CN1237025A - Bus relay protector - Google Patents

Bus relay protector Download PDF

Info

Publication number
CN1237025A
CN1237025A CN99107715A CN99107715A CN1237025A CN 1237025 A CN1237025 A CN 1237025A CN 99107715 A CN99107715 A CN 99107715A CN 99107715 A CN99107715 A CN 99107715A CN 1237025 A CN1237025 A CN 1237025A
Authority
CN
China
Prior art keywords
mentioned
actuating quantity
actuating
fault
sampled data
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN99107715A
Other languages
Chinese (zh)
Other versions
CN1097333C (en
Inventor
堀政夫
须贺纪善
稻村国康
冈崎正人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Publication of CN1237025A publication Critical patent/CN1237025A/en
Application granted granted Critical
Publication of CN1097333C publication Critical patent/CN1097333C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/083—Venting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/34—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The present invention discloses a bus protection relaying device comprises a calculating means which judges internal and external faults in a region containing a plurality of protection areas; an amount-of-operation judging means which judges that the individual protection areas where a fault occurred; a fault detecting means which detects any occurrence of a fault; a faulty bus determining means which judges an occurrence of a fault from the result of judgment by the amount-of-operation judging means and the result of detection by the fault detecting means and produces output; and an interrupted bus judging means which transmits interruption output to areas where a fault has occurred, reduces the parting-relaying protector with CT saturation countermeasures, and makes the structure simply.

Description

Bus relay protector
The present invention relates to the protective relaying device of electric power system.
In the past, when a plurality of protection zone of the bus of protecting electric power system, the overall relay protector with the saturated countermeasure of CT was set respectively, the zone that comprises a plurality of protection zones was carried out the fault verification of inside, outside; With the relay protector of cutting apart with the saturated countermeasure of CT; each protection zone is carried out inside, external fault judgement respectively; the bus that breaks down is judged in the combination of the output by these two kinds of relays from a plurality of protection zones, and sends the output of opening circuit to the bus-bar system that breaks down.
But for above bus relay protector, when protection had the bus of a plurality of protection zones, the bus relay protector that need have the saturated countermeasure of CT more than 2 caused the overall structure of device to complicate thus, made cost increase, and reliability reduces.
The objective of the invention is to: for addressing the above problem, provide a kind of bus relay protector, when fault verification is carried out in a plurality of protection zones; by the computing of having considered that CT is saturated, reduce and cut apart relay protector, simplified structure; reduce cost, improve reliability.
In order to achieve the above object, the present invention takes following technical scheme:
A kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
The actuating quantity decision maker, utilize according to the regional corresponding resulting actuating quantity of above-mentioned sampled data that comprises above-mentioned a plurality of protection zones within a certain period of time variable quantity and according to the variable quantity of the corresponding resultant actuating quantity of above-mentioned sampled data in above-mentioned single protection zone at certain hour, judgement fault generation area;
Failure detector according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone, detects above-mentioned electric power system and breaks down; With
The fault bus decision maker according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector, sends the output of opening circuit to above-mentioned fault generation area.
A kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The actuating quantity decision maker, calculate according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone, among the variable quantity of the actuating quantity of this single protection zone of calculating and the actuating quantity variable quantity within a certain period of time that obtains by above-mentioned arithmetic unit, use a certain side or both sides' variable quantity to judge the fault generation area;
Failure detector, according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone, the fault that detects above-mentioned electric power system takes place;
The 1st decision maker according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector, judges that the fault of above-mentioned fault generation area takes place, and output has prolonged the result of determination of the fault generation area of certain hour; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned moving calculation device, sends the output of opening circuit to the fault generation area.
Described bus relay protector is characterized in that:
The actuating quantity decision maker is calculated according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone; when the variable quantity of the actuating quantity of these single protection zones of calculating, greater than according to the value of the regional corresponding resulting actuating quantity of above-mentioned sampled data that comprises above-mentioned a plurality of protection zones after the variable quantity of certain hour multiply by certain coefficient the time, the single protection zone that judgement obtains big variable quantity is the fault generation area.
Described bus relay protector; it is characterized in that; above-mentioned actuating quantity decision maker; when from 2 protection zones, judging the fault generation area; calculate according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned 2 single protection zones; the variable quantity of an actuating quantity in the variable quantity of 2 actuating quantities of calculating; when multiply by the value of certain coefficient with the regional corresponding resulting actuating quantity of the above-mentioned sampled data variable quantity within a certain period of time that comprises above-mentioned 2 protection zones greater than basis; and when also big, judge that the single protection zone that obtains big variable quantity is the fault generation area than the variable quantity of another actuating quantity.
Described bus relay protector; it is characterized in that; above-mentioned actuating quantity decision maker; when from 2 protection zones, judging the fault generation area; calculate basis and 2 the resulting actuating quantity of above-mentioned sampled data variable quantities within a certain period of time that single protection zone is corresponding; when the variable quantity of an actuating quantity in the variable quantity of these 2 actuating quantities of calculating during, judge that the single protection zone that obtains big variable quantity is the fault generation area greater than the variable quantity of another actuating quantity.
Described bus relay protector; it is characterized in that; above-mentioned actuating quantity decision maker is when judging the fault generation area from 2 protection zones; obtain according to the above-mentioned sampled data resulting actuating quantity corresponding with 2 single protection zones and according to the corresponding resulting actuating quantity of above-mentioned sampled data in the zone that comprises above-mentioned 2 protection zones between phase difference; when the angle of this phase difference less than regulation; and when during greater than predefined Sensitirity va1ue, judging that the single protection zone that these 2 conditions are set up is the fault generation area according to the resulting actuating quantity of the above-mentioned sampled data variable quantity within a certain period of time corresponding with above-mentioned 2 single protection zones.
Described bus relay protector; it is characterized in that; above-mentioned actuating quantity decision maker is when judging the fault generation area from 2 protection zones; obtain according to the above-mentioned sampled data resulting actuating quantity corresponding with 2 single protection zones and according to the corresponding resulting actuating quantity of above-mentioned sampled data in the zone that comprises above-mentioned 2 protection zones between phase difference; when the angle of this phase difference less than regulation; and when according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned 2 single protection zones greater than according to and when comprising within a certain period of time variable quantity of the corresponding resulting actuating quantity of above-mentioned sampled data in the zone of 2 protection zones, judge that the single protection zone of these 2 conditions establishments is the fault generation area.
A kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The data computation device, above-mentioned sampled data is decomposed into positive wave and negative wave after, calculate the positive actuating quantity and the negative actuating quantity in the zone that comprises above-mentioned a plurality of protection zones by the computing of regulation;
The 1st decision maker, calculate according to the above-mentioned sampled data corresponding and calculate positive actuating quantity and negative actuating quantity with above-mentioned single protection zone, the value that actuating quantity that these are positive and negative and the positive actuating quantity of being calculated by above-mentioned data computation device and negative actuating quantity multiply by behind certain coefficient is carried out between the positve term and the comparison between the negative term, when the positive and negative actuating quantity corresponding with single protection zone was all big, detecting was to break down in the inside, protection zone that obtains this actuating quantity; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit, sends the output of opening circuit to the fault generation area.
A kind of bus relay protector; in bus relay protector as claimed in claim 8; it is characterized in that; above-mentioned the 1st decision maker is provided with checkout gear; calculate positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with above-mentioned single protection zone; the value that positive actuating quantity of calculating with this actuating quantity and by above-mentioned data computation device and negative actuating quantity multiply by behind certain coefficient is carried out between the positve term and the comparison between the negative term; when just corresponding to single protection zone; when negative actuating quantity is all big; and when the positive actuating quantity corresponding with this single protection zone and negative actuating quantity during all greater than predefined value, detecting is to break down in the inside, protection zone that obtains big actuating quantity.
A kind of bus relay protector is taken a sample every some cycles to the analog quantity of electric power system, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The 1st decision maker, calculate positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with above-mentioned single protection zone, multiply by the value of certain coefficient when any one absolute value of the absolute value of the actuating quantity of this single protection zone of calculating greater than the actuating quantity of calculating by above-mentioned arithmetic unit, and when this condition continued within a certain period of time, detecting was to break down in the inside, single protection zone that obtains the actuating quantity of condition establishment; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit, sends the output of opening circuit to the fault generation area.
In order to address the above problem, bus relay protector of the present invention is taken a sample every some cycles to the analog quantity of electric power system, utilizes this sampled data failure judgement generation area from a plurality of protection zones, is provided with:
The actuating quantity decision maker, utilization by with the regional corresponding resulting actuating quantity of above-mentioned sampled data that comprises above-mentioned a plurality of protection zones within a certain period of time variable quantity and by above-mentioned sampled data resultant actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone, judge the fault generation area; Failure detector according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone, detects the generation of above-mentioned electric power system fault; With the fault bus decision maker,, send the output of opening circuit to above-mentioned fault generation area according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector.
And bus relay protector of the present invention is provided with:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation; The actuating quantity decision maker, calculate above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone, among the variable quantity within a certain period of time of the variable quantity of the actuating quantity of this single protection zone of calculating and the actuating quantity that obtains by above-mentioned arithmetic unit, use a side or both sides' variable quantity to judge the fault generation area; Failure detector detects the fault generation of above-mentioned electric power system according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone; The 1st decision maker judges that according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector the fault of above-mentioned fault generation area takes place, and prolongs the result of determination of certain hour output fault generation area; With the 2nd decision maker,, send the output of opening circuit to the fault generation area according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit.
Therefore; the present invention is by taking above device; current transformer is connected with the bus of a plurality of protection zones with electric power system; to from the analog current signal of current transformer after some cycles is taken a sample and is transformed to numerical data; arithmetic unit is calculated actuating quantity Id and amount of suppression Ir with sampled data, judges inside, the external fault in the zone that comprises a plurality of protection zones by the percentage differential computing of regulation.By known methods this arithmetic unit is applied the saturated countermeasure of current transformer (CT) here.
In addition; the numerical data of the sampled data that the actuating quantity decision maker obtains according to each protection zone; the usage operation amount within a certain period of time variation delta IdA and a side or the both sides among the variation delta Id within a certain period of time of the actuating quantity that obtains by above-mentioned arithmetic unit judge the fault generation area; for example under the situation of using variable quantity
| when the relation of Δ IdA| 〉=K1| Δ Id| (K1 is the coefficient less than 1) is set up, judge that the protection zone that obtains the IdA actuating quantity is the fault generation area.By the state of judging that such condition is set up; Even for the saturated fault of CT, also can fault take place the back to CT till saturated during correctly export result of determination.
On the other hand; failure detector will with full guard zone corresponding simulating current signal or conversion the sampled data variable quantity addition within a certain period of time of numerical data etc.; and with for example the regulation remolding sensitivity compare, detect the generation of the system failure thus.
Thus; fault bus decision maker or the 1st decision maker prolong certain hour with the output of actuating quantity decision maker and the output combination back of failure detector; send the judgement output of fault bus; thereby has a saturated effect of CT; can not need the relay protector of cutting apart in the past, even for also positively sending the output of opening circuit to the fault generation area with the saturated fault of CT with the saturated countermeasure of a plurality of CT.
In addition, the present invention uses a side or both sides' variable quantity in the variable quantity of the variable quantity of the actuating quantity of single protection zone and the actuating quantity that obtained by arithmetic unit.
Have again, bus relay protector of the present invention, be provided with: arithmetic unit, analog quantity to electric power system is taken a sample every some cycles, utilize above-mentioned sampled data to calculate actuating quantity and amount of suppression, judge inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation; The data computation device, above-mentioned sampled data is divided into positive wave and negative wave after, calculate the positive actuating quantity and the negative actuating quantity in the zone that comprises above-mentioned a plurality of protection zones by the computing of regulation; The 1st decision maker, calculate according to the above-mentioned sampled data corresponding and calculate positive actuating quantity and negative actuating quantity with above-mentioned single protection zone, the value that actuating quantity that these are positive and negative and the positive actuating quantity of being calculated by above-mentioned data computation device and negative actuating quantity multiply by behind certain coefficient is carried out between the positve term and the comparison between the negative term, when the positive and negative actuating quantity corresponding with single protection zone is all big, detects the inside, protection zone that obtains this actuating quantity and break down; With the 2nd decision maker,, send the output of opening circuit to the fault generation area according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit.
The present invention is by taking said apparatus; the data computation device is divided into the positive actuating quantity Idp and the negative actuating quantity Idn in the zone that comprises a plurality of protection zones from sampled data; or after being divided into positive actuating quantity IdAp and negative actuating quantity Idn according to the sampled data corresponding, carry out following comparison between the actuating quantity that aligns by the 1st decision maker and between the negative actuating quantity with single protection zone.
| IdAp| 〉=K2|Idp| (K2 is the coefficient of regulation)
| IdAn| 〉=K2|Idn| (K2 is the coefficient of regulation)
When above-mentioned relation is set up, judge to break down in the single protection zone of the actuating quantity with IdAp, IdAn.This condition is only set up when break down in the inside of single protection zone, and for not setting up simultaneously with 2 conditions in the saturated external fault of CT, thereby the effect of the saturated countermeasure of performance CT.Thus; the open circuit judgement of bus of the fault bus result of determination of the effect that can access the saturated countermeasure of CT that adds operation result by above-mentioned arithmetic unit; the bus relay protector with the saturated countermeasure of CT more than many can be set, only realize that with 1 bus relay protector that has the saturated countermeasure of CT protection has the bus relay protector with the saturated countermeasure of CT of the bus of a plurality of protection zones.
The present invention is provided with: arithmetic unit, and utilize above-mentioned sampled data to calculate actuating quantity and amount of suppression, judge inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation; The 1st decision maker, calculate positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with above-mentioned single protection zone, the absolute value of the actuating quantity that any one in the absolute value of the actuating quantity of this single protection zone of calculating calculated greater than above-mentioned arithmetic unit multiply by the value of certain coefficient, and when this condition continued within a certain period of time, judgement detected the inside, single protection zone of the actuating quantity with the condition of making establishment and breaks down; With the 2nd decision maker,, send the output of opening circuit to the fault generation area according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit.
By taking above-mentioned device; the 1st decision maker is calculated positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with single protection zone; value after any one of the absolute value of the actuating quantity of this single protection zone of calculating multiply by certain coefficient greater than the actuating quantity of being calculated by above-mentioned arithmetic unit; and this condition is when certain hour continues; judgement has the inside, single protection zone of the actuating quantity of the condition of making establishment and breaks down; error can be removed thus, fault bus can be correctly judged with the saturated actuating quantity of CT.
Effect of the present invention according to the above description is; utilize and regional corresponding resulting actuating quantity of sampled data that comprises a plurality of protection zones and the sampled data resulting actuating quantity corresponding with single protection zone; even for also differentiating the fault generation area with the saturated fault of CT; thereby can cut down the relay protector of cutting apart with the saturated countermeasure of CT; can reduce cost with simple structure thus, improve reliability.
Following with reference to the description of drawings embodiments of the invention.
Fig. 1 is the functional structure chart of an embodiment of bus relay protector of the present invention.
Fig. 2 is a structure illustration with bus of a plurality of protection zones.
Fig. 3 is the bus-bar system figure of many bus structures of standard.
The schematic diagram of the actuating quantity that Fig. 4 calculates for CT secondary current when bus B1 shown in Figure 3 breaks down with to each bus.
Fig. 5 is the illustration of bus with the data arrangement of decision table that open circuit shown in Figure 1.
Fig. 6 is the functional structure chart of another embodiment of bus relay protector of the present invention.
Fig. 7 is the functional structure chart of another embodiment of bus relay protector of the present invention.
Fig. 8 is the illustration of bus with the data arrangement of decision table that open circuit shown in Figure 7.
Below be specific embodiments of the invention.
Fig. 1 is the functional block diagram of an embodiment of bus relay protector of the present invention.
In the figure, the bus relay protector 10 of electric power system comprises: data acquisition device 11 to taking a sample every some cycles from the analog current signal of the current transformer that links to each other with the bus that a plurality of protection zones are arranged, and is transformed to numerical data; Overall protection arithmetic unit 12 utilizes the numerical data by these data acquisition device 11 conversion, calculates actuating quantity (vector and), amount of suppression (scalar sum), judges the intra-zone that comprises a plurality of protection zones, outside fault by the percentage differential computing of regulation; Actuating quantity decision maker 13, calculate the variable quantity of the actuating quantity in the certain hour according to the numerical data corresponding with each protection zone, the variable quantity of the single protection zone of calculating is compared with the actuating quantity variable quantity of being obtained by above-mentioned overall protection arithmetic unit 12 within a certain period of time, judge that changing the big single protection zone of quantitative change is the fault generation area; Failure detector 14 is according to the generation by the variable quantity detection failure within a certain period of time of the numerical data of above-mentioned data acquisition device 11 conversion or analog current signal; The fault bus decision maker, this fault bus makes up the result of determination that prolongs certain hour output fault bus with the result of determination of above-mentioned actuating quantity decision maker 13 and the detection output of above-mentioned failure detector 14; The bus decision table 16 that opens circuit, the storage bus decision data that opens circuit; With the bus decision maker 17 that opens circuit, according to the inside of overall protection arithmetic unit 12 or outsidely judge that the fault bus of output and above-mentioned fault bus decision maker 15 judges output, reference is opened circuit bus with the open circuit judgement of bus of decision data.
Fig. 2 is the example with bus structure of a plurality of protection zones.
The bus protection zone of power transmission line 18 is divided into the a-quadrant of bus BA side and the B zone of bus BB side, and this bus BA and bus BB are by circuit breaker COB separately.Bus BA, the BB that is connected with power transmission line 18 changes by cutting off switch LSA, LSB.
Below the work of device with said structure is described.
At first, data acquisition device 11 is taken into the electric current of the current transformer of n the circuit that is connected with the bus with a plurality of protection zones every some cycles, is transformed to numerical data successively, gives overall protection arithmetic unit 12.This arithmetic unit 12 will be transformed to numerical data from the analog current of the current transformer of n circuit, utilize these numerical datas, use following formula to calculate actuating quantity Id and amount of suppression Ir.
Id=i1+i2+……+in ……(1)
Ir=|i1|+|i2|+……+|in| ……(2)
Use the above-mentioned amount of calculating Id, the Ir that obtains then, for example when the relation of | Id|-K0|Id| 〉=0 (coefficient of K0 for each protection target is set) is set up, the output action signal.For example send the internal fault output of bus.In addition, totally protect arithmetic unit 12 to be made as and considered the saturated countermeasure computing of known CT.
On the other hand, actuating quantity decision maker 13 has adopted for example cut-out switch of each circuit (LSA, LSB) condition for the single protection zone of identification from a plurality of protection zones.The identification of being carried out the protection zone by cut-out switch condition is technique known, omits its explanation at this.
About discerning single protection zone, the actuating quantity that produces when fault being described (operating current) with reference to Fig. 2 by this actuating quantity decision maker 13.
When the inside of bus shown in Figure 2, when for example break down in the a-quadrant, at the actuating quantity Id of the region generating that comprises 2 zones, with the actuating quantity IdA that produces in the protection zone of breaking down in 2 protection zones of bus inside be same amount.
Therefore, actuating quantity decision maker 13 is for the actuating quantity Id that is calculated by overall protection arithmetic unit 12, and 2 the actuating quantity IdA or the IdB that calculate with each protection zone respectively compare, if when between the two
| IdA| 〉=K1|Id| ... (3) relation is set up, and judges that then the a-quadrant breaks down.K1 in above-mentioned (3) formula is the coefficient less than 1.
But with the saturated fault of CT the time, because the influence of the error current of saturated generation, the judgement of above-mentioned (3) formula might cause the misoperation of device.
Therefore; actuating quantity decision maker 13 carries out the moment judgement according to the variable quantity of actuating quantity; as the saturated countermeasure of CT; calculate each protection zone at certain hour; for example 1/12 cycle (30 about degree) during in the absolute value of variable quantity of actuating quantity | Δ IdA|; | Δ IdB|; absolute value with the variable quantity in this certain hour of calculating | Δ IdA|; | Δ IdB|; absolute value with the variable quantity of the actuating quantity within a certain period of time of calculating by overall protection arithmetic unit 12 | the amount that Δ IdA| multiply by after certain COEFFICIENT K 1 (K1 for less than 1 coefficient) compares; when relation of plane is set up instantly, break down in the judgement a-quadrant.
|ΔIdA|≥K1·|ΔId| ……(4)
Fig. 3 and Fig. 4 are the figure of the judgement effect of explanation above-mentioned (4) formula.
Fig. 3 is the protection system figure of a plurality of buses of standard, by bus A1, bus B1, divides the circuit breaker CBT1 that opens to constitute bus A1, B1.Bus A1 is connected with power transmission line L01, L02 by circuit breaker CB11, CB12.CTT1, CT11, CT12 are current transformer.
On the other hand, Fig. 4 is the figure of the CT secondary current of explanation bus B1 when breaking down and the actuating quantity that each bus is calculated (current phasor and).Here, actuating quantity Id, Fig. 4 (e) that secondary current It, Fig. 4 (d) expression of the CTT1 of secondary current Ip2, Fig. 4 (c) presentation graphs 3 of the CT12 of secondary current Ip1, Fig. 4 (b) presentation graphs 3 of the CT11 of Fig. 4 (a) presentation graphs 3 comprises the zone of two bus A1, B1 represent that actuating quantity IdA, the Fig. 4 (f) in the zone of bus A1 represent the actuating quantity IdB in bus B1 zone, and it is saturated to suppose that current transformer CTT1 has reached CT.
Saturated along with this current transformer CTT1 is that the actuating quantity IdA of the bus A1 that should not produce actuating quantity of normal bus increases in saturated beginning back, and the actuating quantity IdB of fault bus B1 minimizing.Therefore, shown in above-mentioned (3) formula, the computing length in 1/2 cycle if desired may cause misoperation according to the judgement of absolute amplitude value.But, when judging with the variable quantity of above-mentioned (4) formula, if fault begin to CT till saturated during in computing, then can compare judgement by saturated preceding regular event amount, can export and not be subjected to the saturated result of determination that influences of CT.
On the other hand, in failure detector 14, will be from the analog current of all current transformers that are connected with bus, or conversion the absolute value addition of variation delta I within a certain period of time of numerical data, the summation of these variable quantity absolute values and the Sensitirity va1ue IK1 of regulation are compared, as following relational expression, when the summation of variable quantity absolute value during greater than specified sensitivity value IK1, the system of detecting breaks down.
∑|ΔI|≥IK1 ……(5)
Carry out acts of determination processing and fault detect processing with above-mentioned actuating quantity decision maker 13 and failure detector 14, its result is delivered to fault bus decision maker 15.
When this fault bus decision maker 15 receives fault detection signal from failure detector 14, affirmation is from the result of determination of actuating quantity decision maker 13 outputs, for example judge that the zone that conditions such as above-mentioned (3) formula, (4) formula are set up is a fault bus, being false regional is normal bus, and keeps the judgement output of certain hour.
Its result, the bus decision maker 17 that opens circuit is judged output according to the inside of overall protection arithmetic unit 12, the fault bus that external fault is judged output and fault bus decision maker 15, sends the output of opening circuit to the fault generation area.For example when overall protection arithmetic unit 12 output internal faults judgements; when fault bus is declared the fault verification of device 15 output a-quadrants; the reference bus that opens circuit shown in Figure 5 is judged the bus decision data that opens circuit with table 16, and the circuit that is connected with the bus BA of a-quadrant is carried out fault verification and sends the output of opening circuit.
Therefore; according to the foregoing description; actuating quantity decision maker 13; utilization obtains the actuating quantity variation delta IdA within a certain period of time that the numerical data of sampled data obtains according to single protection zone; variation delta Id within a certain period of time with the actuating quantity that obtains from arithmetic unit 12; for example when the relation of | Δ IdA| 〉=K1| Δ Id| (K1 is the coefficient less than 1) is set up; judge that the protection zone that obtains actuating quantity IdA is the fault generation area; therefore even for the saturated fault of CT; after taking place, fault, can correctly export the result of judgement to reaching CT between the period of saturation.And; fault bus decision maker 15 is made up the output of actuating quantity decision maker 13 and the output of failure detector 14; extend time allotments; send the judgement of fault bus; thereby the saturated countermeasure of CT can implement with compute mode, the relay protector of cutting apart of the saturated countermeasure of a plurality of CT of having can be set, even if with the saturated fault of CT as in the past; also can positively judge the fault generation area, and the output break signal.
The following describes other embodiment of protective relaying device of the present invention.
Present embodiment has identical structure with Fig. 1, thus identical to the explanation of each construction unit with above-mentioned explanation to Fig. 1, below only the determination processing of the actuating quantity decision maker 13 of different piece is illustrated.
This protective relaying device is an object of protection with 2 protection zones; as this actuating quantity decision maker 13; respectively 2 protection zones are calculated the variable quantity within a certain period of time of actuating quantity separately; in the variable quantity of these 2 actuating quantities that calculate; there is a variable quantity to multiply by value behind certain coefficient greater than the variable quantity within a certain period of time of the actuating quantity that obtains by overall protection arithmetic unit 12 computings; and during greater than another variable quantity, judge that the zone with big variable quantity is fault generation area and output.
That is, when actuating quantity decision maker 13 is set up when the condition of above-mentioned (4) formula, the absolute value of a variable quantity | the absolute value of Δ IdA| and another variable quantity | Δ IdB| compares, when
| Δ IdA| 〉=| Δ IdB| ... when (6) condition is set up, judge that the regional A of the variable quantity with Δ IdA actuating quantity is the fault generation area.
In addition, the condition criterion formula also can be judged the fault zone shown in 13 usefulness of actuating quantity decision maker above-mentioned (6) formula.
The following describes another embodiment of protective relaying device of the present invention.
Present embodiment has identical structure with Fig. 1, thus identical to the explanation of each construction unit with above-mentioned explanation to Fig. 1, below only the determination processing of the actuating quantity decision maker 13 of different piece is illustrated.
This protective relaying device is an object of protection with 2 protection zones; the actuating quantity Id that this actuating quantity decision maker 13 will totally protect arithmetic unit 12 to calculate carries out bit comparison mutually with actuating quantity IdA, IdB that each protection zone is calculated respectively; when the two phase difference less than the regulation phase angle θ; and the variation delta IdA of actuating quantity within a certain period of time greater than the regulation Sensitirity va1ue IK2 (IK2 is predefined Sensitirity va1ue) time, for example
| the phase difference of Id and IdA |≤θ ... (7)
| Δ IdA 〉=IK2 ... when (8) these 2 conditions were set up, judgement had the protection zone of IdA, Δ IdA actuating quantity and breaks down.
In addition, the actuating quantity that Fig. 4 represents when being fault, the actuating quantity IdB of the bus B1 of fault generation area and comprise the actuating quantity Id of A1, two buses of B1, begin from fault to CT till saturated during be same waveform.Because during before generation CT is saturated; do not produce phase difference between the actuating quantity (vector) of actuating quantity of fault generation area (vector) and overall protection arithmetic unit 12; so after can judging that fault takes place with the condition criterion formula of above-mentioned (7) formula; phase difference between the actuating quantity that calculate the actuating quantity of being calculated by overall protection arithmetic unit 12 and each protection zone is less than the phase angle θ of regulation, even thereby to also correctly judging fault bus with the saturated fault of CT.On the other hand, above-mentioned (8) formula is to compare to determine in order to carry out phase place, is used for condition criterion formula that the standard of variable quantity that bottom line must actuating quantity is confirmed.
The following describes another embodiment of protective relaying device of the present invention.
Present embodiment has identical structure with Fig. 1, thus identical to the explanation of each construction unit with above-mentioned explanation to Fig. 1, below only the determination processing of the actuating quantity decision maker 13 of different piece is illustrated.
This protective relaying device is an object of protection with 2 protection zones also; this actuating quantity decision maker 13 will totally be protected actuating quantity Id that arithmetic unit 12 calculates and the actuating quantity IdA that each protection zone is calculated respectively; IdB carries out the phase bit comparison; when the two phase difference less than the regulation phase angle θ for example 30 the degree; and when the actuating quantity variable quantity within a certain period of time that each protection zone is calculated respectively multiply by value behind certain coefficient greater than the actuating quantity variable quantity within a certain period of time of being calculated by overall protection arithmetic unit 12; when for example above-mentioned (7) formula and (4) formula are set up simultaneously, can judge to have IdA; the protection zone of Δ IdA actuating quantity is the fault generation area.
In this device, when the phase difference of actuating quantity IdA, IdB less than the phase angle θ of regulation for example 30 when spending, owing to judge according to the relational expression of (4) formula, (7) formula reaching CT, even, also can correctly judge fault bus therefore for the saturated fault of CT.
Fig. 6 is the functional block diagram of another embodiment of protective relaying device of the present invention.
This protective relaying device 20 is by data acquisition device 21, totally protect arithmetic unit 22, overall positive and negative data computation device 23, fault bus decision maker 24, the storage bus that opens circuit to judge that open circuit bus decision table 25 and the bus decision maker 26 that opens circuit with data constitute.Wherein, overall positive and negative data computation device 23 will comprise the actuating quantity in zone of a plurality of protection zones by the positive and negative separate computations; 24 pairs of a plurality of protection zones of fault bus decision maker are calculated each positive actuating quantity and negative actuating quantity respectively; actuating quantity that these are positive and negative and the actuating quantity of being calculated by above-mentioned overall positive negative data calculating apparatus compare, and judge the zone of breaking down.
In addition; data acquisition device 21, totally protect the arithmetic unit 22 and the bus decision maker 26 that opens circuit with data acquisition device 11 shown in Figure 1, totally protect the arithmetic unit 12 and the bus decision maker 17 that opens circuit to have identical structure, so omit its detailed description at this.
Below the work of above-mentioned protective relaying device is described.
When data acquisition device 21 is taken into current signal every some cycles from the current transformer that is connected with the bus with a plurality of protection zones; be transformed to numerical data and when exporting; overall protection arithmetic unit 22 is used to calculate actuating quantity, amount of suppression from the numerical data of data acquisition device 21, judges inside, external fault and the output in the zone that comprises a plurality of protection zones by the percentage differential computing of regulation.
On the other hand; negative data calculating apparatus 23 will be decomposed into positive wave and negative wave by the numerical data of data acquisition device 21 conversion; actuating quantity for the protection zone that comprises a plurality of protection zones; computing by regulation; for example; with the sampled data addition of 1 cycle (between 360 degree), with positive actuating quantity | Idp| and negative actuating quantity | Idn| calculates respectively, gives fault bus decision maker 24.
Fault bus decision maker 24 is for the numerical data from above-mentioned data acquisition device 21 outputs; be taken into the cut-out switch condition of known in the past for example each circuit; discern single protection zone; and calculate for example positive actuating quantity in 2 zones of A and B of a plurality of protection zones | IdAp|; | IdBp| and negative actuating quantity | IdAn|; | IdBn|; with these actuating quantities of calculating and the actuating quantity of calculating by overall positive negative data calculating apparatus 23 | Idp|; | the value that Idn| multiply by behind certain coefficient is carried out comparing respectively between the positve term and between the negative term; when just calculating than each protection zone; when the absolute value of negative actuating quantity is all big, for example
|IdAp|≥K2·|Idp| ……(9)
| IdAn| 〉=K2|Idn| ... when relation (10) is set up simultaneously, detect and have | IdAp|, | fault has taken place in the protection zone of IdAn| actuating quantity.K2 is the constant less than 1.On the other hand, when
|IdBp|≥K2·|Idp| ……(11)
| IdBn| 〉=K2|Idn| ... when relation (12) is set up simultaneously, detect and have | IdBp|, | fault has taken place in the protection zone of the actuating quantity of IdBn|.K2 is the constant less than 1.
Actuating quantity during here from fault shown in Figure 4 illustrates the judgement effect of this protective relaying device 20.
Usually, the break down actuating quantity of bus B of bus exists positive wave and negative wave (with reference to Fig. 4 (f)).In contrast, only there is positive wave (with reference to Fig. 4 (e)) in the actuating quantity of the bus A of normal bus.This is because along with the error (error current that normal bus one side produces) of the actuating quantity of the saturated generation of CT only produces under a kind of situation in positive wave or the negative wave.This phenomenon is to cause because the CT saturated phenomenon mainly is the institute that departs from of the magnetic flux that produced by the flip-flop of electric current.Thereby can be by above-mentioned (9) formula～(12) formula actuating quantity during from fault correctly judge the protection zone of breaking down.
Therefore; according to the foregoing description; can be with the absolute value of the absolute value of positive actuating quantity that a plurality of protection zones are calculated respectively and negative actuating quantity; and the positive actuating quantity and the negative actuating quantity that comprise the zone of a plurality of protection zones carry out between the positve term and the comparison between the negative term, therefore to also correctly judging fault bus with the saturated fault of CT.
The following describes another embodiment of protective relaying device of the present invention.
Present embodiment has identical structure with Fig. 6, thus identical to the explanation of each construction unit with above-mentioned explanation to Fig. 6, below only the fault bus decision maker 24 of different piece is illustrated.
This fault bus decision maker 24 is except the decision condition of above-mentioned (9) formula and (10) formula, when the actuating quantity absolute value of the positive wave that each protection zone is calculated respectively | the actuating quantity absolute value of IdAp| and negative wave | and IdAn| is during greater than the Sensitirity va1ue of regulation, promptly
|IdAp|≥IK3 ……(13)
| IdAn| 〉=IK3 ... when relation (14) is set up simultaneously, detect have IdAp, fault taken place in the protection zone of IdAn actuating quantity.IK3 is the Sensitirity va1ue of regulation.Above-mentioned (13) formula and (14) formula are to judge and condition criterion formula to being used for the standard that bottom line must actuating quantity is confirmed for the absolute value by the actuating quantity of calculating compares.
Fig. 7 is the functional block diagram of another embodiment of bus relay protector of the present invention.
This protective relaying device 30 is by data acquisition device 31, totally protect arithmetic unit 32, fault bus decision maker 33, output to confirm that device 34, the storage bus that opens circuit shown in Figure 8 judge that open circuit bus decision table 35 and the bus decision maker 36 that opens circuit with data constitute.Wherein, fault bus decision maker 33 is calculated each actuating quantity to a plurality of protection zones respectively, and these actuating quantities and the actuating quantity of being calculated by above-mentioned overall protection arithmetic unit are compared, and judges the protection zone of breaking down; Output confirms whether the output of device 34 failure judgement bus decision makers 33 continues same result of determination in the certain hour of each protection zone; The result of determination that the bus decision maker 36 of opening circuit is confirmed device 34 according to inside and outside the fault verification output and the output of overall protection arithmetic unit 32 is with reference to the open circuit judgement of bus of the bus decision data that opens circuit of decision table 35.
Data acquisition device 31 and overall protection arithmetic unit 32 are basic identical with the structure of Fig. 1, in the explanation of this omission to structure.
Work to above-mentioned protective relaying device describes below.
When data acquisition device 31 is taken into current signal every some cycles from the current transformer that is connected with the bus with a plurality of protection zones; be transformed to numerical data and when exporting; overall protection arithmetic unit 32 is used to calculate actuating quantity, amount of suppression from the numerical data of data acquisition device 31, judges inside, external fault and the output in the zone that comprises a plurality of protection zones by the percentage differential computing of regulation.
On the other hand; fault bus decision maker 33 is identical with fault bus decision maker shown in Figure 1 15; calculate actuating quantity IdA, the IdB of each protection zone respectively; compare with these actuating quantities of calculating with totally protecting arithmetic unit 32 to calculate actuating quantity Id; judge the fault generation area by above-mentioned (3) formula, but in this case, when taking place with the saturated fault of CT; can not correctly judge the fault generation area, the misoperation of possible generation device.
And in this device, give output with the judgement output of fault bus decision maker 33 and confirm device 34, even for also judging with the saturated fault of CT.
That is, output confirms whether the judgement output of device 34 failure judgement bus decision makers 33 continues for example 4 cycles in the certain hour of each protection zone, has only the result of determination of just exporting fault bus decision maker 33 when lasting.The error of the saturated actuating quantity of this CT reaches maximum after beginning to produce in that CT is saturated, reduces thereafter.The damping time constant of flip-flop that produces the fault current of the saturated reason of this CT changes along with the impedance of system, generally at most only 50ms, (the 50Hz system is 80ms) its most of decay in 4 cycles after fault are set in the fault of system at high impedance.Usually, if after the fault through 4 cycles, because the saturated recovery of CT that is caused by the flip-flop of fault current can confirm whether the judgement of fault bus decision maker 33 correct.
As mentioned above, output is given the bus decision maker 36 that opens circuit after confirming that device 34 is confirmed result of determination.This bus decision maker 36 that opens circuit uses inside and outside fault verification output of overall protection arithmetic unit 32 and the output of exporting the affirmation result who confirms device 34, and bus decision table 35 sends the output of opening circuit according to opening circuit shown in the figure.
Give one example, for example judge internal faults when overall protection arithmetic unit 32, and fault bus decision maker 33 is when being judged to be the fault of a-quadrant, the bus decision maker 36 that opens circuit sends the output of opening circuit to the circuit that is connected with the bus of a-quadrant.
Therefore, according to the foregoing description, output one side at fault bus decision maker 33 is provided with output affirmation device 34, when continuing within a certain period of time, the judgement output of fault bus decision maker 33 sends this judgement output, thereby the error that can not only remove the saturated actuating quantity that brings of CT, and with the saturated fault of CT the time, also can correctly judge the generation area of fault.

Claims (10)

1, a kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
The actuating quantity decision maker, utilize according to the regional corresponding resulting actuating quantity of above-mentioned sampled data that comprises above-mentioned a plurality of protection zones within a certain period of time variable quantity and according to the variable quantity of the corresponding resultant actuating quantity of above-mentioned sampled data in above-mentioned single protection zone at certain hour, judgement fault generation area;
Failure detector according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone, detects above-mentioned electric power system and breaks down; With
The fault bus decision maker according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector, sends the output of opening circuit to above-mentioned fault generation area.
2, a kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The actuating quantity decision maker, calculate according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone, among the variable quantity of the actuating quantity of this single protection zone of calculating and the actuating quantity variable quantity within a certain period of time that obtains by above-mentioned arithmetic unit, use a certain side or both sides' variable quantity to judge the fault generation area;
Failure detector, according to the variable quantity of the above-mentioned sampled data corresponding with above-mentioned protection zone, the fault that detects above-mentioned electric power system takes place:
The 1st decision maker according to the result of determination of above-mentioned actuating quantity decision maker and the testing result of above-mentioned failure detector, judges that the fault of above-mentioned fault generation area takes place, and output has prolonged the result of determination of the fault generation area of certain hour; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned moving calculation device, sends the output of opening circuit to the fault generation area.
3, according to claim 1 or the described bus relay protector of claim 2, it is characterized in that:
The actuating quantity decision maker is calculated according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned single protection zone; when the variable quantity of the actuating quantity of these single protection zones of calculating, greater than according to the value of the regional corresponding resulting actuating quantity of above-mentioned sampled data that comprises above-mentioned a plurality of protection zones after the variable quantity of certain hour multiply by certain coefficient the time, the single protection zone that judgement obtains big variable quantity is the fault generation area.
4; according to claim 1 or the described bus relay protector of claim 2; it is characterized in that; above-mentioned actuating quantity decision maker; when from 2 protection zones, judging the fault generation area; calculate according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned 2 single protection zones; the variable quantity of an actuating quantity in the variable quantity of 2 actuating quantities of calculating; when multiply by the value of certain coefficient with the regional corresponding resulting actuating quantity of the above-mentioned sampled data variable quantity within a certain period of time that comprises above-mentioned 2 protection zones greater than basis; and when also big, judge that the single protection zone that obtains big variable quantity is the fault generation area than the variable quantity of another actuating quantity.
5, bus relay protector according to claim 2; it is characterized in that; above-mentioned actuating quantity decision maker; when from 2 protection zones, judging the fault generation area; calculate basis and 2 the resulting actuating quantity of above-mentioned sampled data variable quantities within a certain period of time that single protection zone is corresponding; when the variable quantity of an actuating quantity in the variable quantity of these 2 actuating quantities of calculating during, judge that the single protection zone that obtains big variable quantity is the fault generation area greater than the variable quantity of another actuating quantity.
6; according to claim 1 or the described bus relay protector of claim 2; it is characterized in that; above-mentioned actuating quantity decision maker is when judging the fault generation area from 2 protection zones; obtain according to the above-mentioned sampled data resulting actuating quantity corresponding with 2 single protection zones and according to the corresponding resulting actuating quantity of above-mentioned sampled data in the zone that comprises above-mentioned 2 protection zones between phase difference; when the angle of this phase difference less than regulation; and when during greater than predefined Sensitirity va1ue, judging that the single protection zone that these 2 conditions are set up is the fault generation area according to the resulting actuating quantity of the above-mentioned sampled data variable quantity within a certain period of time corresponding with above-mentioned 2 single protection zones.
7; according to claim 1 or the described bus relay protector of claim 2; it is characterized in that; above-mentioned actuating quantity decision maker is when judging the fault generation area from 2 protection zones; obtain according to the above-mentioned sampled data resulting actuating quantity corresponding with 2 single protection zones and according to the corresponding resulting actuating quantity of above-mentioned sampled data in the zone that comprises above-mentioned 2 protection zones between phase difference; when the angle of this phase difference less than regulation; and when according to above-mentioned sampled data resulting actuating quantity within a certain period of time the variable quantity corresponding with above-mentioned 2 single protection zones greater than according to and when comprising within a certain period of time variable quantity of the corresponding resulting actuating quantity of above-mentioned sampled data in the zone of 2 protection zones, judge that the single protection zone of these 2 conditions establishments is the fault generation area.
8, a kind of bus relay protector, its analog quantity to electric power system is taken a sample every some cycles, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The data computation device, above-mentioned sampled data is decomposed into positive wave and negative wave after, calculate the positive actuating quantity and the negative actuating quantity in the zone that comprises above-mentioned a plurality of protection zones by the computing of regulation;
The 1st decision maker, calculate according to the above-mentioned sampled data corresponding and calculate positive actuating quantity and negative actuating quantity with above-mentioned single protection zone, the value that actuating quantity that these are positive and negative and the positive actuating quantity of being calculated by above-mentioned data computation device and negative actuating quantity multiply by behind certain coefficient is carried out between the positve term and the comparison between the negative term, when the positive and negative actuating quantity corresponding with single protection zone was all big, detecting was to break down in the inside, protection zone that obtains this actuating quantity; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit, sends the output of opening circuit to the fault generation area.
9; a kind of bus relay protector; in bus relay protector as claimed in claim 8; it is characterized in that; above-mentioned the 1st decision maker is provided with checkout gear; calculate positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with above-mentioned single protection zone; the value that positive actuating quantity of calculating with this actuating quantity and by above-mentioned data computation device and negative actuating quantity multiply by behind certain coefficient is carried out between the positve term and the comparison between the negative term; when just corresponding to single protection zone; when negative actuating quantity is all big; and when the positive actuating quantity corresponding with this single protection zone and negative actuating quantity during all greater than predefined value, detecting is to break down in the inside, protection zone that obtains big actuating quantity.
10, a kind of bus relay protector is taken a sample every some cycles to the analog quantity of electric power system, utilizes this sampled data failure judgement generation area from a plurality of protection zones, it is characterized in that comprising:
Arithmetic unit utilizes above-mentioned sampled data to calculate actuating quantity and amount of suppression, judges inside, the external fault in the zone that comprises above-mentioned a plurality of protection zones by the percentage differential computing of regulation;
The 1st decision maker, calculate positive actuating quantity and negative actuating quantity according to the above-mentioned sampled data corresponding with above-mentioned single protection zone, multiply by the value of certain coefficient when any one absolute value of the absolute value of the actuating quantity of this single protection zone of calculating greater than the actuating quantity of calculating by above-mentioned arithmetic unit, and when this condition continued within a certain period of time, detecting was to break down in the inside, single protection zone that obtains the actuating quantity of condition establishment; With
The 2nd decision maker according to the result of determination of the operation result and above-mentioned the 1st decision maker of above-mentioned arithmetic unit, sends the output of opening circuit to the fault generation area.
CN99107715A 1998-05-25 1999-05-25 Bus relay protector Expired - Fee Related CN1097333C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP142919/1998 1998-05-25
JP14291998A JP3792893B2 (en) 1998-05-25 1998-05-25 Busbar protection relay device

Publications (2)

Publication Number Publication Date
CN1237025A true CN1237025A (en) 1999-12-01
CN1097333C CN1097333C (en) 2002-12-25

Family

ID=15326688

Family Applications (1)

Application Number Title Priority Date Filing Date
CN99107715A Expired - Fee Related CN1097333C (en) 1998-05-25 1999-05-25 Bus relay protector

Country Status (3)

Country Link
JP (1) JP3792893B2 (en)
KR (1) KR19990088010A (en)
CN (1) CN1097333C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100380765C (en) * 2003-12-11 2008-04-09 北京四方继保自动化有限公司 Fault discrimination method based on virtual current phase comparison for protecting bus bar system
CN101183786B (en) * 2007-11-16 2010-06-09 国电南瑞科技股份有限公司 Anti-CT saturated sampling value differential protection of predicting CT linear transform area

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102380874B1 (en) * 2015-04-14 2022-03-31 삼성전자주식회사 Malfunction prevention system of bus protective relay
JP7285757B2 (en) * 2019-10-17 2023-06-02 三菱電機株式会社 Protective relay device
CN111929630B (en) * 2020-07-13 2023-05-16 中国南方电网有限责任公司超高压输电公司柳州局 Method and device for detecting saturation of current transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100380765C (en) * 2003-12-11 2008-04-09 北京四方继保自动化有限公司 Fault discrimination method based on virtual current phase comparison for protecting bus bar system
CN101183786B (en) * 2007-11-16 2010-06-09 国电南瑞科技股份有限公司 Anti-CT saturated sampling value differential protection of predicting CT linear transform area

Also Published As

Publication number Publication date
KR19990088010A (en) 1999-12-27
CN1097333C (en) 2002-12-25
JPH11341676A (en) 1999-12-10
JP3792893B2 (en) 2006-07-05

Similar Documents

Publication Publication Date Title
EP2681821B1 (en) Method and system for detecting an arc fault in a power circuit
CN101419267B (en) Electric network fault on-line rapid diagnosis and analysis method
US8680872B2 (en) Identification of false positives in high impedance fault detection
CN1256540A (en) Improved fault protection circuit
KR101350529B1 (en) Partial dischange decision apparatus and method having noise rejection function
CN1097333C (en) Bus relay protector
EP1491977A3 (en) System and method for proactive motor wellness diagnosis based on potential cavitation faults
US20120280717A1 (en) Method For Arc Detection And Devices Thereof
JP2014115276A (en) Systems and methods for discriminating dc arcs and load switching noise
JP2015155889A (en) Improved noise propagation immunity of a multi-string arc fault detection device
CN1090401C (en) System protection relay device
CN1487641A (en) Grounding direction relay system
CN1489253A (en) Direction comparing distance relay apparatus
CN1167176C (en) Relay protection and failure location system for power distribution network
KR101475002B1 (en) An incoming and distributing board based on powerless temperature sensor
CN104866964A (en) Method for processing flying spot data in intelligent transformer station
KR20140113387A (en) Home run arc detection at the photovoltaic string level using multiple current sensors
CN1048829C (en) Method and means for supervision of valve units
CN204188753U (en) A kind of dry reactor office is placed on line monitoring system
CN107144763B (en) Electric wire aging fire early warning method and system
CN103162081A (en) Safe grating
CN115267450A (en) Direct-current arc fault detection method and device
US20040263182A1 (en) Arc detection apparatus utilizing a dynamic processing module
CN107508377A (en) Distribution network Quick overhaul system
CN114755542A (en) Arc fault detection method, device and equipment

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20021225

Termination date: 20150525

EXPY Termination of patent right or utility model