CN105244876A - Simulation playback method for fault recording of high-voltage direct-current transmission system - Google Patents
Simulation playback method for fault recording of high-voltage direct-current transmission system Download PDFInfo
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Abstract
The invention relates to a simulation playback method for fault recording of a high-voltage direct-current transmission system, which comprises the steps of respectively obtaining the amplitude and the phase of a fault waveform voltage source of a rectifying station and an inverter station before and after a fault of the high-voltage direct-current transmission system through a data read-in module, and respectively adjusting the amplitude and the phase of an ideal voltage source of the rectifying station and the inverter station according to the amplitude and the phase so as to keep the amplitude and the phase consistent with the amplitude and the phase of the fault waveform voltage source; and the switching control switch controls the switching states of the fault waveform voltage source circuit breaker and the ideal voltage source circuit breaker, so that the stable switching between the ideal voltage source and the fault waveform voltage source based on fault recording data is realized, the process of manually adjusting simulation parameters for multiple times is avoided, the simulation times are reduced, the automatic simulation playback of the fault recording of the high-voltage direct-current power transmission system is realized, and the fault playback accuracy and the simulation efficiency are improved.
Description
Technical field
The present invention relates to power system fault simulation technical field, particularly relate to a kind of emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording.
Background technology
In the HVDC (High Voltage Direct Current) transmission system of actual motion, when AC system break down cause direct current system normally not run time, current conversion station electrical secondary system will trigger current conversion station fault recording system, each for the current conversion station before and after fault signal waveform is preserved; If the true fault data of real system can be made good use of; fault recurrence is carried out in the detailed model of HVDC (High Voltage Direct Current) transmission system; help engineering staff is analyzed ac and dc systems to influence each other mechanism, Optimal improvements DC control and protection system, thus improve the reliability of DC operation.
But because the control of direct current system wants complicated many compared with AC system, its electric parameters signal and control signal will far more than AC transmission system, therefore corresponding DC Model simulation scale is huge, single simulation time is consuming time longer, thus its fault simulation playback is also faced with some difficult problems: such as, how to choose suitable fault recorder data, make DC control protection model can react physical fault situation as far as possible really; How to improve DC transmission system fault recurrence precision, reduce emulation desired times, improve fault simulation playback efficiency.
Traditional high-voltage direct current failure wave-recording emulation mode, does not solve above-mentioned technical barrier.
Summary of the invention
Based on this, be necessary for above-mentioned technical problem, a kind of emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording is provided.
An emulation back method for HVDC (High Voltage Direct Current) transmission system failure wave-recording, comprises the steps:
Read in by data the voltage waveform data that module obtains converting plant and Inverter Station ac bus before and after HVDC (High Voltage Direct Current) transmission system fault, and export converting plant and the Inverter Station fault waveform voltage source of HVDC (High Voltage Direct Current) transmission system simulation model to;
Respectively by the fault waveform voltage source of converting plant and Inverter Station and ideal voltage source arranged side by side, and respectively by the ac bus of circuit breaker access rectification side and inverter side, fault waveform voltage source short-circuiting device to be disconnected, and by ideal voltage source breaker closing;
Before HVDC (High Voltage Direct Current) transmission system fault, voltage magnitude and the phase place in moment is set according to fault waveform voltage source, exported magnitude of voltage and the phase value signal of expection by amplitude phase adjusting module, and described magnitude of voltage and phase value signal are input to ideal voltage source;
The magnitude of voltage of ideal voltage source and phase value signal are set the voltage magnitude in moment and phase place contrasts respectively with before fault waveform voltage source fault; When magnitude of voltage and the phase value signal of ideal voltage source are consistent with the amplitude and phase place that set the moment before fault waveform voltage source fault respectively, by amplitude phase adjusting module output switching time-ofday signals;
According to described switching instant signal, close fault waveform voltage source circuit breaker by switching controls switch, disconnect ideal voltage source circuit breaker, to the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording.
The emulation back method of above-mentioned HVDC (High Voltage Direct Current) transmission system failure wave-recording, amplitude and the phase place that module obtains converting plant and Inverter Station fault waveform voltage source before and after HVDC (High Voltage Direct Current) transmission system fault is respectively read in by data, and respectively the amplitude of converting plant and Inverter Station ideal voltage source and phase place are adjusted according to described amplitude and phase place, the amplitude of itself and fault waveform voltage source and phase place are consistent; Pass through the on off state of switching controls switch control rule fault waveform voltage source circuit breaker and ideal voltage source circuit breaker again, realize ideal voltage source with based on the steady switching of the fault waveform voltage source of fault recorder data, avoid the process manually repeatedly adjusting simulation parameter, decrease simulation times, achieve the failure wave-recording automatic simulation playback of HVDC (High Voltage Direct Current) transmission system, improve fault recurrence accuracy and simulation efficiency.
Accompanying drawing explanation
Fig. 1 is the emulation back method flow chart of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of one embodiment of the present of invention;
Fig. 2 is the method flow diagram of step S3 in the emulation back method of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of an alternative embodiment of the invention;
Fig. 3 is the structural representation of two ends HVDC (High Voltage Direct Current) transmission system;
Fig. 4 is the one pole equivalent circuit diagram of traditional two ends HVDC (High Voltage Direct Current) transmission system;
Fig. 5 is the failure wave-recording controlled voltage source of the Inverter Station of two ends HVDC (High Voltage Direct Current) transmission system and the structural representation of ideal voltage source model arranged side by side;
Fig. 6 is the fundamental diagram of the amplitude phase adjusting module of the emulation back method of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of an alternative embodiment of the invention;
Fig. 7 is fault waveform voltage source when adopting manually adjustment and ideal voltage source waveform comparison schematic diagram;
Fig. 8 adopts direct voltage fault simulation waveform during manually adjustment to record waveform with reality to contrast schematic diagram;
Fig. 9 is fault waveform voltage source after the emulation back method applying HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention and ideal voltage source waveform comparison figure;
To be direct voltage fault simulation waveform after the emulation back method applying HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention record waveform contrast schematic diagram with actual Figure 10.
Embodiment
In order to further set forth the technological means that the present invention takes and the effect obtained, below in conjunction with accompanying drawing and preferred embodiment, to technical scheme of the present invention, carry out clear and complete description.
As shown in Figure 1, Fig. 1 is the emulation back method flow chart of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of one embodiment of the present of invention.
An emulation back method for HVDC (High Voltage Direct Current) transmission system failure wave-recording, comprises the steps:
Step S1: read in by data the voltage waveform data that module obtains converting plant and Inverter Station ac bus before and after HVDC (High Voltage Direct Current) transmission system fault, and export converting plant and the Inverter Station fault waveform voltage source of HVDC (High Voltage Direct Current) transmission system simulation model to;
Step S1: respectively by the fault waveform voltage source of converting plant and Inverter Station and ideal voltage source arranged side by side, and respectively by the ac bus of circuit breaker access rectification side and inverter side, fault waveform voltage source short-circuiting device to be disconnected, and by ideal voltage source breaker closing;
Step S2: the voltage magnitude and the phase place that set the moment according to fault waveform voltage source before HVDC (High Voltage Direct Current) transmission system fault, exported magnitude of voltage and the phase value signal of expection by amplitude phase adjusting module, and described magnitude of voltage and phase value signal are input to ideal voltage source;
Step S3: the magnitude of voltage of ideal voltage source and phase value signal are set the voltage magnitude in moment and phase place contrasts respectively with before fault waveform voltage source fault; When magnitude of voltage and the phase value signal of ideal voltage source are consistent with the amplitude and phase place that set the moment before fault waveform voltage source fault respectively, by amplitude phase adjusting module output switching time-ofday signals;
Step S4: according to described switching instant signal, closes fault waveform voltage source circuit breaker by switching controls switch, disconnects ideal voltage source circuit breaker, to the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording.
The emulation back method of above-mentioned HVDC (High Voltage Direct Current) transmission system failure wave-recording, amplitude and the phase place that module obtains converting plant and Inverter Station fault waveform voltage source before and after HVDC (High Voltage Direct Current) transmission system fault is respectively read in by data, and respectively the amplitude of converting plant and Inverter Station ideal voltage source and phase place are adjusted according to described amplitude and phase place, the amplitude of itself and fault waveform voltage source and phase place are consistent; Pass through the on off state of switching controls switch control rule fault waveform voltage source circuit breaker and ideal voltage source circuit breaker again, realize ideal voltage source with based on the steady switching of the fault waveform voltage source of fault recorder data, avoid the process manually repeatedly adjusting simulation parameter, decrease simulation times, achieve the failure wave-recording automatic simulation playback of HVDC (High Voltage Direct Current) transmission system, improve fault recurrence accuracy and simulation efficiency.
As shown in Figure 2, Fig. 2 is the method flow diagram of step S3 in the emulation back method of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of an alternative embodiment of the invention.
In the present embodiment, in the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, described the magnitude of voltage of ideal voltage source and phase value signal are set the voltage magnitude in moment and phase place contrasts respectively with before fault waveform voltage source fault; When magnitude of voltage and the phase value signal of ideal voltage source are consistent with the amplitude and phase place that set the moment before fault waveform voltage source fault respectively, comprised by the step of amplitude phase adjusting module output switching time-ofday signals:
Step S301: according to the waveform peak data in HVDC (High Voltage Direct Current) transmission system fault prior fault waveform voltage source, calculates the line voltage effective value before fault waveform voltage source fault;
Step S302: using the output signal of described line voltage effective value as the line voltage effective value signal of amplitude phase adjusting module, and described output signal is input to ideal voltage source;
Step S303: by amplitude phase adjusting module, calculates the voltage-phase value of ideal voltage source A phase;
Step S304: according to time difference minimum principle, calculates the moment that fault waveform voltage source is identical with ideal voltage source amplitude, and calculates the phase difference of described moment fault waveform voltage source and ideal voltage source;
Step S305: according to the voltage-phase value of described ideal voltage source A phase and the phase difference of described moment fault waveform voltage source and ideal voltage source, by amplitude phase adjusting module, ideal voltage source is adjusted;
Step S306: when setting the phase value in moment before fault waveform voltage source fault with the phase value of ideal voltage source close to time consistent, start pulse signal is produced by amplitude phase adjusting module, and by amplitude phase adjusting module output switching time-ofday signals after described start pulse signal being carried out broadening time delay.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, the step of the line voltage effective value before described calculating fault waveform voltage source fault comprises:
In formula, U
rmsrepresent line voltage effective value, U
peakthe phase voltage peak value in moment is set before representing fault waveform voltage source fault.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, described by amplitude phase adjusting module, the step calculating the voltage-phase value of ideal voltage source A phase comprises:
Described amplitude phase adjusting module, according to principle of phase lock loop, by input ideal voltage source three-phase voltage, calculates the phase value of ideal voltage source A phase.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, described according to time difference minimum principle, the step calculating the fault waveform voltage source moment identical with ideal voltage source amplitude comprises:
In formula, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, the step of the phase difference of fault waveform voltage source of described calculating described moment and ideal voltage source comprises:
In formula,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, the phase difference of the described voltage-phase value according to described ideal voltage source A phase and described moment fault waveform voltage source and ideal voltage source, is comprised the step that ideal voltage source adjusts by amplitude phase adjusting module:
In formula,
represent the phase place after ideal voltage source adjustment,
represent the phase place before ideal voltage source adjustment,
for representing the phase difference of moment t fault waveform voltage source and ideal voltage source, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, described switching instant signal meets following condition:
In formula, t
onrepresent switching instant signal, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source.
Wherein in an embodiment, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, described according to described switching instant signal, fault waveform voltage source circuit breaker is closed by switching controls switch, disconnect ideal voltage source circuit breaker, the step of the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording comprised:
In formula, BRK, BRK
1represent respectively converting plant or Inverter Station fault waveform voltage source and ideal voltage source connect the state control signal of circuit breaker, BRK=0 represents that fault waveform voltage source circuit breaker disconnects, and BRK=0 represents fault waveform voltage source breaker closing, BRK
1=0 represents that ideal voltage source circuit breaker disconnects, BRK
1=1 represents ideal voltage source breaker closing, and t represents simulation time, t
onrepresent switching instant signal.
The emulation back method of above-mentioned HVDC (High Voltage Direct Current) transmission system failure wave-recording, amplitude and the phase place that module obtains converting plant and Inverter Station fault waveform voltage source before and after HVDC (High Voltage Direct Current) transmission system fault is respectively read in by data, and respectively the amplitude of converting plant and Inverter Station ideal voltage source and phase place are adjusted according to described amplitude and phase place, the amplitude of itself and fault waveform voltage source and phase place are consistent; Pass through the on off state of switching controls switch control rule fault waveform voltage source circuit breaker and ideal voltage source circuit breaker again, realize ideal voltage source with based on the steady switching of the fault waveform voltage source of fault recorder data, avoid the process manually repeatedly adjusting simulation parameter, decrease simulation times, achieve the failure wave-recording automatic simulation playback of HVDC (High Voltage Direct Current) transmission system, improve fault recurrence accuracy and simulation efficiency.
Below in conjunction with concrete practical application, the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention is described in detail.
That the present embodiment adopts is a kind of the Summary of Power System Simulation Software PSCAD/EMTDC, wherein, power system computation machine Computer Aided Design (PowerSystemsComputerAidedDesign, PSCAD) is widely used electromagnetic transient simulation software in the world; And direct solenoid Transient calculation program (ElectromagneticTransientsincludingDC, EMTDC) is its simulation core, PSCAD provides pattern manipulation interface for EMTDC.In concrete practical application, also can adopt the simulation software of other electric power systems.
As shown in Figure 3, Fig. 3 is the structural representation of two ends HVDC (High Voltage Direct Current) transmission system.
It should be noted that, the two ends HVDC (High Voltage Direct Current) transmission system of the present embodiment works in specific voltage and current grade, but these electric pressures and topological structure are as just example, utilize method of the present invention can also be used for DC transmission system that is more complicated and more multi-voltage grade.
As shown in Figure 4, Fig. 4 is the one pole equivalent circuit diagram of traditional two ends HVDC (High Voltage Direct Current) transmission system.
According to direct current conveying capacity analysis theories, the operation characteristic of converter can be described by 9 equations below:
Wherein, P
dand Q
drepresent active power and the reactive power of converter conveying respectively, U
dand I
drepresent direct voltage and the electric current of each converter respectively, γ and μ represents corresponding extinguish angle and overlap angle respectively, U and δ represent respectively each converter of inverter side connect voltage and the phase angle of ac bus, B
crepresent the equivalent susceptance of corresponding alternating current filter and reactive compensation capacitor, Q
crepresent corresponding reactive compensation capacity, | Z
k| represent each converter connect AC system equiva lent impedance, E represents AC system equivalent electromotive force, C with K represents the constant relevant with converter transformer parameter and direct current system.
For each converter, total γ, μ, U
d, I
d, P
d, Q
d, U, δ, P
ac, Q
acwith 11 variablees such as E.Therefore, have 9 equations and 11 variablees, above-mentioned equation has two state variables independent, as long as determine arbitrarily wherein Two Variables, all the other each variablees of direct current system all can obtain Exact Solution.The present invention utilizes this feature just, by importing physical fault recorder data, by regulating amplitude U and the phase place δ of HVDC (High Voltage Direct Current) transmission system both sides ac bus voltage, realizes the fault simulation playback for HVDC (High Voltage Direct Current) transmission system.
As shown in Figure 5, Fig. 5 is the Inverter Station failure wave-recording controlled voltage source of two ends HVDC (High Voltage Direct Current) transmission system and the structural representation of ideal voltage source model arranged side by side.
It should be noted that, because the model of rectification side and inverter side and method of adjustment are all consistent, therefore the present embodiment only illustrates the basic step of the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention for inverter side, and rectification side is also same principle.
The data utilizing PSCAD to carry read in Inverter Station ac bus voltage waveform data before and after module read failure, each single-phase voltage instantaneous value of Inverter Station ac bus before and after output signal U ACA, UACB, UACC difference representing fault; Input signal using UACA, UACB, UACC as Inverter Station fault waveform voltage source model in simulation model; Fault waveform voltage source model and desired voltage source model are listed on ac bus by circuit breaker, now the value of fault waveform voltage source circuit-breaker status signal BRK is 0, the value of BRK1 is 1, and fault waveform voltage source circuit breaker disconnects, ideal voltage source breaker closing; By amplitude and the phase place of amplitude phase adjusting module adjustment desired voltage source model, make its amplitude with the moment before fault waveform voltage source fault and phase place consistent, and change control diverter switch by the switching instant that amplitude phase adjusting module exports, circuit-breaker status is changed at switching instant, closed false voltage source circuit breaker, disconnects ideal voltage source circuit breaker; Thus the steady switching realized from desired voltage source waveform to failure wave-recording.
As shown in Figure 6, Fig. 6 is the fundamental diagram of the amplitude phase adjusting module of the emulation back method of the HVDC (High Voltage Direct Current) transmission system failure wave-recording of an alternative embodiment of the invention.
The input signal of described amplitude phase adjusting module comprises the A phase voltage of ideal voltage source three-phase voltage and fault waveform voltage source; Described amplitude phase adjusting module comprises line voltage effective value computing unit, phase difference calculating unit and switching instant production unit.
1, in on-Line Voltage effective value computing unit, according to the waveform peak data in fault prior fault waveform voltage source, the step calculating the line voltage effective value before fault waveform voltage source fault comprises:
In formula, U
rmsrepresent line voltage effective value, U
peakthe phase voltage peak value in moment is set before representing fault waveform voltage source fault.
2, in phase difference calculating unit, according to time difference minimum principle, calculate the moment that fault waveform voltage source is identical with ideal voltage source amplitude, and the step calculating the phase difference of described moment fault waveform voltage source and ideal voltage source comprises:
1) according to time difference minimum principle, the step calculating the fault waveform voltage source moment identical with ideal voltage source amplitude comprises:
In formula, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle;
The 50HZ AC system corresponding cycle is 0.02s, if if choosing of t1, t2 moment meets above-mentioned equation, then represents that t1, t2 moment is chosen and meets time difference minimum principle, can be used for subsequent calculations, if do not meet, then need again to choose t1, t2, until meet above-mentioned inequality.
2) step calculating the phase difference of described moment fault waveform voltage source and ideal voltage source comprises:
In formula,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle.
According to the voltage-phase value of described ideal voltage source A phase and the phase difference of described moment fault waveform voltage source and ideal voltage source, by amplitude phase adjusting module, the step that ideal voltage source adjusts is comprised:
In formula,
represent the phase place after ideal voltage source adjustment,
represent the phase place before ideal voltage source adjustment,
for representing the phase difference of moment t fault waveform voltage source and ideal voltage source, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively.
3, in switching instant production unit, the generation of switching instant signal should meet following condition:
In formula, t
onrepresent switching instant signal, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source.
According to described switching instant signal, close fault waveform voltage source circuit breaker by switching controls switch, disconnect ideal voltage source circuit breaker, the step of the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording is comprised:
In formula, BRK, BRK
1represent respectively converting plant or Inverter Station fault waveform voltage source and ideal voltage source connect the state control signal of circuit breaker, BRK=0 represents that fault waveform voltage source circuit breaker disconnects, and BRK=0 represents fault waveform voltage source breaker closing, BRK
1=0 represents that ideal voltage source circuit breaker disconnects, BRK
1=1 represents ideal voltage source breaker closing, and t represents simulation time, t
onrepresent switching instant signal.
As shown in Figure 7, Fig. 7 is fault waveform voltage source when adopting manually adjustment and ideal voltage source waveform comparison schematic diagram.As can be seen from waveform, time of failure is 16.2s, although fault prior fault waveform voltage source and ideal voltage source amplitude substantially close, phase place still there are differences.
As shown in Figure 8, Fig. 8 adopts direct voltage fault simulation waveform during manually adjustment to record waveform with reality to contrast schematic diagram.As can be seen from the waveform in Fig. 8, because the phase place of fault prior fault waveform voltage source and ideal voltage source amplitude there are differences, having there is significantly disturbance in direct voltage fault simulation waveform, have impact on the accuracy of emulation.
As shown in Figure 9, Fig. 9 is fault waveform voltage source after the emulation back method applying HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention and ideal voltage source waveform comparison schematic diagram.As can be seen from the waveform in Fig. 9, adopt the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, essentially eliminate fault moment prior fault waveform and the difference of ideal voltage source in amplitude and phase place.
As shown in Figure 10, to be direct voltage fault simulation waveform after the emulation back method applying HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention record waveform contrast schematic diagram with actual Figure 10.
As seen from Figure 10, adopt the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording of the present invention, essentially eliminate fault moment prior fault waveform and the difference of ideal voltage source in amplitude and phase place, make when fault waveform voltage source and ideal voltage source switch, reduce system disturbance, achieve the steady switching of the two, decrease the number of times repeating to emulate, improve fault recurrence simulation efficiency.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. an emulation back method for HVDC (High Voltage Direct Current) transmission system failure wave-recording, is characterized in that, comprise the steps:
The voltage waveform data that module obtains converting plant and Inverter Station ac bus before and after HVDC (High Voltage Direct Current) transmission system fault is read in by data, and the converting plant described voltage waveform data exported to respectively in HVDC (High Voltage Direct Current) transmission system simulation model and Inverter Station fault waveform voltage source;
Respectively by the fault waveform voltage source of converting plant and Inverter Station and ideal voltage source arranged side by side, and respectively by the ac bus of circuit breaker access rectification side and inverter side, fault waveform voltage source short-circuiting device to be disconnected, and by ideal voltage source breaker closing;
Before HVDC (High Voltage Direct Current) transmission system fault, voltage magnitude and the phase place in moment is set according to fault waveform voltage source, exported magnitude of voltage and the phase value signal of expection by amplitude phase adjusting module, and described magnitude of voltage and phase value signal are input to ideal voltage source;
The magnitude of voltage of ideal voltage source and phase value signal are set the voltage magnitude in moment and phase place contrasts respectively with before fault waveform voltage source fault; When magnitude of voltage and the phase value signal of ideal voltage source are consistent with the amplitude and phase place that set the moment before fault waveform voltage source fault respectively, by amplitude phase adjusting module output switching time-ofday signals;
According to described switching instant signal, close fault waveform voltage source circuit breaker by switching controls switch, disconnect ideal voltage source circuit breaker, to the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording.
2. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 1, it is characterized in that, described the magnitude of voltage of ideal voltage source and phase value signal are set the voltage magnitude in moment and phase place contrasts respectively with before fault waveform voltage source fault; When magnitude of voltage and the phase value signal of ideal voltage source are consistent with the amplitude and phase place that set the moment before fault waveform voltage source fault respectively, comprised by the step of amplitude phase adjusting module output switching time-ofday signals:
According to the waveform peak data in HVDC (High Voltage Direct Current) transmission system fault prior fault waveform voltage source, calculate the line voltage effective value before fault waveform voltage source fault;
Using the output signal of described line voltage effective value as the line voltage effective value signal of amplitude phase adjusting module, and described output signal is input to ideal voltage source;
By amplitude phase adjusting module, calculate the voltage-phase value of ideal voltage source A phase;
According to time difference minimum principle, calculate the moment that fault waveform voltage source is identical with ideal voltage source amplitude, and calculate the phase difference of described moment fault waveform voltage source and ideal voltage source;
According to the voltage-phase value of described ideal voltage source A phase and the phase difference of described moment fault waveform voltage source and ideal voltage source, by amplitude phase adjusting module, ideal voltage source is adjusted;
When setting the phase value in moment before fault waveform voltage source fault with the phase value of ideal voltage source close to time consistent, start pulse signal is produced by amplitude phase adjusting module, and by amplitude phase adjusting module output switching time-ofday signals after described start pulse signal being carried out broadening time delay.
3. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, is characterized in that, the step of the line voltage effective value before described calculating fault waveform voltage source fault comprises:
In formula, U
rmsrepresent line voltage effective value, U
peakthe phase voltage peak value in moment is set before representing fault waveform voltage source fault.
4. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, is characterized in that, described by amplitude phase adjusting module, and the step calculating the voltage-phase value of ideal voltage source A phase comprises:
Described amplitude phase adjusting module, according to principle of phase lock loop, by input ideal voltage source three-phase voltage, calculates the phase value of ideal voltage source A phase.
5. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, is characterized in that, described according to time difference minimum principle, and the step calculating the fault waveform voltage source moment identical with ideal voltage source amplitude comprises:
In formula, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle.
6. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, is characterized in that, the step of the phase difference of fault waveform voltage source of described calculating described moment and ideal voltage source comprises:
In formula,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source, in the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively, T represents AC system voltage cycle.
7. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, it is characterized in that, the phase difference of the described voltage-phase value according to described ideal voltage source A phase and described moment fault waveform voltage source and ideal voltage source, is comprised the step that ideal voltage source adjusts by amplitude phase adjusting module:
In formula,
represent the phase place after ideal voltage source adjustment,
represent the phase place before ideal voltage source adjustment,
for representing the phase difference of moment t fault waveform voltage source and ideal voltage source, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively.
8. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 2, is characterized in that, described switching instant signal meets following condition:
In formula, t
onrepresent switching instant signal, the moment residing separately when t1, t2 represent that same period internal fault waveform voltage source is identical with ideal voltage source amplitude respectively,
represent the phase difference of moment t fault waveform voltage source and ideal voltage source.
9. the emulation back method of HVDC (High Voltage Direct Current) transmission system failure wave-recording according to claim 1, it is characterized in that, described according to described switching instant signal, fault waveform voltage source circuit breaker is closed by switching controls switch, disconnect ideal voltage source circuit breaker, the step of the carrying out emulation playback of HVDC (High Voltage Direct Current) transmission system failure wave-recording comprised:
In formula, BRK, BRK1 represent respectively converting plant or Inverter Station fault waveform voltage source and ideal voltage source connect the state control signal of circuit breaker, BRK=0 represents that fault waveform voltage source circuit breaker disconnects, and BRK=0 represents fault waveform voltage source breaker closing, BRK
1=0 represents that ideal voltage source circuit breaker disconnects, BRK
1=1 represents ideal voltage source breaker closing, and t represents simulation time, t
onrepresent switching instant signal.
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| CN111756373A (en) * | 2020-06-02 | 2020-10-09 | 中国电力科学研究院有限公司 | Phase-locked loop control method and system based on memory voltage principle |
| CN111859614A (en) * | 2020-06-10 | 2020-10-30 | 中国人民解放军海军航空大学航空作战勤务学院 | Multifunctional advanced disk replication method for simulation system |
| CN113607992A (en) * | 2021-09-08 | 2021-11-05 | 广东电网有限责任公司 | Detection wave generation method of direct current distribution protection device and related device |
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| CN107092198B (en) * | 2016-02-17 | 2020-06-23 | 中国南方电网有限责任公司电网技术研究中心 | Fault analysis method and system for high-voltage direct-current transmission system |
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| CN104571082A (en) * | 2014-12-10 | 2015-04-29 | 国家电网公司 | Data reproduction system and method for feeder automation testing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111756373A (en) * | 2020-06-02 | 2020-10-09 | 中国电力科学研究院有限公司 | Phase-locked loop control method and system based on memory voltage principle |
| CN111859614A (en) * | 2020-06-10 | 2020-10-30 | 中国人民解放军海军航空大学航空作战勤务学院 | Multifunctional advanced disk replication method for simulation system |
| CN111859614B (en) * | 2020-06-10 | 2021-08-31 | 中国人民解放军海军航空大学航空作战勤务学院 | Multifunctional advanced disk replication method for simulation system |
| CN113607992A (en) * | 2021-09-08 | 2021-11-05 | 广东电网有限责任公司 | Detection wave generation method of direct current distribution protection device and related device |
| CN113607992B (en) * | 2021-09-08 | 2023-07-21 | 广东电网有限责任公司 | Detection wave generation method of direct current power distribution protection device and related device |
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