CN105044527B - A kind of saturable reactor for converter valve damping characteristic experimental rig and its test method - Google Patents
A kind of saturable reactor for converter valve damping characteristic experimental rig and its test method Download PDFInfo
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- CN105044527B CN105044527B CN201510496229.3A CN201510496229A CN105044527B CN 105044527 B CN105044527 B CN 105044527B CN 201510496229 A CN201510496229 A CN 201510496229A CN 105044527 B CN105044527 B CN 105044527B
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Abstract
The present invention relates to a kind of saturable reactor for converter valve damping characteristic experimental rig and its test method, device includes capacitor C0, commutation inductance Lu, stray capacitance C when equivalent converter valve is openeds, the first damping branch, damping unit and two test product saturable reactor Lsat；Capacitor C0One end ground connection, the other end and commutation inductance LuOne end connection；Commutation inductance LuThe other end respectively with stray capacitance CsOne end and two test product saturable reactor LsatBetween midpoint connection；Stray capacitance CsThe other end ground connection；Two test product saturable reactor LsatSeries connection, one of test product saturable reactor LsatOne end with first damping branch connect；Another test product saturable reactor LsatOne end connect with damping unit；The damping resistance R of damping unit0, damping capacitor CdIt is grounded with thyristor Thy.The present invention is provided to the test method of saturable reactor damping characteristic test, can the circuit topology opened of equivalent converter valve, damping of the assessment saturable reactor to electromagnetic viscosimeter.
Description
Technical field
The present invention relates to a kind of experimental rig of converter valve and its test methods, and in particular to a kind of converter valve saturation electricity
Anti- device damping characteristic experimental rig and its test method.
Background technique
Saturable reactor is the key components and parts of extra-high voltage direct-current transmission converter valve, in tens microseconds that converter valve is opened
It carries limitation thyristor in period and opens current-rising-rate, and the function of damping stray capacitance bring electromagnetic viscosimeter.
Existing technology inhibits the design for opening current-rising-rate and test to have more research saturable reactor, also takes
Obtained great successes.And the research about saturable reactor damping characteristic is very few, up to the present, rarely has about saturation reactance
The article or patent of device damping characteristic in converter valve opening process.
In order to solve the Insulation Problems of equipment of work under the conditions of extra-high voltage, the volume of the shielding case of converter valve can all be done
It is bigger, while reducing equipment surface electric field strength, the stray capacitance of tens pF can be also brought to converter valve.In the change of current
When valve is opened, since the Potential distribution of position each in equipment is redistributed, the stray capacitance of converter valve will and saturable reactor
Collective effect forms the electromagnetic viscosimeter of high frequency.This is the main source of converter valve electromagnetic disturbance.Especially when converter valve works
Under wide-angle and overvoltage condition, valve open the voltage born constantly will be quite high, electromagnetic viscosimeter is particularly acute.This is just needed
Saturable reactor provides the damping characteristic of a part, and the energy damping of electromagnetic viscosimeter is fallen.
Summary of the invention
To solve above-mentioned deficiency of the prior art, the object of the present invention is to provide a kind of resistances of saturable reactor for converter valve
Damping characteristics experimental rig and its test method, the present invention provide a kind of means of testing, can the circuit opened of equivalent converter valve open up
It flutters, to assess saturable reactor to the damping of electromagnetic viscosimeter.
The purpose of the present invention is adopt the following technical solutions realization:
The present invention provides a kind of saturable reactor for converter valve damping characteristic experimental rig, it is improved in that described
Device includes capacitor C0, commutation inductance Lu, stray capacitance C when equivalent converter valve is openeds, the first damping branch, damping it is single
Member and two test product saturable reactor Lsat；The capacitor C0One end ground connection, the other end and commutation inductance LuOne end connection；
The commutation inductance LuThe other end respectively with stray capacitance CsOne end and two test product saturable reactor LsatBetween midpoint
Connection；The stray capacitance CsThe other end ground connection；Described two test product saturable reactor LsatSeries connection, one of test product are full
With reactor LsatOne end with first damping branch connect；Another test product saturable reactor LsatOne end and damping unit connect
It connects；The damping resistance R of the damping unit0, damping capacitor CdIt is grounded with thyristor Thy.
Further, the damping unit includes the second damping branch, diode-damping resistance branch and thyristor Thy；
The second damping branch includes the damping capacitor C of thyristor gradedWith damping resistance Rd；The diode-damping resistance branch packet
Include diode D and damping resistance R0；The damping resistance RdOne end and damping capacitor CdOne end connection, damping resistance Rd's
The other end is connect with the anode of the cathode of diode D and thyristor Thy respectively；Damping capacitor CdThe other end respectively with damping electricity
Hinder R0One end connected with the cathode of thyristor Thy；The anode and damping resistance R of diode D0The other end connection.
Further, the damping capacitor C' of the first damping branch routing thyristor gradedWith damping resistance R'dIt is composed in series,
The damping capacitor C'dGround connection.
The present invention also provides a kind of test methods of saturable reactor for converter valve damping characteristic experimental rig, improve it
It is in the method includes the following steps:
(1) by capacitor C0Charge to the turning-on voltage U of converter valve0, stray capacitance C in the experimental rigs, damping
Capacitor CdAnd C'dIt is charged to respective turning-on voltage；
(2) thyristor Thy, capacitor C are triggered0, stray capacitance Cs, damping capacitor CdAnd C'dOn charge will all pass through crystalline substance
The discharge current of brake tube Thy release, formation becomes thyristor current flows IthyA part；Capacitor C0Pass through commutation inductance LuElectric discharge
The electric current I of formationL, for simulating the converting commutating current of converter valve；Stray capacitance CsWith saturable reactor LsatCooperatively form height
Frequency electromagnetic viscosimeter, high-frequency electromagnetic oscillation is in saturable reactor LsatAnd first damping branch in R'dIn the second damping branch
RdStabilization is finally reached under collective effect；
(3) diode D and damping resistance R0It is in thyristor current flows IThyWhen oscillation is negative current, current path is provided, is prevented
Only there is reverse voltage overshoot in the both ends thyristor Thy；
(4) stray capacitance C when finally being opened according to converter valvesThe oscillation amplitude and oscillation of caused high-frequency electromagnetic oscillation
Time, to assess saturable reactor LsatDamping；If high-frequency electromagnetic oscillation is damped in 10-90 microsecond, indicate full
Heavy damping is provided with reactor；If the higher-order of oscillation continues 1ms or more, or even continues entire commutation process, then it represents that saturation electricity
Anti- device provides underdamping；It between these, then is middle damping.
The excellent effect that technical solution provided by the invention has is:
1. the present invention has built damping characteristic experimental rig, reproduced in converter valve in laboratory conditions stray capacitance with
The electromagnetic viscosimeter phenomenon of stray inductance complexity.
2. experimental rig of the present invention and test method, can be in converter valve design and R&D process just to the change of current
The electromagnetic viscosimeter generated in valve real work is accurately assessed, and is had for the optimization of converter valve electric parameter very positive
Effect.
Detailed description of the invention
Fig. 1 is saturable reactor damping characteristic test and experiment device topological diagram provided by the invention；
Fig. 2 is voltage and current waveform diagram during test provided by the invention；
Fig. 3 is damping figure of the different reactors provided by the invention to stray capacitance electromagnetic viscosimeter.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual component and function are optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.Herein, these embodiments of the invention can individually or generally be indicated that this is only with term " invention "
For convenience, and if in fact disclosing the invention more than one, the range for being not meant to automatically limit the application is to appoint
What single invention or inventive concept.
The topological diagram of saturable reactor for converter valve damping characteristic experimental rig provided by the invention is as shown in Figure 1, described
Device includes capacitor C0, commutation inductance Lu, stray capacitance C when equivalent converter valve is openeds, the first damping branch, damping it is single
Member and two test product saturable reactor Lsat；The capacitor C0One end ground connection, the other end and commutation inductance LuOne end connection；
The commutation inductance LuThe other end respectively with stray capacitance CsOne end and two test product saturable reactor LsatBetween midpoint
Connection；The stray capacitance CsThe other end ground connection；Described two test product saturable reactor LsatSeries connection, one of test product are full
With reactor LsatOne end with first damping branch connect；Another test product saturable reactor LsatOne end and damping unit connect
It connects；The damping resistance R of the damping unit0, damping capacitor CdIt is grounded with thyristor Thy.
The damping unit includes the second damping branch, diode-damping resistance branch and thyristor Thy；Described second
Damping branch includes the damping capacitor C of thyristor gradedWith damping resistance Rd；The diode-damping resistance branch includes diode
D and damping resistance R0；The damping resistance RdOne end and damping capacitor CdOne end connection, damping resistance RdThe other end point
It is not connect with the anode of the cathode of diode D and thyristor Thy；Damping capacitor CdThe other end respectively with damping resistance R0One
End is connected with the cathode of thyristor Thy；The anode and damping resistance R of diode D0The other end connection.First damping branch routing
The damping capacitor C' of thyristor gradedWith damping resistance R'dIt is composed in series, the damping capacitor C'dGround connection.
The present invention provides a kind of test method of saturable reactor for converter valve damping characteristic experimental rig, including following steps
It is rapid:
(1) by capacitor C0Charge to the turning-on voltage U of converter valve0, stray capacitance C in the experimental rigs, damping
Capacitor CdAnd C'dIt is charged to respective turning-on voltage；
(2) thyristor Thy, capacitor C are triggered0, stray capacitance Cs, damping capacitor CdAnd C'dOn charge will all pass through crystalline substance
The discharge current of brake tube Thy release, formation becomes thyristor current flows IthyA part；Capacitor C0Pass through commutation inductance LuElectric discharge
The electric current I of formationL, for simulating the converting commutating current of converter valve；Stray capacitance CsWith saturable reactor LsatCooperatively form height
Frequency electromagnetic viscosimeter, high-frequency electromagnetic oscillation is in saturable reactor LsatAnd first damping branch in R'dIn the second damping branch
RdStabilization is finally reached under collective effect；As shown in Figure 2.
(3) diode D and damping resistance R0It is in thyristor current flows IThyWhen oscillation is negative current, current path is provided, is prevented
Only there is reverse voltage overshoot in the both ends thyristor Thy；As shown in Figure 2.
(4) stray capacitance C when finally being opened according to converter valvesThe oscillation amplitude and oscillation of caused high-frequency electromagnetic oscillation
Time, to assess saturable reactor LsatDamping.If high-frequency electromagnetic oscillation is damped in tens microseconds, indicate full
Heavy damping is provided with reactor；If the higher-order of oscillation continues 1ms or more, or even continue for entire commutation process, then it represents that saturation
Reactor provides underdamping；It between these, then is middle damping.Fig. 3 shows the saturation using different damping characteristic
Damping of the converter valve circuit of reactor to high-frequency electromagnetic oscillation.
Saturable reactor for converter valve damping characteristic experimental rig provided by the invention and its test method equivalent can change
The circuit topology that stream valve is opened, to assess saturable reactor to the damping of electromagnetic viscosimeter.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modification perhaps equivalent replacement these without departing from any modification of spirit and scope of the invention or equivalent replacement, applying
Within pending claims of the invention.
Claims (4)
1. a kind of saturable reactor for converter valve damping characteristic experimental rig, which is characterized in that described device includes capacitor C0、
Commutation inductance Lu, stray capacitance C when equivalent converter valve is openeds, the first damping branch, damping unit and two test products saturation
Reactor Lsat；The capacitor C0One end ground connection, the other end and commutation inductance LuOne end connection；The commutation inductance Lu's
The other end respectively with stray capacitance CsOne end and two test product saturable reactor LsatBetween midpoint connection；The stray electrical
Hold CsThe other end ground connection；Described two test product saturable reactor LsatSeries connection, one of test product saturable reactor LsatOne
End is connect with the first damping branch；Another test product saturable reactor LsatOne end connect with damping unit；The damping unit
Damping resistance R0, damping capacitor CdIt is grounded with thyristor Thy.
2. saturable reactor for converter valve damping characteristic experimental rig as described in claim 1, which is characterized in that the damping
Unit includes the second damping branch, diode-damping resistance branch and thyristor Thy；The second damping branch includes brilliant lock
The damping capacitor C of pipe gradedWith damping resistance Rd；The diode-damping resistance branch includes diode D and damping resistance R0；Institute
State damping resistance RdOne end and damping capacitor CdOne end connection, damping resistance RdThe other end cathode with diode D respectively
It is connected with the anode of thyristor Thy；Damping capacitor CdThe other end respectively with damping resistance R0One end and thyristor Thy yin
Pole connection；The anode and damping resistance R of diode D0The other end connection.
3. saturable reactor for converter valve damping characteristic experimental rig as described in claim 1, which is characterized in that described first
Damp the damping capacitor C' of branch routing thyristor gradedWith damping resistance R'dIt is composed in series, the damping capacitor C'dGround connection.
4. a kind of test of saturable reactor for converter valve damping characteristic experimental rig as claimed in any one of claims 1-3
Method, which is characterized in that the method includes the following steps:
(1) by capacitor C0Charge to the turning-on voltage U of converter valve0, stray capacitance C in the experimental rigs, damping capacitor Cd
And C'dIt is charged to respective turning-on voltage；
(2) thyristor Thy, capacitor C are triggered0, stray capacitance Cs, damping capacitor CdAnd C'dOn charge will all pass through thyristor
The discharge current of Thy release, formation becomes thyristor current flows IthyA part；Capacitor C0Pass through commutation inductance LuElectric discharge is formed
Electric current IL, for simulating the converting commutating current of converter valve；Stray capacitance CsWith saturable reactor LsatCooperatively form high-frequency electrical
Magnetic oscillation, high-frequency electromagnetic oscillation is in saturable reactor LsatAnd first damping branch in R'dWith the R in the second damping branchd
Stabilization is finally reached under collective effect；
(3) diode D and damping resistance R0It is in thyristor current flows IThyWhen oscillation is negative current, current path is provided, crystalline substance is prevented
There is reverse voltage overshoot in the both ends brake tube Thy；
(4) stray capacitance C when finally being opened according to converter valvesThe oscillation amplitude and duration of oscillation of caused high-frequency electromagnetic oscillation,
To assess saturable reactor LsatDamping；If high-frequency electromagnetic oscillation is damped in 10-90 μ s, saturation reactance is indicated
Device provides heavy damping；If the higher-order of oscillation continues 1ms or more, or even continues entire commutation process, then it represents that saturable reactor mentions
Underdamping is supplied；It is then middle damping between 90 μ s~1ms.
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| CN107664719B (en) * | 2016-07-28 | 2021-01-01 | 全球能源互联网研究院 | Method for monitoring state of high-voltage direct-current transmission damping capacitor |
| CN110988632B (en) * | 2019-12-16 | 2022-08-12 | 西安西电电力系统有限公司 | Converter valve component, converter valve and external insulation test method of converter valve |
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| JPS5768668A (en) * | 1980-10-14 | 1982-04-27 | Mitsubishi Electric Corp | High power oscillating pulse generator |
| CN101907652A (en) * | 2010-06-25 | 2010-12-08 | 中国电力科学研究院 | Damping circuit current measuring device of high-voltage direct-current power transmission thyristor |
| CN101923593A (en) * | 2010-08-23 | 2010-12-22 | 中国电力科学研究院 | Performance analysis method of saturated reactor for converter valve in thyristor impedance state |
| CN101980035A (en) * | 2010-09-10 | 2011-02-23 | 中国电力科学研究院 | Experiment design and analysis method for most severe current stress born by thyristor used for converter valve |
| JP2011114991A (en) * | 2009-11-30 | 2011-06-09 | Hitachi Ltd | Power converter |
| CN104808070A (en) * | 2015-04-23 | 2015-07-29 | 许继集团有限公司 | Converter valve thyristor level damping loop parameter testing device and method |
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Patent Citations (6)
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|---|---|---|---|---|
| JPS5768668A (en) * | 1980-10-14 | 1982-04-27 | Mitsubishi Electric Corp | High power oscillating pulse generator |
| JP2011114991A (en) * | 2009-11-30 | 2011-06-09 | Hitachi Ltd | Power converter |
| CN101907652A (en) * | 2010-06-25 | 2010-12-08 | 中国电力科学研究院 | Damping circuit current measuring device of high-voltage direct-current power transmission thyristor |
| CN101923593A (en) * | 2010-08-23 | 2010-12-22 | 中国电力科学研究院 | Performance analysis method of saturated reactor for converter valve in thyristor impedance state |
| CN101980035A (en) * | 2010-09-10 | 2011-02-23 | 中国电力科学研究院 | Experiment design and analysis method for most severe current stress born by thyristor used for converter valve |
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Address after: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital Applicant after: GLOBAL ENERGY INTERCONNECTION Research Institute Applicant after: State Grid Corporation of China Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Applicant before: STATE GRID SMART GRID Research Institute Applicant before: State Grid Corporation of China |
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