CN103257575B - A kind of pole power control simulation device - Google Patents
A kind of pole power control simulation device Download PDFInfo
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- CN103257575B CN103257575B CN201310106557.9A CN201310106557A CN103257575B CN 103257575 B CN103257575 B CN 103257575B CN 201310106557 A CN201310106557 A CN 201310106557A CN 103257575 B CN103257575 B CN 103257575B
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Abstract
A kind of pole power control simulation device, belong to electric measurement field, particularly relate to a kind of pole power control simulation proving installation of the DC control and protection system simulation study for high-voltage direct-current transmission system, comprise current-order computing unit and bipolar power balance control module, divider, first rate limiter, first mode selector switch and totalizer, second speed limiting device, integrator, phase inverter and the second mode selection switch; Divider, by first rate limiter and first mode selector switch, is connected to totalizer; The output terminal of the second speed limiting device, is connected to the second mode selection switch by integrator, and the second mode selection switch is connected to the transverter trigger angle control module of DC control and protection system by totalizer.This device can be simulated truly, reflect the pole power controlling run state of DC control protective device, for the research of DC control protective device or design provide corresponding simulation result.
Description
Technical field
The invention belongs to electric measurement field, particularly relate to a kind of pole power control simulation proving installation 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: ZL201210532559.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 that pole power controls, cannot the pole power controlling run state 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 pole power control simulation device; it can simulate the pole power control status of reflection D.C. high voltage transmission DC control and protection system truly; pole power control for DC control protective device studies or design provides corresponding simulation result, and the pole power solved as DC control protective device controls research or designs the technical matters providing verification platform.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of pole power control simulation device, for the emulation of the DC control and protection system of high-voltage direct-current transmission system, the operation that described pole power control simulation device is connected to DC control and protection system controls workstation, it is characterized in that:
Described pole power control simulation device comprises current-order computing unit and bipolar power balance control module; Described current-order computing unit, controls workstation by described operation, obtains power/current instruction and power/current rising or falling speed set information;
Described current-order computing unit comprises divider, first rate limiter, first mode selector switch and totalizer; The dividend input end of described divider forms the power signal input end of pole power control simulation device, and the divisor input end of described divider, is connected to the voltage transformer (VT) d. c. voltage signal end of high-voltage direct-current transmission system; The output terminal of described divider, by first rate limiter and first mode selector switch, is connected to an input end of totalizer;
Described bipolar power balance control module comprises the second speed limiting device, integrator, phase inverter and the second mode selection switch; The input end of the second described speed limiting device, is connected to the current signal end of the bipolar neutral line of thyristor converter device; The output terminal of the second described speed limiting device, is connected to the input end A of the second mode selection switch by integrator; The output terminal of described integrator, is connected to the input end B of the second mode selection switch by phase inverter; The output terminal of the second mode selection switch, is connected to another input end of totalizer, the output terminal of described totalizer, is connected to the transverter trigger angle control module of DC control and protection system.
The one preferably technical scheme of pole of the present invention power control simulation device; it is characterized in that the output terminal of described totalizer; be connected to a current margin compensation device; the current command signal that described pole power control simulation device exports; by described current margin compensation device, be connected to the transverter trigger angle control module of DC control and protection system.
The better technical scheme of one of pole of the present invention power control simulation device, is characterized in that described current-order computing unit, is connected to the overloading control module of DC control and protection system, by the maximal value of overloading control module Limited Current instruction.
The technical scheme of a kind of improvement of pole of the present invention power control simulation device, it is characterized in that described first rate limiter is connected to described operation by net control and controls workstation, obtain power/current rising or falling speed signal, the DC power realizing conveying is linearly changed to predetermined power definite value.
The invention has the beneficial effects as follows:
1. the pole power controlling run state of DC control protective device can be simulated, be reflected to pole of the present invention power control simulation device truly, for the research of DC control protective device or design provide corresponding simulation result;
2. pole of the present invention power control simulation device 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 circuit theory diagrams of the simulator for DC control and protection system;
Fig. 2 is the circuit theory diagrams of pole of the present invention power control simulation device.
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.2510-current-order computing unit, 2511-divider, 2512-first rate limiter, 2513-first mode selector switch, 2514-totalizer, 2520-bipolar power balance control module, 2521-second speed limiting device, 2522-integrator, 2523-phase inverter, 2524-second mode selection switch, BIPOWER-power signal input end, the bipolar neutral current signal of IDGND-thyristor converter device, the current command signal that IO10-pole power control simulation device exports, Ud-d. c. voltage signal.
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 pole of the present invention power control simulation device, and for the emulation of the DC control and protection system of high-voltage direct-current transmission system, the operation that pole power control simulation device 250 is connected to DC control and protection system controls workstation 900.The simulator of the DC control and protection system of high-voltage direct-current transmission system as shown in Figure 1.
As shown in Figure 2, pole power control simulation device 250 comprises current-order computing unit 2510 and bipolar power balance control module 2520; Current-order computing unit 2510, controlling workstation 900 by running, obtaining power/current instruction and power/current rising or falling speed set information;
Current-order computing unit 2510 comprises divider 2511, first rate limiter 2512, first mode selector switch 2513 and totalizer 2514; The dividend input end X of divider 2511 forms the power signal input end BIPOWER of pole power control simulation device 250, and the divisor input end Y of divider 2511, is connected to the voltage transformer (VT) d. c. voltage signal end Ud of high-voltage direct-current transmission system; The output terminal X/Y of divider 2511, by first rate limiter 2512 and first mode selector switch 2513, is connected to an input end of totalizer 2514; First mode selector switch 2513 can select two states: OPN represents this pole running status, and OPN_OTP represents the running status of another pole.
Bipolar power balance control module 2520 comprises the second speed limiting device 2521, integrator 2522, phase inverter 2523 and the second mode selection switch 2524; The input end of the second speed limiting device 2521, is connected to the current signal end IDGND of the bipolar neutral line of thyristor converter device 130; The output terminal of the second speed limiting device 2521, by integrator 2522, is connected to the input end A of the second mode selection switch 2524; The output terminal of integrator 2522, is connected to the input end B of the second mode selection switch 2524 by phase inverter 2523; The output terminal of the second mode selection switch 2524, is connected to another input end of totalizer, the output terminal of described totalizer 2514, is connected to the transverter trigger angle control module 220 of DC control and protection system.Second mode selection switch 2524 can select two states: STA represents current conversion station running status, and POLE represents this pole.
In the embodiment of the pole of the present invention power control simulation device shown in Fig. 2; the output terminal of totalizer 2514; be connected to a current margin compensation device (not shown); the current command signal IO10 that pole power control simulation device 250 exports; by described current margin compensation device, be connected to the transverter trigger angle control module 220 of DC control and protection system.
According to the embodiment of pole of the present invention power control simulation device, current-order computing unit 2510, is connected to the overloading control module 260 of DC control and protection system, by the maximal value of overloading control module 260 Limited Current instruction.
According to the embodiment of pole of the present invention power control simulation device, first rate limiter 2512 is connected to run by net control and controls workstation 900, obtain power/current rising or falling speed signal, the DC power realizing conveying is linearly changed to predetermined power definite value.
The operational process of pole of the present invention power control simulation device is as follows:
Pole power control simulation device 250 receives power/current instruction from operations staff and power/current rising or falling speed.When performing change power command, the DC power that speed limiting device 2512 realizes conveying is linearly changed to predetermined power definite value, ensures the fluctuation not causing DC power when carrying out patten transformation between constant dc power control and Given current controller simultaneously.From the maximal value of the IOmax signal Limited Current instruction of overloading control module 260.When Current Control transfers to inverter side, current margin compensation device compensates the electric current equal with current margins and declines.The current command signal IO10 that pole power control simulation device 250 exports, is sent to the transverter trigger angle control module 220 of DC control and protection system.
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 (4)
1. a pole power control simulation device, for the emulation of the DC control and protection system of high-voltage direct-current transmission system, the operation that described pole power control simulation device is connected to DC control and protection system controls workstation, it is characterized in that:
Described pole power control simulation device comprises current-order computing unit and bipolar power balance control module; Described current-order computing unit, controls workstation by described operation, obtains power/current instruction and power/current rising or falling speed set information;
Described current-order computing unit comprises divider, first rate limiter, first mode selector switch and totalizer; The dividend input end of described divider forms the power signal input end of pole power control simulation device, and the divisor input end of described divider, is connected to the voltage transformer (VT) d. c. voltage signal end of high-voltage direct-current transmission system; The output terminal of described divider, by first rate limiter and first mode selector switch, is connected to an input end of totalizer;
Described bipolar power balance control module comprises the second speed limiting device, integrator, phase inverter and the second mode selection switch; The input end of the second described speed limiting device, is connected to the current signal end of the bipolar neutral line of thyristor converter device; The output terminal of the second described speed limiting device, is connected to the input end A of the second mode selection switch by integrator; The output terminal of described integrator, is connected to the input end B of the second mode selection switch by phase inverter; The output terminal of the second mode selection switch, is connected to another input end of totalizer, the output terminal of described totalizer, is connected to the transverter trigger angle control module of DC control and protection system.
2. pole according to claim 1 power control simulation device; it is characterized in that the output terminal of described totalizer; be connected to a current margin compensation device; the current command signal that described pole power control simulation device exports; by described current margin compensation device, be connected to the transverter trigger angle control module of DC control and protection system.
3. pole according to claim 1 power control simulation device, is characterized in that described current-order computing unit, is connected to the overloading control module of DC control and protection system, by the maximal value of overloading control module Limited Current instruction.
4. the pole power control simulation device according to claim 1,2 or 3, it is characterized in that described first rate limiter is connected to described operation by net control and controls workstation, obtain power/current rising or falling speed signal, the DC power realizing conveying is linearly changed to predetermined power definite value.
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| CN201310106557.9A CN103257575B (en) | 2013-03-29 | 2013-03-29 | A kind of pole power control simulation device |
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| CN201310106557.9A CN103257575B (en) | 2013-03-29 | 2013-03-29 | A kind of pole power control simulation device |
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