CN1090401C - System protection relay device - Google Patents
System protection relay device Download PDFInfo
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- CN1090401C CN1090401C CN99105674A CN99105674A CN1090401C CN 1090401 C CN1090401 C CN 1090401C CN 99105674 A CN99105674 A CN 99105674A CN 99105674 A CN99105674 A CN 99105674A CN 1090401 C CN1090401 C CN 1090401C
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- actuating quantity
- arithmetic unit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- 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
- H02H3/265—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 responsive to phase angle between voltages or between currents
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
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Abstract
The invention discloses a system protection relay device. Current data from all the current transformers that are connected to a bus with a plurality of protection regions of a power system are sampled at a specific time interval, digital data are obtained through a data acquisition means, the digital data are used for determining the internal/ external fault of a region including a plurality of protective regions according to a ratio differential operation by an operation means for collective protection, the amount of operation being calculated individually for a plurality of protection regions by a fault bus judgment means and the amount of operation which is calculated by an operation means are used for discriminating a protection region where an fault is, occuring, and a broken bus is determined from the determining result of the operation means and that of the fault bus determining means at a breaking bus determining means.
Description
The invention relates to the system protection relay device of electric power system
Current; when a plurality of protection zones of electrical system bus are protected; for the zone that comprises these a plurality of protection zones; need to be provided with respectively the concentrated protection relay that carries out inside, external fault judgement, and a plurality of division protection relays that carry out inside, external fault judgement in each protection zone.By the combination of these outputs, the bus that breaks down in a plurality of protection zones is selected, disconnected.
In the above-mentioned formation, the protection relay more than 2 in being arranged, the bus protection of a plurality of protection zones must be arranged.
Purpose of the present invention is exactly for solving above-mentioned problem, provide a kind of not use the simple formation of division protection with relay, just the system protection relay device that can select, disconnect the bus that breaks down in a plurality of protection zones.
For achieving the above object, the present invention takes following technical scheme:
A kind of system protection relay device, its with the given time interval to after the quantity of electricity of electric system sampling, utilize the data of these samplings, the fault in a plurality of protection zones (interval) is discerned and is judged, it is characterized in that having:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, calculates actuating quantity (operational ton) and amount of suppression, by given percentage differential computing, inside, the external fault of the protection zone that comprises above-mentioned a plurality of protection zone (interval) is distinguished;
The 2nd arithmetic unit; it is when calculating actuating quantity to the single zone of above-mentioned a plurality of protection zones; the actuating quantity absolute value of being calculated in than above-mentioned the 1st arithmetic unit when some in the actuating quantity absolute value of calculating at this multiply by the value of given coefficient when also big, then detects the inside, indivedual protection zone that this condition of sening as an envoy to sets up fault has taken place.
The system protection relay device of being put down in writing is characterized in that having:
The 2nd arithmetic unit; the difference absolute value of the single actuating quantity of calculating in actuating quantity that this device is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also wanted hour, then detects in the inside, protection zone that obtains this difference absolute value fault has taken place.
The system protection relay device of being put down in writing; it is characterized in that having: the 2nd arithmetic unit; between the actuating quantity of calculating in actuating quantity that this device is calculated in the single zone of a plurality of protection zones and above-mentioned the 1st arithmetic unit; condition by (a) and (b) shown in following is set up simultaneously, detects in the inside of this protection zone fault has taken place.
(a), to multiply by the value of given coefficient also big for some ratios of the single protection zone actuating quantity absolute value of calculating actuating quantity absolute value of calculating in the 1st arithmetic unit;
(b), in the actuating quantity calculated of single protection zone, (a) phase difference between the actuating quantity of being calculated in the actuating quantity of the condition protection zone of setting up and the 1st arithmetic unit is also littler than given angle.
The system protection relay device of being put down in writing is characterized in that:
With (a) condition be changed to below shown in (c) condition, that is,
(c), some in the actuating quantity absolute value of calculating of single protection zone; the value that multiply by given coefficient (coefficient less than 1) in the 1st arithmetic unit than the actuating quantity absolute value of being calculated is also big, and it is also little to multiply by the value of given coefficient (coefficient greater than 1) than the actuating quantity absolute value of calculating in the 1st arithmetic unit.
The system protection relay device of being put down in writing is characterized in that:
The actuating quantity absolute value of being calculated in the 1st arithmetic unit is the value shown in following (d), that is,
(d), actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit are the big value in the dynamic sensitivity value of the predefined regulation of judgement.
The system protection relay device of being put down in writing is characterized in that: the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is the value shown in following (e), that is,
(e), for the actuating quantity absolute value of being calculated in the 1st arithmetic unit, add the value of the 1st arithmetic unit for the dynamic sensitivity value of the predefined regulation of judgement.
The system protection relay device of being put down in writing; it is characterized in that having: the 2nd arithmetic unit; the difference absolute value of a certain actuating quantity that calculate individually actuating quantity that this device basis is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also little; and the actuating quantity of calculating individually in the protection zone that this condition is set up; also bigger than the 1st arithmetic unit for the predefined action sensitivity of the judgement value with given coefficient (value below 1) on duty; thus, just can detect this regional inside fault has taken place.
The system protection relay device of being put down in writing is characterized in that:
Between the actuating quantity of being calculated in actuating quantity that calculate in the single zone of a plurality of protection zones and the 1st arithmetic unit, set up simultaneously, can detect in the inside of this protection zone fault has taken place according to (f), (g) condition shown in following, that is,
(f), the protection zone actuating quantity absolute value of calculating individually some, also bigger than actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit for judging the big value with given coefficient gained on duty in the predefined action sensitivity value of operation result;
(g), the absolute value of the difference of some actuating quantitys of calculating individually of the actuating quantity calculated in the 1st arithmetic unit and protection zone, the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in the 1st arithmetic unit is also little.
A kind of system protection relay device, it utilizes these sampled datas after with the given time interval electric power system being taken a sample, and fault detect is carried out in two protection zones (interval) judge, it is characterized in that having:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, and actuating quantity of calculating and amount of suppression by given percentage differential computing, are distinguished inside, the external fault of the protection zone that comprises above-mentioned two protection zones (interval);
The 2nd arithmetic unit; calculate above-mentioned two protection zones other actuating quantity; as of the actuating quantity absolute value of being calculated, the value that multiply by given coefficient than the actuating quantity absolute value of calculating in above-mentioned the 1st arithmetic unit is also wanted hour, can detect in another inside, protection zone and break down.
The system protection relay device of record is characterized in that having:
The 2nd arithmetic unit; this device is when one in the actuating quantity absolute value that calculate individually two protection zones; the value that multiply by the set-point gained than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also big; and the actuating quantity absolute value of in another protection zone, calculating; multiply by the value of set-point when also little than the actuating quantity absolute value of being calculated in the 1st arithmetic unit, fault has taken place in the inside, protection zone that can detect the big side's of the actuating quantity calculated actuating quantity in obtaining than the 1st arithmetic unit.
System protection relay device involved in the present invention, with the given time interval to after the quantity of electricity of electric system sampling, utilize the data of these samplings, the fault in a plurality of protection zones (interval) is discerned and is judged.Have in this system protection relay device:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, calculates actuating quantity and amount of suppression, by given percentage differential computing inside, the external fault of the protection zone that comprises above-mentioned a plurality of protection zone (interval) is distinguished;
The 2nd arithmetic unit; this device is when calculating actuating quantity respectively to above-mentioned a plurality of protection zones; the actuating quantity absolute value of being calculated in than above-mentioned the 1st arithmetic unit when some in the actuating quantity absolute value of calculating at this multiply by the value of given coefficient when also big, then detects the inside, indivedual protection zone that this condition of sening as an envoy to sets up fault has taken place.
System protection relay device involved in the present invention; with the given time interval; current data to the output of the current transformer on the bus with a plurality of protection zones that is connected electric power system is taken a sample; obtain numerical data; adopt this numerical data by the percentage differential computing; inside, external fault to the zone that comprises a plurality of protection zones judge, obtains the judged result of the arithmetic unit that concentrated protection uses.For this reason; calculate the actuating quantity of each protection zone respectively; in the judgement of the arithmetic unit that these actuating quantitys (is representative with IdA) and concentrated protection are used between the employed actuating quantity (Id); given relation; for example | when IdA| 〉=K1|Id| (K1 is given coefficient) sets up; then the resulting judged result of the female judgment means of fault is, judges and in the protection zone that obtains the IdA actuating quantity fault has taken place.With the judged result that adds the fault bus judgment means in the judged result of arithmetic unit,, just can provide the system protection relay device that the system that a plurality of protection zones are arranged is protected at concentrated protection with simple formation by to disconnecting the judgement of bus.
System protection relay device involved in the present invention; has the 2nd arithmetic unit; the difference absolute value of the actuating quantity that calculate respectively actuating quantity that this device is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also wanted hour, then detects in the inside, protection zone that obtains this difference absolute value fault has taken place.
System protection relay device involved in the present invention; has the 2nd arithmetic unit; between the actuating quantity that this device is calculated in the actuating quantity of calculating respectively of a plurality of protection zones and above-mentioned the 1st arithmetic unit, the condition by a, b shown in following becomes Rob Roy to detect in the inside of this protection zone fault has taken place simultaneously.
The value that the actuating quantity absolute value that some ratios of the actuating quantity absolute value that calculate a, single protection zone are calculated in the 1st arithmetic unit multiply by given coefficient is also big.、
In the actuating quantity that calculate b, single protection zone, the phase difference between the actuating quantity of being calculated in the actuating quantity of the protection zone that a condition is set up and the 1st arithmetic unit is also littler than given angle.
System protection relay device involved in the present invention, will a condition be changed in claim 3 below shown in the c condition.
Some in the actuating quantity absolute value that c calculates single protection zone; it is also big to multiply by given coefficient (coefficient less than 1) than the actuating quantity absolute value of being calculated in the 1st arithmetic unit, and it is also little to multiply by given coefficient (coefficient more than 1) than the actuating quantity absolute value of calculating in the 1st arithmetic unit.
System protection relay device involved in the present invention, the actuating quantity absolute value of in the 1st arithmetic unit, being calculated be below the value shown in the d.
D, the actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit be the big value in the predefined given Sensitirity va1ue for judgement.
System protection relay device involved in the present invention, the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is the value shown in the following e.
E is for the actuating quantity absolute value of being calculated in the 1st arithmetic unit, add the value of the 1st arithmetic unit for the predefined given action sensitivity value of judgement.
System protection relay device involved in the present invention; the difference absolute value of a certain actuating quantity that calculate individually actuating quantity absolute value that this device basis is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also little; and the actuating quantity of calculating individually in the protection zone that this condition is set up;, just can detect this regional inside fault has taken place for also big this situation of the predefined action sensitivity of the judgement value with given coefficient (value below 1) on duty than the 1st arithmetic unit.
System protection relay device involved in the present invention; between the actuating quantity of being calculated in actuating quantity that calculate in the single zone of a plurality of protection zones and the 1st arithmetic unit; set up simultaneously according to f, g condition shown in following, can detect in the inside of this protection zone fault has taken place.
The actuating quantity absolute value that calculate individually f, protection zone some is also bigger for judging the big value with given coefficient on duty in the predefined action sensitivity value of operation result than actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit.
The absolute value of the difference of some actuating quantitys that calculate individually actuating quantity of being calculated in g, the 1st arithmetic unit and protection zone, the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in the 1st arithmetic unit is also little.
System protection relay device involved in the present invention, this system protection relay device utilize these sampled datas after with the given time interval electric power system being taken a sample, and fault detect is carried out in two protection zones (interval) judge.Have in this system protection relay device:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, and actuating quantity of calculating and amount of suppression are distinguished inside, the external fault of the protection zone that comprises above-mentioned two protection zones (interval) by given percentage differential computing;
The 2nd arithmetic unit; calculate each regional actuating quantity of above-mentioned two protection zones; as of the actuating quantity absolute value of being calculated; the value that multiply by given coefficient than the actuating quantity absolute value of calculating in above-mentioned the 1st arithmetic unit is also wanted hour, can detect in another inside, protection zone fault has taken place.
System protection relay device involved in the present invention; has the 2nd arithmetic unit; this device is when one in the actuating quantity absolute value that calculate individually two protection zones; the value that multiply by set-point than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also big; and the actuating quantity absolute value of in another protection zone, calculating; multiply by the value of specified value when also little than the actuating quantity absolute value of being calculated in the 1st arithmetic unit, fault has taken place in the inside, protection zone that can detect the actuating quantity of the big end of the actuating quantity calculated in obtaining than the 1st arithmetic unit.
Good effect of the present invention:
Just as described above; can provide a kind of system protection relay device according to the present invention; this device is carrying out inside to the zone that comprises a plurality of protection zones; the concentrated protection that external fault is judged is with in the relay; increased the failure system arbitration functions; the actuating quantity that calculate in the actuating quantity that this function is calculated in adopting judgement and the single zone of above-mentioned a plurality of protection zones; just can judge the protection zone of breaking down; therefore not use division protection, just can select the bus that breaks down in a plurality of protection zones with the so simple formation of relay; disconnect.
These and other purposes of the present invention, advantage and feature will be in conjunction with the drawings to being further specified of embodiments of the invention, in these accompanying drawings in description:
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Fig. 1 is the functional-block diagram of expression system protection relay device embodiment of the present invention.
Fig. 2 is the pie graph of the bus (bus bar) of a plurality of protection zones.
Fig. 3 is the protection system figure for the invention embodiment of the invention.
Fig. 4 is the characteristic schematic diagram of expression the 1st embodiment.
Fig. 5 is the characteristic schematic diagram of expression the 2nd embodiment.
Fig. 6 is the characteristic schematic diagram of expression the 3rd embodiment.
Fig. 7 is the characteristic schematic diagram of expression the 4th embodiment.
Embodiments of the invention are described with reference to the accompanying drawings.
Fig. 1 is the functional-block diagram of the expression embodiment of the invention.In Fig. 1, bus protective relay device 10 is by forming with lower device: data acquisition device 11, and the electric current that this device was exported the current transformer on the bus that is connected a plurality of protection zones with the given time interval is taken a sample, and obtains numerical data; Concentrated protection adopts above-mentioned numerical data with arithmetic unit 12, this device, by given ratio action computing, the intra-zone, the external fault that comprise a plurality of protection zones is judged; Fault bus judgment means 13, this device is calculated actuating quantity to the single zone of above-mentioned a plurality of protection zones, the actuating quantity (operational ton) that adopts the actuating quantity calculate and calculate in arithmetic unit at concentrated protection, failure judgement bus; Disconnect bus judgment means 14, this device is judged output by concentrated protection with the inside of arithmetic unit 12, the fault bus that external fault is judged output and fault bus judgment means 13, obtains disconnecting bus and judges output.
Use in the arithmetic unit 12 at concentrated protection; employing comprises the electric current of current transformer output of the n bar circuit that bus connected in the zone of above-mentioned a plurality of protection zones; the amount of suppression that the actuating quantity that (1) formula of calculating is represented and (2) formula are represented; when the determined relational expression of these operands is set up, the output action signal.
[formula 1]
Id(＝i1+i2+……+in) ……………… (1)
Ir(＝|i1|+|i2|+……+|in|) …… (2)
In the fault bus judgment means 13 that fault bus is judged.For to identification other zone, above-mentioned a plurality of protection zone, for example introduce the circuit breaker condition of each circuit.By circuit breaker condition identification protecting zone is well-known method, so its explanation is omitted.Fig. 2 forms example by of the bus of a plurality of protection zones.
Across circuit breaker CBO, bus is divided into bus BA and bus BB.The protection zone is distinguished into the a-quadrant of bus BA end and two protection zones, B zone of bus BB end.At this moment, calculate the actuating quantity IdA and the IdB of each protection zone,, fault bus is judged according to given computing by fault bus judgment means 13.
At this, the feature of the actuating quantity (differential current) that takes place about fault is that example describes with the fault current that is flow through on the bus that two protection zones are arranged shown in Fig. 3.In Fig. 3.Across circuit breaker CBO, bus is separated into bus BA and bus BB, and bus BA goes up to connect and send electric wire L1, L3, and bus BB goes up to connect and send electric wire L2, L4.
Send electric wire L1, L2, L3, L4 to be provided with circuit breaker CB1, CB2, CB3, CB4 and current transformer CT1, CT2, CT3, CT4, be provided with current transformer CTA, CTB at the two ends of circuit breaker CBO.When the electric current that is flow through on establishing each CT was i1, i2, i3, i4, iTA, iTB, differential current IdA that concentrated protection is calculated with the single zone of differential current Id that is calculated in the arithmetic unit device 12 and protection zone and idB were shown in (3), (4), (5) formula.
[formula 2]
Id＝i1+i2+i3+i4 ……………… (3)
IdA＝i1+i3+iTA ……………… (4)
IdB＝i2+i4+iTB ……………… (5)
When break down in the inside of bus BA, flow into bus BA through circuit breaker CBO from the electric current that send electric wire L2, L4 to come.If fault current at this moment is IF, the electric current by circuit breaker CBO is IT, and then according to Kirchhoff's law, the relation of (6), (7) formula is set up between each electric current, from these relation arrangement (3), (4), (5) formula, then can obtain (8), (9), (10) formula.
[formula 3]
IT＝iTA＝-iTB＝i2+i4……………… (6)
IF＝i1+i3+iTA ……………… (7)
Id＝IF ……………… (8)
IdA＝IF ……………… (9)
IdB＝0 ……………… (10)
As shown above, when break down in bus inside, comprising the differential current that is taken place in the zone in two zones, is identical amount with the differential current that the protection zone took place that breaks down in two protection zones of bus inside.
Thereby; the actuating quantity Id that is calculated in arithmetic unit 12 at concentrated protection; compare with single two actuating quantitys (IdA or IdB) calculated in protection zone in fault bus judgment means 13 respectively; by confirming given relation establishment between the two, just can failure judgement bus (being which zone in two zones).
Utilize the characteristic schematic diagram that the principle of operation of fault bus judgment means 13 is described below.Fig. 4-characteristic principle polar plot shown in Figure 7 has been represented actuating quantity of being calculated in arithmetic unit 12 at concentrated protection (Id) and the actuating quantity (actuating quantity of fault bus end: the relation IdA) that calculate in the single zone of a plurality of protection zones in fault bus judgment means 13.
The 1st embodiment that Figure 4 shows that.Represented the relatively absolute value of Id, the mode of failure judgement generation area.When break down in the a-quadrant, IdA and Id are same amount on principle.Even this is considered the error part, IdA also is near the Id value, so can think that the absolute value of Id and the absolute value of IdA also are the identical values of cardinal principle.In the explanation in Fig. 4-Fig. 7, the meaning of a-quadrant is " a-quadrant in the represented bus of Fig. 2 ", or " obtaining the protection zone of actuating quantity IdA ".
Utilize this situation,, then can judge in the a-quadrant of calculating actuating quantity IdA fault has taken place if the relation of (11) formula is set up between the absolute value of the absolute value of IdA and Id.And when in the B zone fault having taken place too, if the relation of (12) formula is set up, then can judge in calculating the B zone of actuating quantity IdB fault has taken place.
[formula 4]
|IdA|≥K1·|Id| ………………(11)
(K1 is the coefficient below 1)
|IdB|≥K1·|Id| ………………(12)
(K1 is given coefficient)
Figure 5 shows that the 2nd embodiment, represented in the difference absolute value of calculating IdA and Id | after the IdA-IdB|, compare the mode of failure judgement generation area with the absolute value of Id.When breaking down in the a-quadrant, IdA also is identical value on vector with Id.
Therefore, the difference of IdA and Id is equivalent to error vector, is that big value can not be arranged when breaking down in the a-quadrant.Consider from this situation,, then can judge in the a-quadrant of calculating actuating quantity IdA fault has taken place if the relation of (13) formula is set up between the difference absolute value of IdA and Id and the Id absolute value.
[formula 5]
|IdA-Id|≤K2·|Id| ………………(13)
(K2 is the coefficient below 1)
Figure 6 shows that the 3rd embodiment, is to add the mode that Id and IdA carry out bit comparison mutually in the characteristic principle polar plot of Fig. 4, as mentioned above,, when breaking down, because IdA is identical amount on vector with Id in the a-quadrant, therefore we can say except that scalar that phase place also is identical substantially.Consider from this situation,, then can judge in the a-quadrant of calculating actuating quantity IdA fault has taken place if the relation of (11) formula is set up.
[formula 6]
|Id＾IdA|≤α ……………………(14)
(α is given phase angle)
Figure 7 shows that the 4th embodiment, in (11) formula to the relation of the absolute value of the expression absolute value of Id and IdA, further on the IdA absolute value, added the condition of giving the upper limit.When in the a-quadrant, breaking down, because IdA is identical substantially value with Id, so the absolute value of IdA can not substantially exceed the absolute value of Id, consider from this situation, between the absolute value of the absolute value of IdA and Id, (15) relation of formula is set up, and (14) then can be judged in the a-quadrant of calculating actuating quantity IdA fault has taken place when setting up.
[formula 7]
K1·|Id|≤|IdA|≤K3·|Id| ……………(15)
(K1 is the coefficient below 1, and K3 is the coefficient more than 1)
Herein, the absolute value of actuating quantity when fault takes place, at least also should than concentrated protection with in the arithmetic unit by carry out inside, the external fault predefined Sensitirity va1ue of judgement (KTAP) is big.Therefore, we can say that also the absolute value of IdA when breaking down in the a-quadrant is bigger than this Sensitirity va1ue.
From this situation, in the relational expression between the absolute value of IdA and Id (11), the lower limit of actuating quantity is considered this Sensitirity va1ue (KTAP), according to (16) formula, just often can prevent the transitional misoperation that the little fault initial stage of actuating quantity produces.In addition, the condition of (16) formula is except as setting with the AND condition of (14) formula, can the failure judgement bus outside, also can be combined as (17) formula failure judgement bus with (15) formula.
[formula 8]
|IdA|≥K1·max{|Id|、KTAP} ………………(16)
Max (A, B) the big value among expression A, the B.
K1·(max{|Id|、KTAP}≤|IdA|≤K3·|Id|
…………………………………(17)
(K1 is the coefficient below 1, and K3 is the coefficient more than 1)
Equally, be adopted as the Sensitirity va1ue of setting the actuating quantity lower limit, the mode of (18) formula also is effective.In order to prevent the error detection in little galvanic areas, the lower limit of actuating quantity IdA is set at Sensitirity va1ue (KTAP) and multiply by given coefficient, obtains the method for (19) formula.Because (19) formula of being somebody's turn to do is by setting with (13) formula AND, so can the failure judgement bus.In addition, in above-mentioned judgment mode since with (13) formula and (16) formula as the AND condition enactment, so can judge to fault bus more accurately.
[formula 9]
|IdA|≥K1·(|Id|+KTAP) ……………………(18)
|IdA|≥K4·KTAP ……………………………(19)
(K4 is the coefficient below 1)
Consider below the protection zone only is defined as two situation.When break down in the a-quadrant among two protection zone A, the B, as mentioned above, the actuating quantity of a-quadrant is that the actuating quantity Id of the arithmetic unit used with concentrated protection is same amount, and at this moment (the just margin of error) do not take place the actuating quantity IdB in B zone.
Like this, in the a-quadrant, detect the condition that fault has taken place and to consider that (20) formula is set up a thing between the absolute value of IdB and the Id absolute value.But, only judge in the a-quadrant, when all do not break down in the B zone, in order to judge that fault has taken place just must be added in the condition in certain zone fault having taken place in the opposing party zone by (20) formula.
Added the condition of (11) formula of the absolute value of the absolute value that adopts a-quadrant actuating quantity IdA and Id as this condition, when condition is set up simultaneously with (20) formula, judged and fault has taken place in the a-quadrant.Equally, the condition that breaks down in the B zone all becomes Rob Roy to judge to have (21) formula with (22) formula two conditions.[formula 10]
|IdB|≤K5·|Id| ……………………(20)
(K5 is the coefficient below 1)
|IdA|≤K5·|Id| ……………………(21)
|IdB|≤K1·|Id| ……………………(22)
Disconnecting bus judgment means 14 is that concentrated protection is judged that with inside, the external fault of arithmetic unit 12 judged result of output and fault bus judgment means 13 makes up, and disconnects the judgement of bus.For example, the arithmetic unit of using when concentrated protection judges as carrying out internal fault, and the fault bus judgment means is during as the fault judgement of output a-quadrant, to the circuit starting of the bus that is connected the a-quadrant output of opening circuit.The 1st table that the basis for estimation of disconnection bus judgment means gathers carries out, and so just can carry out the starting of opening circuit of fault generation area (fault bus connection line).
In the explanation of the foregoing description, be that example is carried out, but do not limit therewith with the bus-bar system.As long as system has the formation that is suitable for a plurality of protection zones that the differential operational principle protects, just can obtain same result.
[table 1]
The 1st table
| Concentrated protection is exported with arithmetic unit | The output of fault bus judgment means | Disconnect the output of bus judgment means |
| Internal fault | The a-quadrant | A-bus disconnects starting |
| Internal fault | The B zone | The B bus disconnects starting |
| Internal fault | A, B zone | A, B bus disconnect starting |
| Internal fault | Do not have | There is not the starting of disconnection |
| External fault | The a-quadrant | There is not the starting of disconnection |
| External fault | The B zone | There is not the starting of disconnection |
| External fault | A, B zone | There is not the starting of disconnection |
| External fault | Do not have | There is not the starting of disconnection |
Claims (10)
1, a kind of system protection relay device, it utilizes the data of these samplings after with the current sampling of the given time interval to electric power system, and the fault in a plurality of protection zones (interval) is discerned and judged, it is characterized in that having:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, calculates actuating quantity and amount of suppression, by given percentage differential computing, inside, the external fault of the protection zone that comprises above-mentioned a plurality of protection zone (interval) is distinguished;
The 2nd arithmetic unit; it is when calculating actuating quantity to the single zone of above-mentioned a plurality of protection zones; the actuating quantity absolute value of being calculated in than above-mentioned the 1st arithmetic unit when some in the actuating quantity absolute value of calculating at this multiply by the value of given coefficient when also big, then detects the inside, indivedual protection zone that this condition of sening as an envoy to sets up fault has taken place.
2, the system protection relay device of putting down in writing as claim 1 is characterized in that having:
The 2nd arithmetic unit; the difference absolute value of the single actuating quantity of calculating in actuating quantity that this device is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also wanted hour, then detects in the inside, protection zone that obtains this difference absolute value fault has taken place.
3, the system protection relay device of putting down in writing as claim 1; it is characterized in that having: the 2nd arithmetic unit; between the actuating quantity of calculating in actuating quantity that this device is calculated in the single zone of a plurality of protection zones and above-mentioned the 1st arithmetic unit; condition by (a) and (b) shown in following is set up simultaneously, detects in the inside of this protection zone fault has taken place.
(a), to multiply by the value of given coefficient also big for some ratios of the single protection zone actuating quantity absolute value of calculating actuating quantity absolute value of calculating in the 1st arithmetic unit;
(b), in the actuating quantity calculated of single protection zone, (a) phase difference between the actuating quantity of being calculated in the actuating quantity of the condition protection zone of setting up and the 1st arithmetic unit is also littler than given angle.
4, the system protection relay device of putting down in writing as claim 3 is characterized in that:
With (a) condition be changed to below shown in (c) condition, that is,
(c), some in the actuating quantity absolute value of calculating of single protection zone; the value that multiply by given coefficient (coefficient less than 1) in the 1st arithmetic unit than the actuating quantity absolute value of being calculated is also big, and it is also little to multiply by the value of given coefficient (coefficient greater than 1) than the actuating quantity absolute value of calculating in the 1st arithmetic unit.
5, as claim 1 or 3 or 4 system protection relay devices of being put down in writing, it is characterized in that:
The actuating quantity absolute value of being calculated in the 1st arithmetic unit is the value shown in following (d), that is,
(d), actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit are the big value in the dynamic sensitivity value of the predefined regulation of judgement.
6, as claim 1 or 3 or 4 system protection relay devices of being put down in writing, it is characterized in that:
The actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is the value shown in following (e), that is,
(e), for the actuating quantity absolute value of being calculated in the 1st arithmetic unit, add the value of the 1st arithmetic unit for the dynamic sensitivity value of the predefined regulation of judgement.
7; the system protection relay device of putting down in writing as claim 2; it is characterized in that having: the 2nd arithmetic unit; the difference absolute value of a certain actuating quantity that calculate individually actuating quantity that this device basis is calculated in the 1st arithmetic unit and protection zone; the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also little; and the actuating quantity of calculating individually in the protection zone that this condition is set up; also bigger than the 1st arithmetic unit for the predefined action sensitivity of the judgement value with given coefficient (value below 1) on duty; thus, just can detect this regional inside fault has taken place.
8, the system protection relay device of putting down in writing as claim 1 is characterized in that:
Between the actuating quantity of being calculated in actuating quantity that calculate in the single zone of a plurality of protection zones and the 1st arithmetic unit, set up simultaneously, can detect in the inside of this protection zone fault has taken place according to (f), (g) condition shown in following, that is,
(f), the protection zone actuating quantity absolute value of calculating individually some, also bigger than actuating quantity absolute value of being calculated in the 1st arithmetic unit and the 1st arithmetic unit for judging the big value with given coefficient gained on duty in the predefined action sensitivity value of operation result;
(g), the absolute value of the difference of some actuating quantitys of calculating individually of the actuating quantity calculated in the 1st arithmetic unit and protection zone, the value that multiply by given coefficient than the actuating quantity absolute value of being calculated in the 1st arithmetic unit is also little.
9, a kind of system protection relay device, it utilizes these sampled datas after with the given time interval electric current of electric power system being taken a sample, and fault detect is carried out in two protection zones (interval) judge, it is characterized in that having:
The 1st arithmetic unit, this device utilizes above-mentioned sampled data, and actuating quantity of calculating and amount of suppression by given percentage differential computing, are distinguished inside, the external fault of the protection zone that comprises above-mentioned two protection zones (interval);
The 2nd arithmetic unit; calculate above-mentioned two protection zones other actuating quantity; as of the actuating quantity absolute value of being calculated, the value that multiply by given coefficient than the actuating quantity absolute value of calculating in above-mentioned the 1st arithmetic unit is also wanted hour, can detect in another inside, protection zone and break down.
10, at the system protection relay device of claim 9 record, it is characterized in that having:
The 2nd arithmetic unit; this device is when one in the actuating quantity absolute value that calculate individually two protection zones; the value that multiply by the set-point gained than the actuating quantity absolute value of being calculated in above-mentioned the 1st arithmetic unit is also big; and the actuating quantity absolute value of in another protection zone, calculating; multiply by the value of set-point when also little than the actuating quantity absolute value of being calculated in the 1st arithmetic unit, fault has taken place in the inside, protection zone that can detect the big side's of the actuating quantity calculated actuating quantity in obtaining than the 1st arithmetic unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP126678/98 | 1998-04-21 | ||
| JP12667898A JP3808624B2 (en) | 1998-04-21 | 1998-04-21 | System protection relay device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233099A CN1233099A (en) | 1999-10-27 |
| CN1090401C true CN1090401C (en) | 2002-09-04 |
Family
ID=14941159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99105674A Expired - Fee Related CN1090401C (en) | 1998-04-21 | 1999-04-21 | System protection relay device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3808624B2 (en) |
| KR (1) | KR19990083313A (en) |
| CN (1) | CN1090401C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388580C (en) * | 2004-02-13 | 2008-05-14 | 浙江大学 | Three-phase integrated brake device for preventing multiple-branch voltage transformer differential protection unwanted operation |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100413196B1 (en) * | 1999-12-07 | 2003-12-31 | 한국전력공사 | Switching apparatus for electrical power plant and transforming site |
| US6658360B1 (en) * | 2000-06-09 | 2003-12-02 | Siemens Aktiengesellschaft | Software-controlled evaluation of fault currents for protection and monitoring systems |
| EP1195876B1 (en) * | 2000-10-06 | 2007-04-18 | Kabushiki Kaisha Toshiba | Digital protective relay system |
| CN1682419B (en) * | 2002-07-12 | 2012-12-05 | 库帕技术公司 | Electrical network protection system |
| ATE523938T1 (en) * | 2006-06-29 | 2011-09-15 | Abb Technology Ltd | DISTANCE PROTECTION METHOD AND DISTANCE PROTECTION RELAYS |
| CN101609979B (en) * | 2009-07-24 | 2011-08-31 | 南京南瑞继保电气有限公司 | Object-oriented bus protection setting method |
| JP5951237B2 (en) * | 2011-11-21 | 2016-07-13 | 株式会社東芝 | DC feeder protection relay device |
| EP2859635B1 (en) * | 2012-06-06 | 2019-08-07 | ABB Schweiz AG | Method for identifying fault by current differential protection and device thereof |
| CN103280776B (en) * | 2013-05-20 | 2015-10-28 | 南京国电南自电网自动化有限公司 | A kind of method preventing differential protection incorrect operation |
| EP3350897A4 (en) * | 2015-09-18 | 2019-08-07 | Schweitzer Engineering Laboratories, Inc. | Time-domain line protection of electric power delivery systems |
| CN105119248A (en) * | 2015-10-08 | 2015-12-02 | 南京南瑞继保电气有限公司 | Centralized bus-bar protection extension access capability method and device |
| CN105870887B (en) * | 2016-05-04 | 2018-04-20 | 国电南瑞科技股份有限公司 | A kind of method for identifying bus differential region |
| CN105762772B (en) * | 2016-05-04 | 2018-04-20 | 国电南瑞科技股份有限公司 | A kind of method for identifying bus differential region |
| CN107196275A (en) * | 2017-06-19 | 2017-09-22 | 中国南方电网有限责任公司 | A kind of method for examining bus differential protection secondary circuit with electric transmission in short-term |
| CN109980595B (en) * | 2019-05-07 | 2021-10-08 | 华北电力大学（保定） | Method for determining fault clearing time of flexible direct-current power grid under bipolar short circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0828934B2 (en) * | 1984-07-31 | 1996-03-21 | 株式会社東芝 | Protection control device |
| KR910000118B1 (en) * | 1985-11-07 | 1991-01-21 | 가부시끼가이샤 도시바 | Information data output device for electric power system |
| JP2652184B2 (en) * | 1988-02-01 | 1997-09-10 | 三菱電機株式会社 | Digital protection relay |
| JPH0681417B2 (en) * | 1988-12-16 | 1994-10-12 | 三菱電機株式会社 | Digital bus protection relay |
| JPH0771378B2 (en) * | 1990-02-28 | 1995-07-31 | 三菱電機株式会社 | Failure zone detector |
| JPH0654439A (en) * | 1992-07-30 | 1994-02-25 | Toshiba Corp | Digital type transformer protection relay device |
-
1998
- 1998-04-21 JP JP12667898A patent/JP3808624B2/en not_active Expired - Lifetime
-
1999
- 1999-04-19 KR KR1019990013847A patent/KR19990083313A/en not_active Application Discontinuation
- 1999-04-21 CN CN99105674A patent/CN1090401C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388580C (en) * | 2004-02-13 | 2008-05-14 | 浙江大学 | Three-phase integrated brake device for preventing multiple-branch voltage transformer differential protection unwanted operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233099A (en) | 1999-10-27 |
| JPH11308756A (en) | 1999-11-05 |
| KR19990083313A (en) | 1999-11-25 |
| JP3808624B2 (en) | 2006-08-16 |
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