CN103257584A - Direct current over voltage protection simulating device - Google Patents
Direct current over voltage protection simulating device Download PDFInfo
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- CN103257584A CN103257584A CN2013101091747A CN201310109174A CN103257584A CN 103257584 A CN103257584 A CN 103257584A CN 2013101091747 A CN2013101091747 A CN 2013101091747A CN 201310109174 A CN201310109174 A CN 201310109174A CN 103257584 A CN103257584 A CN 103257584A
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- door
- timer
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- direct current
- overvoltage protection
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Abstract
The invention belongs to the field of electrical measurement, and particularly relates to a direct current over voltage protection simulating device which is used for simulation research of a direct current control protection system of a high voltage direct current transmission device. The direct current over voltage protection simulating device comprises an over voltage judgment module and an over voltage protection motion unit. A neutral current signal end is connected with a first AND gate through a first arithmetic operation element and a first Schmitt trigger, the over voltage judgment module is connected with the first AND gate through a second reference voltage end, the first AND gate is connected with a first OR gate through a first timer, a second reference voltage end is further connected with the first OR gate through a second timer, the over voltage judgment module is connected with a third timer through the a first reference voltage end, and the third timer is further connected with a fifth timer through a fourth timer and the first OR gate. The direct current over voltage protection simulating device can truly simulate and reflect an operation state of a direct current control protection device and offer corresponding simulating results for research or design of the direct current control protection device.
Description
Technical field
The invention belongs to the electric measurement field, relate in particular to a kind of DC overvoltage 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 overvoltage protection, truly the DC overvoltage protection running status of simulated high-pressure direct current transportation DC control protection system.
Summary of the invention
The objective of the invention is to provide a kind of DC overvoltage protection simulator; it can simulate the DC overvoltage protection state of reflection D.C. high voltage transmission DC control protection system truly; for the research of the DC overvoltage protection of DC control protective device or design provide corresponding simulation result, solve the technical matters that DC overvoltage protection research or design for the DC control protective device provide verification platform.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
A kind of DC overvoltage 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 overvoltage protection simulator comprises the superpotential discrimination module and is connected at least one overvoltage protection motor unit of superpotential discrimination module; Described overvoltage protection motor unit comprises the first arithmetical operation element, first this schmitt trigger, first with the door, first to the 5th timer and first or the door;
The neutral current signal end is successively by the first arithmetical operation element and first this schmitt trigger, be connected to first with an input end of door; Described superpotential discrimination module is by second reference voltage end, be connected to first with another input end of door; First with the output terminal of door by first timer, be connected to first or the first input end of door; Described second reference voltage end is also by second timer, is connected to first or second input end of door;
Described superpotential discrimination module is connected to the 3rd timer by first reference voltage end; The 3rd timer is again by the 4th timer, is connected to first or the 3rd input end of door; First or the output terminal of door be connected to the input end of the 5th timer, the output terminal of the 5th timer constitutes the DC overvoltage protection signal end of described DC overvoltage protection simulator.
A kind of preferable technical scheme of DC overvoltage protection simulator of the present invention is characterized in that described superpotential discrimination module comprises the second arithmetical operation element, second to the 4th this schmitt trigger, second with the door and second or; The input end of second this schmitt trigger, the input end of the 3rd this schmitt trigger, and the in-phase input end of the second arithmetical operation element are connected in parallel on the d. c. voltage signal end; Neutral line voltage signal end is connected to the inverting input of the second arithmetical operation element; The output terminal of the 3rd this schmitt trigger, be connected to second with the door an input end; The output terminal of the second arithmetical operation element, by the 4th this schmitt trigger, be connected to second with the door another input end; The output terminal of second this schmitt trigger constitutes second reference voltage end, and be connected to second or the door an input end; Second with the door output terminal, be connected to second or the door another input end; Second or the door output terminal constitute first reference voltage end.
The invention has the beneficial effects as follows:
1. the DC overvoltage protection running status of DC control protective device can be simulated, be reflected to DC overvoltage protection simulator of the present invention truly, for research or the design of DC control protective device provides corresponding simulation result;
2. DC overvoltage protection simulator of the present invention 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 overvoltage protection motor unit circuit theory diagrams of DC overvoltage protection simulator of the present invention;
Fig. 3 is the superpotential discrimination module circuit theory diagrams of DC overvoltage protection simulator of the present invention.
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 arithmetical operation element; the 3012-second arithmetical operation element; 3021～3024-, first to fourth this schmitt trigger; 3031-first and door; 3032-second and door; 3041～3045-, first to the 5th timer; 3051-first or door; 3052-second or door, IDNC_PU-neutral current signal end, UDN100PU-neutral line voltage signal end; UD_PU-d. c. voltage signal end; UDREV1-first reference voltage end, UDREV2-second reference voltage end, OV_TRIP-DC overvoltage protection signal end.
Embodiment
In order to understand technique scheme of the present invention better, be explained in further detail below in conjunction with drawings and Examples.
Fig. 2 has showed an embodiment of DC overvoltage protection simulator of the present invention, 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 overvoltage protection simulator of the present invention 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.
DC overvoltage protection simulator of the present invention comprises the superpotential discrimination module and is connected at least one overvoltage protection motor unit of superpotential discrimination module; Described overvoltage protection motor unit comprises these schmitt triggers 3021, the first of the first arithmetical operation element 3011, the first and door 3031, the first to the 5th timers 3041～3045 and first or door 3051 as shown in Figure 2, and the superpotential discrimination module;
Neutral current signal end IDNC_PU is successively by the first arithmetical operation element 3011 and first this schmitt trigger 3021, be connected to first with an input end of door 3031; Described superpotential discrimination module is by the second reference voltage end UDREV2, be connected to first with another input end of door 3031; First with door 3031 output terminal by first timer 3041, be connected to first or the first input end of door 3051; The second reference voltage end UDREV2 is also by second timer 3042, is connected to first or second input end of door 3051;
Described superpotential discrimination module is connected to the 3rd timer 3043 by the first reference voltage end UDREV1 by the first reference voltage end UDREV1; The 3rd timer 3043 is again by the 4th timer 3044, is connected to first or the 3rd input end of door 3051; First or door 3051 output terminal be connected to the input end of the 5th timer 3045, the output terminal of the 5th timer 3045 constitutes the DC overvoltage protection signal end OV_TRIP of DC overvoltage protection simulator of the present invention.
The superpotential discrimination module of DC overvoltage protection simulator of the present invention comprises these schmitt triggers 3022～3024, second of the second arithmetical operation element 3012, the second to the 4th and door 3032 and second or door 3052 as shown in Figure 3; The input end of second this schmitt trigger 3022, the input end of the 3rd this schmitt trigger 3023, and the in-phase input end of the second arithmetical operation element 3012 are connected in parallel on the d. c. voltage signal end UD_PU; Neutral line voltage signal end UDN100PU is connected to the inverting input of the second arithmetical operation element 3012; The output terminal of the 3rd this schmitt trigger 3023, be connected to second with a door input end of 3032; The output terminal of the second arithmetical operation element 3012, by the 4th this schmitt trigger 3024, be connected to second with door another input end of 3032; The output terminal of second this schmitt trigger 3022 constitutes the second reference voltage end UDREV2, and is connected to second or a door input end of 3052; Second with door 3032 output terminal, be connected to second or another input end of door 3052; Second or door 3052 output terminal constitute the first reference voltage end UDREV1.
The criterion of DC overvoltage protection:
UDL|＞1.1pu or | UDL-UDN|＞1.1pu, 61s locking transverter.
Those of ordinary skill in the art will be appreciated that; above embodiment illustrates technical scheme of the present invention; and be not to be used as limitation of the invention; any variation, modification of the above embodiment being done based on connotation of the present invention all will drop in the protection domain of claim of the present invention.
Claims (2)
1. a DC overvoltage 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 overvoltage protection simulator comprises the superpotential discrimination module and is connected at least one overvoltage protection motor unit of superpotential discrimination module; Described overvoltage protection motor unit comprises the first arithmetical operation element, first this schmitt trigger, first with the door, first to the 5th timer and first or the door;
The neutral current signal end is successively by the first arithmetical operation element and first this schmitt trigger, be connected to first with an input end of door; Described superpotential discrimination module is by second reference voltage end, be connected to first with another input end of door; First with the output terminal of door by first timer, be connected to first or the first input end of door; Described second reference voltage end is also by second timer, is connected to first or second input end of door;
Described superpotential discrimination module is connected to the 3rd timer by first reference voltage end; The 3rd timer is again by the 4th timer, is connected to first or the 3rd input end of door; First or the output terminal of door be connected to the input end of the 5th timer, the output terminal of the 5th timer constitutes the DC overvoltage protection signal end of described DC overvoltage protection simulator.
2. DC overvoltage protection simulator according to claim 1 is characterized in that described superpotential discrimination module comprises the second arithmetical operation element, second to the 4th this schmitt trigger, second with the door and second or; The input end of second this schmitt trigger, the input end of the 3rd this schmitt trigger, and the in-phase input end of the second arithmetical operation element are connected in parallel on the d. c. voltage signal end; Neutral line voltage signal end is connected to the inverting input of the second arithmetical operation element; The output terminal of the 3rd this schmitt trigger, be connected to second with the door an input end; The output terminal of the second arithmetical operation element, by the 4th this schmitt trigger, be connected to second with the door another input end; The output terminal of second this schmitt trigger constitutes second reference voltage end, and be connected to second or the door an input end; Second with the door output terminal, be connected to second or the door another input end; Second or the door output terminal constitute first reference voltage end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101091747A CN103257584A (en) | 2013-03-29 | 2013-03-29 | Direct current over voltage protection simulating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101091747A CN103257584A (en) | 2013-03-29 | 2013-03-29 | Direct current over voltage protection simulating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618331B (en) * | 2013-11-27 | 2016-01-20 | 南方电网科学研究院有限责任公司 | A kind of flexible direct current transmission converter station DC over-voltage Current limited Control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856881A (en) * | 2012-09-05 | 2013-01-02 | 华北电力大学 | Full-bridge MMC (multi-media card)-HVDC (high-voltage direct current) fault classification detection and protection method |
| CN203133509U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | DC overvoltage protection simulator |
-
2013
- 2013-03-29 CN CN2013101091747A patent/CN103257584A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856881A (en) * | 2012-09-05 | 2013-01-02 | 华北电力大学 | Full-bridge MMC (multi-media card)-HVDC (high-voltage direct current) fault classification detection and protection method |
| CN203133509U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | DC overvoltage protection simulator |
Non-Patent Citations (2)
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| 余江等: "南方电网中性母线过电压保护的反事故措施", 《电力系统自动化》, vol. 34, no. 9, 10 May 2010 (2010-05-10), pages 95 - 98 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618331B (en) * | 2013-11-27 | 2016-01-20 | 南方电网科学研究院有限责任公司 | A kind of flexible direct current transmission converter station DC over-voltage Current limited Control method |
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Application publication date: 20130821 |