CN1920588A - Device for failure analysis of surge protector lightning protection component - Google Patents
Device for failure analysis of surge protector lightning protection component Download PDFInfo
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- CN1920588A CN1920588A CN 200510036824 CN200510036824A CN1920588A CN 1920588 A CN1920588 A CN 1920588A CN 200510036824 CN200510036824 CN 200510036824 CN 200510036824 A CN200510036824 A CN 200510036824A CN 1920588 A CN1920588 A CN 1920588A
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Abstract
The invention relates to a device for analyzing the failure of anti-thunder device of surge protector, wherein it comprises: a rectifier filter circuit, a DC/DC converter, a DC/AC converter for converting the direct voltage of DC/DC converter into alternative voltage at preset frequency, a current limiter serially connected in the circuit between DC/DC converter and DC/AC converter, a current sampler serially connected in the circuit between DC/DC converter and DC/AC converter for converting the current of surge protector into voltage signal, and a current amplifier for amplifying the sampled current signal, to be sent to the DC/DC converter to keep the current of surge protector. The invention uses advanced closed control technique, to real-time adjust the current of SPD, to reduce the cost and improve the testing accuracy.
Description
Technical field
The present invention relates to a kind of device in shocking preventing technology field, more particularly, relate to the device of the failure analysis of surge protector SPD lightning protection components such as a kind of lightning protection device, voltage dependent resistor (VDR), discharge tube.
Background technology
Thunderbolt is a kind of spontaneous phenomenon; in center 1.5～2KM scope of thunderbolt, all may produce dangerous superpotential and equipment on the damaged line; especially in recent years; along with being the development of the informatization of representative with the network; the application of a large amount of information equipments and tight instrument is increasingly extensive, and a large amount of cmos semiconductor circuit has been used in these high precision equipment inside, and is extremely fragile to the protective capability of superpotential and overcurrent; therefore, extremely important to the protection of thunder and lightning.
At present, the lightning protection major part at device interior adopts SPD to realize that SPD can be used to transient suppression superpotential and bypass surge current.The SPD device is divided into two big classes, and a class is switching mode such as gas-discharge tube; An other class is a votage limit type, suppresses diode etc. as voltage dependent resistor (VDR) and transition.Because SPD exists catabiosis or performance to reduce when using at the scene, when using, normal voltage can cause leakage current to increase, time one is long cause the SPD blast, on fire or under the situation of thunderbolt SPD do not have due effect, so in YD/T1235.1 standard the inside, the requirement of having stipulated the thermal stability of SPD:
1) SPD is by in the following table 1 during each retaining test current grade, all should reach thermal equilibrium or make the action of its tripping device.
2) at duration of test, the surface temperature of SPD should be lower than 120 ℃ all the time, and tripping device moved back 5 minutes in, and the surface temperature of SPD should be lower than 80 ℃.
3) if the power-frequency voltage that SPD applies 2Uc is tackled in the action of SPD tripping device, continue 1 minute, the electric current that should not have above 0.5mArms this moment flows through SPD.
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 |
| Test current grade (mArms) | 5000 | 2500 | 1000 | 320 | 80 | 20 |
Having stipulated the test method of SPD thermal stability in YD/T1235.2, is the heat stabilization test synoptic diagram of YD/T1235.2 regulation as Fig. 1; The output voltage of the power supply in this standard in the key diagram 1 is enough high so that can have 5000,2500,1000,320,80 among the SPD, the 20mArms persistent current flows through, tolerance deviation can not surpass ± 10%.At present, commonly used power supply and test circuit are as shown in Figure 2 during test: the A101 among the figure is a powerful single-phase voltage regulating device, and A102 and A104 are current-limiting resistances, in the middle of the application of reality, current-limiting resistance A102 and A104 can choose one wantonly, also can the both use.A103 is the isolation boosting transformer, will be elevated to enough height from the voltage of pressure regulator, satisfies the needs of test, and A105 detects reometer, is used for detecting the electric current that flows through SPD, and A106 is a gauge tap.This testing apparatus and method of testing, the defective below having aspect several.
1) when the output voltage of the isolating transformer that boosts surpasses the operation voltage of SPD, the electric current that flows through SPD can increase rapidly, electric current is wayward, the output voltage of adjustment pressure regulator that will be frequent, especially when little testing current, the more difficult control of the stability of electric current, test result is inaccurate when causing little electric current.
2) current-limiting resistance A102 or A104 differ big especially when little electric current and high-current test, and it is very high to the power requirement of resistance, when measuring current is 5000mA, the power of current-limiting resistance should be 5KW at least to 10KW, and will dispose the current-limiting resistance of different resistances to the SPD of different operation voltage grades.Therefore difficult test accuracy with the SPD that guarantees different electric pressures.
3) this method of testing and SPD have certain difference under actual conditions, during with this testing of equipment, the virtual voltage that is added in the SPD two ends is along with the increase of electric current reduces, and during practical application, under certain current conditions, the voltage that is added in the SPD two ends is constant basically.
4) this testing apparatus needs powerful pressure regulator and isolation boosting transformer, the equipment heaviness, and operation inconvenience, danger is bigger simultaneously.
Because the defective that above-mentioned testing apparatus exists, simultaneously because the testing apparatus that each producer builds is different, cause the inaccurate of test result, thereby cause each producer's properties of product uneven, in the middle of the application of reality, can not normal separation when SPD often occurring and losing efficacy, cause the generation of serious accidents such as exploding, on fire.
Therefore, there is defective in prior art, and awaits improving and development.
Summary of the invention
The object of the present invention is to provide a kind of device of failure analysis of surge protector lightning protection component; when the stability that overcomes the electric current that existing testing apparatus exists is difficult to control, little electric current test result inaccurate, need shortcomings such as superpower current resistor and equipment heaviness, operation inconvenience; have easy and simple to handle; Current Control accurately, fast; can be used in the test of the SPD of various electric pressures; and volume is little, in light weight; simultaneously its output characteristics is similar substantially to the characteristic of electrical network, with the current characteristics basically identical in the actual operating position of SPD.
Technical scheme of the present invention is as follows:
A kind of device of failure analysis of surge protector lightning protection component wherein, comprising:
One current rectifying and wave filtering circuit is used for electric main rectification, filtering with input, becomes DC voltage;
One DC/DC transducer is used for the DC voltage from described current rectifying and wave filtering circuit is carried out quadratic transformation, converts DC voltage to;
One DC/AC transducer is used for the DC voltage from described DC/DC transducer is carried out conversion, becomes the alternating voltage of preset frequency;
One current-limiting circuit is connected in the loop of DC/DC transducer and DC/AC transducer, is used for flowing through the maximum current limit of surge protector in certain scope;
One current sample is connected in the loop of DC/DC transducer and DC/AC transducer, and is provided with described current-limiting circuit is parallel, and the current conversion that is used for flowing through surge protector becomes voltage signal, gives current amplification circuit;
One current amplification circuit is used for the current signal from described circuit sampling is amplified, and gives described DC/DC transducer, and to adjust the output voltage of described DC/DC transducer, the electric current that surge protector is flow through in assurance is constant.
Described device, wherein, described device also is provided with a step-up transformer, is connected to tested surge protector, is used for the alternating voltage of described DC/AC transducer output is raise, reach the voltage breakdown of fast surge protector.
Described device, wherein, the alternating voltage of described DC/AC transducer output is 50Hz.
Described device, wherein, described civil power is a three-phase, and described current rectifying and wave filtering circuit comprises a three-phase commutation bridge, the output of this three-phase commutation bridge connects electrochemical capacitor and carries out filtering.
Described device, wherein, described DC/DC transducer comprises in sequential series: a PWM controller, one first driving circuit, one bridge converter, a high-frequency transformer is used to boost and electrical isolation, and a rectification filtering unit output voltage is than higher DC voltage.
Described device, wherein, described current amplification circuit is realized with operational amplifier.
Described device, wherein, described DC/AC converter using half-bridge inversion circuit, comprise in sequential series: a SPWM Waveform generating circuit is used to produce the SPWM ripple of two-way complementation, one second driving circuit is used for sending to described half-bridge inversion circuit after electric current amplifies, again through producing the needed alternating voltage of test after the filtering.
The device of a kind of failure analysis of surge protector lightning protection component provided by the present invention; compared with prior art; owing to adopted advanced Closed loop Control; reach the effect that real-time regulated flows through the electric current of SPD, do not needed manually to come the adjusting that do not stop, improved the security in the use of equipment; saved simultaneously the volume and weight of equipment greatly; do not need powerful pressure regulator and step-up transformer, the cost of equipment is reduced greatly, improved the test accuracy of test simultaneously.
Description of drawings
Fig. 1 is the heat stabilization test synoptic diagram of the YD/T1235.2 regulation of prior art;
Fig. 2 is the circuit theory diagrams of the testing apparatus of prior art;
Fig. 3, Fig. 4 are the theory diagrams of each preferred embodiment of the present invention;
Fig. 5 is the realization theory diagram of the rectifying and wave-filtering of an instantiation of the present invention;
Fig. 6 is the realization theory diagram of example DC/DC circuit of the present invention;
Fig. 7 is the realization theory diagram of example DC/AC circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention.
The device of a kind of failure analysis of surge protector lightning protection component of the present invention; main design has been to use the high pressure that exchanges 50HZ that modern control technology and Power Electronic Technique produce a Current Control amplitude; the amplitude of while this voltage of real-time regulated; it is constant to make the electric current that flows through SPD maintain the electric current that sets, and tests the protection feature under the different leakage currents of SPD.
As shown in Figure 3, the device of failure analysis of surge protector lightning protection component of the present invention comprises following components:
One current rectifying and wave filtering circuit A, its effect is that the three-phase alternating current civil power that will import carries out rectification, filtering, becomes DC voltage, is input to the DC/DC circuit of back.
One DC/DC transducer B, its effect is that the DC voltage from described current rectifying and wave filtering circuit is carried out quadratic transformation, convert DC voltage to, be input to the DC/AC circuit D of back, the output voltage of DC/DC transducer B remains unchanged to guarantee the electric current that flows through tested SPD according to the output voltage real-time regulated from current-limiting circuit C (being used for electric current amplifies).
One, this current-limiting circuit is connected in the loop of DC/DC transducer B and DC/AC transducer D, and its effect is to flow through the maximum current limit of SPD in certain scope.
One DC/AC transducer D, its effect is to carry out conversion from the DC voltage of DC/DC transducer B, to become the alternating voltage of 50Hz, to be input to step-up transformer G.
One current sample E is connected in the loop of DC/DC transducer B and DC/AC transducer D, and is provided with described current-limiting circuit C is parallel, and its effect is that the current conversion that will flow through SPD becomes voltage signal, gives current amplification circuit F then, carries out processing and amplifying.
One current amplification circuit F, its effect is that the current signal from current sample E is amplified, and gives DC/DC transducer B then, removes to adjust the output voltage of DC/DC transducer B, the electric current that SPD is flow through in assurance is constant.
One step-up transformer G, its effect is the alternating voltage rising with the 50Hz of DC/AC transducer output, reaches the voltage breakdown of SPD.The output of step-up transformer G is directly connected to tested SPD.If enough height of the output voltage of DC/DC transducer and DC/AC transducer design can reach the voltage breakdown of SPD, so, can remove this G step-up transformer, as shown in Figure 4.
Current rectifying and wave filtering circuit A in the concrete embodiment of the present invention comprises rectification and filter function, civil power input in this example can be adopted the three-phase mains, so rectification circuit can directly adopt three-phase commutation bridge to carry out rectification, the output of rectifier bridge connects electrochemical capacitor and carries out filtering.Circuit theory diagrams as shown in Figure 5.
DC/DC transducer B in the instantiation of the present invention, the realization that is the DC/DC circuit can be adopted full-bridge DC/DC transducer, its realization block diagram is seen shown in Figure 6: the PWM drive signal of PWM controller output is given driving circuit, improve driving force, give a bridge converter then, the output of this bridge converter is given a high-frequency transformer and is boosted and electrical isolation, and the output of this high-frequency transformer becomes the higher DC voltage of voltage ratio through overcommutation with filtering transformation.The output voltage of described DC/DC transducer B is controlled by current signal, keeps stablizing constant in order to guarantee the electric current that flows through tested SPD.
Current-limiting circuit in instantiation of the present invention can adopt the bigger resistance of power ratio, and in order to reduce the volume of testing apparatus, the resistance of resistance can be regulated, and when testing big leakage current, turns the resistance of resistance down, when testing little leakage current, and the resistance of transferring big resistance.Described current sample comes sample rate current with shunt.
Described current amplification circuit can realize that the current signal after the amplification send DC/DC transducer with operational amplifier, controls the output voltage of described DC/DC transducer.
Described DC/AC transducer of the present invention can adopt half-bridge inversion circuit, its realization block diagram is seen shown in Figure 7: the effect of a SPWM Waveform generating circuit is the SPWM ripple that produces the two-way complementation, can adopt DSP to realize, also can adopt other modes such as single-chip microcomputer to realize.The SPWM ripple of output is given half-bridge inversion circuit after overdrive circuit carries out the electric current amplification, again through just producing the needed alternating voltage of test after the filtering.Described DC/AC transducer does not need to carry out the closed-loop control of output voltage.
Said apparatus of the present invention, compared with prior art, owing to adopted advanced Closed loop Control, reach the effect that real-time regulated flows through the electric current of SPD, do not needed manually to come the adjusting that do not stop, improved the security in the use of equipment, saved simultaneously the volume and weight of equipment greatly, do not need powerful pressure regulator and step-up transformer, the cost of equipment is reduced greatly, improved the test accuracy of test simultaneously.
But need to prove; above-mentioned explanation only is the detailed description to preferred embodiment of the present invention; narration only is explanation realizability of the present invention and outstanding effect thereof; concrete feature can not be used as the restriction to technical scheme of the present invention, and protection scope of the present invention should be as the criterion with appended claims of the present invention.
Claims (7)
1, a kind of device of failure analysis of surge protector lightning protection component is characterized in that, comprising:
One current rectifying and wave filtering circuit is used for electric main rectification, filtering with input, becomes DC voltage;
One DC/DC transducer is used for the DC voltage from described current rectifying and wave filtering circuit is carried out quadratic transformation, converts DC voltage to;
One DC/AC transducer is used for the DC voltage from described DC/DC transducer is carried out conversion, becomes the alternating voltage of preset frequency;
One current-limiting circuit is connected in the loop of DC/DC transducer and DC/AC transducer, is used for flowing through the maximum current limit of surge protector in certain scope;
One current sample is connected in the loop of DC/DC transducer and DC/AC transducer, and is provided with described current-limiting circuit is parallel, and the current conversion that is used for flowing through surge protector becomes voltage signal, gives current amplification circuit;
One current amplification circuit is used for the current signal from described circuit sampling is amplified, and gives described DC/DC transducer, and to adjust the output voltage of described DC/DC transducer, the electric current that surge protector is flow through in assurance is constant.
2, device according to claim 1; it is characterized in that described device also is provided with a step-up transformer, be connected to tested surge protector; be used for the alternating voltage of described DC/AC transducer output is raise, reach the voltage breakdown of fast surge protector.
3, device according to claim 1 and 2 is characterized in that, the alternating voltage of described DC/AC transducer output is 50Hz.
4, device according to claim 1 and 2 is characterized in that, described civil power is a three-phase, and described current rectifying and wave filtering circuit comprises a three-phase commutation bridge, and the output of this three-phase commutation bridge connects electrochemical capacitor and carries out filtering.
5, device according to claim 1 and 2, it is characterized in that, described DC/DC transducer comprises in sequential series: a PWM controller, one first driving circuit, one bridge converter, one high-frequency transformer is used to boost and electrical isolation, and a rectification filtering unit output voltage is than higher DC voltage.
6, device according to claim 1 and 2 is characterized in that, described current amplification circuit is realized with operational amplifier.
7, device according to claim 1 and 2, it is characterized in that, described DC/AC converter using half-bridge inversion circuit, comprise in sequential series: a SPWM Waveform generating circuit is used to produce the SPWM ripple of two-way complementation, one second driving circuit is used for sending to described half-bridge inversion circuit after electric current amplifies, again through producing the needed alternating voltage of test after the filtering.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100368245A CN100498360C (en) | 2005-08-25 | 2005-08-25 | Device for failure analysis of surge protector lightning protection component |
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| CNB2005100368245A CN100498360C (en) | 2005-08-25 | 2005-08-25 | Device for failure analysis of surge protector lightning protection component |
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| CN1920588A true CN1920588A (en) | 2007-02-28 |
| CN100498360C CN100498360C (en) | 2009-06-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044483A (en) * | 2015-05-19 | 2015-11-11 | 上海市防雷中心 | Novel SPD on-site detection method |
| CN105676035A (en) * | 2016-03-04 | 2016-06-15 | 北京万云科技开发有限公司 | Surge protection device health monitor |
| CN108777490A (en) * | 2018-08-22 | 2018-11-09 | 桐庐峰云科技有限公司 | With the grid-connected photovoltaic AC voltage regulator of photovoltaic electric active complementary energy |
| CN108828302A (en) * | 2018-07-09 | 2018-11-16 | 安徽诚意电气科技有限公司 | A kind of Surge Protector detection system based on repeated detection |
| CN109239502A (en) * | 2018-11-21 | 2019-01-18 | 珠海德利和电气有限公司 | A kind of Surge Protector test device |
| CN111239572A (en) * | 2020-03-27 | 2020-06-05 | 安徽中普防雷科技有限公司 | On-line monitoring method and system for lightning protection facility SPD |
-
2005
- 2005-08-25 CN CNB2005100368245A patent/CN100498360C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044483A (en) * | 2015-05-19 | 2015-11-11 | 上海市防雷中心 | Novel SPD on-site detection method |
| CN105044483B (en) * | 2015-05-19 | 2018-01-05 | 上海市防雷中心 | A kind of new SPD in-situ check and test methods |
| CN105676035A (en) * | 2016-03-04 | 2016-06-15 | 北京万云科技开发有限公司 | Surge protection device health monitor |
| CN108828302A (en) * | 2018-07-09 | 2018-11-16 | 安徽诚意电气科技有限公司 | A kind of Surge Protector detection system based on repeated detection |
| CN108777490A (en) * | 2018-08-22 | 2018-11-09 | 桐庐峰云科技有限公司 | With the grid-connected photovoltaic AC voltage regulator of photovoltaic electric active complementary energy |
| CN109239502A (en) * | 2018-11-21 | 2019-01-18 | 珠海德利和电气有限公司 | A kind of Surge Protector test device |
| CN109239502B (en) * | 2018-11-21 | 2023-09-08 | 珠海德利和电气有限公司 | Surge protector testing arrangement |
| CN111239572A (en) * | 2020-03-27 | 2020-06-05 | 安徽中普防雷科技有限公司 | On-line monitoring method and system for lightning protection facility SPD |
| CN111239572B (en) * | 2020-03-27 | 2022-08-30 | 安徽中普防雷科技有限公司 | On-line monitoring method and system for lightning protection facility SPD |
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| CN100498360C (en) | 2009-06-10 |
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