CN109375144B - Current loss fault monitoring method and device based on three-phase four-wire meter equipment - Google Patents
Current loss fault monitoring method and device based on three-phase four-wire meter equipment Download PDFInfo
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Abstract
The application relates to a method and a device for monitoring a current loss fault based on three-phase four-wire meter equipment. The method comprises the following steps: acquiring various metering data; performing initial judgment of current loss according to the maximum primary side current values corresponding to the phase A, the phase B and the phase C; when the initial judgment result of the current loss is in a current loss state, extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C; respectively marking the phase corresponding to the maximum value and the current acquisition time as a current maximum phase and a current maximum time; obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment; calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current; and when the actual power of the secondary side falls into a first preset range corresponding to the power obtained by measuring the secondary side, determining that the three-phase four-wire meter device has a current loss fault.
Description
Technical Field
The application relates to the technical field of power system monitoring, in particular to a current loss fault monitoring method and device based on three-phase four-wire meter equipment, computer equipment and a storage medium.
Background
With the development of an electric power system, the range of an electric power network is rapidly increased, and the amount of metering data required to be collected by three-phase four-wire meter metering equipment is also increased. When the three-phase four-wire meter device has a current loss fault, unreal data can exist in the acquired metering data, so that huge losses of power enterprises and users are caused.
In the traditional mode, manual investigation is adopted, so that time and labor are wasted, and three-phase four-wire meter equipment with a current loss fault cannot be accurately locked; the power monitoring system is interfered by factors such as power utilization randomness, load diversity and the like, and the three-phase four-wire meter equipment with the current loss fault cannot be accurately identified. Therefore, how to accurately identify whether the three-phase four-wire meter device has a current loss fault becomes a technical problem to be solved at present.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a computer device and a storage medium for monitoring a current loss fault based on a three-phase four-wire meter device, which can improve the accuracy of monitoring the current loss fault.
A method for monitoring a current loss fault based on a three-phase four-wire meter device, the method comprising:
acquiring various metering data, wherein the metering data comprises primary side maximum current values corresponding to an A phase, a B phase and a C phase;
performing initial judgment of current loss according to the maximum primary side current values corresponding to the phase A, the phase B and the phase C;
when the initial judgment result of the current loss is in a current loss state, extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C;
marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition moment corresponding to the maximum value as a current maximum moment;
obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment;
calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current;
and when the actual power of the secondary side falls into a first preset range corresponding to the power obtained by measuring the secondary side, determining that the three-phase four-wire meter device has a current loss fault.
In one embodiment, the method further comprises:
when the initial current loss judgment result is in a non-current loss state, acquiring a primary side maximum current value corresponding to the maximum current;
if the primary side maximum current value corresponding to the maximum current is smaller than a first preset value, returning to the step of obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the moment of the maximum current;
and otherwise, determining that the three-phase four-wire meter equipment has no current loss fault.
In one embodiment, before the step of initially determining the current loss according to the primary-side maximum current values corresponding to the phases a, B, and C, the method further includes:
filtering the metering data of the single-phase electricity consumption in the plurality of metering data;
filtering the metering data with abnormal secondary side current in the plurality of metering data;
and filtering the metering data loaded as the hot standby equipment in the plurality of metering data.
In one embodiment, the filtering the metering data of the single-phase power consumption in the plurality of metering data includes:
sequencing the primary side maximum current values corresponding to the phase A, the phase B and the phase C to obtain a primary side maximum current value at a preset sequencing position;
comparing the primary side maximum current value of the preset sequencing position with a second preset value;
and when the primary side maximum current value of the preset sequencing position is smaller than a second preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
In one embodiment, the filtering the metering data of the secondary side current abnormality in the plurality of metering data includes:
acquiring secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C;
comparing the secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C with a third preset value;
and when the number of times that any one of the secondary side instantaneous current values corresponding to the phases A, B and C is larger than a third preset value exceeds a second preset range, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
In one embodiment, the filtering the metering data loaded on the hot standby device in the plurality of metering data includes:
acquiring primary side maximum current values corresponding to the phase A, the phase B and the phase C;
comparing the primary side maximum current values corresponding to the phase A, the phase B and the phase C with a fourth preset value;
and when the maximum current values of the primary sides corresponding to the A phase, the B phase and the C phase are all smaller than a fourth preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
A device for monitoring a current loss fault based on a three-phase four-wire meter device, the device comprising:
the data acquisition module is used for acquiring various metering data, and the metering data comprises primary side maximum current values corresponding to an A phase, a B phase and a C phase;
the initial judgment module is used for carrying out initial judgment of current loss according to the maximum primary side current values corresponding to the phase A, the phase B and the phase C;
the data acquisition module is further used for extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C when the initial current loss judgment result is in a current loss state; marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition moment corresponding to the maximum value as a current maximum moment; obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment;
the power calculation module is used for calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current;
and the secondary judgment module is used for determining that the three-phase four-wire meter device has a current loss fault when the actual power of the secondary side falls into a first preset range corresponding to the power obtained by measuring the secondary side.
In one embodiment, the data obtaining module is further configured to obtain a primary side maximum current value of the current maximum phase when the initial determination result is in a non-current loss state; if the primary side maximum current value of the current maximum phase is smaller than a first preset value, acquiring the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the current maximum according to the current maximum moment;
the secondary judgment module is further used for determining that no current loss fault occurs in the three-phase four-wire meter device if the primary side maximum current value of the current maximum phase is larger than a first preset value.
A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the above method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method as described above
According to the current loss fault monitoring method, device, computer equipment and storage medium based on the three-phase four-wire meter equipment, after various metering data are obtained, initial current loss judgment is carried out on the corresponding three-phase four-wire meter equipment through the metering data, after the result of the current loss state is obtained through the initial current loss judgment, the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current are obtained through the maximum value, the actual power of the secondary side is obtained through calculation, the actual power of the secondary side is compared with the power obtained through measurement of the secondary side, the current loss fault of the three-phase four-wire meter equipment is determined, the misjudgment caused by the factors such as power utilization randomness, load diversity and the like in the initial current loss judgment is effectively prevented, and the accuracy of identifying whether the three-phase four-wire meter equipment has the current loss fault is improved.
Drawings
FIG. 1 is a schematic flow diagram of a method for monitoring a loss of current fault based on a three-phase four-wire meter device according to an embodiment;
FIG. 2 is a schematic flow chart of a method for monitoring a current loss fault based on a three-phase four-wire meter device in another embodiment;
FIG. 3 is a schematic flow chart diagram illustrating the data filtering step in one embodiment;
FIG. 4 is a block diagram of an embodiment of a three-phase four-wire meter device based current loss fault monitoring apparatus;
FIG. 5 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, there is provided a method for monitoring a current loss fault based on a three-phase four-wire meter device, comprising the steps of:
The monitoring platform can utilize the secondary side data list and the marketing system data list to construct a local database. The detection platform can be a terminal or a server. The secondary side data list may be imported from the metering automation system, and includes but is not limited to: the user number, the user name, the electric meter asset number, the data acquisition time, the phase A voltage, the phase B voltage, the phase C voltage, the phase A current, the phase B current, the phase C current, the phase A power, the phase B power, the phase C power, the total power and the total phase power factor corresponding to each three-phase four-wire meter device; marketing system data listings include, but are not limited to: the method comprises the following steps of three-phase four-wire electric meter asset number, metering mode, wiring mode, current transformer transformation ratio and voltage transformer transformation ratio. The monitoring platform can obtain various metering data in a local database, wherein the metering data refers to data related to the three-phase four-wire circuit obtained through metering by the three-phase four-wire meter device, and the obtained metering data includes, but is not limited to, a primary side maximum current value corresponding to A, a primary side maximum current value corresponding to B, and a primary side maximum current value corresponding to C, wherein the primary side maximum current value refers to the maximum current value in the primary side currents within the data acquisition time.
And 104, performing initial judgment of current loss according to the maximum primary side current values corresponding to the phases A, B and C.
And the monitoring platform performs initial current loss judgment on the corresponding three-phase four-wire meter equipment according to the acquired maximum primary current values of the A phase, the B phase and the C phase, and judges whether the maximum primary current values of the A phase, the B phase and the C phase are 0 ampere or not. When the maximum primary side current value of any one of the A phase, the B phase and the C phase is 0 ampere, the initial judgment result indicates that the corresponding three-phase four-wire meter equipment is in a current loss state; and if the maximum current values of the primary sides corresponding to the A phase, the B phase and the C phase are all larger than 0 ampere, determining that the corresponding three-phase four-wire meter equipment is in a non-current loss state.
And 106, when the initial judgment result of the current loss is in a current loss state, extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C.
When the initial judgment result of the current loss is in a current loss state, the maximum primary side current value corresponding to at least one of the phases A, B and C is 0 ampere, the monitoring platform sequences the maximum primary side current values corresponding to the phases A, B and C respectively, and extracts the maximum value of the maximum primary side current values of the three phases. For example, when the initial determination result is a current loss state, where the primary-side maximum current value corresponding to a is 0 ampere, the primary-side maximum current value corresponding to B is 4 ampere, and the primary-side maximum current value corresponding to C is 6 ampere, the monitoring platform may sort the 0 ampere, the 4 ampere, and the 6 ampere from small to large or from large to small, and extract a maximum value of the three-phase primary-side maximum current values, that is, 6 ampere as a maximum value.
And 108, marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition time corresponding to the maximum value as a current maximum time.
And the monitoring platform marks the phase corresponding to the acquired maximum value as a current maximum phase, and marks the acquisition time of the current data corresponding to the maximum value as a current maximum time. For example, the primary side maximum current value corresponding to C, 6 amperes, is the maximum value among the primary side maximum current values corresponding to phases a, B, and C, and the monitoring platform marks phase C as the phase with the maximum current, i.e., the phase with the maximum primary side maximum current value among phases a, B, and C; and marking the moment of acquiring the maximum value as the moment of maximum current.
And step 110, acquiring the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current and the measured power according to the maximum current moment.
The monitoring platform can obtain the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current at the moment of the maximum current and the power measured by the three-phase four-wire meter device from a local database. If the current maximum phase is the C phase, the secondary side current, the secondary side voltage, the total phase power factor and the power measured by the three-phase four-wire meter device corresponding to the current maximum time C are obtained, and the power measured by the three-phase four-wire meter device may include the secondary side active power of the measured current maximum phase.
And 112, calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current.
The monitoring platform calculates the actual power of the secondary side of the phase with the maximum current at the moment of the maximum current according to the acquired secondary side current corresponding to the maximum current, the secondary side voltage and the total phase power factor of the three-phase four-wire circuit, wherein the actual power can comprise the actual active power of the secondary side corresponding to the maximum current. The calculation formula of the monitoring platform for calculating the secondary side actual power of the current maximum phase can include:
actual power (current × voltage × total phase power factor) ÷ coefficient
The current is a secondary side current corresponding to the maximum current at the moment of the maximum current; the voltage is the secondary side voltage corresponding to the maximum current at the moment of the maximum current; the total phase power factor is the power factor of a three-phase four-wire circuit; the coefficients may be constant, such as 1000, or variable.
And step 114, when the actual power of the secondary side falls into a first preset range corresponding to the power obtained by measuring the secondary side, determining that the three-phase four-wire meter device has a current loss fault.
And the monitoring platform compares the calculated secondary side actual power corresponding to the maximum current with the secondary side power corresponding to the maximum current measured by the three-phase four-wire meter device, and if the secondary side actual power corresponding to the maximum current falls into a first preset range corresponding to the measured power of the secondary side, the three-phase four-wire meter device corresponding to the maximum current is determined to have a current loss fault. For example, a user may set a first preset range corresponding to the measured power of the secondary side to be 2 times or more of the measured power of the secondary side, the monitoring platform may determine whether the calculated actual secondary side power corresponding to the maximum current falls within the first preset range of the measured power of the secondary side, for example, 2 times or more of the measured power of the secondary side, if the actual secondary side power is greater than 2 times of the measured power of the secondary side, the actual secondary side power falls within the first preset range corresponding to the measured power of the secondary side, and the monitoring platform may determine that the three-phase four-wire meter device corresponding to the maximum current has a current loss fault.
In one embodiment, the monitoring platform compares the calculated secondary side actual power corresponding to the maximum current with the secondary side power corresponding to the maximum current measured by the three-phase four-wire meter device, and determines that no current loss fault occurs in the three-phase four-wire meter device corresponding to the maximum current if the secondary side actual power corresponding to the maximum current does not fall within a first preset range corresponding to the measured power of the secondary side.
According to the current loss fault monitoring method based on the three-phase four-wire meter device, after various metering data are obtained, initial current loss judgment is carried out on the corresponding three-phase four-wire meter device through the metering data, after the initial current loss judgment result is in a current loss state, the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current are obtained through the maximum value, the actual power of the secondary side is obtained through calculation, the actual power of the secondary side is compared with the measured power of the secondary side, whether the current loss fault occurs in the three-phase four-wire meter device is determined, misjudgment caused by factors such as power utilization randomness and load diversity in the initial current loss judgment is effectively prevented, and the accuracy of identifying whether the current loss fault occurs in the three-phase four-wire meter device is improved.
In one embodiment, the monitoring platform may generate alarm prompt information for a three-phase four-wire meter device that determines the occurrence of a loss of current fault. The monitoring platform can acquire relevant data of the three-phase four-wire meter equipment with the current loss fault from a local database, such as a user name, a user number, an electric meter asset number, data acquisition time, A-phase current, B-phase current, C-phase current and the like corresponding to the three-phase four-wire meter equipment, and generates alarm prompt information by utilizing the relevant data. This warning prompt information accessible text prompt or modes such as voice prompt send, make the user can in time know which three-phase four-wire meter equipment the fault that loses appears, in time overhaul three-phase four-wire meter equipment to reduce the loss that the fault that loses brought.
In one embodiment, as shown in fig. 2, the method for monitoring a current loss fault based on a three-phase four-wire meter device further includes the following steps:
and step 116, when the initial current loss judgment result is in a non-current loss state, acquiring a primary side maximum current value corresponding to the maximum current.
And the monitoring platform performs initial current loss judgment on the three-phase four-wire meter equipment through the acquired metering data, and if the maximum current values of the primary sides of A, B, C three phases are all greater than 0 ampere, the three-phase four-wire meter equipment is determined to be in a non-current loss state. And when the initial judgment result of current loss is that the three-phase four-wire meter device is in a non-current loss state, acquiring a primary side maximum current value corresponding to the maximum current, wherein the primary side maximum current value corresponding to the maximum current is the maximum primary side maximum current value in the A phase, the B phase and the C phase.
The monitoring platform compares the primary side maximum current value corresponding to the maximum current with a first preset value, where the first preset value is a first threshold preset by a user, for example, the user may preset the first threshold to be 10 amperes, and the monitoring platform compares the primary side maximum current value corresponding to the maximum current with the first preset value, for example, 10 amperes. If the primary side maximum current value corresponding to the maximum current is smaller than the first preset value, that is, the primary side maximum current value corresponding to the maximum current is smaller than 10 amperes, the step 110 is returned, that is, the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current are obtained according to the maximum current moment.
And step 120, determining that no current loss fault occurs in the three-phase four-wire meter device.
And if the primary side maximum current value corresponding to the maximum current is larger than a first preset value, namely the primary side maximum current value corresponding to the maximum current is larger than 10 amperes, determining that the three-phase four-wire meter device corresponding to the maximum current does not have a current loss fault.
And after the initial judgment result of the three-phase four-wire meter device is in a non-current loss state, the monitoring platform acquires a primary side maximum current value corresponding to the maximum current value and compares the primary side maximum current value with a first preset value. When the primary side maximum current value corresponding to the maximum current is smaller than a first preset value, secondary judgment is further carried out on the three-phase four-wire meter device corresponding to the maximum current; when the maximum current value of the primary side corresponding to the maximum current is larger than a first preset value, the fact that the three-phase four-wire meter device corresponding to the maximum current does not have a current loss fault is determined. Through the secondary judgment of the maximum current value of the primary side corresponding to the maximum current, the false judgment of the monitoring platform generated in the initial judgment of the current loss due to the reactive compensation existing in the three-phase four-wire circuit is effectively filtered, the three-phase four-wire meter equipment with the current loss fault is prevented from being missed due to the false judgment of the initial judgment of the current loss, and therefore the accuracy of identifying whether the three-phase four-wire meter equipment has the current loss fault or not is improved.
In an embodiment, before step 104, the method for monitoring a current loss fault based on a three-phase four-wire meter device further includes: a step of data filtering, as shown in fig. 3, the step of data filtering specifically includes:
and step 302, filtering the metering data of the single-phase power consumption in the various metering data.
And step 304, filtering the metering data with abnormal secondary side current in the plurality of metering data.
And step 306, filtering the metering data loaded as the hot standby equipment in the various metering data.
The monitoring platform filters a large amount of metering data collected by the three-phase four-wire meter metering equipment, and filters the metering data of single-phase power utilization, the metering data of secondary side current abnormity and the metering data of hot standby equipment loaded in a three-phase four-wire circuit. The single-phase power utilization means that only one phase or two phases in the three-phase four-wire circuit are used, and the rest phases are in an idle state. The hot standby apparatus refers to an apparatus that can replace the main assembly in the case where the system is operating normally.
Because the three-phase four-wire circuit of single-phase power consumption has the phase that does not have the load, so the three-phase four-wire meter equipment that corresponds does not appear losing the current fault, and the current value of measurement probably also is 0 ampere, consequently need filter the measurement data of single-phase power consumption from multiple measurement data to avoid monitoring platform to produce the erroneous judgement when losing the initial judgement. The measured data of the abnormal secondary side current causes inaccurate judgment of the monitoring platform on the current loss fault of the three-phase four-wire meter device corresponding to the measured data of the abnormal secondary side current due to inaccuracy of the secondary side current value, so that the measured data of the abnormal secondary side current needs to be filtered from various measured data. The hot standby device has an operating condition, but does not generate a load in the three-phase four-wire circuit, so that when the three-phase four-wire circuit with the load as the hot standby device is in a non-current loss state, the current value may be 0 ampere, and therefore before the initial judgment of current loss is performed according to the maximum primary current values corresponding to the phases a, B and C, the measurement data of the load as the hot standby device needs to be filtered from various measurement data so as to avoid the occurrence of misjudgment.
By filtering the metering data of single-phase power consumption, the metering data of abnormal secondary side current and the metering data of hot standby equipment loaded with the load from various metering data, the misjudgment of whether the three-phase four-wire meter equipment has a current loss fault or not caused by the single-phase power consumption, the abnormal secondary side current and the hot standby equipment is avoided, and the accuracy of monitoring the current loss fault of the three-phase four-wire meter equipment is effectively improved; meanwhile, as the power grid range is rapidly increased along with the development of an electric power system, the metering data acquired by the three-phase four-wire meter device is also increased in a large amount, before the initial judgment of the current loss of the three-phase four-wire meter device, the metering data which can influence the initial judgment of the current loss are filtered out firstly, the single-phase power consumption, the secondary side current abnormity and the load are hot standby devices, the computing data of the monitoring platform when the initial judgment of the current loss is carried out are reduced while the monitoring accuracy of the current loss fault is improved, the running speed of the initial judgment of the current loss is accelerated, and the working efficiency of the monitoring platform is effectively improved.
In one embodiment, filtering the metering data for single-phase power usage among the plurality of metering data includes: sequencing the primary side maximum current values corresponding to the phase A, the phase B and the phase C to obtain the primary side maximum current value of a preset sequencing position; comparing the primary side maximum current value of the preset sequencing position with a second preset value; and when the primary side maximum current value of the preset sequencing position is smaller than a second preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
The monitoring platform can obtain the primary side maximum current values at a preset sequencing position by sequencing the primary side maximum current values corresponding to the A phase, the B phase and the C phase, and can sequence the primary side maximum current values corresponding to the A phase, the B phase and the C phase from small to large or from large to small. The predetermined sorting position may include a second position in the sequence, i.e., the monitoring platform may obtain a primary side maximum current value at the second position in the sequence. For example, the primary side maximum current value corresponding to a is 5 amperes, the primary side maximum current value corresponding to B is 7 amperes, and the primary side maximum current value corresponding to C is 9 amperes, and the monitoring platform can obtain the second maximum value of the primary side maximum current values by sorting 5 amperes, 7 amperes, and 9 amperes. And comparing the second large value of the primary side maximum current values corresponding to the phases a, B and C with a second preset value, which is a second current threshold value preset by a user, such as 65 amperes. And when the primary side maximum current value at the preset sequencing position is smaller than a second preset value, determining that the three-phase four-wire circuit corresponding to the primary side maximum current value is single-phase power utilization, and deleting the corresponding metering data corresponding to the three-phase four-wire meter from the various metering data. The influence of metering data generated by single-phase power consumption on the monitoring platform for monitoring the current loss fault is eliminated, and the accuracy of identifying the current loss fault is improved; meanwhile, the data processing amount of the monitoring platform is reduced, and the efficiency of identifying the three-phase four-wire meter device current loss fault by the monitoring platform is improved.
In one embodiment, filtering the metering data of the secondary side current abnormality among the plurality of metering data includes: acquiring secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C; comparing the secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C with a third preset value; and when the number of times that any one of the secondary side instantaneous current values corresponding to the phases A, B and C is larger than a third preset value exceeds a second preset range, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
And the monitoring platform compares the acquired secondary side instantaneous current values corresponding to the phases A, B and C with a third preset value, wherein the third preset value is a third threshold value preset by a user, and if the frequency that any one of the secondary side instantaneous current values corresponding to the phases A, B and C is greater than the third preset value exceeds a second preset range, the secondary side current of the three-phase four-wire circuit is determined to be abnormal, so that the monitoring platform deletes the corresponding metering data of the corresponding three-phase four-wire meter device from the various metering data. The method and the device can reduce the amount of the metering data processed by the monitoring platform and improve the operation speed and the operation efficiency of the monitoring platform.
In one embodiment, filtering the metering data loaded as the hot spare device among the plurality of metering data includes: acquiring primary side maximum current values corresponding to the phase A, the phase B and the phase C; comparing the primary side maximum current values corresponding to the phase A, the phase B and the phase C with a fourth preset value; and when the maximum current values of the primary sides corresponding to the phase A, the phase B and the phase C are all smaller than a fourth preset value, deleting the metering data corresponding to the corresponding three-wire four-wire meter device from the various metering data.
And the monitoring platform acquires the primary side maximum current values corresponding to the phase A, the phase B and the phase C from a local database, and compares the primary side maximum current values corresponding to the phase A, the phase B and the phase C with a fourth preset value, wherein the fourth preset value is a fourth threshold value preset by a user. And when the maximum current values of the primary sides corresponding to the A phase, the B phase and the C phase are all smaller than a fourth preset value, determining that the load in the corresponding three-phase four-wire circuit is hot standby equipment, and deleting the corresponding metering data of the corresponding three-phase four-wire meter equipment from the various metering data by the monitoring platform. Because the load is extremely small when the load is a hot standby device, the maximum current value of the primary side can be 0 ampere, so that the false appearance that the three-phase four-wire meter device has a current loss fault is formed. The metering data of the hot standby equipment with the load is filtered, so that the monitoring platform is prevented from misjudging the three-phase four-wire meter metering equipment, and the accuracy of monitoring the current loss fault is improved; meanwhile, the metering data are filtered before the monitoring platform performs initial judgment of the current loss, the data processed in the judgment process are reduced, and the efficiency of identifying whether the three-phase four-wire meter equipment has the current loss fault or not by the monitoring platform is improved.
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 4, there is provided a device for monitoring a current loss fault based on a three-phase four-wire meter device, comprising: a data acquisition module 402, an initial determination module 404, a power calculation module 406, and a secondary determination module 408, wherein:
a data obtaining module 402, configured to obtain multiple kinds of metering data, where the metering data includes primary-side maximum current values corresponding to an a phase, a B phase, and a C phase;
an initial determination module 404, configured to perform initial current loss determination according to the primary-side maximum current values corresponding to the phase a, the phase B, and the phase C;
the data obtaining module 402 is further configured to extract a maximum value of primary side maximum current values corresponding to the phases a, B, and C when the initial current loss determination result is the current loss state; marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition moment corresponding to the maximum value as a current maximum moment; obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment;
a power calculating module 406, configured to calculate an actual power of the secondary side by using the current, the voltage, and the total phase power factor of the secondary side corresponding to the maximum current;
and the secondary judging module 408 is configured to determine that a current loss fault occurs in the three-phase four-wire meter device when the actual power of the secondary side falls within a first preset range corresponding to the measured power of the secondary side.
In an embodiment, the data obtaining module 402 is further configured to obtain a primary side maximum current value of the maximum current phase when the initial determination result is the non-current loss state; if the primary side maximum current value of the current maximum phase is smaller than a first preset value, obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the moment of the maximum current;
the secondary determining module 408 is further configured to determine that no current loss fault occurs in the three-phase four-wire meter device if the primary-side maximum current value of the current maximum phase is greater than a first preset value.
In one embodiment, the apparatus for monitoring a current loss fault based on a three-phase four-wire meter device further includes:
the data filtering module is used for filtering the metering data of the single-phase power consumption in the various metering data; filtering the metering data with abnormal secondary side current in various metering data; the metering data loaded as hot spare equipment is filtered among a plurality of metering data.
In one embodiment, the data filtering module is further configured to sort the primary side maximum current values corresponding to the phases a, B, and C, and obtain the primary side maximum current value at a preset sorting position; comparing the primary side maximum current value of the preset sequencing position with a second preset value; and when the primary side maximum current value of the preset sequencing position is smaller than a second preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
In one embodiment, the data filtering module is further configured to obtain secondary side instantaneous current values corresponding to phases a, B, and C; comparing the secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C with a third preset value; and when the number of times that any one of the secondary side instantaneous current values corresponding to the phases A, B and C is larger than a third preset value exceeds a second preset range, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
In one embodiment, the data filtering module is further configured to obtain primary side maximum current values corresponding to phases a, B, and C; comparing the primary side maximum current values corresponding to the phase A, the phase B and the phase C with a fourth preset value; and when the maximum current values of the primary sides corresponding to the A phase, the B phase and the C phase are all smaller than a fourth preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
For specific limitations of the current loss fault monitoring device based on the three-phase four-wire meter device, reference may be made to the above limitations of the current loss fault monitoring method based on the three-phase four-wire meter device, and details are not repeated here. The modules in the current loss fault monitoring device based on the three-phase four-wire meter equipment can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided that can serve as a loss of current fault monitoring platform based on a three-phase four-wire meter device. The computer device may be a terminal or a server. When the computer device is a server, its internal structure diagram may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing three-phase four-wire meter device data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of fault monitoring for a three-phase four-wire meter based device.
Those skilled in the art will appreciate that the architecture shown in fig. 5 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the above-mentioned respective method embodiments:
it will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for monitoring a current loss fault based on a three-phase four-wire meter device, the method comprising:
acquiring various metering data, wherein the metering data comprises primary side maximum current values corresponding to an A phase, a B phase and a C phase;
performing initial judgment of current loss according to the maximum primary side current values corresponding to the phase A, the phase B and the phase C;
when the initial judgment result of the current loss is in a current loss state, extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C;
marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition moment corresponding to the maximum value as a current maximum moment;
obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment;
calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current;
when the actual power of the secondary side falls into a first preset range corresponding to the power obtained by measuring the secondary side, determining that the three-phase four-wire meter device has a current loss fault;
when the initial current loss judgment result is in a non-current loss state, acquiring a primary side maximum current value corresponding to the maximum current;
if the primary side maximum current value corresponding to the maximum current is smaller than a first preset value, returning to the step of obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the moment of the maximum current;
and otherwise, determining that the three-phase four-wire meter equipment has no current loss fault.
2. The method according to claim 1, wherein before the step of initially determining the current loss according to the maximum primary-side current values corresponding to the phases a, B, and C, the method further comprises:
filtering the metering data of the single-phase electricity consumption in the plurality of metering data;
filtering the metering data with abnormal secondary side current in the plurality of metering data;
and filtering the metering data loaded as the hot standby equipment in the plurality of metering data.
3. The method of claim 2, wherein said filtering the metering data for single phase power usage among the plurality of metering data comprises:
sequencing the primary side maximum current values corresponding to the phase A, the phase B and the phase C to obtain a primary side maximum current value at a preset sequencing position;
comparing the primary side maximum current value of the preset sequencing position with a second preset value;
and when the primary side maximum current value of the preset sequencing position is smaller than a second preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
4. The method of claim 2, wherein said filtering the secondary side current anomaly measure data from the plurality of measures data comprises:
acquiring secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C;
comparing the secondary side instantaneous current values corresponding to the phase A, the phase B and the phase C with a third preset value;
and when the number of times that any one of the secondary side instantaneous current values corresponding to the phases A, B and C is larger than a third preset value exceeds a second preset range, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
5. The method of claim 2, wherein filtering the metering data loaded on the hot spare device among the plurality of metering data comprises:
acquiring primary side maximum current values corresponding to the phase A, the phase B and the phase C;
comparing the primary side maximum current values corresponding to the phase A, the phase B and the phase C with a fourth preset value;
and when the maximum current values of the primary sides corresponding to the A phase, the B phase and the C phase are all smaller than a fourth preset value, deleting the metering data corresponding to the corresponding three-phase four-wire meter device from the various metering data.
6. A device for monitoring a current loss fault based on a three-phase four-wire meter device, the device comprising:
the data acquisition module is used for acquiring various metering data, and the metering data comprises primary side maximum current values corresponding to an A phase, a B phase and a C phase;
the initial judgment module is used for carrying out initial judgment of current loss according to the maximum primary side current values corresponding to the phase A, the phase B and the phase C;
the data acquisition module is further used for extracting the maximum value of the primary side maximum current values corresponding to the phase A, the phase B and the phase C when the initial current loss judgment result is in a current loss state; marking the phase corresponding to the maximum value as a current maximum phase, and marking the current acquisition moment corresponding to the maximum value as a current maximum moment; obtaining the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the maximum current at the maximum current moment;
the power calculation module is used for calculating the actual power of the secondary side by using the current, the voltage and the total phase power factor of the secondary side corresponding to the maximum current;
the secondary judgment module is used for determining that the three-phase four-wire meter device has a current loss fault when the actual power of the secondary side falls within a first preset range corresponding to the power obtained by measuring the secondary side;
the data acquisition module is further used for acquiring a primary side maximum current value of the current maximum phase when the initial judgment result is in a non-current loss state; if the primary side maximum current value of the current maximum phase is smaller than a first preset value, acquiring the current, the voltage, the total phase power factor and the measured power of the secondary side corresponding to the current maximum according to the current maximum moment;
the secondary judgment module is further used for determining that no current loss fault occurs in the three-phase four-wire meter device if the primary side maximum current value of the current maximum phase is larger than a first preset value.
7. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 5 when executing the computer program.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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