CN107202947B - A kind of efficient thyristor valves component test system and test method - Google Patents
A kind of efficient thyristor valves component test system and test method Download PDFInfo
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- CN107202947B CN107202947B CN201710385197.9A CN201710385197A CN107202947B CN 107202947 B CN107202947 B CN 107202947B CN 201710385197 A CN201710385197 A CN 201710385197A CN 107202947 B CN107202947 B CN 107202947B
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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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/263—Circuits therefor for testing thyristors
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Abstract
The invention discloses a kind of efficient thyristor valves component test systems, including signal generating module, signal acquisition module, signal processing module, optical communication control module and thyristor converter valve module；Integrally apply the high pressure sinusoidal excitation of variable frequency to thyristor converter valve module by signal generating module, by the distributed Voltage measuring unit of more node current potentials, current measuring unit and impedance projectional technique, routine test can be carried out to thyristor converter valve module.Meanwhile the invention also discloses converter valve thyristor level electric performance test methods.The present invention can carry out testing impedance, short-circuit test and low pressure triggering test to the converter valve components that any thyristor grade is composed in series simultaneously, substantially increase testing efficiency, shorten converter valve maintenance duration and delivery test period.
Description
Technical field
The present invention relates to D.C. high voltage transmission thyristor valves experimental technique fields, and in particular to a kind of efficient crystalline substance
Brake tube converter valve components test macro.
Background technique
Promotion of the high voltage dc transmission technology in technical fields such as power electronics, microelectronics, control theory and high pressure theories
Under developed rapidly, the constantly appearance to large capacity, high voltage trend development, especially high-pressure high-power thyristor is
The inverter equipment of DC transmission engineering opens new approach.Converter valve is the core equipment of HVDC transmission system,
Performance directly affects the reliability and stability of whole system, and thyristor is widely applied by the advantage in pressure resistance and through-current capability
In inverter equipment, by the way that desired system transmission voltage can be obtained in the series connection of multiple Thyristors.High voltage direct current at present
The inverter of power transmission engineering is all made of modularized design, i.e. a converter valve, is made of several thyristor components, and a brilliant lock
Tube assembly includes multiple thyristor grade units again.Thyristor grade unit is the minimum structural unit of converter valve, each thyristor grade
Again comprising thyristor, thyristor control unit and press damping circuit.Thyristor control unit is the core of thyristor grade unit
Element, should have completed from system circuit module take can, and other than having the function of triggered as normal to thyristor, and also
Include protection trigger circuit, ensures thyristor in off-state and in reverse recovery by can correctly be touched when high-voltage pulse
The functions such as hair.
Before DC transmission engineering puts into operation and during overhaul of the equipments, each thyristor grade unit to converter valve is needed
Detection test is carried out, to ensure that thyristor electric property meets design requirement, guarantees the reliability and equipment of DC transmission engineering
Safety.Existing measuring technology is all made of the work that alternating current inputs form generation about 300V or so of additional isolating transformer
Frequency sinusoidal voltage is applied to single-stage thyristor cell both ends and is tested, and testing impedance uses the side of similar bridge test
Method；On the one hand, on the other hand the underintegration of this kind of test macro needs successively to survey every level-one thyristor cell
Examination；By taking ultra-high voltage converter station as an example, a converter station includes nearly 3,000 thyristor cells, to complete complete overhaul need of work
It takes a significant amount of time, has seriously affected the progress of site examining and repairing test.
Extensive use with Pulse Power Techniques in each field of civilian industry proposes repetition rate nanosecond pulse power supply
It is different from the new demand of large-scale pulse power device, i.e. lightness, miniaturization, cheap, long-life and high reliability.Cause
This, needs to invent other highly efficient test macros to accelerate the progress of direct-current transmission converter valve site examining and repairing and test.
Summary of the invention
It is an object of that present invention to provide a kind of efficient thyristor valves component test system, the thyristor valves
Component test system can simultaneously test thyristor grade units multiple in converter valve components, improve testing efficiency, drop
Low work repetitive rate, solves existing test macro and is merely able to successively test every level-one thyristor cell, low efficiency
Under, the extremely cumbersome problem of operation.Meanwhile additionally providing a kind of thyristor grade impedance, short circuit, impedance detecting method.
The present invention is achieved through the following technical solutions:
A kind of efficient thyristor valves component test system, including signal generating module, signal acquisition module, letter
Number processing module, optical communication control module and thyristor converter valve module；
The signal generating module is used for the high pressure sinusoidal signal that output frequency can be changed, and is applied to by n thyristor grade
The thyristor converter valve module both ends being composed in series；
The signal acquisition module is used to collect the voltage signal group of thyristor grade, electricity in converter valve components under different frequency
Signal is flowed, and voltage signal group, current signal are transferred to signal processing module, the voltage signal group is right under different frequency
The set of the peak voltage signal at each thyristor both ends answered, current signal are the thyristor converter flowed through under respective frequencies voltage
The peak-current signal of valve module；
The signal processing module is used to voltage signal group, current signal carrying out impedance op to obtain impedance results；Institute
It states signal processing module to connect with thyristor valves assembly communication, the signal processing module and signal generating module, signal
Acquisition module is to be electrically connected；
The optical communication control module is for carrying out communication control between signal processing module and thyristor converter valve module the two
System connection.
Signal generating module includes signal generator and power amplifier, and the signal generator and power amplifier are electrical
Connection.
Signal acquisition module includes distributed Voltage measuring unit, current measuring unit and data collection system；Described point
Cloth voltage measurement unit is the voltage divider being arranged between each thyristor grade, for measuring each thyristor grade both ends
Voltage, input terminal is connected with thyristor converter valve module, and output end is connected with data collection system；Current measuring unit is used
The electric current of thyristor grade is flowed through in measurement, output end is connected with data collection system.
Signal processing module includes central processor CPU.
Optical communication control module includes photoelectric communication interface and the optical fiber to communicate to connect, and photoelectric communication interface has AP
Interface and ST interface, optical fiber by the AP interface of photoelectric communication interface and ST interface to communicate to connect optical communication control module and
Thyristor converter valve module.Photoelectric communication interface can be compatible with AP interface and the two kinds of optical fiber of ST interface.
Connection type in thyristor converter valve module between the thyristor control unit of n thyristor grade are as follows: upper level
The return optical fiber interface IP of thyristor control unit is connected with the triggering optical fiber interface FP of next stage thyristor control unit, and first
The triggering optical fiber interface FP of grade thyristor control unit is connected with the triggering optical fiber of optical communication control module, n-th grade of thyristor control
The return optical fiber interface IP of unit processed is connected with the return optical fiber of optical communication control module；When test, optical communication control module is logical
It crosses triggering optical fiber interface FP to be connected with thyristor-controlled unit communication, optical communication control module obtains brilliant by return optical fiber interface IP
Thyristor control unit communicates and feeds back to signal processing module.
A kind of test method of thyristor converter valve module, testing impedance including the following steps:
(1) it obtains test signal: under different frequency high pressure sinusoidal excitation, obtaining each thyristor in thyristor converter valve module
The voltage signal group at both ends, and the current signal group for flowing through thyristor converter valve module is obtained, the voltage signal group is difference
The set of the peak voltage signal at corresponding each thyristor both ends under frequency, current signal group are to flow through under respective frequencies voltage
The set of the peak-current signal of thyristor converter valve module；
(2) processing test signal: in conjunction with the return light of triggering fiber-optic signal and collection that optical communication control module exports
Optical fiber signaling, by signal processing module with the voltage and current signal data group of following equation processing acquisition:
Upeak(fi)=Ipeak(fi)Z(fi)
In formula: UpeakFor crest voltage；IpeakFor peak point current；fiFor test frequency, i=1,2...n, simultaneous, which calculates, is
The impedance value measured and inferential impedance value are compared judgement, thyristor can be obtained and change by the impedance value that can measure thyristor
Flow the state of each thyristor of valve module.
Thyristor valves component test system can be applied to the testing impedance of thyristor converter valve module, short-circuit test
It triggers and tests with low pressure.
Short-circuit test predominantly detects whether thyristor in thyristor grade unit occurs short circuit or open circuit.Thyristor grade unit is short
Drive test uses the AC power source (being arranged by the high pressure sinusoidal excitation of changeable frequency) that frequency is 50Hz, applies crest voltage about
For 350V power-frequency voltage in thyristor grade both ends, detected to obtain thyristor grade both ends by the divider in parallel with thyristor grade
Peak voltage signal, by the peak voltage signal of acquisition compared with the voltage threshold of setting, if being higher than minimum voltage, experiment is
Pass through.The electric current of thyristor is flowed through in detection simultaneously, discriminates whether to be more than the current threshold set, if being not above, explanation is deposited
In open circuit situation, then the failure of an experiment.Divider herein is exactly one of the measuring device of distributed measurement unit, and divider is in parallel
The both ends of thyristor grade are set.
The main Trigger Function for checking thyristor grade control unit of low pressure triggering test, it is ensured that thyristor can accurately respond touching
It signals.The test of thyristor grade unit triggers (passes through the height of changeable frequency as experiment power supply using power frequency supply in main circuit
Press sinusoidal excitation setting), pilot system further includes the parts such as electronic switch, relay, voltage and current detection circuit.Triggering test
By the way of zero crossing triggering；Electronic switch control triggering phase angle；Voltage and current detection circuit is located at electronic switch and relay
Between device, and it is connected with CPU.This test carries out the survey of thyristor control unit Trigger Function by detection thyristor both end voltage
Examination, when thyristor is reliably triggered, both end voltage falls to zero substantially.Power-frequency voltage, number are applied to thyristor grade unit
Thyristor control unit voluntarily takes electricity to terminate after a power frequency period, is in normal operating conditions, and thyristor is triggered.
Inventive concept of the invention is: the control unit of multiple thyristor grades is passed through triggering optical fiber interface FP, return
Optical fiber interface IP, which is connected, forms core test cell with signal processing module, provides variable-frequency high pressure sinusoidal excitation by outside,
Realize testing impedance, short-circuit test and low pressure triggering test.The present invention can simultaneously to n thyristor grade unit in valve module into
Row test, greatly improves testing efficiency, reduces work repetitive rate.
Compared with prior art, the present invention having the following advantages and benefits:
1, the present invention can test the impedance behavior of n thyristor grade in converter valve components simultaneously, improve testing efficiency,
Reduce test repetitive rate.
2, test macro of the invention is simple and effective, and testing efficiency is the geometry grade times of single thyristor grade testing efficiency
Number, testing efficiency improve significant.
3, the present invention can also realize the short-circuit test and low pressure triggering test of n thyristor grade simultaneously, grading to thyristor
The comprehensive electric performance test of row.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the short-circuit test figure of single thyristor cell of the invention.
Fig. 3 is the triggering test chart of single thyristor cell of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figure 1, a kind of efficient thyristor valves component test system, including signal generating module, signal
Acquisition module, signal processing module, optical communication control module and thyristor converter valve module；
The signal generating module is used for the high pressure sinusoidal signal that output frequency can be changed, and is applied to by n thyristor grade
The thyristor converter valve module both ends being composed in series；
The signal acquisition module is used to collect the voltage signal group of thyristor grade, electricity in converter valve components under different frequency
Signal is flowed, and voltage signal group, current signal are transferred to signal processing module, the voltage signal group is right under different frequency
The set of the peak voltage signal at each thyristor both ends answered, current signal are the thyristor converter flowed through under respective frequencies voltage
The peak-current signal of valve module；
The signal processing module is used to voltage signal group, current signal carrying out impedance op to obtain impedance results；Institute
It states signal processing module to connect with thyristor valves assembly communication, the signal processing module and signal generating module, signal
Acquisition module is to be electrically connected；
The optical communication control module is for carrying out communication control between signal processing module and thyristor converter valve module the two
System connection.
Signal generating module includes signal generator and power amplifier, and the signal generator and power amplifier are electrical
Connection.
Signal acquisition module includes distributed Voltage measuring unit, current measuring unit and data collection system；Described point
Cloth voltage measurement unit is the voltage divider being arranged between each thyristor grade, for measuring each thyristor grade both ends
Voltage, input terminal is connected with thyristor converter valve module, and output end is connected with data collection system；Current measuring unit is used
The electric current of thyristor grade is flowed through in measurement, output end is connected with data collection system.
Signal processing module includes central processor CPU.
Optical communication control module includes photoelectric communication interface and the optical fiber to communicate to connect, and photoelectric communication interface has AP
Interface and ST interface, optical fiber by the AP interface of photoelectric communication interface and ST interface to communicate to connect optical communication control module and
Thyristor converter valve module.Photoelectric communication interface can be compatible with AP interface and the two kinds of optical fiber of ST interface.
Connection type in thyristor converter valve module between the thyristor control unit of n thyristor grade are as follows: upper level
The return optical fiber interface IP of thyristor control unit is connected with the triggering optical fiber interface FP of next stage thyristor control unit, and first
The triggering optical fiber interface FP of grade thyristor control unit is connected with the triggering optical fiber of optical communication control module, n-th grade of thyristor control
The return optical fiber interface IP of unit processed is connected with the return optical fiber of optical communication control module；When test, optical communication control module is logical
It crosses triggering optical fiber interface FP to be connected with thyristor-controlled unit communication, optical communication control module obtains brilliant by return optical fiber interface IP
Thyristor control unit communicates and feeds back to signal processing module.
Embodiment 2
The impedance behavior of thyristor converter valve module is tested:
1, the voltage and current signal of each thyristor grade unit in thyristor converter valve module is obtained: with the height of changeable frequency
Pressure sinusoidal excitation is applied to the both ends of thyristor converter valve module, obtains corresponding each crystalline substance under each frequency at different frequencies
Distributed Voltage measuring unit can be used to the peak value electricity of each thyristor cell in the crest voltage and peak point current of brake tube unit
Pressure measures, and is measured using current measuring unit to peak point current；
2, test data is handled: by signal processing module with the voltage and current signal array of following equation processing acquisition:
Upeak(fi)=Ipeak(fi)Z(fi)
In formula: UpeakFor crest voltage；IpeakFor peak point current；fiFor test frequency, i=1,2...n, simultaneous, which calculates, is
Impedance value can be measured, the impedance value measured and inferential impedance value are compared judgement, thyristor converter valve module can be obtained
In each thyristor grade impedance state.
Embodiment 3
As shown in Fig. 2, short-circuit test predominantly detects whether thyristor in thyristor grade unit occurs short circuit or open circuit.Brilliant lock
Pipe grade unit short-circuit test uses frequency for the AC power source (being arranged by the high pressure sinusoidal excitation of changeable frequency) of 50Hz, applies
The power-frequency voltage that crest voltage is about 350V.Thyristor both ends crest voltage, and the voltage threshold with setting are detected by divider
Value is compared differentiation, if being higher than minimum voltage, experiment passes through.The electric current of thyristor is flowed through in detection simultaneously, discriminates whether
It has been more than the current threshold of setting, if being not above, has illustrated there are open circuit situation, then the failure of an experiment.Divider herein is exactly
One of the measuring device of distributed measurement unit, divider are arranged in parallel at the both ends of each thyristor grade.
Embodiment 4
As shown in figure 3, the main Trigger Function for checking thyristor grade control unit of low pressure triggering test, it is ensured that thyristor can
Accurate response trigger signal.The test of thyristor grade unit triggers (passes through frequency as experiment power supply using power frequency supply in main circuit
The variable high pressure sinusoidal excitation setting of rate), pilot system further includes the portions such as electronic switch, relay, voltage and current detection circuit
Point.Triggering test is by the way of zero crossing triggering；Electronic switch control triggering phase angle；Voltage and current detection circuit is located at electronics
Between switch and relay, and it is connected with CPU.This test carries out thyristor control unit touching by detection thyristor both end voltage
Functional test is sent out, when thyristor is reliably triggered, both end voltage falls to zero substantially.Power frequency is applied to thyristor grade unit
Voltage, thyristor control unit voluntarily takes electricity to terminate after several power frequency periods, is in normal operating conditions, and thyristor is triggered.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of efficient thyristor valves component test system, which is characterized in that adopted including signal generating module, signal
Collect module, signal processing module, optical communication control module and thyristor converter valve module；
The signal generating module is used for the high pressure sinusoidal signal that output frequency can be changed, and is applied to and is connected by n thyristor grade
The thyristor converter valve module both ends of composition, in thyristor converter valve module between the thyristor control unit of n thyristor grade
Connection type are as follows: upper level thyristor control unit return optical fiber interface IP and next stage thyristor control unit triggering
Optical fiber interface FP is connected, the triggering optical fiber of triggering the optical fiber interface FP and optical communication control module of first order thyristor control unit
It is connected, the return optical fiber interface IP of n-th grade of thyristor control unit is connected with the return optical fiber of optical communication control module；Test
When, optical communication control module is connected by triggering optical fiber interface FP with thyristor-controlled unit communication, and optical communication control module passes through
Return optical fiber interface IP obtains thyristor control unit and communicates and feed back to signal processing module；
The signal acquisition module is used to collect the voltage signal group of thyristor grade in converter valve components, electric current letter under different frequency
Number, and voltage signal group, current signal are transferred to signal processing module, the voltage signal group is corresponding under different frequency
The set of the peak voltage signal at each thyristor both ends, current signal are the thyristor converter valve group flowed through under respective frequencies voltage
The peak-current signal of part；
Signal acquisition module includes distributed Voltage measuring unit, current measuring unit and data collection system；The distribution
Voltage measurement unit is the voltage divider being arranged between each thyristor grade, for measuring the electricity at each thyristor grade both ends
Pressure, input terminal are connected with thyristor converter valve module, and output end is connected with data collection system；Current measuring unit is for surveying
Amount flows through the electric current of thyristor grade, and output end is connected with data collection system；
The signal processing module is used to voltage signal group, current signal carrying out impedance op to obtain impedance results；The letter
Number processing module is connected with thyristor valves assembly communication, the signal processing module and signal generating module, signal acquisition
Module is to be electrically connected；
The optical communication control module is used to carry out communication control company between signal processing module and thyristor converter valve module the two
It connects.
2. thyristor valves component test system according to claim 1, which is characterized in that signal generating module includes
Signal generator and power amplifier, the signal generator and power amplifier are electrically connected.
3. thyristor valves component test system according to claim 1, which is characterized in that signal processing module includes
Central processor CPU.
4. thyristor valves component test system according to claim 1, which is characterized in that optical communication control module packet
Photoelectric communication interface and the optical fiber to communicate to connect are included, there is photoelectric communication interface AP interface and ST interface, optical fiber to pass through light
The AP interface and ST interface of electric communication interface are to communicate to connect optical communication control module and thyristor converter valve module.
5. a kind of thyristor valves component test system according to any one of claims 1-4 can be applied to thyristor and change
Flow testing impedance, short-circuit test and low pressure the triggering test of valve module.
6. a kind of test method of thyristor converter valve module, which is characterized in that testing impedance including the following steps:
(1) it obtains test signal: under different frequency high pressure sinusoidal excitation, obtaining each thyristor both ends in thyristor converter valve module
Voltage signal group, and obtain and flow through the current signal group of thyristor converter valve module, the voltage signal group is different frequency
Under corresponding each thyristor both ends peak voltage signal set, current signal group is the brilliant lock that flows through under respective frequencies voltage
The set of the peak-current signal of pipe converter valve components；
(2) processing test signal: in conjunction with the return optical fiber letter of the optical communication control module triggering fiber-optic signal exported and collection
Number, by signal processing module with the voltage and current signal data group of following equation processing acquisition:
Upeak(fi)=Ipeak(fi)Z(fi)
In formula: UpeakFor crest voltage；IpeakFor peak point current；fiFor test frequency, i=1,2...n, simultaneous calculating can be surveyed
The impedance value for obtaining thyristor, is compared judgement for the impedance value measured and inferential impedance value, thyristor valves can be obtained
The state of each thyristor of component.
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