CN100403040C - Lightning stroke test source with composite fiber overhead earth wire - Google Patents
Lightning stroke test source with composite fiber overhead earth wire Download PDFInfo
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- CN100403040C CN100403040C CNB2005101059111A CN200510105911A CN100403040C CN 100403040 C CN100403040 C CN 100403040C CN B2005101059111 A CNB2005101059111 A CN B2005101059111A CN 200510105911 A CN200510105911 A CN 200510105911A CN 100403040 C CN100403040 C CN 100403040C
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Abstract
The present invention discloses a lightning stroke test source for composite fiber overhead earth wires, which relates to the technical field of communication of power systems. The present invention adopts a proposal of continuous 'C' current, and the circuit of the present invention comprises a thyristor voltage regulating circuit, a main transformer, a voltage level change-over switch, a diode rectification circuit, a filter inductor, a filter capacitor, a synchro power supply, a control circuit, a current limiting change-over switch, a program setting unit, etc. The voltage regulation mode of the present invention adopts silicon-controlled thyristor primary side voltage regulation and secondary rectification, and the lightning stroke test period is controlled through blocking and unblocking; the synchro power supply is used for isolating a three-phase power supply of a main circuit, and is led to a control circuit to form a pulse after the voltage is lowered; the timed guard of the AC side is controlled within 4s. The present invention has the advantages of compact test proposal, simple current loop and time control circuit and low requirement of ignition loop, and the device investment in instruments and meters can be saved.
Description
Technical field
The present invention relates to the communication of power system technical field, especially a kind of electric power special optical cable Optical Fiber composite overhead Ground Wire (OPGW) lightning test source.
Background technology
The various advantages of the existing optical fiber communication of Optical Fiber composite overhead Ground Wire (OPGW) play the ground wire effect again in transmission line of electricity.In electric power optical cable, Optical Fiber composite overhead Ground Wire (OPGW) is with its advanced manufacturing technology, higher dependability and users to trust extremely.
The aerial earth wire that is installed in overhead transmission line top can be used as the lightning conducter guardwire and avoids the thunderbolt damage, so it is subject to thunderbolt.The situation that the aerial earth wire that is struck by lightning may generating unit divides rupture of strands, this just needs to improve the lightning withstand level of aerial earth wire, so that improve the reliability of transmission system.And Optical Fiber composite overhead Ground Wire (OPGW) not only has the function of ground wire, and have both the function of optical communication, therefore its reliability seems more and more important, must investigate the lightning withstand level of OPGW by anti-lightning test, promptly thunderstorm day in year many areas adopt by the high OPGW of anti-lightning test rank.
Though Optical Fiber composite overhead Ground Wire (OPGW) has plurality of advantages,, use experience deficiency after all.In recent years, the thunderstruck accident of operating OPGW occurs now and then, after the outer damage multiply, optical fiber in the inner layer steel pipe also may damage, the final transmission that threatens light signal, even cause communicating interrupt, therefore, the research of the anti-thunderbolt performance of Optical Fiber composite overhead Ground Wire (OPGW) also is subjected to extensive attention day by day.
OPGW lightning test source should be as much as possible near the electric current that thunder and lightning took place and the electric charge transfer case of occurring in nature reality, and simulate the execution that actual thunder and lightning acts on optical cable.Can investigate the anti-thunderbolt performance of OPGW by simulation test.
The development in lightning test source is main according to following ultimate principle:
1, thunder-strike current
At the Optical Fiber composite overhead Ground Wire in the hyperbaric environment (OPGW), proposed the nature lightning waveform and constituted among the IEC60794-4-1 standard appendix F by four parts.Referring to shown in Figure 1, this four part comprises:
(1) initial impact electric current: be called " A " electric current.The discharge first time of initial impact simulation thunder and lightning.Its rise time is less than 25 μ s, and the duration of pulse is less than 500 μ s, and peak value is 120kA ± 10%.
(2) intermediate current: be called " B " electric current.This is a waveform that is exponential damping, and its current average is 2kA, and pulse length is less than 5ms.Transfer charge is 10C.
(3) continuous current: be called " C " electric current.Longer duration, the current amplitude of continuous current are low.The user determines the size of amplitude, duration and the transfer charge amount of continuous current.In most of the cases, the user will be appointed as 50～500ms the duration, and current amplitude is set at 100A～1kA, and transfer charge is set at 20～200 coulombs.
(4) dash current again: be called " D " electric current.Impact is that the secondary of simulating thunder and lightning is launch aed surprise attack again.Its peak value is 100kA ± 10%, and the duration is less than 500 μ s.
Can draw such conclusion by many tests of being carried out before summing up: although the described lightning waveform of IEC60794-4-1 standard is more complete, but under laboratory condition, can not simulate this waveform, when carrying out the laboratory simulation test, unnecessary " A " and " D " part electric current that adopts IEC60794-4-1 appendix F prescribed by standard.Research is thought: in four magnitudes of current, have only the damage maximum of C part electric current to optical cable, therefore, when carrying out testing laboratory's test, the C part also is most important parameter, and playing a decisive role in process of the test is the transfer charge amount.In test, should pay close attention to the amount of " C " part current transfer electric charge.On the contrary, " B " part electric current of utmost point short time does not play much effects to cable fault, can only be used to trigger electric arc in test.Incipient stage in the negative polarity test can be used " B " part electric current, to guarantee rapid triggering electric arc.Yet, regrettably: when electrode is positive polarity, the stability of " B " part electric current meeting interference arc.Find by a large amount of contrast tests, in the time can not utilizing complete thunderbolt wave source that optical cable is tested, only utilize " C " part electric current just can guarantee the correctness of each test result.
2, the scheme in OPGW lightning test source
Under the prerequisite that satisfies the transfer charge regulation, in order to reduce to carry out the difficulty of lightning test as far as possible, different researchists have adopted diverse ways.The viewpoint of comprehensive each side roughly has following several:
First kind of scheme: the all-wave shape of adopting " ABCD " electric current.Just comprise: initial impact (" A "); Intermediate current (" B "); Continuous current (" C "); Impact again (" D ").
The commercial value of this scheme is little, only can be used as the reference of research work.
Second kind of scheme: adopt " B " electric current+" C " electric current.Just comprise: intermediate current (" B ") and continuous current (" C ").
" B " electric current+" C " current scheme is a relatively more compromise scheme, and it has avoided the above big electric current of hundreds of kilo-ampere of impacting first of beginning and end place and secondary pulse, has kept the percussive action of " B " electric current to optical cable again.
The third scheme: adopt " C " electric current.Just only comprise: continuous current (" C ").
It is the unusual electric current (voltage) of short ignition circuit of persistent current and duration that sparking electrode is added to electric current on the optical cable, usually in the microsecond level.
The 4th kind of scheme: adopt " A " electric current+" C " electric current in short-term.Just comprise: initial impact (" A ") and continuous current (" C ").
This scheme can make full use of existing impulse current generator equipment and test, and the simulation thunder and lightning impacts and the influence of impacting once more optical cable first to greatest extent.
The 5th kind of scheme: " B " electric current when adopting length.
When adopting this scheme, the electric current of output is a direct current square wave.Voltage height, the electric current that this testing program is used is big, the time is long, thus very expensive as the transformer and the rectifier of power supply, increased the cost of test.
Before 2003, because testing equipment, domesticly can't carry out the anti-lightning impulse simulation test of qualified OPGW, when home products need be done this test, usually sample can only be delivered to abroad, the test fee of payment great number is finished this project test by external testing laboratory.
Electric power science and technology through State Power Information Center is looked into newly, domestic and international Relational database and relevant website have been carried out online information retrieval, and the up-to-date relevant periodical of the collection of State Power Information Center carried out manual information retrieval, draw by comparative analysis, external general implementation is to adopt the impacting with high pressure source big electric current that adds high pressure, or the impacting with high pressure source adds low-voltage, high-current, at home and abroad do not appear in the newspapers in the OPGW lightning test source with characteristics of the present invention.The invention in Optical Fiber composite overhead Ground Wire (OPGW) lightning test source has solved the problems referred to above, has filled up domestic blank.
Summary of the invention
At the problem that exists in the middle of the prior art, the present invention proposes the scheme in a kind of Optical Fiber composite overhead Ground Wire (OPGW) lightning test source, adopted the third above-mentioned scheme, it is the scheme of continuous current " C " electric current, and above-mentioned problems have been carried out improving with perfect, to meet the requirement of simulating lightning test fully.
Technical scheme of the present invention is: a kind of Optical Fiber composite overhead Ground Wire (OPGW) lightning test source, without the impacting with high pressure source, only adopt the little current system of low pressure to realize the thunderbolt wave source, continuous current " C " electric current is adopted in its lightning test source, and circuit is formed and comprised: thyristor voltage regulation circuit, main-transformer, electric pressure switch, diode rectifier circuit, filter inductance and filter capacitor, synchro source, control circuit, current limliting switch and program selector etc.Main circuit is made up of six mutually compound half-wave rectifying circuits, and main-transformer is connected to resistance capaciting absorpting circuit and thyristor commutation resistance capaciting absorpting circuit.After circuit is connected AC power, earlier through main-transformer, pass through diode rectifier circuit, mu balanced circuit, filtering circuit and current-limiting circuit then, control the time of test and the current value of output through control circuit and program selector again, thereby guarantee that the current transfer quantity of electric charge conforms to the requirement of standard.
This programme only adopts the conventional electrical components and parts to realize " C " electric current thunderbolt wave source.Voltage regulating mode adopts silicon controlled crystal brake pipe former limit pressure regulation, secondary side's rectification, and discharge (thunderbolt experiment) time is controlled by blocking deblock, and its time control curve is a square wave.
Lightning test power requirement equipment 0～2500ms discharge time, the thunderbolt experimental period is controlled by blocking deblock.
Optical Fiber composite overhead Ground Wire (OPGW) lightning test source is applied in the OPGW lightning test system, for the anti-lightning test of OPGW provides simulation thunderbolt " C " current segment continuous current source, makes test reach the discharge charge amount of regulation.The electric part of it and control section and measure portion construction system has just been formed OPGW " C " electric current lightning test system in conjunction with mechanical part and opticator again, the performance of OPGW and the optical characteristics of optical fiber when bearing the regulation lightning impulse in order to evaluation OPGW.
Owing to adopted above-mentioned technical scheme, the invention has the advantages that: testing program is more succinct, is in particular in that current return is simple, the time control loop is simple, to the equipment investment low, that can save instrument and meter in large quantities that requires of ignition circuit.
This device except that the electric current that satisfies the world or country or industry correlation standard, quantity of electric charge index, can be in 0～2500ms setting-up time flexibly, thereby set the charge transfer quantity of experiment flexibly.The measurement dynamic range is big, and maximum can reach 1000 coulombs, not only satisfies thunderbolt experimental requirements now, also can satisfy the thunderbolt requirement of experiment of harsher from now on thunderbolt environment to OPGW or conventional ground wire.
Description of drawings
Fig. 1 is the OPGW lightning test current diagram of IEC60794 standard code.
Fig. 2-the 1st, the block diagram of system in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.Fig. 2-the 2nd, the electrical schematic diagram in lightning test source.
Fig. 3 is the 200C test thunderbolt continuous current oscillogram in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Fig. 4 is the 150C test thunderbolt continuous current oscillogram in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Fig. 5 is the 100C test thunderbolt continuous current oscillogram in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Fig. 6 is the 50C test thunderbolt continuous current oscillogram in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Fig. 7 is 100C test arc voltage (115V) oscillogram in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Fig. 8 is the time control operation curve figure in a kind of Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source.
Embodiment
Referring to accompanying drawing 2-1 and Fig. 2-2:
Main circuit of the present invention is made up of six mutually compound half-wave rectifying circuits, and main-transformer is connected to the capacitance-resistance absorption and thyristor commutation capacitance-resistance absorbs.After circuit is connected AC power, earlier through main-transformer, pass through diode rectifier circuit, mu balanced circuit, filtering circuit and current-limiting circuit then, control the time of test and the current value of output through control circuit and program selector again, thereby guarantee that the current transfer quantity of electric charge conforms to the requirement of standard.
Wherein:
Air switch: be used for three-phase inlet wire and outer inlet wire buffer action, but convenient for maintaining;
Insurance (fuse): the main devices (as controllable silicon, commutation diode etc.) in the protection equipment;
Synchro source: be used to isolate the main circuit three-phase supply, guide to control circuit board through step-down and be used for pulse shaping;
Contactor: be used for three-phase inlet wire and rear section main circuit buffer action, can play double protection;
Thyristor (controllable silicon) pressure regulation: control the silicon controlled conduction angle by control circuit and time, reach the purpose of former limit pressure regulation (alternating voltage);
Main-transformer: play the effect that exchanges inlet wire, electromagnetic isolation, voltage transformation;
The electric pressure switch: consider the ripple requirement, VD desirable value (DC800V, DC700V, the DC600V) primary that do not coexist is established three taps, changes secondary voltage by the switch transition primary turns;
Diode rectifier circuit: the direct current that the transformer secondary output ac voltage rectifier is become 300Hz;
Filter inductance circuit and filter-capacitor circuit: the ripple factor of voltage after the reduction rectification;
The alternating current sample circuit: be used for when the discharge process control circuit breaks down situations such as (as pulse blocking) bad or accidental short circuits, the control entire equipment was shut down after 4 seconds.
The important technological parameters in Optical Fiber composite overhead Ground Wire of the present invention (OPGW) lightning test source is as follows:
1) equipment input three-phase and four-line 380V, 50Hz allow ± 10% to change;
2) output dc voltage (during zero load is third gear: 800V, 700V, 600V, reaches this purpose by changing the primary tap), 600V and 700V switch with plug-in strip.Start waveform 90ms with interior finish and DC voltage adjustable, D.C. capacity is no more than 550V * 400A (arc voltage is no more than 200V) after the 90ms;
3) the DC current cut-off current divides fourth gear: 100A, 200A, 300A, 400A;
4) (ripple factor of 0.1s～2.5s) is not more than 5% in discharge during work;
5) delay protection of AC side is controlled in the 4s;
6) the service time 0.1s～2.5s of control product brake tube is adjustable, and free show (unit millisecond);
7) direct supply and switch sections are equipped with the protection of various switching overvoltages;
8) main transformer capacity is pressed the 200KVA design;
9) noise of entire equipment is not more than 75dB (testing from 1 meter of cabinet with A level noise machine) around distance cabinet middle part;
10) the equipment protection grade is IP20;
11) cabinet dimensions: 1400 * 1000 * 2200 (wide * dark * height) (comprise kitchen 60).
Wherein, the continuous current test result sees Table 1.
Table 1 continuous current test result
| The test rank | Continuous current | Duration | The transfer |
| |
400A | 572ms | |
| 200 | |||
| 150C | |||
| 300A | 572ms | 152.1As | |
| |
200A | 560ms | 103.2As |
| |
100A | 604ms | 47.73As |
The continuous current oscillogram is seen Fig. 3-Fig. 6, and the arc voltage waveform is seen Fig. 7.
First curve is the operation control end, gets the rising edge of experiment button when pressing constantly at a1, after (as long as stop button is not pressed) be high level.Second curve is the curve of output of pulse blocking control end, a1 test constantly the rising edge of button when pressing begin the time-delay that control circuit board carries out the t1 time period (adjusting) for the current potential of Voltage loop and electric current loop the t2 time period to before keep high level to come locking pulse always; T2 is low level the working time (being the deblock time) during this period of time, and t2 transfers high level locking pulse equipment no-output to after finishing.Printed circuit board (PCB) (or system) is adjusted time t1 (0～2000ms can set, and suggestion is set at 1200ms), working time t2 (0～2500ms can set).
Claims (4)
1. lightning stroke test source with composite fiber overhead earth wire, it is characterized in that: continuous current " C " electric current is adopted in the lightning test source, adopt the little current system of low pressure to realize the thunderbolt wave source, its circuit is formed and is comprised: thyristor voltage regulation circuit, main-transformer, electric pressure switch, diode rectifier circuit, filter inductance and filter capacitor, synchro source, control circuit, current limliting switch, program selector;
Main circuit is made up of six mutually compound half-wave rectifying circuits, and main-transformer is connected to resistance capaciting absorpting circuit and thyristor commutation resistance capaciting absorpting circuit; After circuit is connected AC power, earlier through main-transformer, pass through diode rectifier circuit, mu balanced circuit, filtering circuit and current-limiting circuit then, control the time of test and the current value of output through control circuit and program selector again, thereby guarantee that the current transfer quantity of electric charge conforms to the requirement of standard;
Its voltage regulating mode adopts silicon controlled crystal brake pipe former limit pressure regulation, secondary side's rectification; The thunderbolt experiment is controlled by blocking deblock discharge time; Its time control curve is a square wave;
Synchro source: be used to isolate the main circuit three-phase supply, guide to control circuit through step-down and be used to form pulse;
Electric pressure switch: for adapting to the requirement of ripple, establish some taps, change secondary voltage by the switch transition primary turns in primary;
Main-transformer: play the effect that exchanges inlet wire, electromagnetic isolation, voltage transformation;
Diode rectifier circuit: the transformer secondary output ac voltage rectifier is become direct current;
Filter inductance circuit and filter-capacitor circuit: the ripple factor of voltage after the reduction rectification;
2. a kind of lightning stroke test source with composite fiber overhead earth wire according to claim 1 is characterized in that: by changing the primary tap, make that output dc voltage is third gear: 800V, 700V, 600V when unloaded; Wherein 600V and 700V switch with plug-in strip;
Start waveform 90ms with interior finish and DC voltage adjustable, D.C. capacity is no more than 550V * 400A after the 90ms; Arc voltage is no more than 200V;
The DC current cut-off current divides fourth gear: 100A, 200A, 300A, 400A;
0.1s the ripple factor during～2.5s discharge work is not more than 5%;
The delay protection of AC side was controlled in 4 seconds; The alternating current sample circuit is used for when the discharge process control circuit breaks down, and the control entire equipment was shut down after 4 seconds;
Service time 0.1s～the 2.5s of control thyristor is adjustable, and to have with the millisecond be the time showing of unit;
Direct supply and switch sections are equipped with the protection of various switching overvoltages.
3. a kind of lightning stroke test source with composite fiber overhead earth wire according to claim 1 and 2, it is characterized in that: the time operation curve of control is: first curve is the operation control end, get " experiment " rising edge when button is pressed constantly at a1, after this empirical curve is a high level, after pressing " stopping " button, curve becomes low level;
Second curve is the curve of output of pulse blocking control end, test the rising edge of button when pressing constantly at a1 and begin the time-delay that control circuit board carries out the t1 time period, t1 is the adjustment time of printed circuit board (PCB) or system, for the current potential of Voltage loop and electric current loop adjusts, the t2 time period to before keep high level to come locking pulse always, described adjustment time t1 sets between 0 ~ 2000ms; T2 is the working time, and promptly the deblock time is low level during this period of time, and t2 transfers high level locking pulse equipment no-output to after finishing, and described working time t2 sets between 0 ~ 2500ms.
4. a kind of lightning stroke test source with composite fiber overhead earth wire according to claim 3 is characterized in that: described adjustment time t1 is set at 1200ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101059111A CN100403040C (en) | 2005-10-08 | 2005-10-08 | Lightning stroke test source with composite fiber overhead earth wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101059111A CN100403040C (en) | 2005-10-08 | 2005-10-08 | Lightning stroke test source with composite fiber overhead earth wire |
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| Publication Number | Publication Date |
|---|---|
| CN1847864A CN1847864A (en) | 2006-10-18 |
| CN100403040C true CN100403040C (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101059111A Expired - Fee Related CN100403040C (en) | 2005-10-08 | 2005-10-08 | Lightning stroke test source with composite fiber overhead earth wire |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771490A (en) * | 2016-12-22 | 2017-05-31 | 上海欧秒电力监测设备有限公司 | A kind of OPGW terminal monitorings system |
| CN107271866B (en) * | 2017-06-23 | 2020-03-17 | 西安交通大学 | Test device and method for direct effect of quadruple continuous time sequence lightning stroke |
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|---|---|---|---|---|
| US3845374A (en) * | 1972-08-18 | 1974-10-29 | B & C Ind Inc | Circuitry for converting ac power to regulated dc power |
| US4021721A (en) * | 1974-07-15 | 1977-05-03 | Hitachi, Ltd. | AC-to-DC converter |
| CN2217815Y (en) * | 1994-10-12 | 1996-01-17 | 覃和君 | Special dc. voltage-stablizing device for thyristor |
| CN2306612Y (en) * | 1997-03-31 | 1999-02-03 | 章祖文 | Large-power regulated DC power supply |
| CN2407384Y (en) * | 2000-01-13 | 2000-11-22 | 章祖文 | Large power D. C. voltage and current stabilizing sources |
| CN2454797Y (en) * | 2000-12-26 | 2001-10-17 | 章祖文 | Light Dc. voltage regulated and current-stabilized power supply |
-
2005
- 2005-10-08 CN CNB2005101059111A patent/CN100403040C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3845374A (en) * | 1972-08-18 | 1974-10-29 | B & C Ind Inc | Circuitry for converting ac power to regulated dc power |
| US4021721A (en) * | 1974-07-15 | 1977-05-03 | Hitachi, Ltd. | AC-to-DC converter |
| CN2217815Y (en) * | 1994-10-12 | 1996-01-17 | 覃和君 | Special dc. voltage-stablizing device for thyristor |
| CN2306612Y (en) * | 1997-03-31 | 1999-02-03 | 章祖文 | Large-power regulated DC power supply |
| CN2407384Y (en) * | 2000-01-13 | 2000-11-22 | 章祖文 | Large power D. C. voltage and current stabilizing sources |
| CN2454797Y (en) * | 2000-12-26 | 2001-10-17 | 章祖文 | Light Dc. voltage regulated and current-stabilized power supply |
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| CN1847864A (en) | 2006-10-18 |
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