CN102129009A - Method for measuring positive sequence parameters of ultra-high voltage transmission line based on double end measuring information - Google Patents
Method for measuring positive sequence parameters of ultra-high voltage transmission line based on double end measuring information Download PDFInfo
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Abstract
The invention relates to the technical field of measuring parameters of a transmission line of a power system, in particular to a method for measuring positive sequence parameters of an ultra-high voltage transmission line based on double end measuring information. The method comprises: measuring positive sequence impedance and positive sequence capacitance of the transmission line; when measuring the positive sequence impedance of the transmission line, cutting off the to-be-measured transmission line, performing three-phase short connection to the tail end of the transmission line, adding a three-phase voltage on the front end of the transmission line; when measuring the positive sequence capacitance of the transmission line, cutting off the to-be-measured transmission line, performing three-phase opening to the tail end of the transmission line, adding the three-phase voltage on the front end of the transmission line; using a global satellite positioning system technology to simultaneously measure the three-phase voltage on two ends of the transmission line and the three-phase current on two ends of the transmission line, and synchronously sampling the three-phase voltage and three-phase current. The method in the invention solves the influence of the distributed capacitance on the transmission line to the positive sequence parameters measurement so as to greatly increase the precision of the positive sequence parameters measuring result of the transmission line.
Description
Technical field
The present invention relates to the power system transmission line parameter field of measuring technique, relate in particular to a kind of UHV transmission line measurement method for positive sequence parameter based on double-end measurement information.
Background technology
Transmission line of electricity is the carrier that electric power is carried, and is one of chief component of electric system, and electric system is played an important role.The power frequency parameter of transmission line of electricity mainly comprises mutual inductance between positive sequence impedance, positive sequence electric capacity, zero sequence impedance, zero sequence electric capacity and the many times mutual inductance circuits etc.; these parameters are used for electric system carries out trend calculating, calculation of short-circuit current, relay protection setting calculating and selects power system operation mode, and its accuracy is directly connected to the accuracy of these result of calculations.The parameter of obtaining transmission line of electricity exactly has important meaning for electric system, especially along with the continuous development of China's electric system, the continuous expansion of electrical network, improving constantly of Automation of Electric Systems degree, more and more higher to the accuracy requirement of transmission line parameter.
The calculating of line parameter circuit value is comparatively complicated, is subjected to the influence of a lot of uncertain factors simultaneously, comprises the factors such as geometric configuration, electric current, environment temperature, wind speed, soil resistivity, lightning conducter erection mode and line route of circuit.The circuit of long distance powedr transmission is sagging, the random nature of the kelvin effect of alive circuit and heating, geological condition or the like bring difficulty all can for the accurate Calculation line parameter circuit value.Usually known transmission line parameter is to measure at the circuit initial stage of building up, and these parameters can more or less change in the influence of back owing to factors such as weather, temperature, environment and geography that put into operation.Therefore, can't only rely on Theoretical Calculation to obtain the exact value of these parameters, line parameter circuit value needs periodic measurement.
Current power transmission line parameter circuit value measuring method has had deep research, and has developed corresponding measuring system device, puts into operation.Yet along with the continuous development of electric system, the increase of transmission line length, the rising of electric pressure makes the distributed capacitance of the transmission line of electricity ignored in original measuring system, must consider.
Simultaneously, UHV transmission line adopts the error of the centralized equivalence of transmission line parameter significantly to increase because electric pressure is high especially, transmission distance is long especially, at this moment must consider the influence of transmission line of electricity distributed capacitance.
Summary of the invention
Technical matters at above-mentioned existence, the purpose of this invention is to provide a kind of UHV transmission line measurement method for positive sequence parameter based on double-end measurement information, to overcome existing method big drawback of measuring error when measuring the positive order parameter of UHV (ultra-high voltage) and UHV transmission line, the transmission line of electricity positive sequence parameter measurement new method that proposes has realized the accurate measurement to the positive order parameter of transmission line of electricity.
For achieving the above object, the present invention adopts following technical scheme:
1. pressurization after transmission line of electricity to be measured being had a power failure obtains for positive sequence voltage and the forward-order current of measuring calculating usefulness;
2. utilize global satellite positioning, measure the three-phase voltage and the three-phase current of transmission line of electricity head and end simultaneously, this transmission line of electricity three-phase voltage and three-phase current are carried out synchronized sampling;
3. adopt the Fourier filtering algorithm to obtain the three-phase fundamental voltage and the three-phase fundamental current of transmission line of electricity head and end;
4. the three-phase fundamental voltage to head and end carries out positive-sequence component, negative sequence component, the zero-sequence component that the preface decomposition obtains the head and end fundamental voltage;
5. the three-phase fundamental current to head and end carries out positive-sequence component, negative sequence component, the zero-sequence component that the preface decomposition obtains the head and end fundamental current;
6. adopt following formula to calculate the positive sequence impedance that obtains this transmission line of electricity:
Wherein, r
1Be the positive sequence resistance of transmission line of electricity, unit is ohm, x
1Be the forward-sequence reactance of transmission line of electricity, unit is ohm;
Be the positive sequence fundamental voltage of transmission line of electricity head end, unit is a volt;
With
Be the positive sequence fundamental current of transmission line of electricity head and end, unit is an ampere; K
1Be the correction factor relevant, K with transmission line length L
1=1+L/50 * k
1, k
1Be corrected parameter;
7. adopt following formula to calculate the positive sequence admittance that obtains this transmission line of electricity:
g
1Lead for the positive sequence electricity of transmission line of electricity, unit is a Siemens, b
1Be the positive sequence susceptance of transmission line of electricity, unit is a Siemens;
With
Be the positive sequence fundamental voltage of transmission line of electricity head and end, unit is a volt;
The positive sequence fundamental current of transmission line of electricity head end, unit are ampere; K
2Be the correction factor relevant, K with transmission line length L
2=1+L/50 * k
2, k
2Be corrected parameter.
Described step 1. in, when measuring the positive sequence impedance of transmission line of electricity, transmission line of electricity to be measured is had a power failure, with the terminal three-phase short circuit of transmission line of electricity, add three-phase voltage at the transmission line of electricity head end;
Described step 1. in, when the positive sequence admittance of measuring transmission line of electricity, transmission line of electricity to be measured is had a power failure, with the terminal three-phase open circuit of transmission line of electricity, add three-phase voltage at the transmission line of electricity head end.
Described step utilizes in 2. the time service function of GPS to obtain the time reference of error less than 1 microsecond, at gps time synchronously down, after the transmission line of electricity head end added three-phase voltage, measuring system was gathered the three-phase voltage of transmission line of electricity first and last end and the three-phase current of transmission line of electricity first and last end simultaneously.
Described step 6. in, if adopt the alien frequencies power supply to measure, then the reactance x1 that measures is revised, the reactance when obtaining power frequency, adopt following formula to revise:
Wherein, middle f
Alien frequenciesBe the frequency of alien frequencies power supply, x
1 power frequencyForward-sequence reactance during for power frequency.
Described step 7. in, transmission line of electricity positive sequence electricity is led g
1Very little, ignore, then positive sequence electric capacity c
1Computing formula be:
Wherein, middle f is the frequency of power frequency supply, and the imaginary part component of phasor is got in Im () expression.
If adopt the alien frequencies power supply to measure, then to by
The electric capacity c that formula measures
1Revise, obtain the positive sequence capacitance parameter under the power frequency, adopt following correction formula:
Wherein, f
Alien frequenciesBe the frequency of alien frequencies power supply, c
1 power frequencyPositive sequence electric capacity during for power frequency.
Described step 6. in, corrected parameter k
1As follows with the value relation of transmission line length L, wherein the unit of L is a kilometer:
As 0＜L≤100, k
1=0.000; As 100＜L≤200,0.000＜k
1≤ 0.001; As 200＜L≤400,0.001＜k
1≤ 0.002; As 400＜L≤600,0.002＜k
1≤ 0.003; As 600＜L≤800,0.003＜k
1≤ 0.004; As 800＜L≤900,0.004＜k
1≤ 0.005; As 900＜L≤1000,0.005＜k
1≤ 0.006; As 1000＜L≤1100,0.006＜k
1≤ 0.007; As 1100＜L≤1200,0.007＜k
1≤ 0.0075; As 1200＜L≤1300,0.0075＜k
1≤ 0.0085; As 1300＜L≤1400,0.0085＜k
1≤ 0.0095; As 1400＜L≤1500,0.0095＜k
1≤ 0.0105; As 1500＜L≤1600,0.0105＜k
1≤ 0.0115.
Described step 7. in, corrected parameter k
2With as follows with the value relation of transmission line length L, wherein the unit of L is a kilometer:
As 0＜L≤50, k
2=0.0000; As 50＜L≤100,0.0000＜k
2≤ 0.0003; As 100＜L≤150,0.0003＜k
2≤ 0.0005; As 150＜L≤200,0.0005＜k
2≤ 0.0008; As 200＜L≤250,0.0008＜k
2≤ 0.0011; As 250＜L≤300,0.0011＜k
2≤ 0.0014; As 300＜L≤350,0.0014＜k
2≤ 0.0017; As 350＜L≤400,0.0017＜k
2≤ 0.0020; As 400＜L≤450,0.0020＜k
2≤ 0.0023; As 450＜L≤500,0.0023＜k
2≤ 0.0026; As 500＜L≤550,0.0026＜k
2≤ 0.0029; As 550＜L≤600,0.0029＜k
2≤ 0.0032; As 600＜L≤650,0.0032＜k
2≤ 0.0035; As 650＜L≤700,0.0035＜k
2≤ 0.0038; As 700＜L≤750,0.0038＜k
2≤ 0.0041; As 750＜L≤800,0.0041＜k
2≤ 0.0044; As 800＜L≤850,0.0044＜k
2≤ 0.0048; As 850＜L≤900,0.0048＜k
2≤ 0.0051; As 900＜L≤950,0.0051＜k
2≤ 0.0055; As 950＜L≤1000,0.0055＜k
2≤ 0.0059; As 1000＜L≤1050,0.0059＜k
2≤ 0.0063; As 1050＜L≤1100,0.0063＜k
2≤ 0.0067; As 1100＜L≤1150,0.0067＜k
2≤ 0.0071; As 1150＜L≤1200,0.0071＜k
2≤ 0.0075; As 1200＜L≤1250,0.0075＜k
2≤ 0.0079; As 1250＜L≤1300,0.0079＜k
2≤ 0.0083; As 1300＜L≤1350,0.0083＜k
2≤ 0.0087; As 1350＜L≤1400,0.0087＜k
2≤ 0.0092; As 1400＜L≤1450,0.0092＜k
2≤ 0.0097; As 1450＜L≤1500,0.0097＜k
2≤ 0.0102; As 1500＜L≤1550,0.0102＜k
2≤ 0.0107; As 1550＜L≤1600,0.0107＜k
2≤ 0.0112.
The present invention has the following advantages and good effect:
1) the present invention need gather the three-phase voltage and the three-phase current of transmission line of electricity head and end simultaneously, has taken into account the influence of the distributed capacitance on the transmission line of electricity, thereby is particularly suitable for the measurement of the positive order parameter of extra-high voltage long distance transmission line;
2) the present invention utilizes the GPS technology to solve the simultaneity problem of strange land signal measurement, not only is fit to the measurement of one the positive order parameter of transmission line of electricity, especially is fit to measure the positive order parameter of UHV transmission line;
3) the present invention not only is fit to adopt power frequency supply to measure, and also is fit to adopt the alien frequencies power supply to measure;
4) the present invention is by measuring the positive sequence voltage and the forward-order current at transmission line of electricity two ends, again the mean value of circuit two ends positive sequence voltage phasor mean value and forward-order current phasor is revised, solve the distributed capacitance on the transmission line of electricity and aligned the influence that order parameter is measured, thereby improved the precision of transmission line of electricity positive sequence parameter measurements greatly.
Description of drawings
Fig. 1 is that the transmission line of electricity positive sequence impedance is measured connection diagram among the present invention.
Fig. 2 is a transmission line of electricity positive sequence capacitance measurement connection diagram among the present invention.
Embodiment
The invention will be further described in conjunction with the accompanying drawings with specific embodiment below:
UHV transmission line measurement method for positive sequence parameter based on double-end measurement information provided by the invention, adopt following steps:
Step 1: tested transmission line of electricity is had a power failure.
Step 2: when measuring the positive sequence impedance of transmission line of electricity, the terminal three-phase short circuit with transmission line of electricity applies three-phase main-frequency voltage at the transmission line of electricity head end, measures wiring as shown in Figure 1.PT is a voltage transformer (VT) among the figure, and CT is a current transformer.Under the Global Positioning System (GPS) time synchronized, be arranged in the measuring system A of transmission line of electricity head and end and three-phase voltage that measuring system B measures the transmission line of electricity head end simultaneously and the three-phase current of transmission line of electricity head and end.
When measuring the positive sequence electric capacity of transmission line of electricity, the terminal three-phase open circuit with transmission line of electricity applies three-phase voltage at the transmission line of electricity head end, measures wiring as shown in Figure 2.PT is a voltage transformer (VT) among the figure, and CT is a current transformer.Under the Global Positioning System (GPS) time synchronized, be arranged in the measuring system A of transmission line of electricity head and end and three-phase voltage that measuring system B measures the transmission line of electricity head and end simultaneously and the three-phase current of transmission line of electricity head end.
Step 3: the three-phase voltage and the three-phase current of the transmission line of electricity that measuring system A and B are gathered, adopt the Fourier filtering algorithm to obtain the three-phase fundamental voltage of transmission line of electricity head and end earlier
With the three-phase fundamental current
Utilize formula (1) and (2) that head and end fundamental voltage and head and end fundamental current are carried out positive-sequence component, negative sequence component and the zero-sequence component that the preface decomposition obtains the head and end fundamental voltage again
Utilize formula (3) and (4) to obtain positive-sequence component, negative sequence component and the zero-sequence component of transmission line of electricity head and end fundamental current
(1) in formula, (2) formula, (3) formula and (4) formula, α=e
J120 °
Step 4: with the positive sequence voltage of transmission line of electricity head end
And the forward-order current of transmission line of electricity head and end
With
Substitution
(2) formula can be obtained the positive sequence impedance parameter z of transmission line of electricity
1
K
1Be the correction factor relevant, K with transmission line length L
1=1+L/50 * k
1, k
1Value shown in following table table 1.
Table 1 k
1Value
| Transmission line length L (kilometer) | k 1 |
| 0＜L≤100 | k 1＝0.000 |
| 100＜L≤200 | 0.000＜k 1≤0.001 |
| 200＜L≤400 | 0.001＜k 1≤0.002 |
| 400＜L≤600 | 0.002＜k 1≤0.003 |
| 600＜L≤800 | 0.003＜k 1≤0.004 |
| 800＜L≤900 | 0.004＜k 1≤0.005 |
| 900＜L≤1000 | 0.005＜k 1≤0.006 |
| 1000＜L≤1100 | 0.006＜k 1≤0.007 |
| 1100＜L≤1200 | 0.007＜k 1≤0.0075 |
| 1200＜L≤1300 | 0.0075＜k 1≤0.0085 |
| 1300＜L≤1400 | 0.0085＜k 1≤0.0095 |
| 1400＜L≤1500 | 0.0095＜k 1≤0.0105 |
| 1500＜L≤1600 | 0.0105＜k 1≤0.0115 |
If adopt the alien frequencies power supply to measure, then need the reactance x that measures by (5) formula
1Revise, obtain the forward-sequence reactance under the power frequency.Correction formula is:
Positive sequence voltage with the transmission line of electricity head and end
With
And the forward-order current of transmission line of electricity head end
Substitution (7) formula can be obtained the positive sequence admittance parameter g of transmission line of electricity
1+ jb
1
K
2Be the correction factor relevant, K with transmission line length L
2=1+L/50 * k
2, k
2Value shown in following table table 2:
Table 2 k
2Value
| Transmission line length L (kilometer) | k 2 |
| 0＜L≤50 | k 2＝0.0000 |
| 50＜L≤100 | 0.0000＜k 2≤0.0003 |
| 100＜L≤150 | 0.0003＜k 2≤0.0005 |
| 150＜L≤200 | 0.0005＜k 2≤0.0008 |
| 200＜L≤250 | 0.0008＜k 2≤0.0011 |
| 250＜L≤300 | 0.0011＜k 2≤0.0014 |
| 300＜L≤350 | 0.0014＜k 2≤0.0017 |
| 350＜L≤400 | 0.0017＜k 2≤0.0020 |
| 400＜L≤450 | 0.0020＜k 2≤0.0023 |
| 450＜L≤500 | 0.0023＜k 2≤0.0026 |
| 500＜L≤550 | 0.0026＜k 2≤0.0029 |
| 550＜L≤600 | 0.0029＜k 2≤0.0032 |
| 600＜L≤650 | 0.0032＜k 2≤0.0035 |
| 650＜L≤700 | 0.0035＜k 2≤0.0038 |
| 700＜L≤750 | 0.0038＜k 2≤0.0041 |
| 750＜L≤800 | 0.0041＜k 2≤0.0044 |
| 800＜L≤850 | 0.0044＜k 2≤0.0048 |
| 850＜L≤900 | 0.0048＜k 2≤0.0051 |
| 900＜L≤950 | 0.0051＜k 2≤0.0055 |
| 950＜L≤1000 | 0.0055＜k 2≤0.0059 |
| 1000＜L≤1050 | 0.0059＜k 2≤0.0063 |
| 1050＜L≤1100 | 0.0063＜k 2≤0.0067 |
| 1100＜L≤1150 | 0.0067＜k 2≤0.0071 |
| 1150＜L≤1200 | 0.0071＜k 2≤0.0075 |
| 1200＜L≤1250 | 0.0075＜k 2≤0.0079 |
| 1250＜L≤1300 | 0.0079＜k 2≤0.0083 |
| 1300＜L≤1350 | 0.0083＜k 2≤0.0087 |
| 1350＜L≤1400 | 0.0087＜k 2≤0.0092 |
| 1400＜L≤1450 | 0.0092＜k 2≤0.0097 |
| 1450＜L≤1500 | 0.0097＜k 2≤0.0102 |
| 1500＜L≤1550 | 0.0102＜k 2≤0.0107 |
| 1550＜L≤1600 | 0.0107＜k 2≤0.0112 |
Usually, transmission line of electricity positive sequence electricity is led g
1Very little, can ignore, then positive sequence electric capacity c
1Computing formula be:
(8) f is a work frequency in the formula, and the imaginary part component of phasor is got in Im () expression.
If adopt the alien frequencies power supply to measure, then the frequency f in (8) formula is the alien frequencies frequency, need be to the electric capacity c that is measured by (8) formula
1Revise, obtain the positive sequence electric capacity under the power frequency.Correction formula is:
(9) f in the formula
Alien frequenciesBe the frequency of alien frequencies power supply, c
1 power frequencyPositive sequence electric capacity during for power frequency.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique; under the situation that does not break away from the spirit and scope of the present invention; can also make various conversion or modification, so all technical schemes that are equal to, all fall into protection scope of the present invention.
Claims (8)
1. the UHV transmission line measurement method for positive sequence parameter based on double-end measurement information is characterized in that, may further comprise the steps:
1. pressurization after transmission line of electricity to be measured being had a power failure obtains for positive sequence voltage and the forward-order current of measuring calculating usefulness;
2. utilize global satellite positioning, measure the three-phase voltage and the three-phase current of transmission line of electricity head and end simultaneously, this transmission line of electricity three-phase voltage and three-phase current are carried out synchronized sampling;
3. adopt the Fourier filtering algorithm to obtain the three-phase fundamental voltage and the three-phase fundamental current of transmission line of electricity head and end;
4. the three-phase fundamental voltage to head and end carries out positive-sequence component, negative sequence component, the zero-sequence component that the preface decomposition obtains the head and end fundamental voltage;
5. the three-phase fundamental current to head and end carries out positive-sequence component, negative sequence component, the zero-sequence component that the preface decomposition obtains the head and end fundamental current;
6. adopt following formula to calculate the positive sequence impedance that obtains this transmission line of electricity:
Wherein, r
1Be the positive sequence resistance of transmission line of electricity, unit is ohm, x
1Be the forward-sequence reactance of transmission line of electricity, unit is ohm;
Be the positive sequence fundamental voltage of transmission line of electricity head end, unit is a volt;
With
Be the positive sequence fundamental current of transmission line of electricity head and end, unit is an ampere; K
1Be the correction factor relevant, K with transmission line length L
1=1+L/50 * k
1, k
1Be corrected parameter;
7. adopt following formula to calculate the positive sequence admittance that obtains this transmission line of electricity:
g
1Lead for the positive sequence electricity of transmission line of electricity, unit is a Siemens, b
1Be the positive sequence susceptance of transmission line of electricity, unit is a Siemens;
With
Be the positive sequence fundamental voltage of transmission line of electricity head and end, unit is a volt;
The positive sequence fundamental current of transmission line of electricity head end, unit are ampere; K
2Be the correction factor relevant, K with transmission line length L
2=1+L/50 * k
2, k
2Be corrected parameter.
2. the UHV transmission line measurement method for positive sequence parameter based on double-end measurement information according to claim 1 is characterized in that:
Described step 1. in, when measuring the positive sequence impedance of transmission line of electricity, transmission line of electricity to be measured is had a power failure, with the terminal three-phase short circuit of transmission line of electricity, add three-phase voltage at the transmission line of electricity head end;
Described step 1. in, when the positive sequence admittance of measuring transmission line of electricity, transmission line of electricity to be measured is had a power failure, with the terminal three-phase open circuit of transmission line of electricity, add three-phase voltage at the transmission line of electricity head end.
3. the UHV transmission line measurement method for positive sequence parameter based on double-end measurement information according to claim 1 is characterized in that:
Described step utilizes in 2. the time service function of GPS to obtain the time reference of error less than 1 microsecond, at gps time synchronously down, after the transmission line of electricity head end added three-phase voltage, measuring system was gathered the three-phase voltage of transmission line of electricity first and last end and the three-phase current of transmission line of electricity first and last end simultaneously.
4. according to each described UHV transmission line measurement method for positive sequence parameter among the claim 1-3, it is characterized in that based on double-end measurement information:
Described step 6. in, if adopt the alien frequencies power supply to measure, reactance x then to measuring
1Revise, the reactance when obtaining power frequency, adopt following formula to revise:
Wherein, middle f
Alien frequenciesBe the frequency of alien frequencies power supply, x
1 power frequencyForward-sequence reactance during for power frequency.
5. according to each described UHV transmission line measurement method for positive sequence parameter among the claim 1-3, it is characterized in that based on double-end measurement information:
Described step 7. in, transmission line of electricity positive sequence electricity is led g
1Very little, ignore, then positive sequence electric capacity c
1Computing formula be:
Wherein, middle f is the frequency of power frequency supply, and the imaginary part component of phasor is got in Im () expression.
6. the UHV transmission line measurement method for positive sequence parameter based on double-end measurement information according to claim 5 is characterized in that:
If adopt the alien frequencies power supply to measure, then to by
The electric capacity c that formula measures
1Revise, obtain the positive sequence capacitance parameter under the power frequency, adopt following correction formula:
Wherein, f
Alien frequenciesBe the frequency of alien frequencies power supply, c
1 power frequencyPositive sequence electric capacity during for power frequency.
7. the UHV transmission line measurement method for positive sequence parameter based on double-end measurement information according to claim 1 is characterized in that:
Described step 6. in, corrected parameter k
1As follows with the value relation of transmission line length L, wherein the unit of L is a kilometer:
As 0＜L≤100, k
1=0.000; As 100＜L≤200,0.000＜k
1≤ 0.001; As 200＜L≤400,0.001＜k
1≤ 0.002; As 400＜L≤600,0.002＜k
1≤ 0.003; As 600＜L≤800,0.003＜k
1≤ 0.004; As 800＜L≤900,0.004＜k
1≤ 0.005; As 900＜L≤1000,0.005＜k
1≤ 0.006; As 1000＜L≤1100,0.006＜k
1≤ 0.007; As 1100＜L≤1200,0.007＜k
1≤ 0.0075; As 1200＜L≤1300,0.0075＜k
1≤ 0.0085; As 1300＜L≤1400,0.0085＜k
1≤ 0.0095; As 1400＜L≤1500,0.0095＜k
1≤ 0.0105; As 1500＜L≤1600,0.0105＜k
1≤ 0.0115.
8. according to claim 1 or 7 described UHV transmission line measurement method for positive sequence parameter, it is characterized in that based on double-end measurement information:
Described step 7. in, corrected parameter k
2With as follows with the value relation of transmission line length L, wherein the unit of L is a kilometer:
As 0＜L≤50, k
2=0.0000; As 50＜L≤100,0.0000＜k
2≤ 0.0003; As 100＜L≤150,0.0003＜k
2≤ 0.0005; As 150＜L≤200,0.0005＜k
2≤ 0.0008; As 200＜L≤250,0.0008＜k
2≤ 0.0011; As 250＜L≤300,0.0011＜k
2≤ 0.0014; As 300＜L≤350,0.0014＜k
2≤ 0.0017; As 350＜L≤400,0.0017＜k
2≤ 0.0020; As 400＜L≤450,0.0020＜k
2≤ 0.0023; As 450＜L≤500,0.0023＜k
2≤ 0.0026; As 500＜L≤550,0.0026＜k
2≤ 0.0029; As 550＜L≤600,0.0029＜k
2≤ 0.0032; As 600＜L≤650,0.0032＜k
2≤ 0.0035; As 650＜L≤700,0.0035＜k
2≤ 0.0038; As 700＜L≤750,0.0038＜k
2≤ 0.0041; As 750＜L≤800,0.0041＜k
2≤ 0.0044; As 800＜L≤850,0.0044＜k
2≤ 0.0048; As 850＜L≤900,0.0048＜k
2≤ 0.0051; As 900＜L≤950,0.0051＜k
2≤ 0.0055; As 950＜L≤1000,0.0055＜k
2≤ 0.0059; As 1000＜L≤1050,0.0059＜k
2≤ 0.0063; As 1050＜L≤1100,0.0063＜k
2≤ 0.0067; As 1100＜L≤1150,0.0067＜k
2≤ 0.0071; As 1150＜L≤1200,0.0071＜k
2≤ 0.0075; As 1200＜L≤1250,0.0075＜k
2≤ 0.0079; As 1250＜L≤1300,0.0079＜k
2≤ 0.0083; As 1300＜L≤1350,0.0083＜k
2≤ 0.0087; As 1350＜L≤1400,0.0087＜k
2≤ 0.0092; As 1400＜L≤1450,0.0092＜k
2≤ 0.0097; As 1450＜L≤1500,0.0097＜k
2≤ 0.0102; As 1500＜L≤1550,0.0102＜k
2≤ 0.0107; As 1550＜L≤1600,0.0107＜k
2≤ 0.0112.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003734 CN102129009B (en) | 2011-01-10 | 2011-01-10 | Method for measuring positive sequence parameters of ultra-high voltage transmission line based on double end measuring information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110003734 CN102129009B (en) | 2011-01-10 | 2011-01-10 | Method for measuring positive sequence parameters of ultra-high voltage transmission line based on double end measuring information |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323484A (en) * | 2011-08-15 | 2012-01-18 | 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 | Accurate measurement and calculation method for parameters of power transmission line |
| CN102435851A (en) * | 2011-09-20 | 2012-05-02 | 武汉大学 | Method for measuring zero-sequence parameters of double-circuit transmission lines |
| CN102979512A (en) * | 2012-11-28 | 2013-03-20 | 中国石油大学(北京) | Black box analyzing method and device for acquiring transmission characteristic of logging cable |
| CN103217585A (en) * | 2013-03-18 | 2013-07-24 | 山东电力集团公司德州供电公司 | T-type electric transmission line positive sequence capacitance measuring method |
| CN103399209A (en) * | 2013-08-22 | 2013-11-20 | 武汉大学 | Method for measuring power frequency parameters of ultra-high voltage bipolar direct current (DC) transmission line |
| CN103424628A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Method for measuring parallel grid line positive sequence impedance |
| CN103605003A (en) * | 2013-11-20 | 2014-02-26 | 武汉大学 | High precision method for measuring zero sequence capacitance of super/extra high voltage same-tower quadruple power transmission lines |
| CN103675565A (en) * | 2014-01-09 | 2014-03-26 | 武汉大学 | Method for measuring power frequency parameters of superhigh/extrahigh-voltage alternating-current (direct-current) power transmission circuit |
| CN103713196A (en) * | 2014-01-08 | 2014-04-09 | 国家电网公司 | Method for measuring phase self-admittance and phase self-impedance parameters of alternating-current extra-high voltage same-tower double-circuit lines |
| CN104155543A (en) * | 2014-07-17 | 2014-11-19 | 国家电网公司 | Transmission line parameter identification method based on power loss method |
| CN104865452A (en) * | 2015-06-15 | 2015-08-26 | 武汉大学 | Harmonic-component-based anti-interference capacitance measurement method for untransposed transmission line |
| CN105223449A (en) * | 2015-10-28 | 2016-01-06 | 中国南方电网有限责任公司电网技术研究中心 | Asymmetric power transmission line parameter online measurement method |
| CN105675953A (en) * | 2015-12-15 | 2016-06-15 | 国网山西省电力公司电力科学研究院 | Quasi-synchronization measuring method based on zero-crossing detection for power transmission line both-end voltage instantaneous voltage |
| CN106324347A (en) * | 2015-06-16 | 2017-01-11 | 云南电网有限责任公司玉溪供电局 | T-type connection transmission line power frequency positive-sequence impedance measurement method |
| CN107328996A (en) * | 2017-06-12 | 2017-11-07 | 华北电力大学 | Robust electric transmission line positive sequence parameter identification method |
| CN109241626A (en) * | 2018-09-07 | 2019-01-18 | 福建水利电力职业技术学院 | A kind of calculation method of power transmission line power frequency order parameter |
| CN110174588A (en) * | 2018-02-21 | 2019-08-27 | 通用电器技术有限公司 | The estimation of electrical network parameter |
| CN110764019A (en) * | 2019-10-30 | 2020-02-07 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judgment and high-precision positioning method based on double-end measurement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148087A (en) * | 1977-04-20 | 1979-04-03 | Phadke Arun G | Distance relay for electric power transmission lines |
| US5367426A (en) * | 1992-10-14 | 1994-11-22 | Schweitzer Engineering Laboratories, Inc. | Distance relay with load encroachment protection, for use with power transmission lines |
| US20040032265A1 (en) * | 2002-06-14 | 2004-02-19 | Progress Energy Service Company | Double-ended distance-to-fault location system using time-synchronized positive-or negative-sequence quantities |
| CN101359007A (en) * | 2008-09-26 | 2009-02-04 | 河北省电力研究院 | Measurement method for positive sequence parameter of high-voltage transmission line |
| CN101419253A (en) * | 2008-12-17 | 2009-04-29 | 河南电力试验研究院 | Uhv transmission line positive sequence and zero sequence parameter measurement method and system |
-
2011
- 2011-01-10 CN CN 201110003734 patent/CN102129009B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148087A (en) * | 1977-04-20 | 1979-04-03 | Phadke Arun G | Distance relay for electric power transmission lines |
| US5367426A (en) * | 1992-10-14 | 1994-11-22 | Schweitzer Engineering Laboratories, Inc. | Distance relay with load encroachment protection, for use with power transmission lines |
| US20040032265A1 (en) * | 2002-06-14 | 2004-02-19 | Progress Energy Service Company | Double-ended distance-to-fault location system using time-synchronized positive-or negative-sequence quantities |
| CN101359007A (en) * | 2008-09-26 | 2009-02-04 | 河北省电力研究院 | Measurement method for positive sequence parameter of high-voltage transmission line |
| CN101419253A (en) * | 2008-12-17 | 2009-04-29 | 河南电力试验研究院 | Uhv transmission line positive sequence and zero sequence parameter measurement method and system |
Non-Patent Citations (8)
| Title |
|---|
| 《中国高等学校电力系统及其自动化专业第二十四届学术年会》 20081231 姜峥,梁志瑞，牛胜锁，李炜 基于同步相量的双回输电线路零序参数测量研究 第2419-2421页 1-8 , * |
| 《电力安全技术》 20020731 李涛，张承学，胡志坚 输电线路故障定位中同步时钟的应用 第25-26,33页 1-8 第4卷, 第7期 * |
| 《电力科学与技术学报》 20100930 胡志坚，程小敏 输电线路零序阻抗参数测量方法 第25-31页 1-8 第25卷, 第3期 * |
| 《电网技术》 20080930 薛士敏，贺家李，李永丽 特高压输电线路分布电容对负序方向纵联保护的影响 第94－97页 1-8 第32卷, 第17期 * |
| 姜峥,梁志瑞，牛胜锁，李炜: "基于同步相量的双回输电线路零序参数测量研究", 《中国高等学校电力系统及其自动化专业第二十四届学术年会》 * |
| 李涛，张承学，胡志坚: "输电线路故障定位中同步时钟的应用", 《电力安全技术》 * |
| 胡志坚，程小敏: "输电线路零序阻抗参数测量方法", 《电力科学与技术学报》 * |
| 薛士敏，贺家李，李永丽: "特高压输电线路分布电容对负序方向纵联保护的影响", 《电网技术》 * |
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| CN102323484A (en) * | 2011-08-15 | 2012-01-18 | 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 | Accurate measurement and calculation method for parameters of power transmission line |
| CN102435851A (en) * | 2011-09-20 | 2012-05-02 | 武汉大学 | Method for measuring zero-sequence parameters of double-circuit transmission lines |
| CN102435851B (en) * | 2011-09-20 | 2013-08-14 | 武汉大学 | Method for measuring zero-sequence parameters of double-circuit transmission lines |
| CN102979512B (en) * | 2012-11-28 | 2015-05-20 | 中国石油大学(北京) | Black box analyzing method and device for acquiring transmission characteristic of logging cable |
| CN102979512A (en) * | 2012-11-28 | 2013-03-20 | 中国石油大学(北京) | Black box analyzing method and device for acquiring transmission characteristic of logging cable |
| CN103217585A (en) * | 2013-03-18 | 2013-07-24 | 山东电力集团公司德州供电公司 | T-type electric transmission line positive sequence capacitance measuring method |
| CN103424628A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Method for measuring parallel grid line positive sequence impedance |
| CN103399209A (en) * | 2013-08-22 | 2013-11-20 | 武汉大学 | Method for measuring power frequency parameters of ultra-high voltage bipolar direct current (DC) transmission line |
| CN103399209B (en) * | 2013-08-22 | 2016-03-30 | 武汉大学 | A kind of extra-high voltage bipolar direct current transmission line power frequency parameters measuring method |
| CN103605003A (en) * | 2013-11-20 | 2014-02-26 | 武汉大学 | High precision method for measuring zero sequence capacitance of super/extra high voltage same-tower quadruple power transmission lines |
| CN103605003B (en) * | 2013-11-20 | 2016-05-25 | 武汉大学 | Ultra-high/extra-high voltage transmission line with four-circuit on single tower zero sequence electric capacity high-precision measuring method |
| CN103713196A (en) * | 2014-01-08 | 2014-04-09 | 国家电网公司 | Method for measuring phase self-admittance and phase self-impedance parameters of alternating-current extra-high voltage same-tower double-circuit lines |
| CN103713196B (en) * | 2014-01-08 | 2016-08-24 | 国家电网公司 | A kind of AC extra high voltage multiple-circuit on same tower phase self-admittance, phase self-impedance measurement method of parameters |
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| CN104865452B (en) * | 2015-06-15 | 2017-11-28 | 武汉大学 | Not transposed transmission line electric capacity anti-jamming measurement methods based on harmonic component |
| CN104865452A (en) * | 2015-06-15 | 2015-08-26 | 武汉大学 | Harmonic-component-based anti-interference capacitance measurement method for untransposed transmission line |
| CN106324347A (en) * | 2015-06-16 | 2017-01-11 | 云南电网有限责任公司玉溪供电局 | T-type connection transmission line power frequency positive-sequence impedance measurement method |
| CN106324347B (en) * | 2015-06-16 | 2019-01-25 | 云南电网有限责任公司玉溪供电局 | T-type wiring transmission line power frequency positive sequence impedance measurement method |
| CN105223449A (en) * | 2015-10-28 | 2016-01-06 | 中国南方电网有限责任公司电网技术研究中心 | Asymmetric power transmission line parameter online measurement method |
| CN105675953A (en) * | 2015-12-15 | 2016-06-15 | 国网山西省电力公司电力科学研究院 | Quasi-synchronization measuring method based on zero-crossing detection for power transmission line both-end voltage instantaneous voltage |
| CN107328996A (en) * | 2017-06-12 | 2017-11-07 | 华北电力大学 | Robust electric transmission line positive sequence parameter identification method |
| CN107328996B (en) * | 2017-06-12 | 2019-10-15 | 华北电力大学 | Robust electric transmission line positive sequence parameter identification method |
| CN110174588A (en) * | 2018-02-21 | 2019-08-27 | 通用电器技术有限公司 | The estimation of electrical network parameter |
| CN109241626A (en) * | 2018-09-07 | 2019-01-18 | 福建水利电力职业技术学院 | A kind of calculation method of power transmission line power frequency order parameter |
| CN109241626B (en) * | 2018-09-07 | 2022-05-17 | 福建水利电力职业技术学院 | Method for calculating power transmission line power frequency sequence parameters |
| CN110764019A (en) * | 2019-10-30 | 2020-02-07 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judgment and high-precision positioning method based on double-end measurement |
| CN110764019B (en) * | 2019-10-30 | 2021-07-30 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judging and positioning method based on double-end measurement |
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