CN103530453A - Method for analyzing ultra-high voltage direct current system lockout caused by lightning stroke of electric transmission line - Google Patents
Method for analyzing ultra-high voltage direct current system lockout caused by lightning stroke of electric transmission line Download PDFInfo
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Abstract
The invention discloses a method for analyzing ultra-high voltage direct current system lockout caused by a lightning stroke of an electric transmission line. The method comprises the first step of summarizing electric quantity characteristics and direct current circuit protection action characteristics in the lightning stroke lockout process, the second step of establishing an ultra-high voltage direct current system lightning stroke simulation model, the third step of establishing a converter station measuring system simulation model, the fourth step of establishing a control system and circuit protection simulation model, the fifth step of combining the three simulation models to form a closed loop real-time simulation system, and the sixth step of studying the ultra-high voltage direct current lockout situation caused by the lightning stroke by utilizing the simulation system. A lightning stroke simulation modeling method of an ultra-high voltage direct current power transmission system in a circuit with the length reaching to thousands of kilometers is put forward, the coupling real-time simulation of the lightning stroke simulation model and the circuit protection simulation model is achieved, and an effective means is provided for studying the ultra-high voltage direct current system lightning stroke lockout mechanism and optimizing the direct current transmission line protection definite value.
Description
Technical field
The present invention relates to a kind of analytical approach that transmission line of lightning strike causes extra-high voltage direct-current system generation Closing mechanism of studying, belong 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, be the main implementation of China's transferring electricity from the west to the east strategy, and extra-high voltage direct-current transmission is large with its transmission capacity, the little feature of loss is adopted by increasing DC engineering.UHVDC Transmission Lines length is long, the regional landform of passing through and meteorological complicated condition along the line, and the locking of being easily struck by lightning, thus the safe and stable operation of the system of giving has brought stern challenge.The wide extra-high voltage direct-current of cloud is first extra-high voltage direct-current transmission engineering in the world, just once occurs twice because thunderbolt one utmost point causes the two poles of the earth situation of locking in succession in four years of putting into operation at it.Therefore, research extra-high voltage direct-current system thunderbolt Closing mechanism, and take corresponding counter-measure will be conducive to improve extra-high voltage direct-current system operation reliability, reduce system operation risk.
At present; research for thunderbolt DC line focuses mostly on aspect the lightning flashover rate calculating of the calculating of inlet wire section Lightning Incoming Wave and DC line; be mainly used in determining the lightning impulse dielectric level of change of current station equipment and the reliability of DC line insulation; and in check to DC line protection is calculated, all there is no a lightning stroke flashover process of transmission line simulation; just at place, trouble spot, directly add shorted to earth fault, reckon without the travelling waves of lightning wave in lightning stroke process to protecting the impact of acting characteristic.Therefore, be badly in need of proposing the analytical approach that a kind of transmission line of lightning strike causes extra-high voltage direct-current system generation Closing mechanism.
Summary of the invention
The object of the invention is to propose the analytical approach that a kind of transmission line of lightning strike causes extra-high voltage direct-current system generation locking, the present invention has overcome in current DC line protection check calculating can not consider the defect of the capable ripple of thunder and lightning on the impact of protection acting characteristic.
Transmission line of lightning strike of the present invention causes the analytical approach of extra-high voltage direct-current system generation locking, comprises the steps:
1) by extra-high voltage direct-current is occurred to for the actual record waveform of thunderbolt locking, carry out finishing analysis, summarize two ends current conversion station polar curve voltage and the waveform character of polar curve electric current and the motion characteristic of DC line protection in thunderbolt locking process;
2) set up the realistic model of the thunderbolt circuit of extra-high voltage DC transmission system;
3) set up UHVDC converter station measuring system realistic model;
4) set up the detailed realistic model that extra-high voltage direct-current control system is simplified realistic model and route protection;
5) the input end access of the UHVDC converter station measuring system realistic model of step 3) being set up is by step 2) the thunderbolt resulting polar curve voltage of circuit emulation model and the polar curve magnitude of current, the output quantity of the UHVDC converter station measuring system realistic model that step 3) is set up is through level and smooth, after wave filter link, as input quantity, send into DC control and the route protection model that step 4) is set up, the controlled quentity controlled variable that produces DC transmission system after logical operation through controlling protection system is fed back to step 2) in for controlling the running status of DC transmission system, the current conversion station measuring system of so just usining has just formed one with above-mentioned steps 2 as tie) → step 3) → step 4) → step 2) closed loop real-time emulation system, realized the coupling real-time simulation of thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system realistic model, make to carry out transmission line of lightning strike and cause that the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility,
6) be struck by lightning while studying the lightning current shielding circuit diverse location place of different amplitudes, the opposed polarity utmost point and perfect the locking situation of the utmost point, and the course of action of combined circuit protection is analyzed locking reason.
Above-mentioned steps 2) in, set up an extra-high voltage DC transmission system thunderbolt circuit emulation computation model that comprises two ends current conversion station and reach thousands of kilometers of transmission lines of electricity, concrete grammar is as follows:
The DC power transmission line that reaches thousands of kilometers is divided into many segments by certain length X, every a bit of circuit adopts parameter to set up four wire transmission systems with the model of power transmission system of frequency change and simulates, the impact that a module based on diode switching capacitance technology is carried out transmission line simulation corona is accessed at the two ends of every a bit of circuit, this module is being connected in series of a diode and charging capacitor, the negative electrode of diode is connected with the positive pole of charging capacitor, the minus earth of charging capacitor, the anode connection electric transmission line of diode, electric capacity is precharged to the discharge inception voltage of circuit, the automatic conducting of diode after circuit lightning impulse voltage amplitude surpasses electric capacity pre-charge pressure, electric capacity is access in counter circuit, utilize a gate-controlled switch to carry out analog line insulator chain, when the voltage waveform at insulator chain two ends and the volt-second characteristic of insulator intersect, gauge tap conducting, there is flashover in analog insulation, utilize non-linear resistance to simulate the lightning arrester in current conversion station, the volt-ampere characteristic of non-linear resistance is consistent with the volt-ampere characteristic of lightning arrester, the method of utilizing thyristor shunt capacitance and adding ground capacitance at its two ends is simulated the Lightning Characteristic of converter valve, the method of utilizing inductance in parallel electric capacity and adding ground capacitance at its two ends is simulated the Lightning Characteristic of smoothing reactor, three tuned circuits that utilize electric capacity and inductance to form carry out analog DC wave filter, utilize controlled current source variable resistor in parallel to simulate lightning channel, controlled current source is for simulating the lightning current source that lightning discharge produces, and according to the difference of lightning current polarity, it is T that lightning current waveform adopts the different wave head time
fwith the wave rear time be T
ttwo exponential waves simulate, its expression formula is as follows:
(1)
In formula: I is amplitude of lightning current
α is wave rear time constant, with T
tapproximation relation be α ≈-0.69/T
t
β is wave-head time constant, with T
fapproximation relation be β ≈-3.24/T
f
U (t) is unit-step function, at t > 0 o'clock u (t)=1, t≤0 o'clock u (t)=0;
According to formula (1), pass through t
1and t
2two not lightning current waveform be in the same time added and can simulate the effect that repeats thunderbolt, expression is as follows:
In formula: I
1for at t
1the amplitude of lightning current of the thunderbolt constantly occurring
I
2for at t
2the amplitude of lightning current of the thunderbolt constantly occurring
According to formula (2), can utilize the arithmetical operation function module in the control system model of electromagnetic transient state procedure EMTDC to build lightning current waveform generation function; Variable resistor is used for simulating lightning channel wave impedance, and its resistance changes with the size of amplitude of lightning current.
The above-mentioned difference according to lightning current polarity is chosen the lightning current waveform of different wave head wave rear times, and concrete choosing method 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 is value between 1 μ s-4 μ s, and the wave rear time is value between 40 μ s-50 μ s, the lightning current waveform of recommend adoption 2.6/50 μ s;
(b) for positive polarity thunder and lightning, discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, its 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, the lightning current waveform of recommend adoption 100/1000 μ s;
By by t
1and t
2two not the simulation of lightning current waveform phase Calais in the same time repeat the effect of thunderbolt.
Above-mentioned steps 5) in by the modeling of current conversion station measuring system has been realized to step 2) coupling of the control of thunderbolt circuit emulation model and step 4) and route protection model; thereby set up one and studied the closed loop real-time emulation system that thunderbolt causes extra-high voltage direct-current system generation Closing mechanism, concrete grammar is as follows:
By the frequency response characteristic of research UHVDC converter station voltage divider summation current transformer, and this characteristic is carried out to the close approximation of rational function, by the transport function module in EMTDC, set up the realistic model of current conversion station measurement mechanism, this model be input as step 2) the thunderbolt resulting polar curve voltage of circuit emulation model and the polar curve magnitude of current, the output of this model is through level and smooth, after filtering link, carry out corresponding computing and can obtain the controlled quentity controlled variable of straight-flow system and the actuating quantity of route protection, above-mentioned controlled quentity controlled variable and protection actuating quantity are admitted to step 3) DC control and route protection model and after logical operation, will obtain the information such as Trigger Angle α and locking order, above-mentioned information is fed back to step 2) in thunderbolt circuit emulation model for controlling the running status of straight-flow system, above-mentioned steps 2) the closed loop real-time emulation system → step 3) → step 4) → step 2) forming has been realized the coupling real-time simulation of thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system realistic model, makes to carry out transmission line of lightning strike and causes that the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility.
Above-mentioned steps 6) in; not only studied the locking situation of the utmost point that is struck by lightning; also studied and perfected lightning wave that utmost point line influence goes out along occurring to cause this utmost point DC line protection misoperation after wave form distortion in circuit communication process; thereby there is the situation of locking, the locking situation of straight-flow system while also having studied respectively for the utmost point that is struck by lightning that thunderbolt causes line flashover and do not cause line flashover.
Beneficial effect of the present invention is as follows: the present invention is integrated in be struck by lightning circuit emulation model and UHVDC Transmission Lines protection model of extra-high voltage DC transmission system in a model; realize the coupling real-time simulation of two models; overcome in current DC line protection check calculating and can not consider the defect of the capable ripple of thunder and lightning on the impact of protection acting characteristic, for transmission line of lightning strike, caused that the mechanism research of extra-high voltage direct-current system generation locking provides a kind of effective means.Utilize the method to carry out the research of extra-high voltage direct-current system thunderbolt latch-up problem and can provide foundation for the optimization of protection of direct current supply line principle and definite value adjustment, thereby be conducive to improve extra-high voltage direct-current system operation reliability, reduction system operation risk.
Accompanying drawing explanation
Fig. 1 is 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 process flow diagram of the inventive method.
Embodiment
With reference to accompanying drawing, this method is described in detail:
1) by the actual record waveform of extra-high voltage direct-current thunderbolt locking is carried out to finishing analysis, summarize two ends current conversion station polar curve voltage and the waveform character of polar curve electric current and the motion characteristic of DC line protection in thunderbolt locking process.
2) set up the extra-high voltage DC transmission system thunderbolt circuit emulation computation model that comprises two ends current conversion station and reach thousands of kilometers of transmission lines of electricity.The DC power transmission line that reaches thousands of kilometers is divided into many segments by certain length X, every a bit of circuit adopts parameter to set up four wire transmission systems with the model of power transmission system of frequency change and simulates, and the impact that a module based on diode switching capacitance technology is carried out transmission line simulation corona is accessed at the two ends of every a bit of circuit.Fig. 2 is the schematic diagram of this module, this module is that a diode D and charging capacitor C are connected in series, the negative electrode of diode D is connected with the positive pole of charging capacitor C, the minus earth of charging capacitor C, the anode connection electric transmission line of diode D, electric capacity is precharged to the discharge inception voltage of circuit, the automatic conducting of diode after circuit lightning impulse voltage amplitude surpasses electric capacity pre-charge pressure, electric capacity is access in counter circuit, the large I of X is determined according to the length of studied transmission line of electricity, but should not surpass 20km, the corona electric capacity of unit length can carry out value by 100% transmission line of electricity unit length ground capacitance, discharge inception voltage is taken as 1000kV, utilize a gate-controlled switch to carry out analog line insulator chain, when the voltage waveform at insulator chain two ends and the volt-second characteristic of insulator intersect, gauge tap conducting, there is flashover in analog insulation, utilize non-linear resistance to simulate the lightning arrester in current conversion station, the volt-ampere characteristic of non-linear resistance is consistent with the volt-ampere characteristic of lightning arrester, the method of utilizing thyristor shunt capacitance and adding ground capacitance at its two ends is simulated the Lightning Characteristic of converter valve, the method of utilizing inductance in parallel electric capacity and adding ground capacitance at its two ends is simulated the Lightning Characteristic of smoothing reactor, three tuned circuits that utilize electric capacity and inductance to form carry out analog DC wave filter, utilize controlled current source variable resistor in parallel to simulate lightning channel, controlled current source is for simulating the lightning current source that lightning discharge produces, according to the difference of lightning current polarity, it is Tf and wave rear time to be Tt two exponential waves are simulated that lightning current waveform adopts the different wave head time, and its expression formula is as follows:
(1)
In formula: I is amplitude of lightning current
α is wave rear time constant, with T
tapproximation relation be α ≈-0.69/T
t
β is wave-head time constant, with T
fapproximation relation be β ≈-3.24/T
f
U (t) is unit-step function, at t > 0 o'clock u (t)=1, t≤0 o'clock u (t)=0.
According to formula (1), pass through t
1and t
2two not lightning current waveform be in the same time added and can simulate the effect that repeats thunderbolt, expression is as follows:
(2)
In formula: I
1for at t
1the amplitude of lightning current of the thunderbolt constantly occurring
I
2for at t
2the amplitude of lightning current of the thunderbolt constantly occurring
Fig. 3 provided that arithmetical operation function module in the control system model that utilizes electromagnetic transient state procedure EMTDC builds suc as formula the lightning current waveform generation function shown in (2).During calculating, according to the polarity of thunder and lightning, select different lightning current waveforms, specific as follows: (a) for negative polarity thunder and lightning, discharge capacity in lightning stroke process is smaller first, its wave head time can be between 1 μ s-4 μ s value, the wave rear time can be between 40 μ s-50 μ s value, the lightning current waveform of recommend adoption 2.6/50 μ s; (b) for positive polarity thunder and lightning, discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, its wave head time can be between 50 μ s-200 μ s value, the wave rear time can be between 500 μ s-2000 μ s value, the lightning current waveform of recommend adoption 100/1000 μ s.Variable resistor is used for simulating lightning channel wave impedance, and its resistance changes with the size of amplitude of lightning current.
The thunderbolt DC line situation of utilizing above-mentioned model to occur reality is carried out emulation, and actual record ripple result in simulation result and step (1) is analyzed, and according to comparative analysis result, the correlation computations parameter in realistic model is revised.
3) set up UHVDC converter station measuring system realistic model;
4) set up the detailed realistic model that extra-high voltage direct-current control system is simplified realistic model and route protection.In order to improve the counting yield of realistic model, only retained the most basic control function of straight-flow system, be specially: in converting plant, retain and determine Current Control function, in Inverter Station, retain and determine voltage control function and determine gamma kick function, the parameter of all controllers is taken as consistent with actual DC engineering.On thunderbolt latch-up problem, research has important impact to the acting characteristic of DC line protection, need to be to its detailed modeling.DC line protection emphasis has been simulated to 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, guaranteed the consistance of the route protection model of building and actual track protection.The output of this model feeds back in the thunderbolt circuit emulation computation model that step (2) sets up, for controlling the running status of straight-flow system.
5) frequency response characteristic of research UHVDC converter station voltage divider summation current transformer
a(
ω), and this characteristic is carried out to the close approximation of rational function by following formula
By the transport function module in EMTDC, can set up the realistic model of the current conversion station measurement mechanism with above-mentioned Frequency Response, this model be input as step 2) the polar curve voltage U that calculates of the thunderbolt circuit emulation model set up
dCHwith DC current I
dCHand I
dLHdeng, the output of this model, through carrying out corresponding computing after level and smooth, filtering link, obtain step 4) the required controlled quentity controlled variable of straight-flow system and the action decision content of route protection.Above-mentioned controlled quentity controlled variable and protection actuating quantity are admitted to step 4) DC control and route protection model and after logical operation, will obtain the information such as Trigger Angle α and locking order, and above-mentioned information is fed back to step 2) in thunderbolt circuit emulation model for controlling the running status of straight-flow system.
As shown in Figure 1; by the above-mentioned steps in the inventive method 2) → step 3) → step 4) → step 2) combine the closed-loop simulation system that built; realized the coupling real-time simulation of thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system realistic model, made to carry out transmission line of lightning strike and cause that the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility.
6) the locking situation of extra-high voltage direct-current system while studying the lightning current shielding circuit diverse location place of different amplitudes, opposed polarity.Respectively the utmost point that is struck by lightning is studied with the locking situation and the reason that perfect the utmost point:
6.1) the be struck by lightning locking situation of the utmost point locking reason is analyzed of research.For this problem again from whether causing thunderbolt two aspects of utmost point flashover to study:
Locking situation and the analysis of causes when 6.1.1) thunderbolt causes insulator string flashover.Adjust the amplitude of lightning current; make thunderbolt cause this utmost point insulator chain flashover; record the variation waveform of DC line protection action decision content in the current conversion station of two ends; determine that different protection action decision contents reach the moment of corresponding definite value, combined circuit protection logic diagram is analyzed protection action situation and reason.
Locking situation and the analysis of causes when 6.1.2) thunderbolt does not cause insulator string flashover.For positive and negative polarity thunderbolt; adjust respectively the amplitude of lightning current; make thunderbolt can not cause this utmost point insulator chain flashover; record the variation waveform of DC line protection action decision content in the current conversion station of two ends; determine the different moment of protecting action decision contents whether can reach corresponding definite value and reaching definite value; when all protection action decision contents all reach in the situation of definite value, observe the action situation of DC line protection, combined circuit protection logic diagram is analyzed protection action reason.
6.2) perfect lightning wave that the utmost point induces along occurring to cause this utmost point locking situation and analysis of causes after wave form distortion in circuit communication process.For positive and negative polarity thunderbolt; record respectively the variation waveform that perfects utmost point DC line protection action decision content in the current conversion station of two ends; determine the different moment of protecting action decision contents whether can reach corresponding definite value and reaching definite value; when all protection action decision contents all reach in the situation of definite value; observe the action situation of DC line protection, combined circuit protection logic diagram is analyzed protection action situation and reason.
Claims (5)
1. transmission line of lightning strike causes an analytical approach for extra-high voltage direct-current system generation locking, it is characterized in that comprising the steps:
1) by extra-high voltage direct-current is occurred to for the actual record waveform of thunderbolt locking, carry out finishing analysis, summarize two ends current conversion station polar curve voltage and the waveform character of polar curve electric current and the motion characteristic of DC line protection in thunderbolt locking process;
2) set up the realistic model of the thunderbolt circuit of extra-high voltage DC transmission system;
3) set up UHVDC converter station measuring system realistic model;
4) set up the detailed realistic model that extra-high voltage direct-current control system is simplified realistic model and route protection;
5) the input end access of the UHVDC converter station measuring system realistic model of step 3) being set up is by step 2) the thunderbolt resulting polar curve voltage of circuit emulation model and the polar curve magnitude of current, the output quantity of the UHVDC converter station measuring system realistic model that step 3) is set up is through level and smooth, after wave filter link, as input quantity, send into DC control and the route protection model that step 4) is set up, the controlled quentity controlled variable that produces DC transmission system after logical operation through controlling protection system is fed back to step 2) in for controlling the running status of DC transmission system, the current conversion station measuring system of so just usining has just formed one with above-mentioned steps 2 as tie) → step 3) → step 4) → step 2) closed loop real-time emulation system, realized the coupling real-time simulation of thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system realistic model, make to carry out transmission line of lightning strike and cause that the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility,
6) be struck by lightning while studying the lightning current shielding circuit diverse location place of different amplitudes, the opposed polarity utmost point and perfect the locking situation of the utmost point, and the course of action of combined circuit protection is analyzed locking reason.
2. transmission line of lightning strike according to claim 1 causes the analytical approach of extra-high voltage direct-current system generation locking, it is characterized in that above-mentioned steps 2) in set up an extra-high voltage DC transmission system thunderbolt circuit emulation computation model that comprises two ends current conversion stations and reach thousands of kilometers of transmission lines of electricity, concrete grammar is as follows:
The DC power transmission line that reaches thousands of kilometers is divided into many segments by certain length X, every a bit of circuit adopts parameter to set up four wire transmission systems with the model of power transmission system of frequency change and simulates, the impact that a module based on diode switching capacitance technology is carried out transmission line simulation corona is accessed at the two ends of every a bit of circuit, this module is being connected in series of a diode and charging capacitor, the negative electrode of diode is connected with the positive pole of charging capacitor, the minus earth of charging capacitor, the anode connection electric transmission line of diode, electric capacity is precharged to the discharge inception voltage of circuit, the automatic conducting of diode after circuit lightning impulse voltage amplitude surpasses electric capacity pre-charge pressure, electric capacity is access in counter circuit, utilize a gate-controlled switch to carry out analog line insulator chain, when the voltage waveform at insulator chain two ends and the volt-second characteristic of insulator intersect, gauge tap conducting, there is flashover in analog insulation, utilize non-linear resistance to simulate the lightning arrester in current conversion station, the volt-ampere characteristic of non-linear resistance is consistent with the volt-ampere characteristic of lightning arrester, the method of utilizing thyristor shunt capacitance and adding ground capacitance at its two ends is simulated the Lightning Characteristic of converter valve, the method of utilizing inductance in parallel electric capacity and adding ground capacitance at its two ends is simulated the Lightning Characteristic of smoothing reactor, three tuned circuits that utilize electric capacity and inductance to form carry out analog DC wave filter, utilize controlled current source variable resistor in parallel to simulate lightning channel, controlled current source is for simulating the lightning current source that lightning discharge produces, and according to the difference of lightning current polarity, it is T that lightning current waveform adopts the different wave head time
fwith the wave rear time be T
ttwo exponential waves simulate, its expression formula is as follows:
In formula: I is amplitude of lightning current
α is wave rear time constant, with T
tapproximation relation be α ≈-0.69/T
t
β is wave-head time constant, with T
fapproximation relation be β ≈-3.24/T
f
U (t) is unit-step function, at t > 0 o'clock u (t)=1, t≤0 o'clock u (t)=0;
According to formula (1), pass through t
1and t
2two not lightning current waveform be in the same time added and can simulate the effect that repeats thunderbolt, expression is as follows:
In formula: I
1for at t
1the amplitude of lightning current of the thunderbolt constantly occurring
I
2for at t
2the amplitude of lightning current of the thunderbolt constantly occurring
According to formula (2), can utilize the arithmetical operation function module in the control system model of electromagnetic transient state procedure EMTDC to build lightning current waveform generation function; Variable resistor is used for simulating lightning channel wave impedance, and its resistance changes with the size of amplitude of lightning current.
3. transmission line of lightning strike according to claim 2 causes the analytical approach of extra-high voltage direct-current system generation locking, it is characterized in that the above-mentioned difference according to lightning current polarity chooses the lightning current waveform of different wave head wave rear times, and concrete choosing method 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 is value between 1 μ s-4 μ s, and the wave rear time is value between 40 μ s-50 μ s, the lightning current waveform of recommend adoption 2.6/50 μ s;
(b) for positive polarity thunder and lightning, discharge capacity in lightning stroke process is much larger than the discharge capacity of negative polarity thunderbolt first, its 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, the lightning current waveform of recommend adoption 100/1000 μ s;
Transmission line of lightning strike according to claim 2 causes the analytical approach of extra-high voltage direct-current system generation locking, it is characterized in that by by t
1and t
2two not the simulation of lightning current waveform phase Calais in the same time repeat the effect of thunderbolt.
4. transmission line of lightning strike according to claim 1 causes the analytical approach of extra-high voltage direct-current system generation locking; it is characterized in that above-mentioned steps 5) in by the modeling of current conversion station measuring system has been realized to step 2) coupling of the control of thunderbolt circuit emulation model and step 4) and route protection model; thereby set up one and studied the closed loop real-time emulation system that thunderbolt causes extra-high voltage direct-current system generation Closing mechanism, concrete grammar is as follows:
By the frequency response characteristic of research UHVDC converter station voltage divider summation current transformer, and this characteristic is carried out to the close approximation of rational function, by the transport function module in EMTDC, set up the realistic model of current conversion station measurement mechanism, this model be input as step 2) the thunderbolt resulting polar curve voltage of circuit emulation model and the polar curve magnitude of current, the output of this model is through level and smooth, after filtering link, carry out corresponding computing and can obtain the controlled quentity controlled variable of straight-flow system and the actuating quantity of route protection, above-mentioned controlled quentity controlled variable and protection actuating quantity are admitted to step 3) DC control and route protection model and after logical operation, will obtain the information such as Trigger Angle α and locking order, above-mentioned information is fed back to step 2) in thunderbolt circuit emulation model for controlling the running status of straight-flow system, above-mentioned steps 2) the closed loop real-time emulation system → step 3) → step 4) → step 2) forming has been realized the coupling real-time simulation of thunderbolt circuit emulation computation model and DC control and route protection electrical secondary system realistic model, makes to carry out transmission line of lightning strike and causes that the research of extra-high voltage direct-current system generation Closing mechanism becomes possibility.
5. transmission line of lightning strike according to claim 1 causes the analytical approach of extra-high voltage direct-current system generation locking; it is characterized in that above-mentioned steps 6) in; not only studied the locking situation of the utmost point that is struck by lightning; also studied and perfected lightning wave that utmost point line influence goes out along occurring to cause this utmost point DC line protection misoperation after wave form distortion in circuit communication process; thereby there is the situation of locking, the locking situation of straight-flow system while also having studied respectively for the utmost point that is struck by lightning that thunderbolt causes line flashover and do not cause line flashover.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104269839A (en) * | 2014-10-14 | 2015-01-07 | 南方电网科学研究院有限责任公司 | Ultra-high voltage direct current line travelling-wave protection lightning stroke preventing and handling method and device |
| CN104537186A (en) * | 2015-01-09 | 2015-04-22 | 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 |
| CN105098814A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Apparatus and method for insulation design of high voltage direct current transmission system |
| CN105098821A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Apparatus and method for insulation design of high voltage direct current transmission system |
| CN106526418A (en) * | 2016-11-04 | 2017-03-22 | 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 | Closed-loop control system of converter valve trigger circuit of conventional high-voltage direct-current power transmission system, and control method and fault positioning method thereof |
| CN109193648A (en) * | 2018-10-23 | 2019-01-11 | 中国南方电网有限责任公司超高压输电公司百色局 | Super UHV transmission line series compensation device MOV whole group method for group matching |
| 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 |
| 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 |
| CN111651952A (en) * | 2020-03-16 | 2020-09-11 | 西安交通大学 | Calculation method for lightning current characteristics of pole-holding communication system |
| CN112287572A (en) * | 2019-07-09 | 2021-01-29 | 中国航发商用航空发动机有限责任公司 | Complex system and method and device for optimizing and verifying lightning stroke direct effect protection of complex system |
| CN113919183A (en) * | 2021-12-13 | 2022-01-11 | 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 |
| CN115575772A (en) * | 2022-11-21 | 2023-01-06 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098814A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Apparatus and method for insulation design of high voltage direct current transmission system |
| CN105098821A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Apparatus and method for insulation design of high voltage direct current transmission system |
| CN105098821B (en) * | 2014-05-13 | 2017-12-22 | Ls产电株式会社 | Apparatus and method for the insulating Design of HVDC transmission system |
| CN104269839A (en) * | 2014-10-14 | 2015-01-07 | 南方电网科学研究院有限责任公司 | Ultra-high voltage direct current line travelling-wave protection lightning stroke preventing and handling method and device |
| CN104537186A (en) * | 2015-01-09 | 2015-04-22 | 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 |
| CN104537186B (en) * | 2015-01-09 | 2017-07-18 | 南方电网科学研究院有限责任公司 | A kind of method for simulating extra high voltage direct current transmission line thunderbolt transient process |
| CN106526418A (en) * | 2016-11-04 | 2017-03-22 | 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 | Closed-loop control system of converter valve trigger circuit of conventional high-voltage direct-current power transmission system, and control method and fault positioning method thereof |
| 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 |
| CN109193648A (en) * | 2018-10-23 | 2019-01-11 | 中国南方电网有限责任公司超高压输电公司百色局 | Super UHV transmission line series compensation device MOV whole group method for group matching |
| 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 |
| CN112287572A (en) * | 2019-07-09 | 2021-01-29 | 中国航发商用航空发动机有限责任公司 | Complex system and method and device for optimizing and verifying lightning stroke direct effect protection of complex system |
| 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 |
| CN111651952A (en) * | 2020-03-16 | 2020-09-11 | 西安交通大学 | Calculation method for lightning current characteristics of pole-holding communication system |
| 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 |
| CN113919183A (en) * | 2021-12-13 | 2022-01-11 | 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 |
| 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 |
| CN115575772A (en) * | 2022-11-21 | 2023-01-06 | 昆明理工大学 | Transient zero modulus identification method for lightning shielding failure and counterattack of power transmission line |
| 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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