CN203414508U - Parallel-connection operation structure of double-circuit voltage divider - Google Patents
Parallel-connection operation structure of double-circuit voltage divider Download PDFInfo
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- CN203414508U CN203414508U CN201320573630.9U CN201320573630U CN203414508U CN 203414508 U CN203414508 U CN 203414508U CN 201320573630 U CN201320573630 U CN 201320573630U CN 203414508 U CN203414508 U CN 203414508U
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Abstract
The utility model discloses a parallel-connection operation structure of a double-circuit voltage divider. The parallel-connection operation structure comprises a first voltage divider, a second voltage divider and ten photoelectric conversion modules which are used for respectively transmitting signals to three direct-current protection systems, two pole-A control systems, two pole-B control systems, two direct-current filter protection systems and a harmonic monitor; the first voltage divider and the second voltage divider are hung onto a high-voltage direct-current tubular bus in parallel connection, one or two of the three direct-current protection systems are connected with the first voltage divider, and the rest direct-current protection system is connected with the second voltage divider; the two pole-A control systems, the two pole-B control systems and the two direct-current filter protection systems are respectively connected with the first voltage divider and the second voltage divider, and the harmonic monitor is connected with the first voltage divider or the second voltage divider. By adopting the parallel-connection operation structure, the stable operation of the high-voltage direct-current circuit engineering can be guaranteed.
Description
Technical field
The utility model relates to high voltage dc transmission technology field, particularly a kind of double-circuit voltage divider parallel running structure of HVDC (High Voltage Direct Current) transmission system.
Background technology
Divider is the device that DC high voltage is measured; its information of voltage by measurement sends to control protective unit; this information of voltage is one of numerous electric signal amounts (voltage, electric current) of controlling protection system collection, participates in realizing the control and protection of high voltage direct current transmission project.
Please refer to shown in Fig. 1, the voltage divider arrangement of existing many high voltage direct current transmission project circuits is to adopt a minute hydraulic circuit 50 and a capacitance-resistance loop 60, wherein, divide hydraulic circuit 50 to be connected on high voltage direct current pipe mother 70, adopt the voltage of capacitance-resistance loop hydraulic circuit 50 collections in 60 pairs of minutes to carry out rough handling, then by a plurality of photoelectric conversion modules 80, realizing that same voltage after capacitance-resistance loop 60 is processed is converted to independently light signal amount and gives respectively corresponding control protective unit (is this utmost point three cover DC protection systems here, bipolar two cover utmost point control systems, this utmost point two overlaps DC filter protection systems) and a harmonic wave monitor monitoring for harmonic wave.Owing to only having a voltage divider arrangement in existing structure; and work as any one photoelectric conversion module, go wrong; will affect the measurement of whole voltage; thereby affect the measurement of the line voltage distribution amount of other direct current protectings, utmost point control system and DC filter; the operations such as frequent switching of the frequent adjusting of change of current variation joint and alternating current filter will be caused, when serious, utmost point locking will be caused.
Utility model content
The purpose of this utility model is to solve the above-mentioned voltage divider arrangement of changing and causes that change of current variation joint is frequent to be regulated and the problem such as the frequent switching of alternating current filter, utmost point locking, a kind of double-circuit voltage divider parallel running structure is provided, it is dispensed to two voltage dividers by line voltage distribution measuring amount by strategy, it is frequent that the interior change of current of can avoiding standing becomes tap-c hange control, AC filter continual on-off, the situation of utmost point locking even, ensure the stable operation of DC transmission engineering.
For realizing above object, the technical scheme that the utility model is taked is:
A voltage divider parallel running structure, ten photoelectric conversion modules that it comprises the first voltage divider, the second voltage divider and respectively signal is delivered to three DC protection systems, two utmost point 1 utmost point control systems, two utmost point 2 utmost point control systems, two DC filter protection systems and a harmonic wave monitor; Described the first voltage divider and the second voltage divider parallel connection are hung on the high voltage direct current pipe mother of same DC line outlet, one of them in described three DC protection systems or two are connected with the first voltage divider by photoelectric conversion module, and remaining DC protection system is connected with the second voltage divider by photoelectric conversion module; Described two utmost points, 1 utmost point control system is connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively, and described two utmost points, 2 utmost point control systems are connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively; Described two DC filter protection systems are connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively, and described harmonic wave monitor is connected with the first voltage divider or the second voltage divider by photoelectric conversion module.
Described the first voltage divider comprises first minute hydraulic circuit and the first capacitance-resistance loop, the second voltage divider comprises second minute hydraulic circuit and the second capacitance-resistance loop, described first minute hydraulic circuit, within second minute, hydraulic circuit includes the first electric capacity, the second electric capacity, the first resistance, the second resistance, wherein, it is female that an end after the first resistance and the first Capacitance parallel connection is connected to high voltage direct current pipe, the other end is connected to the one end after the second resistance and the second Capacitance parallel connection, other end ground connection after the second resistance and the second Capacitance parallel connection, described the first capacitance-resistance loop is connected between first resistance and the second resistance of first minute hydraulic circuit, described the second capacitance-resistance loop is connected between first resistance and the second resistance of second minute hydraulic circuit.
Described three DC protection systems are respectively the first DC protection system, the second DC protection system and the 3rd DC protection system; wherein the first DC protection system is connected with the first capacitance-resistance loop by photoelectric conversion module respectively with the 3rd DC protection system, and the second DC protection system is connected with the second capacitance-resistance loop by photoelectric conversion module.
Described two utmost points, 1 utmost point control system is respectively the first utmost point 1 utmost point control system and the second utmost point 1 utmost point control system, described the first utmost point 1 utmost point control system is connected with the first capacitance-resistance loop by photoelectric conversion module, and the second utmost point 1 utmost point control system is connected with the second capacitance-resistance loop by photoelectric conversion module.
Described two utmost points, 2 utmost point control systems are respectively the first utmost point 2 utmost point control systems and the second utmost point 2 utmost point control systems, described the first utmost point 2 utmost point control systems are connected with the first capacitance-resistance loop by photoelectric conversion module, and the second utmost point 2 utmost point control systems are connected with the second capacitance-resistance loop by photoelectric conversion module.
Described two DC filter protection systems are respectively the first DC filter protection system and the second DC filter protection system; described the first DC filter protection system is connected with the first capacitance-resistance loop by photoelectric conversion module, and the second DC filter protection system is connected with the second capacitance-resistance loop by photoelectric conversion module.
The photoelectric conversion module being connected with three DC protection systems, two utmost point 1 utmost point control systems, two utmost point 2 utmost point control systems, two DC filter protection systems is respectively OPTODYN module, and the photoelectric conversion module being connected with harmonic wave monitor is EPOS module.
The utility model compared with prior art, its advantage having is: this structure can effectively solve the many current separate unit DC line of DC transmission engineering voltage dividers and measure the potential safety hazard that fault is brought, avoid occurring that the change of current becomes tap-c hange control frequent, the situation of AC filter continual on-off, utmost point locking when serious.The structure of two DC line voltage divider parallel running can be dispensed to two voltage dividers by strategy by the line voltage distribution measuring amount of utmost point control, direct current protecting and Siemens's DC filter protection, has avoided separate unit voltage divider to measure fault and has caused utmost point locking.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing voltage divider;
Fig. 2 is the schematic diagram of the utility model double-circuit voltage divider parallel running structure.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment
The utility model hangs over the parallel connection of two circuit voltage dividers on the high voltage direct current pipe mother of DC line outlet; ten photoelectric conversion modules on former voltage divider are dispensed on two voltage dividers by strategy; the line voltage distribution amount that wherein should guarantee bipolar two cover utmost point control systems and the three cover DC protection system collections of this utmost point should be taken from different voltage dividers, guarantees that separate unit circuit voltage divider occurs measuring fault and can not cause utmost point locking.Specifically please refer to shown in Fig. 2.
A voltage divider parallel running structure, it comprises voltage divider 10, voltage divider 20 and 10 photoelectric conversion modules signal being delivered to respectively to three DC protection systems, two utmost point 1 utmost point control systems, two utmost point 2 utmost point control systems, two DC filter protection systems, a harmonic wave monitor.
In the utility model preferred embodiment; three DC protection systems are respectively DC protection system 41, DC protection system 42, DC protection system 43; two utmost point 1 utmost point control systems are respectively the utmost point 1 utmost point control system 44, the utmost point 1 utmost point control system 45; two utmost point 2 utmost point control systems are respectively the utmost point 2 utmost point control systems 46,47, two DC filter protection systems of the utmost point 2 utmost point control systems are respectively DC filter protection system 48, DC filter protection system 49.Wherein, DC protection system 41, DC protection system 43, the utmost point 1 utmost point control system 44, the utmost point 2 utmost point control systems 46 and DC filter protection system 48 are respectively by photoelectric conversion module 31, photoelectric conversion module 33, photoelectric conversion module 34, photoelectric conversion module 36, photoelectric conversion module 38 is connected to capacitance-resistance loop 12, DC protection system 42, the utmost point 1 utmost point control system 45, the utmost point 2 utmost point control systems 47, DC filter protection system 49 and harmonic wave monitor 40 are respectively by photoelectric conversion module 32, photoelectric conversion module 35, photoelectric conversion module 37, photoelectric conversion module 39, photoelectric conversion module 30 is connected to capacitance-resistance loop 22.
When a voltage divider wherein occur to be measured fault; fault is measured in direct current protecting monitoring; will the corresponding measuring amount of locking and defencive function; and utmost point control system is only considered primary system; therefore can be set to primary system through the normal utmost point control of simple process measurements system, or utmost point control gathers in the situation that voltage comes from normal measurement and can not process, the interior change of current change tap-c hange control of can avoiding standing is frequent; AC filter continual on-off, the situation of utmost point locking even, ensure the stable operation of DC transmission engineering.
The above embodiment has only expressed optimal design of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with claims.
Claims (7)
1. a double-circuit voltage divider parallel running structure, it is characterized in that ten photoelectric conversion modules that it comprises the first voltage divider, the second voltage divider and respectively signal is delivered to three DC protection systems, two utmost point 1 utmost point control systems, two utmost point 2 utmost point control systems, two DC filter protection systems and a harmonic wave monitor; Described the first voltage divider and the second voltage divider parallel connection are hung on the high voltage direct current pipe mother of same DC line outlet, one of them in described three DC protection systems or two are connected with the first voltage divider by photoelectric conversion module, and remaining DC protection system is connected with the second voltage divider by photoelectric conversion module; Described two utmost points, 1 utmost point control system is connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively, and described two utmost points, 2 utmost point control systems are connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively; Described two DC filter protection systems are connected with the second voltage divider with the first voltage divider by photoelectric conversion module respectively, and described harmonic wave monitor is connected with the first voltage divider or the second voltage divider by photoelectric conversion module.
2. double-circuit voltage divider parallel running structure according to claim 1, it is characterized in that, described the first voltage divider comprises first minute hydraulic circuit and the first capacitance-resistance loop, the second voltage divider comprises second minute hydraulic circuit and the second capacitance-resistance loop, described first minute hydraulic circuit, within second minute, hydraulic circuit includes the first electric capacity, the second electric capacity, the first resistance, the second resistance, wherein, it is female that an end after the first resistance and the first Capacitance parallel connection is connected to high voltage direct current pipe, the other end is connected to the one end after the second resistance and the second Capacitance parallel connection, other end ground connection after the second resistance and the second Capacitance parallel connection, described the first capacitance-resistance loop is connected between first resistance and the second resistance of first minute hydraulic circuit, described the second capacitance-resistance loop is connected between first resistance and the second resistance of second minute hydraulic circuit.
3. double-circuit voltage divider parallel running structure according to claim 2; it is characterized in that; described three DC protection systems are respectively the first DC protection system, the second DC protection system and the 3rd DC protection system; wherein the first DC protection system is connected with the first capacitance-resistance loop by photoelectric conversion module respectively with the 3rd DC protection system, and the second DC protection system is connected with the second capacitance-resistance loop by photoelectric conversion module.
4. double-circuit voltage divider parallel running structure according to claim 2, it is characterized in that, described two utmost points, 1 utmost point control system is respectively the first utmost point 1 utmost point control system and the second utmost point 1 utmost point control system, described the first utmost point 1 utmost point control system is connected with the first capacitance-resistance loop by photoelectric conversion module, and the second utmost point 1 utmost point control system is connected with the second capacitance-resistance loop by photoelectric conversion module.
5. double-circuit voltage divider parallel running structure according to claim 2, it is characterized in that, described two utmost points, 2 utmost point control systems are respectively the first utmost point 2 utmost point control systems and the second utmost point 2 utmost point control systems, described the first utmost point 2 utmost point control systems are connected with the first capacitance-resistance loop by photoelectric conversion module, and the second utmost point 2 utmost point control systems are connected with the second capacitance-resistance loop by photoelectric conversion module.
6. double-circuit voltage divider parallel running structure according to claim 2; it is characterized in that; described two DC filter protection systems are respectively the first DC filter protection system and the second DC filter protection system; described the first DC filter protection system is connected with the first capacitance-resistance loop by photoelectric conversion module, and the second DC filter protection system is connected with the second capacitance-resistance loop by photoelectric conversion module.
7. according to the double-circuit voltage divider parallel running structure described in claim 1-6 any one; it is characterized in that; the photoelectric conversion module being connected with three DC protection systems, two utmost point 1 utmost point control systems, two utmost point 2 utmost point control systems, two DC filter protection systems is respectively OPTODYN module, and the photoelectric conversion module being connected with harmonic wave monitor is EPOS module.
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| CN201320573630.9U CN203414508U (en) | 2013-09-16 | 2013-09-16 | Parallel-connection operation structure of double-circuit voltage divider |
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| CN201320573630.9U CN203414508U (en) | 2013-09-16 | 2013-09-16 | Parallel-connection operation structure of double-circuit voltage divider |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764915A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Electronic type voltage transformer based on capacitor and resistance-capacitance voltage divider parallel connection |
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
-
2013
- 2013-09-16 CN CN201320573630.9U patent/CN203414508U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764915A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Electronic type voltage transformer based on capacitor and resistance-capacitance voltage divider parallel connection |
| CN104764915B (en) * | 2015-03-16 | 2018-01-16 | 中国计量学院 | Based on the electric capacity electronic type voltage transformer in parallel with RC divider |
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20140916 |
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| EXPY | Termination of patent right or utility model |