CN115639392B - Electric power instrument with rated secondary current lower than 1A - Google Patents
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Abstract
The invention provides an electric power instrument with rated secondary current lower than 1A, which comprises an electric power instrument body; wherein, the power instrument is internal to be provided with first electric current sampling circuit, first electric current sampling circuit: the power parameter information is used for converting the current of the external power supply into rated secondary current lower than 1A and outputting the power parameter information through the rated secondary current lower than 1A; wherein, the first current sampling loop comprises a milliamp level current transformer. The invention directly converts the electric power instrument into the small current below 1A, converts the large current into the small current below 1A at one time, responds to the national low-carbon policy, reduces the power consumption of the whole electric power secondary circuit, reduces the consumption of copper materials and iron materials of products, and simultaneously can realize better measurement, metering and protection effects of the electric power instrument.
Description
Technical Field
The invention relates to the technical field of charging, in particular to an electric power instrument with rated secondary current lower than 1A.
Background
At present, in power supply equipment, power monitoring is performed through a power instrument, the power instrument is applied to various power equipment or power grids, the power instrument has a great effect, for example, signal acquisition of a power supply can be performed, real-time reaction and measurement of primary side current are performed, circuit protection and alarm are performed, large current is converted into small current, in the process, the primary large current is converted into rated secondary small current of 1A or 5A, and in order to convert the primary large current into small current lower than 1A, the rated secondary small current of 1A or 5A needs to be converted secondarily, so that the small current lower than 1A can be obtained.
The rated secondary current standard values are 1A and 5A, which are relatively strong current signals, and in a current transformer with rated secondary current lower than 1A, which is disclosed in patent No. CN2022101601119. K, the novel transformer is provided, but the transformer only has the protection current function, and the existing power instrument cannot detect power under the condition that the rated current is lower than 1A, and the power detection accuracy is not high, so the invention provides the power instrument.
Disclosure of Invention
The invention provides an electric power instrument with rated secondary current lower than 1A, which is used for solving the problems that in a current transformer with rated secondary current lower than 1A in the patent CN2022101601119. K, only the novel transformer is provided, but the transformer only has the protection current function and the acquisition of circuit information cannot be realized.
An electrical power meter rated for a secondary current below 1A, comprising:
an electric power meter body; wherein,,
the electric power instrument is internal to be provided with first electric current sampling circuit, first electric current sampling circuit: the power parameter information is used for converting the current of the external power supply into rated secondary current lower than 1A and outputting the power parameter information through the rated secondary current lower than 1A; wherein,,
the first current sampling loop includes a milliamp level current transformer.
Further: still include in the electric power instrument body:
transmission switching device: the first current sampling loop or the second current sampling loop is started;
a second current sampling loop: the method comprises the steps of converting the current of an external power supply into rated secondary current of 1A or 5A, and determining second power parameter information; wherein,,
the second current sampling loop comprises a rated current transformer;
an electric power output device: and the parameter error judging module is used for judging the parameter errors of the first power parameter and the second power parameter, and outputting the first power parameter information when the parameter errors are within a preset threshold value.
Further: the power meter further includes:
the clock timer is used for determining a plurality of detection time periods of preset inspection of the electric power instrument by continuously reading the time of the electric power instrument, and generating a plurality of electric power information maps; wherein,,
the detection time period is as follows: the initial time and the final time;
the current detector is used for calculating fluctuation calculation through a dichotomy in the initial time to the final time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
transmission switching device: the filtering circuit is used for starting the transmission switching device when an abnormal fluctuation value exists, and filtering the current of the external power supply; wherein,,
the transmission switching device comprises a first current path and a second current path; wherein,,
the first current path is provided with a filter circuit.
Further: the current detector includes: the device comprises a processor, an AD sampler and a sampling resistor; wherein,,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
interval setting unit: the sampling device is used for acquiring the number of different sampling resistance values and the initial sampling value range which can be sampled by the AD sampler, and dividing the initial sampling value range into target sampling intervals corresponding to the different sampling resistance values;
a first sampling unit: the sampling value-current value relation list is used for constructing sampling value-current value relation lists between the calibration rated current parameters and sampling standard values of all the intervals based on the corresponding relation between the calibration rated current parameters and all the target sampling intervals; wherein,,
the sampling standard value is the median value of the target sampling interval;
a second sampling unit: the AD sampling value is used for acquiring the AD sampling value at the sampling resistor of the transmission switching device;
interval inquiry unit: the method comprises the steps of searching a sampling interval to which the AD sampling value belongs in a preset sampling value-current value relation list;
a current determination unit: and the method is used for determining rated current of the external power supply according to a preset sampling value-current value relation list and the sampling interval.
Further: the clock timer includes:
the signal acquisition module: the power supply device is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
and a discrete filtering module: the power generation device is used for performing discrete filtering processing on the power data to obtain stable power stability data;
and a linear correction module: the method comprises the steps of performing data linear correction processing on the electric energy stable data to obtain electric energy specific data;
and a frequency spectrum module: and the power information map is generated according to the specific data of the electric energy, and the electric energy spectrum comprises a voltage spectrum and a current spectrum.
Further: the power meter further includes:
remote communication device: for transmitting the first and second power information to a remote user terminal;
environmental monitoring device: the system comprises a plurality of sensing modules, a sensing module and a data processing module, wherein the sensing modules are used for acquiring sensing data through the plurality of sensing modules; wherein,,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data storage: for storing the first power information and the second power information;
range adjusting device: the power detection range is used for adjusting the power detection range according to the voltage of the external power supply;
abnormality alarm device: and the system is used for carrying out abnormality alarm when the power information is abnormal.
Further: the remote communication device includes:
the data receiving module is used for receiving the query request data of the user terminal, and the user terminal is provided with a fixed port and an address;
the port determining module is used for determining an access path associated with the request data from the client through the fixed port and the address, and determining a corresponding communication port according to the access path;
the service determining module is used for determining the query service of the user terminal according to the corresponding relation between the communication port and the remote desktop client webpage service; wherein,,
the inquiry service of the user terminal comprises the following steps: remote desktop application of webpage version, APP query function and remote service center;
and the sending module is used for sending the query request data to the query service of the user terminal.
Further: the environment monitoring device includes:
temperature sensor: the system comprises a power meter, a temperature sensor and a temperature sensor, wherein the power meter is used for monitoring the internal temperature and the ambient temperature of the power meter to generate temperature data;
air pressure sensor: the air pressure monitoring device is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
humidity sensor: the humidity monitoring device is used for monitoring the humidity of the electric power instrument and acquiring the environmental humidity data of the electric power instrument.
Further: the data storage includes:
a plurality of data storage units for storing the first power information and the second power information according to the detection period, and generating a plurality of data blocks;
and a coding module: for storing the plurality of data blocks into corresponding code groups, respectively; wherein,,
the coding set includes: a first encoding matrix and a second encoding matrix;
the coding groups code the data blocks in all the coding groups through a first coding matrix to obtain global check blocks corresponding to all the coding groups, and code the data blocks in each coding group through a second coding matrix to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the global check block is used for storing the global check block to a preset position and storing the sub check blocks into corresponding coding groups.
Further: the range adjusting device comprises the following range adjusting steps:
collecting input voltage data of an external power supply within a time period, and generating a voltage curve;
determining a voltage interval corresponding to the voltage input data according to the voltage curve;
determining a corresponding target range according to the voltage interval;
and acquiring the real-time range of the electric power instrument, and replacing the real-time range with the target range.
Further: the abnormality warning apparatus includes:
communication connection unit: the thread construction unit is used for accessing an online alarm system according to the remote communication device: the method comprises the steps of determining the meter position of the electric power meter, and creating an online conversation thread according to the meter position;
and an alarm unit: and the real-time abnormal alarm is carried out according to the online session thread.
An alarm guiding unit: the system is used for inputting alarm guiding information to the online alarm system in real time according to the abnormal alarm; wherein,,
the alarm guiding information comprises: power anomaly data, power anomaly regions, and power anomaly magnitudes.
The invention has the beneficial effects that: according to the invention, when power measurement is carried out, the power data can be converted into the current lower than 1A, so that the power measurement of the circuit is realized, the measurement result is more accurate, and further, the energy is saved when the power is detected.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of an electrical meter rated for secondary current less than 1A according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a handover in an embodiment of the present invention;
fig. 3 is a schematic diagram of rated secondary current below 1A in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
An electrical power meter rated for a secondary current below 1A, comprising:
an electric power meter body; wherein,,
the electric power meter comprises an electric power meter body, wherein a first current sampling loop is arranged in the electric power meter body and is used for converting the current of an external power supply into rated secondary current lower than 1A and outputting electric power parameter information through the rated secondary current lower than 1A; wherein,,
the first current sampling loop includes a milliamp level current transformer.
The principle of the technical scheme is as follows: when the electric power meter is installed on an external power supply to detect electric power, the first current sampling loop is used for collecting the current of the external power supply, and the current of the external power supply is certainly larger than 1A, because the current lower than 1A cannot supply power to any equipment, more accurate current measurement can be realized after the current is lower than 1A, and more energy can be saved during electric power measurement.
The beneficial effects of the technical scheme are that: according to the invention, when power measurement is carried out, the power data can be converted into the current lower than 1A, so that the power measurement of the circuit is realized, the measurement result is more accurate, and further, the energy is saved when the power is detected.
Further: still include in the electric power instrument body:
transmission switching device: the first current sampling loop or the second current sampling loop is started;
a second current sampling loop: the method comprises the steps of converting the current of an external power supply into rated secondary current of 1A or 5A, and determining second power parameter information; wherein,,
the second current sampling loop comprises a rated current transformer;
an electric power output device: and the parameter error judging module is used for judging the parameter errors of the first power parameter and the second power parameter, and outputting the first power parameter information when the parameter errors are within a preset threshold value.
The principle of the technical scheme is as follows: the invention relates to a power instrument with two current sampling loops, which can automatically switch a first current sampling loop and a second current sampling loop, wherein the first current sampling loop converts current into secondary current lower than 1A for detection in the process of loop switching. However, if only the secondary current of one sampling loop is used for power detection, errors may exist, so that the invention compares the detection data of the two loops to determine the comparison errors; because both are necessarily error-proof, but as long as the error is within a preset threshold, it indicates that the power parameter information detected by the first current sampling loop meets the detection criteria, and as long as the error is within the preset threshold, it indicates that the detection result is error-free, because the detection result below 1A is necessarily more correct than the detection result above 1A.
The beneficial effects of the technical scheme are that: the invention can realize accurate detection of circuit parameters, can also verify the accuracy of the detection data of the first circuit sampling loop, and judges whether the detection result meets the detection standard.
Further: the power meter further includes:
the clock timer is used for determining a plurality of detection time periods of preset inspection of the electric power instrument by continuously reading the time of the electric power instrument, and generating a plurality of electric power information maps; wherein,,
the detection time period is as follows: the initial time and the final time;
the current detector is used for calculating fluctuation calculation through a dichotomy in the initial time to the final time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
transmission switching device: the filtering circuit is used for starting the transmission switching device when an abnormal fluctuation value exists, and filtering the current of the external power supply; wherein,,
the transmission switching device comprises a first current path and a second current path; wherein,,
the first current path is provided with a filter circuit.
The principle of the technical scheme is as follows:
in order to rapidly judge the abnormality generated in the detection circuit through the electric power instrument and realize more accurate circuit detection, the invention is provided with a clock timer which is started to generate a plurality of electric power information maps, and the electric power information maps are calculated in a dichotomy, so that whether electric power fluctuation exists or not is judged through the plurality of electric power information maps, and the time from the initial moment to the final moment is always not lower than 1S. The power information maps can accord with the calculation rule of the dichotomy, the power fluctuation can be found more conveniently, the comparison is realized, one of the two transmission paths is provided with the filter circuit, and the other transmission path is not provided with the filter circuit, so that the loss proportion and the loss intensity of the power transmission caused by the interference and the loss in the circuit can be judged when the circuit is transmitted, thereby the transmission voltage of the current path is reduced, and the loss is reduced.
The beneficial effects of the technical scheme are that:
the invention can carry out the comparison calculation of the filtered current and the unfiltered current in the process of circuit transmission, and determine the loss intensity of the circuit, thereby adjusting the voltage and reducing the loss, and can also determine the power fluctuation and the power abnormality through the dichotomy calculation of the power information map.
Further: the current detector includes: the device comprises a processor, an AD sampler and a sampling resistor; wherein,,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
interval setting unit: the sampling device is used for acquiring the number of different sampling resistance values and the initial sampling value range which can be sampled by the AD sampler, and dividing the initial sampling value range into target sampling intervals corresponding to the different sampling resistance values;
a first sampling unit: the sampling value-current value relation list is used for constructing sampling value-current value relation lists between the calibration rated current parameters and sampling standard values of all the intervals based on the corresponding relation between the calibration rated current parameters and all the target sampling intervals; wherein,,
the sampling standard value is the median value of the target sampling interval;
a second sampling unit: the AD sampling value is used for acquiring the AD sampling value at the sampling resistor of the transmission switching device;
interval inquiry unit: the method comprises the steps of searching a sampling interval to which the AD sampling value belongs in a preset sampling value-current value relation list;
a current determination unit: and the method is used for determining rated current of the external power supply according to a preset sampling value-current value relation list and the sampling interval.
The principle of the technical scheme is as follows: the invention can detect the input current and voltage through the AD sampler and the sampling resistor, the processor can determine the sampling range by sampling through different sampling resistor values and AK, the sampling resistor is a sensitive resistor with the resistance value changing when current passes, and the accurate sampling of the current and the voltage can be realized through the difference of the resistance values. In the invention, because there are two loops, the number of sampling resistors is also two, and thus double current detection can be realized, the interval setting unit is also a set double interval, namely a current of 1A or 5A or a current lower than 1A, the purpose of dividing the sampling range is to determine the current of the corresponding sampling resistor according to the value of the collected rated current, thereby constructing a relation list of sampling and current values, and realizing current detection, but in the prior art, the current detection has an error necessarily, and the prior art only collects one bit behind an integer bit or directly collects an integer bit, but the current of the invention is lower than 1A, so that a target sampling interval needs to be set, and a standard value is determined through a median value. And then determining the rated current value of the corresponding external power supply or equipment through the sampling value-current value relation list after sampling the corresponding sampling value.
The beneficial effects of the technical scheme are that: the invention can accurately sample the external current, determine the sampling interval, realize the accurate sampling of the external power supply equipment and determine the rated current of the external power supply.
Further: the clock timer includes:
the signal acquisition module: the power supply device is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
and a discrete filtering module: the power generation device is used for performing discrete filtering processing on the power data to obtain stable power stability data;
and a linear correction module: the method comprises the steps of performing data linear correction processing on the electric energy stable data to obtain electric energy specific data;
and a frequency spectrum module: and the power information map is generated according to the specific data of the electric energy, and the electric energy spectrum comprises a voltage spectrum and a current spectrum.
The principle of the technical scheme is as follows: the clock timer is an integrated timer, the voltage signal is the input voltage of an external power supply, the electric energy signal is the electric power fluctuation signal of the external power supply, and the discrete filtering processing of the electric energy data is to reject the discrete data, so that a discrete point of a stable curve can be formed when the external power supply is determined to supply power, namely, at different times, the electric energy data is stable and cannot exceed a detection threshold value, and the discrete point exceeds the detection threshold value, namely, an invalid or wrong point caused by interference is represented, so that the electric energy stable data is determined. The electric energy stabilization data are used as power supply data of an external power supply, the input voltage of the external power supply is corrected, specific electric energy data in a detection time period are determined, discrete filtering processing is carried out, and the removed data are points exceeding detection limit due to interference factors. The remaining discrete points are the input elegant overall data of the correct external power source, thereby generating a power information map.
The beneficial effects of the technical scheme are that: the electric power instrument can reject error data in detection in the detection process based on the clock timer, so that accurate detection is realized.
Further: the power meter further includes:
remote communication device: for transmitting the first and second power information to a remote user terminal;
environmental monitoring device: the system comprises a plurality of sensing modules, a sensing module and a data processing module, wherein the sensing modules are used for acquiring sensing data through the plurality of sensing modules; wherein,,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data storage: for storing the first power information and the second power information;
range adjusting device: the power detection range is used for adjusting the power detection range according to the voltage of the external power supply;
abnormality alarm device: and the system is used for carrying out abnormality alarm when the power information is abnormal.
The principle of the technical scheme is as follows: the electric power instrument can realize remote monitoring, does not need to be directly observed on the electric power instrument, can monitor at fixed points and can receive monitoring data remotely. The invention can also detect the environment during the electric power detection, determine the influence of the environment state on the measurement accuracy, and realize the adjustment of the detection range of the electric power instrument according to the detection range required by the external power supply, and also can define the range according to the measurement result when the measurement result appears, thereby displaying the specific measurement result more clearly. And when the power abnormality occurs, the power abnormality is accurately analyzed.
The beneficial effects of the technical scheme are that: the invention can remotely receive the power detection information when the power detection is performed. The method can also adjust the accuracy of the detection result according to the environmental data around the detection power instrument, store the detection information, adjust the detection range, display the detection result more clearly and alarm the abnormal phenomenon in the detection.
Further: the remote communication device includes:
the data receiving module is used for receiving the query request data of the user terminal, and the user terminal is provided with a fixed port and an address;
the port determining module is used for determining an access path associated with the request data from the client through the fixed port and the address, and determining a corresponding communication port according to the access path;
the service determining module is used for determining the query service of the user terminal according to the corresponding relation between the communication port and the remote desktop client webpage service; wherein,,
the inquiry service of the user terminal comprises the following steps: remote desktop application of webpage version, APP query function and remote service center;
and the sending module is used for sending the query request data to the query service of the user terminal.
The principle of the technical scheme is as follows: the remote communication device can receive the data query information of the user terminal, determine the power data to be queried, and remotely set the detection range of the power data. The user terminal has fixed ports and addresses, and the fixed ports are used for realizing the authorization of the user terminal, and each user terminal has only one data transmission port and fixed address. The port determining module can determine a fixed port and an address for stopping vomiting at the user terminal, determine an access path of data accessed by the user terminal, and determine a corresponding communication port through the access path, wherein the access path is an access path corresponding to query service for positioning a query function when the user terminal accesses, and each query service corresponds to the query device, so that the query authority of a corresponding query user can be determined, the query data request is determined, and the corresponding query data is uploaded.
The beneficial effects of the technical scheme are that: firstly, the invention can realize remote data inquiry, each authorized inquiry terminal has a unique port and address, realizes quick user terminal identity positioning, can determine corresponding access service according to an access path, and is convenient for quick inquiry information uploading.
Further: the environment monitoring device includes:
temperature sensor: the system comprises a power meter, a temperature sensor and a temperature sensor, wherein the power meter is used for monitoring the internal temperature and the ambient temperature of the power meter to generate temperature data;
air pressure sensor: the air pressure monitoring device is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
humidity sensor: the humidity monitoring device is used for monitoring the humidity of the electric power instrument and acquiring the environmental humidity data of the electric power instrument.
The principle of the technical scheme is as follows: the invention can detect the temperature inside the instrument and the external environment, detect the air pressure and moderately detect the air pressure, thereby determining the influence of the environmental factors on the detection result of the electric power instrument and further adjusting the result.
The beneficial effects of the technical scheme are that: the invention can adjust the detection result according to the environmental factors, thereby ensuring the accuracy of the detection data of the electric power instrument.
Further: the data storage includes:
a plurality of data storage units for storing the first power information and the second power information according to the detection period, and generating a plurality of data blocks;
and a coding module: for storing the plurality of data blocks into corresponding code groups, respectively; wherein,,
the coding set includes: a first encoding matrix and a second encoding matrix;
the coding groups code the data blocks in all the coding groups through a first coding matrix to obtain global check blocks corresponding to all the coding groups, and code the data blocks in each coding group through a second coding matrix to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the global check block is used for storing the global check block to a preset position and storing the sub check blocks into corresponding coding groups.
The principle of the technical scheme is as follows: the invention can store the power data according to the detection time periods, each time period generates a data block, in order to compress the stored data and reduce the storage amount, the invention encodes according to the encoding group to generate the encoding matrix, and the detection data of the power instrument can be directly stored by encoding after the encoding matrix. In order to realize quick and accurate data verification when data are verified, the global verification block is the total verification code of the code group, and the second coding matrix codes the verification code of each data block in the code group, so that accurate coding can be realized, and then each data block is verified through coding.
The beneficial effects of the technical scheme are that: the invention can compress and store the power information through the coding of the data block, and reduce the data storage requirement capacity. Secondly, the invention can also determine the rapid positioning of the data block based on the coding matrix, thereby performing data verification.
Further: the range adjusting device comprises the following range adjusting steps:
collecting input voltage data of an external power supply within a time period, and generating a voltage curve;
determining a voltage interval corresponding to the voltage input data according to the voltage curve;
determining a corresponding target range according to the voltage interval;
and acquiring the real-time range of the electric power instrument, and replacing the real-time range with the target range.
The principle of the technical scheme is as follows:
when the existing power meter detects data, the measurement of the power data can only be performed based on a set original measuring range, so that the power data cannot be measured with high accuracy when interference exists in the power data. The invention can automatically divide the measuring range through the voltage interval based on the detected power data, thereby achieving more accurate measurement.
The beneficial effects of the technical scheme are that:
according to the invention, when external power supply detection is performed, a corresponding voltage data curve is generated according to the voltage data, and after the voltage curve is determined, the voltage interval of the voltage data, namely the voltage interval of the voltage data detected in real time, can be determined. And then determining a target range, and determining a power detection result through the target range.
Further: the abnormality warning apparatus includes:
communication connection unit: the thread construction unit is used for accessing an online alarm system according to the remote communication device: the method comprises the steps of determining the meter position of the electric power meter, and creating an online conversation thread according to the meter position;
and an alarm unit: and the real-time abnormal alarm is carried out according to the online session thread.
An alarm guiding unit: the system is used for inputting alarm guiding information to the online alarm system in real time according to the abnormal alarm; wherein,,
the alarm guiding information comprises: power anomaly data, power anomaly regions, and power anomaly magnitudes.
The principle of the technical scheme is as follows: when the invention carries out abnormal alarm, the alarm system accessed by the communication connection unit can carry out rapid alarm. The method can also be used for establishing an online conversation thread according to the real-time position of the electric power instrument, the conversation thread is independently established through the online conversation thread, one-to-one communication is realized, so that rapid alarm is realized, real-time abnormal alarm is realized, and accurate electric power alarm is performed through comprehensive electric power abnormal guide information when the real-time alarm is performed.
The beneficial effects of the technical scheme are that: the invention can carry out rapid electric power alarm when the electric power is abnormal, and realize accurate alarm information guidance based on the electric power guidance information, thereby realizing alarm.
In an alternative embodiment, the abnormality warning device of the present invention performs power warning, and further includes the steps of:
step A1: acquiring a data block of power data acquired by a power instrument, performing Fourier transformation on the data block of the power data, and constructing a discretized power data model;
wherein D (U (T, D), V (T, K)) represents the power data model, U (T, D) i ) Representing the detected power data value at time t; t represents the moment; d, d i A power data value representing an i-th data block; i εn, n represents the total number of data blocks of the power data;
v (T, K) represents the power abnormality data value in the detection period T; total detection time of the T power meter; k represents an electric power abnormality data value of the detection period; j represents a dirigible condition; f (t, K) represents a data function of the power anomaly;
in the step A1, a data model of the power data is constructed, and the state of the power data model is represented in the form of an exponential function in the state where the power abnormality exists, so that the power abnormality data in the power data can be accurately identified. In this process, in order for the present invention to be based on the data characteristic function built for each data block, therefore, data processing is performed by the data block, and then the data information of the power abnormality is determined by the power abnormality data value, the power abnormality data K being an abnormality value of the power data occurring in the data block of the power data, and when there is no abnormality value, the abnormality value of the power data is 0. And then a model of the whole power data is built based on the form of an exponential function.
Step A2: the power data model is input into the alarm guiding model through the alarm guiding unit, and the information characteristics of the alarm guiding information are determined:
wherein delta (K) represents information characteristics of the alarm guiding information, K is p An abnormal dynamic parameter within a norm p of a power abnormality data value representing a detection period, γ representing a power abnormality intensity, ω representing a magnitude of the power abnormality。
In step A2, since the abnormal amplitude of the power abnormal data is mainly determined in the power data, the power data at each time is processed, and an alarm guidance model is constructed, so that the alarm processing of the power abnormal data is performed. The power guiding model is mainly used for determining the intensity and the danger level of the power abnormality, so the invention introduces the amplitude omega of the power abnormality, wherein omega represents the ratio of real-time power data and an abnormality threshold power reference limit value at each moment.
Step A3: and acquiring the codes of the data blocks of the abnormal power data, determining the power abnormal region through the codes, and outputting the power abnormal region serving as the alarm guiding information through the information characteristics of the alarm guiding information.
In step A3, the region of the corresponding power abnormality is determined by encoding the abnormality of the power data, and then the data intensity corresponding to the power abnormality and the amplitude of the power abnormality are output as data characteristics.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An electrical power meter rated for a secondary current of less than 1A, comprising:
an electric power meter body; wherein,,
a first current sampling loop is arranged in the electric power instrument body and is used for converting the current of an external power supply into rated secondary current lower than 1A and outputting a first electric power parameter through the rated secondary current lower than 1A; wherein,,
the first current sampling loop comprises a milliamp-level current transformer;
still include in the electric power instrument body:
transmission switching device: the first current sampling loop or the second current sampling loop is started;
a second current sampling loop: the method comprises the steps of converting the current of an external power supply into rated secondary current of 1A or 5A, and determining second power parameter information; wherein,,
the second current sampling loop comprises a rated current transformer;
an electric power output device: the parameter error judging module is used for judging the parameter errors of the first power parameter and the second power parameter, and outputting the first power parameter information when the parameter errors are within a preset threshold value;
the power meter further includes:
the clock timer is used for determining a plurality of detection time periods of preset inspection of the electric power instrument by continuously reading the time of the electric power instrument, and generating a plurality of electric power information maps; wherein,,
the detection time period is as follows: the initial time and the final time;
the current detector is used for calculating fluctuation calculation through a dichotomy in the initial time to the final time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
transmission switching device: the filtering circuit is used for starting the transmission switching device when an abnormal fluctuation value exists, and filtering the current of the external power supply; wherein,,
the transmission switching device comprises a first current path and a second current path; wherein,,
the first current path is provided with a filter circuit;
the electric power instrument can perform comparison calculation of the filtered current and the unfiltered current in the process of circuit transmission, and determine the loss intensity of the circuit, so that the voltage is regulated, and the loss is reduced;
the current detector includes: the device comprises a processor, an AD sampler and a sampling resistor; wherein,,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
interval setting unit: the sampling device is used for acquiring the number of different sampling resistance values and the initial sampling value range which can be sampled by the AD sampler, and dividing the initial sampling value range into target sampling intervals corresponding to the different sampling resistance values;
a first sampling unit: the method comprises the steps of constructing a sampling value-current value relation list between a calibration rated current parameter and each interval sampling standard value based on the corresponding relation between the calibration rated current parameter and each target sampling interval; wherein,,
the sampling standard value is the median value of the target sampling interval;
a second sampling unit: the AD sampling value is used for acquiring the AD sampling value at the sampling resistor of the transmission switching device;
interval inquiry unit: the method comprises the steps of searching a sampling interval to which the AD sampling value belongs in a preset sampling value-current value relation list;
a current determination unit: and the method is used for determining rated current of the external power supply according to a preset sampling value-current value relation list and the sampling interval.
2. An electrical power meter rated for a secondary current less than 1A as recited in claim 1, wherein said clock timer comprises:
the signal acquisition module: the power supply device is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
and a discrete filtering module: the power generation device is used for performing discrete filtering processing on the power data to obtain stable power stability data;
and a linear correction module: the method comprises the steps of performing data linear correction processing on the electric energy stable data to obtain electric energy specific data;
and a frequency spectrum module: and the power information map is used for generating a power information map according to the specific data of the electric energy, and the power information map comprises a voltage spectrum and a current spectrum.
3. An electrical power meter rated for a secondary current less than 1A as recited in claim 1, wherein said electrical power meter further comprises:
remote communication device: for transmitting the first and second power information to a remote user terminal;
environmental monitoring device: the system comprises a plurality of sensing modules, a sensing module and a data processing module, wherein the sensing modules are used for acquiring sensing data through the plurality of sensing modules; wherein,,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data storage: for storing the first power information and the second power information;
range adjusting device: the power detection range is adjusted according to the voltage of an external power supply;
abnormality alarm device: and the system is used for carrying out abnormality alarm when the power information is abnormal.
4. A power meter rated for secondary current less than 1A as recited in claim 3, wherein said remote communication means comprises:
the data receiving module is used for receiving the query request data of the user terminal, and the user terminal is provided with a fixed port and an address;
the port determining module is used for determining an access path associated with the query request data from the client through the fixed port and the address, and determining a corresponding communication port according to the access path;
the service determining module is used for determining the query service of the user terminal according to the corresponding relation between the communication port and the remote desktop client webpage service; wherein,,
the inquiry service of the user terminal comprises the following steps: remote desktop application of webpage version, APP query function and remote service center;
and the sending module is used for sending the query request data to the query service of the user terminal.
5. A power meter rated for secondary current less than 1A as recited in claim 3, wherein said environmental monitoring means comprises:
temperature sensor: the system comprises a power meter, a temperature sensor and a temperature sensor, wherein the power meter is used for monitoring the internal temperature and the ambient temperature of the power meter to generate temperature data;
air pressure sensor: the air pressure monitoring device is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
humidity sensor: the humidity monitoring device is used for monitoring the humidity of the electric power instrument and acquiring the environmental humidity data of the electric power instrument.
6. A power meter rated for secondary current less than 1A as recited in claim 3, wherein said data storage comprises:
a plurality of data storage units for storing the first power information and the second power information according to the detection period, and generating a plurality of data blocks;
and a coding module: for storing the plurality of data blocks into corresponding code groups, respectively; wherein,,
the coding set includes: a first encoding matrix and a second encoding matrix;
the coding groups code the data blocks in all the coding groups through a first coding matrix to obtain global check blocks corresponding to all the coding groups, and code the data blocks in each coding group through a second coding matrix to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the global check block is used for storing the global check block to a preset position and storing the sub check blocks into corresponding coding groups.
7. A power meter rated for secondary current less than 1A as claimed in claim 3, wherein said range adjustment means comprises the range adjustment steps of:
collecting input voltage data of an external power supply within a time period, and generating a voltage curve;
determining a voltage interval corresponding to the voltage input data according to the voltage curve;
determining a corresponding target range according to the voltage interval;
and acquiring the real-time range of the electric power instrument, and replacing the real-time range with the target range.
8. A power meter rated for secondary current less than 1A as recited in claim 3, wherein said abnormality warning means comprises:
communication connection unit: the remote communication device is used for accessing an online alarm system according to the remote communication device;
a thread construction unit: the method comprises the steps of determining the meter position of the electric power meter, and creating an online conversation thread according to the meter position;
and an alarm unit: the real-time abnormal alarm is carried out according to the online conversation thread;
an alarm guiding unit: the system is used for inputting alarm guiding information to the online alarm system in real time according to the abnormal alarm; wherein,,
the alarm guiding information comprises: power anomaly data, power anomaly regions, and power anomaly magnitudes.
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| CN101726652B (en) * | 2009-11-26 | 2011-10-19 | 深圳市双合电脑系统股份有限公司 | Method for sampling secondary loop in power system with optimized measurement accuracy |
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