acquiring the metering data of the electric energy metering device of at least one phase circuit;
the judging module is used for judging whether the metering data is in a preset data range or not and obtaining a first judging result;
the error correction scheme generation module is used for determining the type of the wrong wiring according to the first judgment result and generating an error correction scheme according to the type of the wrong wiring so that maintenance personnel can correct the wiring of the electric energy metering device of the at least one-phase circuit;
wherein the wrong wiring type comprises: a single-phase wrong wiring type, a three-phase three-wire wrong wiring type, and a three-phase four-wire wrong wiring type, the three-phase four-wire wrong wiring type including: the method comprises the following steps of (1) determining an element unmeasured type, an element reverse connection type and an inter-element signal combination error type;
wherein the error correction scheme for the element unmetered type in the three-phase three-wire misconnection type and the three-phase four-wire misconnection type comprises: a wiring correction scheme and an active power correction scheme, the active power correction scheme having a correction factor greater than 1 when the mis-wired type is a component unmetered type in the three-phase four-wire mis-wired type;
wherein the metering data comprises: a voltage of the at least one phase circuit, a current of the at least one phase circuit, and a phase angle of the at least one phase circuit;
the preset range of data comprises: a voltage preset range, a current preset range and a phase angle preset range;
the judging module comprises: the device comprises a voltage judging unit, a current judging unit and a phase angle judging unit;
the voltage judging unit is used for judging whether the voltage of the at least one phase circuit is within the preset voltage range to obtain a voltage judging result;
the current judging unit is used for judging whether the current of the at least one phase circuit is within the preset current range to obtain a current judging result;
the phase angle judging unit is used for judging whether the phase angle of the at least one phase circuit is within the phase angle preset range or not to obtain a phase angle judging result;
the first criterion result comprises the voltage judgment result, the current judgment result and the phase angle judgment result;
the error correction scheme generation module is used for determining an element unmetered type in the three-phase four-wire error wiring type according to the voltage judgment result and the current judgment result;
determining the reverse connection type of elements in the three-phase four-wire wrong connection type according to the current judgment result;
and determining the inter-element signal combination error type in the three-phase four-wire wrong wiring type according to the phase angle judgment result and the current judgment result.
6. The device for detecting miswiring of an electric energy metering device according to claim 5, wherein said metering data further includes: active power of the at least one phase circuit and a power factor of the at least one phase circuit;
the preset range of data further comprises: an active power preset range and a power factor preset range;
the judging module further comprises: a power judgment unit and a power factor judgment unit;
the power judgment unit is used for judging whether the active power of the at least one phase circuit is within the preset active power range or not to obtain a power judgment result;
the power factor judging unit is used for judging whether the power factor of the at least one phase circuit is within the preset range of the power factor to obtain a power factor judging result;
the first judgment result further includes: the power judgment result and the power factor judgment result.
7. The device for detecting miswiring of an electric energy metering device according to claim 6, wherein the error correction scheme generation module includes: the device comprises a single-phase error correction unit, a three-phase three-wire error correction unit and a three-phase four-wire error correction unit;
the single-phase error correction unit is used for determining the single-phase error connection type according to the power judgment result;
and the three-phase three-wire error correction unit is used for determining the three-phase three-wire error wiring type according to the voltage judgment result, the current judgment result, the power factor judgment result and the phase angle judgment result.
8. A terminal device for detecting incorrect wiring of an electric energy metering device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 4 when executing the computer program.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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| CN104991152A (en) * | 2015-06-24 | 2015-10-21 | 国家电网公司 | Method and device for analyzing wrong wiring of three-phase three-wire electric energy metering device |
| CN105116272A (en) * | 2015-08-18 | 2015-12-02 | 国家电网公司 | Device for detecting wiring fault of secondary circuit of electric energy meter |
| CN106569170A (en) * | 2016-11-09 | 2017-04-19 | 国网山东省电力公司临朐县供电公司 | Metering device secondary circuit detector and detection method thereof |
| CN107329105A (en) * | 2017-06-26 | 2017-11-07 | 云南电网有限责任公司西双版纳供电局 | A kind of three-phase and four-line multifunctional electric energy meter wiring determination methods |
| CN107508287A (en) * | 2017-08-25 | 2017-12-22 | 南方电网科学研究院有限责任公司 | Electricity grid substation load grouping method, device, storage medium and computer equipment |
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