CN115561517B - Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity - Google Patents
Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity Download PDFInfo
- Publication number
- CN115561517B CN115561517B CN202211546161.1A CN202211546161A CN115561517B CN 115561517 B CN115561517 B CN 115561517B CN 202211546161 A CN202211546161 A CN 202211546161A CN 115561517 B CN115561517 B CN 115561517B
- Authority
- CN
- China
- Prior art keywords
- phase
- electric quantity
- voltage
- current
- split
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a method, a device and equipment for determining split-phase electric quantity of three-phase electric quantity, belonging to the technical field of electric energy metering, wherein the method comprises the following steps: acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments; for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values; and obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity. The method of the embodiment of the invention considers the unbalanced condition of the split-phase electric quantity, and the determined split-phase electric quantity has higher accuracy.
Description
Technical Field
The present invention relates to the field of electric energy metering technologies, and in particular, to a method, an apparatus, and a device for determining split-phase electric energy of three-phase electric energy.
Background
Along with the progress of the power grid informatization, the power grid enters an information age through manual meter reading and charging, the types and the amounts of the electric power data are gradually expanded, and the data quality plays a vital role in the analysis effect of the electric power data, so that higher requirements are provided for the data management work of the collected data and the electric power files.
At present, in data collected by taking a station area as a unit in a power system, three-phase electric quantity is related, only the total electric quantity of the three-phase electric quantity of a sub-meter is related, and the split-phase electric quantity of each phase of the sub-meter is not related. The split-phase electric quantity of each phase of the sub-table is known accurately, so that the method has important significance on the data model. In practical applications, the total electric quantity is mostly distributed to the split-phase electric quantity on average based on the principle of three-phase equalization, and the accuracy of the obtained result is low because three phases are unbalanced in practice.
Disclosure of Invention
The invention provides a method, a device and equipment for determining split-phase electric quantity of three-phase electric quantity, which are used for solving the defect of lower split-phase electric quantity distribution accuracy in the prior art and realizing the method for determining the three-phase electric quantity with higher accuracy.
The invention provides a split-phase electric quantity determining method of three-phase electric quantity, which comprises the following steps:
acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments;
for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
and obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity.
According to the method for determining the split-phase electric quantity of the three-phase electric quantity provided by the invention, the method for determining the split-phase electric quantity distribution coefficient based on the voltage and the current at the plurality of sampling moments and the change rule of the voltage and the current in the sampling interval comprises the following steps:
determining the voltage and the current in at least one sampling interval based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval;
integrating the voltage and the current in each sampling interval to obtain initial split-phase electric quantity;
the split phase power distribution coefficient is determined based on the initial split phase power of each split phase.
According to the split-phase electric quantity determining method of the three-phase electric quantity, provided by the invention, the change rule of the voltage follows a linear rule, the change rule of the current follows a rule of a piecewise constant value, and the voltage and the current in at least one sampling interval are determined based on the voltage and the current at the plurality of sampling moments and the change rule of the voltage and the current in the sampling interval, and the method comprises the following steps:
determining a voltage within at least one sampling interval using a linear interpolation algorithm based on the voltages at the plurality of sampling instants;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
According to the split-phase electric quantity determining method of the three-phase electric quantity, provided by the invention, the change rule of the voltage follows the rule of the segment constant value, the change rule of the current follows the rule of the segment constant value, and the voltage and the current in at least one sampling interval are determined based on the voltage and the current at the plurality of sampling moments and the change rule of the voltage and the current in the sampling interval, and the method comprises the following steps:
determining a voltage within at least one sampling interval based on the voltages at the plurality of sampling instants and a second segment constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
According to the split-phase electric quantity determining method of the three-phase electric quantity, provided by the invention, the change rule of the voltage follows the piecewise constant rule, the change rule of the current follows the linear rule, and the voltage and the current in at least one sampling interval are determined based on the voltage and the current at the plurality of sampling moments and the change rule of the voltage and the current in the sampling interval, and the method comprises the following steps:
determining a voltage within at least one sampling interval based on the voltages at the plurality of sampling instants and a second segment constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
based on the currents at the plurality of sampling instants, a current in at least one sampling interval is determined using a linear interpolation algorithm.
According to the split-phase electric quantity determining method of the three-phase electric quantity provided by the invention, the voltage in at least one sampling interval is determined by utilizing a linear interpolation algorithm based on the voltages at the plurality of sampling moments, and the method comprises the following steps:
for any sampling interval, the voltage within the sampling interval is determined using the following equation (1):
the determining the current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function includes:
determining the current in the sampling interval using the following equation (2):
wherein, the liquid crystal display device comprises a liquid crystal display device,，in order to obtain the acquisition interval,、respectively at the moment of timeThe current and the voltage to be collected,、respectively at the moment of timeThe current and voltage collected.
According to the method for determining the split-phase electric quantity of the three-phase electric quantity provided by the invention, the voltage and the current in each sampling interval are subjected to integral processing to obtain the initial split-phase electric quantity, and the method comprises the following steps:
obtaining the initial split-phase electric quantity by using the following formula (3);
。
according to the split-phase electric quantity determining method of the three-phase electric quantity provided by the invention, the split-phase electric quantity distribution coefficient is determined based on the initial split-phase electric quantity of each split phase, and the method comprises the following steps:
and dividing the initial phase-splitting electric quantity of any phase splitting by the sum of the initial phase-splitting electric quantities of all phase splitting to obtain the phase-splitting electric quantity distribution coefficient of the phase splitting.
According to the method for determining the split-phase electric quantity of the three-phase electric quantity provided by the invention, the actual split-phase electric quantity of each split phase is obtained based on the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity, and the method comprises the following steps:
and taking the product of the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity as the actual split-phase electric quantity of each split phase.
The invention also provides a split-phase electric quantity determining device of the three-phase electric quantity, which comprises the following steps:
the acquisition module is used for acquiring the voltage and the current of each split phase in the three phases at a plurality of sampling moments;
the processing module is used for determining split-phase electric quantity distribution coefficients according to any split phase and based on the voltages and currents at the sampling moments and the change rule of the voltages and currents in the sampling intervals; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
the processing module is further used for obtaining the actual phase-splitting electric quantity of each phase-splitting based on the phase-splitting electric quantity distribution coefficient of each phase-splitting and the three-phase total electric quantity.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the split-phase electric quantity determining method of the three-phase electric quantity when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a split-phase power determination method of three-phase power as described in any one of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a method of split-phase charge determination of a three-phase charge as described in any one of the above.
The method, the device and the equipment for determining the split-phase electric quantity of the three-phase electric quantity provided by the invention are characterized in that the voltage and the current of each split phase in three phases at a plurality of sampling moments are obtained; for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values; the obtained split-phase electric quantity distribution coefficient is more in line with the actual condition of the split phase because of considering the change rule of the voltage and the current of the split phase; and the actual phase-separated electric quantity of the phase separation is obtained based on the phase-separated electric quantity distribution coefficient and the three-phase total electric quantity, so that the accuracy is higher, namely the scheme fully considers the imbalance of the electric quantity of each phase separation, and compared with the simple average electric quantity in the prior art, the accuracy of the phase-separated electric quantity is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for determining split-phase electric quantity of three-phase electric quantity according to the present invention;
FIG. 2 is a schematic diagram of current in sampling intervals of a split-phase power determination method of three-phase power according to the present invention;
FIG. 3 is a schematic diagram of voltages within a sampling interval of a split-phase power determination method of three-phase power according to the present invention;
FIG. 4 is a schematic diagram of a split-phase power determining device for three-phase power according to the present invention;
fig. 5 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Currently, the way to average the total three-phase power to each phase based on the assumption of three-phase equalization to obtain the split-phase power is not very accurate. Because in practice the three phases are not balanced. For example, three phases may be very unbalanced at each sampling interval, and the degree of imbalance is very different from sampling interval to sampling interval, and thus cannot be simply equally distributed.
The following describes the technical solution of the embodiment of the present invention in detail with reference to the specific embodiments of fig. 1 to 5. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 is a schematic flow chart of a split-phase electric quantity determining method of three-phase electric quantity provided by the invention. As shown in fig. 1, the method provided in this embodiment includes:
step 101, obtaining the voltage and current of each split phase in three phases at a plurality of sampling moments;
specifically, in the embodiment of the invention, the voltage and the current at other moments in the sampling interval are estimated by using the collected phase-separated voltage and current data, the phase-separated electric quantity is estimated, the phase-separated electric quantity distribution coefficient is calculated by using the estimated phase-separated electric quantity, and the actual phase-separated electric quantity is determined by using the phase-separated electric quantity distribution coefficient and the three-phase total electric quantity, so that the accuracy of the phase-separated electric quantity can be greatly improved.
For example, at a sampling interval, the split-phase current, voltage are as shown in FIGS. 2 and 3, at timeThe collected current and voltage are respectively、At the moment ofThe collected current and voltage are respectively、The acquisition interval is。
102, aiming at any split phase, carrying out integration processing based on voltages and currents at a plurality of sampling moments to obtain initial split phase electric quantity;
specifically, for any split phase, according to the change rule of the voltage and the current, the voltage and the current in the sampling interval are determined based on the voltage and the current at a plurality of sampling moments, and then the split phase electric quantity distribution coefficient is determined based on the voltage and the current. For example, an initial phase-separated power amount of each phase-separated is determined based on the voltage and the current, and a phase-separated power distribution coefficient of each phase-separated is determined using the initial phase-separated power amount of each phase-separated.
For example, the phase-separated power distribution coefficient of each phase is determined to beWherein, the method comprises the steps of, wherein,for the initial phase-splitting power of the current phase-splitting,andthe initial split-phase charges of the other two phases respectively.
Step 103, obtaining the actual phase-splitting electric quantity of each phase splitting based on the initial phase-splitting electric quantity and the three-phase total electric quantity.
Specifically, based on the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity, the actual split-phase electric quantity of each split phase is obtained, for example, the three-phase total electric quantity isPThe actual split-phase electric quantity is。
The method of the embodiment comprises the steps of obtaining the voltage and the current of each split phase in three phases at a plurality of sampling moments; for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values; the obtained split-phase electric quantity distribution coefficient is more in line with the actual condition of the split phase because of considering the change rule of the voltage and the current of the split phase; and the actual phase-separated electric quantity of the phase separation is obtained based on the phase-separated electric quantity distribution coefficient and the three-phase total electric quantity, so that the accuracy is higher, namely the scheme fully considers the imbalance of the electric quantity of each phase separation, and compared with the simple average electric quantity in the prior art, the accuracy of the phase-separated electric quantity is improved.
Alternatively, step 102 may be implemented as follows:
determining the voltage and the current in at least one sampling interval based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval;
integrating the voltage and the current in each sampling interval to obtain initial split-phase electric quantity;
the split phase power distribution coefficient is determined based on the initial split phase power of each split phase.
Specifically, since the current and the voltage follow a certain change rule in the sampling interval, the current and the voltage in the sampling interval can be obtained through the current, the voltage and the change rule at the sampling moment.
The obtained voltage and current are utilized to integrate, the estimated phase-separated electric quantity is obtained, the estimated phase-separated electric quantity is utilized to calculate the phase-separated electric quantity distribution coefficient, the phase-separated electric quantity distribution is carried out by using the phase-separated electric quantity distribution coefficient, and the accuracy of the phase-separated electric quantity distribution can be greatly improved.
Alternatively, the voltage and current within at least one sampling interval may be determined in several ways:
mode 1:
under the condition that the change rule of the voltage follows a linear rule and the change rule of the current follows a rule of a piecewise constant value, determining the voltage in at least one sampling interval by utilizing a linear interpolation algorithm based on the voltages at a plurality of sampling moments;
determining a current within at least one sampling interval based on the currents at the plurality of sampling instants and the first piecewise constant function; the function value of the first piecewise constant function over each sampling interval includes: the sampling interval contains the current at the sampling instant.
Specifically, the first piecewise constant function is divided into two segments within each sampling interval, for example, with the function value of the first segment being equal to the current at the beginning sampling instant of the sampling interval and the function value of the second segment being equal to the current at the ending sampling instant of the sampling interval, as shown in fig. 2.
The segmentation instant of the segmentation function may be the midpoint of the two sampling instants.
In other embodiments, the segmentation time of the segmentation function may be other time, which is not limited by the embodiment of the present invention.
Optionally, for any sampling interval, the voltage within the sampling interval is determined using the following equation (1):
determining the current in the sampling interval using the following equation (2):
wherein, the liquid crystal display device comprises a liquid crystal display device,，in order to obtain the acquisition interval,、respectively at the moment of timeThe current and the voltage to be collected,、respectively at the moment of timeThe current and voltage collected.
Mode 2:
under the condition that the change rule of the voltage follows the rule of the segment constant value and the change rule of the current follows the rule of the segment constant value, determining the voltage in at least one sampling interval based on the voltages at a plurality of sampling moments and a second segment constant value function; the function value of the second segment constant function within each sampling interval includes: the sampling interval contains the voltage at the sampling moment;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and the first piecewise constant function; the function value of the first piecewise constant function over each sampling interval includes: the sampling interval contains the current at the sampling instant.
Specifically, the first piecewise constant function is divided into two segments within each sampling interval, for example, with the function value of the first segment being equal to the current at the beginning sampling instant of the sampling interval and the function value of the second segment being equal to the current at the ending sampling instant of the sampling interval, as shown in fig. 2.
The second segment constant function is divided, for example, into two segments within each sampling interval, the function value of the first segment being equal to the voltage at the beginning sampling instant of the sampling interval and the function value of the second segment being equal to the voltage at the ending sampling instant of the sampling interval.
The segmentation instant of the segmentation function may be the midpoint of the two sampling instants.
In other embodiments, the segmentation time of the segmentation function may be other time, which is not limited by the embodiment of the present invention.
Optionally, for any sampling interval, the voltage within the sampling interval is determined using the following equation (4):
determining the current in the sampling interval using the following equation (2):
wherein, the liquid crystal display device comprises a liquid crystal display device,，in order to obtain the acquisition interval,、respectively at the moment of timeThe current and the voltage to be collected,、respectively at the moment of timeThe current and voltage collected.
Mode 3:
determining a voltage in at least one sampling interval based on the voltages at the plurality of sampling moments and a second piecewise constant function under the condition that the change rule of the voltage follows a piecewise constant rule and the change rule of the current follows a linear rule; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
based on the currents at the plurality of sampling instants, a current in at least one sampling interval is determined using a linear interpolation algorithm.
In particular, the second segment constant function is divided into two segments, for example, within each sampling interval, the function value of the first segment being equal to the voltage at the sampling instant at the beginning of the sampling interval and the function value of the second segment being equal to the voltage at the sampling instant at the end of the sampling interval.
The segmentation instant of the segmentation function may be the midpoint of the two sampling instants.
In other embodiments, the segmentation time of the segmentation function may be other time, which is not limited by the embodiment of the present invention.
Optionally, for any sampling interval, the voltage within the sampling interval is determined using the following equation (4):
determining the current in the sampling interval using the following equation (5):
wherein, the liquid crystal display device comprises a liquid crystal display device,，in order to obtain the acquisition interval,、respectively at the moment of timeThe current and the voltage to be collected,、respectively at the moment of timeThe current and voltage collected.
Alternatively, the initial split-phase electric quantity is obtained by using the following formula (3);
alternatively, for any one phase separation, the initial phase separation electric quantity of the phase separation can be divided by the sum of the initial phase separation electric quantities of all the phase separations to obtain the phase separation electric quantity distribution coefficient of the phase separation.
Alternatively, step 103 may be implemented as follows:
and taking the product of the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity as the actual split-phase electric quantity of each split phase.
For example, the actual phase-separated electric quantity of each phase separation is obtained by using the following formulas (6), (7) and (8), respectively:
wherein, the liquid crystal display device comprises a liquid crystal display device,is the total electric quantity of three phases,for the actual phase-separated charge of the first phase-separation,for the initial phase-separated charge of the first phase-separation,the split-phase power distribution coefficient representing the first split phase,for the actual phase-separated charge of the second phase-separation,for the initial phase-separated charge of the second phase-separation,represents the split-phase power distribution coefficient of the second split phase,for the actual split-phase charge of the third split phase,for the initial phase-separated charge of the third phase-separation,represents the split-phase power distribution coefficient of the third split phase,、andthe initial split-phase electric quantity obtained by using the formula (3) is respectively.
For the split phase in each sampling interval, the split phase electric quantity can be calculated in the mode, so that the obtained split phase electric quantity is more accurate than the average electric quantity, and three-phase imbalance in the sampling interval is fully considered. This lays a good data foundation for the subsequent power model using the data.
In the above embodiment, the initial phase-separated electric quantity obtained by performing linear interpolation and estimating the phase-separated electric quantity based on the phase-separated voltage and current by utilizing the linear change rule is accurate, the phase-separated electric quantity distribution coefficient is calculated by utilizing the estimated initial phase-separated electric quantity, and the actual phase-separated electric quantity is determined by utilizing the obtained phase-separated electric quantity distribution coefficient and the three-phase total electric quantity, so that the accuracy of the phase-separated electric quantity can be greatly improved.
In the embodiment of the present invention, the above formula is merely described as an example, and the above formula may be simply modified, which is not limited thereto.
The split-phase electric quantity determining device for three-phase electric quantity provided by the invention is described below, and the split-phase electric quantity determining device for three-phase electric quantity described below and the split-phase electric quantity determining method for three-phase electric quantity described above can be referred to correspondingly.
Fig. 4 is a schematic structural diagram of a split-phase electric quantity determining device for three-phase electric quantity. As shown in fig. 4, the split-phase electric quantity determining device for three-phase electric quantity provided in this embodiment includes:
an obtaining module 210, configured to obtain voltages and currents of each of the three phases at a plurality of sampling moments;
the processing module 220 is configured to determine, for any split phase, a split phase electric quantity distribution coefficient based on the voltages and currents at the plurality of sampling moments and a change rule of the voltages and currents in the sampling intervals; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
the processing module 220 is further configured to obtain an actual split-phase power of each split phase based on the split-phase power distribution coefficient of each split phase and the total three-phase power.
Optionally, the processing module 220 is specifically configured to:
determining the voltage and the current in at least one sampling interval based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval;
integrating the voltage and the current in each sampling interval to obtain initial split-phase electric quantity;
the split phase power distribution coefficient is determined based on the initial split phase power of each split phase.
Optionally, the processing module 220 is specifically configured to:
the change rule of the voltage follows a linear rule, the change rule of the current follows a rule of a piecewise constant value, and the voltage in at least one sampling interval is determined by utilizing a linear interpolation algorithm based on the voltages at the plurality of sampling moments;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
Optionally, the processing module 220 is specifically configured to:
the change rule of the voltage follows the rule of the segment constant value, the change rule of the current follows the rule of the segment constant value, and the voltage in at least one sampling interval is determined based on the voltages at the plurality of sampling moments and a second segment constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
Optionally, the processing module 220 is specifically configured to:
the change rule of the voltage follows a piecewise constant rule, the change rule of the current follows a linear rule, and the voltage in at least one sampling interval is determined based on the voltages at the plurality of sampling moments and a second piecewise constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
based on the currents at the plurality of sampling instants, a current in at least one sampling interval is determined using a linear interpolation algorithm.
Optionally, the processing module 220 is specifically configured to:
for any sampling interval, the voltage within the sampling interval is determined using the following equation (1):
determining the current in the sampling interval using the following equation (2):
wherein, the liquid crystal display device comprises a liquid crystal display device,，in order to obtain the acquisition interval,、respectively at the moment of timeThe current and the voltage to be collected,、respectively at the moment of timeThe current and voltage collected.
Optionally, the processing module 220 is specifically configured to:
obtaining the initial split-phase electric quantity by using the following formula (3);
optionally, the processing module 220 is specifically configured to:
and dividing the initial phase-splitting electric quantity of any phase splitting by the sum of the initial phase-splitting electric quantities of all phase splitting to obtain the phase-splitting electric quantity distribution coefficient of the phase splitting.
Optionally, the processing module 220 is specifically configured to:
and taking the product of the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity as the actual split-phase electric quantity of each split phase.
The apparatus of the present embodiment may be used to execute the method of any one of the foregoing method embodiments, and specific implementation procedures and technical effects thereof are the same as those in the method embodiments, and specific reference may be made to detailed description in the method embodiments, which is not repeated herein.
Fig. 5 illustrates a physical schematic diagram of an electronic device, as shown in fig. 5, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a split-phase power determination method for a three-phase power, the method comprising: acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments;
for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
and obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of executing a method for determining split-phase electric quantity of three-phase electric quantity provided by the above methods, the method comprising: acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments;
for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
and obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a method of split-phase power determination of three-phase power provided by the above methods, the method comprising: acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments;
for any split phase, determining a split phase electric quantity distribution coefficient based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
and obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A split-phase power determination method for three-phase power, comprising:
acquiring the voltage and current of each split phase in three phases at a plurality of sampling moments;
determining the voltage and the current in at least one sampling interval based on the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval for any phase separation;
integrating the voltage and the current in each sampling interval to obtain initial split-phase electric quantity;
determining the split-phase electric quantity distribution coefficient based on the initial split-phase electric quantity of each split phase; the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
obtaining the actual phase-separated electric quantity of each phase separation based on the phase-separated electric quantity distribution coefficient of each phase separation and the three-phase total electric quantity;
the determining the phase-separated electric quantity distribution coefficient based on the initial phase-separated electric quantity of each phase separation comprises the following steps:
dividing the initial phase-splitting electric quantity of any phase splitting by the sum of the initial phase-splitting electric quantities of all phase splitting to obtain a phase-splitting electric quantity distribution coefficient of the phase splitting;
the phase-splitting electric quantity distribution coefficient and the three-phase total electric quantity based on each phase splitting are used for obtaining the actual phase-splitting electric quantity of each phase splitting, and the method comprises the following steps:
and taking the product of the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity as the actual split-phase electric quantity of each split phase.
2. The method according to claim 1, wherein the voltage change rule follows a linear rule, the current change rule follows a piecewise constant rule, and the determining the voltage and the current in at least one sampling interval based on the voltage and the current at the plurality of sampling moments and the voltage and the current change rule in the sampling interval includes:
determining a voltage within at least one sampling interval using a linear interpolation algorithm based on the voltages at the plurality of sampling instants;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
3. The method according to claim 1, wherein the voltage change rule follows a segment constant rule, the current change rule follows a segment constant rule, and the determining the voltage and the current in at least one sampling interval based on the voltage and the current at the plurality of sampling moments and the voltage and the current change rule in the sampling interval comprises:
determining a voltage within at least one sampling interval based on the voltages at the plurality of sampling instants and a second segment constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
determining a current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function; the function value of the first piecewise constant function within each sampling interval includes: the sampling interval contains the current at the sampling instant.
4. The method according to claim 1, wherein the voltage change rule follows a piecewise constant rule, the current change rule follows a linear rule, and the determining the voltage and the current in at least one sampling interval based on the voltage and the current at the plurality of sampling moments and the voltage and the current change rule in the sampling interval comprises:
determining a voltage within at least one sampling interval based on the voltages at the plurality of sampling instants and a second segment constant function; the function value of the second segment constant function within each sampling interval includes: the sampling interval comprises the voltage at the sampling moment;
based on the currents at the plurality of sampling instants, a current in at least one sampling interval is determined using a linear interpolation algorithm.
5. The method of determining the split-phase electric quantity of the three-phase electric quantity according to claim 2, wherein the determining the voltage in at least one sampling interval by using a linear interpolation algorithm based on the voltages at the plurality of sampling moments includes:
for any sampling interval, the voltage within the sampling interval is determined using the following equation (1):
（1）
the determining the current in at least one sampling interval based on the currents at the plurality of sampling instants and a first piecewise constant function includes:
determining the current in the sampling interval using the following equation (2):
（2）
wherein, the liquid crystal display device comprises a liquid crystal display device,，/>for acquisition interval +.>、/>Respectively at time->The current and the voltage to be collected,、/>respectively at time->The current and voltage collected.
6. The method for determining the split-phase electric quantity of the three-phase electric quantity according to claim 5, wherein the integrating the voltage and the current in each sampling interval to obtain the initial split-phase electric quantity comprises:
obtaining the initial split-phase electric quantity by using the following formula (3);
（3）
wherein, the liquid crystal display device comprises a liquid crystal display device,and (5) the initial split-phase electric quantity is obtained.
7. A split-phase power determining apparatus for three-phase power, comprising:
the acquisition module is used for acquiring the voltage and the current of each split phase in the three phases at a plurality of sampling moments;
the processing module is used for determining the voltage and the current in at least one sampling interval according to the voltage and the current at the sampling moments and the change rule of the voltage and the current in the sampling interval aiming at any phase separation;
integrating the voltage and the current in each sampling interval to obtain initial split-phase electric quantity;
dividing the initial phase-splitting electric quantity of any phase splitting by the sum of the initial phase-splitting electric quantities of all phase splitting to obtain a phase-splitting electric quantity distribution coefficient of the phase splitting;
the change rule of the voltage and the current follows the rule of piecewise constant values, or the rule of linearity and piecewise constant values;
the processing module is further configured to use the product of the split-phase electric quantity distribution coefficient of each split phase and the three-phase total electric quantity as an actual split-phase electric quantity of each split phase.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the split-phase power determination method of the three-phase power of any one of claims 1 to 6 when the program is executed by the processor.
9. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the split-phase power determination method of the three-phase power according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211546161.1A CN115561517B (en) | 2022-12-05 | 2022-12-05 | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211546161.1A CN115561517B (en) | 2022-12-05 | 2022-12-05 | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115561517A CN115561517A (en) | 2023-01-03 |
| CN115561517B true CN115561517B (en) | 2023-08-01 |
Family
ID=84769835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211546161.1A Active CN115561517B (en) | 2022-12-05 | 2022-12-05 | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115561517B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3448735B2 (en) * | 1999-11-05 | 2003-09-22 | 株式会社ユアテック | Multi power meter |
| CN104991212B (en) * | 2015-07-07 | 2017-08-25 | 湖南大学 | A kind of current acquisition passage method for self-calibrating based on least square linear interpolation |
| CN105762818B (en) * | 2016-05-06 | 2018-02-27 | 国网吉林省电力有限公司电力科学研究院 | A kind of user's three-phase imbalance method of adjustment based on Greedy strategy |
| CN111192449B (en) * | 2019-12-26 | 2020-12-01 | 宁波三星智能电气有限公司 | User power consumption determination method and device and electronic equipment |
| CN113075475B (en) * | 2021-03-24 | 2022-12-23 | 南方电网科学研究院有限责任公司 | Phase-splitting identification method and device for electric energy meters in distribution area, terminal and storage medium |
-
2022
- 2022-12-05 CN CN202211546161.1A patent/CN115561517B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115561517A (en) | 2023-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104199058A (en) | Time scale adjusting algorithm based on Kalman filter real-time prediction value | |
| JPWO2008126240A1 (en) | Synchronous phasor measuring device and phase angle difference measuring device between buses using the same | |
| CN109409762A (en) | Based on the harmonic contributions division methods for improving data relation analysis | |
| CN110045186B (en) | System harmonic impedance estimation method and system at power system common connection point | |
| CN104316768A (en) | Negative sequence impedance parameter estimation method for locating three-phase unbalanced disturbance source | |
| CN115512777A (en) | Electrochemical model parameter identification method and system based on capacity change rate | |
| CN115561517B (en) | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity | |
| CN115541993B (en) | Method, device, equipment and storage medium for determining split-phase electric quantity of three-phase electric quantity | |
| CN107782966A (en) | Determine the frequency of AC signal | |
| Papadopoulos et al. | Online parameter identification and generic modeling derivation of a dynamic load model in distribution grids | |
| CN104133188B (en) | Benefit electricity error detection method and system is moved back during the biphase decompression of three-phase and four-line electric energy meter | |
| CN116626490A (en) | Motor fault diagnosis method and device based on Kalman filter | |
| CN109286347B (en) | Method and device for compensating position of rotor of permanent magnet synchronous generator | |
| CN107196292B (en) | Static equivalence method and device for active power distribution network | |
| CN112946498B (en) | Method and device for obtaining electromotive force curve and processor | |
| CN115601198B (en) | Power data simulation method, device, equipment and storage medium | |
| CN109670254B (en) | Interface position selection method and system for electromechanical transient and electromagnetic transient hybrid simulation | |
| WO2017139926A1 (en) | Method and system for detecting dc zero bias of inverter output current | |
| CN109327026B (en) | Low-voltage distribution network interval state estimation method | |
| CN117074778B (en) | Harmonic extraction method and device based on load scene and computer equipment | |
| RU2585930C1 (en) | Method of measurement of insulation resistance in electric networks | |
| CN111506867B (en) | Spline interpolation-based transformer phase-by-phase electric quantity data generation method | |
| CN117406125B (en) | Battery health state confirmation method, device, equipment and storage medium | |
| CN114047408B (en) | High-precision fault location method for power transmission line and related device | |
| CN107968396B (en) | Thevenin equivalent parameter calculation method based on local phasor measurement information |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |