CN107860994B - Offshore full-power water-cooling converter test platform - Google Patents
Offshore full-power water-cooling converter test platform Download PDFInfo
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- CN107860994B CN107860994B CN201710984248.XA CN201710984248A CN107860994B CN 107860994 B CN107860994 B CN 107860994B CN 201710984248 A CN201710984248 A CN 201710984248A CN 107860994 B CN107860994 B CN 107860994B
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Abstract
The invention discloses an offshore full-power water-cooled converter test platform which comprises a tested converter host and a tested converter slave, wherein the test platform comprises a power grid side branch, an aging test branch, a drag test branch, a motor side branch and a power supply control branch; the first alternating current power supply is connected with a power grid side branch, one side of the power grid side branch is communicated with a tested converter host, the other side of the power grid side branch is respectively communicated with an aging test branch and a drag test branch, the aging test branch and the drag test branch are respectively communicated with a motor side branch, and the drag test branch is communicated with a tested converter slave; and the second alternating current power supply is connected with a power supply control branch, and the power supply control branch is respectively communicated with a power supply of a tested converter control system and a power supply of a water cooling equipment control system. The invention has lower capital consumption, replaces a full-power motor set with matching equipment such as a transformer and the like, can carry out multiple tests on the offshore wind power full-power water-cooling converter, enhances the test effect and reduces the research and development cost.
Description
Technical Field
The invention relates to the technical field of converter test platforms, in particular to an offshore full-power water-cooling converter test platform.
Background
With the continuous development of the wind power industry, the market of onshore wind power full-power converters tends to be saturated, the small-power converters do not meet the current market requirements any more, and with the increase of scientific research investment of various companies, the onshore wind power full-power converter replaces the onshore wind power full-power converter with the onshore wind power full-power converter.
The offshore full-power water-cooled converter has the advantage of high power generation, and has high technical content and relatively complex test environment in the development process. The test platform in the traditional mode no longer meets the test of the offshore full-power water-cooled converter, or the test platform in the traditional mode needs to purchase a high-power motor and a high-power matching transformer again, so that the cost is huge, and the production research and development requirements cannot be met. In order to save resources and reduce the cost of the test platform, an offshore full-power water-cooling test platform needs to be designed, and the platform can be used for fully testing the offshore wind power full-power water-cooling converter and reducing the research and development cost.
Disclosure of Invention
The invention provides an offshore full-power water-cooled converter test platform for solving the technical problems.
The invention is realized according to the following technical scheme:
the invention relates to an offshore full-power water-cooled converter test platform, which comprises a tested converter host and a tested converter slave which are connected to the test platform, wherein the test platform comprises a power grid side branch, an aging test branch, a drag test branch, a motor side branch and a power supply control branch;
the first alternating current power supply is connected with a power grid side branch, one side of the power grid side branch is communicated with a tested converter host, the other side of the power grid side branch is respectively communicated with an aging test branch and a drag test branch which are connected in parallel, the aging test branch and the drag test branch which are connected in parallel are respectively communicated with a motor side branch, and the drag test branch is communicated with a tested converter slave;
and the second alternating current power supply is connected with a power supply control branch, and the power supply control branch is respectively communicated with a power supply of a tested converter control system and a power supply of a water cooling equipment control system.
The power grid side branch comprises a first circuit breaker, a sixth circuit breaker, an eighth circuit breaker, a ninth circuit breaker, a first transformer and a second transformer; the first alternating current power supply is communicated with a wire inlet end of the sixth circuit breaker, a wire outlet end of the sixth circuit breaker is respectively communicated with a wire inlet end of the eighth circuit breaker and a wire inlet end of the ninth circuit breaker through a switching copper bar, the wire outlet end of the eighth circuit breaker is communicated with a wire outlet end of the first circuit breaker, the wire outlet end of the first circuit breaker is further communicated with a power grid side of a tested converter host, the wire outlet end of the ninth circuit breaker is communicated with a wire inlet end of the second transformer, the wire outlet end of the second transformer is communicated with a wire inlet end of the first transformer, and the wire inlet end of the first transformer is further communicated with a wire inlet end of the first.
The aging test branch comprises a third circuit breaker; the wire outlet end of the first transformer is communicated with the wire inlet end of the third circuit breaker, and the wire outlet end of the third circuit breaker is communicated with the motor side branch.
The dragging test branch comprises a second circuit breaker and a fourth circuit breaker; the wire outlet end of the first transformer is communicated with the wire inlet end of the second circuit breaker, the wire outlet end of the second circuit breaker is communicated with the power grid side of the slave machine of the tested current transformer, the motor side of the slave machine of the tested current transformer is communicated with the wire outlet end of the fourth circuit breaker, and the wire inlet end of the fourth circuit breaker is communicated with the branch circuit at the motor side.
The motor side branch circuit comprises a filter reactor, a filter resistor, a filter capacitor and a fifth circuit breaker; the wire outlet end of the third circuit breaker and the wire inlet end of the fourth circuit breaker are respectively communicated with the wire inlet end of the filter reactance, the wire inlet end of the filter reactance is also communicated with the filter capacitor through the filter resistor, the wire outlet end of the filter reactance is communicated with the wire inlet end of the fifth circuit breaker, and the wire outlet end of the fifth circuit breaker is communicated with the motor side of the tested converter host.
The power supply control branch comprises a tenth circuit breaker, an eleventh circuit breaker, a twelfth circuit breaker, a thirteenth circuit breaker, a third transformer and a fourth transformer; the second alternating current power supply is respectively communicated with a wire inlet end of a tenth circuit breaker and a wire inlet end of a twelfth circuit breaker, a wire outlet end of the tenth circuit breaker is communicated with a wire inlet end of a third transformer, a wire outlet end of the third transformer is communicated with a wire inlet end of an eleventh circuit breaker, a wire outlet end of the eleventh circuit breaker is communicated with a wire inlet end of a power supply of a tested converter control system, a wire outlet end of the twelfth circuit breaker is communicated with a wire inlet end of a fourth transformer, a wire outlet end of the fourth transformer is communicated with a wire inlet end of a thirteenth circuit breaker, and a wire outlet end of the thirteenth circuit breaker is communicated with a wire inlet end of a.
The first circuit breaker, the second circuit breaker, the third circuit breaker, the fourth circuit breaker and the fifth circuit breaker are frame circuit breakers.
The sixth circuit breaker, the eighth circuit breaker, the ninth circuit breaker, the tenth circuit breaker, the eleventh circuit breaker, the twelfth circuit breaker and the thirteenth circuit breaker are molded case circuit breakers.
The first transformer is an isolation transformer, the second transformer is a charging transformer, and the third transformer and the fourth transformer are control electric transformers.
The invention has the advantages and positive effects that:
the invention has lower capital consumption, replaces a full-power motor set with matching equipment such as a transformer and the like, can carry out multiple tests on the offshore wind power full-power water-cooling converter, enhances the test effect and reduces the research and development cost.
Drawings
Fig. 1 is a circuit schematic of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in FIG. 1, the present invention employs 690V three-phase power as a first AC power and a second AC power, and 240mm long enough2Cable, 95mm2Cable and 35mm2An electrical cable.
The invention relates to an offshore full-power water-cooled converter test platform, which comprises a tested converter host and a tested converter slave which are connected to the test platform, wherein the test platform comprises a power grid side branch, an aging test branch, a drag test branch, a motor side branch and a power supply control branch;
the first alternating current power supply is connected with a power grid side branch, one side of the power grid side branch is communicated with a tested converter host, the other side of the power grid side branch is respectively communicated with an aging test branch and a drag test branch which are connected in parallel, the aging test branch and the drag test branch which are connected in parallel are respectively communicated with a motor side branch, and the drag test branch is communicated with a tested converter slave;
and the second alternating current power supply is connected with a power supply control branch, and the power supply control branch is respectively communicated with a power supply of a tested converter control system and a power supply of a water cooling equipment control system.
The power grid side branch comprises a first breaker Q1, a sixth breaker Q6, an eighth breaker Q8, a ninth breaker Q9, a first transformer T1 and a second transformer T2; the first alternating current power supply passes through 240mm2The cable is communicated with the wire inlet end of the sixth circuit breaker Q6, and the wire outlet end of the sixth circuit breaker Q6 passes through 240mm2The cable is connected to the wire inlet end of the switching copper bar, and the wire outlet end of the switching copper bar passes through 240mm2The cable is communicated with the wire inlet end of the eighth breaker Q8, and the wire outlet end of the switching copper bar is also communicated with the wire inlet end of the eighth breaker Q8 through 95mm2The cable is communicated with the wire inlet end of the ninth breaker Q9, and the wire outlet end of the eighth breaker Q8 passes through 240mm2The cable is communicated with the outlet end of the first breaker Q1, and the outlet end of the first breaker Q1 also passes through 240mm2The cable is communicated with the power grid side of the tested converter host, and the outlet end of the ninth breaker Q9 passes through 95mm2The cable is communicated with the wire inlet end of the second transformer T2, and the wire outlet end of the second transformer T2 passes through 95mm2The cable is communicated with the inlet wire end of the first transformer T1, and the inlet wire end of the first transformer T1 passes through 240mm2The cable also communicates with the inlet terminal of the first interrupter Q1.
The aging test branch comprises a third circuit breaker Q3; the outlet end of the first transformer T1 passes through 240mm2The cable is communicated with the wire inlet end of the third breaker Q3, and the wire outlet end of the third breaker Q3 passes through 240mm2The cable is communicated with the motor side branch.
The pair-pulling test branch comprises a second breaker Q2 and a fourth breaker Q4; the outlet end of the first transformer T1 passes through 240mm2The cable is communicated with the wire inlet end of the second breaker Q2, and the wire outlet end of the second breaker Q2 passes through 240mm2The cable is communicated with the power grid side of the slave machine of the converter to be tested, and the motor side of the slave machine of the converter to be tested passes through 240mm2The cable is communicated with the wire outlet end of the fourth breaker Q4, and the wire inlet end of the fourth breaker Q4 passes through 240mm2The cable is communicated with the motor side branch.
The motor side branch comprises a filter reactance L1, a filter resistor R1, a filter capacitor C1 and a fifth circuit breaker Q5; the outlet end of the third breaker Q3 and the inlet end of the fourth breaker Q4 respectively pass through 240mm2The cable is communicated with the line inlet end of the 0.12mH filter reactance L1, and the line inlet end of the filter reactance L1 also passes through 95mm2The cable is communicated with a filter capacitor C1 in an angle joint through a filter resistor R1, and the outlet end of the filter reactor L1 passes through 240mm2The cable is communicated with the wire inlet end of the fifth breaker Q5, and the wire outlet end of the fifth breaker Q5 passes through 240mm2And the cable is communicated with the motor side of the main machine of the converter to be tested.
The power supply control branch comprises a tenth breaker Q10, an eleventh breaker Q11, a twelfth breaker Q12, a thirteenth breaker Q13, a third transformer T3 and a fourth transformer T4; the second alternating current power supply passes through 240mm respectively2The cable is communicated with the wire inlet end of the tenth breaker Q10 and the wire inlet end of the twelfth breaker Q12, and the wire outlet end of the tenth breaker Q10 passes through 240mm2The cable is communicated with the wire inlet end of the third transformer T3, and the wire outlet end of the third transformer T3 passes through 35mm2The cable is communicated with the wire inlet end of the eleventh breaker Q11, and the wire outlet end of the eleventh breaker Q11 passes through 35mm2The cable is communicated with the inlet wire end of the power supply of the control system of the tested converter and the outlet wire of the twelfth breaker Q12End passing 240mm2The cable is communicated with the wire inlet end of the fourth transformer T4, and the wire outlet end of the fourth transformer T4 passes through 35mm2The cable is communicated with the wire inlet end of a thirteenth breaker Q13, and the wire outlet end of the thirteenth breaker Q13 passes through 35mm2And the cable is communicated with a wire inlet end of a water cooling equipment control system power supply.
The first breaker Q1, the second breaker Q2, the third breaker Q3, the fourth breaker Q4 and the fifth breaker Q5 are 4000A frame breakers.
The sixth breaker Q6 is a 500A molded case circuit breaker, the eighth breaker Q8 and the ninth breaker Q9 are 250A molded case circuit breakers, the tenth breaker Q10 and the twelfth breaker Q12 are 100A molded case circuit breakers, and the eleventh breaker Q11 and the thirteenth breaker Q13 are 80A molded case circuit breakers.
The first transformer T1 is a 4000KVA isolation transformer, the second transformer T2 is a 100KVA charging transformer, and the third transformer T3 and the fourth transformer T4 are 60KVA control electric transformers with a transformation ratio of 690V/400V.
When the offshore wind power full-power water-cooled converter cannot perform the full-power grid-connected test of the motor, the full-power operation test of the full-power water-cooled converter needs to be performed through the test platform. The test platform can be used for carrying out aging test on the main machine of the offshore wind power full-power water-cooled converter and carrying out drag test on the main machine and the slave machine of the full-power water-cooled converter.
When the host machine of the offshore wind power full-power water-cooled converter is subjected to aging test, the tenth breaker Q10 and the twelfth breaker Q12 are switched on, and the eleventh breaker Q11 and the thirteenth breaker Q13 are switched on, so that the control system of the host machine of the tested full-power water-cooled converter is powered on. Then, the sixth breaker Q6 is switched on, the ninth breaker Q9 is switched on, the first transformer T1 is charged through the second transformer T2, after charging is completed, the first breaker Q1, the third breaker Q3 and the fifth breaker Q5 are closed, a motor side sensor of the tested converter host detects 690V voltage, operation grid-connection testing is conducted, then the tested converter host operation power is loaded for testing, and due to the fact that the working condition motor side is power frequency voltage, hardware testing and aging testing can only be conducted on the tested converter host.
When the host machine of the offshore wind power full-power water-cooled converter is used for carrying out drag test, the tenth circuit breaker Q10 and the twelfth circuit breaker Q12 are switched on, and the eleventh circuit breaker Q11 and the thirteenth circuit breaker Q13 are switched on, so that a control system of the host machine of the tested full-power water-cooled converter is powered on. Then, the sixth circuit breaker Q6 is switched on, the ninth circuit breaker Q9 is switched on, the first transformer T1 is charged through the second transformer T2, after the charging is finished, the first circuit breaker Q1, the second circuit breaker Q2, the fourth circuit breaker Q4 and the fifth circuit breaker Q5 are closed, the slave machine of the converter to be tested becomes a dragging converter, grid-connected inversion is carried out, the current with different voltages and different frequencies obtained by the inversion of the slave machine of the converter to be tested is transmitted to the motor side of the master machine of the converter to be tested, a motor side sensor of the master machine of the converter to be tested detects the existence of the voltage, a grid-connected test is carried out, and then the running power of the master machine and the slave machine of the converter, and the tested converter master machine can also be used as a dragging converter to drag and test the tested converter slave machine, the voltage and the frequency of the motor side under the working condition can be adjusted, and various tests can be performed on the tested current transformer.
The invention has lower capital consumption, replaces a full-power motor set with matching equipment such as a transformer and the like, can carry out multiple tests on the offshore wind power full-power water-cooling converter, enhances the test effect and reduces the research and development cost.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The utility model provides an offshore full power water-cooling converter test platform, is including connecting the converter host computer of being surveyed and the converter slave computer of being surveyed on test platform which characterized in that: the test platform comprises a power grid side branch, an aging test branch, a pair dragging test branch, a motor side branch and a power supply control branch;
the power grid side circuit comprises a first circuit breaker, a sixth circuit breaker, an eighth circuit breaker, a ninth circuit breaker, a first transformer and a second transformer;
the aging test branch comprises a third circuit breaker;
the dragging test branch comprises a second circuit breaker and a fourth circuit breaker;
the motor side branch circuit comprises a filter reactor, a filter resistor, a filter capacitor and a fifth circuit breaker;
the power supply control branch comprises a tenth circuit breaker, an eleventh circuit breaker, a twelfth circuit breaker, a thirteenth circuit breaker, a third transformer and a fourth transformer;
the first alternating current power supply is connected with a power grid side branch, one side of the power grid side branch is communicated with a tested converter host, the other side of the power grid side branch is respectively communicated with an aging test branch and a drag test branch which are connected in parallel, the aging test branch and the drag test branch which are connected in parallel are respectively communicated with a motor side branch, and the drag test branch is communicated with a tested converter slave;
and the second alternating current power supply is connected with a power supply control branch, and the power supply control branch is respectively communicated with a power supply of a tested converter control system and a power supply of a water cooling equipment control system.
2. The offshore full-power water-cooled converter test platform according to claim 1, characterized in that: the first alternating current power supply of the power grid side branch circuit is communicated with a wire inlet end of a sixth circuit breaker, a wire outlet end of the sixth circuit breaker is respectively communicated with a wire inlet end of an eighth circuit breaker and a wire inlet end of a ninth circuit breaker through a switching copper bar, a wire outlet end of the eighth circuit breaker is communicated with a wire outlet end of a first circuit breaker, the wire outlet end of the first circuit breaker is further communicated with the power grid side of a tested converter host, the wire outlet end of the ninth circuit breaker is communicated with a wire inlet end of a second transformer, the wire outlet end of the second transformer is communicated with a wire inlet end of a first transformer, and the wire inlet end of the first transformer is further communicated with a wire inlet end of the first.
3. The offshore full-power water-cooled converter test platform according to claim 1, characterized in that: and the wire outlet end of the first transformer of the aging test branch circuit is communicated with the wire inlet end of the third circuit breaker, and the wire outlet end of the third circuit breaker is communicated with the motor side branch circuit.
4. The offshore full-power water-cooled converter test platform according to claim 1, characterized in that: the outlet end of the first transformer of the opposite-pulling test branch is communicated with the inlet end of the second circuit breaker, the outlet end of the second circuit breaker is communicated with the power grid side of the tested converter slave machine, the motor side of the tested converter slave machine is communicated with the outlet end of the fourth circuit breaker, and the inlet end of the fourth circuit breaker is communicated with the motor side branch.
5. The offshore full-power water-cooled converter test platform according to claim 1, characterized in that: and the wire outlet end of the third circuit breaker and the wire inlet end of the fourth circuit breaker of the motor side branch are respectively communicated with the wire inlet end of the filter reactance, the wire inlet end of the filter reactance is also communicated with the filter capacitor through the filter resistor, the wire outlet end of the filter reactance is communicated with the wire inlet end of the fifth circuit breaker, and the wire outlet end of the fifth circuit breaker is communicated with the motor side of the tested converter host.
6. The offshore full-power water-cooled converter test platform according to claim 1, characterized in that: the second alternating current power supply of the power supply control branch circuit is respectively communicated with a wire inlet end of a tenth circuit breaker and a wire inlet end of a twelfth circuit breaker, a wire outlet end of the tenth circuit breaker is communicated with a wire inlet end of a third transformer, a wire outlet end of the third transformer is communicated with a wire inlet end of an eleventh circuit breaker, a wire outlet end of the eleventh circuit breaker is communicated with a wire inlet end of a tested converter control system power supply, a wire outlet end of the twelfth circuit breaker is communicated with a wire inlet end of a fourth transformer, a wire outlet end of the fourth transformer is communicated with a wire inlet end of a thirteenth circuit breaker, and a wire outlet end of the thirteenth circuit breaker is communicated with a wire inlet end of a water.
7. The offshore full-power water-cooled converter test platform according to any one of claims 2 to 6, characterized in that: the first circuit breaker, the second circuit breaker, the third circuit breaker, the fourth circuit breaker and the fifth circuit breaker are frame circuit breakers; the sixth circuit breaker, the eighth circuit breaker, the ninth circuit breaker, the tenth circuit breaker, the eleventh circuit breaker, the twelfth circuit breaker and the thirteenth circuit breaker are molded case circuit breakers; the first transformer is an isolation transformer, the second transformer is a charging transformer, and the third transformer and the fourth transformer are control electric transformers.
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| CN201710984248.XA CN107860994B (en) | 2017-10-20 | 2017-10-20 | Offshore full-power water-cooling converter test platform |
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| CN201710984248.XA CN107860994B (en) | 2017-10-20 | 2017-10-20 | Offshore full-power water-cooling converter test platform |
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| CN107860994A CN107860994A (en) | 2018-03-30 |
| CN107860994B true CN107860994B (en) | 2020-01-14 |
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| CN111722036A (en) * | 2020-06-11 | 2020-09-29 | 天津瑞能电气有限公司 | Cascade type power module test platform |
| CN112710950B (en) * | 2020-12-15 | 2021-11-23 | 南京航空航天大学 | Open-circuit fault diagnosis method for switching tube in half-bridge submodule of MMC converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399228A (en) * | 2013-07-30 | 2013-11-20 | 苏州汇川技术有限公司 | Total power aging test circuit for current transformer or frequency transformer |
| CN203365567U (en) * | 2013-06-19 | 2013-12-25 | 许继电气股份有限公司 | Wind power generation converter test platform for simulation of wind power on-site operating conditions |
| CN105024397A (en) * | 2015-06-29 | 2015-11-04 | 国网山东省电力公司电力科学研究院 | Dynamic simulation system of offshore wind power power-transmission and grid-connected system through VSC-MTDC |
| CN105487018A (en) * | 2015-11-19 | 2016-04-13 | 北京金风科创风电设备有限公司 | Testing device, electric inverse cutting cabinet and testing system of converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9651629B2 (en) * | 2012-07-16 | 2017-05-16 | Clemson University | Hardware-in-the-loop grid simulator system and method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203365567U (en) * | 2013-06-19 | 2013-12-25 | 许继电气股份有限公司 | Wind power generation converter test platform for simulation of wind power on-site operating conditions |
| CN103399228A (en) * | 2013-07-30 | 2013-11-20 | 苏州汇川技术有限公司 | Total power aging test circuit for current transformer or frequency transformer |
| CN105024397A (en) * | 2015-06-29 | 2015-11-04 | 国网山东省电力公司电力科学研究院 | Dynamic simulation system of offshore wind power power-transmission and grid-connected system through VSC-MTDC |
| CN105487018A (en) * | 2015-11-19 | 2016-04-13 | 北京金风科创风电设备有限公司 | Testing device, electric inverse cutting cabinet and testing system of converter |
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Effective date of registration: 20230707 Address after: 300308 No. 100, Hangtian Road, Tianjin pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee after: TIANJIN RUIYUAN ELECTRICAL Co.,Ltd. Address before: No.1 Xinghua No.7 Branch Road, economic development zone, Xiqing District, Tianjin Patentee before: Tianjin Ruineng electric Co.,LTD. |
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