WO2016029773A1

WO2016029773A1 - Electrical measurement method based on reference energy

Info

Publication number: WO2016029773A1
Application number: PCT/CN2015/085446
Authority: WO
Inventors: 单立辉
Original assignee: 单立辉
Priority date: 2014-08-28
Filing date: 2015-07-29
Publication date: 2016-03-03
Also published as: CN106104282A

Abstract

An electrical measurement method based on reference energy comprises the following steps; acquiring a first reference signal from a circuit to be measured, wherein the first reference signal is a current signal or a voltage signal; multiplying the first reference signal by a second reference signal to obtain a reference power, wherein the second reference signal is a voltage signal or a current signal; performing time integration on the reference power within a preset time length to obtain reference electric energy; and judging an electrical state according to the reference electric energy. In the present application, electrical detection and fault diagnosis are achieved from the view of electrical energy of each time period, it is particularly analysed with regard to middle and early warning of hidden electrical trouble, so that the electrical detection difficulty is reduced.

Description

Electrical measurement method based on reference energy

This application claims to be filed on August 28, 2014 with the Chinese Patent Office, application number 201410445704.X, and the Chinese patent application entitled "An Energy-Based Electrical Measurement Method and Apparatus" and submitted on August 28, 2014. The priority of the Chinese Patent Application No. 201410445703.5, entitled "E.

Technical field

The present application relates to the field of electrical measurement technology, and in particular, to an electrical measurement method based on reference energy.

Background technique

In many of today's electrical testing processes, some important electrical fault parameters are difficult to measure directly with existing instruments. Some electrical parameters differ greatly in the state of the power outage and the operating period. Most electrical operating conditions and fault conditions can be accurately described by parameters such as current and voltage, but current and voltage are time-varying transient parameters. In particular, the abnormal current and voltage of non-metallic insulation faults vary greatly with time. In the early stage of most electrical hazards, the transient electrical parameters are normal for most of the time, and the occurrence of abnormal events is statistically significant: over time As the transition progresses, the frequency of occurrence increases and the value gradually increases.

Since the 1950s, according to China’s power equipment preventive test procedures, the power equipment Conduct regular power outage test, overhaul and maintenance, but periodic tests can not find hidden faults inside the equipment in time. The power failure test applies a test voltage lower than the operating voltage, and is not sensitive enough to reflect certain defects; current power equipment maintenance system is in the forward state maintenance Direction development. Some new electrical online fault monitoring technologies have been widely used at home and abroad, including transformers, circuits, motors, capacitors and other series of microcomputer-based integrated measurement and control protection (referred to as: microcomputer comprehensive insurance) products and technology development is very mature, but currently Lack of hidden online monitoring devices and technologies; fault recording technology is currently used in a variety of electrical online fault monitoring technology, which detects real-time sampling points during the fault by real-time detection of current and voltage time-varying transient parameters. The resulting waveform map reflects the fault condition. However, the fault recording needs to store a large amount of data. If a single-cycle (20 millisecond) fundamental wave of a 50 Hz power frequency electrical signal uses 12 16-bit words to form waveform data, a set of fault recording waveform data with a current and voltage of only 10 minutes. Need to store 1.44 million bytes. On the other hand, the value of the electrical anomaly parameter is generally much smaller than the fault value. Outside the scope of the fault recorder monitoring, expanding to the anomalous recording will cause more massive data to be stored, which is obviously not the advantage of the embedded microcontroller system. Where.

For the detection of individual voltage or current signals, in addition to the fault recording technology, there are methods for utilizing voltage integration and current integration. For example, Japan’s Toyota Motor Co., Ltd. applied for an invention patent in China, “An abnormal power supply device capable of detecting current flowing through a drive circuit” (Patent No.: CN200510079921), using current-time integral calculation, passing the integral and threshold Comparison, judging whether the current is abnormal; Japanese Furukawa Electric Co., Ltd. invention patent "state detection method and device of power storage equipment" (patent number: CN201080036072), using voltage to time integral calculation, using the voltage integral as a battery The amount of state of charge. Inventor Technology of the US General Motors Global Technology Operation Co., Ltd. "Excess Current Detection Control Method" (Patent No.: CN201110311305), also uses the integrated value of current to time, judges whether the threshold value is exceeded, and starts the relevant control behavior. Rockwell coils (also translated as Rogowski coils) are new technology products that have emerged in recent years and are also calculated using differential integrals.

Summary of the invention

Based on the technical problems existing in the background art, the present application proposes an electrical measurement method based on reference energy.

A reference energy-based electrical measurement method proposed by the present application includes the following steps:

Collecting a first reference signal from the circuit to be tested, the first reference signal being a current signal or a voltage signal;

Multiplying the first reference signal and a second reference signal to obtain a reference power, and the second reference signal is a voltage signal or a current signal;

The reference power in the preset time length is time-integrated to obtain reference energy;

The electrical state is judged based on the reference electric energy for each time period.

Preferably, when the electrical state is abnormal, the determination of the abnormality includes the following steps:

Refine the time period of the abnormality and decompose it into multiple time segments;

Each time segment reference energy is analyzed and compared to determine the time period of the abnormality and the development change between the time periods.

Preferably, the second reference signal is a preset constant.

Preferably, the second reference signal is an auxiliary signal generated by a manual auxiliary module of the peripheral.

An electrical measurement method based on reference energy, comprising the following steps:

Obtaining at least one initial signal pair, each initial signal pair being taken from a circuit to be tested The first reference signal and the second reference signal are combined, the first reference signal is a current signal or a voltage signal, the second reference signal is a voltage signal or a current signal, and the first reference signal and the at least one initial signal pair The second reference signal is a homologous signal having a phase relationship;

Multiplying the first reference signal and the second reference signal in each initial signal pair to obtain a corresponding reference power;

The electrical state is judged based on the reference electrical energy.

Preferably, the initial signal pair (especially the signal pair with phase relationship) is connected to the energy metering module or the external energy metering chip embedded in the microcontroller, and the various active parameters and reactive parameters including the reference power source are obtained. The high-precision electrical parameter set within the device determines the electrical state in multiple directions based on the electrical parameter set.

In the present application, the product of voltage and current is multiplied and the product (power) is integrated with time, and the data is calculated and processed, and the time-varying transient voltage and current which are easy to disappear with time are converted into not lost over time. A statistical reference power parameter having cumulative quantizable characteristics, and obtaining a high-precision electrical parameter set composed of a plurality of relevant reference parameters for the initial signal pair, wherein the reference power parameter is the core. By referring to the mutual comparison of electrical energy values (analysis of abnormal development trends) and self-comparison (determining whether abnormalities occur and abnormal severity), combined with the actual working conditions and environmental factors of electrical monitoring objects, it is judged whether electrical faults have occurred. If the electrical fault has been generated, further analyze the hidden dangers and trends in different time periods, and judge and judge the specific electrical equipment used in different time periods according to the difference of reference energy values in different time periods, or generate For electrical lines.

In the present application, separate or paired transient voltage and current signals are generated to generate reference power, and the reference power within a preset time length is time-integrated to obtain reference energy for each time period. Electrical energy is an important electrical parameter that can directly and quantitatively measure the working condition of electrical monitoring objects. It is undoubtedly the core basis for electricity charging. In the field of electrical testing technology, electrical energy parameters reflect the currents containing abnormal potentials. The voltage signal accumulates in the total amount of each time period, and the total amount of electrical hazard analysis on the time axis has the advantage that other electrical parameters are difficult to replace.

Compared with the current integration method and voltage integration patent method applied by the General Motors Global Technology Operation Co., Ltd. in the technical background, the present application unifies two different abstract methods of current integration method and voltage integration into well-known ones. The energy reference method related to the energy concept, on the other hand, by constructing a voltage-current signal pair with a phase relationship, combined with a mature technology such as a high-precision DSP energy metering module and an energy metering chip, directly obtaining a plurality of active and reactive parameters The electrical parameter set realizes the multi-directional judgment and analysis of the electrical state, especially for the early warning analysis of electrical hazards, reduces the difficulty of electrical detection, and obtains a high-precision electrical test capable of performing total statistics and segmentation analysis along the time axis. method.

DRAWINGS

1 is a flow chart of an electrical measurement method based on reference energy in Embodiment 1;

2 is a flow chart of an electrical measurement method based on reference energy in Embodiment 3.

detailed description

In the present application, the same type of signal refers to the same voltage signal or current signal, such as zero sequence current, residual current, phase current is the same type of signal, zero sequence voltage, phase voltage, artificial auxiliary voltage are similar signals; homologous signal refers to the same The current signal and the voltage signal output by the busbar have a phase relationship between the homologous signals; the reference energy refers to an energy mainly having a reference meaning, and the document includes both the electrical energy of the virtual structure and the electrical energy having the actual electrical meaning. Referred to collectively as reference energy (herein referred to as reference electrical energy or simply reference electrical energy); reference power refers to the power corresponding to the reference energy.

Example 1

The reference energy-based electrical measurement method provided in the first embodiment includes the following steps:

S11. Collect a first reference signal from the circuit to be tested.

In this embodiment, the first reference signal is a residual current.

S12. Multiply the first reference signal and a second reference signal to obtain a reference power.

The second reference signal is generally a fixed value constant K, and may be a unit voltage of 1 V or a 10 N times power of 1 A, and N is an integer. For example, when a separate first reference signal is input for a weak external input, N is generally 1, 2, 3 and other positive integers, to achieve amplification. On the other hand, when N is -1 or -2, the reduction effect is achieved. When N=0, it means that K is a unit voltage of 1V or 1A. In some cases, especially for the measurement of current-like signals, the value of K is related to the appropriate voltage value in the electrical monitoring object, and there will be actual electrical and physical significance. For example, the power grid can take K=220V, and the power battery can Take K=48V or 24V according to the nominal value of its voltage.

S13. Time-integrate the reference power within a preset time length to obtain reference energy.

S14. Determine the electrical state according to the energy analysis according to each time period.

Wherein, when the electrical state is abnormal, the determination of the abnormality includes the following steps: refining the time period of the abnormality and decomposing into multiple time segments; analyzing and comparing each time segment reference power to determine the time period of the abnormality And changes in development over time.

In the first embodiment, the reference electric energy is an integral signal, and the integral signal is an accumulated amount. In the actual calculation of the product user program, the integral calculation can be realized by the cumulative calculation of the minute time unit.

In a large time range, it can be divided into several preset time periods. For example, one year can be divided into 12 months, and one hour can be divided into 60 minutes. The smaller the preset time length, the easier it is to obtain subtle changes in electrical hazards. the amount. Specifically, the preliminary hidden danger judgment can be performed by integrating the long time period, and then the time period in which the hidden danger is located is refined, and time-segmented but continuous with each other in different time levels such as month, day, hour, or even minute is generated. The frozen data of the reference electric energy; through the freezing data of the reference electric energy in each time period, the occurrence of hidden dangers of electrical abnormalities, the auxiliary identification of hidden danger points, the degree of hidden dangers and the development trend of hidden dangers are monitored to realize the monitoring and early warning of electrical safety hazards.

The reference energy based electrical measurement method is explained below in connection with a specific electrical measurement system.

An electrical measurement system proposed in this embodiment includes: a signal acquisition module, a control processing module, and an input module, wherein:

The signal acquisition module is configured to collect the residual current as the first reference signal;

The control processing module is connected to the signal acquisition module, and is configured to receive the first reference signal and multiply the first reference signal by a preset second reference signal, that is, a custom constant K, to obtain a reference power, which is an integer multiple of the voltage standard value, such as 100V. Or 220V, try to take the 220V single-phase power supply system K = 220V. The control processing module integrates the reference power, obtains the integral value generated within the preset time length as the reference power and performs storage freezing, and then determines the electrical state according to the reference electrical energy in each time period;

The input module is connected to the control processing module, which can be used to input an operation instruction, and the second reference signal can also be preset through the input module.

The reference power is the product of the current signal and the voltage signal. In this embodiment, the first reference signal uses a current signal, and the second reference signal uses a voltage signal. In specific implementation, the first reference signal may also be a voltage type signal, and the second reference signal The current signal is used. For example, the first reference signal uses a leakage voltage collected by the circuit to be tested, and the second reference signal uses an integral multiple of the current standard value such as 1A.

The reference electrical energy involved in this embodiment is not the direct physical electrical energy actually existing in the electrical monitoring object, but is a virtual reference energy, but linearly proportional to voltage integration or current integration.

In any period of time, the continuity of the value of the individual input voltage signal or current signal is accumulated, which determines the value of the reference energy. On the contrary, the value of the reference electric energy in any period of time also directly reflects the total degree of change (quantity change) and property change (quality change) of the externally input individual voltage signal or current during the period.

The preset second reference signal K is divided into the above-mentioned custom constants, and the patent also includes that K can be a regular variable or the like which can achieve the same effect.

Example 2

The second embodiment differs from the first embodiment in that the second reference signal is an auxiliary signal generated by a manual auxiliary module provided inside the device.

The electrical measurement system provided by the second embodiment for implementing the above reference energy-based electrical measurement method comprises: a signal acquisition module, a control processing module, a manual auxiliary module and an input module, wherein:

The signal acquisition module is configured to collect the output voltage of the vehicle power battery as a first reference signal, and the manual auxiliary module is configured to generate an auxiliary signal as the second reference signal;

The control processing module is respectively connected to the signal acquisition module and the manual auxiliary module, and receives the first reference signal and the second reference signal, and multiplies the first reference signal and the second reference signal to obtain a reference power. The control processing module performs an integral operation on the reference power to obtain an integral value generated within a preset time length as a reference power and stores the power, and then determines the electrical state according to the reference power in each time period;

The input module is coupled to the control processing module and can be used to input operational commands.

The control processing module in the second embodiment can be implemented by using an energy metering chip.

The reference power is the product of the current signal and the voltage signal. In the second embodiment, the first reference signal uses a current signal, and the second reference signal uses a voltage signal. In specific implementation, the first reference signal may also adopt a voltage signal, and the second reference signal The current signal is used. For example, the first reference signal uses the residual voltage collected by the circuit to be tested, and the second reference signal uses an integral multiple of the current standard value such as 1A.

The electrical measurement system in the second embodiment further includes a display module and a communication module, wherein the control processing module can combine the reference energy value of each time period to analyze and compare the actual working condition and environmental factors of the electrical monitoring object (power battery). It is judged whether a battery fault has occurred, for example, in the parking state, a reference energy having a large negative direction change (voltage drop direction) is generated, and the battery voltage has significant leakage or battery performance degradation. According to different time periods With reference to the difference in electrical energy values, the degree of hidden dangers and their changing trends in different time periods are further analyzed in detail, and then the detection results are outputted through the display module and the communication module, and the relevant event data is stored and recorded, and the alarm or start is timely based on the severity of the electrical hazard. Protect the action and prevent the deterioration of electrical faults.

The electrical measurement system provided in the second embodiment is particularly suitable for early detection in electrical hazards. The abnormal phenomenon generated in the early stage of electrical hazards is relatively weak, but the reference energy generated by the high-precision acquisition process has the characteristics of “small accumulation and more”. The difference in the reference energy accumulation amount in different time periods is identified and judged.

Example 3

The third embodiment focuses on: "zero sequence voltage × zero sequence current" of the three-phase power supply system, and "remaining current × phase voltage" of the single-phase power supply system.

The reference energy-based electrical measurement method provided in Embodiment 3 includes the following steps:

S31, obtaining no less than one initial signal pair, each initial signal pair consisting of a first reference signal and a second reference signal collected from the circuit to be tested, the first reference signal being a current signal such as zero sequence current, remaining Current, phase current, etc., the second reference signal is a voltage signal such as a zero sequence voltage, a phase voltage, etc., and the first reference signal and the second reference signal of the at least one initial signal pair are homologous signals (in the third embodiment) Zero sequence current and zero sequence voltage).

S32. In combination with the existing energy metering chip technology, the signal pair is respectively connected to the energy metering chip sub-module included in the control processing module (including the independent energy metering chip and the energy metering module embedded in the microcontroller). Corresponding to the input pin, multiplying the first reference signal and the second reference signal in each initial signal pair by the energy metering chip sub-module to obtain a corresponding reference power;

S33. Using the energy metering chip technology, time-integrating the reference power to obtain reference energy within a preset time length;

S34. The control processing module determines the electrical state according to the reference electrical energy.

Wherein, when the electrical state is abnormal, the reference electrical energy of the abnormal time period is refined and decomposed into a plurality of time segments; each time segmented reference electrical energy is analyzed and compared and stored, and the abnormal time zone is determined, and Developmental changes between time periods.

In the reference energy-based electrical measurement method, since at least one reference power is obtained by multiplying the homologous signals output by the same bus, and there is a phase angle between the homologous signals, a plurality of active electrical parameters and reactive electrical power can be obtained. The parameters form a rich set of electrical parameters for multi-dimensional judgment of the electrical state.

An electrical measurement system for implementing the reference energy-based electrical measurement method according to Embodiment 3 includes: a first signal acquisition module, a second signal acquisition module, a control processing module, an input module, a display module, and a communication module. The control processing module is respectively connected with the first signal acquisition module, the second signal acquisition module, the input module, the display module and the communication module, wherein:

The first signal acquisition module is configured to collect a current signal such as a zero sequence current, a residual current, a phase current, and the like as a first reference signal; and the second signal acquisition module uses a voltage signal such as a zero sequence voltage, a phase voltage, or the like as a second reference signal. ;

The control processing module obtains not less than one first reference signal and not less than one second reference signal from the first signal acquisition module and the second signal acquisition module, respectively, and performs pairwise multiplication of the first reference signal and the second reference signal The reference power is obtained, such as "zero sequence current x zero sequence voltage", "residual current x phase voltage", "phase current x phase voltage", and the like. The control processing module integrates each reference power to obtain a plurality of reference powers.

Since the homologous signal has a phase angle, the control processing module can multiply the current and voltage according to the first reference signal and the second reference signal, and integrate the time to obtain the reference electric energy, and obtain the series with the reference electric energy parameter as the core. Electrical parameters can be referenced to generate a set of electrical parameters. The series of parameters in the electrical parameter set are high in precision and abundant in quantity, including various positive and negative active and reactive power reference energy, power and power direction and other electrical energy parameters, as well as fundamental waves reflecting real-time status and various harmonic voltages, currents, etc. parameter. The electrical energy parameters may or may not have actual physical and electrical meanings, but can intuitively reflect the working conditions and hidden dangers (quantity change) of the electrical monitoring object, the change of the hidden danger property (quantity to qualitative change) and its changing trend, and can be used as electrical The core basis for monitoring the working condition detection, hidden danger diagnosis and its trend analysis and early warning.

Then, the control processing module outputs the detection result through the display module and the communication module, and records and stores the relevant event data, and timely warns the alarm or initiates the protection action according to the severity of the electrical hazard to prevent the deterioration of the electrical hidden danger. The input module can be used to input an operation instruction, and the input module can specifically adopt a button module or a touch screen.

This application adopts a series of reference electrical energy parameters as the core to refer to electrical parameters. For different specific electrical testing technical requirements, various specific implementation forms can be designed.

In the third embodiment, the paired "zero sequence voltage x zero sequence current" product combination signal pair is combined with the energy metering chip to convert the time-varying transient zero-sequence voltage and zero-sequence current which are easy to disappear with time, and generate zero. Reference energy freezing data, and obtain positive active energy, reverse active energy, positive reactive energy, reverse reactive energy, active power and direction, reactive power and its direction, voltage, and Current, phase angle, frequency, and refined reference fundamental active energy, fundamental active power, harmonic active energy, harmonic active power, harmonic reactive energy, harmonic reactive power, fundamental voltage, harmonic Voltage, fundamental current, harmonic current, fundamental power factor, harmonic A large number of high-precision electrical parameters such as power factor. According to the actual specific technical requirements, select the appropriate partial parameters, and then calculate the appropriate secondary processing parameters such as insulation resistance, capacitive reactance and dielectric loss angle through the control processing module calculation. The two parts of different source parameter data can be combined to form electrical reference series. A collection of parameters, with reference energy parameters as the core.

In the third embodiment, the paired "remaining current x phase voltage" product combination is combined, and the series of reference electrical parameter sets with the reference electric energy parameter as the core is obtained through the analysis processing of the electric energy metering chip. For the single-phase power supply system, it is very important to analyze the hidden danger of electrical insulation and the hidden danger of electrical fire. Through the active energy Ep, active power P, residual current Is and phase voltage U, the line insulation resistance Rj is obtained.

Rj=U×U/P (U is the phase voltage of the single-phase power supply system)

In the third embodiment, the residual current generated by the product combination of “residual current×phase voltage” refers to the active energy, which basically belongs to the leakage electric energy through the impedance to the ground, and defines a total time period and each sub-period in C language. Reference active power structure variable Day_Ep, wherein the scope of the claims of the present application is not limited to these specific numbers:

During normal operation, the referenced active energy Ep in the set of reference energy parameters is stored for each hour of the electrical monitoring object, and the residual current related active energy Day_Ep.hour[n] generated by each hour of each day is recorded separately (where 0 =<n=<23) and the total leak of active power tested every day Can Day_Ep.total, record and store every day. If the value of the active energy Day_Ep.total of a certain day is significantly higher than the Day_Ep.total value of the active energy generated on other days, the active energy Day_Ep.hour[n] of each hour is further compared to determine whether it is caused by environmental factors such as rain and rain.

If it is determined that electrical insulation hazards have occurred, further detailed diagnostic processing is enabled to enable more subdivided active energy structure variable members such as minutes in minimum time units: Day_Ep.minute[i] (where 0=<i<60) Detailed analysis of hidden dangers and hidden dangers of electrical monitoring objects, and according to the difference of active energy values in different time periods, assisting management personnel to accurately determine whether the hidden dangers are generated by certain specific electrical equipment used in different time periods, or whether they are always working. Electrical lines to prevent the development of electrical faults from deteriorating.

Example 4

The difference between the fourth embodiment and the third embodiment is that the electrical measurement system provided by the fourth embodiment for implementing the above reference energy-based electrical measurement method further includes a manual auxiliary module connected to the control processing module. From the electrical point of view, the current signal is also converted into a voltage signal through the sampling resistor, so the analog input pins such as the energy metering chip and the ADC analog-to-digital converter chip actually collect the voltage signal, so the auxiliary signal provided by the manual auxiliary module is actually the voltage. The signal can be realized by using a voltage dividing circuit, a voltage stabilizing output chip, and the like.

In the fourth embodiment, the auxiliary signal provided by the manual auxiliary module can be paired with the externally collected current type signal or voltage type signal. It is actually an independent tool for monitoring and analyzing current statistics. Among the many electrical parameters generated by the product combination with the artificial auxiliary signal, there is generally no phase relationship. Due to phase mismatch, the parameters such as active and reactive power become meaningless, but power and electrical energy have important reference significance. Virtual reference power and reference energy.

Embodiment 3 and Embodiment 4 are designed by converting a set of time-varying transient voltage and current parameters. The technical method of real-time monitoring and diagnosis analysis of the working and abnormal state of the electrical monitoring object can be referred to the series of electrical energy parameters with the total amount of electrical energy accumulated in the time axis as the core. Electrical detection and abnormal diagnosis are realized from the perspective of electrical energy, especially for the early warning and early warning analysis of electrical hazards. The abnormal phenomena in the early stage of electrical hazards are relatively weak. It can be accumulated into the total parameters by means of high-precision acquisition technology, and the comparison and self-comparison methods are used to analyze and judge. In the middle and late stage of electrical hazards, various monitoring modes and The combination of subdivision methods in different time periods and the use of trend analysis and other means for diagnostic analysis can more clearly reflect the causes of hidden dangers, the degree of hidden dangers and their development trends.

The reference power is the product of the current signal and the voltage signal. In the above two embodiments, the first reference signal uses a current signal, and the second reference signal uses a voltage signal. In specific implementation, the first reference signal may also adopt a voltage signal, and the second reference The signal uses a current signal.

The foregoing is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any technical person skilled in the art is within the technical scope disclosed by the present application, according to the technical solution of the present application. Equivalent substitutions or changes to the application and its application are intended to be included within the scope of the present application.

Claims

A reference energy based electrical measurement method, comprising the steps of:

Collecting a first reference signal from the circuit to be tested, the first reference signal being a current signal or a voltage signal;

Multiplying the first reference signal and a second reference signal to obtain a reference power, and the second reference signal is a voltage signal or a current signal;

The reference power in the preset time length is time-integrated to obtain reference energy;

The electrical state is judged based on the reference electric energy for each time period.
The energy-based electrical measurement method according to claim 1, wherein when the electrical state is abnormal, the determination of the abnormality comprises the following steps:

Refine the time period of the abnormality and decompose it into multiple time segments;

Each time segment reference energy is analyzed and compared to determine the time period of the abnormality and the development change between the time periods.
The reference energy-based electrical measurement method according to claim 1, wherein the second reference signal is a preset constant.
The reference energy-based electrical measurement method according to claim 1, wherein the second reference signal is an auxiliary signal generated by a built-in manual auxiliary module.
A reference energy based electrical measurement method, comprising the steps of:

Obtaining at least one initial signal pair, each initial signal pair being composed of a first reference signal and a second reference signal collected from the circuit to be tested, the first reference signal being a current signal or a voltage signal, and the second reference signal being a voltage Signal or current signal, and at least one initial signal pair The first reference signal and the second reference signal are homologous signals having a phase relationship;

Multiplying the first reference signal and the second reference signal in each initial signal pair to obtain a corresponding reference power;

The reference power in the preset time length is time-integrated to obtain reference energy;

The electrical state is judged based on the reference electrical energy.
The reference energy-based electrical measurement method according to claim 5, wherein the initial signal pair is connected to the power metering module or the external energy metering chip embedded in the microcontroller, and the high-precision electrical with reference energy as the core is obtained. The parameter set determines the electrical state in multiple directions based on the electrical parameter set.
The energy-based electrical measurement method according to claim 5, wherein when the electrical state is abnormal, the determination of the abnormality comprises the following steps:

Refine the time period of the abnormality and decompose it into multiple time segments;

Each time segment reference energy is analyzed and compared to determine the time period of the abnormality and the development change between the time periods.