CN109345752A - A kind of electrical safety monitoring and pre-alarming method and device - Google Patents
A kind of electrical safety monitoring and pre-alarming method and device Download PDFInfo
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- CN109345752A CN109345752A CN201811482546.XA CN201811482546A CN109345752A CN 109345752 A CN109345752 A CN 109345752A CN 201811482546 A CN201811482546 A CN 201811482546A CN 109345752 A CN109345752 A CN 109345752A
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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Abstract
The invention belongs to electrical safeties to monitor field, disclose a kind of electrical safety monitoring and pre-alarming method and device, this method includes the first monitoring parameters of acquisition electric loop, and by the first monitoring parameters compared with given threshold, according to comparison result early warning electrical safety hidden danger.First monitoring parameters include: remaining active power and load power or/and resistive residual current or/and insulation conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power；Wherein, remaining active power is as judging whether electrical safety hidden danger occurs the monitoring parameters on electric wiring, and load power is as judging whether electrical safety hidden danger occurs the monitoring parameters in electrical equipment；Resistive residual current is as residual current class electric disaster hidden-trouble monitoring parameters；Insulation conductance is as electric insulation hidden danger monitoring parameters；Intermittent electric leakage harmonic current and intermittent electric leakage harmonic power are as fault electric arc monitoring parameters；The present invention can be realized comprehensive efficient monitoring of electrical safety.
Description
Technical field
The present invention relates to electrical safeties to monitor field, specifically a kind of electrical safety monitoring and pre-alarming method and device.
Background technique
Extensive with electric power application is popularized, and the accidents such as electrical safety, electrical fire occur quantity and also dramatically increase.It is special
Be not China at this stage, electrical fire incidence remains high for a long time, and electrical fire accounts for 30% or so in China's fire total amount,
Electrical fire ratio is up to 60% in fire accidents, according to another fire-fighting army unit of Anhui Province introduce, die people's fire incident substantially by
Caused by electrical fire, this is because electrical fire have the characteristics that concealment is strong, burning rapidly, mostly nocturnal, it is aggrieved
Person does not have enough escape times.
Electric insulation aging is the main reason for generating electric fault, safety accident, electrical fire, to directly contribute leakage
Electricity, ground connection, fault electric arc, the even hidden troubles such as short circuit, 80~90% electric fault is by electric insulation aging according to statistics
Caused by directly or indirectly.
The Chinese government formulated electrical fire monitoring technical standard since 2005, had had a large amount of Related product in reality
Border uses, but electrical fire incidence does not effectively reduce, and proportion maintains 30% in fire total quantity for many years
Left and right.And the developed countries such as Europe, the United States, Japan, by with the promotion and popularization of electrical fire monitoring technology and product, significantly
Reduce electrical fire incidence, at present Japan electrical fire in fire total quantity proportion less than 3%.
The monitoring and warning of electrical safety hidden danger, effectively anticipation, it is most important to prevention electrical safety.Application number
201510036076.4 " a kind of power measuring terminal and electric fire monitoring method " disclosed in data of publication of application 2015.05.27
It points out, which realizes the anticipation of electrical fire by the leakage current on load circuit, which exists
When use, monitoring means is single, cannot effectively realize the monitoring of electrical safety hidden danger comprehensively.And once popular mistake in the market
Residual-current electrical fire monitoring system have the defects that cannot distinguish between residual current the parts such as resistive and perceptual and
Deficiency the inductive loads equipment such as illuminates in elevator, frequency conversion and uses more occasion, and perceptual residual current belongs to normal parameter, and one
As will not cause fire, and then will cause a large amount of wrong reports.
Therefore, develop a kind of comprehensively efficient electrical safety method for early warning and device is of great significance.
Summary of the invention
The object of the present invention is to provide a kind of electrical safety monitoring and pre-alarming method and devices, to overcome the prior art electrically to pacify
The defect and deficiency that full monitoring technology monitoring means is single, monitoring technology application is limited, it can be realized the comprehensive of electrical safety
Efficiently monitoring.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of electrical safety monitoring and pre-alarming method, comprising the following steps:
Obtain the first monitoring parameters of electric loop；
First monitoring parameters include: electric leakage active power or/and load power or/and resistive residual current or/
With insulation conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power or/and intermittent Load harmonic electricity
Stream and intermittent Load harmonic power；
Wherein, the electric leakage active power, which is used as, judges whether electric loop occurs electric insulation class hidden danger or residual current
The monitoring parameters of class electric disaster hidden-trouble, the load power is as judging whether electric loop occurs overcurrent or short-circuit hidden danger
Monitoring parameters；
The resistive residual current is as residual current class electric disaster hidden-trouble monitoring parameters；
The insulation conductance is as electric insulation hidden danger monitoring parameters；
The monitoring of the intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power as fault to ground electric arc
Parameter；
The intermittent Load harmonic electric current and the intermittent Load harmonic power are used as to not between isopen or phase zero
Line line fault electric arc, same root phase line or the serial type fault electric arc on zero curve monitoring parameters；
In the present invention, in single-phase electric loop, intermittent Load harmonic electric current described in the same time and the intermittent leakage
The difference of the difference of electric harmonic current and/or the intermittent Load harmonic power and the intermittent electric leakage harmonic power, makees
The monitoring parameters of the serial type fault electric arc on line line fault electric arc, phase line or zero curve between phase zero；
It include electric disaster hidden-trouble according to comparison result monitoring and warning by first monitoring parameters compared with given threshold
Electrical safety hidden danger inside.
Electrical safety monitoring and pre-alarming method of the present invention, residual current class electric disaster hidden-trouble monitoring parameters further include
Residual current fundamental wave.
Electrical safety monitoring and pre-alarming method of the present invention, electric insulation hidden danger monitoring parameters further include insulation resistance.
Electrical safety monitoring and pre-alarming method of the present invention also wraps before obtaining the first monitoring parameters of electric loop
It includes:
The voltage and current or voltage, electric current and residual current or firewire electric current and neutral line current of acquisition electric loop,
Wherein:
The voltage is as over-voltage, under-voltage monitoring parameters；
The electric current is as overcurrent, the monitoring parameters of short circuit；
The vector difference of the firewire electric current and neutral line current is also used as residual current class electric disaster hidden-trouble monitoring parameters.
Electrical safety monitoring and pre-alarming method of the present invention, intermittent electric leakage harmonic current is according to the harmonic wave of residual current
Part obtains；The intermittent Load harmonic electric current is obtained according to the harmonic of load current.
Electrical safety monitoring and pre-alarming method of the present invention, by first monitoring parameters compared with given threshold, root
According to comparison result early warning electrical safety hidden danger, specifically include:
First monitoring parameters integrate multi-section time span, obtain the first integral prison of multi-section time span
Parameter is surveyed, and every section of time span is divided into multiple periods and is integrated, obtains the of each period in every section of time span
One integral monitoring parameters；
By the first integral monitoring parameters of each period compared with given threshold, when the first integral on the period
Monitoring parameters are greater than given threshold, and defining the period is abnormal time section, and carries out early warning to the abnormal time section.
Electrical safety monitoring and pre-alarming method of the present invention carries out early warning to abnormal time section and specifically includes:
When one of them period in multiple periods first integral monitoring parameters relative to given threshold be mutated, then dash forward
Become the corresponding period as abnormal time section, wherein being mutated corresponding time segment boundary is abnormal time section boundary, it is abnormal
The time first integral monitoring parameters of segment boundary surrounding time section are freezed and are stored；
Multiple time subsegments are refined as according to time span to the first integral monitoring parameters of abnormal time section to carry out into one
Step integral, the subproduct for obtaining each time subsegment in abnormal time section divides monitoring parameters, according to each time subsegment and each time subsegment
Corresponding subproduct divides the intensity of anomaly and anomalous variation trend three of the abnormal place timing node of monitoring parameters judgement, each time subsegment
One of person or a combination thereof.
A kind of electrical safety monitoring warning device, comprising:
Module is obtained, for obtaining the first monitoring parameters of electric loop；
First monitoring parameters include: electric leakage active power or/and load power or/and resistive residual current or/
With insulation conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power or/and intermittent Load harmonic electricity
Stream and intermittent Load harmonic power；
Wherein, the electric leakage active power, which is used as, judges whether electric loop occurs electric insulation class hidden danger or residual current
The monitoring parameters of class electric disaster hidden-trouble, the load power is as judging whether electric loop occurs overcurrent or short-circuit hidden danger
Monitoring parameters；
The resistive residual current is as residual current class electric disaster hidden-trouble monitoring parameters；
The insulation conductance is as electric insulation hidden danger monitoring parameters；
The monitoring of the intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power as fault to ground electric arc
Parameter；
The intermittent Load harmonic electric current and the intermittent Load harmonic power are used as to not between isopen or phase zero
Line line fault electric arc, same root phase line or the serial type fault electric arc on zero curve monitoring parameters；
Processing module connects the acquisition module, for by first monitoring parameters compared with given threshold, and according to
Comparison result early warning electrical safety hidden danger.
Electrical safety monitoring warning device of the present invention, further includes:
Acquisition module, the acquisition module are arranged on electric loop, for acquire electric loop voltage and current or
Voltage, electric current and residual current or firewire electric current and neutral line current.
Electrical safety monitoring warning device of the present invention, processing module specifically include:
Integral Processing submodule connects the output end for obtaining module, is used for first monitoring parameters to selected
Time is integrated, and is obtained first integral monitoring parameters and is freezed to store；
Comparative sub-module connects the output end of the Integral Processing submodule, is used for the first integral monitoring parameters
Compared with given threshold, and obtain abnormal time section；
Early warning handles submodule, the output end of the Comparative sub-module is connected, for described in the abnormal time section
First integral monitoring parameters are handled, and realize the early warning of electrical safety hidden danger.
One aspect of the present invention is by the integral related transient state electric signal to the time, the number of related transient state electric signal
According to from a certain moment instantaneous value, the integrated value in each period is converted to, so that the tiny signal for being difficult to differentiate is transformed into appearance
The sufficiently large signal easily observed realizes the enlarge-effect to small-signal and its variation, increases substantially the monitoring of early stage hidden danger
Precision.
The present invention does not rely on related transient state mechanically and electrically carries out integral raising sensor monitoring accuracy to the time.This is
Because all there is gradual change and mutation in physical world various change, usually in a few hours or a few days or several months long-time transitional stage or
The integral parameter value of process, may be less than or even much smaller than several seconds or a few minutes very short time is mutated the integral parameter in stage
Value.If the integral parameter transitional stage and mutation stage that resolution is not added mixes, transitional stage of just necessarily erasing
With mutation stage respective characteristic information, Practical significance is greatly reduced.The specific each period integral parameter value of the present invention, core packet
Containing the integral of each period to sport boundary.
Beneficial effects of the present invention are as follows:
Monitoring and warning substitution monitoring alarm is the inexorable trend of electrical safety technology development.Electrical early stage hidden danger has signal
It is the features such as faint, variation is slowly, data volume is big, big absolutely although under cover various information need to express in these mass datas
Partial data also uploads to cloud and puts down both without the value of local mass storage without occupying large capacity public-network bandwidth and floating resources
The value of platform.The present invention is used comprising carrying out to be mutated start-stop as the time integral parameter of each period coherent signal on boundary
Data aggregate optimization, is greatly reduced valid data amount, improves faint hidden danger precision by optimization polymerization, monitors in early stage hidden danger
There is significant actual effect in early warning.
The present invention can be realized the monitoring of the electrical safety hidden danger on electric wiring by the remaining active power, pass through
The load power realizes the electrical safety hidden danger monitoring in electrical equipment, so can be realized electric loop electric wiring,
The monitoring of electrical safety hidden danger in electrical equipment, realizes the monitoring of electric loop.
At the same time it can also realize caused electrical safety hidden danger monitoring of insulating by insulation conductance, realize event by electric leakage
Hinder electrical safety perils detecting caused by electric arc, and then realize the detection for realizing different types of electrical safety, ensure that prison
The generalization of survey；And wrong report caused by the perceptual residual current for avoiding electrical safety is realized by resistive residual current, monitoring
Position is comprehensive, monitoring type is comprehensive, monitoring effect accuracy is good, and each monitoring means can carry out simultaneously, can guarantee monitoring knot
Fruit is efficiently and accurately.Therefore, the present invention can be realized the comprehensive of the different types of electrical safety of electric loop different location
Efficiently monitoring.
Current harmonics and residual current harmonic wave are carried out phase line fault electric arc and fault to ground Electric arc monitoring by the present invention.This hair
It is because China largely has energy-saving and frequency-variable low and middle-grade or even inferior at this stage using intermittent harmonic current as emphasis in bright
Electrical equipment, harmonic current are released to device housings and protection ground wire, it is surplus to form stable continuous larger current harmonic wave and harmonic wave
Aftercurrent.Judgement of harmonic current and harmonic wave residual current the meeting direct interference of these continuous-stables to fault electric arc, but failure
Electric arc has intermittent temporal aspect, as criterion, greatly improves the practicability of fault electric arc detection.It is humorous in document of the present invention
Wave electric current is also referred to as current harmonics, and harmonic wave residual current is also referred to as residual current harmonic wave；
Detailed description of the invention
Fig. 1 is the flow chart of electrical safety monitoring and pre-alarming method provided by the invention；
Fig. 2 is the flow chart of step S2；
Fig. 3 is the schematic diagram of electrical safety monitoring warning device provided by the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1:
A kind of electrical safety monitoring and pre-alarming method is present embodiments provided, refering to Figure 1, electrical safety monitoring is pre-
Alarm method the following steps are included:
Step S1: the first monitoring parameters of electric loop are obtained；
Step S2: by first monitoring parameters compared with given threshold, according to comparison result early warning electrical safety hidden danger.
Wherein, as core improvement of the present invention, first monitoring parameters of the invention include: remaining active power and
Load power or/and resistive residual current or/and insulation conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage
Harmonic power；That is the selection of the first monitoring parameters is remaining active power, load power, resistive residual current, insulation conductance, remains
The combination of aftercurrent fundamental wave, intermittent electric leakage harmonic current and intermittent electric leakage harmonic power, specific combination can basis
Electric loop situation with monitoring determines, does not do excessive concrete restriction here.In the present patent application, the residual current also at
For electric leakage.
When needing to illustrate, the effect of the effect of each first monitoring parameters is as follows, each first monitoring parameters is it
The foundation of combined application under specific application environment.
Wherein, the remaining active power is as judging whether electrical safety hidden danger occurs the monitoring on electric wiring and join
Number, the load power is as judging whether electrical safety hidden danger occurs the monitoring parameters in electrical equipment；It is described resistive surplus
Aftercurrent is as residual current class electric disaster hidden-trouble monitoring parameters；The insulation conductance is monitored as electric insulation hidden danger joins
Number；The intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power are as fault electric arc monitoring parameters；It will be described
First monitoring parameters are compared with given threshold, according to comparison result early warning electrical safety hidden danger.
Harmonic wave of the present invention is intermittent, refers to and detects circuit phase line current harmonic wave numerical value or residual current harmonic wave numerical value
It is replied more than corresponding harmonic data thresholds situation in grade time second and is lower than threshold value, and second grade occurs more than threshold value, recurrent situation,
Intermittent mark is arranged in early warning logic module in a program；
Electrical safety monitoring and pre-alarming method provided in this embodiment can be can be realized electrically by the remaining active power
Electrical safety hidden danger monitoring on route realizes that the electrical safety hidden danger in electrical equipment monitors by the load power, into
And can be realized the monitoring of the electric wiring of electric loop, electrical safety hidden danger in electrical equipment, realize electric loop
Monitoring.
At the same time it can also realize caused electrical safety hidden danger monitoring of insulating by insulation conductance, realize event by electric leakage
Hinder electrical safety perils detecting caused by electric arc, and then realize the detection for realizing different types of electrical safety, ensure that prison
The generalization of survey；And wrong report caused by the perceptual residual current for avoiding electrical safety is realized by resistive residual current, monitoring
Position is comprehensive, monitoring type is comprehensive, monitoring effect accuracy is good, and each monitoring means can carry out simultaneously, can guarantee monitoring knot
Fruit is efficiently and accurately.Therefore, the present invention can be realized the comprehensive of the different types of electrical safety of electric loop different location
Efficiently monitoring.
Certainly, when specific embodiment, the residual current class electric disaster hidden-trouble monitoring parameters can also include
Residual current.It, can be effective using residual current and resistive residual current as residual current class electric disaster hidden-trouble monitoring parameters
It avoids this normal parameter bring of perceptual residual current from reporting by mistake, guarantees the accuracy of measurement.
In addition, the electric insulation hidden danger monitoring parameters further include insulation resistance when specific embodiment.It will insulation
As electric insulation hidden danger monitoring parameters, insulation resistance greater magnitude has the advantages that be easier to show for resistance and insulation conductance,
The small magnitude of coordinated insulation conductance, highly sensitive advantage ensure that the convenience, accuracy and validity of insulating monitoring.
It should be noted that the acquisition of the first monitoring parameters is based on using the acquisition collected electric loop of senser element
Relevant parameter, the relevant parameter of electric loop includes but is not limited to the global voltage of electric loop, overall current, whole remaining
Electric current, firewire electric current and neutral line current etc..So the preferred embodiment as the present embodiment, the collected acquisition is electrical to be returned
Before first monitoring parameters on road further include: acquire the voltage and current or voltage of electric loop, electric current and residual current or
Firewire electric current and neutral line current.
It illustrates, in order to realize that being based on acquisition parameter obtains the first monitoring parameters, each acquisition parameter needs for arrow
Parameter is measured, generalling use voltage transformer, current transformer, these can be collected with the instrument of acquisition phase signal.This implementation
Example can select to use multiple mutual inductors, be separately positioned on electric loop when specific embodiment according to application scenarios
Different location, and voltage transformer, current transformer, remaining electricity can be demarcated as according to position and effect respectively
Current transformer etc..
In addition, the first monitoring parameters, which are calculated, by each acquisition parameter belongs to common sense, simply it is described below herein:
It is assumed that the voltage of electric loopIt is collected using voltage transformer, the electric current of electric loopUsing electric current
Mutual inductor collects, the residual current of electric loopIt is collected using residual current transformer；Wherein, electric loop
Voltage and electric loop electric current between phase difference be φ, then load active powerLoad without
Function powerRemaining active powerResistive residual current
Insulation resistanceInsulation conductance
And the intermittent electric leakage harmonic current is obtained according to the harmonic of residual current.The harmonic of residual current
It can be by obtaining its harmonic using Fourier expansion series to residual current, it can also be by the fundamental wave that detects
Voltage FUx, fundamental current FIx, full wave voltage Ux, full-wave electric current Ix are calculated, the present embodiment preferred the latter, specifically,
Harmonic voltageHarmonic currentAnd then obtain harmonic voltage HUx and harmonic current HIx.
Further, it please refers to shown in Fig. 2, it is described by first monitoring parameters and given threshold ratio in step S2
Compared with specifically including according to comparison result early warning electrical safety hidden danger:
Step S21: first monitoring parameters integrate seclected time, obtain first integral monitoring parameters and freeze
Surplus storage；
Step S22: by the first integral monitoring parameters compared with given threshold, when first product on the period
Divide monitoring parameters to be greater than given threshold, define the period as abnormal time section and carries out early warning.
Wherein, first monitoring parameters integrate seclected time in step S21, may be implemented process transient state
Amount is converted into process cumulant, overcomes the too small and inconvenient defect and deficiency for realizing early warning and monitoring of process transient volume.
In addition, in step S21 by first monitoring parameters to seclected time integrate in seclected time can be with
Hour, day, week, moon etc. be unit, in the present embodiment, preferably as unit of day, if monitor specific to some day be it is different
The normal period is then further processed and carries out early warning；Otherwise without processing, in the case where guaranteeing early warning accuracy, reduce
Data processing amount.
Wherein, it is specifically included specifically, carrying out early warning to abnormal time section described in step S22:
Step S221: refining the first integral monitoring parameters of abnormal time section according to time span, obtains
The subproduct of each time subsegment divides monitoring parameters；Here to according to time span carry out refinement by the way of refining step by step, can
First to use 2 to divide equally, it was divided into two half a day for one day, divides equally in use 3 or 6 divide equally, obtain time subsegment every two hours
Or horal time subsegment and the corresponding subproduct of per time subsegment divide monitoring parameters.Or when directly selecting refinement
Between unit then directly obtain the corresponding subproduct point monitoring ginseng of each refinement time quantum for example, per half an hour, each hour etc.
Number.
Step S222: judged according to each time subsegment and the corresponding subproduct point monitoring parameters of each time subsegment
Timing node, the intensity of anomaly of each time subsegment and anomalous variation trend thrin or a combination thereof where abnormal.
It is thin by being carried out to the first integral monitoring parameters to abnormal time section according to time span in above procedure
The processing of change can effectively identify the section in the specific time that electrical hidden danger occurs.
When specific embodiment, it can also divide monitoring parameters corresponding threshold value ratio the subproduct for obtaining each time subsegment
Compared with the abnormal hidden danger severity of each sub- period is measured in monitoring.
Furthermore divides monitoring parameters by the subproduct of each sub- period, can know the development trend of electrical hidden danger.
When specific embodiment, by residual current fundamental wave, resistive residual current, insulation conductance, remaining wattful power
For rate, it is specifically described as follows to early warning is carried out to abnormal time section described in step S22:
By each period residual current fundamental wave integral parameter, resistive residual current integral parameter, insulation conductance integral parameter,
Remaining active energy is compared with corresponding preset threshold respectively, identifies electrical hidden danger and its generation according to comparison result judgement
Time.Specifically, first presetting day threshold value comparison from the larger period and accordingly, judges whether there is exception and integral parameter is big
Small embodied hidden danger degree；The integral of each smaller each period of the next stage in the larger period with hidden danger is joined again
Several preset threshold value comparisons corresponding with each sub- period, judge it is abnormal where hidden danger that specifically period and integral parameter are embodied
Degree, successively gradually the sub- period and hidden danger degree for specifically judging that electrical hidden danger occurs are realized in refinement analysis, meanwhile, it is available
The hidden danger change procedure of line embodies hidden danger development trend along the time axis.
Embodiment 2:
A kind of electrical safety monitoring warning device is present embodiments provided, is please referred to shown in Fig. 3, the electrical safety monitoring
Prior-warning device includes obtaining module 1 and processing module 2.
Wherein, the first monitoring parameters that module 1 is used to obtain electric loop are obtained；Processing module 2 connects the acquisition mould
Block 1, for by first monitoring parameters compared with given threshold, and according to comparison result early warning electrical safety hidden danger.
First monitoring parameters include: remaining active power and load power or/and resistive residual current or/and absolutely
Edge conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power；That is the selection of the first monitoring parameters is remaining
Active power, load power, resistive residual current, insulation conductance, intermittent electric leakage harmonic current and intermittent electric leakage harmonic wave function
The combination of rate, specific combination can be determined according to the electric loop situation with monitoring, not do excessive concrete restriction here.
When needing to illustrate, the effect of the effect of each first monitoring parameters is as follows, each first monitoring parameters is it
The foundation of combined application under specific application environment.
Wherein, the remaining active power is as judging whether electrical safety hidden danger occurs the monitoring on electric wiring and join
Number, the load power is as judging whether electrical safety hidden danger occurs the monitoring parameters in electrical equipment；It is described resistive surplus
Aftercurrent is as residual current class electric disaster hidden-trouble monitoring parameters；The insulation conductance is monitored as electric insulation hidden danger joins
Number；The intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power are as fault electric arc monitoring parameters.
When specific embodiment, the acquisition module 1 and processing module 2 are desirably integrated into a specific chip, at this
It in embodiment, selects application scenarios for intelligent electric meter, then the acquisition module 1 of the present embodiment and processing module 2 is integrated into intelligence
In the electric quantity metering chip RN8302 of ammeter.
First monitoring parameters be based on acquisition parameter, so, it is described electrical as the optimal technical scheme of the present embodiment
Safety monitoring prior-warning device also needs to be arranged acquisition module 3, and the acquisition module 3 is arranged on electric loop, for acquiring electricity
The voltage and current or voltage of air circuit, electric current and residual current or firewire electric current and neutral line current, and the acquisition module 3
Output end connect it is described obtain module 1 input terminal.
In the application scenarios of intelligent electric meter, acquisition module 3 may include voltage transformer pt, firewire Current Transmit
With residual current mutual inductance CTs, when connection, voltage transformer pt is connected to Ua, Uc couple of electric quantity metering chip RN8302
Pin is answered, firewire Current Transmit is connected to Ia and corresponds to pin, and residual current mutual inductance CTs is connected to Ic and corresponds to pin, obtains
Then voltage U, electric current I and residual current Is further obtain their fundamental wave Uf, If, Isf by metering chip RN8302
With harmonic components Ux, Ix, Isx and load active-power P, reactive power Q, remaining active-power P s, resistive residual current Ir,
Insulation impedance Rs and insulation conductance etc..
In this process, the processing module 2 specifically includes:
Integral Processing submodule 21 connects the output end for obtaining module 1, is used for first monitoring parameters to choosing
It fixes time and is integrated, obtain first integral monitoring parameters and freeze to store；
Comparative sub-module 22 connects the output end of the Integral Processing submodule 21, for monitoring the first integral
Parameter obtains abnormal time section compared with given threshold；
Early warning handles submodule 23, the output end of the Comparative sub-module 22 is connected, for the abnormal time section
The first integral monitoring parameters are handled, and realize the early warning of electrical safety hidden danger.
Further, which can also include communication module, for sending early warning information
To specific device, which includes but is not limited to client or pre-alarm display device etc..
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate
In hardware embodiment, the division between functional module/unit referred in the above description is not necessarily corresponded to
In the division of physical assemblies；If for example, a physical assemblies can have multiple functions or a function or step can be by
Dry physical assemblies cooperation executes.Certain physical assemblies or all physical assemblies may be implemented as hardware, or be implemented as collecting
At circuit, such as specific integrated circuit.
Preferred embodiments of the present invention have been described above with reference to the accompanying drawings, not thereby limiting the scope of the invention.This
Field technical staff without departing from the scope and spirit of the invention in made by any modifications, equivalent replacements, and improvements, should all this
Within the interest field of invention.
Claims (10)
1. a kind of electrical safety monitoring and pre-alarming method, it is characterised in that: the electrical safety monitoring and pre-alarming method includes following step
It is rapid:
Obtain the first monitoring parameters of electric loop；
First monitoring parameters include: electric leakage active power or/and load power or/and resistive residual current or/and absolutely
Edge conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power or/and intermittent Load harmonic electric current and
Intermittent Load harmonic power；
Wherein, the electric leakage active power, which is used as, judges whether electric loop occurs electric insulation class hidden danger or residual current class electricity
The monitoring parameters of gas fire hazard, the load power is as judging whether electric loop occurs the monitoring of overcurrent or short-circuit hidden danger
Parameter；
The resistive residual current is as residual current class electric disaster hidden-trouble monitoring parameters；
The insulation conductance is as electric insulation hidden danger monitoring parameters；
The monitoring parameters of the intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power as fault to ground electric arc；
The intermittent Load harmonic electric current and the intermittent Load harmonic power are as to the line not between isopen or phase zero
The monitoring parameters of serial type fault electric arc on line fault electric arc, same root phase line or zero curve；
By first monitoring parameters compared with given threshold, according to comparison result monitoring and warning comprising including electric disaster hidden-trouble
Electrical safety hidden danger.
2. electrical safety monitoring and pre-alarming method according to claim 1, it is characterised in that: the residual current class is electrically fiery
Calamity hidden danger monitoring parameters further include residual current fundamental wave.
3. electrical safety monitoring and pre-alarming method according to claim 1, it is characterised in that: the electric insulation hidden danger monitoring
Parameter further includes insulation resistance.
4. the electrical safety monitoring and pre-alarming method described in any one of according to claim 1, it is characterised in that: the acquisition electricity
Before first monitoring parameters of air circuit further include:
The voltage and current or voltage, electric current and residual current or firewire electric current and neutral line current of acquisition electric loop, in which:
The voltage is as over-voltage, under-voltage monitoring parameters；
The electric current is as overcurrent, the monitoring parameters of short circuit；
The vector difference of the firewire electric current and neutral line current is also used as residual current class electric disaster hidden-trouble monitoring parameters.
5. electrical safety monitoring and pre-alarming method according to claim 1, it is characterised in that: the intermittent electric leakage harmonic wave electricity
Stream is obtained according to the harmonic of residual current；The intermittent Load harmonic electric current is obtained according to the harmonic of load current
It arrives.
6. electrical safety monitoring and pre-alarming method according to claim 1-5, it is characterised in that: supervised described first
Parameter is surveyed compared with given threshold, according to comparison result early warning electrical safety hidden danger, is specifically included:
First monitoring parameters integrate multi-section time span, the first integral for obtaining multi-section time span monitors ginseng
Number, and every section of time span is divided into multiple periods and is integrated, obtain the first product of each period in every section of time span
Divide monitoring parameters；
By the first integral monitoring parameters of each period compared with given threshold, when the first integral monitoring on the period
Parameter is greater than given threshold, and defining the period is abnormal time section, and carries out early warning to the abnormal time section.
7. electrical safety monitoring and pre-alarming method according to claim 6, it is characterised in that: described to be carried out to abnormal time section
Early warning specifically includes:
When the first integral monitoring parameters of one of them period in multiple periods are relative to given threshold mutation, then mutation pair
The period answered is as abnormal time section, wherein being mutated corresponding time segment boundary is abnormal time section boundary, abnormal time
The first integral monitoring parameters of segment boundary surrounding time section are freezed and are stored；
Multiple time subsegments are refined as according to time span to the first integral monitoring parameters of abnormal time section further to be accumulated
Point, the subproduct for obtaining each time subsegment in abnormal time section divides monitoring parameters, corresponding according to each time subsegment and each time subsegment
Subproduct divide monitoring parameters judgement abnormal where timing node, the intensity of anomaly of each time subsegment and anomalous variation trend three it
One or a combination thereof.
8. a kind of electrical safety monitoring warning device, it is characterised in that: the electrical safety monitoring warning device includes:
Module is obtained, for obtaining the first monitoring parameters of electric loop；
First monitoring parameters include: electric leakage active power or/and load power or/and resistive residual current or/and absolutely
Edge conductance or/and intermittent electric leakage harmonic current and intermittent electric leakage harmonic power or/and intermittent Load harmonic electric current and
Intermittent Load harmonic power；
Wherein, the electric leakage active power, which is used as, judges whether electric loop occurs electric insulation class hidden danger or residual current class electricity
The monitoring parameters of gas fire hazard, the load power is as judging whether electric loop occurs the monitoring of overcurrent or short-circuit hidden danger
Parameter；
The resistive residual current is as residual current class electric disaster hidden-trouble monitoring parameters；
The insulation conductance is as electric insulation hidden danger monitoring parameters；
The monitoring parameters of the intermittent electric leakage harmonic current and the intermittent electric leakage harmonic power as fault to ground electric arc；
The intermittent Load harmonic electric current and the intermittent Load harmonic power are as to the line not between isopen or phase zero
The monitoring parameters of serial type fault electric arc on line fault electric arc, same root phase line or zero curve；
Processing module connects the acquisition module, for by first monitoring parameters compared with given threshold, and according to comparing
As a result early warning electrical safety hidden danger.
9. electrical safety monitoring warning device according to claim 8, it is characterised in that: the electrical safety monitoring and warning
Device further include:
Acquisition module, the acquisition module is arranged on electric loop, for acquiring the voltage and current or electricity of electric loop
Pressure, electric current and residual current or firewire electric current and neutral line current.
10. electrical safety monitoring warning device according to claim 8, it is characterised in that: the processing module is specifically wrapped
It includes:
Integral Processing submodule connects the output end for obtaining module, is used for first monitoring parameters to seclected time
It is integrated, obtain first integral monitoring parameters and freezes to store；
Comparative sub-module connects the output end of the Integral Processing submodule, for by the first integral monitoring parameters with set
Determine threshold value comparison, and obtains abnormal time section；
Early warning handles submodule, the output end of the Comparative sub-module is connected, for described first to the abnormal time section
Integral monitoring parameters are handled, and realize the early warning of electrical safety hidden danger.
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