CN115639392A - Electric power instrument with rated secondary current lower than 1A - Google Patents
Electric power instrument with rated secondary current lower than 1A Download PDFInfo
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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, this internal first current sampling return circuit that is provided with of electric power instrument, first current sampling return circuit: the power supply is used for converting the current of the external power supply into rated secondary current lower than 1A and outputting power parameter information through the rated secondary current lower than 1A; the first current sampling loop comprises a milliampere current transformer. The invention directly converts the electric power meter 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 the product, and simultaneously can ensure that the electric power meter realizes better measuring, metering and protecting effects.
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 meter, and the power supply equipment is applied to various power equipment or power grids, and the power meter has many functions, for example, signal acquisition of a power supply can be performed, a primary current is reflected in real time and measured, circuit protection and alarm are performed, a large current is converted into a small current, in the process, a primary large current is converted into a rated secondary small current of 1A or 5A, and in order to convert the primary large current into the small current below 1A, the rated secondary small current of 1A or 5A needs to be converted secondarily, and the small current below 1A can be obtained.
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 disclosed in patent CN202210160119.K, the novel transformer is provided, but the transformer only has the function of protection current, the existing power instrument cannot detect power under the condition that the rated current is lower than 1A, and the accuracy of power detection 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 problem that in a current transformer with rated secondary current lower than 1A in patent CN202210160119.K, only the novel transformer is provided, but the transformer only has the function of protective current and cannot realize the acquisition of circuit information.
An electric power meter rated for a secondary current lower than 1A, comprising:
an electric power meter body; wherein the content of the first and second substances,
this internal first current sampling circuit that is provided with of electric power instrument, first current sampling circuit: the power supply control circuit is used for converting the current of the external power supply into rated secondary current lower than 1A and outputting power parameter information through the rated secondary current lower than 1A; wherein the content of the first and second substances,
the first current sampling loop comprises a milliampere current transformer.
And further: still include in the electric power instrument body:
a transmission switching device: the first current sampling loop or the second current sampling loop is used for being externally connected with an external power supply and starting;
a second current sampling loop: the second power parameter information is determined by converting the current of the external power supply into a rated secondary current of 1A or 5A; wherein the content of the first and second substances,
the second current sampling loop comprises a rated current transformer;
an electric power output device: and the first power parameter information 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 electric power meter further includes:
the clock timer is used for determining that a plurality of power information maps are generated in a plurality of detection time periods of the preset routing inspection of the power instrument by continuously reading the time of the power instrument; wherein the content of the first and second substances,
the detection time period is as follows: the initial time to the end time;
the current detector is used for calculating fluctuation calculation through dichotomy from the initial time to the termination time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
a transmission switching device: the filter 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 content of the first and second substances,
the transmission switching device comprises a first current path and a second current path; wherein the content of the first and second substances,
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 content of the first and second substances,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
a section setting unit: the AD sampler is used for acquiring the number of different sampling resistance values and the range of initial sampling values which can be sampled by the AD sampler, and dividing the range of the initial sampling values into target sampling intervals corresponding to the different sampling resistance values;
a first sampling unit: the sampling value-current value relation list is constructed between the calibrated rated current parameter and the sampling standard value of each interval based on the corresponding relation between the calibrated rated current parameter and each target sampling interval; wherein, the first and the second end of the pipe are connected with each other,
the sampling standard value is a median value of the target sampling interval;
a second sampling unit: the AD sampling value at the sampling resistor of the transmission switching device is obtained;
an interval query unit: the device is used for 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 system is used for determining the 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 system comprises a power supply, a data acquisition module and a data processing module, wherein the power supply is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
a discrete filtering module: the discrete filtering processing module is used for performing discrete filtering processing on the electric energy data to obtain stable electric energy stable data;
a linear rectification module: the electric energy stabilizing data processing device is used for carrying out data linear correction processing on the electric energy stabilizing data to obtain electric energy specific data;
a spectrum module: and the electric energy spectrum comprises a voltage spectrum and a current spectrum.
Further: the electric power meter further includes:
the remote communication device: transmitting the first and second power information to a remote user terminal;
the environment monitoring device comprises: the system comprises a plurality of sensing modules, a data acquisition module and a data processing module, wherein the sensing modules are used for acquiring sensing data; wherein the content of the first and second substances,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data memory: for storing the first and second power information;
range adjusting device: the power detection range is adjusted according to the voltage of the external power supply;
an abnormality warning device: and the method is used for alarming the abnormity when the power information is abnormal.
Further: the remote communication apparatus includes:
the data receiving module is used for receiving query request data of a 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 related to 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 first and the second end of the pipe are connected with each other,
the query service of the user terminal includes: the system comprises a remote desktop application of a webpage version, an APP query function and a 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:
a temperature sensor: the temperature monitoring device is used for monitoring the internal temperature and the ambient temperature of the power meter and generating temperature data;
an air pressure sensor: the system is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
a humidity sensor: and the humidity monitoring module 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;
the coding module: the encoding device is used for respectively storing a plurality of data blocks into corresponding encoding groups; wherein, the first and the second end of the pipe are connected with each other,
the encoding set includes: a first encoding matrix and a second encoding matrix;
the coding group encodes the data blocks in all the coding groups through the first coding matrix to obtain global check blocks corresponding to all the coding groups, and encodes the data blocks in each coding group through the second coding matrix to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the system is used for storing the global check block to a preset position and storing the sub check blocks to the 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 to generate a voltage curve;
determining a voltage interval corresponding to the voltage data according to the voltage curve;
determining a corresponding target measuring 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 device includes:
a communication connection unit: the thread building unit is used for accessing the on-line alarm system according to the remote communication device and comprises: the system comprises a processor, a conversation thread and a communication module, wherein the processor is used for determining the meter position of an electric power meter and creating an online conversation thread according to the meter position;
an alarm unit: and the real-time exception alarm is carried out according to the online conversation thread.
An alarm guide unit: the alarm system is used for inputting alarm guide information to the online alarm system in real time according to the abnormal alarm; wherein the content of the first and second substances,
the alarm guidance information includes: power anomaly data, power anomaly region, and power anomaly magnitude.
The invention has the beneficial effects that: the invention can convert the power data into the current lower than 1A when the power is measured, thereby realizing the power measurement of the circuit, and the measurement result is more accurate, thereby saving more energy 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 will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an electrical power meter with a rated secondary current of less than 1A according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a handover in an embodiment of the present invention;
fig. 3 is a schematic diagram of an embodiment of the invention with a rated secondary current below 1A.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
An electric power meter rated for a secondary current below 1A, comprising:
an electric power meter body; wherein the content of the first and second substances,
the electric power meter is characterized in that a first current sampling loop is arranged in the electric power meter body and 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 content of the first and second substances,
the first current sampling loop comprises a milliampere current transformer.
The principle of the technical scheme is as follows: when the power meter is installed on an external power supply to detect power, the current of the external power supply is collected through the first current sampling loop, the current of the external power supply is certainly larger than 1A, because the current lower than 1A cannot supply power to any equipment, but after the current is lower than 1A, more accurate current measurement can be realized, and more energy can be saved during power measurement.
The beneficial effects of the above technical scheme are that: the invention can convert the power data into the current lower than 1A when the power is measured, thereby realizing the power measurement of the circuit, and the measurement result is more accurate, thereby saving more energy when the power is detected.
Further: still include in the electric power instrument body:
a transmission switching device: the first current sampling loop or the second current sampling loop is used for being externally connected with an external power supply and starting;
a second current sampling loop: the second power parameter information is determined by converting the current of the external power supply into a rated secondary current of 1A or 5A; wherein, the first and the second end of the pipe are connected with each other,
the second current sampling loop comprises a rated current transformer;
an electric power output device: and the device 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 an electric power instrument with two current sampling loops, which can automatically switch a first current sampling loop and a second current sampling loop, wherein in the process of switching the loops, the first current sampling loop converts current into secondary current lower than 1A for detection. However, if the electric power detection is carried out only through the secondary current of one sampling loop, errors may exist, so the method determines the comparison error through comparing the detection data of the two loops; since the two are necessarily in error, but as long as the error is within the preset threshold, it indicates that the power parameter information detected by the first current sampling loop meets the detection standard, and as long as the detection result below 1A is necessarily more correct than the detection result above 1A, it indicates that the detection result is error-free as long as the threshold is met.
The beneficial effects of the above technical scheme are that: the invention can realize the accurate detection of the circuit parameters, can also carry out the accuracy verification on the detection data of the first circuit sampling loop and judge whether the detection result meets the detection standard or not.
Further: the electric power meter further includes:
the clock timer is used for determining that a plurality of power information maps are generated in a plurality of detection time periods of the preset routing inspection of the power instrument by continuously reading the time of the power instrument; wherein the content of the first and second substances,
the detection time period is as follows: the initial time to the termination time;
the current detector is used for calculating fluctuation calculation through dichotomy from the initial time to the termination time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
a transmission switching device: the filter 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 first and the second end of the pipe are connected with each other,
the transmission switching device comprises a first current path and a second current path; wherein, the first and the second end of the pipe are connected with each other,
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 power meter and realize more accurate circuit detection, the invention is provided with the clock timer which is started to generate a plurality of power information maps, and the maps are calculated by bisection method, so that whether the power fluctuation exists or not is judged through the plurality of circuit information maps, and the time from the initial time to the termination time is not less than 1S. A plurality of electric power information atlases can accord with the calculation rule of dichotomy, also make things convenient for more to discover electric power fluctuation, realize the contrast, in two transmission paths, one sets up filter circuit, and one does not set up filter circuit, also can judge when carrying out circuit transmission, and interference and loss in the circuit can be to power transmission's loss proportion and loss intensity that causes to the transmission voltage in electric current route reduces the loss.
The beneficial effects of the above technical scheme are that:
the invention can carry out the comparison calculation of the filtered current and the unfiltered current in the circuit transmission process, and determine the loss intensity of the circuit, thereby adjusting the voltage, reducing the loss, and determining 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 first and the second end of the pipe are connected with each other,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
a section setting unit: the device comprises a sampling circuit, a sampling circuit and a sampling circuit, wherein the sampling circuit is used for acquiring the number of different sampling resistance values and an initial sampling value range which can be sampled by an 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 constructed between the calibrated rated current parameter and the sampling standard value of each interval based on the corresponding relation between the calibrated rated current parameter and each target sampling interval; wherein the content of the first and second substances,
the sampling standard value is a median value of the target sampling interval;
a second sampling unit: the AD sampling value at the sampling resistor of the transmission switching device is obtained;
an interval query unit: the device is used for 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 system is used for determining the 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 through different sampling resistance values and AK sampling, the sampling resistor is a sensitive resistor which can change the resistance value when current passes through, and the accurate sampling of the current and the voltage can be realized through the difference of the resistance values. In the invention, because two loops exist, the number of the sampling resistors is also two, and further double current detection can be realized, the interval setting unit is also a set double interval, and the interval setting unit is respectively 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, so as to construct a relation list of sampling and current values and realize current detection, but the current detection has errors in the prior art, and only one bit behind an integer bit or directly collects the integer bit in the prior art, but the current of the invention is lower than 1A, so that a target sampling interval needs to be set, and the standard value is determined through a median value. And then, determining the rated current value of the corresponding external power supply or equipment after the corresponding sampling value is sampled through the sampling value-current value relation list.
The beneficial effects of the above 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 system comprises a power supply, a data acquisition module and a data processing module, wherein the power supply is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
a discrete filtering module: the discrete filtering processing module is used for performing discrete filtering processing on the electric energy data to obtain stable electric energy stable data;
a linear rectification module: the electric energy stabilizing data processing device is used for carrying out data linear correction processing on the electric energy stabilizing data to obtain electric energy specific data;
a spectrum module: the electric energy data processing device is used for generating an electric energy information map according to the electric energy specific data, 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, a voltage signal is input voltage of an external power supply, an electric energy signal is an electric power fluctuation signal of the external power supply, discrete filtering processing of electric energy data is carried out, the discrete filtering processing is carried out, in order to eliminate discrete data, when the power supply of the external power supply is determined, discrete points of a stable curve can be formed, namely, points where the electric energy data are stable at different time and cannot exceed a detection threshold value are represented, and invalid or wrong points caused by interference are represented, so that the electric energy stable data are determined. The electric energy stable data is used as power supply data of an external power supply, the input voltage of the external power supply is corrected, the electric energy specific data in the detection time period is determined, discrete filtering processing is carried out, and the rejected data are points exceeding the detection limit due to interference factors. The remaining discrete points are the correct overall elegant data input from the external power source, thereby generating a power information map.
The beneficial effects of the above technical scheme are that: the electric power meter can eliminate error data in detection in the detection process based on the clock timer, so that accurate detection is realized.
And further: the power meter further includes:
the remote communication device: for transmitting the first and second power information to a remote user terminal;
the environment monitoring device comprises: the system comprises a plurality of sensing modules, a data acquisition module and a data processing module, wherein the sensing modules are used for acquiring sensing data; wherein the content of the first and second substances,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data memory: for storing the first and second power information;
range adjusting device: the power detection range is adjusted according to the voltage of the external power supply;
an abnormality warning device: and the method is used for alarming the abnormity when the power information is abnormal.
The principle of the technical scheme is as follows: the electric power instrument can realize remote monitoring without directly observing the electric power instrument, and the electric power instrument can monitor at fixed points and remotely receive monitoring data. The invention can also detect the environment during the power detection and determine the influence of the environment state on the measurement accuracy, the range adjustment is to adjust the detection range of the power meter according to the detection range required by the external power supply, and the range can also be defined according to the measurement result when the measurement result appears, so that the specific measurement result can be displayed more clearly. And then when the power abnormity occurs, the power abnormity is accurately analyzed.
The beneficial effects of the above technical scheme are that: the invention can remotely receive the power detection information when the power detection is carried out. The detection device 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, more clearly display the detection result and give an alarm for abnormal phenomena in the detection.
Further: the remote communication apparatus includes:
the data receiving module is used for receiving query request data of a 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 related to 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 content of the first and second substances,
the query service of the user terminal includes: the system comprises a remote desktop application of a webpage version, an APP query function and a 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 of the invention 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 a fixed port and an address, the fixed port is used for realizing the authorization of the user terminal, and each user terminal only has one data transmission port and a fixed address. The port determining module can determine a fixed port and an address for preventing vomit at a user terminal, determine an access path of data accessed by the user terminal, determine a corresponding communication port through the access path, wherein the access path is an access path of a corresponding query service when the user terminal accesses and is used for positioning a query function, and each query service corresponds to the query device, so that query permission of the corresponding query user can be determined, a query data request is determined, and corresponding query data is uploaded.
The beneficial effects of the above technical scheme are that: firstly, the invention can realize remote data query, each authorized query terminal has a unique port and address, thereby realizing rapid user terminal identity positioning, determining corresponding access service according to an access path, and facilitating rapid query information uploading.
Further: the environment monitoring device includes:
a temperature sensor: the temperature monitoring device is used for monitoring the internal temperature and the ambient temperature of the power meter and generating temperature data;
an air pressure sensor: the device is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
a humidity sensor: and the humidity monitoring module 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, the external environment, the air pressure and the appropriate degree, thereby determining the influence of the environmental factors on the detection result of the power instrument and further adjusting the result.
The beneficial effects of the above 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 power meter.
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 time period and generating a plurality of data blocks;
the coding module: the device is used for respectively storing a plurality of data blocks into corresponding coding groups; wherein the content of the first and second substances,
the encoding set includes: a first encoding matrix and a second encoding matrix;
the coding groups encode the data blocks in all the coding groups through the first coding matrix to obtain global check blocks corresponding to all the coding groups, and the second coding matrix is used for respectively encoding the data blocks in each coding group to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the system is used for storing the global check block to a preset position and storing the sub check blocks to the corresponding coding groups.
The principle of the technical scheme is as follows: the method 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 data are encoded according to the encoding groups to generate an encoding matrix, and after the encoding matrix, the detection data of the power meter can be directly stored through encoding. In order to realize rapid and accurate data verification when data is verified, the global check block is the total check code of the coding group, and the second coding matrix code is the check code of each data block in the coding group, so that accurate coding can be realized, and then each data block is verified through coding.
The beneficial effects of the above technical scheme are that: the invention can compress and store the power information through the coding of the data block, thereby reducing the capacity required by data storage. Secondly, the invention can also determine the rapid positioning of the data block based on the coding matrix, thereby carrying out data verification.
And further: the range adjusting device comprises the following range adjusting steps:
collecting input voltage data of an external power supply within a time period to generate a voltage curve;
determining a voltage interval corresponding to the voltage data according to the voltage curve;
determining a corresponding target measuring range according to the voltage interval;
and acquiring the real-time measuring range of the electric power meter, and replacing the real-time measuring range with the target measuring range.
The principle of the technical scheme is as follows:
when the existing power meter detects data, the power data can be measured only based on a set original measuring range, so that when interference exists in the power data, the power data cannot be measured with high precision. The invention can automatically divide the measuring range through the voltage interval based on the detected electric power data to achieve more accurate measurement.
The beneficial effects of the above technical scheme are that:
according to the invention, when the external power supply is detected, 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 can be determined, namely the voltage interval of the voltage data detected in real time. And then determining a target range, and determining a power detection result according to the target range.
Further: the abnormality warning device includes:
a communication connection unit: the thread building unit is used for accessing the on-line alarm system according to the remote communication device and comprises: the system comprises a processor, a conversation thread and a communication module, wherein the processor is used for determining the meter position of an electric power meter and creating an online conversation thread according to the meter position;
an alarm unit: and the real-time abnormity alarm is carried out according to the online conversation thread.
An alarm guide unit: the alarm system is used for inputting alarm guide information to the online alarm system in real time according to the abnormal alarm; wherein the content of the first and second substances,
the alarm guidance information includes: power anomaly data, power anomaly region, and power anomaly magnitude.
The principle of the technical scheme is as follows: when the invention is used for alarming abnormally, the alarm system accessed by the communication connection unit can be used for alarming quickly. The online conversation thread can be established according to the real-time position of the electric power meter, the conversation thread is established independently, one-to-one communication is realized, so that the alarm is given out quickly, the real-time abnormal alarm is realized, and the accurate electric power alarm is carried out through comprehensive electric power abnormal guide information during the real-time alarm.
The beneficial effects of the above technical scheme are that: the invention can carry out rapid electric power alarm when the electric power is abnormal, and realizes accurate alarm information guide based on the electric power guide information, thereby realizing alarm.
In an optional embodiment, the abnormality warning device of the present invention performs an electric power warning, further comprising the steps of:
step A1: acquiring a data block of power data acquired by a power meter, and performing Fourier transform on the data block of the power data to construct a discretized power data model;
wherein D (U (T, D), V (T, K)) represents a power data model, U (T, D) i ) Representing the detected power data value at the time t; t represents a time; d i A power data value representing an ith data block; i belongs to n, wherein n represents the total number of data blocks of the power data;
v (T, K) represents a power abnormality data value in the detection period T; t total detection time of the power meter; k represents a power abnormality data value for the detection period; j represents the Dirichlet condition; f (t, K) represents a data function of the power anomaly;
in the step A1, the data model of the power data is constructed, and the state of the power data model in the state of the power abnormality is represented in the form of an exponential function, so that the power abnormality data in the power data can be accurately identified. In this process, in order to construct the data feature function based on each data block, data processing is performed on the data block, and then data information of power abnormality is determined through a power abnormality data value, wherein the power abnormality data K is an abnormal value of power data occurring in the data block of the power data, and when there is no abnormal value, the abnormal value of the power data is 0. A model of the entire power data is then built based on the form of an exponential function.
Step A2: inputting the electric power data model into an alarm guide model through an alarm guide unit, and determining the information characteristics of the alarm guide information:
wherein, delta (K) represents the information characteristic of the alarm guiding information, | K | calculation p An abnormal dynamic parameter in a norm p under the power abnormality data value representing the detection time period, γ represents the intensity of the power abnormality, and ω represents the magnitude of the power abnormality.
In step A2, the abnormal amplitude of the abnormal power data is mainly determined, and therefore the abnormal power data at each time is processed to construct an alarm guidance model, so as to perform alarm processing on the abnormal power data. The power guiding model is mainly used for determining the strength and the danger level of the power abnormity, so the invention introduces the amplitude omega of the power abnormity, wherein the omega represents the ratio of the real-time power data and the abnormity threshold power reference threshold value at each moment.
Step A3: and acquiring codes of data blocks of abnormal power data, determining a power abnormal area through the codes, and outputting the power abnormal area as alarm guide information through the information characteristics of the alarm guide information and the power abnormal area.
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 magnitude of the power abnormality are output in the form of data characteristics.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An electric power meter rated for a secondary current lower than 1A, comprising:
an electric power meter body; wherein the content of the first and second substances,
the electric power meter is characterized in that a first current sampling loop is arranged in the electric power meter body and 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 content of the first and second substances,
the first current sampling loop comprises a milliampere current transformer.
2. An electric power meter with a rated secondary current lower than 1A as claimed in claim 1, further comprising in said electric power meter body:
a transmission switching device: the first current sampling loop or the second current sampling loop is used for being externally connected with an external power supply and starting;
a second current sampling loop: the second power parameter information is determined by converting the current of the external power supply into a rated secondary current of 1A or 5A; wherein the content of the first and second substances,
the second current sampling loop comprises a rated current transformer;
an electric power output device: and the device 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.
3. An electric power meter having a secondary current rating below 1A as claimed in claim 1, further comprising:
the clock timer is used for determining that a plurality of power information maps are generated in a plurality of detection time periods of the preset routing inspection of the power instrument by continuously reading the time of the power instrument; wherein the content of the first and second substances,
the detection time period is as follows: the initial time to the end time;
the current detector is used for calculating fluctuation calculation through dichotomy from the initial time to the termination time and judging whether abnormal fluctuation values exist in the plurality of power information maps or not;
a transmission switching device: the filter 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 content of the first and second substances,
the transmission switching device comprises a first current path and a second current path; wherein, the first and the second end of the pipe are connected with each other,
the first current path is provided with a filter circuit;
the current detector includes: the device comprises a processor, an AD sampler and a sampling resistor; wherein, the first and the second end of the pipe are connected with each other,
the AD sampler and the sampling resistor are electrically connected with the input end of the transmission switching device;
the processor includes:
a section setting unit: the device comprises a sampling circuit, a sampling circuit and a sampling circuit, wherein the sampling circuit is used for acquiring the number of different sampling resistance values and an initial sampling value range which can be sampled by an 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 between the calibrated rated current parameter and the sampling standard value of each interval is constructed based on the corresponding relation between the calibrated rated current parameter and each target sampling interval; wherein, the first and the second end of the pipe are connected with each other,
the sampling standard value is a median value of the target sampling interval;
a second sampling unit: the AD sampling value at the sampling resistor of the transmission switching device is obtained;
an interval query unit: the device is used for 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 system is used for determining the rated current of the external power supply according to a preset sampling value-current value relation list and the sampling interval.
4. An electric power meter having a secondary current rating below 1A as claimed in claim 2, wherein said clock timer comprises:
the signal acquisition module: the system comprises a power supply, a data acquisition module and a data processing module, wherein the power supply is used for acquiring a voltage signal and an electric energy signal of the external power supply to obtain electric energy data;
a discrete filtering module: the discrete filtering processing module is used for performing discrete filtering processing on the electric energy data to obtain stable electric energy stable data;
a linear rectification module: the electric energy stabilizing data processing device is used for carrying out data linear correction processing on the electric energy stabilizing data to obtain electric energy specific data;
a spectrum module: and the electric energy data processing unit is used for generating an electric energy information map according to the electric energy specific data, wherein the electric energy information map comprises a voltage spectrum and a current spectrum.
5. An electric power meter having a secondary current rating below 1A as claimed in claim 2, further comprising:
the remote communication device: for transmitting the first and second power information to a remote user terminal;
the environment monitoring device comprises: the system comprises a plurality of sensing modules, a data acquisition module and a data processing module, wherein the sensing modules are used for acquiring sensing data; wherein the content of the first and second substances,
the sensing data includes: temperature data, humidity data, and barometric pressure data;
a data memory: for storing the first and second power information;
range adjusting device: the power detection range is adjusted according to the voltage of the external power supply;
an abnormality warning device: and the alarm device is used for alarming abnormality when the power information is abnormal.
6. An electric power meter with a rated secondary current lower than 1A as claimed in claim 5, characterized in that said remote communication means comprises:
the data receiving module is used for receiving query request data of a 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 related to 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 content of the first and second substances,
the query service of the user terminal includes: the system comprises a remote desktop application of a webpage version, an APP query function and a remote service center;
and the sending module is used for sending the query request data to the query service of the user terminal.
7. An electric power meter with a rated secondary current lower than 1A as claimed in claim 5, wherein said environment monitoring means comprises:
a temperature sensor: the temperature monitoring device is used for monitoring the internal temperature and the ambient temperature of the power meter and generating temperature data;
an air pressure sensor: the system is used for monitoring the air pressure of the electric power instrument and determining air pressure data;
a humidity sensor: and the humidity monitoring module is used for monitoring the humidity of the electric power instrument and acquiring the environmental humidity data of the electric power instrument.
8. An electric power meter with a rated secondary current below 1A as claimed in claim 5, 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 an encoding module: the device is used for respectively storing a plurality of data blocks into corresponding coding groups; wherein the content of the first and second substances,
the encoding set includes: a first encoding matrix and a second encoding matrix;
the coding group encodes the data blocks in all the coding groups through the first coding matrix to obtain global check blocks corresponding to all the coding groups, and encodes the data blocks in each coding group through the second coding matrix to obtain sub-check blocks corresponding to each coding group;
a storage calling unit: and the global check block is stored to a preset position, and the sub check blocks are stored to the corresponding coding groups.
9. An electric power meter rated for a secondary current less than 1A as claimed in claim 5, wherein said range adjusting means includes the range adjusting steps of:
collecting input voltage data of an external power supply within a time period to generate a voltage curve;
determining a voltage interval corresponding to the voltage data according to the voltage curve;
determining a corresponding target measuring range according to the voltage interval;
and acquiring the real-time measuring range of the electric power meter, and replacing the real-time measuring range with the target measuring range.
10. An electric power meter rated for a secondary current lower than 1A as set forth in claim 5, wherein said abnormality warning device comprises:
a communication connection unit: the remote communication device is used for accessing an online alarm system according to the remote communication device;
a thread building unit: the system comprises a processor, a conversation thread and a communication module, wherein the processor is used for determining the meter position of an electric power meter and creating an online conversation thread according to the meter position;
an alarm unit: the real-time abnormal alarm is carried out according to the online conversation thread;
an alarm guide unit: the alarm system is used for inputting alarm guide information to the online alarm system in real time according to the abnormal alarm; wherein, the first and the second end of the pipe are connected with each other,
the alarm guidance information includes: power anomaly data, power anomaly region, and power anomaly magnitude.
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