CN111766465A - Intelligent accounting terminal for electric quantity compensation - Google Patents
Intelligent accounting terminal for electric quantity compensation Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
- G01R21/002—Measuring real component
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
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Abstract
The invention discloses an electric quantity compensation intelligent accounting terminal, which comprises: the meter reading module is used for reading the electric power data of the electric energy metering device and acquiring the type of the electric energy metering device; the fault detection module is used for analyzing whether a fault occurs and the fault type according to the power data; and the electric quantity compensation module is used for constructing a corresponding electric quantity compensation accounting model according to the type of the electric energy metering device and the fault type, and accounting the compensation electric quantity. The invention has at least the following beneficial effects: the electric power data are acquired and then automatically calculated, so that manual calculation errors are avoided, the processing efficiency is improved, the knowledge threshold of an operator is reduced, and a large amount of manpower and material resources are saved.
Description
Technical Field
The invention relates to the field of power distribution, in particular to an electric quantity compensation intelligent accounting terminal.
Background
When the electric quantity metering device is in a fault state, the electric quantity metering is inaccurate, and when the electric quantity metering device is in the fault state, how to accurately and efficiently calculate the compensation electric quantity by the power consumption department and the metering department is the work which needs to be processed. At present, electric quantity compensation work mainly depends on manual compensation accounting, when a metering device breaks down, the electric quantity compensation work usually means that a worker conducts derivation calculation step by step according to experience and professional knowledge, calculation steps are complex, the number of people capable of being mastered is small, and more importantly, the processing method is extremely low in processing efficiency and high in error probability.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an electric quantity compensation intelligent accounting terminal which can improve the processing efficiency of electric quantity compensation work and reduce the error probability.
According to the embodiment of the first aspect of the invention, the intelligent accounting terminal for electric quantity compensation comprises: the meter reading module is used for reading the electric power data of the electric energy metering device and acquiring the type of the electric energy metering device; the fault detection module is used for analyzing whether a fault occurs and the fault type according to the power data; and the electric quantity compensation module is used for constructing a corresponding electric quantity compensation accounting model according to the type of the electric energy metering device and the fault type, and accounting the compensation electric quantity.
The electric quantity compensation intelligent accounting terminal provided by the embodiment of the invention at least has the following beneficial effects: the terminal automatically calculates after acquiring the electric power data, thereby avoiding manual calculation errors, improving the processing efficiency of electric quantity compensation work, reducing the knowledge threshold of operators and saving a large amount of manpower and material resources.
According to some embodiments of the invention, the fault detection module comprises: the line detection module is used for acquiring single-phase voltage, current and power factor according to the electric power data and judging whether line abnormity occurs or not; and the voltage loss detection module is used for detecting the single-phase voltage, judging whether a voltage loss fault occurs or not and judging whether the type of the voltage loss fault is one of complete voltage loss or incomplete voltage loss or not. And judging whether the line abnormity and the voltage loss abnormity exist or not according to the electric power data, and determining fault classification, so that electric quantity compensation calculation corresponding to the fault classification is provided conveniently.
According to some embodiments of the invention, the line detection module comprises: and the single-phase detection module is used for detecting the relation among the voltage, the current and the power factor of the single phase and judging whether the circuit is abnormal or not.
According to some embodiments of the invention, the electric quantity compensation module comprises: the parameter extraction module is used for extracting the power data during the fault occurrence period according to the power data; the voltage loss processing module is used for constructing a corresponding calculation model according to the type of the voltage loss fault based on the type of the electric energy metering device to obtain a first voltage loss voltage and a first voltage loss power factor; and the electric quantity calculation module is used for obtaining the corresponding compensation electric quantity based on the type of the voltage loss fault according to the first voltage loss voltage and the first voltage loss power factor. The compensation electric quantity under different voltage loss fault types is intelligently calculated, the processing efficiency is improved, and the manpower consumption is reduced.
According to some embodiments of the invention, the voltage loss processing module comprises: the first voltage loss calculation module is used for constructing a calculation model of the three-phase four-wire metering device, obtaining a first voltage loss voltage according to the voltage of a non-voltage loss phase during a fault period, and obtaining a corresponding first voltage loss power factor according to the type of the voltage loss fault; and the second voltage loss calculation module is used for constructing a calculation model of the three-phase three-wire metering device, obtaining the first voltage loss voltage according to the line voltage between non-voltage loss phases and obtaining the corresponding first voltage loss power factor according to the type of the voltage loss fault. Corresponding processing is respectively carried out according to different types of the electric energy metering devices, the processing capacity of the terminal is improved, and accurate supplement electric quantity can be obtained.
According to some embodiments of the invention, the meter reading module comprises at least one of: the infrared meter reading module is used for recording the address of the electric energy metering device and receiving the electric power data through an infrared protocol; and the RS485 meter reading module is used for inputting the address of the electric energy metering device and acquiring the electric power data according to an ammeter protocol. The method and the device have the advantages that various modes of communicating with the electric energy metering device to obtain electric power data are provided, and the compatibility of the terminal is improved.
According to some embodiments of the invention, further comprising: and the wiring judgment module is used for importing the electric power detection data of the electric energy metering device, drawing a vector diagram of the electric energy metering device and judging and analyzing the wiring error condition. The detection data aiming at the electric energy metering device is imported, the processing range of the electric quantity compensation accounting is expanded, and the electric quantity compensation accounting can be automatically carried out under the condition that the electric energy metering device has wiring errors.
According to some embodiments of the invention, further comprising: and the electric power analysis module is used for analyzing the electric power data of the electric energy metering device in a normal wiring state to obtain a first electric power parameter characteristic. The power parameter characteristics under the normal state are obtained and can be used as reference, and the terminal can automatically detect various errors.
According to some embodiments of the invention, the electric quantity compensation module further comprises: and the wiring error processing module is used for analyzing according to the electric power detection data and the electric power data to obtain a time interval of a wiring error fault, and obtaining the compensation electric quantity based on a preset electric quantity compensation accounting model according to the first electric power parameter characteristic. The electric quantity compensation under the condition of wiring error of the metering device is processed, so that the labor is saved, the error rate is reduced, and convenience is provided.
According to some embodiments of the invention, further comprising: and the load display module is used for displaying the change condition of the power data within the set time in a curve graph mode. The load change during the fault period can be conveniently and visually observed, and evidence is provided for the electric quantity compensation accounting result.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is one of schematic block diagrams of internal modules of a terminal according to an embodiment of the present invention;
fig. 2 is a second schematic block diagram of internal modules of the terminal according to the embodiment of the present invention;
FIG. 3 is a process of compensating for power consumption in case of a voltage loss fault according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a processing process of the voltage loss compensation electric quantity corresponding to the situation that the three-phase four-wire metering device records electric data in the embodiment of the invention;
fig. 5 is a schematic diagram of a processing process of the voltage loss compensation electric quantity corresponding to the situation that the three-phase three-wire metering device records the electric power data in the embodiment of the invention;
FIG. 6 is a schematic diagram illustrating a process of processing a wiring error and a corresponding compensation power amount according to power detection data according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a front view of a terminal according to an embodiment of the present invention;
FIG. 8 is a vector diagram of phase-loss complete voltage loss of phase A of the three-phase three-wire metering device;
fig. 9 is a vector diagram of phase loss incomplete voltage of phase a of the three-phase three-wire metering device.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Referring to fig. 1, in one embodiment of the present invention, an electric quantity compensation intelligent accounting terminal includes: the device comprises a meter reading module, a fault detection module and an electric quantity compensation module.
The meter reading module is used for communicating with the electric energy metering device, reading electric power data of the electric energy metering device and obtaining the type of the electric energy metering device. The electric power data comprises historical records of electric parameters such as voltage, current, power factor, active power, reactive power and the like, and event records of the electric energy metering device, and if fault records such as voltage loss, current loss and the like exist in the electric energy metering device, fault information such as initial time, duration and the like during voltage loss and current loss faults can be read.
And the electric quantity compensation module is used for constructing a corresponding electric quantity compensation accounting model according to the type of the electric energy metering device and the fault type and obtaining compensation electric quantity through electric power data accounting.
Referring to fig. 2, the fault detection module of the embodiment of the present invention includes: line detection module and decompression detection module. The line detection module is used for acquiring data such as current, voltage, power factor and the like of each single phase from the recorded data, and judging whether fault abnormal behaviors exist or not by utilizing the power factor, voltage and current relation of each phase. In an embodiment of the present invention, the line detection module includes: and the single-phase detection module is used for detecting the voltage, the current and the power factor of the single phase and judging whether the line abnormity occurs.
The voltage loss detection module is used for detecting whether a single-phase voltage loss fault occurs or not, analyzing the type of the voltage loss fault, and judging whether the voltage loss fault is incomplete voltage loss or complete voltage loss. In actual operation, a primary fuse of a voltage transformer of the metering device is often burnt out due to overload, short circuit and the like, so that single-phase voltage loss is caused, and in this situation, if a secondary loop of the metering device is correct and the fault condition is relatively stable, a voltage with relatively stable phase and amplitude fed back by the voltage transformer can be obtained from the voltage loss phase of the metering device, the voltage can be regarded as a residual voltage of the voltage loss phase, the voltage is between (50-60) V, and the voltage is an incomplete voltage loss fault at this time. And if the metering device voltage loss is caused by the open circuit of the secondary circuit, the voltage of the voltage loss phase of the metering device is 0, no residual voltage exists, and the metering device voltage loss fault is a complete voltage loss fault.
Referring to fig. 2, the electric quantity compensation module includes a parameter processing module, a voltage loss processing module and an electric quantity calculation module; in the embodiment of the invention, the three modules are all used for electric quantity compensation calculation processing under the condition of voltage loss fault.
The parameter processing module is used for extracting power data in a fault occurrence period according to the power data, and obtaining power parameters such as each phase voltage, current and power factor in the fault occurrence period, and information such as fault starting time and duration.
And the voltage loss processing module is used for constructing a corresponding calculation model according to the type of the voltage loss fault based on the type of the electric energy metering device to obtain a first voltage loss voltage and a first voltage loss power factor. In an embodiment of the present invention, the voltage loss calculation module includes, according to the type of the electric energy calculation device: the device comprises a first voltage loss calculation module and a second voltage loss calculation module. The first voltage loss calculation module is used for constructing a calculation model of the three-phase four-wire metering device, obtaining a first voltage loss voltage according to the voltage of a non-voltage loss phase in a fault period, and obtaining a corresponding first voltage loss power factor according to the type of a voltage loss fault. If the voltage loss fault is incomplete voltage loss (also called incomplete voltage loss), the first voltage loss power factor is the power factor of a voltage loss phase; otherwise, the voltage is completely lost, and the first voltage loss power factor is the average value of the power factors of the non-voltage loss phases, namely (the power factor of the first non-voltage loss phase + the power factor of the second non-voltage loss phase)/2. The second voltage loss calculation module is used for processing a calculation model of the three-phase three-wire metering device, obtaining a first voltage loss voltage according to the line voltage between non-voltage loss phases during the fault period, and obtaining a corresponding first voltage loss power factor according to the type of the voltage loss fault; if the voltage-loss fault is incomplete voltage loss and the second non-voltage-loss phase is normal in metering, the first power factor of the first element between the voltage-loss phase and the first non-voltage-loss phase is the first voltage-loss power factor; and if the voltage is completely loss of voltage, the line voltage measurement between the loss of voltage phase and the first non-loss of voltage phase is 0, and the first loss of voltage power factor is calculated according to the second power factor of the second element between the first non-loss of voltage phase and the second non-loss of voltage phase.
The electric quantity calculation module obtains a first voltage loss voltage and a first voltage loss power factor, and calculates corresponding compensation electric quantity according to the type of the voltage loss fault.
Referring to fig. 2, the embodiment of the present invention further includes: and the electric power analysis module is used for analyzing the electric power data of the electric energy metering device in the normal wiring state to obtain a first electric power parameter characteristic. The detection module can receive the first power parameter characteristic and detect whether the line is abnormal or not according to the first power parameter characteristic. The electric quantity compensation module can also receive the first electric parameter characteristic, and obtains corresponding compensation electric quantity according to the fault type based on a preset electric quantity compensation analysis model.
Referring to fig. 2, the system further includes a connection determining module, configured to import power detection data about the electric energy metering device, draw a vector diagram, and perform determination and analysis on a connection error condition of the electric energy metering device. The power detection data is used for detecting the metering device by the detection equipment, the collected power parameter data comprises power parameter data information such as voltage, current, power factor and the like of a loop of the metering device, the wiring judgment module generates a vector diagram according to the power detection data, and the wiring judgment module analyzes and judges the wiring condition and other fault problems of the electric energy metering device and provides fault reason analysis for accurate measurement and calculation work of electric quantity compensation of the metering device.
Referring to fig. 2, the electric quantity compensation module according to the embodiment of the present invention further includes a connection error processing module, configured to analyze the electric power detection data and the collected electric power data to obtain a time interval of a connection error fault, and calculate the compensation electric quantity based on a preset electric quantity compensation accounting model according to a first electric power parameter characteristic.
In some embodiments of the present invention, the power detection data and the collected power data are analyzed to obtain a start-stop time of a wiring error fault of the power metering device, the actual power consumption Wy during the fault period is estimated according to the first power parameter characteristic, and the residual power Wx during the fault period is obtained according to the power data of the power metering device, and then the power W to be compensated is Wy-Wx. In an embodiment of the present invention, further comprising: and the load display module is used for displaying the change condition of the power data in the selected time in a curve graph mode, providing data type options and correspondingly displaying the power data such as voltage, current, power factor and the like according to the selection condition of the options.
The meter reading module in the embodiment of the invention comprises: at least one of an infrared meter reading module and an RS485 meter reading module. The infrared meter reading module is used for recording the address of the electric energy metering device and receiving electric power data through an infrared protocol; and the RS485 meter reading module is used for inputting the address of the electric energy metering device and acquiring electric power data according to an ammeter protocol.
The infrared meter reading process comprises the following steps: firstly, inputting the address of the ammeter, selecting the type of the ammeter, then selecting the item needing to return data, aligning the infrared transmitting head to the infrared receiving area of the ammeter, and clicking 'confirm', thus receiving the needed data. The RS485 meter reading process comprises the following steps: the terminal of the embodiment of the invention is connected with an external RS485 line and then is correctly connected with an RS485 ammeter. And during reading, selecting a 485 meter reading function, inputting an electric meter address, selecting parameters to be read according to the electric meter protocol, and displaying the received data information on a data display interface of the terminal. In some embodiments of the present invention, the terminal further includes a USB module, which is used for connecting with a computer to export the copied power data and the form record data of the electric quantity compensation accounting in the terminal, so as to facilitate the processing of the service data by the staff.
In an embodiment of the present invention, referring to fig. 7, the front side of the intelligent electric quantity compensation accounting terminal is provided with a receiver, a front camera, a touch screen and a soft rubber key, and the intelligent electric quantity compensation accounting terminal internally includes a processor, a storage module, a display, a meter reading function module, a data exchange interface, and the like. The meter reading function module is used for reading electric power data collected by the electric energy metering device, the processor is used for processing the operations of analysis, fault type judgment, electric quantity compensation accounting and the like of the electric power data, the storage stores collected electric power data information and analysis and calculation results, the display displays a vector diagram of the data detected by the metering device, a wiring analysis and judgment result and the electric power data, the data exchange external interface is used for connecting external equipment, such as USB storage equipment and a computer, and is used for exporting form recording data of the electric quantity compensation accounting, and service data processing is facilitated for workers. The back of the intelligent electric quantity compensation accounting terminal is provided with a rear camera, a battery cover and a loudspeaker; the side surface also comprises a peripheral interface and a scanning head.
In an embodiment of the present invention, referring to fig. 3, the electric quantity compensation processing method includes: acquiring power data through an electric energy metering device, and judging whether a line has a voltage loss fault; based on the type of the electric energy metering device, constructing a corresponding electric quantity compensation accounting model according to the type of the voltage loss fault, and obtaining a first voltage loss voltage and a first voltage loss power factor through electric power data; and obtaining corresponding compensation electric quantity based on the type of the voltage loss fault according to the first voltage loss voltage and the first voltage loss power factor. In the embodiment of the present invention, the power data may be acquired by carrier, infrared, RS485, and the like, and the power data includes, but is not limited to: the fault start time, the fault end time, the voltage, the current and the power factor of the electric energy metering device.
In an embodiment of the present invention, the decompression failure is divided into an incomplete decompression and a complete decompression. In the power transmission process, a primary fuse of the voltage transformer is often burned out due to overload, short circuit and the like, so that single-phase voltage loss is caused, and if a secondary circuit of the electric energy metering device is correct and the fault condition is relatively stable, a voltage with relatively stable phase and amplitude fed back by the voltage transformer can be obtained from the voltage loss phase of the metering device, the voltage can be regarded as a residual voltage of the voltage loss phase, and the residual voltage is usually between (50-60) V, namely, the voltage is not completely lost. If the voltage loss of the electric energy metering device is caused by the open circuit of the secondary loop, the voltage of the voltage loss phase is 0, and the residual voltage does not exist, namely the voltage loss is complete. The following describes the process of compensating for the electric quantity in the event of a voltage loss fault, taking a three-phase four-wire metering device and a three-phase metering device as examples.
If the electric energy metering device is a three-phase four-wire metering device, the processing process of the compensation electric quantity in the voltage-loss fault refers to fig. 4. Acquiring a voltage-loss phase when a voltage-loss fault of a single phase is detected; obtaining a first voltage loss voltage, wherein the first voltage loss voltage is an average value of the voltage of the first non-voltage loss phase and the voltage of the second non-voltage loss phase, namely: first voltage loss (voltage of first non-voltage loss phase + voltage of second non-voltage loss phase)/2. And judging the type of the voltage-loss fault, and taking a corresponding value according to the type of the voltage-loss fault by the first voltage-loss power factor. If the voltage loss fault is incomplete voltage loss, the first voltage loss power factor is the power factor of a voltage loss phase; otherwise, the voltage loss fault is complete voltage loss, and the first voltage loss power factor is the average value of the power factor of the first non-voltage loss phase and the power factor of the second non-voltage loss phase.
If the voltage loss fault is complete voltage loss, obtaining the compensation electric quantity according to a formula (one):
if the voltage loss fault is incomplete voltage loss, obtaining the compensation electric quantity according to a formula (two):
in the formula (one) and the formula (two), W(n)Accumulating the electric quantity to be compensated during N times of voltage loss faults, wherein N is the loop multiplying power measured by the electric energy measuring device, I(i)Is the current value of the voltage loss phase during the ith voltage loss fault period, TiFor the ith voltage loss fault duration, U(i)Is the first voltage loss during the ith voltage loss fault, cos phi(i)Is a first loss of voltage power factor, W ', during the ith loss of voltage fault'(i)Is as followsThe amount of charge in the loss of voltage phase during i loss of voltage faults.
Next, assuming that a voltage-loss fault occurs in the a-phase in the three-phase four-wire metering device, the compensation electric quantity calculation process is described in detail in two cases according to the type of the voltage-loss fault.
The first condition is as follows: full loss of phase A, i.e. UaWhen the voltage loss fault period is not the nth voltage loss fault period, the average value of the power factor of the phase B and the power factor of the phase C in the same time period is used as a first voltage loss power factor for calculating the additional electric quantity, wherein the residual voltage does not exist, and the power factor data of the phase A in the voltage loss fault period cannot be acquired; the voltage of the phase A cannot be measured during the voltage loss fault period, so the average value of the voltage of the phase B and the voltage of the phase C in the same period of the fault period is used as the first voltage loss voltage for calculating the additional electric quantity, and the phase voltage is zero, so the electric quantity of the phase is less measured during the fault period, and then the additional electric quantity calculation formula is obtained:
W(n)＝N×∑(U(a,n)×I(a,n)×cosφ(a,n)×Tn) Formula (III)
In the formula (III), U(a,n)＝(U(b,n)+U(c,n)) /2, wherein U(b,n)Is the voltage value of the B phase during the nth voltage loss fault, U(c,n)Is the voltage value of the C phase during the nth voltage loss fault(a,n)A derived value (namely, a first voltage loss voltage) of the voltage value of the phase A during the nth voltage loss fault; cos phi(a,n)＝(cosφ(b,n)+cosφ(c,n)) /2, wherein cos φ(b,n)Is the power factor of phase B during the nth voltage loss fault, cos phi(c,n)Is the power factor of the C phase during the nth voltage loss fault, cos phi(a,n)A derived value of the A-phase power factor (namely, a first voltage-loss power factor) during the nth voltage-loss fault; i is(a,n)Is the current value of phase A during the nth voltage loss faultnThe nth voltage loss fault duration is N, the multiplying power of a metering loop of the three-phase four-wire metering device is W(n)And accumulating the electric quantity needing to be supplemented for the period of n times of voltage loss faults. According to the formula (III), the electric quantity required to be subjected to compensation calculation during the phase A total voltage loss period can be calculated. It will be appreciated that the formula (three) is in factThe phase change expression of the formula (one).
Case two: incomplete decompression of phase A, UaAnd not equal to 0, when residual voltage exists, the power factor of the phase A during the fault period can be read as a first voltage-loss power factor for calculating the compensation electric quantity, the voltage derivation value of the phase A (namely, the first voltage-loss voltage) adopts the average value of the power factor of the phase B and the power factor of the phase C in the same time period during the nth voltage-loss fault period as a power factor parameter for calculating the compensation electric quantity, and the compensation electric quantity calculation formula is as follows:
W(n)＝N×∑(U(a,n)×I(a,n)×cosφ(a,n)×Tn)-∑W'(a,n)formula (IV)
In the formula (III), U(a,n)＝(U(b,n)+U(c,n)) /2, wherein U(b,n)Is the voltage value of the B phase during the nth voltage loss fault, U(c,n)Is the voltage value of the C phase during the nth voltage loss fault(a,n)A derived value (namely, a first voltage loss voltage) of the voltage value of the phase A during the nth voltage loss fault; cos phi(a,n)Is the power factor of phase A during the nth voltage loss fault, I(a,n)Is the current value of phase A during the nth voltage loss faultnThe nth voltage loss fault duration is N, the multiplying power of a metering loop of the three-phase four-wire metering device is W(n)∑ W 'is the accumulated electric quantity needing compensation during n times of voltage loss faults'(a,n)Is the total residual electric quantity, W ', accumulated by the phase A during the period of n voltage loss faults'(a,n)The A-phase residual capacity stored by the metering device during the nth voltage loss fault is obtained. According to the formula (IV), the electric quantity required to be subjected to compensation calculation during the phase A total voltage loss period can be calculated. It should be understood that equation (four) is actually a phase-change expression of equation (two).
If the electric energy metering device is a three-phase three-wire metering device, the processing process of the compensation electric quantity in the voltage-loss fault refers to fig. 5. Acquiring a voltage-loss phase when a voltage-loss fault of a single phase is detected; and acquiring a first voltage loss voltage which is the line voltage between a first non-voltage loss phase and a second non-voltage loss phase, wherein the second non-voltage loss phase is measured normally. Judging the type of the voltage-loss fault, and obtaining the first voltage-loss power factor according to the type of the voltage-loss faultThe corresponding value. If the voltage-loss fault is incomplete voltage loss, the first voltage-loss power factor is the first power factor of the first element between the voltage-loss phase and the first non-voltage-loss phase. Otherwise, the voltage-loss fault is complete voltage loss, and the first voltage-loss power factor is calculated according to a second power factor of a second element between the first non-voltage-loss phase and a second non-voltage-loss phase. At this time, cos phi(i)＝cos(30°+φi) Wherein phi isi＝30°-arccosφ(cb,i)，cosφ(i)A first voltage loss power factor during the ith voltage loss fault, b and c are respectively a first non-voltage loss phase and a second non-voltage loss phase in the three-phase three-wire metering device(cb,i)Is a second power factor, phi, of a second element between a first non-voltage-loss phase and a second non-voltage-loss phase during an ith voltage-loss faultiIs the phase angle between the line voltage between the voltage-lost phase and the first non-voltage-lost phase and the current of the voltage-lost phase. Then, acquiring corresponding compensation electric quantity based on the type of the voltage loss fault; if the voltage loss fault is complete voltage loss, calculation is carried out through the formula (I), otherwise, calculation is carried out through the formula (II) for incomplete voltage loss.
In the following, assuming that a phase a has a voltage loss fault and a phase C has a normal measurement in the three-phase three-wire measurement device, the compensation electric quantity calculation process will be described in detail in two cases according to the type of the voltage loss fault.
The first condition is as follows: line voltage U between metering circuit A phase and B phaseabAt 0, i.e. no residual voltage, the corresponding vector diagram refers to fig. 8. Because the A phase is totally voltage-loss and the electricity quantity used by the A phase is not measured in the fault period, the electricity quantity needing to be supplemented is the electricity quantity used by the A phase in the voltage-loss fault period, and the supplementing calculation formula is as follows:
W(n)＝N×∑(U(ab,n)×I(a,n)×cosφ(n)×Tn) Formula (five)
In the formula (V), U(ab,n)＝U(cb,n)Wherein, U(ab,n)For a derived value of line voltage between the A phase and the B phase of the metering circuit during the nth voltage loss fault (i.e. the first voltage loss), U(cb,n)The line voltage between the phase C and the phase B is in the same period during the fault; cos phi(n)Deriving a value for a first power factor of the first element between the a phase and the B phase (i.e., a first loss of voltage power factor) during the nth loss of voltage fault; i is(a,n)Is the current value of phase A during the nth voltage loss faultnFor the nth voltage loss fault duration, N is the multiplying power of the metering loop of the three-phase three-wire metering device, W(n)And accumulating the electric quantity needing to be supplemented for the period of n times of voltage loss faults. For cos phi(n)The derived value U of the line voltage between the A phase and the B phase during the nth voltage loss fault cannot be obtained(ab,n)Phase current value I of A phase(a,n)Phase angle phi betweennThe value of the first power factor of the first component between the A and B phases cos φ cannot be obtained(n)＝cos(30°+φn) Therefore, the values of the first power factors of the phase A and the phase B during the fault are derived according to the second power factors of the second elements of the phase C and the phase B at the same time interval during the nth voltage loss fault, and the second power factors of the phase C and the phase B are cos phi(cb,n)＝cos(30°-φn) Calculating the line voltage U of the C phase and the B phase(cb,n)Phase angle phi with respect to phase C current Icn＝30°-arccosφ(cb,n)Since the phase angle of the three-phase three-wire line voltage and the current of the corresponding phase are corresponding, phi isnIs also the line voltage derivation value U between the A phase and the B phase(ab,n)Phase current value I of A phase(a,n)Phase angle phi betweennThen the first loss-of-voltage power factor of phase A and phase B during the nth loss-of-voltage fault is cos φ(n)＝cos(30°+φn). According to the formula (V), the accumulated electric quantity required to be subjected to compensation calculation in the A-phase full-voltage-loss fault period of the three-phase three-wire metering device can be calculated. It should be understood that equation (five) is actually a phase-change expression of equation (one).
Case two: line voltage U between metering circuit A phase and B phaseabNot equal to 0, a residual voltage exists, and in this case, the vector diagram refers to fig. 9. The metering device has a failure of phase A, but has a residual voltage, the electric quantity metered under the residual voltage during the failure period is the electric quantity actually used during the failure period minus the electric quantity metered under the residual voltage, and the electric quantity compensation accounting is carried out during the failure period because the A-phase voltage loss failure has the residual voltageThe formula is as follows:
W(n)＝N×∑(U(ab,n)×I(a,n)×cosφ(n)×Tn)-∑W'(ab,n)formula (six)
In the formula (VI), U(ab,n)＝U(cb,n)Wherein, U(ab,n)For a derived value of line voltage between the A phase and the B phase of the metering circuit during the nth voltage loss fault (i.e. the first voltage loss), U(cb,n)The line voltage between the phase C and the phase B is in the same period during the fault; cos phi(n)A first power factor of a first element between the A phase and the B phase (i.e. a first loss of voltage power factor) during the nth loss of voltage fault; i is(a,n)Is the current value of phase A during the nth voltage loss faultnFor the nth voltage loss fault duration, N is the multiplying power of the metering loop of the three-phase three-wire metering device, W(n)∑ W 'is the accumulated electric quantity needing compensation during n times of voltage loss faults'(ab,n)Is total residual electric quantity W 'accumulated by phase A during n times of voltage loss faults'(ab,n)The A-phase residual capacity stored by the metering device during the nth voltage loss fault is obtained. According to the formula (VI), the electric quantity accumulated by the three-phase three-wire metering device in the A-phase fault period and required to be subjected to compensation calculation can be calculated. It should be understood that equation (six) is actually a phase-change expression of equation (two).
In an embodiment of the present invention, referring to fig. 6, the electric quantity compensation processing method further includes: and importing electric power detection data of the electric energy metering device, analyzing the electric power detection data, and judging whether the electric energy metering device has wiring errors. And when a wiring error is detected, extracting the same characteristics according to the power detection data and the power data, acquiring a time interval of the wiring fault, and acquiring the compensation power based on a preset power compensation accounting model according to the first power parameter characteristics. The method for obtaining the first power parameter characteristic comprises the following steps: and acquiring the electric power data of the electric energy metering device in the normal connection state from all the electric power data, and analyzing and processing to obtain the first electric power parameter characteristic of the electric energy metering device. And estimating the actual electricity consumption Wy during the fault period according to the first electric power parameter characteristic and the starting and ending time of the wiring error fault of the electric energy metering device, obtaining the recorded residual electric quantity Wx during the fault period according to the electric power data of the electric energy metering device, and obtaining the electric quantity W which needs to be supplemented as Wy-Wx.
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 and method may be implemented in other ways. For example, the above-described system embodiments 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 may be integrated into another system, or some features may be omitted, or not executed. 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 unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, 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, etc. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides an electric quantity chases after and mends intelligent accounting terminal which characterized in that includes:
the meter reading module is used for reading the electric power data of the electric energy metering device and acquiring the type of the electric energy metering device;
the fault detection module is used for analyzing whether a fault occurs and the fault type according to the power data;
and the electric quantity compensation module is used for constructing a corresponding electric quantity compensation accounting model according to the type of the electric energy metering device and the fault type, and accounting the compensation electric quantity.
2. The intelligent accounting terminal of electric quantity compensation according to claim 1, wherein the fault detection module comprises:
the line detection module is used for acquiring single-phase power factors, voltage and current according to the electric power data and judging whether line abnormity occurs or not;
and the voltage loss detection module is used for detecting the single-phase voltage, judging whether a voltage loss fault occurs or not and judging whether the type of the voltage loss fault is one of complete voltage loss or incomplete voltage loss or not.
3. The intelligent accounting terminal for electric quantity compensation according to claim 2, wherein the line detection module comprises:
and the single-phase detection module is used for detecting the relation among the power factor, the voltage and the current of the single phase and judging whether the circuit is abnormal or not.
4. The intelligent accounting terminal is mended to electric quantity according to claim 2, characterized in that, the electric quantity mends the module and includes:
the parameter extraction module is used for extracting the power data during the fault occurrence period according to the power data;
the voltage loss processing module is used for constructing a corresponding calculation model according to the type of the voltage loss fault based on the type of the electric energy metering device to obtain a first voltage loss voltage and a first voltage loss power factor;
and the electric quantity calculation module is used for obtaining the corresponding compensation electric quantity based on the type of the voltage loss fault according to the first voltage loss voltage and the first voltage loss power factor.
5. The intelligent electric quantity compensation accounting terminal of claim 4, wherein the voltage loss processing module comprises:
the first voltage loss calculation module is used for constructing a calculation model of the three-phase four-wire metering device, obtaining a first voltage loss voltage according to the voltage of a non-voltage loss phase during a fault period, and obtaining a corresponding first voltage loss power factor according to the type of the voltage loss fault;
and the second voltage loss calculation module is used for constructing a calculation model of the three-phase three-wire metering device, obtaining the first voltage loss voltage according to the line voltage between non-voltage loss phases and obtaining the corresponding first voltage loss power factor according to the type of the voltage loss fault.
6. The intelligent electric quantity compensation accounting terminal of claim 1, wherein the meter reading module comprises at least one of the following modules:
the infrared meter reading module is used for recording the address of the electric energy metering device and receiving the electric power data through an infrared protocol;
and the RS485 meter reading module is used for inputting the address of the electric energy metering device and acquiring the electric power data according to an ammeter protocol.
7. The intelligent accounting terminal is mended to electric quantity according to claim 1, characterized by further comprising:
and the wiring judgment module is used for importing the electric power detection data of the electric energy metering device, drawing a vector diagram of the electric energy metering device and judging and analyzing the wiring error condition.
8. The intelligent accounting terminal is mended to electric quantity according to claim 7, characterized by further comprising:
and the electric power analysis module is used for analyzing the electric power data of the electric energy metering device in a normal wiring state to obtain a first electric power parameter characteristic.
9. The intelligent accounting terminal is mended to electric quantity according to claim 8, characterized in that, the electric quantity mends the module and still includes:
and the wiring error processing module is used for analyzing according to the electric power detection data and the electric power data to obtain a time interval of a wiring error fault, and obtaining the compensation electric quantity based on a preset electric quantity compensation accounting model according to the first electric power parameter characteristic.
10. The intelligent accounting terminal is mended to electric quantity according to claim 1, characterized by further comprising:
and the load display module is used for displaying the change condition of the power data in the selected time in a curve graph mode.
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| CN112327241A (en) * | 2020-10-29 | 2021-02-05 | 国网山东省电力公司夏津县供电公司 | Metering device wrong wiring analysis method and system based on internal data of electric energy meter |
| CN112485752A (en) * | 2020-11-25 | 2021-03-12 | 国网北京市电力公司 | Intelligent electric energy meter compensation electric quantity calculation method, system, device and storage medium |
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