TWI332737B - Protective relay apparatus - Google Patents

Description

[Technical Field] The present invention relates to a technique for processing a system of electricity of a power system, particularly regarding obtaining a system power of a power system, and using the power to protect a relay operation To protect the power system's digital protection relay. [Prior Art] When the power system is protected by a digital protection relay device, an analog quantity (anai〇g quantity) obtained by a voltage transformer and a current transformer of the power system is used. The system's power is converted to digital data required by the digital processor for relay operation. First, it is converted into an easy-to-handle size by inputting the conversion device. Then, the analog filter is used. After removing the local frequency component that is not required for the operation, sampling is performed at a predetermined interval and the analog data is converted into digital data by an analog/digital (hereinafter referred to as a/d) conversion device. Then, various methods have been proposed for such a protective relay device, i.e., the input portion for correcting the system power amount of the power system is corrected for the error of the so-called analog input portion. For example, Patent Document 1 discloses a configuration in which a correction value of a system power amount can be calculated one by one by manually, and it is not necessary to combine an input conversion device that converts a system power amount into a power of a predetermined size, and converts an input. The output (analog) of the device is converted into a digital power A/D conversion device. That is, the protection relay device is input to the protection relay (g_d coffee) via the transformer installed in the power system and the 24144pif power. The input conversion device is composed of a variable _ and a converter, and converts the system power of == into a predetermined amount of power and outputs it to a/d, and the conversion device outputs the output from the wheel-in conversion device. After filtering (mteHng) (mtwit), A/D conversion is performed, and the power is output as a digital value. As a component of the resistors and capacitors used in the devices that are placed in the A/D-turned device, there is an individual's differential integrated circuit (1_^, therefore, The input data differs from the phase or amplitude value, and therefore, when the correction is processed, the difference is performed in the protection relay set disclosed in Patent Document 1, and there is a storage error. The first memory device ―=, 'money device, and the city uses the error stored in the first and second records (hereinafter referred to as the eigenvalue) to correct the input data. Li Wen! ^1] Japanese Patent Japanese Laid-Open Patent Publication No. 2004-274930; in the protective relay device disclosed in the document 1, it is necessary to store #_ by the f-movement to the first note "towel. That is, use voltage." A meter such as an ammeter is used to measure an error of a phase difference between the input power of the input conversion device and the amount of power discharged, and an error with the field value (&gain), and store the value based on the measured value. In the memory device. 1332737 24144pif must be pre-processed by manual method. That is, the amount of electricity measured by the measurer is stored, and the measured value of the profit increase is input to the first memory device. And the storage operation will take a lot of labor and time, and thus, the data storage becomes the main cause of the correction error Ο ' [Summary of the Invention] The present invention is completed after considering the above situation, Qian set, the succession of the t device is to provide power, the error of the specified wheeling device and the system line correction operation and protection relay operation of the a / 拖 tow system, thereby maintaining the error The other purpose of Ben Maoming is to provide a kind of lightning protection, protect the relay device in the input conversion device and A/D, =: clothing, and when replacing the faulty pair (4) device, when there is no need for a group, ^ failure, The job of correcting the value, that is, no correction work is required. The σ is broken to calculate the present invention, and the other object is to provide a protection relay device capable of reducing the work load for storing the input characteristic of the conversion device, reducing the operation, the setting, and the A/D conversion in order to solve the problem. In view of the above problems, the present invention provides a biometric correction error. It samples the system power of the power system and puts it into the above-mentioned A/D conversion value for protection. The relay has been converted, and the input conversion device is used to convert the above-mentioned system and the relay device conversion device will come from The input conversion device is quasi-electrical; the first characteristic value calculation device converts the characteristic value into a number, and the second characteristic value calculation device describes the conversion device. Charging the feature value of the input conversion device 9 1332737 24144pif; the first memory device 'saves the feature device of the A/D conversion device that is set by the above-mentioned i-th feature=disappearance, and saves by the above 2 eigenvalue meter = input characteristic value of the conversion device; the correction value meter first indicates that the A/D conversion device in the first memory device is present, and the input 嶋====:: and the correction device in the device 'Use the above correction value to correct the above [Effect of the invention] Quantitative input == eigenvalue of the system for taking power from the power system of the power system': the error between the analog input of the object 4 The inner material is highly efficient and can be found in (4): input or wheel current, and the characteristic value can be automatically saved in the corresponding characteristic value of the conversion device in the device, and [implementation;] EMBODIMENT OF THE INVENTION The first embodiment of the protective relay device of the present invention is shown in FIG. 1 . FIG. 1 is a block diagram showing the first embodiment of the protective relay device according to the present invention. 5 保护 继 继 继 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 . The output (analog) electric quantity b from the input conversion device 丨2 is input to the A/D conversion device 13, and is filtered by the conversion device 13 and converted into a digital electric quantity c after the high frequency forming tool is removed, and then input to the arithmetic device. Broken 14 by the government processor unit (micr〇pr〇cess〇r, MP^). a central processing unit (CPU) or the like and a memory (mem〇ry) and the like, and includes: a first direct + device 15 'calculates a characteristic value of the A/D conversion device 13; ί device 16 ' Calculate the characteristic t of the input conversion device 12, and determine the input conversion device 12 and the second=== value; the correction device 18 corrects the a/d conversion and the correction value by the correction value of the correction value. /D = Π19, using the F and material corrected by the above-described correction device 18 to perform a protection relay operation such as a relay operation. 13(4) The value of the elder brother!^== The characteristic value of the a/d conversion device calculated by the device 15 is the second input and the characteristic value e 2i, 22 of the second turn county 12 is set, for example, by the non-county device 22 . The first and second memory devices 5 nonvolatile memory structure 1332737 24l44pjf into 0 wood 1 long music 2 f 恃 恃

The values are input to the correction value meters 21 and 22, respectively, and the values (characteristic values) f and g are stored in the correction device 18. In 修修1 2 17' and outputting the correction value h to the output of the device I3 (the digital ray t is set to 18, the A/D conversion positive value h' is respectively rotated, and the repair is performed to the protection subsequent correction value calculating device 17 The conversion value is i. The electric relay 19 outputs the corrected A/D to the protection relay device 19 of the protection relay device digital input wheel, and is connected to open the interrupter 25, by the The digital wheel-in and output device 24 is opened and closed, and can be connected to the protection relay device of the breaker 25 to protect the safety of the power system. The electric device, and then the self-contained protection power system Digital protection relay 19 and digital to ^ relay device to remove and protect the relay computing system system electricity "Electric: = = constitutes the power system display, set 10 transmission: conversion device i 12 composition The current value Ιιη input to the converter 29' of the converter 28 is connected to the voltage value v〇ut of the predetermined electric level, and is outputted. 3 is a block diagram showing the protection of the a/d conversion device π in the relay device 1A. The A/D conversion device 13 includes: a plurality of filters 31, removing high harmonic components that are not required for the operation; a multiplexer 32, sequentially switching and outputting the frequency harmonics by filtering and filtering A plurality of inputs of components; and an A/D converter 33, in the future, 24144pif is converted from the output (analog signal) of the multiplexer 32 into a digital signal (electric quantity) c that can be processed. FIG. 4 is a diagram showing the input conversion device 12. A diagram showing the connection relationship between the transformer 27 and the filter 31 of the A/D converter 13. The transformer 27 and the filter 31 are connected via a detachable cable 35, and the cable 35 can connect or disconnect the transformer 27 and the filter 31. In Fig. 4, when the cable 35 is removed, the voltage can be directly applied from the outside to the input portion of the filter 31 of the A/D converter 13, that is, the terminal A. The converter 28 of the input switching device 12 The connection relationship with the filter 31 of the A/D conversion device 13 is also the same as described above. Fig. 5 is a view showing a modification of the connection relationship between the input conversion device 12 and the A/D conversion device 13. The above modification is: via a switch 36 to open and close freely The transformer 27 of the input conversion device 12 is connected to the filter 31 of the A/D conversion device 13. When the switch 36 is turned off, the filter 31 of the A/D conversion device 13 can be directly applied to the terminal A portion from the outside. The connection form of the voltage converter, the converter 28 of the input conversion device 12, and the filter 31 of the A/D conversion device 13 is also the same as described above. On the other hand, the multiplexer 32 provided in the A/D conversion device 13 is as shown in the figure. 3 and FIG. 6, the output (analog signal) filtered by the plurality of filters 31 is sequentially switched and output to the A/D converter 33. A terminal B portion to which the filter 31 or the like is not connected is provided in one input portion of the multiplexer 32. A voltage can be applied directly to the terminal B portion from the outside. Further, the digital electric quantity c, 1332737 24144pif, which is A/D converted by the A/D conversion device 13, is input to the arithmetic unit 14. As above, the +, and _ conversion device job resistance,; = „12 components, there are individual differences, etc. ^ + the input data and the output of the Bellow 'phase and amplitude value (gain: gain) exists The second input and the second conversion package 412, the system obtained from the power system = the required analogy (output) power b, by A/I) ίΪί L, the high _ wave of ff b is sampled, =, is the digital power e and is input to the computing device 14. When the computing device 14 performs the relay operation on the digital power c, it is necessary to perform the red-handed operation on the above-mentioned she and the vibrating county. 14 has a self-A/D conversion split 13 input digital power. The characteristic value d of the A/D conversion device 13! Eigenvalue calculation. The eigenvalue d is the amplitude value (gain) of the input and output when the sine wave (sinewave): phase difference = the device 13 is changed, and the characteristic value d of the A/D conversion device 13 is calculated. Two-machine interface (manmaChineinterface), etc., manual work: "A/D converter eigenvalue calculation mode" is not determined. In the case of entering the customs, "A/D "converting device characteristic value calculation mode" before the round, and the setting of the conversion device characteristic value calculation mode" and the rated sub-A part of the wave machine 31 The force ° is specified as large + opposite.卩苑 adds the following voltage, that is, the specified size, and the A-string voltage of the A-part is the same fresh and has a predetermined phase difference. The simplest example of the 14 1332737 24J44pif phase difference is the case of 0 degrees. The A/D conversion device j 3 calculates processing according to the flowchart of Fig. 8 . Calculating the eigenvalues of the A/D converter Π (

Sd' is judged in step S2 whether or not it is "conversion device feature mode". When it is judged as "A/D conversion device characteristic value calculation mode: line amplitude value calculation (step S3).

In the amplitude value calculation (in step SSO, the A/D converted data corresponding to the input to the filter 31 of the A/D converter 13 , that is, the voltage input to the terminal ? a portion) is used to calculate Amplitude value (electric dust value). The method of using the data after A/D conversion, that is, the instantaneous value (in_taneous value) to calculate the amplitude value of the sine wave, is performed using the following equation. [Number 1] Sine wave (voltage value) Vcai is represented by this formula:

Vcai = V^〇2 + V,2 ...... ( 1 )

The eigenvalues are performed. Among them, Vo'V! is an instantaneous value (voltage value), and the phase difference between % and % is 90 degrees. The ratio of the amplitude value Vm obtained by the equation (1) to the ideal amplitude value brother (1) when the A/D conversion device 13 does not have an error is obtained by the following equation. [Number 2]

Vrad — Vid|/Vcai (2) In the phase st (step S4), according to the input of the A/D converter 13/waves 31, that is, the voltage input to the terminal a The phase difference ead is calculated by the data of the corresponding a/d conversion and the data of the A/D to 24l44pif M corresponding to the voltage input to the terminal B. For example, a method of calculating the phase difference of two sinusoids using an instantaneous value, for example, calculating a phase #A., ad by a well-known zero-cross method. The amplitude value calculation (step S) and the phase calculation (step S4), '' are performed on each of the plurality of filters 31. In the feature value storage (step s5), the U phase difference ? for each filter 31 is stored in the first memory straight 21 as the feature value d. On the other hand, the second characteristic value calculating means in the arithmetic unit 14 is switched to the characteristic value 6 of the input switching means 12. Then, when calculating the characteristic value e 0 of the input calculation module, the setting is set to the "round-in conversion device characteristic value conversion dream t-counter-counting value calculation mode" and the above-mentioned "A/D person == The same is true for the sinusoidal or input sinusoidal current ("?- aspect, self-terminal" from the external-two "input conversion eigenvalue calculation mode" before the input of the conversion device characteristic value calculation mode" B_A/D turns to two; the following electric dust 'that is, the sinusoidal voltage of the specified size two device I2 or the input to the input is converted to a specified phase difference. This; ^16 electricity is the same frequency, and has the phase defined here The difference is the phase difference between the two voltages of the terminals A and B of the terminal in the case of 16 1332737 24l44pif, which is judged to be the input characteristic value calculation of the input conversion device, and is judged as "the input conversion device characteristic value calculation mode". ^ ς, perform the vibration field value (step § 9). Calculate the amplitude value (step $ towel, use the voltage applied to the input conversion device 12 2; then 'if the amplitude value obtained by the equation (1) I and input conversion, set 12 and A / D conversion 13 than over the amplitude value of the error is not Vidhmai not present an amplitude ratio Vrtotal, it can be represented by the following equation [Expression 3] °

Vrtotal = Vidlt〇ta丨/Vcal (3) The phase difference is detected after the amplitude value calculation (step S9), and the phase calculation is performed (step Si0). In the phase calculation (step Si〇) +, the data after the disk is applied to the input conversion device f 12 (four) voltage or the input current is converted, and the multiplexer 32 input from the terminal B portion to the A/D device 13 The voltage is subjected to the A/D converted data to calculate the phase difference. For the calculation of the phase difference, the phase difference 0tQtaj can also be obtained by, for example, the well-known zero-crossing method. After the phase difference etotai is calculated, the characteristic value of the wheel-in conversion device 12 is calculated by inputting the conversion characteristic calculation (step Sn). The following I ask for the characteristic value e of the 1332737 24l44pif 'ipt wheel-in conversion device 12 (Vrit [number 4] ΠΡ

Vript=Vrt〇tai/Vrad ...... (4) 'ad material Here, vrad and ead are saved in the first! Further, in the memory device, the amplitude values of steps S9 to sn are calculated by the conversion device characteristic value calculation, and are performed by the respective signals t, and the converter 27 and the converter 28. The transformers 27 and the converters are stored in the second memory device & the fine memory is stored in the second memory device & the second eigenvalue meter included in the step computing device ( # Characteristic value calculation device 16 is used in the operation device 15 and the brother 2 ^ ^ 运用 using the digital protection relay device 〖π 夕月" in the "A/D conversion device eigenvalue calculation / set eigenvalue calculation mode" When the shape energy τ is subjected to the secondary input conversion device Η), it is not necessary to set the second bit =! protection relay "input conversion device characteristic value calculation mode" or the correction value calculation means 17 of the arithmetic device 14 to obtain the conversion device 12 And the second characteristic of the A/D conversion device i3: into h. The correction value calculating means 17 is stored in the second value (Vrad, 9ad) and held in the second memory = 2

7totaI value g (~, ')' and the following formula is used to determine the round-robin transition; the comprehensive characteristic value of the temple sign A/D converter 13 (v_converting device 12 and 18 24l44pif [number 5] (6 ) (7)

Vrt〇tal-Vript/Vrad 3t〇tai=eipt-e ... KI) In-conversion: set t/ and let: the correction value h (V - the well-known formula to find the correction value h (k〇, k]). 精" [Number 6] ¥v_Sin (θτ—, Journal just) /sin (θτ) ^V^.-sin C0tgt-0total) /sin (θτ) (9) Rate ' f It is a medium (W, ^ is a value of 'f° is the rated frequency and then 'the correction value 匕° ^ obtained by the correction value calculation means 17 is used, and the well-known following formula is used and the correction means I8_ is utilized. Correct A/D conversion data. Set 18 to [7] Y(m) = k0.x(m) for claws]) Sample ± where X(m) is the latest sampling, X(m-1) For the second owe:) 7%·A/D conversion data, γ(5) is the revised data.

The positive device 18 uses the correction value h (k〇, k) obtained by the correction value calculation device 17 and corrects the A/D conversion f material corrected by the A/D correction device 18 by the equation (10). Converting the value # to the protection relay computing device 19 to perform the 彳; ^ value) input error 雊 + . Fu Zeng Zhuang _ 叮 叮 〇 〇 · · · · · · · · 。 。 。 。 。 。 。 。 。 。 。 。 By protecting ~.,, the private operation 4 is set to perform the protection relay operation, and the output device 24 is actuated to make the interrupter 25 actuate to protect the ^24l44pif i〇, ^p down to the ground from Figure 1 The digital protection relay device memory device St changing device 12, the A/D conversion device 13, and the i-th and second-connection are shown. Then, it is private and can be connected to the digital protection relay device 10 and the second memory conversion device 12, the A/D conversion device 13, and the first protection relay device. The device 10, or detachable from the socket, can be used with well-known bonding elements using connectors and inserts. First, the action of the protective relay device 10 will be described. In the case where the A/D conversion is installed as the input conversion device 12 for protecting the relay device 1G, the input conversion device 12 in which the characteristic error of the individual is set to one of the electrical components (components) is set to be specified. For example, Figure 9 shows the input of sinusoidal waves. Then, when the contact portion B of the,,,,,, is pressed to the multiplexer A/D of the A/D conversion device 13, the tribute of the peak value 1 corresponding to the input of the input conversion device 12 is The gain and the phase difference are relative to the gauge: the voltage is a predetermined size, and is the same frequency as the sinusoidal voltage or the sinusoidal current of the applied or input phase Xuanyuan into the conversion device 12: The phase difference. The error degree of the gain increase, that is, the eigenvalue, is the 'total amplitude ratio VrtQtal obtained by the equation (3), and the characteristic value of the phase difference is the phase difference $ [number 8]. Now, the input conversion means 12 is represented by the following equation. The input is Vin.sin (co〇.t) 20 24l44pif where '(〇〇= 2af0. [9] If the conversion data of the ideal sampling required by the input conversion device 12 and the A/D conversion hand 13 is set to χ (m) ' is expressed by the following formula: X (m) =kidl-Vin.sin (-0tgt) ......(11) [10] Continually, by constructing the input conversion device 12 and A/D conversion The error of the characteristics of the parts of the device 13, the A/D conversion data X (also) is X ( m) = (kicn/Vrt〇tal) · νίη.8ίη ( -0total) (12) before sampling The A/D conversion data χ(m−丨) is X(ml) = (kidl/Vrt〇tal) ·νίη·δΐη(-θιοί3Γθτ) (l3) On the other hand, if the correction value calculation means 17 is used The calculated correction value h (k〇, ki) is used to correct the a/D conversion data X (m), X (ιη~ !)', and the corrected A/D conversion data Y(m) is obtained by (8) The formula ~(ΐ0) is expressed by the formula [11] Y (m) =k〇-X (m) +k, -X (m-1) = {Vr T〇tai.sin (0T—etgt+0total) /sin (θτ) } 'kidi/Vrt〇ta|.Vjn'sin(-0t〇tai) + {Vrt〇tai-sin (0tgt-0total) /sin ( Θτ) } 'kidi/Vriota)·Vjn'Sin ( -θ|0^3)-θχ) ={kidi-Vin/sin ( θτ) } {sin ( 0T-etgt+0totai) -sin (-0total) + Sin ( 0tgt-0tota,) -sin (-0t〇tar6T) } 21 1332737 24144pif = {kidi.Vin/sin (θτ) } [{cos (eT-0tgt+20total) -cos (0T-0tgt) }/2 + {cos (0tgt+0T) -cos (0tgt-20tota,-et) }/2] ={kidi.Vin/sin ( θτ ) } [{cos (0tgt-0T-20total) -cog (0tgt-0T) }/2 + {c〇s (0tgt+0T) -cos (0tgt-0T-20t〇tai) }/2]

-{kjdi*Vin/sin( θτ ) }· {cos( 0tgt + θτ ) — cos ( 0tgt− θτ ) }/2 ={kidrVin/sin (θτ) }.{sin (-0tgt) -sin (θτ) } = kidi.Vin.sin (-0tgt) ......14 (14) is the same as (η), and the required ideal A/D can be obtained by the correction process of (i〇). Convert data γ (m). Further, the traits are classified into the feature value e of the input conversion device 12 and the feature value d of the A/D conversion device 。. The amplitude ratio (the characteristic value of the gain) V_ and the phase difference θ_ are comprehensive characteristic values indicating the Qiukou de-input conversion device 12 and the A/D conversion device 13. If the input conversion device 12 is to be

The /P special device of the A/D converter 13 is v Ω bamboo d. It is (vrad, ead), and then it is synthesized and then r"ΐίΓ can be decomposed in the same way as (1) and (7). The _-turn characteristic value calculating means 15' can directly find the characteristic value "乂" of the =3. State; input Ϊ: make eight electric: view 35 or switch 36 in the off-state 13 characteristic value d =, to the characteristics of the direct conversion device I2 {te (V., two-input conversion device, νηρί, Yi 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 The change of the heart (7) is the equation (4) and (5) & 'Indirectly find the enthalpy value e (vript, eipt) of the wheel-in conversion device. ' As described above, the memory device 21 stores A. /

The characteristic value d(H) of 13 is stored in the second memory display 22 as the characteristic value e (Vript, %) of the input/converting device 12. The characteristic value d of the A/D conversion device and the characteristic value e of the input conversion device 12 are respectively at the first! And maintenance management (maime job (3) management) in the "remembering device 21, 22; at least one of the reading device's reading device 12 and the A/D converting device 13 for protecting the relay device ίο At this time, the input conversion device (4) that generates the failure is replaced with the normal new input conversion device 12 or the A/D conversion device 13.

When the input switching device generates a failure, it is replaced with a normal new conversion: switching device 12, and the second storage device 22 is also replaced with a second storage device that holds the characteristic value e of the new input conversion device 12. 22{> As described above, when the input conversion device 12 is replaced, since the second memory device 22 is also replaced, the correction operation of the error of the analog input portion is not required to be corrected and rapid replacement can be performed. Further, when the A/D conversion device 13 is replaced, the first redundant device 21 is also replaced at the same time, whereby the same effect is obtained. Moreover, when the characteristic value e of the input conversion device 12 is saved, it is not necessary to perform 23 1332737 24l44pif for 7 operations, and the measurement is performed by using a voltmeter and an ammeter, etc. by manual 3, and the measured value is stored in the second memory device. 22 in. The characteristic value e of the wheel conversion device 12 can be automatically stored in the second memory skirt 22 only by applying a predetermined current. [Second Embodiment] Fig. 11 is a block diagram showing a second embodiment of a protective relay device according to the present invention. In the protective relay device which is not provided in the second embodiment, the protection relay device 10 is added with the third memory device, and the other configuration and operation are the same as those of the protective relay device of the first embodiment. Therefore, the same components are denoted by the same reference numerals, and the description of the third memory device 40 is omitted, and the ship value d of the A/D conversion device stored in the memory device is copied and reproduced, and is also reproduced in the memory device 22. The characteristic value of the input county 12 can be copied and stored in the second memory device 21 in the third memory device 4G. Similarly to this, the input/conversion device 12e stored in the third storage device 4G can be copied and stored in the second storage device 22. The digital protection relay device 1A shown in the main diagram u can copy and store the first memory device 21 and the third memory device 4 () ^ ' wherein the above program is based on an instruction from a human-machine interface not shown. Built in. Similarly, the data between the second memory device 22 and the third memory device 40 can be copied and saved. 24 1332737 24144pif The characteristic value d of the digital A/D converter 13 shown in the second embodiment, and the first memory and memory stored in the characteristic values of the electric device 10A, the recording device 21, and the input conversion device 12 When the device 22 is faulty, the component / can be played, and when the stored second protection relay device 10A is used, '= can. : When a fault occurs, the first memory device 21 1 memory device: the memory device 2 is "in the new"! The memory is always: the characteristic value 4 of the new first A/D conversion device 13 is stored. In 罝21, it is not guaranteed. Therefore, in the third memory device 40, the characteristic value d of the pre-production, one-system change device U, and the feature I first = the new one for saving the A/D conversion 1 in the memory device 21. The system is saved in the updated! In the memory device 21, the levy value d is copied to the correction operation of the error stored in the analog input portion of the set 13, and the correction A/D conversion device is replaced. Further, when the second memory device 22 is malfunctioning, the same operation can be performed when a memory device 21 is faulty, and the second memory device 22 can be quickly and efficiently replaced with the first #2, which can be short. [Third embodiment] Fig. 12 is a block diagram showing a configuration of a digital protection relay in accordance with the present invention. f. Third embodiment of the material device, the digital protection relay device shown in the third embodiment - the protective relay device 1 shown in the second embodiment is not t (. +. · r , A 茭In the case of the configuration, the communication interface (C〇mmUmCatlonmterface) 4 is the same as the configuration in the second bearing state. Therefore, the same symbol is attached to the same configuration, and the description of 25 1332737 24144pif is repeated. 1 Interface 41 and 】 Memory device 2] and 苐2 memory device connection. Communication interface 41 communicates with computer science equipment (not _) via wireless or wired communication device. Digital protection relay shown by Zhe 3 In the device 10B, the characteristic value d of the A/D conversion device 13 in the memory device 21, the H1 surface 41, is connected to an external communication such as a computer, and the power is stored in the A/D stored in the external device. The conversion device "==/, transmitted from a remote remote area to the new second memory device for the second memory device 22, 钤λ丝杜&_value e, can also be passed through The transfer of the stored input conversion device 12 is saved in the new 2:^^ face 2 In 241, it communicates with the outside, and now, S3, the digital protection relay device 10B is shown, and the memory is the same, when the second memory device 22 performs the correction operation, and can be used to protect the relay device 10B. In the operation, when the first hair fails, the device is replaced with the normal device 21 in the new first memory device 21, and is not set to 21°. However, the characteristic value d. The A/D conversion device 13 is not saved. Therefore, if the first memory slot 21 is via the communication interface 41, it can be combined with 26

丨JI 24144pif = two == device 21, in order to make the middle, the special transport of the A/D converter 13 stored in the new first memory device 21 嶋 嶋 嶋In the first memory device 21. In the first memory device 2, which is protected by an external device such as the second power f, and the correction field field conversion device for the error of the analog wheel portion of the new device 13 to be replaced, the replacement operation is performed. . ',, ' can be quickly and efficiently stored and protected (4) "(4) to remember, f set 22 to replace with the new second memory device 22, the characteristic value of the input conversion device 12 by the second = backup And the value of the second value is transmitted to the replaced new second memory device 22 in a simple and easy manner. [Simplified description of the drawings] The block is not shown in the first embodiment of the protective relay device of the present invention, and 2 is a figure! A configuration diagram of the input conversion device included in the protection relay device. Fig. 3 is a block diagram showing the configuration of an a/d conversion device provided in the protective relay device of Fig. 1. It can be seen that the input relay device of the protection relay device of Fig. 1 has an input conversion and I:. . A diagram showing the connection relationship with the ferrier of the A/D converter. 27 1332737 24144pif FIG. 5 is a view showing a connection relationship between a transformer of an input conversion device included in the protection relay device of FIG. 1 and a filter of an A/D conversion device. Fig. 6 is a view for explaining a multiplexer input to an A/D conversion device provided in the protective relay device of Fig. 1; Fig. 7 is a view for explaining an input relationship when "A/D conversion device; eigenvalue calculation mode" in the protection relay device of Fig. 1; Fig. 8 is a flow chart showing the calculation processing of the characteristic values of the A/D conversion device provided in the protective relay device of Fig. 1. Fig. 9 is a view for explaining an input relationship when the "input conversion device characteristic value calculation mode" in the protection relay device of Fig. 1 is explained. Fig. 10 is a flowchart showing a calculation process of characteristic values of an input conversion device provided in the protective relay device of Fig. 1; Fig. 11 is a block diagram showing a second embodiment of the protective relay device of the present invention. Fig. 12 is a block diagram showing a third embodiment of the protective relay device of the present invention. φ [Description of main component symbols] 10, 10A, 10B: protection relay device 12: input conversion device 13: A/D conversion device 14: arithmetic device 15: first eigenvalue calculation device 16: second eigenvalue calculation device 17 : Correction value calculation device 28 1332737 24144pif 18 : Correction device 19 : Protection relay operation device 21 : First memory device • 22: Second memory device 24 : Digital input device - 25 : Interrupter. 27 : Transformer 28 : Converter # 29 : Resistor 31 : Filter 32 : Multiplexer 33 : A/D converter 35 : Cable 36 : Switch 40 : Third memory device 41 : Communication interface φ S1 to S13 : Step a . System power fb: analog power c: digital power d: eigenvalue h: correction value i: A/D conversion value 29

Claims (1)

1332737 24144pif X. Patent application scope: 1, 1 - Protection relay device, sampling the system power of the power system for A/D conversion, using the A/D conversion value for protection relay calculation, the above protection The relay device is characterized in that: the input conversion device 'converts the power level of the system power; the A/D conversion device converts the analog power from the input conversion device into a digital power; ^ the first characteristic value counting device, Calculating the characteristic value of the A/D conversion device; 'the eigenvalue second special value calculation cleavage' calculates the characteristic of the input conversion cleavage, and the 1 memory device is stored by the J-th eigenvalue calculation device The characteristic value of the above-mentioned A/D conversion device is different; the eigenvalue of the above-mentioned input conversion device that is stored by the second eigenvalue calculation means is stored; A/D ίίΪ The correction value is obtained based on the feature value of the input conversion feature stored in the first memory device and the input conversion device stored in the second memory device; Correction value to correct the above A/D conversion value; = 増 corrected 2. For example, the protection relay device, wherein the protection relay device, the 24144pif replacement device, the above A/D conversion farm, and the above 1 and below. ~ Clothing, set to be independent and can be self-protected relay device unloading, 3 spoons such as towel, please refer to Patent Specification No. 1 or Item 2 of the protection relay 襄 1 3 § 忆 忆 device 'The third The memory device copies and stores at least - 詈 of the feature value of the 鸠 conversion device/the stored 鸠 conversion device and the feature value of the second input input conversion device, and the spoon 1 applies: Patent 1 has the first item Or in the protection relay device according to item 2, wherein: the first memory value and the characteristic value of the second characteristic value + μ device are input to the special wheel according to the above The conversion correction correction value calculation device is included. Value and calculate the correction value