CN105319451A - Running state detecting method and apparatus of zinc oxide arrester - Google Patents

Abstract

The present invention discloses a running state detecting method and apparatus of a zinc oxide arrester. The detecting method includes the steps as follows: acquiring detecting data of the zinc oxide arrester, wherein, the detecting data is the running state of the zinc oxide arrester; calculating out an electromagnetic interference coefficient of the zinc oxide arrester according to the detecting data; and confirming whether the running state of the zinc oxide arrester is abnormal or not by judging whether the electromagnetic interference coefficient is less than a preset value or not. According to the invention, the problem of inaccurate detection for the running state of the zinc oxide arrester is solved, and the detection accuracy for the running state of the zinc oxide is improved.

Description

The detection method of Zinc oxide lightning arrester operation state and device

Technical field

The present invention relates to lightning arrester field, in particular to a kind of detection method and device of Zinc oxide lightning arrester operation state.

Background technology

Lightning arrester is the important proterctive equipment of safe operation of power system, is mainly used in limiting the lightning surge in electric system and switching overvoltage.The normal lightning arrester used is broadly divided at present: common valve type, magnetic blow-out valve type and Zinc-Oxide Arrester.In recent years, Zinc-Oxide Arrester effective with its over-voltage, do not exist power frequency continued flow, flow capacity greatly, the advantage such as well non-linear, volume is little, lightweight, structure simple, long service life obtains and widely uses in electric system.

The accident of Zinc-Oxide Arrester and the defect overwhelming majority cause with watered and wetting by valve block is aging.What valve block was aging is a slow change procedure, and watered and wetting then may cause Zinc-Oxide Arrester rapid degradation.Due to zinc oxide valve plate without series gap, inner insulation distance is relatively short and flashover voltage is lower, bring moisture in its poorly sealed or manufacture process and will cause lightning arrester rapid degradation, even may cause Explosion of on Arrester, and then cause large-area power-cuts.In addition, Zinc-Oxide Arrester operating condition is stable, failure rate is lower, and under scheduled overhaul pattern, and it is more that the accompanying of interruption maintenance stops equipment, has a strong impact on power supply reliability.Therefore, understand the running status of Zinc-Oxide Arrester in time, most important to the power supply reliability of electric system.

At present, the condition monitoring of Zinc-Oxide Arrester judges according to test figure primarily of the professional person being rich in operating experience, owing to lacking detailed criterion, cause the condition monitoring of Zinc-Oxide Arrester inaccurate, judged result has higher subjectivity and uncertainty.

For in prior art to the inaccurate problem of the condition monitoring of Zinc-Oxide Arrester, at present effective solution is not yet proposed.

Summary of the invention

Fundamental purpose of the present invention is the detection method and the device that provide a kind of Zinc oxide lightning arrester operation state, to solve the inaccurate problem of the condition monitoring of Zinc-Oxide Arrester.

To achieve these goals, according to an aspect of the present invention, a kind of detection method of Zinc oxide lightning arrester operation state is provided.Detection method according to the present invention comprises: the detection data obtaining Zinc-Oxide Arrester, and described detection data are the service data of described Zinc-Oxide Arrester; The electromagnetic interference (EMI) coefficient of described Zinc-Oxide Arrester is calculated according to described detection data; And by judging whether described electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of described Zinc-Oxide Arrester exists exception.

Further, described detection data comprise A, B, C three-phase current in resistance property peak value and the total leakage current peak value of A, B, C three-phase of described Zinc-Oxide Arrester, described electromagnetic interference (EMI) coefficient comprises A, B, C three-phase electromagnetic interference coefficient, wherein, the electromagnetic interference (EMI) coefficient calculating described Zinc-Oxide Arrester according to described detection data comprises: obtain described electromagnetic interference (EMI) coefficient by following formulae discovery

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}},D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}},D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}$

Wherein, D _a, D _b, D _crepresent A, B, C three-phase electromagnetic interference coefficient respectively, IrpA, IrpB, IrpC are A, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively, and IpA, IpB, IpC are the total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

Further, by judging whether described electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of described Zinc-Oxide Arrester exists abnormal comprising: judge whether described electromagnetic interference (EMI) coefficient is less than preset value; And if judge that described electromagnetic interference (EMI) coefficient is less than described preset value, then determine that the running status of described Zinc-Oxide Arrester exists abnormal.

Further, by judging whether described electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of described Zinc-Oxide Arrester exists abnormal comprising: judge whether described electromagnetic interference (EMI) coefficient is less than preset value; If judge that described electromagnetic interference (EMI) coefficient is not less than described preset value, then judge whether described detection data meet preset standard, described preset standard is the standard of service data under the described Zinc-Oxide Arrester normal operating condition preset; If judge that described detection data do not meet described preset standard, then determine that the running status of described Zinc-Oxide Arrester exists abnormal; And if judge that described detection data meet described preset standard, then determine that the running status of described Zinc-Oxide Arrester does not exist exception.

Further, after judging that described detection data meet described preset standard, described detection method also comprises: the running status coefficient calculating described Zinc-Oxide Arrester based on described detection data, and described running status coefficient is the parameter for reflecting described Zinc oxide lightning arrester operation state; Judge whether described running status coefficient is in abnormal ranges; And if judge that described running status coefficient is in abnormal ranges, then determine that the running status of described Zinc-Oxide Arrester exists abnormal.

To achieve these goals, according to a further aspect in the invention, a kind of pick-up unit of Zinc oxide lightning arrester operation state is provided.Pick-up unit according to the present invention comprises: acquiring unit, and for obtaining the detection data of Zinc-Oxide Arrester, described detection data are the service data of described Zinc-Oxide Arrester; First computing unit, for calculating the electromagnetic interference (EMI) coefficient of described Zinc-Oxide Arrester according to described detection data; And first determining unit, for by judging whether described electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of described Zinc-Oxide Arrester exists exception.

Further, described detection data comprise A, B, C three-phase current in resistance property peak value and the total leakage current peak value of A, B, C three-phase of described Zinc-Oxide Arrester, described electromagnetic interference (EMI) coefficient comprises A, B, C three-phase electromagnetic interference coefficient, wherein, described first computing unit comprises: computing module, for obtaining described electromagnetic interference (EMI) coefficient by following formulae discovery

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}},D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}},D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}$

Wherein, D _a, D _b, D _crepresent A, B, C three-phase electromagnetic interference coefficient respectively, IrpA, IrpB, IrpC are A, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively, and IpA, IpB, IpC are the total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

Further, described first determining unit comprises: the first judge module, for judging whether described electromagnetic interference (EMI) coefficient is less than preset value; And first determination module, for when judging that described electromagnetic interference (EMI) coefficient is less than described preset value, determine that the running status of described Zinc-Oxide Arrester exists abnormal.

Further, described first determining unit comprises: the second judge module, for judging whether described electromagnetic interference (EMI) coefficient is less than preset value; 3rd judge module, for when judging that described electromagnetic interference (EMI) coefficient is not less than described preset value, judge whether described detection data meet preset standard, described preset standard is the standard of service data under the described Zinc-Oxide Arrester normal operating condition preset; Second determination module, for when judging that described detection data do not meet described preset standard, determines that the running status of described Zinc-Oxide Arrester exists abnormal; And the 3rd determination module, for when judging that described detection data meet described preset standard, determine that the running status of described Zinc-Oxide Arrester does not exist exception.

Further, described pick-up unit also comprises: the second computing unit, for after judging that described detection data meet described preset standard, calculate the running status coefficient of described Zinc-Oxide Arrester based on described detection data, described running status coefficient is the parameter for reflecting described Zinc oxide lightning arrester operation state; Judging unit, for judging whether described running status coefficient is in abnormal ranges; And second determining unit, for when judging that described running status coefficient is in abnormal ranges, determine that the running status of described Zinc-Oxide Arrester exists abnormal.

According to the present invention, by obtaining the detection data of Zinc-Oxide Arrester, detecting data is the service data of Zinc-Oxide Arrester; According to the electromagnetic interference (EMI) coefficient detecting data calculating Zinc-Oxide Arrester; And by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists exception, solve the inaccurate problem of the condition monitoring of Zinc-Oxide Arrester, reach the effect improved the accuracy of the condition monitoring of Zinc-Oxide Arrester.

Accompanying drawing explanation

The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the process flow diagram of the detection method of Zinc oxide lightning arrester operation state according to the embodiment of the present invention;

Fig. 2 is the process flow diagram of the detection method according to the preferred Zinc oxide lightning arrester operation state of the embodiment of the present invention;

Fig. 3 is the schematic diagram of the pick-up unit of Zinc oxide lightning arrester operation state according to the embodiment of the present invention.

Embodiment

It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.

The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.

It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.

Embodiments provide a kind of detection method of Zinc oxide lightning arrester operation state.

Fig. 1 is the process flow diagram of the detection method of Zinc oxide lightning arrester operation state according to the embodiment of the present invention.As shown in Figure 1, to comprise step as follows for this detection method:

Step S102, obtains the detection data of Zinc-Oxide Arrester.These detection data are the service data of Zinc-Oxide Arrester.

Step S104, according to the electromagnetic interference (EMI) coefficient detecting data calculating Zinc-Oxide Arrester.

Step S106, by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists exception.

When detection data can be for testing Zinc-Oxide Arrester, simulate the service data that its working environment records, such as, the parameters such as electric current, voltage, power.Obtain and detect data in order to detect the running status of Zinc-Oxide Arrester.

After getting detection data, calculate electromagnetic interference (EMI) coefficient according to detection data.This electromagnetic interference (EMI) coefficient for judging that Zinc-Oxide Arrester operationally, the electromagnetic field situation in residing space.Calculate electromagnetic interference (EMI) coefficient, by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether Zinc-Oxide Arrester exists exception, so that detect the running status of Zinc-Oxide Arrester from the angle of external electromagnetic field.

According to the embodiment of the present invention, by obtaining the detection data of Zinc-Oxide Arrester, detecting data is the service data of Zinc-Oxide Arrester; According to the electromagnetic interference (EMI) coefficient detecting data calculating Zinc-Oxide Arrester; And by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists exception, solve the inaccurate problem of the condition monitoring of Zinc-Oxide Arrester, reach the effect improved the accuracy of the condition monitoring of Zinc-Oxide Arrester.

Preferably, detect A, B, C three-phase current in resistance property peak value and the total leakage current peak value of A, B, C three-phase that data comprise Zinc-Oxide Arrester, electromagnetic interference (EMI) coefficient comprises A, B, C three-phase electromagnetic interference coefficient, wherein, comprise according to the electromagnetic interference (EMI) coefficient detecting data calculating Zinc-Oxide Arrester: obtain electromagnetic interference (EMI) coefficient by following formulae discovery

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}},D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}},D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}$

Wherein, D _a, D _b, D _crepresent A, B, C three-phase electromagnetic interference coefficient respectively, IrpA, IrpB, IrpC are A, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively, and IpA, IpB, IpC are the total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

Particularly, the condition monitoring result of Zinc-Oxide Arrester is inevitably subject to the impact of working voltage, temperature, relative humidity and external electromagnetic field (especially interphase interference).Wherein, working voltage, temperature, relative humidity all can in-site measurements, but external electromagnetic field is not easily measured.According to on-site experience for many years, make tentatively to judge external electromagnetic field situation with the following method, definition electromagnetic interference (EMI) coefficient D _a, D _b, D _c, calculated by following formula and obtain:

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}}---\left(1\right)$

$D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}}---\left(2\right)$

$D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}---\left(3\right)$

In formula, Irp _a, Irp _b, Irp _ca, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively; Ip _a, Ip _b, Ip _cthe total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

For Zinc-Oxide Arrester, just can think that the running status of Zinc-Oxide Arrester is normal because current in resistance property and total leakage current must meet certain condition, therefore, the electromagnetic interference (EMI) coefficient calculated by formula (1), (2) and (3) also must meet certain condition, by its span precalculated, when detecting, judgement can be carried out based on the value set to electromagnetic interference (EMI) coefficient to detect, thus whether detection Zinc-Oxide Arrester exists exception objectively, improves the accuracy of the condition monitoring of Zinc-Oxide Arrester.

Preferably, by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists abnormal comprising: judge whether electromagnetic interference (EMI) coefficient is less than preset value; And if judge that electromagnetic interference (EMI) coefficient is less than preset value, then determine that the running status of Zinc-Oxide Arrester exists abnormal.

The condition that preset value will be able to meet according to electromagnetic interference (EMI) coefficient precalculates and draws, after calculating electromagnetic interference (EMI) coefficient, between this preset value and electromagnetic interference (EMI) coefficient are compared, judge whether electromagnetic interference (EMI) coefficient is less than this preset value, if judge that electromagnetic interference (EMI) coefficient is less than preset value, then determine that the running status of Zinc-Oxide Arrester exists abnormal, namely determine Zinc-Oxide Arrester existing defects, need to list interruption maintenance plan in.

Particularly, by the requirement of " current in resistance property can not exceed 25% of total leakage current ", electromagnetic interference (EMI) coefficient can not be less than 75.5 ° (i.e. preset values).Otherwise, be judged as that spatial electromagnetic interference is excessive.

Certainly, to this kind of situation, because single data can not determine Zinc-Oxide Arrester existing defects, can the test period be shortened, another day again test, and this lightning arrester be included in lightning arrester concern storehouse.If test of many times is all in analog result, then can conservatively by qualitative for this group lightning arrester be defect, list interruption maintenance plan in.

Preferably, by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists abnormal comprising: judge whether electromagnetic interference (EMI) coefficient is less than preset value; If judge that electromagnetic interference (EMI) coefficient is not less than preset value, then judge whether meet preset standard, preset standard is the standard of service data under the Zinc-Oxide Arrester normal operating condition preset if detecting data; If judge that detecting data does not meet preset standard, then determine that the running status of Zinc-Oxide Arrester exists abnormal; And if judge that detecting data meets preset standard, then determine that the running status of Zinc-Oxide Arrester does not exist exception.

When detecting Zinc-Oxide Arrester, when determining that electromagnetic interference (EMI) coefficient is not less than preset value, judge whether detect data meets preset standard.Particularly, according to circuit ultimate principle: for a certain resistance, its resistance value R, active-power P, the electric current I flowing through this resistance meet P=I ²r.Therefore, the test resistance R of Zinc-Oxide Arrester calculates by its meritorious power consumption P1 and total leakage current effective value I0:

$R=\frac{P_1}{I_0^2}---\left(4\right)$

Definition Zinc-Oxide Arrester test resistance ratio S1 and Zinc-Oxide Arrester alternate current in resistance property ratio S2, shown in (5) and (6):

$S_1=\frac{\max (R_A,R_B,R_C)-\min (R_A,R_B,R_C)}{\min (R_A,R_B,R_C)}---\left(5\right)$

$S_2=\frac{\max (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})-\min (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})}{\min (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})}---\left(6\right)$

In formula, RA, RB, RC are respectively Zinc-Oxide Arrester A, B, C three-phase test resistance, Irp _a, Irp _b, Irp _cbe respectively Zinc-Oxide Arrester A, B, C three-phase current in resistance property peak value.

Consider same interval in transformer station (transformer, bus) or same transmission line of electricity, the three-phase zinc oxide lightning arrester of cable line all should be identical and must meet GB (i.e. preset standard) in model, production batch, processing technology etc., therefore, three-phase test resistance and current in resistance property peak value difference should not differ more than one times.If S1 >=100% or S2 >=100%, then tentatively can assert that this group detects data unreasonable, namely the running status of Zinc-Oxide Arrester exists abnormal.Certainly, its reason may be that test method is incorrect, field wiring is insecure, test bit is copied and got mistake etc.To this kind of situation, because single data can not determine Zinc-Oxide Arrester existing defects, can the test period be shortened, another day again test, and this lightning arrester be included in lightning arrester concern storehouse.If test of many times is all in analog result, then by qualitative for this group lightning arrester be defect, list interruption maintenance plan in, thus improve further the accuracy detected.

Preferably, after judging that detecting data meets preset standard, detection method also comprises: based on the running status coefficient detecting data calculating Zinc-Oxide Arrester, running status coefficient is the parameter for reflecting Zinc oxide lightning arrester operation state; Judge whether running status coefficient is in abnormal ranges; And if judge that running status coefficient is in abnormal ranges, then determine that the running status of Zinc-Oxide Arrester exists abnormal.

When judging that detecting data meets preset standard, can also detect the running status of Zinc-Oxide Arrester further, calculate its running status coefficient, judge whether this running status coefficient is in abnormal ranges.Particularly, specify: according to GB11032-2000 " alternating current gapless metal oxide arrester " under working voltage, the measured value of current in resistance property is compared with initial value, and have during significant change and should strengthen monitoring, when current in resistance property doubles, should have a power failure inspection.Definition Zinc oxide lightning arrester operation state evaluation coefficient K:

$K=\max (\frac{I_{\mathrm{rpA}}-I_{\mathrm{rpA}}^{\′}}{I_{\mathrm{rpA}}^{\′}},\frac{I_{\mathrm{rpB}}-I_{\mathrm{rpB}}^{\′}}{I_{\mathrm{rpC}}^{\′}},\frac{I_{\mathrm{rpC}}-I_{\mathrm{rpC}}^{\′}}{I_{\mathrm{rpC}}^{\′}})---\left(7\right)$

In formula, Irp _a, Irp _b, Irp _cbe respectively the arrester resistance current peak value of this test, I ' _rpA, I ' _rpB, I ' _rpCbe respectively the current in resistance property peak value initial value in the test figure initial value storehouse of this lightning arrester.

Criterion one:

ε ₁≤K≤ε ₂(8)

In formula, ε ₁=50%, ε ₂=100%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is greater than threshold value ε ₁and be less than threshold value ε ₂time, judge that the running status of this lightning arrester is as abnormal, ALM, and this group data are included in lightning arrester concern storehouse, remind staff " to shorten the test period, again test ".

Criterion two:

K≥ε ₃(9)

In formula, ε ₃=100%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is greater than threshold value ε ₃time and preset range, judge that the running status of this lightning arrester is defect, answer interruption maintenance.

Criterion three:

K≤ε ₄(10)

In formula, ε ₄=50%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is less than threshold value ε ₄time, judge that the running status of this lightning arrester is normal, include this group test figure in test figure initial value storehouse.

Fig. 2 is the process flow diagram of the detection method according to the preferred Zinc oxide lightning arrester operation state of the embodiment of the present invention.As shown in Figure 2, this detection method comprises the following steps:

Step S201, obtains the detection data of Zinc-Oxide Arrester.

Step S202, judges whether to there is larger space electromagnetic interference (EMI).Can judge by calculating electromagnetic interference (EMI) coefficient.If so, and be single judgement, then perform step S202; If so, and for repeatedly to judge, then step S203 is performed; If not, then step S204 is performed.

Step S203, shortens the test period and again tests.

Step S204, interruption maintenance.

Whether reasonable step S205, judge to detect data, namely judges whether detect data meets preset standard.If not and be single judge, then perform step S202; If not, and for repeatedly to judge, then step S203 is performed; If so, then step S206 is performed.

Step S206, to Zinc-Oxide Arrester state estimation.

Step S207, if the running status of Zinc-Oxide Arrester meets criterion one, then performs step S210.

Step S208, if the running status of Zinc-Oxide Arrester meets criterion two, then performs step S211.

Step S209, if the running status of Zinc-Oxide Arrester meets criterion three, then performs step S212.

Step S210, outputting alarm.

Step S211, interruption maintenance.

Step S212, determines that Zinc-Oxide Arrester is qualified.

Data are included in Zinc-Oxide Arrester and are paid close attention to storehouse by step S213.

Data are included in and are detected initial value data storehouse by step S213.

The embodiment of the present invention additionally provides a kind of pick-up unit of Zinc oxide lightning arrester operation state.This device can realize its function by computer equipment.It should be noted that, the pick-up unit of the Zinc oxide lightning arrester operation state of the embodiment of the present invention may be used for the detection method performing the Zinc oxide lightning arrester operation state that the embodiment of the present invention provides, and the pick-up unit of the Zinc oxide lightning arrester operation state that the detection method of the Zinc oxide lightning arrester operation state of the embodiment of the present invention also can be provided by the embodiment of the present invention performs.

Fig. 3 is the schematic diagram of the pick-up unit of Zinc oxide lightning arrester operation state according to the embodiment of the present invention.As shown in Figure 3, the pick-up unit of this Zinc oxide lightning arrester operation state comprises: acquiring unit 10, first computing unit 20 and the first determining unit 30.

Acquiring unit 10 is for obtaining the detection data of Zinc-Oxide Arrester, and detecting data is the service data of Zinc-Oxide Arrester.

First computing unit 20 is for calculating the electromagnetic interference (EMI) coefficient of Zinc-Oxide Arrester according to detection data.

First determining unit 30 is for by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists exception.

When detection data can be for testing Zinc-Oxide Arrester, simulate the service data that its working environment records, such as, the parameters such as electric current, voltage, power.Obtain and detect data in order to detect the running status of Zinc-Oxide Arrester.

After getting detection data, calculate electromagnetic interference (EMI) coefficient according to detection data.This electromagnetic interference (EMI) coefficient for judging that Zinc-Oxide Arrester operationally, the electromagnetic field situation in residing space.Calculate electromagnetic interference (EMI) coefficient, by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether Zinc-Oxide Arrester exists exception, so that detect the running status of Zinc-Oxide Arrester from the angle of external electromagnetic field.

According to the embodiment of the present invention, by obtaining the detection data of Zinc-Oxide Arrester, detecting data is the service data of Zinc-Oxide Arrester; According to the electromagnetic interference (EMI) coefficient detecting data calculating Zinc-Oxide Arrester; And by judging whether electromagnetic interference (EMI) coefficient is less than preset value and determines whether the running status of Zinc-Oxide Arrester exists exception, solve the inaccurate problem of the condition monitoring of Zinc-Oxide Arrester, reach the effect improved the accuracy of the condition monitoring of Zinc-Oxide Arrester.

Preferably, detect A, B, C three-phase current in resistance property peak value and the total leakage current peak value of A, B, C three-phase that data comprise Zinc-Oxide Arrester, electromagnetic interference (EMI) coefficient comprises A, B, C three-phase electromagnetic interference coefficient, wherein, first computing unit comprises: computing module, for obtaining electromagnetic interference (EMI) coefficient by following formulae discovery:

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}},D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}},D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}$

Wherein, D _a, D _b, D _crepresent A, B, C three-phase electromagnetic interference coefficient respectively, IrpA, IrpB, IrpC are A, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively, and IpA, IpB, IpC are the total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

Particularly, the condition monitoring result of Zinc-Oxide Arrester is inevitably subject to the impact of working voltage, temperature, relative humidity and external electromagnetic field (especially interphase interference).Wherein, working voltage, temperature, relative humidity all can in-site measurements, but external electromagnetic field is not easily measured.According to on-site experience for many years, make tentatively to judge external electromagnetic field situation with the following method, definition electromagnetic interference (EMI) coefficient D _a, D _b, D _c, calculated by following formula and obtain:

$D_A=\arccos \frac{I_{\mathrm{rpA}}}{I_{\mathrm{pA}}}---\left(1\right)$

$D_B=\arccos \frac{I_{\mathrm{rpB}}}{I_{\mathrm{pB}}}---\left(2\right)$

$D_C=\arccos \frac{I_{\mathrm{rpC}}}{I_{\mathrm{pC}}}---\left(3\right)$

In formula, Irp _a, Irp _b, Irp _ca, B, C three-phase current in resistance property peak value of Zinc-Oxide Arrester respectively; Ip _a, Ip _b, Ip _cthe total leakage current peak value of Zinc-Oxide Arrester A, B, C three-phase respectively.

For Zinc-Oxide Arrester, just can think that the running status of Zinc-Oxide Arrester is normal because current in resistance property and total leakage current must meet certain condition, therefore, the electromagnetic interference (EMI) coefficient calculated by formula (1), (2) and (3) also must meet certain condition, by its span precalculated, when detecting, judgement can be carried out based on the value set to electromagnetic interference (EMI) coefficient to detect, thus whether detection Zinc-Oxide Arrester exists exception objectively, improves the accuracy of the condition monitoring of Zinc-Oxide Arrester.

Preferably, the first determining unit comprises: the first judge module, for judging whether electromagnetic interference (EMI) coefficient is less than preset value; And first determination module, for when judging that electromagnetic interference (EMI) coefficient is less than preset value, determine that the running status of Zinc-Oxide Arrester exists abnormal.

The condition that preset value will be able to meet according to electromagnetic interference (EMI) coefficient precalculates and draws, after calculating electromagnetic interference (EMI) coefficient, between this preset value and electromagnetic interference (EMI) coefficient are compared, judge whether electromagnetic interference (EMI) coefficient is less than this preset value, if judge that electromagnetic interference (EMI) coefficient is less than preset value, then determine that the running status of Zinc-Oxide Arrester exists abnormal, namely determine Zinc-Oxide Arrester existing defects, need to list interruption maintenance plan in.

Particularly, by the requirement of " current in resistance property can not exceed 25% of total leakage current ", electromagnetic interference (EMI) coefficient can not be less than 75.5 ° (i.e. preset values).Otherwise, be judged as that spatial electromagnetic interference is excessive.

Certainly, to this kind of situation, because single data can not determine Zinc-Oxide Arrester existing defects, can the test period be shortened, another day again test, and this lightning arrester be included in lightning arrester concern storehouse.If test of many times is all in analog result, then can conservatively by qualitative for this group lightning arrester be defect, list interruption maintenance plan in.

Preferably, the first determining unit comprises: the second judge module, for judging whether electromagnetic interference (EMI) coefficient is less than preset value; And the 3rd judge module, for when judging that electromagnetic interference (EMI) coefficient is not less than preset value, judge whether meet preset standard, preset standard is the standard of service data under the Zinc-Oxide Arrester normal operating condition preset if detecting data; Second determination module, for when judging that detecting data does not meet preset standard, determines that the running status of Zinc-Oxide Arrester exists abnormal; And the 3rd determination module, for when judging that detecting data meets preset standard, determine that the running status of Zinc-Oxide Arrester does not exist exception.

When detecting Zinc-Oxide Arrester, when determining that electromagnetic interference (EMI) coefficient is not less than preset value, judge whether detect data meets preset standard.Particularly, according to circuit ultimate principle: for a certain resistance, its resistance value R, active-power P, the electric current I flowing through this resistance meet P=I ²r.Therefore, the test resistance R of Zinc-Oxide Arrester calculates by its meritorious power consumption P1 and total leakage current effective value I0:

$R=\frac{P_1}{I_0^2}---\left(4\right)$

Definition Zinc-Oxide Arrester test resistance ratio S1 and Zinc-Oxide Arrester alternate current in resistance property ratio S2, shown in (5) and (6):

$S_1=\frac{\max (R_A,R_B,R_C)-\min (R_A,R_B,R_C)}{\min (R_A,R_B,R_C)}---\left(5\right)$

$S_2=\frac{\max (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})-\min (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})}{\min (I_{\mathrm{rpA}},I_{\mathrm{rpB}},I_{\mathrm{rpC}})}---\left(6\right)$

In formula, RA, RB, RC are respectively Zinc-Oxide Arrester A, B, C three-phase test resistance, Irp _a, Irp _b, Irp _cbe respectively Zinc-Oxide Arrester A, B, C three-phase current in resistance property peak value.

Consider same interval in transformer station (transformer, bus) or same transmission line of electricity, the three-phase zinc oxide lightning arrester of cable line all should be identical and must meet GB (i.e. preset standard) in model, production batch, processing technology etc., therefore, three-phase test resistance and current in resistance property peak value difference should not differ more than one times.If S1 >=100% or S2 >=100%, then tentatively can assert that this group detects data unreasonable, namely the running status of Zinc-Oxide Arrester exists abnormal.Certainly, its reason may be that test method is incorrect, field wiring is insecure, test bit is copied and got mistake etc.To this kind of situation, because single data can not determine Zinc-Oxide Arrester existing defects, can the test period be shortened, another day again test, and this lightning arrester be included in lightning arrester concern storehouse.If test of many times is all in analog result, then by qualitative for this group lightning arrester be defect, list interruption maintenance plan in, thus improve further the accuracy detected.

Preferably, pick-up unit also comprises: the second computing unit, for after judging that detecting data meets preset standard, based on the running status coefficient detecting data calculating Zinc-Oxide Arrester, running status coefficient is the parameter for reflecting Zinc oxide lightning arrester operation state; Judging unit, for judging whether running status coefficient is in abnormal ranges; And second determining unit, for when judging that running status coefficient is in abnormal ranges, determine that the running status of Zinc-Oxide Arrester exists abnormal.

When judging that detecting data meets preset standard, can also detect the running status of Zinc-Oxide Arrester further, calculate its running status coefficient, judge whether this running status coefficient is in abnormal ranges.Particularly, specify: according to GB11032-2000 " alternating current gapless metal oxide arrester " under working voltage, the measured value of current in resistance property is compared with initial value, and have during significant change and should strengthen monitoring, when current in resistance property doubles, should have a power failure inspection.Definition Zinc oxide lightning arrester operation state evaluation coefficient K:

$K=\max (\frac{I_{\mathrm{rpA}}-I_{\mathrm{rpA}}^{\′}}{I_{\mathrm{rpA}}^{\′}},\frac{I_{\mathrm{rpB}}-I_{\mathrm{rpB}}^{\′}}{I_{\mathrm{rpC}}^{\′}},\frac{I_{\mathrm{rpC}}-I_{\mathrm{rpC}}^{\′}}{I_{\mathrm{rpC}}^{\′}})---\left(7\right)$

In formula, Irp _a, Irp _b, Irp _cbe respectively the arrester resistance current peak value of this test, I ' _rpA, I ' _rpB, I ' _rpCbe respectively the current in resistance property peak value initial value in the test figure initial value storehouse of this lightning arrester.

Criterion one:

ε ₁≤K≤ε ₂(8)

In formula, ε ₁=50%, ε ₂=100%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is greater than threshold value ε ₁and be less than threshold value ε ₂time, judge that the running status of this lightning arrester is as abnormal, ALM, and this group data are included in lightning arrester concern storehouse, remind staff " to shorten the test period, again test ".

Criterion two:

K≥ε ₃(9)

In formula, ε ₃=100%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is greater than threshold value ε ₃time and preset range, judge that the running status of this lightning arrester is defect, answer interruption maintenance.

Criterion three:

K≤ε ₄(10)

In formula, ε ₄=50%.

When Zinc oxide lightning arrester operation state evaluation coefficient K is less than threshold value ε ₄time, judge that the running status of this lightning arrester is normal, include this group test figure in test figure initial value storehouse.

It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.

In several embodiments that the application provides, should be understood that, disclosed device, the mode by other realizes.Such as, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, mobile terminal, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. A detection method of zinc oxide surge arrester operating state, is characterized in that, comprises: Obtaining the detection data of the zinc oxide arrester, the detection data being the operation data of the zinc oxide arrester; Calculate the electromagnetic interference coefficient of the zinc oxide arrester according to the detection data; It is determined whether the operation state of the zinc oxide arrester is abnormal by judging whether the electromagnetic interference coefficient is smaller than a preset value. 2. detection method according to claim 1, is characterized in that, described detection data comprises A, B, C three-phase resistive current peak value and A, B, C three-phase total leakage current peak value of described zinc oxide arrester , the electromagnetic interference coefficient includes A, B, C three-phase electromagnetic interference coefficient, wherein, Calculating the electromagnetic interference coefficient of the zinc oxide arrester according to the detection data includes: calculating the electromagnetic interference coefficient by the following formula ${\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; wxya</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; pA</span>}}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; RB</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; pB</span>}}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; C</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; rpC</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; PC</span>}}}$ Among them, D _A , D _B , DC represent the three-phase electromagnetic interference coefficients of A, B, and _C respectively, I _rpA , I _rpB , and I _rpC are the peak resistive currents of A, B, and C three-phases of the zinc oxide arrester respectively, and I _pA , I _pB , and I _pC are the peak values of the total leakage current of the three phases of zinc oxide arresters A, B, and C, respectively. 3. The detection method according to claim 1, wherein determining whether there is an abnormality in the operating state of the zinc oxide arrester by judging whether the electromagnetic interference coefficient is less than a preset value comprises: judging whether the electromagnetic interference coefficient is less than a preset value; If it is determined that the electromagnetic interference coefficient is smaller than the preset value, it is determined that the operation state of the zinc oxide arrester is abnormal. 4. The detection method according to claim 1, wherein determining whether there is an abnormality in the operating state of the zinc oxide arrester by judging whether the electromagnetic interference coefficient is less than a preset value comprises: judging whether the electromagnetic interference coefficient is less than a preset value; If it is judged that the electromagnetic interference coefficient is not less than the preset value, it is judged whether the detection data meets the preset standard, and the preset standard is the preset operating data of the zinc oxide arrester under the normal operating state. standard; If it is judged that the detection data does not meet the preset standard, it is determined that the operation state of the zinc oxide arrester is abnormal; If it is judged that the detection data meets the preset standard, it is determined that there is no abnormality in the operation state of the zinc oxide arrester. 5. The detection method according to claim 4, wherein, after judging that the detection data meets the preset standard, the detection method further comprises: calculating an operating state coefficient of the zinc oxide arrester based on the detection data, the operating state coefficient being a parameter reflecting the operating state of the zinc oxide arrester; judging whether the operating state coefficient is in an abnormal range; If it is judged that the operating state coefficient is in an abnormal range, it is determined that the operating state of the zinc oxide arrester is abnormal. 6. A detection device for the operating state of a zinc oxide arrester, characterized in that it comprises: An acquisition unit, configured to acquire detection data of the zinc oxide arrester, the detection data being operation data of the zinc oxide arrester; a first calculation unit, configured to calculate the electromagnetic interference coefficient of the zinc oxide arrester according to the detection data; The first determining unit is configured to determine whether the operation state of the zinc oxide arrester is abnormal by judging whether the electromagnetic interference coefficient is smaller than a preset value. 7. The detection device according to claim 6, wherein the detection data includes the A, B, and C three-phase resistive current peak values and the A, B, and C three-phase total leakage current peak values of the zinc oxide arrester , the electromagnetic interference coefficient includes A, B, C three-phase electromagnetic interference coefficient, wherein, The first calculation unit includes: a calculation module, which is used to calculate the electromagnetic interference coefficient through the following formula ${\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; wxya</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; pA</span>}}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; RB</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; pB</span>}}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; D.</span>}}_{\mathrm{<span\; class="notranslate">\; C</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; rpC</span>}}}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; PC</span>}}}$ Among them, D _A , D _B , DC represent the three-phase electromagnetic interference coefficients of A, B, and _C respectively, I _rpA , I _rpB , and I _rpC are the peak resistive currents of A, B, and C three-phases of the zinc oxide arrester respectively, and I _pA , I _pB , and I _pC are the peak values of the total leakage current of the three phases of zinc oxide arresters A, B, and C, respectively. 8. The detection device according to claim 6, wherein the first determining unit comprises: The first judging module is used to judge whether the electromagnetic interference coefficient is smaller than a preset value; The first determination module is configured to determine that the operation state of the zinc oxide arrester is abnormal when it is determined that the electromagnetic interference coefficient is less than the preset value. 9. The detection device according to claim 6, wherein the first determining unit comprises: The second judging module is used to judge whether the electromagnetic interference coefficient is smaller than a preset value; The third judging module is used to judge whether the detection data meets a preset standard when it is judged that the electromagnetic interference coefficient is not less than the preset value, and the preset standard is the zinc oxide arrester set in advance Standards for operating data under normal operating conditions; The second determination module is used to determine that the operation state of the zinc oxide arrester is abnormal when it is determined that the detection data does not meet the preset standard; The third determination module is configured to determine that there is no abnormality in the operation state of the zinc oxide arrester when it is determined that the detection data meets the preset standard. 10. The detection device according to claim 9, wherein the detection device further comprises: The second calculation unit is used to calculate the operation state coefficient of the zinc oxide arrester based on the detection data after judging that the detection data satisfies the preset standard, and the operation state coefficient is used to reflect the oxidation Parameters of the operating state of the zinc arrester; a judging unit, configured to judge whether the operating state coefficient is in an abnormal range; The second determination unit is configured to determine that the operation state of the zinc oxide arrester is abnormal when it is determined that the operation state coefficient is within an abnormal range.