CN110286273A - The test circuit and method that voltage responsive is tested under thyristor current transformer rated current - Google Patents
The test circuit and method that voltage responsive is tested under thyristor current transformer rated current Download PDFInfo
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- 239000008186 active pharmaceutical agent Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
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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
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Abstract
The test circuit and method tested the invention discloses voltage responsive under a kind of thyristor current transformer rated current.The present invention applies the principle that its electric current of positive voltage rises, applies the decline of its electric current of negative voltage using current transformer, make current transformer steady-state operation under its 80% rated current first with closed-loop current control, then apply control output current of converter during full voltage carries out voltage responsive again and reach rated value, to realize the test for detecting current transformer voltage responsive characteristic under rated current.
Description
Technical field
It is electric under specifically a kind of thyristor current transformer rated current the present invention relates to thyristor current transformer the field of test technology
Press the test circuit and method of response test.
Background technique
ITER (International Thermal-Nuclear Experimental Reactor) is that current global scale is maximum, influences most far-reaching superconducting Tokamak dress
It sets.ITER poloidal field converter cell is the important subsystem of magnetic confinement fusion heap engineering, by pulse power power supply system 66kV
Bussed supply, and controllable DC voltage is transferred to poloidal field superconducting coil, for plasma breakdown and plasma
The control of electric current position shape.
Each poloidal field converter cell is made of four six pulse wave current transformers of thyristor, can carry out 12 pulse waves, four-quadrant
Operation.Each exportable rated current 27.5kA and normal band load voltage 1.05kV of six pulse waves current transformer.It is wanted according to ITER system
It asks, when the input voltage of rectifier transformer changes within the scope of 62kV~72kV, poloidal field current transformer, which should have, is being no more than 2
The symmetrical voltage response of voltage gamut variation (± 1.05kV) is realized in the time of a electricity cycle (40ms), and is required specified
The symmetrical voltage response of current transformer is detected under electric current.
In order to meet ITER requirement, it is electric again that first current closed-loop is proposed for ITER poloidal field current transformer voltage responsive test
The detection method for pressing opened loop control, runs current transformer under 0.8 times of rated current using closed-loop current control, recycles voltage
Open loop detect current transformer its full voltage range response condition, and can be realized voltage step variation during make to become
The output electric current of stream device reaches rated value.
The test method that voltage responsive is tested under a kind of thyristor current transformer rated current is to examining ITER current transformer specified
Voltage responsive characteristic under electric current is most important.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides electricity under a kind of thyristor current transformer rated current
Press the test circuit and method of response test.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
The test circuit that voltage responsive is tested under thyristor current transformer rated current, includes auto-transformer T1, open circuit
Device CB, AC isolation switch AS, earthing switch ES, rectifier transformer T2, thyristor current transformer CU to be measured, controller C, direct current
Reactor L, direct-current isolating switch DS, load Ld, the auto-transformer T1Input terminal connect 110kV power grid, self coupling transformation
The output end of device T1 passes sequentially through breaker CB, AC isolation switch AS is connected to rectifier transformer T2Input terminal, rectification become
Depressor T2Output end connection thyristor current transformer CU input terminal, the direct current reactor L, direct-current isolating switch DS and
Load LdIt is connected in series between the positive and negative output end of six pulse wave current transformer CU of thyristor, the controller C passes through analog signal
Port is connect with the control terminal of six pulse wave current transformer CU of thyristor.
The controller C requires the operation of control thyristor current transformer CU according to reference waveform.
The test method that voltage responsive is tested under a kind of thyristor current transformer rated current, comprising the following steps:
(1) closed-loop current control mode is first used, thyristor current transformer CU stable operation under its 80% rated current is enabled,
Then control mode is switched into voltage opened loop control, during voltage responsive, makes the output electricity of thyristor current transformer CU
Stream reaches its rated value；
(2) in voltage opened loop control, positive maximum voltage and negative maximum voltage each 2 times should be applied, to detect the full model of voltage
Enclose the symmetrical voltage response of variation；
(3) according to system parameter, loop parameter and the load parameter of the test circuit, voltage opened loop control is calculated
When apply positive voltage and negative voltage time, apply positive voltage time t1Electric current is exported depending on six pulse wave current transformer CU of thyristor
The time of rated current is risen to by 80% rated current, applies negative voltage time t2Depending on six pulse wave current transformer CU of thyristor
Output electric current is dropped to the time of a certain current value by rated current, applies the time t of positive voltage again3Depending on a certain electric current
Value rises to the time of rated current again, and the time for applying negative voltage again is unrestricted, thyristor current transformer CU output electricity
It flows down and drops to 0, that is, stop working；
(4) controller uses CSS operation interface, runs mould in the Set Mode window setting current transformer of CSS operation interface
Formula and its control model, wherein Combine Mode expression can current control but also voltage-controlled mixing control model；?
The Preset waveform window preset test waveform of CSS operation interface, it is preset if CB Mode is 1 expression current control
Waveform is current waveform, if CB Mode is 2 expression voltage controls, preset waveform is voltage waveform；
(5) by real time contrast's preset reference waveform, using the controlling party of voltage opened loop control after first closed-loop current control
Formula starts to test；
(6) real-time detection exports electric current IdIf t0For the time of current transformer steady-state operation under 80% rated current, setting
t0Entering steady-state operation in order to ensure current transformer and then changing closed-loop current control is that voltage open loop sky is known, carries out voltage steps
Jump response, after reaching the 80% of current transformer CU rated current, timing reaches t0Closed-loop current control is switched to voltage open loop
Control mode, first temporally t1Apply positive maximum voltage, makes to export electric current IdReach the rated current of current transformer CU；Voltage is by just
Maximum value is to negative maximum value step, and temporally t2Negative maximum voltage is maintained, makes to export electric current IdDrop to a certain current value；Electricity
Pressure is from negative maximum value to positive maximum value step, temporally t again3Positive maximum voltage is maintained, makes to export electric current IdReach current transformer CU
Rated current after；Negative maximum voltage is maintained again until current transformer CU exports electric current IdDrop to 0, stops control program fortune
Row terminates test.
The invention has the advantages that controlling current transformer stable operation under its 80% rated current before voltage responsive；Benefit
The principle for being risen with positive electricity volage current transformer electric current is applied, being applied the decline of negative electricity volage current transformer electric current carries out electricity applying full voltage
Output current of converter is controlled during pressure response and reaches rated current, and current transformer electricity is detected under rated current to realize
Press the test of response characteristic.
Detailed description of the invention
Fig. 1 is the test circuit of thyristor current transformer voltage responsive test.
Fig. 2 is the circuit topology of thyristor current transformer.
Fig. 3 is control circuit schematic diagram.
Fig. 4 is the method for the present invention flow diagram.
Fig. 5 is the operation interface of preset reference waveform.
Fig. 6 is the preset reference waveform of voltage responsive test.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, the test circuit that voltage responsive is tested under a kind of thyristor current transformer rated current, includes self coupling
Transformer T1, breaker CB, AC isolation switch AS, earthing switch ES, rectifier transformer T2, current transformer CU and its controller C,
Direct current reactor L, direct-current isolating switch DS and load Ld, the auto-transformer T1Input terminal connect 110kV power grid, it is defeated
Outlet is connected to rectifier transformer T through breaker CB and AC isolation switch AS2Input terminal, rectifier transformer T2Output end
Connect current transformer CU, the direct current reactor L, direct-current isolating switch DS and load LdBe connected in series in current transformer CU just,
Between negative output terminal.Controller C requires the operation of control thyristor current transformer CU according to reference waveform.
The auto-transformer T1Rated capacity be 100MVA, no-load voltage ratio is 110kV/80~12kV, and self coupling becomes in test
Depressor selects 110kV/62kV gear.The rectifier transformer T2Rated capacity be 41MVA, no-load voltage ratio 66kV/1.05kV.Institute
The inductance value for stating direct current reactor L is 250 μ H, and resistance value is 300 μ Ω.The load LdInductance value be 5mH, resistance value is
2.5mΩ。
The current transformer CU is the three-phase full-bridge controlled rectifier being made of thyristor as shown in Fig. 2, by 6 bridge arm structures
At each bridge arm is formed by 12 thyristor branch circuit parallel connections, and each thyristor branch is connected a fastp-acting fuse.a,b,c
For three-phase alternating current input terminal, g is control signal input, and "+" and "-" respectively represent the positive and negative output end of direct current of current transformer
Son.
The controller C uses the dsp controller (TMS320F2812) of independent research, as shown in figure 3, its input is whole
The synchronization signal of convertor transformer input voltage, 6 tunnels of output control signal is through being separately connected current transformer CU after operational amplifier
6 bridge arms thyristor control signal input g.
As shown in figure 4, the test method that voltage responsive is tested under a kind of thyristor current transformer rated current, specific steps are such as
Under:
(1) first with closed-loop current control, make current transformer CU stable operation 180ms under 22kA electric current, by control mode
Voltage opened loop control is switched to by closed-loop current control, and during full voltage response, makes the output electric current of current transformer CU
Reach 27.5kA；
(2) in voltage opened loop control, positive maximum voltage and negative maximum voltage each 2 times should be applied, to detect the full model of voltage
Enclose the symmetrical voltage response of variation.
(3) according to system parameter, loop parameter and the load parameter of the test circuit, voltage opened loop control is calculated
When apply positive voltage and negative voltage time, apply positive voltage time t1It is risen to depending on current transformer CU output electric current by 22kA
Time used in 27.5kA；Apply negative voltage time t2Dropped to needed for 15kA depending on current transformer CU output electric current as 27.5kA
Time；Apply the time t of positive voltage again3It is risen to used in 27.5kA again depending on output current of converter as 15kA
Time；Apply negative voltage again until current transformer CU output electric current drops to 0, stopping control program operation terminates test.It is based on
System parameter, loop parameter and the load of the integration testing platform of high-power electrical test center, plasma physics research institute
Parameter calculates to apply positive voltage time t for the first time1For 25ms, apply negative voltage time t for the first time2For 75ms, again plus positive electricity
Press time t3For 80ms.
(4) controller uses CSS (control system studio) operation interface, can set in CSS operation interface
Set current transformer operational mode (operational mode of Dan Qiao, parallel connection or four-quadrant), control model (current control, voltage control and
Mix control model), the pid parameter of feedback control, the information such as default test waveform, alternating current-direct current disconnecting switch state.Set
Mode window and Preset waveform window can be seen in the operation interface of CSS.
In the CSS operation interface of controller, the Ctrl Mode selection of Set Mode window jointly controls mode
(Combine Mode), in its Preset waveform window preset test waveform as shown in figure 5, the column Time (s) indicates the time
(unit is s), PresetV indicate preset value, if it is electric current (unit is A) that CB Mode, which is the 1 preset PresetV value of expression, if
CB Mode is that the 2 preset PresetV values of expression are voltage (unit is V).Test waveform is preset such as in control interface referring to Fig. 6
Shown in Fig. 5, t herein0For 180ms, t1For 25ms, t2For 75ms, t3For 80ms, 80%Idn 22000A, UmFor 1050V ,-Um
For -1050V.
(5) by real time contrast's preset reference waveform, using the controlling party of voltage opened loop control after first closed-loop current control
Formula starts to test；
(6) real-time detection exports electric current Id, when electric current reaches 22kA, start timing, timing 180ms changes closed-loop current control
For voltage opened loop control, first apply positive maximum voltage 25ms, makes to export electric current IdReach 27.5kA；Voltage is from positive maximum value to negative
Maximum value step, and negative maximum voltage 75ms is maintained, make to export electric current IdDrop to 15kA；Voltage is from negative maximum value to positive maximum
It is worth step, maintains positive maximum voltage 80ms again, makes to export electric current IdReach 27.5kA；Negative maximum voltage is maintained again until becoming
It flows device CU and exports electric current IdDrop to 0, stops control program operation, terminate test.
Claims (3)
1. the test circuit that voltage responsive is tested under thyristor current transformer rated current, it is characterised in that: include self coupling transformation
Device T1, breaker CB, AC isolation switch AS, earthing switch ES, rectifier transformer T2, thyristor current transformer CU to be measured, control
Device C, direct current reactor L, direct-current isolating switch DS, load Ld, the auto-transformer T1Input terminal connect 110 kV electricity
Net, the output end of auto-transformer T1 passes sequentially through breaker CB, AC isolation switch AS is connected to rectifier transformer T2It is defeated
Enter end, rectifier transformer T2Output end connection thyristor current transformer CU input terminal, the direct current reactor L, direct current every
It leaves and closes DS and load LdIt is connected in series between the positive and negative output end of six pulse wave current transformer CU of thyristor, the controller C
It is connect by analog signal port with the control terminal of six pulse wave current transformer CU of thyristor.
2. the test circuit that voltage responsive is tested under thyristor current transformer rated current according to claim 1, feature
Be: the controller C requires the operation of control thyristor current transformer CU according to reference waveform.
3. the test method that voltage responsive is tested under a kind of thyristor current transformer rated current, it is characterised in that: including following step
It is rapid:
(1) closed-loop current control mode is first used, enables thyristor current transformer CU stable operation under its 80% rated current, then
Control mode is switched into voltage opened loop control, during voltage responsive, reaches the output electric current of thyristor current transformer CU
To its rated value；
(2) in voltage opened loop control, positive maximum voltage and negative maximum voltage each 2 times should be applied, to detect the change of voltage gamut
The symmetrical voltage of change responds；
(3) it according to system parameter, loop parameter and the load parameter of the test circuit, is applied when calculating voltage opened loop control
Add the time of positive voltage and negative voltage, applies positive voltage time t1Depending on six pulse wave current transformer CU of thyristor export electric current by
80% rated current rises to the time of rated current, applies negative voltage time t2It is defeated depending on six pulse wave current transformer CU of thyristor
Electric current is dropped to the time of a certain current value by rated current out, applies the time t of positive voltage again3Depending on a certain current value
The time of rated current is risen to again, and the time for applying negative voltage again is unrestricted, and thyristor current transformer CU exports electric current
Drop to 0, that is, stops working；
(4) controller use CSS operation interface, CSS operation interface Set Mode window be arranged current transformer operational mode and
Its control model, wherein Combine Mode expression can current control but also voltage-controlled mixing control model；It is grasped in CSS
Make the Preset waveform window preset test waveform at interface, if CB Mode is 1 expression current control, preset waveform is
Current waveform, if CB Mode is 2 expression voltage controls, preset waveform is voltage waveform；
(5) it is opened by real time contrast's preset reference waveform using the control mode of voltage opened loop control after first closed-loop current control
Begin to test；
(6) real-time detection exports electric current IdIf t0For the time of current transformer steady-state operation under 80% rated current, t is set0For
Being to ensure that current transformer enters steady-state operation and then changes closed-loop current control is voltage opened loop control, carries out voltage step response,
After reaching the 80% of current transformer CU rated current, timing reaches t0Closed-loop current control is switched to voltage opened loop control side
Formula, first temporally t1Apply positive maximum voltage, makes to export electric current IdReach the rated current of current transformer CU；Voltage is by positive maximum value
To negative maximum value step, and temporally t2Negative maximum voltage is maintained, makes to export electric current IdDrop to a certain current value；Voltage is by bearing
Maximum value is to positive maximum value step, temporally t again3Positive maximum voltage is maintained, makes to export electric current IdReach the specified of current transformer CU
After electric current；Negative maximum voltage is maintained again until current transformer CU exports electric current IdDrop to 0, stops control program operation, terminate
Test.
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Cited By (1)
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| CN111722037A (en) * | 2020-06-11 | 2020-09-29 | 天津瑞能电气有限公司 | Single-phase cascade converter test platform |
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