WO2003069754A1 - Appareil de relais protecteur comprenant un detecteur de courant photoelectrique - Google Patents

Appareil de relais protecteur comprenant un detecteur de courant photoelectrique Download PDF

Info

Publication number
WO2003069754A1
WO2003069754A1 PCT/JP2003/001662 JP0301662W WO03069754A1 WO 2003069754 A1 WO2003069754 A1 WO 2003069754A1 JP 0301662 W JP0301662 W JP 0301662W WO 03069754 A1 WO03069754 A1 WO 03069754A1
Authority
WO
WIPO (PCT)
Prior art keywords
output
current
optical signal
protection section
photocurrent sensor
Prior art date
Application number
PCT/JP2003/001662
Other languages
English (en)
Japanese (ja)
Inventor
Takafumi Ito
Yoshifumi Chida
Matsuyoshi Kato
Yasuhisa Yamada
Yoichiro Tashiro
Kiyoshi Kurosawa
Kenji Ohkawara
Original Assignee
Takaoka Electric Mfg. Co., Ltd.
Tokyo Electric Power Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takaoka Electric Mfg. Co., Ltd., Tokyo Electric Power Company filed Critical Takaoka Electric Mfg. Co., Ltd.
Priority to JP2003568757A priority Critical patent/JP3802028B2/ja
Priority to AU2003211341A priority patent/AU2003211341A1/en
Publication of WO2003069754A1 publication Critical patent/WO2003069754A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H02H1/0069—Details of emergency protective circuit arrangements concerning transmission of signals by means of light or heat rays

Definitions

  • the present invention relates to a protective relay for measuring and monitoring a current flowing in a conductor of a power facility by utilizing the Faraday effect.
  • a current signal of a device conductor detected by a current transformer is transmitted to the protective relay, and the protective relay performs calculation and determination for failure determination.
  • a protective relay device using a photocurrent sensor with a differential operation function has been proposed instead of the current measurement method using a conventional wound-type current transformer.
  • the application has been filed in the form of “Open 200 0—5 9 9 8 7” and Japanese Patent Application No. 1 1—2 2 4 8 2 1.
  • a protection relay device using a conventional photocurrent sensor includes a first photocurrent sensor 1 including a polarizer 14, a Faraday element 11, and an analyzer 15, and a first photocurrent sensor.
  • Second photocurrent sensor 2 configured in the same way as sensor 1, optical fiber transmission lines 3a, 3b, 3c, light source 12, photoelectric converter 16, high-pass filter circuit 17, low-pass filter It comprises an optical signal processing section 4 a composed of a circuit 18 and a divider 19, a power frequency component difference current detecting means 5 d, and a judging means 8.
  • the first photocurrent sensor 1 and the second photocurrent sensor 2 are provided at both ends of the protection section 9 of the power system.
  • the current first photocurrent sensor 1 detects the i physician second optical current sensor 2 a current detected a i 2, the code together inflow direction to the protected section 9 of the electric power system +
  • the outflow direction is one.
  • the direction of propagation of light in the first photocurrent sensor 1 is provided so as to coincide with the direction of the magnetic field generated by the current i detected by the first photocurrent sensor 1, and the second photocurrent
  • the light propagation direction in the sensor 2 is provided so as to match the magnetic field generated by the current i 2 detected by the second photocurrent sensor 2.
  • the relationship between the current i detected by the first photocurrent sensor 1 and the rotation angle ⁇ of the polarization plane is when the Verde constant is V.
  • the incident light is further converted into light in which the rotation angle 0 of the polarization plane is modulated by the analyzer 15 in the first photocurrent sensor 1.
  • the analyzer 15 is preferably installed at an angle of plus 45 ° or minus 45 ° with respect to the polarizer 14, and the emitted light of the first photocurrent sensor 1 is x, y by the analyzer 15
  • the light is divided into two components, Plx and Ply , in the direction.
  • the outgoing light P lx of the first photocurrent sensor 1 is represented by the following equation.
  • the output light Plx of the first photocurrent sensor 1 is guided to the optical fiber transmission line 3b and reaches the second photocurrent sensor 2.
  • Outgoing light P lx, the second receiving the Faraday effect due to the magnetic field optical current sensor 2 is generated by the current i 2 I 28 ⁇ t) for detecting a current i 2 of the plane of polarization in proportion to the magnitude angle 0 2 Just rotate.
  • the light emitted from the second photocurrent sensor 2 is again divided by the analyzer 15 into two component lights P 2x and P 2y in the x and y directions, and are expressed by the following equation.
  • the light P 2x emitted from the second photocurrent sensor 2 is guided to the optical fiber transmission line 3 c and enters the photoelectric converter 16, where it is converted into an electric signal.
  • the DC component and the AC component are separated by 18, and the AC component is divided by the DC component in the divider 19 to obtain a difference current output S 2x by the photocurrent sensor.
  • the method of dividing by the DC component by the divider 19 is used in order to compensate for the loss of light quantity when the optical signal is transmitted.
  • the difference current output S 2x by the photocurrent sensor is represented by the following equation.
  • Equation (9) holds in a small current region where Equation (7) holds, and does not hold in a high current region.
  • the present inventors the Japanese Patent Application No. flat 11-224821 as a protective relay device using an optical fiber sensor capable of measuring the difference current i E + i 2 to the protected section 9 of the electric power system even in a large current region Filed.
  • J k (a) is the k-th Bessel function
  • equation (10) becomes
  • B 2 2A 1 A 2 / (1 + 2A 1 A 2 ) ⁇ ⁇ ⁇ -(13 c) where BB 2 is a constant with respect to time.
  • the difference current output S 2x by the photocurrent sensor is the frequency component of the difference current i + i 2 to the protection section 9 of the power system shown in the first term, that is, the power supply frequency In addition to the component, it consists of the term of the frequency component twice the power frequency shown in the second term.
  • the term of the power frequency component of Eq. (13b) by calculation.
  • the current flowing into protection section 9 is assumed to be 33 kA or less.
  • Verdet constant V 3. 93X 10- 6 [rad / A] of the lead glass fiber-type optical current sensors of wavelength 155 onm. Using these values, 'An approximation of In holds.
  • equation (13b) can be expressed as equation (13d).
  • the approximation error is 1% or less at an effective current of 24 kA and 2% or less at an effective value of 33 kA or less, and a lead glass fiber type photocurrent sensor with a wavelength of 155 Onm is obtained. Considering the possibility that the used protective relay can be applied to the failure judgment calculation available.
  • equation (13a) shows that at a current of 33 kA or less, at the same frequency component as the power supply frequency of the differential current output S 2 x by the photocurrent sensor, the differential current i Although an output proportional to E + i 2, which means that twice the frequency components of the power supply frequency is generated as an error component.
  • the power supply frequency component difference current detection means 5 removes twice the frequency component from the difference current output S 2 x by the photocurrent sensor, and the output is led to the judgment means 8 to protect the power system. operate on the differential current i E + i 2 to the protective relay device is formed.
  • the current signal is a sine wave AC signal.
  • the current signal becomes a signal that is superimposed on the DC component and transiently attenuated.
  • the largest DC component is superimposed, that is, the fault current with 100% DC component superimposed is expressed by the following equation.
  • ⁇ is an attenuation time constant determined from the ratio of the reactance and the resistance of the power system. Even if the transiently attenuated current signal represented by equation (14) is substituted into equations (5a) and (6), it is divided into power supply frequency components as shown in equation (13a). It cannot be represented. Therefore, the effect of the error component included in the difference current output S 2 x of the photocurrent sensor on the protection case 9 of the power system for the accident cases outside the protection zone and the accident within the protection zone think.
  • FIG. 2 is a system diagram for explaining the operation of the protective relay using the photocurrent sensor.
  • fl and f3 are accidents outside the protection section
  • f2 are accidents in the protection section.
  • an accident outside the section of protection section 9 of the power system is referred to as an external accident
  • an accident within the section of protection section 9 of the power system is referred to as an internal accident.
  • the first photocurrent sensor 1 and the second photocurrent sensor 2 are respectively installed at both ends of the protection section 9 of the power system, and the light source is provided by the optical fiber transmission lines 3a to 3d. 12, connected to the first optical signal processing unit 4a and the second optical signal processing unit 4b.
  • the first photocurrent sensor 1 detects the current ii
  • the second photocurrent Sensor 2 for detecting the current i 2.
  • Fig. 7 is a diagram for explaining that if an external fault occurs and the fault current is a DC component superimposed, unnecessary operation of the protective relay may occur with the conventional technology.
  • the values of the fault current and the optical fiber constants shown below were substituted into equations (14), (5a) and (6), and the signal values at each section were calculated.
  • Fig. 7 (a) shows the fault current signal in which the DC component expressed by equation (14) is superimposed in the case of an external fault
  • Fig. 7 (b) shows the second photocurrent sensor at this time.
  • FIG. 7 (c) a differential current output S 2 x by the optical current sensor
  • Fig. 7 (d) the effective value R 2x power frequency component of the differential current output S 2x by the optical current sensor obtained, respectively it Things.
  • the optical current sensor 1, 2 is a lead-glass Sufaiba type fiber-optic current sensor having a wavelength of 1550 nm
  • the Verdet constant V is used 3. 93X 10- 6 [r ad / A].
  • the magnitude of the fault current I is 33 kA rms, the power supply frequency is 5 OHz, and the time constant is 50 ms.
  • digital in a digital relay circuit Filter 'Effective value calculation circuit used. Since this is a well-known technique, we will only introduce its algorithm here.
  • Fig. 7 (e) shows the fault current when the fault current was a sine wave AC signal expressed by equation (3).
  • Light signal P 2x / P from the second photocurrent sensor 2 shows the difference current output S2x by the photocurrent sensor in Fig. 7 (g)
  • Fig. 7 (h) shows the effective value of the power supply frequency component of the difference current output S2x by the photocurrent sensor. .
  • a short-time error signal is generated immediately after the fault (equivalent to a peak value of 4kA for 0.01 seconds). Is not reached.
  • an error signal is generated for a time that cannot be ignored as shown in Fig. 7 (d) (equivalent to a peak value of 20 kA, 0.2 Seconds). This is because the power supply frequency component is represented as an error signal until the DC component is attenuated as shown in Eq. (16).
  • FIG. 7 (i) shows a signal in which an internal fault has occurred in the system shown in FIG. 2 and the fault current is expressed by the equation (14) with a DC component superimposed on 100%.
  • Figure 7 (j) shows the difference current output S 2x by the photocurrent sensor in Figure 7 (k), and
  • Figure 7 (1) shows the effective value of the power supply frequency component of the difference current output S 2x by the photocurrent sensor. Show.
  • Fig. 7 (m) shows the case where an internal fault occurs in the system shown in Fig. 2 and the fault current is a sinusoidal AC signal expressed by equation (3).
  • the optical signal P 2x from sensor 2 is shown in Fig. 7 (n)
  • the differential current output S 2x by the photo current sensor is shown in Fig. 7 (o)
  • the effective value of the power supply frequency component of the differential current output S 2x by the photo current sensor Is shown in Fig. 7 (p).
  • An object of the present invention is to detect a fault current superimposed with a direct current component, not only when an internal fault occurs, but also when an external fault occurs, without discriminating that the fault is an internal fault.
  • An object of the present invention is to propose a protection relay device using a photocurrent sensor that does not perform unnecessary operations.
  • the present invention provides two first and second photocurrent sensors that individually measure input and output currents at both ends of a protection section of a power system, wherein the first photocurrent sensor has an incident end,
  • the analyzer has an analyzer that performs analysis in two polarization directions of plus 45 degrees and a minus 45 degrees with respect to the polarization direction of the polarizer provided at the incident end, and an emission end for each of the analysis components.
  • a difference current detection unit that detects a difference current component from an output signal of the optical signal processing unit; a sum current detection unit that detects a sum current component from an output signal of the optical signal processing unit; and a difference current detection unit.
  • An operation amount calculating means for obtaining an operation amount from an output;
  • a suppression amount calculating means for obtaining a suppression amount from an output of the output means and an output of the sum current detecting means;
  • a protection relay device using a photocurrent sensor comprising: a determination unit configured to determine whether an accident is within the protection section or outside the protection section of the power system from the output of the operation amount calculation unit and the output of the operation ratio calculation unit. It is provided.
  • the present invention provides two first and second photocurrent sensors that individually measure input and output currents at both ends of a protection section of a power system, wherein the first photocurrent sensor has an incident end and It has an analyzer that performs analysis in two polarization directions of plus 45 degrees and minus 45 degrees with respect to the polarization direction of the polarizer provided at the incident end, and an emission end for each of the analysis components.
  • the first and second Differential current detecting means for connecting optical current sensors to each other and between the second photocurrent sensor and the optical signal processing unit by optical fiber transmission, and detecting a differential current component from an output signal of the optical signal processing unit.
  • Sum current detection means for detecting a sum current component from the output signal of the optical signal processing unit; and correction calculation means for obtaining individual input / output currents from the output of the difference current detection means and the output of the sum current detection means.
  • An operation amount calculating means for obtaining an operation amount from the correction operation means; a suppression amount calculating means for obtaining a suppression amount from the correction operation means; an operation from an output of the operation amount calculating means and an output of the suppression amount calculating means.
  • Operating ratio calculating means for obtaining a ratio, and determining means for judging whether the accident is within the protection section or outside the protection section of the power system from the output of the operation amount calculation means and the output of the operation ratio calculation means. Equipped photoelectric
  • a protection relay device using a flow sensor is provided. Further, the present invention is a protection relay device for monitoring an accident of a power system having a protection section, wherein the protection relay device includes:
  • a first photocurrent sensor disposed on one end side of the protection section of the power system, the first photocurrent sensor receiving the optical signal from the light source, Rotating the polarization plane of the optical signal in proportion to the magnitude of the first current flowing on one end side, and converting the first optical signal of at least one direction component of the optical signal whose polarization plane has been rotated.
  • a first photocurrent sensor that emits;
  • a second photocurrent sensor disposed at the other end of the protection section of the power system, wherein the second photocurrent sensor transmits the first optical signal from the first photocurrent sensor. Receiving the first optical signal, further rotating the polarization plane of the first optical signal in proportion to the magnitude of the second current flowing to the other end of the protection section of the power system, and further rotating the polarization plane.
  • a second photocurrent sensor that emits a second optical signal of one direction component and a third optical signal of another direction component of the first optical signal;
  • a first optical signal processing unit for obtaining a difference current output that is a difference between the first current and the second current from the second optical signal
  • a second optical signal processing unit for obtaining a sum current output that is a sum of the first current and the second current from the third optical signal;
  • a difference current detection unit that detects the difference current output of the first optical signal processing unit;
  • a sum current detection unit that detects the sum current output of the second optical signal processing unit; and
  • An operation amount calculating means for obtaining an operation amount from the output;
  • Suppression amount calculation means for obtaining the suppression amount from the output of the difference current detection means and the output of the sum current detection means
  • An operation ratio calculating unit that obtains an operation ratio from the output of the operation amount calculating unit and the output of the suppression amount calculating unit;
  • a protection means comprising: a determination means for determining whether the power gun has an accident inside the protection section or outside the protection section based on an output of the operation amount calculation means and an output of the operation ratio calculation means.
  • An electric device is provided.
  • the present invention is a protection relay device for monitoring an accident of a power system having a protection section, wherein the protection relay device includes:
  • a first photocurrent sensor disposed on one end side of the protection section of the power system, the first photocurrent sensor receiving the optical signal from the light source, Rotating the polarization plane of the optical signal in proportion to the magnitude of the first current flowing on one end side, and converting the first optical signal of at least one direction component of the optical signal whose polarization plane has been rotated.
  • a first photocurrent sensor that emits;
  • a second photocurrent sensor disposed at the other end of the protection section of the power system, wherein the second photocurrent sensor transmits the first optical signal from the first photocurrent sensor. Receiving the first optical signal, further rotating the polarization plane of the first optical signal in proportion to the magnitude of the second current flowing to the other end of the protection section of the power system, and further rotating the polarization plane.
  • a second photocurrent sensor that emits a second optical signal of one direction component and a third optical signal of another direction component of the first optical signal;
  • a first optical signal processing unit for obtaining a difference current output that is a difference between the first current and the second current from the second optical signal
  • a second optical signal processing unit for obtaining a sum current output that is a sum of the first current and the second current from the third optical signal
  • Difference current detection means for detecting the difference current output of the first optical signal processing unit
  • Sum current detection means for detecting the sum current output of the second optical signal processing unit
  • correction calculation means for obtaining individual input / output currents from the output of the difference current detection means and the output of the sum current detection means
  • Operation amount calculation means for obtaining an operation amount from an output of the correction operation means
  • Suppression amount calculation means for obtaining the suppression amount from the output of the correction calculation means
  • An operation ratio calculating unit that obtains an operation ratio from the output of the operation amount calculating unit and the output of the suppression amount calculating unit;
  • a protection relay device comprising: a determination unit that determines whether an accident is inside the protection section of the power system gun or outside the protection section based on an output of the operation amount calculation unit and an output of the operation ratio calculation unit.
  • the present invention also provides a method for detecting an accident in a power system having a protected section
  • the first photocurrent sensor sensing a magnitude of a first current flowing on one end side of the protection section of the power system
  • the present invention is a method for detecting an accident in a power system having a protection zone
  • the first photocurrent sensor sensing a magnitude of a first current flowing on one end side of the protection section of the power system
  • FIG. 1 is a configuration diagram illustrating an embodiment according to the present invention and illustrating a protection relay device using a photocurrent sensor.
  • FIG. 2 is a system diagram illustrating an embodiment according to the present invention and illustrating a protection relay device using a photocurrent sensor.
  • FIG. 3 is an example of an output waveform when fault current is measured according to the embodiment of the present invention.
  • FIG. 4 is a configuration diagram illustrating another embodiment according to the present invention and illustrating a protection relay device using a photocurrent sensor.
  • FIG. 5 is an example of an output waveform when a fault current is measured according to another embodiment of the present invention.
  • FIG. 6 is an explanatory diagram of a protection relay device using a conventional photocurrent sensor.
  • FIG. 7 is an example of an output waveform when a fault current is measured according to a conventional technique.
  • the output signal from the optical current sensors is x, the light P 2 x 2 component in the y-direction, there are P 2 y, conventional
  • the technology uses only one or the other.
  • FIG. 1 is an explanatory diagram showing an embodiment of a protective relay device using the photocurrent sensor of the present invention. Using optical signal P 2 y signal in the same way as using the optical signal P 2 x to determine a difference current signal S 2 x by the optical current sensor.
  • the differential current signal S 2 x by the photocurrent sensor obtained from the optical signal P 2 x is the difference between the current ii detected by the first photocurrent sensor 1 S and the current i 2 detected by the second photocurrent sensor 2. while has information of ii + i 2 which is a flow, the optical signal P 2 from y i ⁇ and i is the second sum current II- i 2 sum has information current output S The fact that 2 y can be obtained will be described below. Incidentally, the sum current of the protection section 9 of the power system i - i 2 and indicated Runowa, the inflow direction to the protected section 9 of both power system the sign of i have i 2 +, as one of the outflow direction By definition.
  • FIG. 1 shows a first photoelectric current sensor 1 including a polarizer 14, a Faraday element 11, and an analyzer 15, a second photoelectric current sensor 2 configured similarly to the first photoelectric current sensor 1, and a light source 12 And a first optical signal processing unit 4a comprising a photoelectric converter 16, a high-pass filter circuit 17, a low-pass filter circuit 18, and a divider 19, and a first optical signal processing unit 4a.
  • a second optical signal processing unit 4b an optical fiber transmission line 3a for transmitting an optical signal between the light source 12 and the first photoelectric current sensor 1, a first optical current sensor 1 and a second optical current
  • An optical fiber transmission path 3 b for transmitting an optical signal between the sensors 2, an emission end for emitting an optical signal P 2x having difference current information among the two emission ends of the second optical current sensor 2, and a first light
  • An optical fiber transmission line 3c for transmitting the signal processing unit 4a, and a sum current of two emission ends of the second photocurrent sensor 2.
  • Operation amount calculating means 6a for obtaining the suppression amount
  • the suppression amount calculating means 6b for obtaining the suppression amount from the outputs of the difference current detecting means 5a and the sum current detecting means 5b, the operation amount calculating means 6a and the suppression amount calculating means.
  • Operation ratio calculation means 7 for obtaining the operation ratio from 6 b, and operation amount detection means 6a and the output of the operation ratio calculation means 7 and the output of the operation ratio calculation means 7 determine whether the accident is within the protection section of the power system or outside the section. It consists of means 8.
  • the installation status of the first photocurrent sensor 1 and the second photocurrent sensor 2 in the protection section 9 of the power system and the configuration of the optical signal processing unit 4a are the same as those of the conventional technology.
  • the difference current output S 2 x by the photocurrent sensor is obtained from the unit 4a.
  • the optical signal guided by the optical fiber transmission means 3d is the P2y signal described in equation ( 5b ).
  • Another optical signal P 2 y from the second photocurrent sensor 2 is guided to the optical fiber transmission line 3 d and is incident on the photoelectric converter 16 of the second optical signal processing unit 4 b.
  • the sum current output S2y by the photocurrent sensor is obtained.
  • the sum current output S 2y by the photocurrent sensor is expressed by the following equation.
  • the error signal component [delta] x contained in (1 8 a) expression of the difference current component paragraph is included in the S 2x signal, the second term S 2 x signal.
  • ⁇ ⁇ , ⁇ 5 y is due to the transiently attenuated signal on which the DC component is superimposed, and occurs until the DC component is attenuated as expressed by equation (16).
  • the operating ratio k of the differential relay which is used as a protection relay, is expressed by the following equation as the ratio of the operation amount m to the suppression amount n.
  • Equation (18b) includes error signals ⁇ 5x , dy, but assuming that the magnitude is negligible, S2x and S2x obtained by the difference current detection means 5a
  • the method of calculating the operating ratio k expressed by Eq. (19) using S2y obtained by the sum current detection means 5b is shown below.
  • the motion amount m in equation (20a) is obtained by the motion amount calculation means 6a in FIG. 1 as in equation (21a).
  • the suppression amount n in the expression (20b) is obtained by the suppression amount calculating means 6 as shown in the expression (21b).
  • n I i 1 I + 1 i 2
  • the operation ratio k is obtained by substituting the expressions (21a) and (21b) into the expression (19) in the operation ratio calculating means 7.
  • the operation amount m obtained by the operation amount calculation means 6 a and the operation ratio k obtained by the operation ratio detection operation 7 are:
  • the judgment means 8 when the operation amount setting value is kl and the operation ratio setting value is k2, when m> k1 and k> k2, it is judged that an internal fault has occurred. Even if it does, unnecessary actions can be prevented in the event of an external accident.
  • the magnitude of the error component fluctuates depending on the magnitude of the fault current and the sensitivity of the applied current sensor. However, if there is a large difference between the operation ratio k when an external accident occurs and when an internal accident occurs, the judging means 8 can determine whether the accident is inside or outside the protected area.
  • the assumed maximum fault current of the power system is 33 kA
  • the DC component is assumed to be 100% superimposed
  • the time constant is set to 10 Oms.
  • the applied optical fiber sensor is Similar to surgery, and is lead glass fiber-type optical current sensor having a wavelength 1550 nm, the Verdet constant V is 3. 93X 10- 6 using [r ad / A].
  • f1 is used here as a typical example of external accidents.
  • f1 is used here as a typical example of external accidents.
  • a single-side power supply is considered to be the same for the fl side and the f3 side, so the fl side is a representative example.
  • Figure 3 is a diagram for explaining that the operating ratio k obtained from Eq. (22) has a sufficiently large difference between an internal fault and an external fault.
  • the fault current value and the optical fiber constant Is substituted into the equations (14), (5a), (5b), (6), (17), (21a), (21b), and (22), and calculated.
  • Figure 3 (a) shows the fault current i (t) on which the DC component expressed by Eq. (14) is superimposed, and shows the waveform of fault current i 33 kA.
  • Figures 3 (b) to 3 (d) show the case of an external accident, Figure 3 (b) shows the amount of operation m, Figure 3 (c) shows the amount of suppression n, and Figure 3 (d) The respective operating ratios k are shown.
  • Fig. 3 (e) to Fig. 3 (g) show the case of a power supply arrangement on both sides of the internal fault.
  • Fig. 3 (e) shows the operation amount m
  • Fig. 3 (f) shows the suppression amount n.
  • the fault current shows the following four types.
  • Figures 3 (h) to 3 (j) show the case of a single-sided internal power supply arrangement.
  • Figure 3 (h) shows the amount of operation m
  • Figure 3 (i) shows the amount of suppression n
  • Figure 3 (j) shows the amount of operation.
  • Each shows the ratio k.
  • Fig. 3 (d) which shows the operating ratio k of the external accident case
  • Figs. 3 (g) and 3 (j) which show the operating ratio k in each case of the internal accident power supply arrangement and the internal accident single-side power supply arrangement.
  • the operating ratio k is 100% for both the single-ended power supply and the double-ended power supply in the case of an internal accident, but temporarily increased to more than 20% in the case of an external accident. Then it is obviously a small value.
  • the operation amount m is determined by the determination means 8 to be smaller than the operation amount setting value k1. Even if it is large, if the operation ratio k is smaller than the operation ratio set value k2, it is determined that an external accident has occurred, and unnecessary operation of the protective relay can be prevented.
  • FIG. 4 is an explanatory diagram showing another embodiment of the protection relay device using the photocurrent sensor of the present invention.
  • the same or corresponding portions are denoted by the same reference characters and description thereof is omitted.
  • equations (5a) and (5b) are rewritten as follows using approximation of equation (7).
  • the error current component of paragraph (26 a) formula is contained in S 2x signal
  • the error signal component monument second term is included in the S 2 x signal. 2 (ii ⁇ i 2 ).
  • the first term of equation ( 26b ) is the sum current component included in the S2y signal
  • the second term is the error signal component included in the S2y signal.
  • the output S 2x from the difference current detecting means 5 a and the output S 2 y from the sum current detecting means 5 b are corrected by the correction calculating means 5 c as follows.
  • 2 (i ⁇ i 2 ) is removed. That is, as shown in the (2 7 a) (27 c ), S zl, the S z 2, S z 3 define, (28 a), obtaining the i have i 2 as (28 b) expression.
  • the operation amount operation means 6 c and the suppression amount operation means 6 d use the following equations (29a) and (29 b) to calculate the operation amount m and the suppression amount. n is required.
  • the motion amount m obtained by the following equations (29a) and (29b) in the motion amount calculating means 6c and the suppression amount calculating means 6d, and the suppression amount n are calculated by The motion ratio k is determined.
  • FIG. 5 is a diagram for explaining that the operation ratio k obtained from Eq. (30) has a sufficiently large difference between an internal accident and an external accident. It shows the result of calculation under the same conditions as used.
  • Figures 5 (b) to 5 (d) show the cases of external accidents.
  • Figure 5 (b) shows the amount of movement m
  • Figure 5 (c) shows the amount of suppression n
  • Figure 5 (d) shows the amount of movement k.
  • I have.
  • Figs. 5 (e) to 5 (g) show the case of the power supply arrangement on both sides of the internal accident.
  • Fig. 5 (e) shows the operation amount m
  • Fig. 5 (f) shows the suppression amount n.
  • the accident current shows the following four types.
  • i x +7.5 kA
  • i 2 +7.5 kA
  • Figures 5 (h) to 5 (j) show the case of a single-sided internal power supply arrangement.
  • Figure 5 (h) shows the operation amount m
  • Figure 5 (i) shows the suppression amount n
  • Figure 5 (j) shows the operation amount.
  • the ratio k is shown.
  • the operating ratio k is the case of a single-ended power supply in the internal accident case.
  • the operating ratio k is occasionally increased to 5% in the case of an external accident, but it is clearly smaller than that of the internal accident.
  • the operation ratio k is If the operation ratio setting value is smaller than k2, it is determined that an external accident has occurred, and unnecessary operation of the protective relay can be prevented.
  • the protection relay device using the photocurrent sensor according to the present invention it is possible to prevent unnecessary operation of the relay even when the external accident force S occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

L'invention concerne un appareil de relais protecteur comprenant deux détecteurs de courant photoélectrique installés aux deux extrémités d'un section protégée d'un système d'énergie qui détecte non seulement un défaut interne mais discrimine aussi entre un défaut interne et un défaut externe sans fausse lecture même si le courant de défaut est un courant comportant une composante CC superposée. Des premier (1) et second (2) détecteurs de courant photoélectrique sont installés aux deux extrémités d'une section de protection (9) d'un système d'énergie. Des lignes de transmission par fibres optiques (3a à 3d) sont connectée en série à une source lumineuse (11), à un premier détecteur de courant photoélectrique (1), à un second détecteur de courant photoélectrique (2), à une première section de traitement de signal optique (4a), et à une seconde section de traitement de signal optique (4b). Des moyens de mise en oeuvre d'une quantité d'action (6a), des moyens de mise en oeuvre de quantité de suppression (6b) et des moyens de mise en oeuvre de taux d'action (7) déterminent une quantité d'action, une quantité de suppression et un taux d'action à partir d'un signal de courant différentiel provenant de la première section de traitement de signal optique (4a) et une somme de signal de courant de la seconde section de traitement de signal optique (4b). Même si des moyens de jugement (8) détectent que la quantité d'action dépasse une valeur réglée, le défaut est jugé externe si le taux d'action est inférieur à une constante, ce qui empêche une action non nécessaire du relais.
PCT/JP2003/001662 2002-02-18 2003-02-17 Appareil de relais protecteur comprenant un detecteur de courant photoelectrique WO2003069754A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2003568757A JP3802028B2 (ja) 2002-02-18 2003-02-17 光電流センサを用いる保護継電装置
AU2003211341A AU2003211341A1 (en) 2002-02-18 2003-02-17 Protective relay apparatus comprising photoelectriccurrent sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002039585 2002-02-18
JP2002-39585 2002-02-18

Publications (1)

Publication Number Publication Date
WO2003069754A1 true WO2003069754A1 (fr) 2003-08-21

Family

ID=27678257

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/001662 WO2003069754A1 (fr) 2002-02-18 2003-02-17 Appareil de relais protecteur comprenant un detecteur de courant photoelectrique

Country Status (4)

Country Link
JP (1) JP3802028B2 (fr)
CN (1) CN100399660C (fr)
AU (1) AU2003211341A1 (fr)
WO (1) WO2003069754A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103715650B (zh) * 2014-01-20 2016-06-29 哈尔滨工业大学 基于法拉第磁光效应的差动保护装置
CN103730884B (zh) * 2014-01-22 2016-02-10 国家电网公司 一种光子差动保护装置
CN104158161B (zh) * 2014-08-25 2017-02-22 哈尔滨工业大学 基于光学电流传感器的差动保护装置
KR101770926B1 (ko) 2016-12-30 2017-08-23 엘에스산전 주식회사 직류 성분에 의한 전기적 외란 검출 방법
CN111224387B (zh) * 2020-01-20 2021-03-16 山东大学 一种基于磁光测量元件的相差保护方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000059987A (ja) * 1998-06-01 2000-02-25 Tokyo Electric Power Co Inc:The 故障判定機能を備えた光ｃｔ
JP2000266787A (ja) * 1999-03-18 2000-09-29 Hitachi Ltd 光電流センサ
JP2001050988A (ja) * 1999-08-09 2001-02-23 Takaoka Electric Mfg Co Ltd 光電流センサを用いる電流測定方法およびその装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341737B (en) * 1998-09-17 2003-03-05 Alstom Uk Ltd Fault protection apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000059987A (ja) * 1998-06-01 2000-02-25 Tokyo Electric Power Co Inc:The 故障判定機能を備えた光ｃｔ
JP2000266787A (ja) * 1999-03-18 2000-09-29 Hitachi Ltd 光電流センサ
JP2001050988A (ja) * 1999-08-09 2001-02-23 Takaoka Electric Mfg Co Ltd 光電流センサを用いる電流測定方法およびその装置

Also Published As

Publication number Publication date
JPWO2003069754A1 (ja) 2005-06-09
JP3802028B2 (ja) 2006-07-26
CN100399660C (zh) 2008-07-02
AU2003211341A1 (en) 2003-09-04
CN1623261A (zh) 2005-06-01

Similar Documents

Publication Publication Date Title
JPS613075A (ja) 送電線用事故区間判別装置
JP4375881B2 (ja) 光電流センサを用いる保護継電装置
WO2003069754A1 (fr) Appareil de relais protecteur comprenant un detecteur de courant photoelectrique
JP4543007B2 (ja) 電流差動保護システム
JP5750313B2 (ja) 接地極付きコンセントの配線確認試験器及び方法
JPH0511269B2 (fr)
EP0414236B1 (fr) Transformateur optique
WO2023085536A1 (fr) Capteur de détection de courant d'arc à courant continu pour une installation dans un circuit à courant continu de grande capacité et dispositif de détection d'arc à courant continu l'utilisant
JP2009293991A (ja) シースアース回路監視装置
US6998994B2 (en) Failed filter arrest indicator and method for use in multiple arrester location
JP2551564B2 (ja) 電力設備用事故区間検出装置
JP4065243B2 (ja) 故障判定機能を備えた光ｃｔ
JP5171399B2 (ja) 電力ケーブル保護継電器誤動作防止装置
JP2000321316A (ja) 並行二回線地中送電線の地絡事故検出方法
JP3232580B2 (ja) 零相電圧検出装置
JPS6290579A (ja) 電力設備用事故区間判別装置
JPS6279373A (ja) 送電線用事故区間判別装置
JPH06289067A (ja) 事故点標定装置用電流検出回路
US20230400531A1 (en) Monitoring the operation of an electrical coil assembly
KR20230067208A (ko) 비접지 전원 계통의 절연 감시 장치
JP2007256023A (ja) 変位電流バイパス法による損失電流測定方法およびその損失電流測定回路
JP2959228B2 (ja) 光変成器
JPS6188167A (ja) 送電線用区間判別装置
JPH03277979A (ja) 零相電圧検出装置
JPH02210270A (ja) 光式零相・正相電流検出装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2003568757

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 20038028379

Country of ref document: CN

122 Ep: pct application non-entry in european phase