CN105842569A - Saturation reactor voltage time area obtaining and insulation testing system and method - Google Patents
Saturation reactor voltage time area obtaining and insulation testing system and method Download PDFInfo
- Publication number
- CN105842569A CN105842569A CN201610390451.XA CN201610390451A CN105842569A CN 105842569 A CN105842569 A CN 105842569A CN 201610390451 A CN201610390451 A CN 201610390451A CN 105842569 A CN105842569 A CN 105842569A
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- voltage
- time
- saturable reactor
- measured
- current waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a saturation reactor voltage time area obtaining and insulation testing system and method. The saturation reactor voltage time area obtaining and insulation testing system includes an impulse voltage generator and an oscilloscope; the impulse voltage generator is connected in series with a saturation reactor to be measured; the voltage probe of the oscilloscope is used for measuring voltage at two ends of the saturation reactor to be measured; the current probe of the oscilloscope is used for measuring current passing through the saturation reactor to be measured; and an appropriate impulse voltage level is selected, and the impulse voltage generator is made to apply voltage for insulation testing, and therefore, insulation testing of the reactor can be realized at the same time. With the system and method adopted, a testomg process is simple and convenient, and the obtaining of a voltage time area and the implementation of the insulation testing can be realized with one-time testing, and therefore, efficiency is very high.
Description
Technical field
The present invention relates to a kind of saturable reactor for converter valve voltage time and area obtain and take into account Insulation Test
System, method.
Background technology
Saturable reactor is the key components of direct-current transmission converter valve, and its Main Function is to limit IGCT
Current changing rate when opening and in converter valve when bearing thunder and lightning, steep wave surge voltage, limit on IGCT
Voltage stress.Safe operation and voltage time and area is the key parameter of saturable reactor, to converter valve
Play pivotal role.
Chinese patent application " a kind of voltage time and area of reactor test dress of publication number CN101718811B
Put and method of testing " use low tension loop test voltage electric current to obtain its voltage time and area, pilot system
Including pressure regulator, testing transformer, oscillograph, test product reactor, for connecting with testing transformer, records ripple
The voltage of instrument record test product reactor and the electric current flow through.
But this mode is only capable of carrying out voltage time and area test, it is impossible to take into account Insulation Test.Test method
Complex, relatively costly.
Summary of the invention
It is an object of the invention to provide saturable reactor voltage time and area to obtain and the system of Insulation Test, side
Method, in order to solve the problem that existing mode can not take into account Insulation Test.
For achieving the above object, the solution of the present invention includes:
Saturable reactor voltage time and area obtains and the system of Insulation Test, including impulse voltage generator and
Oscillograph, described impulse voltage generator is for connecting with saturable reactor to be measured；Described oscillographic voltage
Probe is used for measuring saturable reactor both end voltage to be measured, and current probe flows through saturation reactance to be measured for measurement
The electric current of device.
Further, described current probe is connected between impulse voltage generator and saturable reactor earth point
Line on.
Present invention also offers the test method testing above-mentioned pilot system, comprise the steps:
Impulse voltage generator applies insulation test voltage at saturable reactor two ends to be measured, utilizes oscillograph to remember
Record voltage and current waveform；
Determine time zero and the flex point time T of current waveform, calculate voltage time and areaWherein,
U is voltage；Described time zero is the moment of the last zero crossing of voltage waveform, described flex point time T
Slope mutation time for current waveform.
Further, it is filtered voltage and current waveform processing doing filtering voltage and current waveform
Disturb.
Further, voltage and current waveform being filtered processing method is recurrence average filter method.
The pilot system of the present invention is essentially identical with the pilot system of CN101718811B, differs only in and adopts
Testing transformer is replaced with impulse voltage generator.For saturable reactor, voltage time and area is solid
Fixed, therefore choose suitable surge voltage grade, make impulse voltage generator apply the voltage of Insulation Test,
Just can take into account the Insulation Test of reactor.Process of the test is simple and convenient, when single test can take into account voltage
Between area and Insulation Test, ultrahigh in efficiency.
Voltage time and area test needs to be produced by calculating, and calculating is characterized by and determines the current waveform time
Zero point and flex point time.
, there is a lot of interference, if as in figure 2 it is shown, directly calculating in the voltage current waveform obtained due to test
Voltage time and area, can produce bigger error, and credibility is relatively low.Can be greatly improved after being filtered processing
Credibility.
Accompanying drawing explanation
Fig. 1 is the examination that saturable reactor for converter valve voltage time and area of the present invention obtained and took into account Insulation Test
Check system schematic diagram；
Fig. 2 is the voltage and current waveform of the saturable reactor for converter valve impact test of oscillograph recording；
Fig. 3 is the voltage and current waveform of saturable reactor for converter valve impact test after filtering optimization；
Fig. 4 is the zoning of voltage integrating meter area.
Detailed description of the invention
The present invention will be further described in detail below in conjunction with the accompanying drawings.
System embodiment
As it is shown in figure 1, saturable reactor for converter valve voltage time and area obtains and takes into account the examination of Insulation Test
Check system, including impulse voltage generator and oscillograph, impulse voltage generator is used for and saturation reactance to be measured
Device is connected；Described oscillographic voltage probe is used for measuring saturable reactor both end voltage to be measured, current probe
For measuring the electric current flowing through saturable reactor to be measured.
Pilot system is essentially identical with the pilot system of CN101718811B, differs only in and have employed impact
Testing transformer replaced by voltage generator.
Impulse voltage generator and reactor all have safety ground point.
Above-mentioned oscillograph also includes the equipment such as oscillograph.Current probe hangs over impulse voltage generator and reactor
The electric current flowing through reactor is measured on line between earth point.Voltage probe is connected in parallel on reactor two ends and measures
The voltage at reactor two ends.The voltage at oscillograph recording reactor two ends and the electric current flowing through reactor.
Embodiment of the method
Test method, comprises the steps:
Impulse voltage generator applies insulation test voltage at saturable reactor two ends to be measured, utilizes oscillograph to remember
Record voltage and current waveform；
Determine time zero and the flex point time T of current waveform, calculate voltage time and areaWherein,
U is voltage；Described time zero is the moment of the last zero crossing of voltage waveform, described flex point time T
Slope mutation time for current waveform.
Test is for saturable reactor, and voltage time and area is fixing, therefore chooses and suitably impacts electricity
Pressure grade, makes impulse voltage generator apply the voltage of Insulation Test, it becomes possible to take into account the insulation examination of reactor
Test.Process of the test is simple and convenient, and single test can take into account voltage time and area and Insulation Test, efficiency pole
High.
Computer program is utilized to calculate saturable reactor time and area.Calculate to be characterized by and determine current waveform
Time zero and flex point time.
As shown in Figure 2,3, 4, the first waveform to oscillograph recording is optimized process, and the present embodiment is adopted
The interference of voltage current waveform is filtered with recurrence average filter method.The time step of the voltage x current of oscillograph recording
A length of Δ t (μ s), takes N number of sampled point continuously and regards a queue as, and the regular length of queue is N, adopts every time
Sample to new data be placed on tail of the queue, and throw away a data (first in first out) of original head of the queue.Team
N number of data in row carry out arithmetic average computing, and the corresponding time also averages, and can generate new
Δ t (μ s) data sequence, and automatically generate the surge voltage after optimization, impulse current waveform.
Described time zero is the moment that last zero crossing is pressed in power taking, by voltage and the electricity of saturable reactor
Stream waveform time axle is translated by zero point.
The flex point time of described electric current is that the shorter time period interior (such as 1 μ s) before and after the sudden change of electric current steepness is cut
Line, the time corresponding to the point of intersection of tangents, as shown in Figure 3.The computing formula of described voltage time and area is:
Wherein, T is that electric current starts to current breakpoint the time from 0.
Voltage time integral area is actually the integration of the voltage in shadow region as shown in Figure 4.
Other sides of the prior art can also be used as other embodiments, zero crossing time and flex point time
Formula obtains.
It is presented above the detailed description of the invention that the present invention relates to, but the present invention is not limited to described enforcement
Mode.Under the thinking that the present invention provides, use the mode pair being readily apparent that to those skilled in the art
Technological means in above-described embodiment carries out converting, replaces, revises, and the effect played with in the present invention
Relevant art means essentially identical, realize goal of the invention the most essentially identical, so formation technical scheme
Above-described embodiment is finely adjusted formation, and this technical scheme still falls within protection scope of the present invention.
Claims (5)
1. saturable reactor voltage time and area obtains the system with Insulation Test, it is characterised in that include punching
Hitting voltage generator and oscillograph, described impulse voltage generator is for connecting with saturable reactor to be measured；Institute
Stating oscillographic voltage probe for measuring saturable reactor both end voltage to be measured, current probe is used for measuring stream
Cross the electric current of saturable reactor to be measured.
Saturable reactor voltage time and area the most according to claim 1 acquisition with Insulation Test is
System, it is characterised in that described current probe be connected to impulse voltage generator and saturable reactor earth point it
Between line on.
3. the test method of system as claimed in claim 1, it is characterised in that comprise the steps:
Impulse voltage generator applies insulation test voltage at saturable reactor two ends to be measured, utilizes oscillograph to remember
Record voltage and current waveform；
Determine time zero and the flex point time T of current waveform, calculate voltage time and areaWherein,
U is voltage；Described time zero is the moment of the last zero crossing of voltage waveform, described flex point time T
Slope mutation time for current waveform.
Test method the most according to claim 3, it is characterised in that voltage and current waveform is carried out
Filtering Processing is to filter the interference of voltage and current waveform.
Test method the most according to claim 4, it is characterised in that voltage and current waveform is carried out
Filter processing method is recurrence average filter method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390451.XA CN105842569A (en) | 2016-06-02 | 2016-06-02 | Saturation reactor voltage time area obtaining and insulation testing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390451.XA CN105842569A (en) | 2016-06-02 | 2016-06-02 | Saturation reactor voltage time area obtaining and insulation testing system and method |
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| Publication Number | Publication Date |
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| CN105842569A true CN105842569A (en) | 2016-08-10 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610390451.XA Pending CN105842569A (en) | 2016-06-02 | 2016-06-02 | Saturation reactor voltage time area obtaining and insulation testing system and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172734A (en) * | 2003-12-15 | 2005-06-30 | Tokyo Electric Power Co Inc:The | Easy impulse testing device |
| CN101339221A (en) * | 2008-08-12 | 2009-01-07 | 中国西电电气股份有限公司 | Test device for reactor volt-second characteristic of high voltage direct current transmission valve |
| CN101718811A (en) * | 2009-11-27 | 2010-06-02 | 中国电力科学研究院 | Device and method for testing voltage time and area of reactor |
| CN201569713U (en) * | 2009-11-27 | 2010-09-01 | 中国电力科学研究院 | Reactor voltage time area testing device |
| CN101949984A (en) * | 2010-08-16 | 2011-01-19 | 中国电力科学研究院 | Type test method of saturable reactor for converter valve |
| CN103941124A (en) * | 2014-04-17 | 2014-07-23 | 许继电气股份有限公司 | Method for testing saturation characteristics of direct-current transmission converter valve saturable reactor |
-
2016
- 2016-06-02 CN CN201610390451.XA patent/CN105842569A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172734A (en) * | 2003-12-15 | 2005-06-30 | Tokyo Electric Power Co Inc:The | Easy impulse testing device |
| CN101339221A (en) * | 2008-08-12 | 2009-01-07 | 中国西电电气股份有限公司 | Test device for reactor volt-second characteristic of high voltage direct current transmission valve |
| CN101718811A (en) * | 2009-11-27 | 2010-06-02 | 中国电力科学研究院 | Device and method for testing voltage time and area of reactor |
| CN201569713U (en) * | 2009-11-27 | 2010-09-01 | 中国电力科学研究院 | Reactor voltage time area testing device |
| CN101949984A (en) * | 2010-08-16 | 2011-01-19 | 中国电力科学研究院 | Type test method of saturable reactor for converter valve |
| CN103941124A (en) * | 2014-04-17 | 2014-07-23 | 许继电气股份有限公司 | Method for testing saturation characteristics of direct-current transmission converter valve saturable reactor |
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Application publication date: 20160810 |