CN201383762Y - Current power for operation test of high-voltage and direct-current transmission thyristor valve - Google Patents
Current power for operation test of high-voltage and direct-current transmission thyristor valve Download PDFInfo
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- CN201383762Y CN201383762Y CN200920032557U CN200920032557U CN201383762Y CN 201383762 Y CN201383762 Y CN 201383762Y CN 200920032557 U CN200920032557 U CN 200920032557U CN 200920032557 U CN200920032557 U CN 200920032557U CN 201383762 Y CN201383762 Y CN 201383762Y
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- rectifier bridge
- converter transformer
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Abstract
The utility model discloses a current source used for the operation test of a high-voltage and direct-current transmission thyristor valve, and belongs to the field of electric test of high-voltage and direct-current transmission thyristor valves. The utility model is characterized in that the current source comprises a direct current resistor, a smoothing reactor, a Y/delta converter transformer and a Y/Y converter transformer, wherein primary sides of the Y/delta converter transformer and the Y/Y converter transformer are connected on an electric network; a secondary side of the Y/delta converter transformer is connected with a first 6P rectifier bridge, and a secondary side of the Y/Y converter transformer is connected with a second 6P rectifier bridge; the first 6P rectifier bridge, the second 6P rectifier bridge, the smoothing reactor and the direct current resistor are in series connected in sequence to form a main circuit; and a bridge arm of the second 6P rectifier bridge is formed by the series connection of an isolating valve and a thyristor valve.
Description
Technical field
The utility model relates to the electrical test field of high voltage direct current transmission converter valve, particularly a kind of high voltage direct current transmission thyristor converter valve operating test current source.
Background technology
Along with the development of electric power system high voltage direct current transmission project, the converter valve of high-power thyristor device series connection is the core of DC transmission engineering current conversion station, and its cost generally accounts for about 25% of total investment of engineering, and its quality directly influences the reliability of power transmission and transformation system.
In the DC transmission engineering, generally about 15 °, if come the design experiment current source according to actual engineering operation condition, so needed active power is very big for converter valve operation pilot angle.At present, current source is used in test, generally uses direct test mode back-to-back, uses the short circuit test generator powered, and the voltage on valve side height of current source converter transformer requires place capacity big.
Summary of the invention
The purpose of this utility model is to provide a kind of high voltage direct current transmission thyristor converter valve operating test current source, and its output voltage is low, and place capacity is little.
For reaching above purpose, the present invention takes following technical scheme to be achieved.A kind of high voltage direct current transmission thyristor converter valve operating test current source, it is characterized in that, comprise: D.C. resistance, smoothing reactor, primary side is connected in parallel on Y/ Δ converter transformer and the Y/Y converter transformer on the electrical network, secondary side joint the one 6P rectifier bridge of Y/ Δ converter transformer, secondary side joint the 2nd 6P rectifier bridge of Y/Y converter transformer; A described 6P rectifier bridge, the 2nd 6P rectifier bridge, smoothing reactor, D.C. resistance are connected successively, form major loop; A brachium pontis of described the 2nd 6P rectifier bridge is in series by isolating valve and test product valve.
Characteristics of the present utility model are:
The pilot angle of described first and second 6P rectifier bridge is 80 °～85 °; The Optimal Control angle is 83.5 °.
The power of described D.C. resistance is 0.1～0.5MW.
In the such scheme, current source with distribution network as power supply, adopt high trigger angle rectifier operations, output DC stream is big and direct voltage is very low, fully improved the utilance of converter transformer voltage on valve side, thereby reduced the capacity requirement of converter transformer and reactive power compensation, reduced active loss, saved occupation area of equipment and investment.
Description of drawings
Fig. 1 is for adopting the circuit structure diagram of high voltage direct current transmission thyristor converter valve operating test of the present utility model.Among the figure, T1:Y/ Δ converter transformer; The T2:Y/Y converter transformer; B1: a 6P rectifier bridge 1; B2: the 2nd 6P rectifier bridge 2; L1: smoothing reactor; Va1: isolating valve; Vt: test product valve; R: D.C. resistance.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and example.
With reference to Fig. 1, high voltage direct current transmission thyristor converter valve operating test current source, mainly comprise: Y/ Δ converter transformer T1, Y/Y converter transformer T2, and a 6P rectifier bridge B1, the 2nd 6P rectifier bridge B2, D.C. resistance R, the smoothing reactor L1 that are composed in series major loop successively.The primary side of Y/ Δ converter transformer T1 and Y/Y converter transformer T2 is connected in parallel on respectively on the electrical network, and its secondary side connects a 6P rectifier bridge B1, the 2nd 6P rectifier bridge B2 respectively.The brachium pontis of the 2nd 6P rectifier bridge B2 is in series by isolating valve Va1 and test product valve Vt, the two ends of test product valve Vt also are connected to voltage source, Control current source and voltage source carry out mating reaction to test product valve Vt, realize high voltage direct current transmission thyristor converter valve operating test purpose.
In the direct current transportation actual condition, electric current start from scratch rise to rated value or reduce to zero from rated value before, interrupted situation can appear.At this moment, because electric current is interrupted, the converter valve two ends can produce overvoltage, and valve is impacted.In the type approval test interrupted current system be exactly proof electric current produce interrupted in, the normal and converter valve of the function of the protection triggering system of converter valve has enough tolerances to the direct current interrupted current.Converter valve is generally 4 at the maximum number of the current impulse of each cycle of direct current transportation run duration, thus for the actual condition equivalence, two 6P bridges series connection are adopted in the current source loop.
Current source is the low-voltage and high-current of valve side by converter transformer with the power distribution network power conversion, by the big direct current of two 6P rectification outputs.The current source loop adopts the zero energy mode to move, and controls the size of direct current by regulating trigger angle α, and trigger angle approaches 90 °.Can make voltage on valve side help test product as much as possible get energy like this, thereby reduce the capacity needs of converter transformer greatly, and make the meritorious demand of current source lower.
Current source has adopted the high angle operational mode, and main purpose is in order to test can under minimum voltage maximum test products like this.According to the comprehensive Design in loop, can select suitable D.C. resistance R for use, guarantee the sensitivity that loop current is regulated and reduce the meritorious consumption in current source loop as far as possible.
The current source that with the capacity is 10.2MW is the pilot angle of 6P rectifier bridge in example explanation the utility model and the selection of D.C. resistance.Capacity is in the current source of 10.2MW, the voltage on valve side U of 6P rectifier bridge
l=1000V, the output voltage of current source are U
d, output current I
d=3600A, output impedance is R
d, the short-circuit impedance X of 5.1MW converter transformer
d=29.5m Ω is according to formula
The output impedance that calculating can get current source is R
dBe about 12m Ω.
At present, the control ability of control system generally can be accurate to about 5 μ s (this is comprising coming out from control system through converter valve bottom cabinet, valve high potential plate at last to time of gate circuit transistor gate), the electrical degree of this time correspondence is roughly 0.1 degree, every variation 0.1 degree can cause the variation of synthesis loop electric current 50A, and this also is the tolerance limit to test.
By calculating and test, the typical data that the minimum precision electric current of the heating power of pilot angle, D.C. resistance size, D.C. resistance and reflection control index changes is as shown in the table.
| Pilot angle | D.C. resistance Rm Ω | Thermal power MW | Minimum precision electric current changes A |
| 85 | 9.1 | 0.12 | 75 |
| 83.5 | 28.6 | 0.37 | 55 |
| 80 | 74 | 0.96 | 36 |
| 75 | 137.8 | 1.79 | 24 |
| 50 | 425.8 | 5.52 | 7.5 |
Can see that from table when pilot angle is 85 when spending, D.C. resistance minimum, thermal power are also minimum, but current change quantity has reached 75A, like this to control system stable, to the requirement height of Current Control precision.When pilot angle 83.5, thermal power has reached 0.37MW, but per 0.1 electrical degree causes that current change quantity is 55A, and this current change quantity can meet the demands, and caloric value also can be accepted.When current angle reaches 80 degree when following, D.C. resistance caloric value at this time increases greatly, and is all unfavorable to testing economy and loop construction.In view of from actual motion, pilot angle is when 83.5 spend, and combination property is best.Simultaneously, because D.C. resistance needs for a long time at work through excessive electric current, caloric value is very big, and D.C. resistance power generally selects for use 0.1～0.5MW both economical, can be by air-cooled solution heat dissipation problem.
Claims (4)
1, a kind of high voltage direct current transmission thyristor converter valve operating test current source, it is characterized in that, comprise: D.C. resistance, smoothing reactor, primary side is connected in parallel on Y/ Δ converter transformer and the Y/Y converter transformer on the electrical network, secondary side joint the one 6P rectifier bridge of Y/ Δ converter transformer, secondary side joint the 2nd 6P rectifier bridge of Y/Y converter transformer; A described 6P rectifier bridge, the 2nd 6P rectifier bridge, smoothing reactor, D.C. resistance are connected successively, form major loop; A brachium pontis of described the 2nd 6P rectifier bridge is in series by isolating valve and test product valve.
2, a kind of high voltage direct current transmission thyristor converter valve operating test current source according to claim 1 is characterized in that the pilot angle of described first and second 6P rectifier bridge is 80 °～85 °.
3, a kind of high voltage direct current transmission thyristor converter valve operating test current source according to claim 2 is characterized in that, the pilot angle of described first and second 6P rectifier bridge is for being 83.5 °.
4, a kind of high voltage direct current transmission thyristor converter valve operating test current source according to claim 1 is characterized in that the power of described D.C. resistance is 0.1～0.5MW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920032557U CN201383762Y (en) | 2009-04-13 | 2009-04-13 | Current power for operation test of high-voltage and direct-current transmission thyristor valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920032557U CN201383762Y (en) | 2009-04-13 | 2009-04-13 | Current power for operation test of high-voltage and direct-current transmission thyristor valve |
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| CN201383762Y true CN201383762Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920032557U Expired - Lifetime CN201383762Y (en) | 2009-04-13 | 2009-04-13 | Current power for operation test of high-voltage and direct-current transmission thyristor valve |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937057A (en) * | 2010-08-30 | 2011-01-05 | 中国西电电气股份有限公司 | Synthesis loop for running test of converter valve for direct current power transmission project |
| CN101937058A (en) * | 2010-08-30 | 2011-01-05 | 中国西电电气股份有限公司 | Device and method for testing multi-wave fault current testing device in converter valve operating test |
| CN101951173A (en) * | 2010-08-30 | 2011-01-19 | 中国西电电气股份有限公司 | Double six-pulse wave bridge arm parallel current source for use in DC transmission thyristor valve service test |
| CN101958638A (en) * | 2010-09-20 | 2011-01-26 | 中国电力科学研究院 | Novel method for implementing current interruption protection of direct-current converter valve thyristor |
| CN102023242A (en) * | 2010-12-27 | 2011-04-20 | 许继集团有限公司 | Current source for test of high voltage direct current transmission commutation valve and synthesis test method of current source |
| CN103076471A (en) * | 2012-11-29 | 2013-05-01 | 许继集团有限公司 | Large current source for running test of direct-current transmission converter valve and compensation method thereof |
| CN103336155A (en) * | 2013-06-28 | 2013-10-02 | 中国西电电气股份有限公司 | Current source for function test of DC high-voltage transmission thyristor converter valve component |
| CN105044503A (en) * | 2015-07-06 | 2015-11-11 | 南京南瑞继保电气有限公司 | Synthetic test loop starting method |
| CN107315119A (en) * | 2017-06-21 | 2017-11-03 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of extreme high voltage converter transformer valve group is taken out stitches and test method |
-
2009
- 2009-04-13 CN CN200920032557U patent/CN201383762Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937057A (en) * | 2010-08-30 | 2011-01-05 | 中国西电电气股份有限公司 | Synthesis loop for running test of converter valve for direct current power transmission project |
| CN101937058A (en) * | 2010-08-30 | 2011-01-05 | 中国西电电气股份有限公司 | Device and method for testing multi-wave fault current testing device in converter valve operating test |
| CN101951173A (en) * | 2010-08-30 | 2011-01-19 | 中国西电电气股份有限公司 | Double six-pulse wave bridge arm parallel current source for use in DC transmission thyristor valve service test |
| CN101951173B (en) * | 2010-08-30 | 2012-07-25 | 中国西电电气股份有限公司 | Double six-pulse wave bridge arm parallel current source for use in DC transmission thyristor valve service test |
| CN101937057B (en) * | 2010-08-30 | 2012-10-10 | 中国西电电气股份有限公司 | Synthesis loop for running test of converter valve for direct current power transmission project |
| CN101937058B (en) * | 2010-08-30 | 2013-07-24 | 中国西电电气股份有限公司 | Device and method for testing multi-wave fault current testing device in converter valve operating test |
| CN101958638A (en) * | 2010-09-20 | 2011-01-26 | 中国电力科学研究院 | Novel method for implementing current interruption protection of direct-current converter valve thyristor |
| CN101958638B (en) * | 2010-09-20 | 2014-07-02 | 中国电力科学研究院 | Novel method for implementing current interruption protection of direct-current converter valve thyristor |
| CN102023242B (en) * | 2010-12-27 | 2013-05-22 | 许继集团有限公司 | Current source for test of high voltage direct current transmission commutation valve and synthesis test method of current source |
| CN102023242A (en) * | 2010-12-27 | 2011-04-20 | 许继集团有限公司 | Current source for test of high voltage direct current transmission commutation valve and synthesis test method of current source |
| CN103076471A (en) * | 2012-11-29 | 2013-05-01 | 许继集团有限公司 | Large current source for running test of direct-current transmission converter valve and compensation method thereof |
| CN103076471B (en) * | 2012-11-29 | 2015-11-11 | 许继电气股份有限公司 | A kind of direct-current transmission converter valve running test big current source and compensation method thereof |
| CN103336155A (en) * | 2013-06-28 | 2013-10-02 | 中国西电电气股份有限公司 | Current source for function test of DC high-voltage transmission thyristor converter valve component |
| CN105044503A (en) * | 2015-07-06 | 2015-11-11 | 南京南瑞继保电气有限公司 | Synthetic test loop starting method |
| CN105044503B (en) * | 2015-07-06 | 2018-01-09 | 南京南瑞继保电气有限公司 | Synthetic test loop starts method |
| CN107315119A (en) * | 2017-06-21 | 2017-11-03 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of extreme high voltage converter transformer valve group is taken out stitches and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100113 |
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| CX01 | Expiry of patent term |