CN203133504U - Overcurrent protection simulation device - Google Patents
Overcurrent protection simulation device Download PDFInfo
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- CN203133504U CN203133504U CN 201320153452 CN201320153452U CN203133504U CN 203133504 U CN203133504 U CN 203133504U CN 201320153452 CN201320153452 CN 201320153452 CN 201320153452 U CN201320153452 U CN 201320153452U CN 203133504 U CN203133504 U CN 203133504U
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- overcurrent protection
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Abstract
The utility model discloses an overcurrent protection simulation device, belonging to the electrical measurement field, in particular relates to an overcurrent protection simulation device for DC control protection system simulation research of high-voltage DC power transmission equipment. A current signal end of a current converter D and a current signal end of a current converter Y are connected to a second extreme value selector through a first extreme value selector; a current signal end of a neutral line is connected to the second extreme value selector; an output end of the second extreme value selector is connected to a maximum current signal end; the maximum current signal end is connected to an input end of a second OR gate sequentially through a fourth timer and a sixth timer; the maximum current signal end is connected to another input end of the second OR gate through a fifth timer; and an output end of the second OR gate is connected to a first overcurrent protection signal end through a seventh timer. The overcurrent protection simulation device can simulate the real, reflect the running status of HVDC control and protection device, DC control and protection device for research or design to provide the corresponding simulation results.
Description
Technical field
The utility model belongs to the electric measurement field, relates in particular to a kind of overcurrent 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 overcurrent protection, truly the overcurrent protection running status of simulated high-pressure direct current transportation DC control protection system.
The utility model content
The purpose of this utility model is that a kind of overcurrent protection simulator will be provided; it can simulate the overcurrent protection state of reflection D.C. high voltage transmission DC control protection system truly; for Research on Overcurrent Protection or the design of DC control protective device provides corresponding simulation result, solve the technical matters that Research on Overcurrent Protection 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 overcurrent 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 overcurrent protection simulator comprises the first extreme value selector switch, the secondary extremal selector switch, the 3rd this schmitt trigger, the 4th this schmitt trigger, the 4th to the 7th timer and second or the door;
Transverter D current signal end and transverter Y current signal end are connected to an input end of secondary extremal selector switch by the first extreme value selector switch, and the neutral current signal end is connected to another input end of secondary extremal selector switch; The output terminal of secondary extremal selector switch is connected to the maximum current signal end;
The maximum current signal end is successively by the 4th timer and the 6th timer, is connected to second or an input end of door; The maximum current signal end is by the 5th timer, is connected to second or another input end of door; Second or the output terminal of door by the 7th timer, be connected to the first overcurrent protection signal end.
A kind of preferable technical scheme of overcurrent protection simulator of the present utility model is characterized in that also comprising first this schmitt trigger, second this schmitt trigger, first to the 3rd timer and first or the door; The maximum current signal end is by first timer, is connected to first or an input end of door; The maximum current signal end is by second timer, is connected to first or another input end of door; First or the output terminal of door by the 3rd timer, be connected to the second overcurrent protection signal end.
The beneficial effects of the utility model are:
1. the overcurrent protection running status of DC control protective device can be simulated, be reflected to overcurrent protection simulator of the present utility model truly, for research or the design of DC control protective device provides corresponding simulation result;
2. overcurrent 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 overcurrent 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.The 3011-first extreme value selector switch; 3012-secondary extremal selector switch, 3021～3027-, first to the 7th timer, 3031～3034-, first to fourth this schmitt trigger; 3041-first or door; 3042-second or door, IDNC_PU-neutral current signal end, IVD_MAX-transverter D current signal end; IVY_MAX-transverter Y current signal end; CURRMAX-maximum current signal end, the OC_TRIP1-first overcurrent protection signal end, the OC_TRIP2-second overcurrent protection 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 overcurrent 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 overcurrent 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, overcurrent protection simulator of the present utility model comprises the first extreme value selector switch 3011, secondary extremal selector switch 3012, the three these schmitt triggers 3033, the 4th this schmitt trigger the 3034, the four to the 7th timer 3024～3027 and second or the door 3042;
Transverter D current signal end IVD_MAX and transverter Y current signal end IVY_MAX, be connected to an input end of secondary extremal selector switch 3012 by the first extreme value selector switch 3011, neutral current signal end IDNC_PU is connected to another input end of secondary extremal selector switch 3012; The output terminal of secondary extremal selector switch 3012 is connected to maximum current signal end CURRMAX;
Maximum current signal end CURRMAX is successively by the 4th timer 3024 and the 6th timer 3026, is connected to second or an input end of door 3042; Maximum current signal end CURRMAX is by the 5th timer 3025, is connected to second or another input end of door 3042; Second or door 3042 output terminal by the 7th timer 3027, be connected to the first overcurrent protection signal end OC_TRIP1.
As shown in Figure 2, overcurrent protection simulator of the present utility model also comprise first these schmitt trigger 3031, the second these schmitt trigger 3032, the first to the 3rd timers 3021～3023 and first or the door 3041; Maximum current signal end CURRMAX is by first timer 3021, is connected to first or an input end of door 3041; Maximum current signal end CURRMAX is by second timer 3022, is connected to first or another input end of door 3041; First or door 3041 output terminal by the 3rd timer 3023, be connected to the second overcurrent protection signal end OC_TRIP2.
The criterion of overcurrent protection:
Overcurrent protection calculate ID=max (IVY, IVD, IDNE), when ID greater than protection during definite value, the protection action.
ID＞1.508ID_NOM, time-delay 11s tripping operation;
ID＞1.625ID_NOM, time-delay 6s tripping operation;
ID＞2.51D_NOM, time-delay 75ms tripping operation;
ID＞3.5ID_NOM, time-delay 60ms tripping operation.
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. an overcurrent 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 overcurrent protection simulator comprises the first extreme value selector switch, the secondary extremal selector switch, the 3rd this schmitt trigger, the 4th this schmitt trigger, the 4th to the 7th timer and second or the door;
Transverter D current signal end and transverter Y current signal end are connected to an input end of secondary extremal selector switch by the first extreme value selector switch, and the neutral current signal end is connected to another input end of secondary extremal selector switch; The output terminal of secondary extremal selector switch is connected to the maximum current signal end;
The maximum current signal end is successively by the 4th timer and the 6th timer, is connected to second or an input end of door; The maximum current signal end is by the 5th timer, is connected to second or another input end of door; Second or the output terminal of door by the 7th timer, be connected to the first overcurrent protection signal end.
2. overcurrent protection simulator according to claim 1 is characterized in that also comprising first this schmitt trigger, second this schmitt trigger, first to the 3rd timer and first or the door; The maximum current signal end is by first timer, is connected to first or an input end of door; The maximum current signal end is by second timer, is connected to first or another input end of door; First or the output terminal of door by the 3rd timer, be connected to the second overcurrent protection signal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320153452 CN203133504U (en) | 2013-03-29 | 2013-03-29 | Overcurrent protection simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320153452 CN203133504U (en) | 2013-03-29 | 2013-03-29 | Overcurrent protection simulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133504U true CN203133504U (en) | 2013-08-14 |
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ID=48941471
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320153452 Expired - Lifetime CN203133504U (en) | 2013-03-29 | 2013-03-29 | Overcurrent protection simulation device |
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| Country | Link |
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| CN (1) | CN203133504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257585A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Overcurrent protection simulation device |
-
2013
- 2013-03-29 CN CN 201320153452 patent/CN203133504U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257585A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Overcurrent protection simulation device |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |