CN203133210U - DC low-voltage protection simulator - Google Patents
DC low-voltage protection simulator Download PDFInfo
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- CN203133210U CN203133210U CN 201320155174 CN201320155174U CN203133210U CN 203133210 U CN203133210 U CN 203133210U CN 201320155174 CN201320155174 CN 201320155174 CN 201320155174 U CN201320155174 U CN 201320155174U CN 203133210 U CN203133210 U CN 203133210U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 20
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- 238000004088 simulation Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 8
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Abstract
The utility model provides a DC low-voltage protection simulator belonging to the field of electrical measurement and especially relates to a DC low-voltage protection simulation testing device used for simulation study of a DC control protection system of a high-voltage DC power transmission device. A DC voltage signal terminal is connected to one input terminal of a first AND gate through an arithmetic operation element and a first Schmitt trigger successively. The other input terminal of the first AND gate is connected to a rectification state signal terminal. An output terminal of the first AND gate is connected to one input terminal of a second AND gate through a first timer. The other input terminal of the second AND gate is connected to a local-electrode operation state signal terminal. An output terminal of the second AND gate is connected to a first OR gate through a second timer. An output terminal of the first OR gate is connected to a DC low-voltage protection signal terminal of a DC low-voltage protection simulator through a third timer. The DC low-voltage protection simulator can reflect an operation status of a DC control protection device truly and provide corresponding simulation results for study or design of the DC control protection device.
Description
Technical field
The utility model belongs to the electric measurement field, relates in particular to a kind of dc low-voltage protection simulation testing device of the DC control protection system simulation research for high-voltage direct-current transmission system.
Background technology
The continuous growth of electricity needs has caused transmission system to develop to the direction of growing distance, big capacity and high stability.Along with the ultra-high voltage AC transmission engineering in each electrical network zone and the construction project of high voltage direct current transmission project constantly increase, the electrical network of power consumption concentrated area presents the extra-high voltage alternating current-direct current series-parallel connection receiving end electrical network feature of tangible many direct currents feed-in, electric network composition is tight, electrical distance is tightr between many ac and dc circuits, behind extra-high voltage and the UHV (ultra-high voltage) fault in ac transmission system, easily cause and comprise high voltage direct current at many interior direct currents while commutation failures, and its rejuvenation of the commutation failure of many times direct currents will produce greater impact to AC system, if the recovery policy mismate of each straight-flow system, then also might cause many direct currents that continuous commutation failure takes place simultaneously, even cause the direct current locking.Many times bipolar locking takes place in direct current simultaneously, and a large amount of trends shift or on a large scale with the initiating system stable problem.Reciprocation between this ac and dc systems brings huge challenge for the safe operation of extra-high voltage alternating current-direct current series-parallel connection receiving end electrical network.
Therefore, in research or the design phase of high voltage direct current transmission project, must test and emulation for the stability of extra-high voltage alternating current-direct current series-parallel connection receiving end electrical network to the reciprocation between ac and dc systems, and with reference to test and simulation result, result to research or design verifies, the stability of system is assessed.China's utility model patent " a kind of many feed-ins DC transmission system real-timedigital simulation model " (utility model patent number: ZL201210532559.X Granted publication number: CN102945004A) disclose many feed-ins DC transmission system real-timedigital simulation model, it comprises the equivalent super high voltage direct current electricity transmission system of a plurality of parallel connections, and described super high voltage direct current electricity transmission system comprises primary system real-timedigital simulation model and electrical secondary system real-timedigital simulation model; Described primary system real-timedigital simulation model comprises current conversion station and DC power transmission line, and described current conversion station is arranged on the two ends of DC power transmission line; Described electrical secondary system real-timedigital simulation model comprises current conversion station control system and protection system, and described current conversion station control system is connected with current conversion station with protection system, is used for the operation of control and protection current conversion station.By control and the protection to the current conversion station operation of current conversion station control system and protection system, avoid easily causing behind the fault in ac transmission system impact that many times direct current simultaneous faultss and many times direct current faults and rejuvenation thereof produce AC system.But this realistic model does not relate to the emulation of dc low-voltage protection, truly the dc low-voltage of simulated high-pressure direct current transportation DC control protection system protection running status.
The utility model content
The purpose of this utility model is that a kind of dc low-voltage protection simulator will be provided; it can simulate the dc low-voltage guard mode of reflection D.C. high voltage transmission DC control protection system truly; for the dc low-voltage of DC control protective device protection research or design provide corresponding simulation result, solve the technical matters that dc low-voltage protection research or design for the DC control protective device provide verification platform.
The utility model solves the problems of the technologies described above the technical scheme that adopts:
A kind of dc low-voltage protection simulator is connected in the dc system protection unit of DC control protection system, is used for the emulation of the DC control protection system of high-voltage direct-current transmission system, it is characterized in that:
Described dc low-voltage protection simulator comprises current trigger angle judge module, the arithmetical operation element, first this schmitt trigger, first with door, second with door, first to the 3rd timer and first or door;
The d. c. voltage signal end is successively by arithmetical operation element and first this schmitt trigger, be connected to first with an input end of door; First with the door another input end, be connected to the rectification state signal end; First with the door output terminal, by first timer be connected to second with the door an input end; Second with the door another input end, be connected to this utmost point operating state signal end;
Second with the door output terminal, by second timer be connected to first or the door an input end; Current trigger angle judge module be connected to first or the door another input end; First or the output terminal of door, by the 3rd timer, be connected to the dc low-voltage guard signal end of described dc low-voltage protection simulator.
A kind of preferable technical scheme of dc low-voltage of the present utility model protection simulator is characterized in that current trigger angle judge module comprises inertance element, second this schmitt trigger, the 3rd this schmitt trigger, the 3rd to the 5th with door and the 4th timer; Trigger angle command signal end successively by inertance element and second this schmitt trigger, be connected to the 3rd with an input end of door; The 3rd with the door another input end be connected to this utmost point operating state signal end; The 3rd with the door output terminal, be connected to the 4th with the door an input end; Neutral current signal end the 3rd this schmitt trigger, be connected to the 5th with the door an input end; The 5th with the door another input end, be connected to the rectification state signal end; The 5th with the door output terminal, be connected to the 4th with the door another input end; The 4th with the door output terminal, by the 4th timer be connected to first or the door another input end.
The beneficial effects of the utility model are:
1. the dc low-voltage protection running status of DC control protective device can be simulated, be reflected to dc low-voltage of the present utility model protection simulator truly, for research or the design of DC control protective device provides corresponding simulation result;
2. dc low-voltage protection simulator of the present utility model has the advantage of cross-platform emulation testing, both can realize with actual components in true environment, can realize with computer software in virtual environment again;
Description of drawings
Fig. 1 is the theory diagram for the simulator of DC control protection system;
Fig. 2 is the circuit theory diagrams of dc low-voltage protection simulator of the present utility model.
The label of each parts among the above figure: 100-high-voltage direct-current transmission system; 110-alternating current filter switching device; the 120-converter power transformer; 130-thyristor converter device; the 200-control module; 210-angle, current/voltage reference value calculation element; 220-transverter trigger angle control device; 230-trigger pulse generation device, 240-change of current variation apparatus for controlling connection, 250-utmost point output control device; the 260-overload control apparatus; 270-Reactive Power Control device, 300-dc system protection unit, 900-operation control workstation.3010-current trigger angle judge module; 3011-arithmetical operation element; 3021～3023-, first to the 3rd this schmitt trigger; 3031～3035-first to the 5th and door; 3041～3044-, first to fourth timer; 3051-first or door; the 3061-inertance element; UD_PU-d. c. voltage signal end; IDNC_PU-neutral current signal end, ALPHA_ORD-triggers angle command signal end, this utmost point of OPN-operating state signal end; RECT-rectification state signal end, UVP_BLOCK-dc low-voltage guard signal end.
Embodiment
In order to understand technique scheme of the present utility model better, be explained in further detail below in conjunction with drawings and Examples.
Fig. 2 has showed an embodiment of dc low-voltage protection simulator of the present utility model, is connected in the dc system protection unit 300 of DC control protection system, is used for the emulation of the DC control protection system of high-voltage direct-current transmission system.One of basic functional units of the dc system protection unit 300 that dc low-voltage protection simulator of the present utility model is the DC control protection system.The simulator of the DC control protection system of high-voltage direct-current transmission system as shown in Figure 1.
As shown in Figure 2, dc low-voltage protection simulator of the present utility model comprises current trigger angle judge module 3010, arithmetical operation element 3011, first this schmitt trigger 3021, first with the door 3031, the second with the door 3032, the first to the 3rd timers 3041～3043 and first or the door 3051;
D. c. voltage signal end UD_PU is successively by arithmetical operation element 3011 and first this schmitt trigger 3021, be connected to first with an input end of door 3031; First with door another input end of 3031, be connected to rectification state signal end RECT; First with door 3031 output terminal, by first timer 3041 be connected to second with an input end of door 3032; Second with door another input end of 3032, be connected to this utmost point operating state signal end OPN;
Second with door 3032 output terminal, be connected to first or an input end of door 3051 by second timer 3042; Current trigger angle judge module 3010 is connected to first or door another input end of 3051; First or door 3051 output terminal, by the 3rd timer 3043, be connected to the dc low-voltage guard signal end UVP_BLOCK of the utility model dc low-voltage protection simulator.
The current trigger angle judge module 3010 of dc low-voltage protection simulator of the present utility model is illustrated in the frame of broken lines of Fig. 2, comprise inertance element 3061, second these schmitt trigger 3022, the three these schmitt triggers the 3023, the three to the 5th and door the 3033～3035 and the 4th timer 3044; Trigger angle command signal end ALPHA_ORD successively by inertance element 3061 and second this schmitt trigger 3022, be connected to the 3rd with an input end of door 3033; The 3rd is connected to this utmost point operating state signal end OPN with door another input end of 3033; The 3rd with door 3033 output terminal, be connected to the 4th with an input end of door 3034; Neutral current signal end IDNC_PU the 3rd this schmitt trigger 3023, be connected to the 5th with a door input end of 3035; The 5th with door another input end of 3035, be connected to rectification state signal end RECT; The 5th with door 3035 output terminal, be connected to the 4th with another input end of door 3034; The 4th with door 3034 output terminal, be connected to first or another input end of door 3051 by the 4th timer 3044.
The criterion of dc low-voltage protection:
UDL＜0.5pu, 4s locking transverter, perhaps
The rectification side triggers angle ALPHA＞60 °, and neutral current IDNC＞0.5pu, 500ms locking transverter.
Those of ordinary skill in the art will be appreciated that; above embodiment illustrates the technical solution of the utility model; and be not to be used as restriction of the present utility model; any variation, modification of the above embodiment being done based on connotation of the present utility model all will drop in the protection domain of claim of the present utility model.
Claims (2)
1. a dc low-voltage protection simulator is connected in the dc system protection unit of DC control protection system, is used for the emulation of the DC control protection system of high-voltage direct-current transmission system, it is characterized in that:
Described dc low-voltage protection simulator comprises current trigger angle judge module, the arithmetical operation element, first this schmitt trigger, first with door, second with door, first to the 3rd timer and first or door;
The d. c. voltage signal end is successively by arithmetical operation element and first this schmitt trigger, be connected to first with an input end of door; First with the door another input end, be connected to the rectification state signal end; First with the door output terminal, by first timer be connected to second with the door an input end; Second with the door another input end, be connected to this utmost point operating state signal end;
Second with the door output terminal, by second timer be connected to first or the door an input end; Current trigger angle judge module be connected to first or the door another input end; First or the output terminal of door, by the 3rd timer, be connected to the dc low-voltage guard signal end of described dc low-voltage protection simulator.
2. dc low-voltage according to claim 1 protection simulator is characterized in that current trigger angle judge module comprises inertance element, second this schmitt trigger, the 3rd this schmitt trigger, the 3rd to the 5th with door and the 4th timer; Trigger angle command signal end successively by inertance element and second this schmitt trigger, be connected to the 3rd with an input end of door; The 3rd with the door another input end be connected to this utmost point operating state signal end; The 3rd with the door output terminal, be connected to the 4th with the door an input end; Neutral current signal end the 3rd this schmitt trigger, be connected to the 5th with the door an input end; The 5th with the door another input end, be connected to the rectification state signal end; The 5th with the door output terminal, be connected to the 4th with the door another input end; The 4th with the door output terminal, by the 4th timer be connected to first or the door another input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155174 CN203133210U (en) | 2013-03-29 | 2013-03-29 | DC low-voltage protection simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155174 CN203133210U (en) | 2013-03-29 | 2013-03-29 | DC low-voltage protection simulator |
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| Publication Number | Publication Date |
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| CN203133210U true CN203133210U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320155174 Expired - Lifetime CN203133210U (en) | 2013-03-29 | 2013-03-29 | DC low-voltage protection simulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257288A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Direct current under voltage protection simulating device |
-
2013
- 2013-03-29 CN CN 201320155174 patent/CN203133210U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257288A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Direct current under voltage protection simulating device |
| CN103257288B (en) * | 2013-03-29 | 2015-08-19 | 国家电网公司 | A kind of DC low-voltage protection simulation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20150819 |
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| RGAV | Abandon patent right to avoid regrant |