CN205786995U - Direct current transportation Thyristors in series all presses performance detecting system and voltage check device - Google Patents
Direct current transportation Thyristors in series all presses performance detecting system and voltage check device Download PDFInfo
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- CN205786995U CN205786995U CN201620496694.7U CN201620496694U CN205786995U CN 205786995 U CN205786995 U CN 205786995U CN 201620496694 U CN201620496694 U CN 201620496694U CN 205786995 U CN205786995 U CN 205786995U
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Abstract
This utility model relates to direct current transportation Thyristors in series and all presses performance detecting system and voltage check device; this performance detecting system includes controlling part and at least one current detection section; current detection section includes two ports; the dividing potential drop branch road having a string to be provided with divider resistance is connected between the two port; dividing potential drop branch road and a portable protective gaps are arranged in parallel; the two ends of divider resistance connect the high-pressure side of an isolating transformer, and the low-pressure side output of isolating transformer connects control part.Dividing potential drop branch road can be carried out overvoltage protection by portable protective gaps, it is to avoid dividing potential drop branch road bears excessive voltage；Further, by the blood pressure lowering of isolating transformer, it is possible to be low-voltage by high voltage drop, and exporting to controlling part, control part correspondingly can process according to this low voltage signal, all to press test, it is ensured that all press the exploitativeness of test.So, this system is significant to all pressures performance of inspection direct current transportation thyristor valve.
Description
Technical field
This utility model relates to direct current transportation Thyristors in series and all presses performance detecting system and voltage check device.
Background technology
China builds the high voltage direct current transmission project total line length put into operation and transmission capacity all occupies generation at present
Prostatitis, boundary, is made that tremendous contribution for China's transferring electricity from the west to the east strategy.Thyristor valve is the core of DC transmission system
Heart equipment, has that technical difficulty is big, integrated level is big, interdisciplinary fields are many, reliability requirement high,
It it is the core function unit realizing alterating and direct current conversion.
Possessing high operational reliability in order to ensure high voltage dc transmission thyristor valve, thyristor valve is in examination of dispatching from the factory
Test, in the case of operation maintenance and abnormal failure, be required for thyristor valve equipment is carried out high-pressure series all pressure property
Can test.Guarantee in thyristor valve running, do not have due to the voltage's distribiuting of thyristor valve uneven and
The situation of IGCT punch through damage occurs.Generally, the brilliant lock of a direct current transportation thyristor valve assembly
Pipe progression is 13～15 grades, and whole thyristor valve assembly above earth potential is 26～30kV effective values, that
, the voltage at each IGCT level two ends be power-frequency voltage virtual value be 2kV, each IGCT level two ends
Voltage is higher, but at present when carrying out thyristor valve and all pressing performance test, be all voltage the highest in the case of,
This has gap with the voltage under IGCT actual operating mode, thus causes all pressure test result and practical situation
There is the biggest difference.
Utility model content
The purpose of this utility model is to provide a kind of direct current transportation Thyristors in series and all presses performance detecting system, uses
The problem low to solve existing all pressures testing result precision.This utility model provides a kind of voltage detecting simultaneously
Device.
For achieving the above object, scheme of the present utility model includes: a kind of direct current transportation Thyristors in series is all pressed
Performance detecting system, including control part, also includes at least one current detection section, described voltage detecting
Part includes two ports for connecting corresponding IGCT two ends respectively, connects and have between said two port
Article one, string is provided with the dividing potential drop branch road of divider resistance, described dividing potential drop branch road and a portable protective gaps and is arranged in parallel, institute
The two ends stating divider resistance connect the high-pressure side of an isolating transformer, and the low-pressure side of described isolating transformer is defeated
Go out to connect described control part.
Described divider resistance and a spark gap are arranged in parallel.
Described detecting system also includes signal processing, and the low-pressure side of described isolating transformer passes through described letter
Number process part output connect described control part, described signal processing includes the low pass filtered being sequentially connected with
Wave circuit and A/D change-over circuit.
The number of described current detection section is identical with the IGCT number of series connection, and one_to_one corresponding.
The described part that controls is control chip DSP.
Described detecting system also includes that host computer, described control part are connected with described upper machine communication.
A kind of voltage check device, including two ports for connecting corresponding IGCT two ends respectively, described
The dividing potential drop branch road having a string to be provided with divider resistance, described dividing potential drop branch road and a guarantor is connected between two ports
Protecting gap to be arranged in parallel, the two ends of described divider resistance connect the high-pressure side of an isolating transformer, described every
Low-pressure side from transformator is the outfan of described voltage check device.
Described divider resistance and a spark gap are arranged in parallel.
The direct current transportation Thyristors in series that this utility model provides all is pressed in performance detecting system, by this detection is
System is directly connected on the two ends being under practical operation situation or simulating the IGCT under practical operation situation, institute
IGCT voltage under actual operating mode can be detected, it is ensured that the verity of detection and essence with this system
Degree.Owing to the voltage at the two ends of IGCT is the highest, so this performance detecting system is provided with portable protective gaps,
Dividing potential drop branch road can be carried out overvoltage protection by this portable protective gaps, it is to avoid dividing potential drop branch road bears excessive electricity
Pressure, prevents the dividing potential drop branch road when detecting voltage from damaging because of overvoltage；Further, by the blood pressure lowering of isolating transformer,
Being low-voltage by high voltage drop, and export to controlling part, control part can be entered according to this low voltage signal
Row correspondingly processes, all to press test, it is ensured that all press the exploitativeness of test.So, this system
Significant to all pressures performance of inspection direct current transportation thyristor valve.
Accompanying drawing explanation
Fig. 1 is current detection section structural representation；
Fig. 2 is the annexation signal that direct current transportation Thyristors in series all presses performance detecting system and IGCT
Figure；
Fig. 3 is the principle schematic that direct current transportation Thyristors in series all presses performance detecting system；
Fig. 4 is low-pass filter circuit figure；
Fig. 5 is dsp software structural representation；
Fig. 6 is DSP main program flow schematic diagram；
Fig. 7 is data acquisition routines schematic flow sheet.
Detailed description of the invention
The utility model is described in more detail below in conjunction with the accompanying drawings.
Direct current transportation thyristor valve tandem all presses performance detecting system embodiment
Inverter includes that a plurality of Thyristors in series circuit, every Thyristors in series circuit can become IGCT
Valve section, on every series circuit, string is provided with multiple IGCT, is used for promoting bearing on every series circuit
Voltage.In order to detect the voltage that each IGCT two ends in Thyristors in series circuit are born, finally realize inspection
Surveying all pressures performance of each IGCT, this utility model provides a kind of direct current transportation thyristor valve tandem and all presses
Performance detecting system.
This direct current transportation thyristor valve tandem all presses performance detecting system to generally comprise three parts, is electricity respectively
Pressure detection part, signal processing and control part.
The number of the current detection section in this system is at least one, wherein, when system only includes an electricity
Pressure test section timesharing, this detecting system is merely able to detect an IGCT every time, so, if needed string
When all of IGCT on line road detects, it is necessary to carry out repeated detection；When including multiple voltage
Test section timesharing, can carry out the detection of multiple IGCT every time, and, if the voltage inspection in this system
The number surveying part is identical with the number of the IGCT on series circuit to be measured, then, each voltage detecting
Part one IGCT of the most corresponding detection, so, only carrying out one-time detection can be by series circuit to be measured
The voltage at all of IGCT two ends all detect.
As it is shown in figure 1, current detection section (also referred to as voltage check device) includes two ports, X1
And X2, the two port, for connecting the two ends of corresponding IGCT respectively, is gathered by the two port
Voltage with detection IGCT two ends.Connect between the two port and have an AC resistance potentiometer, specifically
Being the string dividing potential drop branch road that is provided with divider resistance, on this dividing potential drop branch road, string is provided with resistance R1 and resistance R2,
Wherein resistance R2 is divider resistance.AC resistance potentiometer measures IGCT two by port x 1 and X2
The high voltage U of endX1X2, then obtain high voltage signal U on the divider resistance R2 from potentiometerY1Y2.Two
Individual ac voltage meets:Numerical relation, wherein, set R1 be high-voltage arm electricity
Resistance, R2 is low-voltage arm resistance value.Brilliant lock is not affected in order to reduce the access of AC resistance potentiometer as far as possible
All pressures performance of pipe, it is desirable to the resistance on AC resistance potentiometer is much larger than the resistance R of IGCTVT, i.e.
R1+R2 ＞ ＞ RVT。
It is also associated with a portable protective gaps, i.e. this portable protective gaps between port x 1 and X2 to divide with AC resistance
Depressor is arranged in parallel, and the effect of this portable protective gaps is that protective resistance potentiometer is not subject to overvoltage, between this protection
The level of protection of gap is chosen according to the breakdown characteristics of the air gap.This portable protective gaps is existing device, so,
No longer its structure and operation principle are described in detail.
In order to realize protection further, the two ends of the divider resistance R2 in AC resistance potentiometer are parallel with one
Individual spark gap, the level of protection of this spark gap is chosen according to the actual parameter of divider resistance R2, uses
The circuit protecting divider resistance and rear end is not subject to overvoltage.It addition, whole circuit insulation against ground.
And, in order to the high voltage signal on divider resistance R2 is converted to low voltage signal, meet follow-up
Controlling to need, this current detection section also includes an isolating transformer, and the two ends of divider resistance R2 are respectively
The two ends of connection transformer high-pressure side (former limit), this step down side (secondary) is this voltage detecting
The outfan of part.High voltage signal can be converted into low voltage signal by this isolating transformer.Former and deputy limit
Between only have magnetic relation, there is no electrical communication, it is achieved be effectively isolated.
As in figure 2 it is shown, signal processing (also referred to as signal processing system) is for defeated to isolating transformer
The voltage signal gone out processes, and uses for follow-up control part.Isolating transformer original edge voltage is with dividing
The voltage U at the divider resistance R2 two ends on depressorY1Y2Coupling, secondary voltage is with the input electricity of signal processing
Pressure coupling.
As it is shown on figure 3, signal processing includes low-pass filter circuit and the A/D change-over circuit being sequentially connected with.
After the most low-pass filtered circuit of voltage signal of isolating transformer output and the process of A/D change-over circuit
To corresponding digital signal, it is then fed in control part.
In the present embodiment, a kind of detailed description of the invention of low-pass filter circuit and A/D change-over circuit is given.
Low-pass filter circuit substantially a kind of frequency selective device, it is possible to make useful frequency signal by and press down simultaneously
The electronic installation of unwanted frequency signal processed.Due to the burr in measured signal and high fdrequency component will affect harmonic wave survey
The effect of examination, so devising 4 rank Butterworth active low-pass filters, uses TL082 broadband double
JFET input operational amplifier composition filter circuit, wherein circuit parameter R11=5.5k Ω, R12=7.5k Ω,
R13=13k Ω, R21=13.7k Ω, R22=17.8k Ω, R23=32k Ω, C11=0.033uF,
C12=0.0047uF, C21=0.0056uF, C22=0.0047uF, physical circuit is as shown in Figure 4.
The requisite circuit of data acquisition is A/D change-over circuit, and the principle of A/D conversion is exactly will simulation
Signal passes sequentially through sampling, keep, quantify and encode several process after be converted into digital quantity form.ADS8515
It it is a complete 16-bit sampling A/D converter of TI company release.The peripheral circuit of ADS8515
Simply, only need to configure several filter capacitor and reference capacitance, and chip internal has sampling and keeps dress
Put, sampled voltage can be kept to A/D EOC.ADS8515 conduct is selected when circuit design
The AD conversion chip of 15 IGCT level power frequency ac voltage signals.
After A/D change-over circuit, obtain corresponding digital signal send in control part (being not drawn in figure),
In the present embodiment, in order to coordinate A/D change-over circuit, controlling part is control chip DSP.Control chip
DSP processes according to the voltage data received and analyzes, and obtains the voltage at IGCT two ends, then enters
Row all presses the detection of performance.
In the present embodiment, this detecting system also includes that host computer, host computer are connected with control chip DSP communication,
Realize uploading of data message and issuing of control signal.So, control time, control chip DSP according to
The instruction of host computer, completes corresponding function, according to the voltage data automatic decision thyristor high-voltage collected
Series average-voltage performance, and give host computer voltage data and judged result and show.
In the present embodiment, the hardware components of control chip DSP uses TIX to produce
TMS320F2812.This chip is a kind of high performance digital signal process that TI company aims at that control field is released
Chip, belongs to fixed DSP.2812DSP has 32 precision, its maximum data processing speed up to
150MIPS, and have abundant On-Chip peripheral so that it is it is more suitable for control field, for design based on digital
Control system provides a kind of ideal scheme.The minimum system circuit of DSP include power circuit, clock circuit,
Reset circuit.
The software section of control chip then includes program design and function subprogram design, as shown in Figure 5.
Wherein, for DSP mastery routine:
The software design of DSP uses modular design method, therefore in the design mastery routine primarily to
Call each subroutine module, allow orderly being operated of each subprogram.
After DSP powers on, first system is carried out Initialize installation, including: arrange DSP mode of operation,
Initialize each to control depositor, arrange house dog initial value and the mode of operation of clock, set I/O mouth
Input/output state.After system initialization terminates, program just enters wait host computer instruction phase, receives
After the instruction that host computer is sent, perform dependent instruction, carry out exchanging A/D sampling, and data are stored in slow
Depositing, concurrently deliver stream voltage data, Fig. 6 is DSP main program flow chart.
For data acquisition routines:
Data acquisition routines mainly controls A/D chip by DSP and completes analog digital conversion, and will turn
The data changed are deposited to buffer area, transmit data to facilitate to host computer.The A/D core of native system AC sampling
Sheet is ADS8515, selects intervalometer to set the sampling interval, on the basis of determining the sampling interval, passes through
Interruption carries out synchronized sampling, and native system uses deviation cumulative increment Synchronos method, therefore in timing
When disconnecting the beginning, first reset time counter value and calculate next timing value.Carry out according to the instruction that host computer is sent
Alternating voltage A/D samples, and is deposited in corresponding buffer area, and juxtaposition bit data gathers stop bits, etc.
Time host computer sends instructions and takes data away.If direct current A/D sampling, directly read direct current A/D conversion
Data are stored in buffer area after reading terminates by value, and juxtaposition bit data gathers end mark position, waits upper
Machine sends instructions and takes data away, and Fig. 7 is data acquisition routines flow chart.
And, the communication modes between control chip DSP and host computer uses half-duplex operation mode, at this
The referred to as communication mode of answer-mode, i.e. control chip DSP performs corresponding actions according to host computer instruction.
Communication Programming is also adopted by modularized design, comprises three modules in the design: serial ports initialization subroutine
Module, transmission character subroutine module and reception character subroutine module, serial ports initialization subroutine is mainly
Serial ports is configured.
It addition, wired mode can be used between control chip DSP and host computer to carry out communication, it is also possible to adopt
Communication, such as 4G wireless communication module is carried out with wireless communication module.
Although the above-mentioned design to the software program in control chip DSP is illustrated, however it is necessary that
Illustrate is that inventive point of the present utility model is hardware configuration, does not lies in software program, so, this practicality
The novel design being not limited to above-mentioned software program, in the case of using other kinds of controller, soft
The specific design of part program is it is possible to meeting is different.
Utilize this detecting system can be to the Thyristors in series circuit (i.e. thyristor valve) containing multiple IGCTs
Carry out high-pressure series and all pressed performance test, as a example by 15 IGCTs, contain 15 IGCTs at this
Valve section two ends apply power frequency ac voltage 30.0kV, then utilize detecting system to examine each IGCT
Survey, judge direct current transportation thyristor high-voltage series average-voltage performance according to the voltage at each IGCT two ends.
Voltage check device embodiment
The present embodiment provides a kind of voltage check device, and this device can be used in above-mentioned IGCT and all press test,
Other voltage acquisition and detection field can also be used in, due to this voltage check device concrete structure and
Work process has had been described in detail in said system embodiment, the most no longer illustrates.
It is presented above specific embodiment, but this utility model is not limited to described embodiment.
Basic ideas of the present utility model are above-mentioned basic scheme, for those of ordinary skill in the art, according to
Teaching of the present utility model, designs the model of various deformation, formula, parameter are not required to spend creativeness
Work.The change that in the case of without departing from principle of the present utility model and spirit, embodiment carried out, repair
Change, replace and modification still falls within protection domain of the present utility model.
Claims (8)
1. direct current transportation Thyristors in series all presses a performance detecting system, including control part, and its feature
It is, also includes that at least one current detection section, described current detection section include for connecting respectively right
Answer two ports at IGCT two ends, connect between said two port and have a string to be provided with dividing of divider resistance
Pressing branch road, described dividing potential drop branch road and a portable protective gaps are arranged in parallel, and the two ends of described divider resistance connect one
The high-pressure side of individual isolating transformer, the low-pressure side output of described isolating transformer connects described control part.
Direct current transportation Thyristors in series the most according to claim 1 all presses performance detecting system, and it is special
Levying and be, described divider resistance and a spark gap are arranged in parallel.
Direct current transportation Thyristors in series the most according to claim 1 all presses performance detecting system, and it is special
Levying and be, described detecting system also includes that signal processing, the low-pressure side of described isolating transformer pass through institute
Stating signal processing output and connect described control part, it is low that described signal processing includes being sequentially connected with
Bandpass filter circuit and A/D change-over circuit.
Direct current transportation Thyristors in series the most according to claim 1 all presses performance detecting system, and it is special
Levying and be, the number of described current detection section is identical with the IGCT number of series connection, and one_to_one corresponding.
Direct current transportation Thyristors in series the most according to claim 1 all presses performance detecting system, and it is special
Levying and be, the described part that controls is control chip DSP.
Direct current transportation Thyristors in series the most according to claim 1 all presses performance detecting system, and it is special
Levying and be, described detecting system also includes that host computer, described control part are connected with described upper machine communication.
7. a voltage check device, it is characterised in that include for connecting corresponding IGCT two ends respectively
Two ports, connect between said two port and have a string to be provided with the dividing potential drop branch road of divider resistance, described
Dividing potential drop branch road and a portable protective gaps are arranged in parallel, and the two ends of described divider resistance connect an isolating transformer
High-pressure side, the low-pressure side of described isolating transformer is the outfan of described voltage check device.
Voltage check device the most according to claim 7, it is characterised in that described divider resistance with
One spark gap is arranged in parallel.
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| CN201620496694.7U CN205786995U (en) | 2016-05-26 | 2016-05-26 | Direct current transportation Thyristors in series all presses performance detecting system and voltage check device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444620A (en) * | 2019-01-02 | 2019-03-08 | 国家电网有限公司 | DC converter valve intelligence partial pressure compensation detection system |
| CN110763970A (en) * | 2019-09-19 | 2020-02-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing breakover voltage of protection thyristor of MMC power module |
| CN110988645A (en) * | 2019-12-20 | 2020-04-10 | 西安西电电力系统有限公司 | Thyristor level voltage-sharing test method and device |
| CN116224043A (en) * | 2023-05-04 | 2023-06-06 | 晶艺半导体有限公司 | Chip voltage equalizing test system |
-
2016
- 2016-05-26 CN CN201620496694.7U patent/CN205786995U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444620A (en) * | 2019-01-02 | 2019-03-08 | 国家电网有限公司 | DC converter valve intelligence partial pressure compensation detection system |
| CN110763970A (en) * | 2019-09-19 | 2020-02-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing breakover voltage of protection thyristor of MMC power module |
| CN110763970B (en) * | 2019-09-19 | 2021-06-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing breakover voltage of protection thyristor of MMC power module |
| CN110988645A (en) * | 2019-12-20 | 2020-04-10 | 西安西电电力系统有限公司 | Thyristor level voltage-sharing test method and device |
| CN116224043A (en) * | 2023-05-04 | 2023-06-06 | 晶艺半导体有限公司 | Chip voltage equalizing test system |
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