CN103257592A - No-load direct current voltage control simulation device - Google Patents
No-load direct current voltage control simulation device Download PDFInfo
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- CN103257592A CN103257592A CN2013101096261A CN201310109626A CN103257592A CN 103257592 A CN103257592 A CN 103257592A CN 2013101096261 A CN2013101096261 A CN 2013101096261A CN 201310109626 A CN201310109626 A CN 201310109626A CN 103257592 A CN103257592 A CN 103257592A
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Abstract
The invention discloses a no-load direct current voltage control simulation device, belongs to the field of electrical measurement, and particularly relates to a testing device for direct current control and protection system simulation study of high-voltage direct current power transmission equipment. According to the no-load direct current voltage control simulation device, direct current voltage reference signals are connected to a mode selective switch through a first arithmetic operation element and a second arithmetic operation element; the direct current voltage reference signals are connected to a second joint gate through a third arithmetic operation element and a first Schmitt trigger; the direct current voltage reference signals are connected to a speed limiting device through a second proportional element and a fourth arithmetic operation element; a fifth arithmetic operation element is connected to the fourth arithmetic operation element; an output end of the speed limiting device is connected to the third arithmetic operation element and the fourth arithmetic operation element through a sixth arithmetic operation element and is connected to a first AND gate through a second Schmitt trigger; and an output end of the first AND gate forms a no-load direct current voltage rise signal end. The no-load direct current voltage control simulation device can truly simulate and reflect the operation state of a direct current control and protection device, and provides a corresponding simulation result for research or design of the direct current control and protection device.
Description
Technical field
The invention belongs to the electric measurement field, relate in particular to a kind of unloaded DC voltage control 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 unloaded DC voltage control, truly the unloaded DC voltage control 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 unloaded DC voltage control simulator; it can simulate the unloaded DC voltage state of a control of reflection D.C. high voltage transmission DC control protection system truly; for unloaded DC voltage control research or the design of DC control protective device provides corresponding simulation result, solve the technical matters that unloaded DC voltage control 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 unloaded DC voltage control simulator is arranged in the change of current variation apparatus for controlling connection 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 unloaded DC voltage control simulator comprises the tap signaling module, first to the 7th arithmetical operation element, first with the door, second or the door, second proportioning element, the second format conversion element, mode selection switch, speed limiting device, the 3rd timer, first this schmitt trigger, second this schmitt trigger;
The DC voltage reference signal by the first arithmetical operation element and the second arithmetical operation element, is connected to described mode selection switch successively; The output terminal of described mode selection switch successively by the 3rd arithmetic arithmetic element and first this schmitt trigger, is connected to described second or an input end of door; The output terminal of described tap signaling module, be connected to described second or the door another input end; Described second or the output terminal of door, constitute the unloaded DC voltage dropping signal end of described unloaded DC voltage control simulator;
Unloaded d. c. voltage signal is connected to described speed limiting device successively by second proportioning element and the 4th arithmetical operation element; The described second format conversion element by described the 5th arithmetical operation element, is connected to described the 4th arithmetical operation element; The output terminal of described speed limiting device by described the 6th arithmetical operation element, is connected to described the 3rd arithmetic arithmetic element and the 4th arithmetical operation element; The output terminal of described the 4th arithmetical operation element, by described second this schmitt trigger, be connected to described first with the door an input end; AC power switching signal end is by described the 3rd timer, be connected to described first with another input end of door; Described first with the output terminal of door, constitute the unloaded DC voltage rising signal end of described unloaded DC voltage control simulator.
A kind of preferable technical scheme of unloaded DC voltage control simulator of the present invention, it is characterized in that described tap signaling module comprises comparer, the 8th arithmetical operation element, second to the 5th with the door, first or the door, first to the 3rd phase inverter, first proportioning element, the first format conversion element, first timer, second timer; The tap joint position signal end is successively by described comparer and second phase inverter, be connected to described second with an input end of door; AC power switching signal end is by described first phase inverter, be connected to described second with another input end of door; Described second with the door output terminal, be connected to the described the 5th with the door an input end; The output terminal of described first timer, be connected to the described the 3rd with an input end of door, and by described the 3rd phase inverter, be connected to described first or an input end of door; The neutral current signal is successively by described first proportioning element, the 8th arithmetical operation element, first format conversion element and the second timer, be connected to the described the 3rd with another input end of door; The described the 3rd with the door output terminal, be connected to described first or the door another input end; Described first or the door output terminal, by the described the 4th with the door, be connected to the described the 5th with the door another input end; The described the 5th with the output terminal of door, constitute the output terminal of described tap signaling module, be connected to described second or door.
The invention has the beneficial effects as follows:
1. the unloaded DC voltage control running status of DC control protective device can be simulated, be reflected to unloaded DC voltage control simulator of the present invention truly, for research or the design of DC control protective device provides corresponding simulation result;
2. unloaded DC voltage control 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 circuit theory diagrams of unloaded DC voltage control 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.2410-tap signaling module, 2411～2418-, first to the 8th arithmetical operation element, 2421～2425-first to the 5th and door, 2426-first or door, 2427-second or door, 2431～2433-, first to the 3rd phase inverter, 2434-first proportioning element, 2435-second proportioning element, the 2436-first format conversion element, the 2437-second format conversion element, 2441-mode selection switch, 2442-speed limiting device, the 2443-comparer, 2451～2453-, first to the 3rd timer, 2454-first this schmitt trigger, 2455-second this schmitt trigger, PACSW-AC power switching signal end, the unloaded DC voltage dropping signal of DEC_UDI0-end, the unloaded DC voltage rising signal end of INC_UDI0-, IDNC_100 neutral current signal, TAPS1-tap joint position signal end, UDREF_R-DC voltage reference signal, the unloaded d. c. voltage signal of UDI0100-, the unloaded DC voltage reference signal of UDI0_REF-.
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 unloaded DC voltage control simulator of the present invention, is connected in the change of current variation apparatus for controlling connection 240 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 change of current variation apparatus for controlling connection 240 that unloaded DC voltage control 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.Converter power transformer tap control device 240 is links that are used for adjusting automatically converter power transformer 120 on-load voltage regulation tap joint position in the DC power transmission control system, its objective is that the pass angle of rupture (extinguish angle) for the triggering angle of keeping rectifier or inversion side in the scope of appointment, perhaps keeps DC voltage or valve winding in converter transformer no-load voltage in the scope of appointment.
As shown in Figure 2, unloaded DC voltage control simulator of the present invention comprises tap signaling module 2410, the first to the 7th arithmetical operation elements 2411～2417, first and door 2421, second or the door 2427, second proportioning element, 2435, the second format conversion elements 2437, mode selection switch 2441, speed limiting device 2442, the 3rd timer 2 453, the first these schmitt trigger 2454, the second these schmitt triggers 2455;
DC voltage reference signal UDREF_R by the first arithmetical operation element 2411 and the second arithmetical operation element 2412, is connected to mode selection switch 2441 successively; The output terminal of mode selection switch 2441 successively by the 3rd arithmetic arithmetic element 2413 and first this schmitt trigger 2454, is connected to second or an input end of door 2427; The output terminal of tap signaling module 2410 is connected to second or door another input end of 2427; Second or door 2427 output terminal, constitute the unloaded DC voltage dropping signal end DEC_UDI0 of unloaded DC voltage control simulator.
Unloaded d. c. voltage signal UDI0100 is connected to speed limiting device 2442 successively by second proportioning element 2435 and the 4th arithmetical operation element 2414; The second format conversion element 2437 by the 5th arithmetical operation element 2415, is connected to the 4th arithmetical operation element 2414; The output terminal of speed limiting device 2442 by the 6th arithmetical operation element 2416, is connected to the 3rd arithmetic arithmetic element 2413 and the 4th arithmetical operation element 2417; The output terminal of the 4th arithmetical operation element 2417, by second this schmitt trigger 2455, be connected to first with a door input end of 2421; AC power switching signal end PACSW is by the 3rd timer 2 453, be connected to first with another input end of door 2421; First with door 2421 output terminal, constitute the unloaded DC voltage rising signal end INC_UDI0 of unloaded DC voltage control simulator of the present invention.
Embodiment according to of the present invention unloaded DC voltage control simulator shown in Figure 2, tap signaling module 2410 is shown in the frame of broken lines zone among Fig. 2, comprise comparer 2443, the eight arithmetical operation elements 2418, the second to the 5th and door 2422～2425, first or the door 2426, first to the 3rd phase inverter, 2431～2433, first proportioning element, 2434, the first format conversion elements 2436, first timer 2451, second timer 2452; Tap joint position signal end TAPS1 is successively by comparer 2443 and second phase inverter 2432, be connected to second with an input end of door 2422; AC power switching signal end PACSW is by first phase inverter 2431, be connected to second with another input end of door 2422; Second with door 2422 output terminal, be connected to the 5th with an input end of door 2425; The output terminal of first timer 2451, be connected to the 3rd with a door input end of 2423, and by the 3rd phase inverter 2433, be connected to first or an input end of door 2426; Neutral current signal IDNC_100 is successively by first proportioning element 2434, the eight arithmetical operation elements, 2418, the first format conversion elements 2436 and the second timer 2452, be connected to the 3rd with another input end of door 2423; The 3rd with door 2423 output terminal, be connected to first or another input end of door 2426; First or door 2426 output terminal, by the 4th with door 2424, be connected to the 5th with another input end of door 2425; The 5th with door 2425 output terminal, constitute the output terminal of tap signaling module 2410, be connected to second or door 2427.
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 unloaded DC voltage control simulator is arranged in the change of current variation apparatus for controlling connection 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 unloaded DC voltage control simulator comprises the tap signaling module, first to the 7th arithmetical operation element, first with the door, second or the door, second proportioning element, the second format conversion element, mode selection switch, speed limiting device, the 3rd timer, first this schmitt trigger, second this schmitt trigger;
The DC voltage reference signal by the first arithmetical operation element and the second arithmetical operation element, is connected to described mode selection switch successively; The output terminal of described mode selection switch successively by the 3rd arithmetic arithmetic element and first this schmitt trigger, is connected to described second or an input end of door; The output terminal of described tap signaling module, be connected to described second or the door another input end; Described second or the output terminal of door, constitute the unloaded DC voltage dropping signal end of described unloaded DC voltage control simulator;
Unloaded d. c. voltage signal is connected to described speed limiting device successively by second proportioning element and the 4th arithmetical operation element; The described second format conversion element by described the 5th arithmetical operation element, is connected to described the 4th arithmetical operation element; The output terminal of described speed limiting device by described the 6th arithmetical operation element, is connected to described the 3rd arithmetic arithmetic element and the 4th arithmetical operation element; The output terminal of described the 4th arithmetical operation element, by described second this schmitt trigger, be connected to described first with the door an input end; AC power switching signal end is by described the 3rd timer, be connected to described first with another input end of door; Described first with the output terminal of door, constitute the unloaded DC voltage rising signal end of described unloaded DC voltage control simulator.
2. unloaded DC voltage according to claim 1 is controlled simulator, it is characterized in that described tap signaling module comprises comparer, the 8th arithmetical operation element, second to the 5th with the door, first or the door, first to the 3rd phase inverter, first proportioning element, the first format conversion element, first timer, second timer; The tap joint position signal end is successively by described comparer and second phase inverter, be connected to described second with an input end of door; AC power switching signal end is by described first phase inverter, be connected to described second with another input end of door; Described second with the door output terminal, be connected to the described the 5th with the door an input end; The output terminal of described first timer, be connected to the described the 3rd with an input end of door, and by described the 3rd phase inverter, be connected to described first or an input end of door; The neutral current signal is successively by described first proportioning element, the 8th arithmetical operation element, first format conversion element and the second timer, be connected to the described the 3rd with another input end of door; The described the 3rd with the door output terminal, be connected to described first or the door another input end; Described first or the door output terminal, by the described the 4th with the door, be connected to the described the 5th with the door another input end; The described the 5th with the output terminal of door, constitute the output terminal of described tap signaling module, be connected to described second or door.
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| CN201310109626.1A CN103257592B (en) | 2013-03-29 | 2013-03-29 | A kind of no-load direct current voltage control simulation device |
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| CN201310109626.1A CN103257592B (en) | 2013-03-29 | 2013-03-29 | A kind of no-load direct current voltage control simulation device |
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| CN103257592B CN103257592B (en) | 2016-03-30 |
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| US6320763B2 (en) * | 2000-01-11 | 2001-11-20 | Murata Manufacturing Co., Ltd. | Switching power supply unit |
| CN1881772A (en) * | 2005-06-16 | 2006-12-20 | 许继集团有限公司 | Method for controlling prediction type extinguish angle in DC power transmission system |
| CN101814732A (en) * | 2009-12-02 | 2010-08-25 | 南京南瑞继保电气有限公司 | Double 12-pulse valve bank coordinated-control method for ultra-high voltage direct-current transmission system |
| CN102945004A (en) * | 2012-12-11 | 2013-02-27 | 上海市电力公司 | Real-time digital simulation model for multi-infeed direct current power transmission system |
| CN203133510U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | No-load DC voltage control simulator |
-
2013
- 2013-03-29 CN CN201310109626.1A patent/CN103257592B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6320763B2 (en) * | 2000-01-11 | 2001-11-20 | Murata Manufacturing Co., Ltd. | Switching power supply unit |
| CN1881772A (en) * | 2005-06-16 | 2006-12-20 | 许继集团有限公司 | Method for controlling prediction type extinguish angle in DC power transmission system |
| CN101814732A (en) * | 2009-12-02 | 2010-08-25 | 南京南瑞继保电气有限公司 | Double 12-pulse valve bank coordinated-control method for ultra-high voltage direct-current transmission system |
| CN102945004A (en) * | 2012-12-11 | 2013-02-27 | 上海市电力公司 | Real-time digital simulation model for multi-infeed direct current power transmission system |
| CN203133510U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | No-load DC voltage control simulator |
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