CN103257575A - Pole power control simulation device - Google Patents
Pole power control simulation device Download PDFInfo
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- CN103257575A CN103257575A CN2013101065579A CN201310106557A CN103257575A CN 103257575 A CN103257575 A CN 103257575A CN 2013101065579 A CN2013101065579 A CN 2013101065579A CN 201310106557 A CN201310106557 A CN 201310106557A CN 103257575 A CN103257575 A CN 103257575A
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Abstract
The invention belongs to the field of electrical measurement, and particularly relates to the pole power control simulation device. The pole power control simulation device is used for simulation study of a direct current control and protection system of high-voltage direct current transmission equipment. The pole power control simulation device comprises an electric current computing element, a double-pole power balance and control unit, a divider, a first speed limiting device, a first mode selection switch, an adding device, a second speed limiting device, an integrator, an inverter and a second mode selection switch. The divider is connected to the adding device through the first speed limiting device and the first mode selection switch. The output end of the second speed limiting device is connected to the second mode selection switch through the integrator, the second mode selection switch is connected to a current converter firing angle control module of the direct current control and protection system through the adding device. The device can truly simulate and reflect a pole power control and operation state of the direct current control and protection device, and supplies corresponding simulation results to study 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 utmost point power control simulation proving installation 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 utmost point power control, truly the utmost point power of simulated high-pressure direct current transportation DC control protection system control running status.
Summary of the invention
The objective of the invention is to provide a kind of utmost point power control simulation device; it can simulate the utmost point power state of a control of reflection D.C. high voltage transmission DC control protection system truly; for the utmost point power of DC control protective device control research or design provide corresponding simulation result, solve the technical matters that utmost point power 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 utmost point power control simulation device is used for the emulation of the DC control protection system of high-voltage direct-current transmission system, and described utmost point power control simulation device is connected to the operation control workstation of DC control protection system, it is characterized in that:
Described utmost point power control simulation device comprises current-order computing unit and bipolar power balance control module; Described current-order computing unit by described operation control workstation, 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 selection switch and totalizer; The dividend input end of described divider constitutes the power signal input end of utmost point 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 selection switch, is connected to an input end of totalizer;
Described bipolar power balance control module comprises second speed limiting device, integrator, phase inverter and second mode selection switch; The input end of described second speed limiting device is connected to the current signal end of the bipolar neutral line of thyristor converter device; The output terminal of described second speed limiting device is connected to the input end A of second mode selection switch by integrator; The output terminal of described integrator is connected to the input end B of second mode selection switch by phase inverter; The output terminal of second mode selection switch is connected to another input end of totalizer, and the output terminal of described totalizer is connected to the transverter trigger angle control module of DC control protection system.
A kind of preferable technical scheme of utmost point power control simulation device of the present invention; the output terminal that it is characterized in that described totalizer; be connected to an electric current nargin compensation system; the current command signal of described utmost point power control simulation device output; by described electric current nargin compensation system, be connected to the transverter trigger angle control module of DC control protection system.
A kind of better technical scheme of utmost point power control simulation device of the present invention is characterized in that described current-order computing unit, is connected to the overloading control module of DC control protection system, by the maximal value of overloading control limit module current-order.
A kind of improved technical scheme of utmost point power control simulation device of the present invention, it is characterized in that described first rate limiter arrives described operation control workstation by the control network connection, obtain power/current rising or falling speed signal, realize that the DC power of conveying is pressed linear change to the predetermined electric power definite value.
The invention has the beneficial effects as follows:
1. the utmost point power control running status of DC control protective device can be simulated, be reflected to utmost point power control simulation device of the present invention truly, for research or the design of DC control protective device provides corresponding simulation result;
2. utmost point power control simulation device 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 circuit theory diagrams for the simulator of DC control protection system;
Fig. 2 is the circuit theory diagrams of utmost point power control simulation device 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.2510-current-order computing unit, the 2511-divider, 2512-first rate limiter, 2513-first mode selection switch, the 2514-totalizer, 2520-bipolar power balance control module, 2521-second speed limiting device, the 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 of IO10-utmost point power control simulation device output, Ud-d. c. voltage signal.
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 utmost point power control simulation device of the present invention, is used for the emulation of the DC control protection system of high-voltage direct-current transmission system, and utmost point power control simulation device 250 is connected to the operation control workstation 900 of DC control protection system.The simulator of the DC control protection system of high-voltage direct-current transmission system as shown in Figure 1.
As shown in Figure 2, utmost point power control simulation device 250 comprises current-order computing unit 2510 and bipolar power balance control module 2520; Current-order computing unit 2510 by operation control workstation 900, obtains power/current instruction and power/current rising or falling speed set information;
Current-order computing unit 2510 comprises divider 2511, first rate limiter 2512, the first mode selection switchs 2513 and totalizer 2514; The dividend input end X of divider 2511 constitutes the power signal input end BIPOWER of utmost point 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 selection switch 2513, is connected to an input end of totalizer 2514; First mode selection switch 2513 can select two states: OPN to represent this utmost point running status, and OPN_OTP represents the running status of another utmost point.
Bipolar power balance control module 2520 comprises second speed limiting device 2521, integrator 2522, phase inverter 2523 and second mode selection switch 2524; The input end of 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 second speed limiting device 2521 by integrator 2522, is connected to the input end A of second mode selection switch 2524; The output terminal of integrator 2522 is connected to the input end B of second mode selection switch 2524 by phase inverter 2523; The output terminal of second mode selection switch 2524 is connected to another input end of totalizer, and the output terminal of described totalizer 2514 is connected to the transverter trigger angle control module 220 of DC control protection system.Second mode selection switch 2524 can select two states: STA to represent the current conversion station running status, and POLE represents this utmost point.
In the embodiment of utmost point power control simulation device of the present invention shown in Figure 2; the output terminal of totalizer 2514; be connected to an electric current nargin compensation system (not shown); the current command signal IO10 of utmost point power control simulation device 250 outputs; by described electric current nargin compensation system, be connected to the transverter trigger angle control module 220 of DC control protection system.
According to the embodiment of utmost point power control simulation device of the present invention, current-order computing unit 2510 is connected to expression among the overloading control module 260(figure of DC control protection system), by the maximal value of overloading control module 260 restriction current-orders.
Embodiment according to utmost point power control simulation device of the present invention, first rate limiter 2512 is not represented in operation control workstation 900(figure by the control network connection), obtain power/current rising or falling speed signal, realize that the DC power of conveying is pressed linear change to the predetermined electric power definite value.
The operational process of utmost point power control simulation device of the present invention is as follows:
Utmost point power control simulation device 250 receives power/current instruction and the power/current rising or falling speed from the operations staff.When carrying out the change power command, the DC power that speed limiting device 2512 realizations are carried to the predetermined electric power definite value, guarantees to decide the fluctuation that DC power was controlled and decided to carry out between the Current Control not cause when pattern is changed to power by linear change simultaneously.Maximal value from the IOmax signal limitations current-order of overloading control module 260.When Current Control was transferred to the inversion side, the electric current that the compensation of electric current nargin compensation system equates with electric current nargin descended.The current command signal IO10 of utmost point power control simulation device 250 output is sent to the transverter trigger angle control module 220 of DC control protection system.
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 (4)
1. a DC control protection simulator is used for the emulation of the DC control protection system of high-voltage direct-current transmission system, and described utmost point power control simulation device is connected to the operation control workstation of DC control protection system, it is characterized in that:
Described utmost point power control simulation device comprises current-order computing unit and bipolar power balance control module; Described current-order computing unit by described operation control workstation, 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 selection switch and totalizer; The dividend input end of described divider constitutes the power signal input end of utmost point 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 selection switch, is connected to an input end of totalizer;
Described bipolar power balance control module comprises second speed limiting device, integrator, phase inverter and second mode selection switch; The input end of described second speed limiting device is connected to the current signal end of the bipolar neutral line of thyristor converter device; The output terminal of described second speed limiting device is connected to the input end A of second mode selection switch by integrator; The output terminal of described integrator is connected to the input end B of second mode selection switch by phase inverter; The output terminal of second mode selection switch is connected to another input end of totalizer, and the output terminal of described totalizer is connected to the transverter trigger angle control module of DC control protection system.
2. utmost point power control simulation device according to claim 1; the output terminal that it is characterized in that described totalizer; be connected to an electric current nargin compensation system; the current command signal of described utmost point power control simulation device output; by described electric current nargin compensation system, be connected to the transverter trigger angle control module of DC control protection system.
3. utmost point power control simulation device according to claim 1 is characterized in that described current-order computing unit, is connected to the overloading control module of DC control protection system, by the maximal value of overloading control limit module current-order.
4. according to claim 1,2 or 3 described utmost point power control simulation devices, it is characterized in that described first rate limiter arrives described operation control workstation by the control network connection, obtain power/current rising or falling speed signal, realize that the DC power of conveying is pressed linear change to the predetermined electric 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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| CN103257575B CN103257575B (en) | 2016-01-27 |
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