CN103257586B - Reactive power control simulator - Google Patents
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- CN103257586B CN103257586B CN201310109205.9A CN201310109205A CN103257586B CN 103257586 B CN103257586 B CN 103257586B CN 201310109205 A CN201310109205 A CN 201310109205A CN 103257586 B CN103257586 B CN 103257586B
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Abstract
The invention belongs to the field of electrical measurement and relates to a reactive power control simulator, in particular to a testing device for simulation study of a direct current control and protection system of a direct current high-voltage transmission device. A reactive calculated value signal end and a reactive reference value signal end are connected to a second arithmetic operation element and a third arithmetic operation element through a first arithmetic operation element and a first proportioning element. A limitation reactive value signal end is connected with the second arithmetic operation element and the third arithmetic operation element. A reactive control signal end is connected with a first AND gate and a second AND gate. The second arithmetic operation element is connected to the first AND gate through a first Schmitt trigger. The third arithmetic operation element is connected to the second AND gate through a second Schmitt trigger. The first AND gate is connected to a reactive increasing signal end of a filter through a second timer. The second AND gate is connected to a reactive decreasing signal end of the filter through a first timer. The reactive power control simulator can truly simulate and reflect the operation state of a direct current control protector. Corresponding simulating results are provided for research or design of the direct current control protector.
Description
Technical field
The invention belongs to electric measurement field, particularly relate to a kind of tap joint position simulation testing device of the DC control and protection system simulation study for high-voltage direct-current transmission system.
Background technology
The continuous growth of electricity needs result in the future development of transmission system to long distance, Large Copacity and high stability.Along with the construction project of the ultra-high voltage AC transmission engineering in each Grid and high voltage direct current transmission project constantly increases, 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 obvious multi-infeed DC, electric network composition is tight, between many ac and dc circuits, electrical distance is tightr, after extra-high voltage and the ultrahigh-voltage alternating-current system failure, easy initiation comprises many direct currents commutation failure simultaneously of high voltage direct current, and its rejuvenation of the commutation failure of multiple-circuit line will produce greater impact to AC system, if the recovery policy mismate of each straight-flow system, then also likely cause many direct currents that continuous print commutation failure occurs simultaneously, even cause direct current locking.There is bipolar locking in multiple-circuit line, a large amount of trend shifts or on a large scale by initiating system stable problem simultaneously.Reciprocation between this ac and dc systems brings huge challenge to 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 the reciprocation between ac and dc systems be tested to the stability of extra-high voltage alternating current-direct current series-parallel connection receiving end electrical network and be emulated, and with reference to test and simulation result, the result of research or design is verified, the stability of system is assessed.Chinese utility model patent " a kind of Multi-infeed HVDC transmission system real-timedigital simulation model " (utility model patent number: ZL201210532759.X Authorization Notice No.: CN102945004A) discloses Multi-infeed HVDC transmission system real-timedigital simulation model, it comprises the equivalent super high voltage direct current electricity transmission system of multiple parallel connection, 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, for the operation of control and protection current conversion station.By the control and protection that current conversion station control system and protection system are run current conversion station, after avoiding fault in ac transmission system, easily cause the impact that multiple-circuit line simultaneous faults and multiple-circuit line fault and rejuvenation thereof produce AC system.But this realistic model does not relate to the emulation of tap joint position, cannot the tap joint position running status of simulated high-pressure direct current transportation DC control and protection system truly.
Summary of the invention
The object of the invention is to provide a kind of reactive power control simulator; it can simulate the tap joint position state of reflection D.C. high voltage transmission DC control and protection system truly; for the tap joint position research of DC control protective device or design provide corresponding simulation result, solve for DC control protective device tap joint position research or design the technical matters of verification platform be provided.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of reactive power control simulator, at least comprises reactive power and calculates module and idle control module, for the emulation of the DC control and protection system of high-voltage direct-current transmission system, it is characterized in that:
Described idle control module comprises the first to the 3rd plus and minus calculation element, the first proportioning element, and first and door, second and door, first timer and second timer;
Idle calculating value signal end and idle reference value signal end are connected to the first plus and minus calculation element, the output terminal of the first plus and minus calculation element, be connected to the in-phase input end of the second plus and minus calculation element, and by the first proportioning element, be connected to the in-phase input end of the 3rd plus and minus calculation element, the inverting input of the limit is idle value signal end is connected to the second plus and minus calculation element and the 3rd plus and minus calculation element;
Idle control signal end be connected to first with door and second and the first input end of door; The output terminal of the second plus and minus calculation element, is connected to the second input end of first and door by first this schmitt trigger; The output terminal of the 3rd plus and minus calculation element, is connected to the second input end of second and door by second this schmitt trigger; First with the output terminal of door, be connected to the idle rising signals end of wave filter by second timer; Second with the output terminal of door, be connected to the idle dropping signal end of wave filter by first timer.
The one preferably technical scheme of reactive power control simulator of the present invention, it is characterized in that described reactive power control simulator is also provided with voltage control module, described voltage control module comprises the 4th to the 6th plus and minus calculation element, second proportioning element, 3rd and door, 4th and door, the 3rd timer and the 4th timer; Ac voltage signal end and voltage reference value signal end are connected to the 4th plus and minus calculation element, the output terminal of the 4th plus and minus calculation element, be connected to the in-phase input end that slender acanthopanax subtracts arithmetic element, and by the second proportioning element, be connected to the in-phase input end of the 6th plus and minus calculation element, extreme voltage values signal end is connected respectively to the inverting input that slender acanthopanax subtracts arithmetic element and the 6th plus and minus calculation element; Voltage control signal end be connected to the 3rd with door and the 4th with the first input end of door; Slender acanthopanax subtracts the output terminal of arithmetic element, is connected to the second input end of the 3rd and door by the 3rd this schmitt trigger; The output terminal of the 6th plus and minus calculation element, is connected to the second input end of the 4th and door by the 4th this schmitt trigger; 3rd with the output terminal of door, be connected to filter voltage rising signals end by the 4th timer; 4th with the output terminal of door, be connected to filter voltage dropping signal end by the 3rd timer.
The better technical scheme of one of reactive power control simulator of the present invention, it is characterized in that described reactive power control simulator is also provided with Umax/Qmax control module, described Umax/Qmax control module comprises the 7th plus and minus calculation element, 8th plus and minus calculation element, 5th and door, 5th this schmitt trigger, mode selection switch and comparer; Ac voltage signal end by the 7th plus and minus calculation element and the 5th this schmitt trigger, is connected to wave filter UMax signal end successively; Idle control signal end is connected to the control end of mode selection switch by the 5th and door; The limit is idle, and value signal end passes through the 8th plus and minus calculation element, is connected to mode selection switch; The output terminal of idle calculating value signal end and mode selection switch, is connected respectively to an input end of comparer, and the output terminal of comparer is connected to wave filter QMax signal end.
The invention has the beneficial effects as follows:
1. the tap joint position running status of DC control protective device can be simulated, be reflected to reactive power control simulator of the present invention truly, for the research of DC control protective device or design provide corresponding simulation result;
2. reactive power 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 again in virtual environment with computer software;
Accompanying drawing explanation
Fig. 1 is the theory diagram of the simulator for DC control and protection system;
Fig. 2 is the idle control module schematic diagram of reactive power control simulator of the present invention;
Fig. 3 is the voltage control module schematic diagram of reactive power control simulator of the present invention;
Fig. 4 is the Umax/Qmax control module schematic diagram of reactive power control simulator of the present invention;
Fig. 5 is that the reactive power of reactive power control simulator of the present invention calculates module principle figure.
The label of each parts in above figure: 100-high-voltage direct-current transmission system; 110-alternating current filter switching device; 120-converter power transformer; 130-thyristor converter device; 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-pole output control device; 260-overload control apparatus; 270-Reactive Power Control device, 300-DC system protection unit, 900-runs and controls workstation.2711 ~ 2718-first is to the 8th plus and minus calculation element, 2721 ~ 2725-first is to the 5th this schmitt trigger, 2731-first proportioning element, 2732-second proportioning element, 2741 ~ 2745-first is to the 5th and door, 2751 ~ 2754-first to fourth timer, 2761-mode selection switch, 2762-comparer, INC_F_U-filter voltage rising signals end, INC_F_Q-wave filter is idle rising signals end, DEC_F_U-filter voltage dropping signal end, DEC_F_Q-wave filter is idle dropping signal end, DEC_F_UM-wave filter UMax signal end, DEC_F_QM-wave filter QMax signal end, UAC_100-ac voltage signal end, UCONTROL-voltage control signal end, UREF-voltage reference value signal end, UDEAD-extreme voltage values signal end, QCONTROL-is idle control signal end, QDCAC-is idle calculating value signal end, the QDEAD-limit is idle value signal end, QREF-is idle reference value signal end, ALPHA_ORD-Trigger Angle command signal end.
Embodiment
In order to technique scheme of the present invention can be understood better, be explained in further detail below in conjunction with drawings and Examples.
Fig. 2 illustrates an embodiment of reactive power control simulator of the present invention, for the emulation of the DC control and protection system of high-voltage direct-current transmission system.Reactive power control simulator of the present invention is the main function unit of the Reactive Power Control device 270 of DC control and protection system.The simulator of the DC control and protection system of high-voltage direct-current transmission system as shown in Figure 1.Reactive Power Control device 270 is to the link that current conversion station reactive power controls in DC power transmission control system, it is by the alternating current filter switching device 110 of adjustment current conversion station installing, control the input capacity of reactive-load compensation equipment or change the reactive power of transverter absorption, Reactive Power Control (the Reactive Power Control mode within the limits prescribed that current conversion station and AC system are exchanged, such as, maximum reactive power exchange restriction QMax), or by current conversion station ac bus Control of Voltage (alternating voltage control mode within the limits prescribed, such as, the highest/minimum voltage restriction UMax).
Reactive power control simulator of the present invention at least comprises reactive power and calculates module and idle control module, Fig. 5 illustrates described ac and dc systems and exchanges the embodiment that reactive power calculates module, described idle control module as shown in Figure 2, comprise the first to the 3rd plus and minus calculation element 2711 ~ 2713, first proportioning element 2731, first with door 2741, second and door 2742, first timer 2751 and second timer 2752;
Idle calculating value signal end QDCAC and idle reference value signal end QREF is connected to the first plus and minus calculation element 2711, the output terminal of the first plus and minus calculation element 2711, be connected to the in-phase input end of the second plus and minus calculation element 2712, and by the first proportioning element 2731, be connected to the in-phase input end of the 3rd plus and minus calculation element 2713, the inverting input of the limit is idle value signal end QDEAD is connected to the second plus and minus calculation element 2712 and the 3rd plus and minus calculation element 2713;
Idle control signal end QCONTROL be connected to first with door 2741 and second and the first input end of door 2742; The output terminal of the second plus and minus calculation element 2712, is connected to the second input end of first and door 2741 by first this schmitt trigger 2721; The output terminal of the 3rd plus and minus calculation element 2713, is connected to the second input end of second and door 2742 by second this schmitt trigger 2722; First with the output terminal of door 2741, be connected to wave filter idle rising signals end INC_F_Q by second timer 2752; Second with the output terminal of door 2742, be connected to wave filter idle dropping signal end DEC_F_Q by first timer 2751.
The embodiment of reactive power control simulator of the present invention is also provided with voltage control module, described voltage control module as shown in Figure 3, comprise the 4th to the 6th plus and minus calculation element 2714 ~ 2716, second proportioning element 2732,3rd with door 2743,4th with door the 2744, three timer 2 753 and the 4th timer 2 754; Ac voltage signal end UAC_100 and voltage reference value signal end UREF is connected to the 4th plus and minus calculation element 2714, the output terminal of the 4th plus and minus calculation element 2714, be connected to the in-phase input end that slender acanthopanax subtracts arithmetic element 2715, and by the second proportioning element 2732, be connected to the in-phase input end of the 6th plus and minus calculation element 2716, extreme voltage values signal end UDEAD is connected respectively to the inverting input that slender acanthopanax subtracts arithmetic element 2715 and the 6th plus and minus calculation element 2716; Voltage control signal end UCONTROL be connected to the 3rd with door 2743 and the 4th with the first input end of door 2744; Slender acanthopanax subtracts the output terminal of arithmetic element 2715, is connected to the second input end of the 3rd and door 2743 by the 3rd this schmitt trigger 2723; The output terminal of the 6th plus and minus calculation element 2716, is connected to the second input end of the 4th and door 2744 by the 4th this schmitt trigger 2724; 3rd with the output terminal of door 2743, be connected to filter voltage rising signals end INC_F_U by the 4th timer 2 754; 4th with the output terminal of door 2744, be connected to filter voltage dropping signal end DEC_F_U by the 3rd timer 2 753.
Another embodiment of reactive power control simulator of the present invention is also provided with Umax/Qmax control module, described Umax/Qmax control module as shown in Figure 4, comprise the 7th plus and minus calculation element 2717,8th plus and minus calculation element 2718,5th with door 2745,5th this schmitt trigger 2725, mode selection switch 2761 and comparer 2762; Ac voltage signal end UAC_100 by the 7th plus and minus calculation element 2717 and the 5th this schmitt trigger 2725, is connected to wave filter UMax signal end DEC_F_UM successively; Idle control signal end QCONTROL is connected to the control end Ctrl of mode selection switch 2761 by the 5th and door 2745; The limit is idle, and value signal end QDEAD passes through the 8th plus and minus calculation element 2718, is connected to mode selection switch 2761; The output terminal of idle calculating value signal end QDCAC and mode selection switch 2761, is connected respectively to an input end of comparer 2762, and the output terminal of comparer 2762 is connected to wave filter QMax signal end DEC_F_QM.
Reactive power calculates an embodiment of module as shown in Figure 5, reactive power calculates module for calculating the reactive power exchange amount of current conversion station and AC system, reactive power calculates module according to input parameters such as ac voltage signal end UAC_100 and Trigger Angle command signal end ALPHA_ORD, calculates reactive power exchange amount and is sent to idle calculating value signal end QDCAC.
Those of ordinary skill in the art will be appreciated that; above embodiment is only used to technical scheme of the present invention is described; and be not used as limitation of the invention; any the above embodiment is done based on connotation of the present invention change, modification, all will drop in the protection domain of claim of the present invention.
Claims (3)
1. a reactive power control simulator, at least comprises reactive power and calculates module and idle control module, for the emulation of the DC control and protection system of high-voltage direct-current transmission system, it is characterized in that:
Described idle control module comprises the first to the 3rd plus and minus calculation element, the first proportioning element, and first and door, second and door, first timer and second timer;
Idle calculating value signal end and idle reference value signal end are connected to the first plus and minus calculation element, the output terminal of the first plus and minus calculation element, be connected to the in-phase input end of the second plus and minus calculation element, and by the first proportioning element, be connected to the in-phase input end of the 3rd plus and minus calculation element, the inverting input of the limit is idle value signal end is connected to the second plus and minus calculation element and the 3rd plus and minus calculation element;
Idle control signal end be connected to first with door and second and the first input end of door; The output terminal of the second plus and minus calculation element, is connected to the second input end of first and door by first this schmitt trigger; The output terminal of the 3rd plus and minus calculation element, is connected to the second input end of second and door by second this schmitt trigger; First with the output terminal of door, be connected to the idle rising signals end of wave filter by second timer; Second with the output terminal of door, be connected to the idle dropping signal end of wave filter by first timer.
2. reactive power control simulator according to claim 1, it is characterized in that described reactive power control simulator is also provided with voltage control module, described voltage control module comprises the 4th to the 6th plus and minus calculation element, second proportioning element, 3rd and door, 4th and door, the 3rd timer and the 4th timer; Ac voltage signal end and voltage reference value signal end are connected to the 4th plus and minus calculation element, the output terminal of the 4th plus and minus calculation element, be connected to the in-phase input end that slender acanthopanax subtracts arithmetic element, and by the second proportioning element, be connected to the in-phase input end of the 6th plus and minus calculation element, extreme voltage values signal end is connected respectively to the inverting input that slender acanthopanax subtracts arithmetic element and the 6th plus and minus calculation element; Voltage control signal end be connected to the 3rd with door and the 4th with the first input end of door; Slender acanthopanax subtracts the output terminal of arithmetic element, is connected to the second input end of the 3rd and door by the 3rd this schmitt trigger; The output terminal of the 6th plus and minus calculation element, is connected to the second input end of the 4th and door by the 4th this schmitt trigger; 3rd with the output terminal of door, be connected to filter voltage rising signals end by the 4th timer; 4th with the output terminal of door, be connected to filter voltage dropping signal end by the 3rd timer.
3. reactive power control simulator according to claim 1 and 2, it is characterized in that described reactive power control simulator is also provided with Umax/Qmax control module, described Umax/Qmax control module comprises the 7th plus and minus calculation element, 8th plus and minus calculation element, 5th and door, 5th this schmitt trigger, mode selection switch and comparer; Ac voltage signal end by the 7th plus and minus calculation element and the 5th this schmitt trigger, is connected to wave filter UMax signal end successively; Idle control signal end is connected to the control end of mode selection switch by the 5th and door; The limit is idle, and value signal end passes through the 8th plus and minus calculation element, is connected to mode selection switch; The output terminal of idle calculating value signal end and mode selection switch, is connected respectively to an input end of comparer, and the output terminal of comparer is connected to wave filter QMax signal end.
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| CN201310109205.9A CN103257586B (en) | 2013-03-29 | 2013-03-29 | Reactive power control simulator |
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|---|---|---|---|---|
| US4264951A (en) * | 1978-06-14 | 1981-04-28 | Hitachi, Ltd. | DC Power transmission control |
| CN87101909A (en) * | 1986-03-14 | 1987-09-23 | 株式会社东芝 | DC transmission system |
| CN1881202A (en) * | 2005-06-16 | 2006-12-20 | 许继集团有限公司 | Simulation system and simulation method for high voltage AC and DC power transmission training |
| KR101152364B1 (en) * | 2010-11-29 | 2012-06-11 | 한국전력공사 | Control device for reactive power compansator of hvdc system and hvdc system having the same |
| CN203133508U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | Reactive power control simulator |
-
2013
- 2013-03-29 CN CN201310109205.9A patent/CN103257586B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4264951A (en) * | 1978-06-14 | 1981-04-28 | Hitachi, Ltd. | DC Power transmission control |
| CN87101909A (en) * | 1986-03-14 | 1987-09-23 | 株式会社东芝 | DC transmission system |
| CN1881202A (en) * | 2005-06-16 | 2006-12-20 | 许继集团有限公司 | Simulation system and simulation method for high voltage AC and DC power transmission training |
| KR101152364B1 (en) * | 2010-11-29 | 2012-06-11 | 한국전력공사 | Control device for reactive power compansator of hvdc system and hvdc system having the same |
| CN203133508U (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | Reactive power control simulator |
Non-Patent Citations (2)
| Title |
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| 直流输电换流站无功功率控制功能设计;张望等;《电力系统保护与控制》;20090716;第37卷(第14期);第72-76页 * |
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