CN1619912A - Electric power back up protection method - Google Patents
Electric power back up protection method Download PDFInfo
- Publication number
- CN1619912A CN1619912A CN 200410100953 CN200410100953A CN1619912A CN 1619912 A CN1619912 A CN 1619912A CN 200410100953 CN200410100953 CN 200410100953 CN 200410100953 A CN200410100953 A CN 200410100953A CN 1619912 A CN1619912 A CN 1619912A
- Authority
- CN
- China
- Prior art keywords
- protection
- logic
- electric power
- backup protection
- output
- 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.)
- Pending
Links
Images
Abstract
This invention refers to relaying protection for power system, specially a method of power backup protection by using communication and logic treatment. The characteristic is that a communication part is increased between measuring part and logic part for protecting information starting, in logic part process logic part is increased for calculating information of subordinate power backup protective information, the cut off time is less than one second. Said invention can be used for generator, transformer, transmission line and electric system.
Description
Technical field
The present invention relates to relay protection of power system, specifically relate to adopt communication and logical process to realize the method for electric power back up protection.
Background technology
Electric power back up protection is indispensable a kind of protection on the various power equipments in electric power system, is divided into by the difference of its implementation: nearly backup protection and backup protection far away; Difference by its fault distinguishing principle is divided into: current mode backup protection and distance (also claiming impedance) type backup protection.The effect of electric power back up protection is when the protection of the main protection tripping of protected element or adjacent elements and switch tripping, moves the excision accident by backup protection, to reach electric power accident is controlled at purpose in the as far as possible little scope.The fault distinguishing of each electric power back up protection is according to determining whether startup at measured electric current of its protected element or resistance value with the result that a numerical value of adjusting compares; and the action of each electric power back up protection outlet tripping operation cooperates according to the stairstepping time response in proper order, to guarantee the selectivity of electric power back up protection.The formation of current power backup protection and operating characteristics are as shown in Figure 1 and Figure 2.Backup protection constitutes by the backup protection 4 of the backup protection 3 of the backup protection 2 of the backup protection 1 of the backup protection 5 of generator G, transmission line L1, transmission line L2, transformer T and transmission line L3 is relatively independent separately, cooperates step by step by stairstepping time-delay time limit of adjusting.As can be seen from Figure 2, the operation time limit t of least significant end backup protection
4The shortest, the operation time limit t of upper level backup protection
5The longest, just long more the closer to the backup protection operation time limit of power supply.
The fault distinguishing of existing electric power back up protection and would trip are to decide according to the fault measuring information of the element of being protected separately and an action delay of adjusting as shown in Figure 3; its operation time limit cooperates by the stairstepping time response; so the operate time of protection the closer to the force device of power unit is long more; caused the fault of close power unit can not very fast excision; do not satisfy the requirement of electric power system to the protection rapidity; increase along with the electric power system capacity; particularly when main protection that force device occurs or switch tripping, this contradiction becomes more outstanding.Also have NETWORK STRUCTURE PRESERVING POWER SYSTEM to enlarge and complicated after; the existing highly sensitive advantage of electric power back up protection goes out not embody; in current electric power back up protection, also taked composite voltage locking technology to improve the sensitivity of backup protection; but effect still can not satisfy the needs of power system development; the situation that backup protection can not the excision accident occurred, caused massive losses to electric power system.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency that exists at prior art; provide a kind of and realize that backup protection excises the fault of institute's protection component fast, sensitive and excise apace adjacent or farther place element power failure improvement the method for electric power back up protection.
Electric power back up protection method of the present invention, be achieved by following technical proposals: the method for electric power back up protection is by the input information of electric power back up protection, measure portion, logical gate, operating part, output information partly constitutes, of the present invention being characterized as: increased a communication part that protection information starts between described measure portion and logical gate newly; And be linked together with the backup protection of electric power communication network with same each element of positive direction in the electric power system, realize that the log-on message of each electric power back up protection sends from bottom to up and receives; Increased processing logic part newly at the logical gate of described existing electric power back up protection to the log-on message of received subordinate's electric power back up protection.
The method of electric power back up protection of the present invention compared with prior art has following advantage: this electric power back up protection is according to starting failure judgment separately, and sends the signal of emergency formula to higher level's protective device, starts the backup protection of upper level element.In case during the element switch tripping that this protection is protected, higher level's protection just can be after the time limit of adjusting, sensitivity is excised electric power accident reliably, plays the effect of reserve far away; After the backup protection of this element starts, simultaneously can in conjunction with the protection action message sent of subordinate's electric power back up protection of receiving carry out science decision.If can not receive the action message of subordinate's protection, then electric power accident occurs on the element that this protection protects, power failure on the element of the protection of excising fast by nearly backup protection accelerated motion principle, at this moment electric power back up protection moves and excises fault by its time limit deferred action circuit breaker that escapes main protection at the corresponding levels of adjusting; If only receive the information of having only the action of next stage electric power back up protection; illustrate that power failure occurs on the adjacent next stage force device; when the switch tripping of adjacent elements; at this moment electric power back up protection is by its time-delay time limit of adjusting and escaping the next stage main protection, the fault of excising adjacent force device fast by backup protection accelerated motion circuit breaker far away.In a word, the designed electric power back up protection of the present invention can make the electric power back up protection of current mode and impedance type realize excising fast whole faults of institute's protection component separately; The fault that again can be sensitiveer and reacts and excise subordinate's force device apace; improve the rapidity and the sensitivity of electric power back up protection; make the time of backup protection excision accident be no more than for 1 second, its selectivity characteristic as shown in Figure 6, to satisfy the requirement of electric power system to the backup protection of each element.The present invention can be widely used on the electrical system that generator, transformer, transmission line and subscriber equipment constituted in the electric power system.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 is the constituted mode schematic diagram of prior art electric power back up protection;
Fig. 2 is a prior art electric power back up protection operation time limit characteristic schematic diagram;
Fig. 3 is a prior art power protection system decision logic schematic diagram;
Wherein: G, generator; T, transformer; L
1,, L
2,, L
3, transmission line; 1,2,3,4,5 is respectively circuit L
1, L
2, L
3Backup protection with T; t
1, t
2, t
3, t
4, t
5It is respectively 1,2,3,4,5 operation time limit; Δ t is the time difference; 11, open circuit tripping operation outlet; 12, be this backup protection definite value enabling signal.
Fig. 4 constitutes schematic flow sheet for electric power back up protection method of the present invention;
Fig. 5 is an electric power back up protection method constituted mode structural representation of the present invention;
Fig. 6 is an electric power back up protection operation time limit characteristic schematic diagram of the present invention;
Fig. 7 is the sensitive principle schematic that starts of electric power back up protection method of the present invention backup protection far away;
Fig. 8 is the nearly backup protection accelerated motion principle schematic of electric power back up protection method of the present invention;
Fig. 9 is the backup protection accelerated motion principle schematic far away of electric power back up protection method of the present invention;
Figure 10 constitutes schematic diagram for electric power back up protection method power transformer backup protection of the present invention.
Wherein: 1, be measure portion; 2, be logical gate; 3, be operating part; 4, be output information; 5, be newly-increased communication part; 6, be newly-increased logical gate; 7, be the power communication net; 8, be collection of letters part; 9, be or logic; 10, be time-delay logic t
111, be the tripping operation outlet of opening circuit; 12, be this backup protection definite value enabling signal; 13, be the element of posting a letter; 14, be NOT logic; 15, be and logic; 16, be time-delay logic t
217, time-delay logic t
318, the operation time limit t that reaches of this backup protection
6
Embodiment
Be further described below in conjunction with the method for drawings and Examples electric power back up protection of the present invention.
As Fig. 4, Fig. 5, shown in Figure 6.The method of electric power back up protection of the present invention is by the input information of electric power back up protection, measure portion 1, logical gate 2, operating part 3, output information part 4 constitutes of the present invention being characterized as: increased a communication part 5 that protection information starts between described measure portion 1 and logical gate 2 newly; And be linked together with the backup protection of electric power communication network 7 with same each element of positive direction in the electric power system, the constituted mode between its protection and the protection is realized the reception of the log-on message transmission from bottom to top of each electric power back up protection as shown in Figure 5; Increased processing logic part 6 newly at described existing electric power back up protection logical gate 2, decided the speed of protection would trip muzzle velocity with this, as shown in Figure 4 the log-on message of received subordinate's electric power back up protection; Its protection operation time limit characteristic as shown in Figure 6.
Described newly-increased communication part 5 constitutes by the collection of letters part 8 that receives subordinate's protection log-on message with to the part 13 of posting a letter that the higher level sends the backup protection log-on message, and described newly-increased communication part 5 inputs are connected with the power communication net 7 of each backup protection log-on message of transmission; Its output is connected with each newly-increased logical gate 6; Described newly-increased logical gate 6 is made of accelerate motion system and backup protection accelerated motion system far away of the sensitive start-up system of backup protection far away, nearly backup protection; newly-increased logical gate 6 inputs are connected with the output of communication part 5; be connected with the output of measure portion 1 simultaneously, its output is connected with operating part 3.As shown in Figure 4.The input of described collection of letters part 8 is connected with power communication net 7, and output is connected with newly-increased logical gate 6; The input of the part of posting a letter 13 is connected with the output of measure portion 1, and output is connected with power communication net 7.
As shown in Figure 7.The sensitive start-up system of described backup protection is made of collection of letters part 8 or logic 9, the logical one 0 of delaying time; Or logic 9 inputs are connected with collection of letters part 8 with this backup protection definite value enabling signal 12; Time-delay logical one 0 input with or logic 9 outputs be connected; Time-delay logical one 0 output is connected with the tripping operation outlet 11 of opening circuit.
The sensitive start-up system of described backup protection far away also is provided with the part 13 of posting a letter from signal to higher level's protection that send after this backup protection definite value enabling signal; This backup protection definite value enabling signal 12 is connected with the input of the part 13 of posting a letter, and the part of posting a letter 13 outputs are connected with power communication net 7.
As shown in Figure 8.Described nearly backup protection accelerated motion system is by collection of letters part 8, NOT logic 14, constitute with logical one 5, time-delay logical one 6; Collection of letters part 8 outputs connect after NOT logic 14 and logical one 5, are connected with this backup protection definite value enabling signal 12 simultaneously with logical one 5 inputs, are connected with the tripping operation outlet 11 of opening circuit through time-delay logical one 6 with the output signal of logical one 5.
The described nearly backup protection system that accelerates motion also is provided with the part 13 of posting a letter from signal to higher level's protection that send after this backup protection definite value actuating signal; This backup protection definite value enabling signal 12 is connected with the input of the part 13 of posting a letter, and the part of posting a letter 13 outputs are connected with power communication net 7.
As shown in Figure 9.Described backup protection far away accelerated motion system is by collection of letters part 8, constitute with logical one 5, time-delay logical one 7; Be connected with collection of letters part 8 with this backup protection definite value enabling signal with the input of logical one 5, be connected with the tripping operation outlet 11 of opening circuit through time-delay logical one 7 with the output of logical one 5.
The described backup protection far away system that accelerates motion also is provided with the part 13 of posting a letter from signal to higher level's protection that send after this backup protection definite value enabling signal; This backup protection definite value enabling signal 12 is connected with the input of the part 13 of posting a letter, and the part of posting a letter 13 outputs are connected with power communication net 7.
Embodiment 1.
Present embodiment is the power transformer backup protection.The backup protection of power transformer generally is configured in mains side, 111 protections as shown in figure 10.For the transformer station of two-stage electric pressure, the next stage protection information that this 111 protection needs to receive is the log-on message of 103,104,105 protections.If during 10KV bus paired running, then the next stage protection information of the required reception of 111 protections also will comprise the log-on message of 109 protections.The next stage protection condition of setting up of being failure to actuate is that 103,104,105 protections do not start simultaneously or 103,104,105,109 protections do not start simultaneously.For the transformer station of three electric pressures then subordinates' protection information of 111 protections also to comprise the log-on message of the protection of 35KV side.When if the operation time limit of transformer 111 protections can satisfy requiring of power system operation, its logical gate only uses the sensitive start-up circuit of backup protection far away as shown in Figure 7.
Present embodiment is the generator backup protection.The backup protection of generator requires sensitivity higher, so the logical gate of generator backup protection use nearly backup protection accelerated motion principle as shown in Figure 8 and backup protection accelerated motion principle two parts far away shown in Figure 9.End member spare headed by the generator G is not provided with the part 13 of posting a letter in its backup protection.
Present embodiment is the transmission line backup protection.As shown in figure 10, it is higher that the backup protection sensitivity of circuit is sent in the power plant, so can be unworthy of sensitive enable logic part at the transmission line head end.But when its transmission line was longer, the logical gate of transmission line backup protection used nearly reserve accelerated motion as shown in Figure 8 to start principle and backup protection accelerated motion principle two parts far away shown in Figure 9.And the backup protection sensitivity of the turnover circuit of electric substation is lower, and the logical gate of transmission line backup protection at this moment uses the sensitive principle that starts of backup protection far away as shown in Figure 7.
Present embodiment also can will increase the progression of subordinate's protection log-on message according to the area requirement of line backup protection.
The backup protection of the tail end line of present embodiment is not provided with collection of letters part 8.
In order to guarantee the reliability of electric power back up protection, the communication power supply of each electric power back up protection should adopt independently AC and DC dual power supply mode, and will join uninterrupted power supply, to guarantee that will protect action message to send to the higher level protects startup backup protection far away.
Claims (9)
1, a kind of method of electric power back up protection, input information, measure portion (1) by electric power back up protection, logical gate (2), operating part (3), output information part (4) constitutes, and it is characterized in that: increased a communication part (5) of transmitting the protection log-on message between described measure portion (1) and logical gate (2) newly; And be linked together with the backup protection of electric power communication network (7) with same each element of positive direction in the electric power system; Increased processing logic part (6) newly at described logical gate (2) to the log-on message of received subordinate's electric power back up protection.
2, the method for electric power back up protection as claimed in claim, it is characterized in that: described newly-increased communication part (5) constitutes by the collection of letters part (8) that receives subordinate's protection log-on message with to the part (13) of posting a letter that the higher level sends the backup protection log-on message, and described newly-increased communication part (5) input is connected with the power communication net (7) of each backup protection log-on message of transmission; Its output is connected with each newly-increased logical gate (6); Described newly-increased logical gate (6) is made of accelerate motion system and backup protection accelerated motion system far away of the sensitive start-up system of backup protection far away, nearly backup protection; newly-increased logical gate (6) input is connected with the output of communication part (5); be connected with the output of measure portion (1) simultaneously, its output is connected with operating part (3).
3, the method for electric power back up protection as claimed in claim 2 is characterized in that: described input of collecting mail part (8) is connected with power communication net (7), and output is connected with newly-increased logical gate (6); The input of the part (13) of posting a letter is connected with the output of measure portion (1), and output is connected with power communication net (7).
4, the method for electric power back up protection as claimed in claim 2 is characterized in that: the sensitive start-up system of described backup protection is made of collect mail part (8) or logic (9), time-delay logic (10); Or logic (9) input is connected with the output of this backup protection definite value enabling signal (12) with the part (8) of collecting mail; Time-delay logic (10) input with or logic (9) output be connected; Time-delay logic (10) output is connected with the tripping operation outlet (11) of opening circuit.
5, as the method for claim 2 or 4 described electric power back up protection, it is characterized in that: the sensitive start-up system of described backup protection far away also is provided with the part (13) of posting a letter from signal to higher level's protection that send after this backup protection definite value enabling signal; This backup protection definite value enabling signal (12) is connected with the input of the part (13) of posting a letter, and the part of posting a letter (13) output is connected with power communication net (7).
6, the method for electric power back up protection as claimed in claim 2 is characterized in that: described nearly backup protection accelerated motion system is by collect mail part (8), NOT logic (14), constitute with logic (15), time-delay logic (16); The part of collecting mail (8) output connects after NOT logic (14) and logic (15); be connected with this backup protection definite value enabling signal (12) simultaneously with logic (15) input, be connected with the tripping operation outlet (11) of opening circuit through time-delay logic (16) with the output signal of logic (15).
7, as the method for claim 2 or 6 described electric power back up protection, it is characterized in that: the described nearly backup protection system that accelerates motion also is provided with the part (13) of posting a letter from signal to higher level's protection that send after this backup protection definite value actuating signal; This backup protection definite value enabling signal (12) is connected with the input of the part (13) of posting a letter, and the part of posting a letter (13) output is connected with power communication net (7).
8, the method for electric power back up protection as claimed in claim 2 is characterized in that: described backup protection far away accelerated motion system is by the part (8) of collecting mail, constitute with logic (15), time-delay logic (17); Be connected with the part (8) of collecting mail with this backup protection definite value enabling signal with the input of logic (15), be connected with the tripping operation outlet (11) of opening circuit through time-delay logic (17) with the output of logic (15).
9, as the method for claim 2 or 8 described electric power back up protection, it is characterized in that: the described backup protection far away system that accelerates motion also is provided with the part (13) of posting a letter from signal to higher level's protection that send after this backup protection definite value enabling signal; This backup protection definite value enabling signal (12) is connected with the input of the part (13) of posting a letter, and the part of posting a letter (13) output is connected with power communication net (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410100953 CN1619912A (en) | 2004-12-10 | 2004-12-10 | Electric power back up protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410100953 CN1619912A (en) | 2004-12-10 | 2004-12-10 | Electric power back up protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1619912A true CN1619912A (en) | 2005-05-25 |
Family
ID=34766725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410100953 Pending CN1619912A (en) | 2004-12-10 | 2004-12-10 | Electric power back up protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1619912A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185298A (en) * | 2011-05-11 | 2011-09-14 | 吴登庆 | Relay protection method for power supply circuit based on communication network |
| CN102832709A (en) * | 2012-08-07 | 2012-12-19 | 邯郸供电公司 | Comprehensive protection management machine of intelligent substation spacer layer |
| CN102882192A (en) * | 2012-06-29 | 2013-01-16 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of electrical substation |
| CN107606821A (en) * | 2016-07-12 | 2018-01-19 | 苏州三星电子有限公司 | Compressor of air conditioner oil return system and its return line jam judging method |
-
2004
- 2004-12-10 CN CN 200410100953 patent/CN1619912A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185298A (en) * | 2011-05-11 | 2011-09-14 | 吴登庆 | Relay protection method for power supply circuit based on communication network |
| CN102185298B (en) * | 2011-05-11 | 2014-03-19 | 吴登庆 | Relay protection method for power supply circuit based on communication network |
| CN102882192A (en) * | 2012-06-29 | 2013-01-16 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of electrical substation |
| CN102882192B (en) * | 2012-06-29 | 2015-04-08 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of an electrical substation |
| CN102832709A (en) * | 2012-08-07 | 2012-12-19 | 邯郸供电公司 | Comprehensive protection management machine of intelligent substation spacer layer |
| CN107606821A (en) * | 2016-07-12 | 2018-01-19 | 苏州三星电子有限公司 | Compressor of air conditioner oil return system and its return line jam judging method |
| CN107606821B (en) * | 2016-07-12 | 2020-01-10 | 苏州三星电子有限公司 | Air conditioner compressor oil return system and oil return pipeline blockage judging method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108988305B (en) | Protection method of direct current power distribution network system | |
| CN106786425A (en) | A kind of coincidence formula failure separation method and system on the spot | |
| CN104599901B (en) | Detection circuit used for contactor | |
| CN104362599A (en) | Method for protecting low-voltage bus of intelligent substation | |
| JP3284589B2 (en) | Transmission line protection method and protection relay device | |
| CN109217270B (en) | DC line sectional type timing limit overcurrent protection method and device | |
| CN104269824A (en) | Fault judgment method and backup protection method for medium-voltage side dead zone in main transformer | |
| CN106505529A (en) | A kind of intelligent substation low-voltage bus bar guard method | |
| CN106329492B (en) | A kind of simple bus bar protecting method based on system topological | |
| CN108365595B (en) | Flexible direct current distribution system Non-unit protection method based on fuzzy mathematics | |
| CN100492801C (en) | Method for implementing electrode isolation of super-high voltage DC system | |
| CN1619912A (en) | Electric power back up protection method | |
| CN206977035U (en) | A kind of device for reducing high voltage electric equipment detonation damage | |
| CN100377464C (en) | Method of eliminating error action of leakage protector lower and circuit at operating state | |
| CN106786404B (en) | Circuit-breaker failure portection equipment under 3/2nds modes of connection of one kind and method | |
| CN101902037B (en) | Distributed single-phase earth fault isolation method in low-current earthed system | |
| CN103779843A (en) | Substation area protection system and substation area protection method based on differential flexible overlapping division | |
| CN103615322A (en) | TRT (Top Gas Pressure Recovery Turbine) unit over-speed control system and TRT unit over-speed control method | |
| CN107666142B (en) | The input strategy of the automatic throw-in equipment of emergency power supply of power distribution network unconditional crank | |
| CN109521332A (en) | Fault handling method, apparatus and system | |
| WO2012136241A1 (en) | Fault handling during circuit breaker maintenance in a double-breaker busbar switchyard | |
| CN110932244B (en) | Relay protection method for no-switching of all-station protection outlet pressure plates of transformer substation | |
| CN111711174B (en) | Relay protection method for multi-stage switching station series connection traction network | |
| CN104767184B (en) | The HVDC transmission line guard method of transition resistance tolerance can be improved | |
| CN107086543B (en) | A kind of arc protection accelerates transformer to press off lock Over Current Protection System and method again |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |