CN201935987U - Synthetic test loop for direct current (DC) switch test - Google Patents
Synthetic test loop for direct current (DC) switch test Download PDFInfo
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- CN201935987U CN201935987U CN2010206771715U CN201020677171U CN201935987U CN 201935987 U CN201935987 U CN 201935987U CN 2010206771715 U CN2010206771715 U CN 2010206771715U CN 201020677171 U CN201020677171 U CN 201020677171U CN 201935987 U CN201935987 U CN 201935987U
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- magnetic potentiometer
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Abstract
The utility model relates to a synthetic test loop for a direct current (DC) switch test, which comprises a current source, a voltage source, a first auxiliary switch, a second auxiliary switch, a first magnetic potentiometer and a second magnetic potentiometer. An output end of the voltage source is connected with a DC switch to be tested and a series circuit of the first magnetic potentiometer in parallel, and the low potential of the first magnetic potentiometer is connected with the ground; the first auxiliary switch, the second auxiliary switch and the second magnetic potentiometer are connected in series and then connected with the DC switch to be tested and the series circuit of the first magnetic potentiometer in parallel; and the part between the first auxiliary switch and the second auxiliary switch is connected to a high potential end output by the current source, and the second magnetic potentiometer is connected to the low potential of an output end of the current source. In the utility model, the synthetic test loop of the DC switch is realized by using the spare current source, the voltage source and related experimental circuits; under the condition of ensuring steady operation of a test item, the test loop has a simple structure and adopts an equivalent substitution mode, and the investment on a laboratory is effectively saved by using a low-frequency oscillation loop to substitute a DC current.
Description
Technical field
The invention belongs to direct current transportation with high voltage direct current switch test technical field, relate to the test loop that a kind of dc switch break performance detects, especially a kind of dc switch that is applied to cut-offs or change the synthetic test loop that DC current is tested.
Background technology
Dc circuit breaker is one of visual plant of extra-high voltage direct-current transmission engineering current conversion station, and it mainly acts on is the method for operation that changes straight-flow system, or removes the fault that DC side occurs, and promptly when system breaks down, cut-offs or changes DC current with dc switch.In order to prove that dc switch has this ability, in the laboratory with verifying its break performance.
The test loop that the dc switch break performance detects is the loop of analog DC switch actual operating mode in system, test current can be obtained through rectification by electrical network or generator, owing to will bear high voltage behind the dc switch dropout current, the voltage of direct supply must meet the requirements of magnitude of voltage, therefore will build up such test loop, investment is very large.
The laboratory generally can not adopt this method to build the test loop, but tests with the higher alternate test loop of equivalence.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of synthetic test loop that is used for the dc switch test is provided, the mode that substitutes of equal value is adopted in this test loop, effectively substitutes the huge test loop of existing investment, and experimentation cost is reduced.
The objective of the invention is to solve by the following technical programs:
This kind is used for the synthetic test loop of dc switch test, comprises current source and voltage source, also includes first and second auxiliary switch, first and second magnetic potentiometer; The output terminal of described voltage source is parallel with the series circuit of the dc switch and first magnetic potentiometer, the electronegative potential ground connection of described first magnetic potentiometer; Described first and second auxiliary switch and second magnetic potentiometer series connection back are in parallel with the series circuit of the dc switch and first magnetic potentiometer; Be connected to the hot end of current source output between described first and second auxiliary switch, described second magnetic potentiometer is connected on the electronegative potential of current source output terminal.
Above-mentioned current source is made up of low-frequency oscillation loop, combined floodgate switch, lightning arrester, protection ball; The output terminal in described low-frequency oscillation loop and combined floodgate switch and lightning arrester connect into the loop, and described protection ball one end is connected on by the combined floodgate switch on the noble potential of low-frequency oscillation loop output terminal, the other end ground connection of protection ball; The two ends of described lightning arrester are the output terminal of current source.
Above-mentioned voltage source includes capacitor, frequency modulation electric capacity, frequency modulation resistance, reactor and the ignition pill that is connected into the loop successively, also is connected with an end of RC divider between described frequency modulation resistance and the reactor, described RC divider other end ground connection; The series circuit two ends of described frequency modulation electric capacity and frequency modulation resistance are voltage output terminal.
The utility model has been realized the synthetic test loop of dc switch with standby current source and voltage source and relevant experimental circuit, this test loop is under can the situation of warranty test project steady operation, not only simple in structure, and adopted alternative mode of equal value, by using the low-frequency oscillation loop to replace direct supply, it has effectively saved the laboratory investment.
Description of drawings
Fig. 1 is a synthetic test loop schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
The synthetic test loop embodiment is referring to shown in Figure 1, and this synthetic test loop that is used for the dc switch test comprises current source, voltage source, first and second auxiliary switch FK1, FK2 and first and second magnetic potentiometer CT1, CT2.Wherein the output terminal of voltage source is parallel with the series circuit of the dc switch SP and the first magnetic potentiometer CT1, the electronegative potential ground connection of the first magnetic potentiometer CT1; First and second auxiliary switch FK1, FK2 and second magnetic potentiometer CT2 series connection back are in parallel with the series circuit of the dc switch SP and the first magnetic potentiometer CT1; Be connected to the hot end of current source output between first and second auxiliary switch FK1, the FK2, the second magnetic potentiometer CT2 is connected on the electronegative potential of current source output terminal.
Current source of the present utility model is made up of low-frequency oscillation loop, combined floodgate switch HK, lightning arrester P, protection ball DQ1.Wherein the output terminal in low-frequency oscillation loop and combined floodgate switch HK and lightning arrester P connect into the loop, and protection ball DQ1 one end is connected on the noble potential of low-frequency oscillation loop output terminal by combined floodgate switch HK, the other end ground connection of protection ball DQ1; The two ends of lightning arrester P are the output terminal of current source.
Voltage source of the present utility model includes capacitor C, the frequency modulation capacitor C that is connected into the loop successively
0, the frequency modulation resistance R
0, reactor L and ignition pill DQ2, the frequency modulation resistance R
0And also be connected with the end of RC divider U, RC divider U other end ground connection between the reactor L; The frequency modulation capacitor C
0With the frequency modulation resistance R
0The series circuit two ends be voltage output terminal.
The course of work of the present utility model below is described:
Synthetic test of the present utility model only carries out synthetic test to the main fracture of dc switch, is not with auxiliary oscillation circuit.Each switch and each loop action sequence are as follows:
1) original state: voltage circuit main capacitor C pre-charge; The second auxiliary switch FK2 is in gate-dividing state, and the first auxiliary switch FK1, dc switch SP are in "on" position.
2) reach ratings time-division dc switch SP as test current I1.
3) almost divide when putting in place at dc switch SP fracture and (determine) according to straightway testing, close the second auxiliary switch FK2, divide the first auxiliary switch FK1, while trigger point fireball DQ2 sparking distance, when the electric current on the dc switch SP is reduced to zero, dc switch SP cut-offs, and recovery voltage is added on the dc switch SP simultaneously.
Claims (3)
1. a synthetic test loop that is used for dc switch test comprises current source and voltage source, it is characterized in that: also include first and second, auxiliary switch (FK1, FK2), first and second magnetic potentiometer (CT1, CT2); The output terminal of described voltage source is parallel with the series circuit of dc switch (SP) and first magnetic potentiometer (CT1), the electronegative potential ground connection of described first magnetic potentiometer (CT1); Described first and second auxiliary switch (FK1, FK2) and second magnetic potentiometer (CT2) series connection back are in parallel with the series circuit of dc switch (SP) and first magnetic potentiometer (CT1); Be connected to the hot end of current source output between described first and second auxiliary switch (FK1, FK2), described second magnetic potentiometer (CT2) is connected on the electronegative potential of current source output terminal.
2. the synthetic test loop that is used for the dc switch test according to claim 1 is characterized in that: described current source is made up of low-frequency oscillation loop, combined floodgate switch (HK), lightning arrester (P), protection ball (DQ1); The output terminal in described low-frequency oscillation loop and combined floodgate switch (HK) and lightning arrester (P) connect into the loop, and described protection ball (DQ1) end is connected on the noble potential of low-frequency oscillation loop output terminal by combined floodgate switch (HK), the other end ground connection of protection ball (DQ1); The two ends of described lightning arrester (P) are the output terminal of current source.
3. the synthetic test loop that is used for the dc switch test according to claim 1, it is characterized in that: described voltage source includes capacitor (C), the frequency modulation electric capacity (C that is connected into the loop successively
0), frequency modulation resistance (R
0), reactor (L) and ignition pill (DQ2), described frequency modulation resistance (R
0) and reactor (L) between also be connected with an end of RC divider (U), described RC divider (U) other end ground connection; Described frequency modulation electric capacity (C
0) and frequency modulation resistance (R
0) the series circuit two ends be voltage output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206771715U CN201935987U (en) | 2010-12-23 | 2010-12-23 | Synthetic test loop for direct current (DC) switch test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206771715U CN201935987U (en) | 2010-12-23 | 2010-12-23 | Synthetic test loop for direct current (DC) switch test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201935987U true CN201935987U (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206771715U Expired - Lifetime CN201935987U (en) | 2010-12-23 | 2010-12-23 | Synthetic test loop for direct current (DC) switch test |
Country Status (1)
| Country | Link |
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| CN (1) | CN201935987U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344911A (en) * | 2013-07-11 | 2013-10-09 | 武汉大学 | Method for identifying states of overall process of high-voltage direct-current switch disconnection |
| CN104535923A (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | Testing circuit and method for detecting breaking performance of DC circuit breaker |
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 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 | A kind of DC high-speed switch direct current sky fills current breaking test method |
-
2010
- 2010-12-23 CN CN2010206771715U patent/CN201935987U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344911A (en) * | 2013-07-11 | 2013-10-09 | 武汉大学 | Method for identifying states of overall process of high-voltage direct-current switch disconnection |
| CN103344911B (en) * | 2013-07-11 | 2015-12-23 | 武汉大学 | A kind of high-voltage direct-current switch disconnection overall process state identification method |
| CN104535923A (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | Testing circuit and method for detecting breaking performance of DC circuit breaker |
| CN104535923B (en) * | 2014-12-27 | 2017-10-31 | 中国西电电气股份有限公司 | A kind of test loop detected for dc circuit breaker break performance and test method |
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 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 | A kind of DC high-speed switch direct current sky fills current breaking test method |
| CN110376515B (en) * | 2019-07-10 | 2021-11-23 | 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 | DC high-speed switch DC air charging current on-off 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: 20110817 |
|
| CX01 | Expiry of patent term |