CN103530453B - Analysis method for locking of extra-high voltage direct current system caused by lightning strike on transmission line - Google Patents
Analysis method for locking of extra-high voltage direct current system caused by lightning strike on transmission line Download PDFInfo
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Abstract
The invention relates to an analysis method for locking an extra-high voltage direct current system caused by lightning striking a transmission line, which comprises the following steps: 1) summarizing the electrical quantity characteristics and the action characteristics of direct current line protection in the lightning stroke locking process; 2) establishing a lightning stroke simulation model of the extra-high voltage direct current system; 3) establishing a simulation model of a converter station measurement system; 4) establishing a control system and a line protection simulation model; 5) combining the three simulation models to form a closed-loop real-time simulation system; 6) the simulation system is used for researching the locking condition of extra-high voltage direct current caused by lightning stroke. The invention provides a lightning stroke simulation modeling method of an extra-high voltage direct current transmission system comprising lines of thousands of kilometers in length, and realizes the coupling real-time simulation of a lightning stroke simulation model and a line protection model, thereby providing an effective means for the research of the lightning stroke locking mechanism of the extra-high voltage direct current system and the fixed value optimization of the protection of the direct current transmission line.
Description
Technical field
The present invention relates to a kind of transmission line of lightning strike of studying and cause the analysis side of extra-high voltage direct-current system generation Closing mechanism
Method, belongs to technical field of power systems.
Background technology
In modern power systems, D.C. high voltage transmission is used for the long-distance transmissions of electric energy, is China's transferring electricity from the west to the east war
Main implementation slightly, and extra-high voltage direct-current transmission is big with its transmission capacity, little feature is lost by more and more
DC engineering is used.UHVDC Transmission Lines length is long, is passed through the landform in area and meteorological complicated condition along the line, holds
Subject to locking of being struck by lightning, thus the safe and stable operation of the system of giving brings stern challenge.The wide extra-high voltage direct-current of cloud is the world
Upper first extra-high voltage direct-current transmission engineering, the most once occurred twice due to thunderbolt one within four years that it puts into operation
Pole and cause the situation of the two poles of the earth locking in succession.Therefore, research extra-high voltage direct-current system thunderbolt Closing mechanism, and take accordingly should
It is beneficial to measure improve extra-high voltage direct-current system operation reliability, reduces system operation risk.
Research currently for thunderbolt DC line focuses mostly at the calculating of inlet wire section Lightning Incoming Wave and the thunder of DC line
Hitting flashover strike calculating aspect, be mainly used in determining the lightning impulse dielectric level of change of current station equipment and DC line insulation can
By property, and in the calculation and check to DC line protection, all there is no the lightning stroke flashover process of transmission line simulation, simply in event
Directly add shorted to earth fault at barrier point, do not take into account the travelling waves of the lightning wave shadow to protection act characteristic in lightning stroke process
Ring.Therefore, it is badly in need of proposing a kind of transmission line of lightning strike and causes the analysis method of extra-high voltage direct-current system generation Closing mechanism.
Summary of the invention
It is an object of the invention to propose a kind of transmission line of lightning strike and cause the analysis of extra-high voltage direct-current system generation locking
Method, instant invention overcomes and can not consider in current DC line protection calculation and check that protection act characteristic is affected by thunder electrical travelling-wave
Defect.
The transmission line of lightning strike of the present invention causes the analysis method of extra-high voltage direct-current system generation locking, including walking as follows
Rapid:
1) by extra-high voltage direct-current occurs that the actual record waveform of thunderbolt locking carry out finishing analysis, summarize thunderbolt and close
Two ends current conversion station line voltage and the wave character of polar curve electric current and the motion characteristic of DC line protection during lock；
2) phantom of the thunderbolt circuit of extra-high voltage DC transmission system is set up；
3) set up UHVDC converter station and measure system simulation model；
4) set up extra-high voltage direct-current control system and simplify phantom and the detailed phantom of route protection；
5) input that the UHVDC converter station that step 3) is set up is measured system simulation model accesses by step 2)
The thunderbolt line voltage that obtains of circuit emulation model and the polar curve magnitude of current, UHVDC converter station step 3) set up is surveyed
Amount system simulation model output is smoothed, send into, as input quantity, the DC control that step 4) is set up after wave filter link
With route protection model, the controlled quentity controlled variable producing DC transmission system after the logical operations of Control protection system is fed back to step
2) for controlling the running status of DC transmission system in, thus measure system using current conversion station and just constitute one as tie
With above-mentioned steps 2) → step 3) → step 4) → step 2) closed loop real-time emulation system, it is achieved that thunderbolt circuit emulation
Computation model and DC control and route protection electrical secondary system phantom couple real-time simulation so that carry out thunderbolt power transmission line
Pass plays the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility；
6) suffer be struck by lightning pole and perfect pole when studying the lightning current shielding circuit various location of different amplitude, opposed polarity
Latch status, and combined circuit protection course of action locking reason is analyzed.
Above-mentioned steps 2) in establish one and include two ends current conversion station and up to the extra-high straightening of thousands of miles transmission line of electricity
Stream transmission system thunderbolt circuit emulation computation model, concrete grammar is as follows:
By certain length X, the DC power transmission line up to thousands of miles is divided into many segments, and every a bit of circuit uses
Parameter is set up four wire transmission systems with the model of power transmission system that frequency changes and is simulated, every a bit of circuit
Two ends are accessed a module based on diode switching capacitance technology and are carried out the impact of transmission line simulation corona, and this module is one
Diode is connected in series with charging capacitor, and the negative electrode of diode is connected with the positive pole of charging capacitor, and the negative pole of charging capacitor connects
Ground, the anode connection electric transmission line of diode, electric capacity is precharged to the discharge inception voltage of circuit, when circuit lightning impulse voltage amplitude surpasses
After crossing electric capacity pre-charge pressure, diode turns on automatically, and electric capacity is access in counter circuit；A gate-controlled switch is utilized to carry out mimic bus
Insulator chain, when the voltage waveform at insulator chain two ends intersects with the volt-second characteristic of insulator, controls switch conduction, mould
Intend insulator generation flashover；Utilize nonlinear resistance to the spark gap simulating in current conversion station, the C-V characteristic of nonlinear resistance with
The C-V characteristic of spark gap is consistent；Utilize IGCT shunt capacitance and add the method for direct-to-ground capacitance at its two ends to simulate converter valve
Lightning Characteristic；Utilize inductance in parallel electric capacity and add the method for direct-to-ground capacitance at its two ends to simulate the thunder of smoothing reactor
Surge characteristic；Three tuning circuits utilizing electric capacity and inductance composition carry out analog DC wave filter；Utilize controlled current source in parallel
Variable resistance simulates lightning channel, and controlled current source is used for simulating lightning current source produced by lightning discharge, according to lightning current
The difference of polarity, lightning current waveform uses the different wave head time to be TfIt is T with the wave rear timetDouble exponential waves be simulated, its table
Reach formula as follows:
(1)
In formula: I is amplitude of lightning current
α is wave rear time constant, with TtApproximation relation be α ≈-0.69/Tt
β is wave-head time constant, with TfApproximation relation be β ≈-3.24/Tf
U (t) is unit jump function, at t > 0 time u (t)=1, during t≤0 u (t)=0；
According to formula (1) by by t1And t2Two lightning current waveforms the most in the same time are added can simulate the effect repeating thunderbolt,
Expression is as follows:
(2)
In formula: I1For at t1The amplitude of lightning current of the thunderbolt that the moment occurs
I2For at t2The amplitude of lightning current of the thunderbolt that the moment occurs
The arithmetical operation function module in control system model according to the available electromagnetic transient state procedure EMTDC of formula (2) is taken
Build lightning current waveform generating functon；Variable resistance is used for simulating lightning channel natural impedance, and its resistance is with the size of amplitude of lightning current
And change.
The above-mentioned difference according to lightning current polarity and choose the lightning current waveform of different wave head wave rear time, the specifically side of choosing
Method is as follows:
A (), for negative polarity thunder and lightning, the discharge capacity in lightning stroke process is smaller first, its wave head time 1 μ s-4 μ s it
Between value, the wave rear time is value between 40 μ s-50 μ s, it is recommended that use the lightning current waveform of 2.6/50 μ s；
B (), for positive polarity thunder and lightning, the discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, its
The wave head time is value between 50 μ s-200 μ s, and the wave rear time is value between 500 μ s-2000 μ s, it is recommended that use 100/1000 μ
The lightning current waveform of s；
By by t1And t2Two lightning current waveform phase Calais simulations the most in the same time repeat the effect of thunderbolt.
Above-mentioned steps 5) in by current conversion station measure system modeling achieve step 2) thunderbolt circuit emulation model with
Step 4) controls and the coupling of route protection model, thus establishes a research thunderbolt and cause extra-high voltage direct-current system to close
The closed loop real-time emulation system of lock machine reason, concrete grammar is as follows:
By studying the frequency response characteristic of UHVDC converter station potentiometer summation current transformer, and this characteristic is entered
The close approximation of row rational function, sets up the phantom of current conversion station measurement apparatus by the transmission function module in EMTDC,
The input of this model is step 2) the thunderbolt line voltage that obtains of circuit emulation model and the polar curve magnitude of current, the output of this model
After smoothing, filtering link, carry out corresponding computing i.e. can get the controlled quentity controlled variable of straight-flow system and the actuating quantity of route protection,
Above-mentioned controlled quentity controlled variable and protection act amount are admitted to step 3) DC control and route protection model and incite somebody to action after logical operations
To information such as Trigger Angle α and locking orders, above-mentioned information is fed back to step 2) thunderbolt circuit emulation model is used for controlling straight
The running status of streaming system；Above-mentioned steps 2) → step 3) → step 4) → step 2) the closed loop real-time emulation system that forms
Achieve thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system phantom couples real-time simulation,
Making to carry out transmission line of lightning strike causes the research of extra-high voltage direct-current system generation Closing mechanism to become possibility.
Above-mentioned steps 6) in, not only have studied the latch status of the pole that suffers to be struck by lightning, be investigated and perfect pole line influence and go out
Lightning wave along circuit communication process, there is wave distortion after cause this pole DC line protection misoperation, thus there is locking
Situation, for suffering to be struck by lightning, pole have studied straight-flow system when thunderbolt causes line flashover and do not causes line flashover the most respectively
Latch status.
Beneficial effects of the present invention is as follows: extra-high voltage DC transmission system is struck by lightning circuit emulation model and extra-high by the present invention
Pressure DC line protection model integrated is in a model, it is achieved the coupling real-time simulation of two models, overcomes current direct current
Route protection calculation and check can not consider the defect that protection act characteristic is affected by thunder electrical travelling-wave, cause for transmission line of lightning strike
The study mechanism of extra-high voltage direct-current system generation locking provides a kind of effective means.The method is utilized to carry out extra-high voltage direct-current
System thunderbolt latch-up problem research can be that protection of direct current supply line principle optimizes and definite value adjusts and provides foundation, thus favorably
In improving extra-high voltage direct-current system operation reliability, reduce system operation risk.
Accompanying drawing explanation
Fig. 1 is the closed-loop simulation system schematic of the present invention.
Fig. 2 is line corona model.
Fig. 3 is lightning current source model.
Fig. 4 is the flow chart of the inventive method.
Detailed description of the invention
Referring to the drawings this method is described in detail:
1) by the actual record waveform of extra-high voltage direct-current thunderbolt locking is carried out finishing analysis, thunderbolt locking is summarized
Two ends current conversion station line voltage and the wave character of polar curve electric current and the motion characteristic of DC line protection in journey.
2) foundation includes two ends current conversion station and the extra-high voltage DC transmission system thunderbolt line up to thousands of miles transmission line of electricity
Road Simulation Calculation.DC power transmission line up to thousands of miles is divided into many segments, every a bit of line by certain length X
Road uses parameter to set up four wire transmission systems with the model of power transmission system that frequency changes and is simulated, the most a bit of
The two ends of circuit are accessed a module based on diode switching capacitance technology and are carried out the impact of transmission line simulation corona.Fig. 2 is
The schematic diagram of this module, this module is that a diode D is connected in series with charging capacitor C, the negative electrode of diode D and charging capacitor
The positive pole of C is connected, the minus earth of charging capacitor C, the anode connection electric transmission line of diode D, and electric capacity is precharged to rising of circuit
Corona voltage, after circuit lightning impulse voltage amplitude exceedes electric capacity pre-charge pressure, diode turns on automatically, and electric capacity is access in calculating
Loop, the big I of X determines according to the length of studied transmission line of electricity, but no more than 20km, the corona electricity of unit length
Appearance can carry out value by the transmission line of electricity unit length direct-to-ground capacitance of 100%, and discharge inception voltage is taken as 1000kV；One is utilized controlled to open
Close mimic bus insulator chain, when the voltage waveform at insulator chain two ends intersects with the volt-second characteristic of insulator, control
Switch conduction processed, analog insulation generation flashover；Utilize nonlinear resistance to the spark gap simulating in current conversion station, nonlinear resistance
C-V characteristic consistent with the C-V characteristic of spark gap；Utilize IGCT shunt capacitance the method adding direct-to-ground capacitance at its two ends
Simulate the Lightning Characteristic of converter valve；Utilize inductance in parallel electric capacity and add the method for direct-to-ground capacitance at its two ends flat to simulate
The Lightning Characteristic of wave reactor；Three tuning circuits utilizing electric capacity and inductance composition carry out analog DC wave filter；Utilization is subject to
Control current source parallel connection variable resistance simulates lightning channel, and controlled current source is used for simulating lightning current produced by lightning discharge
Source, according to the difference of lightning current polarity, lightning current waveform uses double indexes that the different wave head time is Tf and the wave rear time is Tt
Ripple is simulated, and its expression formula is as follows:
(1)
In formula: I is amplitude of lightning current
α is wave rear time constant, with TtApproximation relation be α ≈-0.69/Tt
β is wave-head time constant, with TfApproximation relation be β ≈-3.24/Tf
U (t) is unit jump function, at t > 0 time u (t)=1, during t≤0 u (t)=0.
According to formula (1) by by t1And t2Two lightning current waveforms the most in the same time are added can simulate the effect repeating thunderbolt,
Expression is as follows:
(2)
In formula: I1For at t1The amplitude of lightning current of the thunderbolt that the moment occurs
I2For at t2The amplitude of lightning current of the thunderbolt that the moment occurs
The arithmetical operation function module that Fig. 3 gives in the control system model utilizing electromagnetic transient state procedure EMTDC is built
The lightning current waveform generating functon as shown in formula (2).During calculating, the polarity according to thunder and lightning selects different lightning current waveforms, tool
Body is as follows: (a), for negative polarity thunder and lightning, the discharge capacity in lightning stroke process is smaller first, and its wave head time can be at 1 μ s-4 μ s
Between value, the wave rear time can between 40 μ s-50 μ s value, it is recommended that use the lightning current waveform of 2.6/50 μ s；(b) for
Positive polarity thunder and lightning, the discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, and its wave head time can be at 50 μ s-
Value between 200 μ s, the wave rear time can between 500 μ s-2000 μ s value, it is recommended that use the lightning current wave of 100/1000 μ s
Shape.Variable resistance is used for simulating lightning channel natural impedance, and its resistance changes with the size of amplitude of lightning current.
Utilize above-mentioned model that the thunderbolt DC line situation actually occurred is emulated, and by simulation result and step
(1) in, actual record ripple result is analyzed, and carries out the correlation computations parameter in phantom according to relative analysis result
Revise.
3) set up UHVDC converter station and measure system simulation model；
4) set up extra-high voltage direct-current control system and simplify phantom and the detailed phantom of route protection.In order to improve
The computational efficiency of phantom, only remains the control function that straight-flow system is most basic, determines electric current particularly as follows: retain in converting plant
Controlling function, retain in Inverter Station and determine voltage control function and determine gamma kick function, the parameter of all controllers is with actual
DC engineering is taken as unanimously.The acting characteristic of DC line protection has important impact to thunderbolt latch-up problem research, needs
To its detailed modeling.DC line protection emphasis is simulated traveling-wave protection, direct-current polar low-voltage variation and DC differential protection,
Each route protection all carries out man-to-man building according to the route protection program of actual DC engineering, it is ensured that built circuit
The concordance that protection model is protected with actual track.The output of this model feeds back to the thunderbolt circuit emulation that step (2) is set up
In computation model, for controlling the running status of straight-flow system.
5) frequency response characteristic A (ω) of UHVDC converter station potentiometer summation current transformer is studied, and to this spy
Property carries out the close approximation of rational function as the following formula
Current conversion station measurement apparatus imitative with above-mentioned Frequency Response can be set up by the transmission function module in EMTDC
True mode, the input of this model is step 2) the thunderbolt circuit emulation model calculated line voltage U that set updCHDirectly
Stream electric current IdCHAnd IdLHDeng, the output of this model can carry out corresponding computing after smoothing, filtering link and obtain step 4)
The controlled quentity controlled variable of required straight-flow system and the action decision content of route protection.Above-mentioned controlled quentity controlled variable and protection act amount are admitted to step
4) DC control and route protection model the information such as Trigger Angle α and locking order, above-mentioned letter will be obtained after logical operations
Breath is fed back to step 2) in thunderbolt circuit emulation model for controlling the running status of straight-flow system.
As it is shown in figure 1, by the above-mentioned steps 2 in the inventive method) → step 3) → step 4) → step 2) combine
Construct a closed-loop simulation system, it is achieved that thunderbolt circuit emulation computation model and DC control and route protection secondary system
The coupling real-time simulation of system phantom so that carry out transmission line of lightning strike and cause extra-high voltage direct-current system generation Closing mechanism to grind
Study carefully and become possibility.
6) when studying the lightning current shielding circuit various location of different amplitude, opposed polarity, extra-high voltage direct-current system closes
Lock situation.Respectively the latch status and reason suffering thunderbolt pole with perfect pole is studied:
6.1) research suffers the latch status of thunderbolt pole and is analyzed locking reason.For this problem again from whether
Thunderbolt pole two aspects of flashover are caused to study:
6.1.1) latch status when thunderbolt causes insulator string flashover and the analysis of causes.Adjust the amplitude of lightning current, make thunder
Hitting and cause this pole insulator chain flashover, in the current conversion station of record two ends, the change waveform of DC line protection action decision content, determines
Different protection act decision contents reach the moment of corresponding definite value, and combined circuit relay protective scheme block diagram is to protection act situation and reason
It is analyzed.
6.1.2) latch status when thunderbolt does not causes insulator string flashover and the analysis of causes.Positive and negative polarity is struck by lightning, point
Not adjusting the amplitude of lightning current, make thunderbolt can not cause this pole insulator chain flashover, in the current conversion station of record two ends, DC line is protected
Protect the change waveform of action decision content, determine whether different protection act decision content can reach corresponding definite value and reach definite value
Moment, in the case of all protection act decision contents all reach definite value, observe DC line protection action situation, in conjunction with
Protection act reason is analyzed by route protection logic diagram.
6.2) perfect after the lightning wave that pole induces occurs wave distortion along circuit communication process and cause this pole locking feelings
Condition and the analysis of causes.Positive and negative polarity is struck by lightning, perfects pole DC line protection action in the current conversion station of record two ends respectively and judge
The change waveform of amount, determines whether different protection act decision content can reach corresponding definite value and reach the moment of definite value, when
In the case of all protection act decision contents all reach definite value, observing the action situation of DC line protection, combined circuit is protected
Protection act situation and reason are analyzed by logic diagram.
Claims (5)
1. a transmission line of lightning strike causes the analysis method of extra-high voltage direct-current system generation locking, it is characterised in that include as follows
Step:
1) by extra-high voltage direct-current occurs that the actual record waveform of thunderbolt locking carry out finishing analysis, thunderbolt locking is summarized
Two ends current conversion station line voltage and the wave character of polar curve electric current and the motion characteristic of DC line protection in journey；
2) phantom of the thunderbolt circuit of extra-high voltage DC transmission system is set up；
3) set up UHVDC converter station and measure system simulation model；
4) set up extra-high voltage direct-current control system and simplify phantom and the detailed phantom of route protection；
5) by step 3) UHVDC converter station set up measures the input of system simulation model and accesses by step 2) thunderbolt
Line voltage that circuit emulation model obtains and the polar curve magnitude of current, by step 3) UHVDC converter station set up measures system
System phantom output is smoothed, send into step 4 as input quantity after wave filter link) DC control set up and line
Road protection model, the controlled quentity controlled variable producing DC transmission system after the logical operations of Control protection system is fed back to step 2) in
For controlling the running status of DC transmission system, thus measure system using current conversion station and just constitute more than one as tie
State step 2) → step 3) → step 4) → step 2) closed loop real-time emulation system, it is achieved that thunderbolt circuit emulation computation model
With DC control and route protection electrical secondary system phantom couple real-time simulation so that carry out transmission line of lightning strike and cause spy
The research of high-voltage direct current generation Closing mechanism becomes possibility；
6) by thunderbolt pole with perfect pole and closed during the lightning current shielding circuit various location of the different amplitude of research, opposed polarity
Lock situation, and combined circuit protection course of action locking reason is analyzed.
Transmission line of lightning strike the most according to claim 1 causes the analysis method of extra-high voltage direct-current system generation locking, its
Be characterised by above-mentioned steps 2) in establish one and include two ends current conversion station and up to the extra-high straightening of thousands of miles transmission line of electricity
Stream transmission system thunderbolt circuit emulation computation model, concrete grammar is as follows:
By certain length X, the DC power transmission line up to thousands of miles is divided into many segments, and every a bit of circuit uses parameter
Set up four wire transmission systems with the model of power transmission system of frequency change to be simulated, the two ends of every a bit of circuit
Accessing a module based on diode switching capacitance technology and carry out the impact of transmission line simulation corona, this module is two poles
Pipe is connected in series with charging capacitor, and the negative electrode of diode is connected with the positive pole of charging capacitor, the minus earth of charging capacitor, and two
The anode connection electric transmission line of pole pipe, electric capacity is precharged to the discharge inception voltage of circuit, when circuit lightning impulse voltage amplitude exceedes electricity
After holding pre-charge pressure, diode turns on automatically, and electric capacity is access in counter circuit；A gate-controlled switch is utilized to carry out mimic bus insulation
Substring, when the voltage waveform at insulator chain two ends intersects with the volt-second characteristic of insulator, controls switch conduction, and simulation is absolutely
Edge generation flashover；Utilizing nonlinear resistance to the spark gap simulating in current conversion station, the C-V characteristic of nonlinear resistance is with lightning-arrest
The C-V characteristic of device is consistent；Utilize IGCT shunt capacitance and add the method for direct-to-ground capacitance at its two ends to simulate the thunder of converter valve
Surge characteristic；Utilize inductance in parallel electric capacity and add the method for direct-to-ground capacitance at its two ends to simulate the thunder and lightning punching of smoothing reactor
Hit characteristic；Three tuning circuits utilizing electric capacity and inductance composition carry out analog DC wave filter；Utilize controlled current source parallel connection variable
Resistance simulates lightning channel, and controlled current source is used for simulating lightning current source produced by lightning discharge, according to lightning current polarity
Difference, lightning current waveform uses the different wave head time to be TfIt is T with the wave rear timetDouble exponential waves be simulated, its expression formula
As follows:
In formula: I is amplitude of lightning current
α is wave rear time constant, with TtApproximation relation be α ≈-0.69/Tt
β is wave-head time constant, with TfApproximation relation be β ≈-3.24/Tf
U (t) is unit jump function, at t > 0 time u (t)=1, during t≤0 u (t)=0；
According to formula (1) by by t1And t2Two lightning current waveforms the most in the same time are added the effect repeating thunderbolt of can simulating, specifically
Expression formula is as follows:
In formula: I1For at t1The amplitude of lightning current of the thunderbolt that the moment occurs
I2For at t2The amplitude of lightning current of the thunderbolt that the moment occurs
The arithmetical operation function module in control system model according to the available electromagnetic transient state procedure EMTDC of formula (2) builds thunder
Current waveform generating functon；Variable resistance is used for simulating lightning channel natural impedance, and its resistance becomes with the size of amplitude of lightning current
Change.
Transmission line of lightning strike the most according to claim 2 causes the analysis method of extra-high voltage direct-current system generation locking, its
It is characterised by that the above-mentioned difference according to lightning current polarity chooses the lightning current waveform of different wave head wave rear time, the specifically side of choosing
Method is as follows:
A (), for negative polarity thunder and lightning, the discharge capacity in lightning stroke process is smaller first, its wave head time takes between 1 μ s-4 μ s
Value, the wave rear time is value between 40 μ s-50 μ s, it is recommended that use the lightning current waveform of 2.6/50 μ s；
B (), for positive polarity thunder and lightning, the discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, during its wave head
Between between 50 μ s-200 μ s value, the wave rear time is value between 500 μ s-2000 μ s, it is recommended that use the thunder of 100/1000 μ s
Current waveform；
Transmission line of lightning strike according to claim 2 causes the analysis method of extra-high voltage direct-current system generation locking, and it is special
Levy and be by by t1And t2Two lightning current waveform phase Calais simulations the most in the same time repeat the effect of thunderbolt.
Transmission line of lightning strike the most according to claim 1 causes the analysis method of extra-high voltage direct-current system generation locking, its
Be characterised by above-mentioned steps 3) in by current conversion station measure system modeling achieve step 2) thunderbolt circuit emulation model with
Step 4) control and the coupling of route protection model, thus establish a research thunderbolt and cause extra-high voltage direct-current system to close
The closed loop real-time emulation system of lock machine reason, concrete grammar is as follows:
By studying the frequency response characteristic of UHVDC converter station potentiometer summation current transformer, and this characteristic is had
The close approximation of reason function, sets up the phantom of current conversion station measurement apparatus, this mould by the transmission function module in EMTDC
The input of type is step 2) the thunderbolt line voltage that obtains of circuit emulation model and the polar curve magnitude of current, the output of this model is passed through
Carry out corresponding computing after smooth, filtering link and i.e. can get the controlled quentity controlled variable of straight-flow system and the actuating quantity of route protection, above-mentioned
Controlled quentity controlled variable and protection act amount are admitted to step 3) DC control and route protection model will be touched after logical operations
Send out the information such as angle α and locking order, above-mentioned information is fed back to step 2) thunderbolt circuit emulation model in be used for controlling direct current system
The running status of system；Above-mentioned steps 2) → step 3) → step 4) → step 2) the closed loop real-time emulation system that forms achieves thunder
That hits circuit emulation computation model and DC control and route protection electrical secondary system phantom couples real-time simulation so that carry out
Transmission line of lightning strike causes the research of extra-high voltage direct-current system generation Closing mechanism to become possibility.
Transmission line of lightning strike the most according to claim 1 causes the analysis method of extra-high voltage direct-current system generation locking, its
It is characterised by above-mentioned steps 6) in, not only have studied the latch status of the pole that suffers to be struck by lightning, be investigated and perfect pole line influence and go out
Lightning wave along circuit communication process, there is wave distortion after cause this to perfect pole DC line protection misoperation, thus occur
The situation of locking, for suffering thunderbolt pole to have studied direct current system when thunderbolt causes line flashover and do not causes line flashover the most respectively
The latch status of system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101622463B1 (en) * | 2014-05-13 | 2016-05-18 | 엘에스산전 주식회사 | Apparatus and method for insulation design of high voltage direct current transmission system |
| KR101622462B1 (en) * | 2014-05-13 | 2016-05-18 | 엘에스산전 주식회사 | Apparatus and method for insulation design of high voltage direct current transmission system |
| CN104269839B (en) * | 2014-10-14 | 2016-08-17 | 南方电网科学研究院有限责任公司 | Ultra-high voltage direct current line traveling wave protection lightning stroke prevention processing method and processing equipment |
| CN104537186B (en) * | 2015-01-09 | 2017-07-18 | 南方电网科学研究院有限责任公司 | Method for simulating lightning stroke transient process of extra-high voltage direct current transmission line |
| CN106526418B (en) * | 2016-11-04 | 2019-04-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of conventional high-pressure DC transmission system converter valve trigger circuit closed-loop control system, control method and Fault Locating Method |
| CN109470989A (en) * | 2018-10-11 | 2019-03-15 | 昆明理工大学 | A kind of lightning fault route selection and localization method based on the part 110kV multiple-circuit on same tower |
| CN109193648B (en) * | 2018-10-23 | 2021-02-19 | 中国南方电网有限责任公司超高压输电公司百色局 | MOV (metal oxide varistor) whole-group matching method for series compensation device of ultra-high voltage transmission line |
| CN109598038A (en) * | 2018-11-21 | 2019-04-09 | 宁波恒晨电力建设有限公司 | Lightning-strike effectiveness analysis method and device |
| CN112287572B (en) * | 2019-07-09 | 2023-10-31 | 中国航发商用航空发动机有限责任公司 | Complex system and lightning stroke direct effect protection optimization and verification method and device thereof |
| CN111651952B (en) * | 2020-03-16 | 2022-12-13 | 西安交通大学 | Calculation method for lightning current characteristics of pole-holding communication system |
| CN113919183B (en) * | 2021-12-13 | 2022-04-12 | 国网江西省电力有限公司电力科学研究院 | RTDS-based method and device for simulating lightning stroke fault response characteristics of direct current control protection system |
| CN115575772B (en) * | 2022-11-21 | 2023-03-14 | 昆明理工大学 | Transient zero modulus identification method for lightning shielding failure and counterattack of power transmission line |
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| EP2605358A1 (en) * | 2010-06-30 | 2013-06-19 | State Grid Corporation of China | Wire connecting method and converter station for ultra-high voltage direct current power transmission, and ultra-high voltage direct current power transmission system |
| CN103296673A (en) * | 2013-05-09 | 2013-09-11 | 国家电网公司 | Debugging method for +/- 800 kV ultra-high voltage direct-current transmission project system |
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| EP2605358A1 (en) * | 2010-06-30 | 2013-06-19 | State Grid Corporation of China | Wire connecting method and converter station for ultra-high voltage direct current power transmission, and ultra-high voltage direct current power transmission system |
| CN103296673A (en) * | 2013-05-09 | 2013-09-11 | 国家电网公司 | Debugging method for +/- 800 kV ultra-high voltage direct-current transmission project system |
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