CN101814729A - Busbar protection identification method for automatically identifying running mode of duplicate busbar device - Google Patents
Busbar protection identification method for automatically identifying running mode of duplicate busbar device Download PDFInfo
- Publication number
- CN101814729A CN101814729A CN 201010154158 CN201010154158A CN101814729A CN 101814729 A CN101814729 A CN 101814729A CN 201010154158 CN201010154158 CN 201010154158 CN 201010154158 A CN201010154158 A CN 201010154158A CN 101814729 A CN101814729 A CN 101814729A
- Authority
- CN
- China
- Prior art keywords
- disconnecting link
- branch road
- female disconnecting
- female
- electric current
- 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
Links
Images
Abstract
A busbar protection identification method for automatically identifying a running mode of a duplicate busbar device comprises the following steps of: reading an input state of a master disconnecting link I and an input state of a master disconnecting link II; respectively detecting whether the master disconnecting link I and the master disconnecting link II are closed or not according to a state of a normally open auxiliary junction of the master disconnecting link I and a state of a normally open auxiliary junction of the master disconnecting link II; identifying the state of the master disconnecting link I as a running state if the master disconnecting link I is closed; identifying the state of the master disconnecting link II as a running state if the master disconnecting link II is closed; detecting whether a branch current is greater than a threshold value or not based on the input state of the master disconnecting link I and a detection result if the master disconnecting link I is disconnected; setting an identifier of abnormal state identification of the master disconnecting link I according to the close state of the master disconnecting link II when the current is greater than the threshold value; detecting whether the branch current is greater than the threshold or not based on the input state of the master disconnecting link II and the detection result if the master disconnecting link II is disconnected; and setting an identifier of abnormal state identification of the master disconnecting link II according to the close state of the master disconnecting link I when the current is greater than the threshold value.
Description
Technical field
The present invention relates to a kind of bus protection recognition methods of automatic identification double-bus equipment operation mode; more particularly; relate to and a kind ofly discern the operational mode that double-bus connects branch road automatically, thereby guarantee the method for bus protection safety and reliability by the microcomputer type protection equipment for busbar.
Background technology
In electrical network, the identification of allotting the equipment operation mode on the high voltage power distribution bus is directly connected to protection equipment for busbar reliability of operation and fail safe.That is to say that protection equipment for busbar is the basic function and the precondition of a key to the correct identification of each branch road operational mode of allotting on the bus.Especially, for double bus scheme system in the electrical network, each Connection Element switches between two buses through being everlasting.Therefore, protection equipment for busbar needs correctly to follow in real time the variation of bus running manner, could guarantee the correct operation of bus protection.
At present; external protection equipment for busbar (as the SEL-487B protective device of the U.S., the protection equipment for busbar of ABB AB) commonly used adopts each pair of the bus disconnecting link of each branch road that bus is connected often to open auxiliary contact and normally closed contact inserts protection equipment for busbar simultaneously, can discern the operational mode of each branch road reliably to guarantee protection equipment for busbar.
Domestic main microcomputer type protection equipment for busbar producer is (as south, Nanjing auspicious relaying protection company; state electricity south is from joint-stock company; south, Shenzhen auspicious protection company; Xuchang relay protection company; four directions electric power protection company etc.) PC bus protection device all adopts a secondary open type auxiliary contact of introducing the bus isolation switch; detection by each branch current detection and open type auxiliary contact; in conjunction with bus differential district current imbalance or current circuit burn out detection and self check warning function; utilize each branch current or CURRENT DISTRIBUTION to come the correctness of verification open type auxiliary contact; send the unusual alarm signal of disconnecting link location recognition; thereby bus running manner is discerned, and the indirect labor forces intervention means to realize bus protection.
Though some protection equipment for busbars can realize revising automatically the operational mode of bus protection to the abnormal conditions of the knife switch secondary contact of single branch road, need move the post personnel and carry out hand-operated forced intervention setting.In addition, unusual to a plurality of knife switch secondary contacts of allotting the branch road while or taking place in succession, protection equipment for busbar can not correctly be discerned the operational mode of bus protection.In this case; the correct operation performance and the security reliability of bus protection will be influenced; may cause the bus protection malfunction or allot the switch tripping of branch road, electric power netting safe running is caused significant impact, and may cause heavy economic losses or social benefit harm.
In addition; some protection equipment for busbars also adopt often opens auxiliary contact with each pair of bus disconnecting link and normally closed auxiliary contact inserts the disconnecting link position identification device simultaneously; give protection equipment for busbar by the disconnecting link position signalling of disconnecting link position identification device after again, can follow the operational mode of each branch road of bus reliably to guarantee protection equipment for busbar with treated identification.
Yet; even if protection equipment for busbar adopts two auxiliary contacts (often opening auxiliary contact and normally closed auxiliary contact) of the verification each other of each bus disconnecting link to realize operational mode identification; but for operation transformer station for many years, each branch road inserts protection equipment for busbar and adopts a pair of its bus disconnecting link often to open the mode of auxiliary contact more.Therefore.When the novel bus protective device is put into operation, insert the loop and increase a large amount of control cable owing to knife switch secondary contact restricted number or new the transformation, both increase improvement expenses and also increased the rebuilding construction amount.Even if the transformer station that newly puts into operation if protection equipment for busbar adopts two auxiliary contact modes of the verification each other of each bus disconnecting link, also can increase corresponding engineering investment cost and construction working amount.
In addition, because most protection equipment for busbars need be provided with the operational mode that bus simulation indicating dial is simulated indication or forced to be provided with each branch road on the bus, equipment investment expense and on-site maintenance work have therefore been increased.
Therefore, at the single auxiliary contact access security reliability problem that protection equipment for busbar brought of field by using bus disconnecting link, need a kind ofly can discern double-bus automatically and connect the operational mode of branch road to carry out the method for bus protection with cheap cost.
Summary of the invention
To be partly articulated other aspect of the present invention and/or advantage in the following description, by describing, it can become clearer, perhaps can understand by implementing the present invention.
According to an aspect of the present invention, provide a kind of bus protection recognition methods of automatic identification double-bus equipment operation mode, may further comprise the steps: (a) read the female disconnecting link of I of branch road and the input state of the female disconnecting link of II; (b), detect the female disconnecting link of I respectively and whether the female disconnecting link of II is closed according to the state of often opening auxiliary contact of often opening auxiliary contact and the female disconnecting link of II of the female disconnecting link of the I of this branch road; (c) if the female disconnecting link closure of the I of this branch road is a running status with the female disconnecting link state recognition of the I of this branch road then; (d) if the female disconnecting link closure of the II of this branch road is a running status with the female disconnecting link state recognition of the II of this branch road then; (e) if the female disconnecting link of the I of this branch road disconnects, the threshold value whether electric current is then arranged greater than operation based on the input state of the female disconnecting link of the I of this branch road and electric current that testing result detects this branch road, and when the electric current of this branch road during, according to the female disconnecting link of the II of this branch road closed unusual sign of the female disconnecting link state recognition of I that is provided with whether greater than this threshold value; (f) if the female disconnecting link of the II of this branch road disconnects, the threshold value whether electric current is then arranged greater than operation based on the input state of the female disconnecting link of the II of this branch road and electric current that testing result detects this branch road, and when the electric current of this branch road during, according to the female disconnecting link of the I of this branch road closed unusual sign of the female disconnecting link state recognition of II that is provided with whether greater than this threshold value.
Description of drawings
By the description of embodiment being carried out below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is the schematic diagram of double-bus configuration system wiring;
Fig. 2 is the connection principle schematic diagram that single branch road inserts protection equipment for busbar in the double-bus configuration system according to the embodiment of the invention;
Fig. 3 illustrates the flow chart of handling according to the identification of the female disconnecting link operational mode of I in the bus bar protecting method of the embodiment of the invention;
Fig. 4 illustrates the flow chart of handling according to the identification of the female disconnecting link operational mode of II in the bus bar protecting method of the embodiment of the invention;
Fig. 5 illustrates the flow chart according to the bus bar protecting method median generatrix disconnecting link state recognition abnormity processing of the embodiment of the invention;
Fig. 6 illustrates the flow chart according to the interconnected processing of the bus bar protecting method median generatrix of the embodiment of the invention.
Embodiment
Now the embodiment of the invention is described in detail, its example shown in the accompanying drawings, wherein, identical label is represented same parts all the time.Below with reference to the accompanying drawings embodiment is described to explain the present invention.
Fig. 1 is the schematic diagram of double-bus configuration system wiring.As shown in Figure 1, two buses, promptly I mother and mother II have a plurality of branch road L1, L2 and L3.Here, the L1 branch road runs on female situation, can use approach well known that this is handled.The present invention does not relate to the processing of female situation, does not do detailed description at this.
Fig. 2 is the connection principle schematic diagram that single branch road inserts protection equipment for busbar in the double-bus configuration system according to the embodiment of the invention.In Fig. 2, be the mode of connection that example illustrates protection equipment for busbar with the L2 branch road among Fig. 1, wherein, the switch number of label 1143 indication L2 branch roads.
The power supply access way of protection equipment for busbar (SEL-487B) at first is described.Determine the power supply voltage level of protection equipment for busbar by the equipment DC control supply specifications parameter of transformer station (or power plant), it is independently of one another that the open type auxiliary contact (as 1G_NO among Fig. 2 and 2G_NO) of bus disconnecting link (as 11431 among Fig. 2 and 11432) inserts opening into the working power of DC power supply and protection equipment for busbar of protection equipment for busbar.Described opening into DC power supply and working power all has the power monitoring function, and alarm signal output is provided when power supply disappears, and handles with prompting post personnel inspection.
In addition, open the antijamming capability and the reliability thereof of entry loop in order to improve protection equipment for busbar, the open type auxiliary contact of disconnecting link open the electric pressure of selecting 110Vdc or 220Vdc into DC power supply, and do not use the electric pressure of 24Vdc or 48Vdc.
With reference to Fig. 2; the electric current of each branch road of bus equipment is gone into the corresponding input terminal I02 of protection equipment for busbar from the termination that this branch current instrument transformer is used for the secondary winding TA3 of bus protection; the other end is received the nonpolar current terminal (not shown) of protection equipment for busbar; the common current terminal that this nonpolar terminal is a ground connection links to each other with the nonpolar terminal of all electric current input circuits.What each pair of two groups of bus disconnecting links on each branch road was often opened auxiliary contact 1G_NO and 2G_NO directly inserts corresponding input terminal IN207 of protective device and IN209 in the idle contact mode.Simultaneously, the other end of often opening auxiliary contact 1G_NO and 2G_NO is connected to the public terminal (not shown) into DC power supply opened of protection equipment for busbar, opens entry loop thereby form disconnecting link.
Label 1G_NC among Fig. 2 and 2G_NC indicate the normally closed auxiliary contact of two groups of bus disconnecting links respectively, and it is only as alternate ways.Do not use normally closed auxiliary contact among the present invention.The IN COM of protection equipment for busbar and open into COM and have identical meanings, promptly all auxiliary contact inlet highway protective devices drive common port into power supply, wherein, IN_COM is the protection equipment for busbar internal number, opening into COM is the external circuit numbering.
Following with reference to the bus bar protecting method of Fig. 3 to Fig. 6 description according to the automatic identification double-bus equipment operation mode of the embodiment of the invention.Fig. 3 illustrates the flow chart of handling according to the identification of the female disconnecting link operational mode of I in the bus bar protecting method of the embodiment of the invention; Fig. 4 illustrates the flow chart of handling according to the identification of the female disconnecting link operational mode of II in the bus bar protecting method of the embodiment of the invention; Fig. 5 illustrates the flow chart according to the bus bar protecting method median generatrix disconnecting link state recognition abnormity processing of the embodiment of the invention, and Fig. 6 illustrates the flow chart according to the interconnected processing of the bus bar protecting method median generatrix of the embodiment of the invention.
With reference to Fig. 3, in step S101, protection equipment for busbar obtains the input state of the female disconnecting link of this branch road I.Specifically, protection equipment for busbar is from being arranged on the input state that wherein register reads the female disconnecting link of I, if the female disconnecting link closure of I, then input state can be 1, if the female disconnecting link of I disconnects, then input state can be 0.Then, in step S102, protection equipment for busbar detects whether closure of I mother disconnecting link in real time according to the state of often opening auxiliary contact of the female disconnecting link of I.Specifically, often open auxiliary contact when closed, can determine that the female disconnecting link of I is in the close position when what protection equipment for busbar recognized the female disconnecting link of I.And when protection equipment for busbar recognizes often opening auxiliary contact and disconnecting of the female disconnecting link of I, can determine that the female disconnecting link of I is in open position.If the female disconnecting link of I is in the close position, can be running status then, and can be used as other input state value of protection equipment for busbar logic that promptly, the female disconnecting link running status of I is set to logical one with the female disconnecting link state recognition of I.Otherwise the female disconnecting link running status of I is set to logical zero.If the female disconnecting link of I is in the close position, then the real-time status of the female disconnecting link of I can be set is 1 to protection equipment for busbar; Otherwise the real-time status that protection equipment for busbar can be provided with the female disconnecting link of I is 0.If the female disconnecting link of I is in open position, then in step S103, whether protection equipment for busbar is changed to open position by make position according to the input state of the female disconnecting link of I and the female disconnecting link of real-time status detection I of the female disconnecting link of I.If it is not to be changed to open position by make position that protection equipment for busbar is determined the female disconnecting link of I, then upgrade the input state of I mother disconnecting link, and method returns step S101 according to the real-time status of the female disconnecting link of I, enter next sense cycle.When detecting the female disconnecting link of I is when changing from the make position to the open position, and in step S104, memory also keeps testing result in short-term.At this moment, testing result can be remained logical one, the retention time is arranged on 20ms-60ms.Thereafter, in step S105, whether the electric current that protection equipment for busbar detects this branch road has the threshold value of electric current greater than operation.This threshold value is relevant with the current detection accuracy and the maximum overcurrent multiple that allows of protection equipment for busbar.Preferably, this threshold value is set to 0.04IN, and wherein IN is the rated secondary current of current transformer, is generally two kinds of specifications of 5A or 1A.Should have the fast detecting function when detection branch disconnection or no current state, the response time of fast detecting electric current, promptly for the 50Hz electrical network, it detected response time less than 20mS less than 1 cycle.
Be not more than operation the threshold value of electric current is arranged if detect the electric current of this branch road in step S105, then protection equipment for busbar upgrades the input state of the female disconnecting link of I according to the real-time status of the female disconnecting link of I, and method returns step S 101, enters next sense cycle.If the electric current of this branch road is greater than this threshold value, then in step S106, protection equipment for busbar judges according to the state of often opening auxiliary contact of the female disconnecting link of II whether the female disconnecting link of II is closed.If the female disconnecting link of II is in closure state, then protection equipment for busbar upgrades the input state of the female disconnecting link of I according to the real-time status of the female disconnecting link of I, and method returns step S101, enters next sense cycle.If II mother disconnecting link is not in closure state, then in step S107, according to the female disconnecting link self-holding circuit of the open I of the female disconnecting link status detection of I result, that is, remembering automatically and keeping the female disconnecting link state of I still is running status.Then, in step S108, the unusual sign of the female disconnecting link state recognition of protection equipment for busbar I is set to logical one, and the female disconnecting link running status of I is set to logical one.Thereafter, handling process enters bus disconnecting link state recognition abnormality processing shown in Figure 5.
Selectively, according to the embodiment of the invention, after the female disconnecting link self-holding circuit of open I in step S107, the threshold value whether electric current that protection equipment for busbar detects this branch road has an electric current greater than operation (that is, 0.04IN).If the electric current of this branch road greater than 0.04IN, then enters step S108.Otherwise whether protection equipment for busbar detects has imported disconnecting link signal return affirmation order.Confirm order if detect the disconnecting link signal return, the then female disconnecting link self-holding circuit of protection equipment for busbar releasing I, and method returns step S101, enters next sense cycle.Confirm order if detect the disconnecting link signal return, whether the electric current that then turns back to above-mentioned this branch road of detection has the step of the threshold value of electric current greater than operation.Specifically: according to the embodiment of the invention, after the female disconnecting link self-holding circuit of open I in step S107, the female disconnecting link of I position input contact state is handled return to closure state after or this loop when stopping using, its running current is lower than described threshold value.At this moment, confirm order if detect the disconnecting link signal return, the then female disconnecting link self-holding circuit of protection equipment for busbar releasing I, and method returns step S101, enters next sense cycle.Do not confirm order if detect the disconnecting link signal return, then the female disconnecting link self-holding circuit of I is open always, confirms order up to detecting the disconnecting link signal return.
During the processing of carrying out as shown in Figure 3, protection equipment for busbar can also be carried out the identification of the female disconnecting link operational mode of II shown in Figure 4 simultaneously and handle.Because this processing is corresponding with processing shown in Figure 3, therefore following simple this processing of describing.
In step S201, protection equipment for busbar obtains the input state of the female disconnecting link of this branch road II.Specifically, protection equipment for busbar is from being arranged on the input state that wherein register reads the female disconnecting link of II.Then, in step S202, protection equipment for busbar detects whether closure of II mother disconnecting link in real time according to the state of often opening auxiliary contact of the female disconnecting link of II.Often open auxiliary contact when closed when what protection equipment for busbar recognized the female disconnecting link of II, can determine that the female disconnecting link of II is in the close position.If the female disconnecting link of II is in the close position, can be running status then, and can be used as other input state value of protection equipment for busbar logic that promptly, the female disconnecting link running status of II is set to logical one with the female disconnecting link state recognition of II.Otherwise the female disconnecting link running status of II is set to logical zero.If the female disconnecting link of II is in open position, then in step S203, whether protection equipment for busbar is changed to open position by make position according to the input state of the female disconnecting link of II and the female disconnecting link of real-time status detection II of the female disconnecting link of II.If it is not to be changed to open position by make position that protection equipment for busbar is determined the female disconnecting link of II, then upgrade the input state of II mother disconnecting link, and method returns step S201 according to the real-time status of the female disconnecting link of II, enter next sense cycle.When detecting the female disconnecting link of II is when changing from the make position to the open position, and in step S204, memory also keeps testing result in short-term.At this moment, testing result can be remained logical one, the retention time is arranged on 20ms-60ms.Thereafter, in step S205, whether the electric current that protection equipment for busbar detects this branch road has the threshold value of electric current greater than operation.Preferably, this threshold value is set to 0.04IN, and wherein IN is the rated secondary current of the secondary winding TA3 of current transformer.
Be not more than operation the threshold value of electric current is arranged if detect the electric current of this branch road in step S205, then protection equipment for busbar upgrades the input state of the female disconnecting link of II according to the real-time status of the female disconnecting link of II, and method returns step S201, enters next sense cycle.If the electric current of this branch road is greater than this threshold value, then in step S206, protection equipment for busbar judges according to the state of often opening auxiliary contact of the female disconnecting link of I whether the female disconnecting link of I is closed.If the female disconnecting link of I is in closure state, then protection equipment for busbar upgrades the input state of the female disconnecting link of II according to the real-time status of the female disconnecting link of II, and method returns step S201, enters next sense cycle.If the female disconnecting link of I is not in closure state, then in step S207, according to the female disconnecting link self-holding circuit of the open II of the female disconnecting link status detection of II result, and the female disconnecting link state of maintenance II still is a running status.Then, in step S208, the unusual sign of the female disconnecting link state recognition of protection equipment for busbar II is set to logical one, and the female disconnecting link running status of II is set to logical one.Thereafter, handling process enters bus disconnecting link state recognition abnormality processing shown in Figure 5.
Similarly, after the female disconnecting link self-holding circuit of open II in step S207, the threshold value whether electric current that protection equipment for busbar detects this branch road has an electric current greater than operation (that is, 0.04IN).If the electric current of this branch road greater than 0.04IN, then enters step S208.Otherwise whether protection equipment for busbar detects has imported disconnecting link signal return affirmation order.Confirm order if detect the disconnecting link signal return, the then female disconnecting link self-holding circuit of protection equipment for busbar releasing II, and method returns step S201, enters next sense cycle.Confirm order if detect the disconnecting link signal return, whether the electric current that then turns back to above-mentioned this branch road of detection has the step of the threshold value of electric current greater than operation.
With reference to Fig. 5; in step S301; protection equipment for busbar is provided with the unusual sign of bus disconnecting link identification according to the female disconnecting link location recognition of each branch road I unusual sign or the unusual sign of the female disconnecting link state recognition of II, that is, the unusual sign of bus disconnecting link identification is set to logical one.In step S302, the unusual warning of protection equipment for busbar output bus disconnecting link state recognition.Then, in step S303, whether this branch road of protection equipment for busbar continuous detecting satisfies the involution condition.Satisfy the involution condition if detect; then in step S304; it is logical zero that protection equipment for busbar is discerned unusual identification recovery with the bus disconnecting link; and female disconnecting link self-holding circuit of releasing I or the female disconnecting link self-holding circuit of II; thereby finish bus disconnecting link state recognition abnormity processing, enter next sense cycle.According to embodiments of the invention, satisfying the involution condition refers to: the unusual knife switch secondary contact input signal of bus disconnecting link location recognition takes place after treatment, when device detects disconnecting link and returns to the running status of original closure again or when detecting this branch road and not reruned electric current, detected the disconnecting link signal return simultaneously and confirmed order.
On the other hand, be provided with in step S301 before the unusual sign of bus disconnecting link identification, protection equipment for busbar can at first read unusual sign of the female disconnecting link location recognition of I and the unusual sign of the female disconnecting link state recognition of II.If what the female disconnecting link location recognition of I was unusual is designated 1, then protection equipment for busbar can be provided with first intermediate variable and represents that bus disconnecting link state recognition abnormity processing is by the female disconnecting link location recognition of I exception-triggered.At this moment, can be set to logical one by first intermediate variable.If what the female disconnecting link location recognition of II was unusual is designated 1, then protection equipment for busbar can be provided with second intermediate variable and represents that bus disconnecting link state recognition abnormity processing is by the female disconnecting link location recognition of II exception-triggered.At this moment, can be set to logical one by second intermediate variable.Like this, protection equipment for busbar can determine clearly bus disconnecting link state recognition abnormity processing by which bar bus identification is caused unusually.
With reference to Fig. 6, in step S401, protection equipment for busbar obtains mother I of each branch road of determining, the running status of the female disconnecting link of II in above-mentioned steps S102, S108 and S202, S208.In step S402, whether female disconnecting link running status of protection equipment for busbar continuous detecting I and the female disconnecting link running status of II are logical one.If female disconnecting link running status of I and the female disconnecting link running status of II all are logical ones, then in step S403, the sign of protection equipment for busbar bus mutual contact mode is set to logical one, and the warning of output bus mutual contact mode.
Selectively, according to the embodiment of the invention, manually enter bus interconnected operation mode if detect, then the sign of protection equipment for busbar bus mutual contact mode is set to logical one, and the warning of output bus mutual contact mode.
Above-mentioned only is exemplary about the description according to the bus bar protecting method of the automatic identification double-bus equipment operation mode of the embodiment of the invention, the invention is not restricted to this.The present invention is equally applicable to self adaptation under the single bus scheme mode and follows the operational mode that connects branch road on the bus.Even when the bus knife switch secondary contact state of each branch road makes a mistake simultaneously on bus, also can satisfy automatic identification and warning, thereby provide assurance for the bus protection correct operation.
As mentioned above; by using bus bar protecting method according to the automatic identification double-bus equipment operation mode of the embodiment of the invention; when the bus knife switch secondary contact generation displacement that connects branch road is unusual; protection equipment for busbar is revised automatically and is judged as the bus running manner of the unusual previous moment of disconnecting link displacement or correctly adapts to operational mode according to the actual motion environmental condition, sends the sign and/or the warning signal of " bus disconnecting link location recognition is unusual " or " bus is interconnected " simultaneously.In addition, adopt after the above-mentioned bus bar protecting method, do not influence the current circuit burn out detection and the alarm function of bus protection.
By using above-mentioned bus bar protecting method; the protection equipment for busbar of electrical network double-bus configuration system can realize discerning reliably and following automatically bus running manner; do not need to move the post personnel and carry out the operational mode that hand-operated forced intervention is provided with branch equipment, do not need to dispose in addition bus simulation indicating dial or bus disconnecting link indicating device yet and indicate the adaptation bus running manner.Therefore, by adopting above-mentioned bus bar protecting method, can save project investment expense and construction maintenance workload.
In above-mentioned bus bar protecting method, opening into power supply of the working power of protection equipment for busbar and knife switch secondary contact is independent separately, and each has power monitoring and warning function.Owing to adopt knife switch secondary contact directly to insert suitable opening, therefore improved interference free performance and the maintainability performance of opening entry loop into DC power supply in the idle contact mode.
Though shown and described the present invention with reference to specific embodiment of the present invention, but those skilled in the art should understand that, under the situation that does not break away from the spirit and scope of the present invention that limit by claim and equivalent thereof, can carry out various changes in form and details.
Claims (9)
1. bus protection recognition methods of identification double-bus equipment operation mode automatically may further comprise the steps:
(a) read the female disconnecting link of I of branch road and the input state of the female disconnecting link of II;
(b), detect the female disconnecting link of I respectively and whether the female disconnecting link of II is closed according to the state of often opening auxiliary contact of often opening auxiliary contact and the female disconnecting link of II of the female disconnecting link of the I of this branch road;
(c) if the female disconnecting link closure of the I of this branch road is a running status with the female disconnecting link state recognition of the I of this branch road then;
(d) if the female disconnecting link closure of the II of this branch road is a running status with the female disconnecting link state recognition of the II of this branch road then;
(e) if the female disconnecting link of the I of this branch road disconnects, the threshold value whether electric current is then arranged greater than operation based on the input state of the female disconnecting link of the I of this branch road and electric current that testing result detects this branch road, and when the electric current of this branch road during, according to the female disconnecting link of the II of this branch road closed unusual sign of the female disconnecting link state recognition of I that is provided with whether greater than this threshold value;
(f) if the female disconnecting link of the II of this branch road disconnects, the threshold value whether electric current is then arranged greater than operation based on the input state of the female disconnecting link of the II of this branch road and electric current that testing result detects this branch road, and when the electric current of this branch road during, according to the female disconnecting link of the I of this branch road closed unusual sign of the female disconnecting link state recognition of II that is provided with whether greater than this threshold value.
2. bus protection recognition methods according to claim 1, wherein, step (e) may further comprise the steps:
(e1), then whether change to open position by make position according to the input state of the female disconnecting link of I of this branch road and the female disconnecting link of I that testing result is judged this branch road if the female disconnecting link of the I of this branch road disconnects;
(e2) when the female disconnecting link of the I that detects this branch road changes from the make position to the open position, memory also keeps testing result in short-term;
(e3) whether the electric current that detects this branch road has the threshold value of electric current greater than operation;
(e4) if the electric current that detects this branch road greater than this threshold value, then judges according to the state of often opening auxiliary contact of the female disconnecting link of the II of this branch road whether the female disconnecting link of II of this branch road is closed;
(e5) if the female disconnecting link of the II of this branch road does not have closure, then open the female disconnecting link self-holding circuit of I of this branch road, the unusual sign of the female disconnecting link state recognition of the I of this branch road is set to logical one, and the female disconnecting link state of the I of this branch road still is identified as running status.
3. bus protection recognition methods according to claim 1, wherein, step (f) may further comprise the steps:
(f1), then whether change to open position by make position according to the input state of the female disconnecting link of II of this branch road and the female disconnecting link of II that testing result is judged this branch road if the female disconnecting link of the II of this branch road disconnects;
(f2) when the female disconnecting link of the II that detects this branch road changes from the make position to the open position, memory also keeps testing result in short-term;
(f3) whether the electric current that detects this branch road has the threshold value of electric current greater than operation;
(f4) if the electric current that detects this branch road greater than this threshold value, then judges according to the state of often opening auxiliary contact of the female disconnecting link of the I of this branch road whether the female disconnecting link of I of this branch road is closed;
(f5) if the female disconnecting link of the I of this branch road does not have closure, then open the female disconnecting link self-holding circuit of II of this branch road, the unusual sign of the female disconnecting link state recognition of the II of this branch road is set to logical one, and the female disconnecting link state of the II of this branch road still is identified as running status.
4. bus protection recognition methods according to claim 2 wherein, after the female disconnecting link self-holding circuit of open I, also comprises the steps: in step (e5)
(h1) whether the electric current that detects this branch road has the threshold value of electric current greater than operation;
(h2) if the electric current that detects this branch road greater than this threshold value, then the unusual sign of the female disconnecting link state recognition of the I of this branch road is set to logical one;
(h3) be not more than this threshold value if detect the electric current of this branch road, then detect and whether imported disconnecting link signal return affirmation order;
(h4) confirm order if detect the disconnecting link signal return, then remove the female disconnecting link self-holding circuit of I, and return step (a);
(h5) if do not detect the order of disconnecting link signal return, then return step (h1).
5. bus protection recognition methods according to claim 3 wherein, after the female disconnecting link self-holding circuit of open II, also comprises the steps: in step (f5)
(i1) whether the electric current that detects this branch road has the threshold value of electric current greater than operation;
(i2) if the electric current that detects this branch road greater than this threshold value, then the unusual sign of the female disconnecting link state recognition of the II of this branch road is set to logical one;
(i3) be not more than this threshold value if detect the electric current of this branch road, then detect and whether imported disconnecting link signal return affirmation order;
(i4) confirm order if detect the disconnecting link signal return, then remove the female disconnecting link self-holding circuit of II, and return step (a);
(i5) if do not detect the order of disconnecting link signal return, then return step (i1).
6. according to any described bus protection recognition methods among the claim 1-5, wherein, it is 0.04IN that described operation has the threshold value of electric current, and IN is the rated secondary current of the current transformer on the branch road.
7. bus protection recognition methods according to claim 1 also comprises:
(j) after the unusual sign of the female disconnecting link location recognition of I or the unusual sign of the female disconnecting link state recognition of II were set to logical one, the unusual sign of bus disconnecting link identification was set to logical one;
(k) the unusual warning of output bus disconnecting link state recognition;
(m) whether this branch road of continuous detecting satisfies the involution condition;
(n) if detect and satisfy the involution condition, then the bus disconnecting link being discerned unusual identification recovery is logical zero, and removes female disconnecting link self-holding circuit of I or the female disconnecting link self-holding circuit of II.
8. bus protection recognition methods according to claim 7; wherein; in step (j); if what the female disconnecting link location recognition of I was unusual is designated 1; then identify corresponding first variable and be set to logical one with this; if what the female disconnecting link location recognition of II was unusual is designated 1, then identifies corresponding second variable and be set to logical one with this.
9. bus protection recognition methods according to claim 1, further comprising the steps of:
(o) if in step (c), the female disconnecting link of I is identified as running status or the female disconnecting link identification of I abnormality in step (e5), and in step (d), the female disconnecting link of II is identified as running status or the female disconnecting link identification of II abnormality in step (f5), then the sign of bus mutual contact mode is set to logical one, and the warning of output bus mutual contact mode;
(p) if detect and manually enter the bus mutual contact mode by force, then the sign of bus mutual contact mode is set to logic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010154158 CN101814729B (en) | 2010-04-23 | 2010-04-23 | Busbar protection identification method for automatically identifying running mode of duplicate busbar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010154158 CN101814729B (en) | 2010-04-23 | 2010-04-23 | Busbar protection identification method for automatically identifying running mode of duplicate busbar device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101814729A true CN101814729A (en) | 2010-08-25 |
| CN101814729B CN101814729B (en) | 2012-06-06 |
Family
ID=42621878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010154158 Expired - Fee Related CN101814729B (en) | 2010-04-23 | 2010-04-23 | Busbar protection identification method for automatically identifying running mode of duplicate busbar device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101814729B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427274A (en) * | 2011-09-29 | 2012-04-25 | 广西电网公司电力调度控制中心 | Method for acquiring real-time states of power grid element |
| CN104237586A (en) * | 2014-08-19 | 2014-12-24 | 千江（上海）信息科技有限公司 | High-precision metering system of double-bus power supply circuit |
| CN106329727A (en) * | 2016-08-30 | 2017-01-11 | 合肥智博电气有限公司 | PT switching mechanism for arc suppression and resonance elimination apparatus |
| CN110047267A (en) * | 2019-04-24 | 2019-07-23 | 广东电网有限责任公司 | A kind of signal blockage method and system |
| CN112436490A (en) * | 2020-12-01 | 2021-03-02 | 北京四方继保自动化股份有限公司 | Multi-bus interconnection self-identification method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243350A (en) * | 1998-07-29 | 2000-02-02 | 许继电气股份有限公司 | Microcomputer automatic identifying method for bus running manner |
| CN101227082A (en) * | 2008-01-09 | 2008-07-23 | 深圳南瑞科技有限公司 | Method for automatically correcting bus knife switch secondary contact |
| CN101630836A (en) * | 2009-08-12 | 2010-01-20 | 国电南京自动化股份有限公司 | Correcting method of running mode of bus protection branch in double-bus connecting wire |
-
2010
- 2010-04-23 CN CN 201010154158 patent/CN101814729B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243350A (en) * | 1998-07-29 | 2000-02-02 | 许继电气股份有限公司 | Microcomputer automatic identifying method for bus running manner |
| CN101227082A (en) * | 2008-01-09 | 2008-07-23 | 深圳南瑞科技有限公司 | Method for automatically correcting bus knife switch secondary contact |
| CN101630836A (en) * | 2009-08-12 | 2010-01-20 | 国电南京自动化股份有限公司 | Correcting method of running mode of bus protection branch in double-bus connecting wire |
Non-Patent Citations (1)
| Title |
|---|
| 《继电器》 20030815 于子重等 微机母线保护运行方式自适应方案分析 51-52 1－9 第31卷, 第8期 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427274A (en) * | 2011-09-29 | 2012-04-25 | 广西电网公司电力调度控制中心 | Method for acquiring real-time states of power grid element |
| CN102427274B (en) * | 2011-09-29 | 2013-07-24 | 广西电网公司电力调度控制中心 | Method for acquiring real-time states of power grid element |
| CN104237586A (en) * | 2014-08-19 | 2014-12-24 | 千江（上海）信息科技有限公司 | High-precision metering system of double-bus power supply circuit |
| CN104237586B (en) * | 2014-08-19 | 2017-06-06 | 国网河南省电力公司济源供电公司 | The high-precision measuring system of double-bus power supply circuit |
| CN106329727A (en) * | 2016-08-30 | 2017-01-11 | 合肥智博电气有限公司 | PT switching mechanism for arc suppression and resonance elimination apparatus |
| CN110047267A (en) * | 2019-04-24 | 2019-07-23 | 广东电网有限责任公司 | A kind of signal blockage method and system |
| CN112436490A (en) * | 2020-12-01 | 2021-03-02 | 北京四方继保自动化股份有限公司 | Multi-bus interconnection self-identification method and device |
| CN112436490B (en) * | 2020-12-01 | 2023-06-16 | 北京四方继保自动化股份有限公司 | Multi-bus interconnection self-identification method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101814729B (en) | 2012-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101341683B1 (en) | Protection and control system for electric power networks with signal and command interfaces at the primary equipment | |
| KR102218268B1 (en) | Substation Automation Operating Device Equipped with Automatic Generation of Failure Judgment and Failure Recovery Scenarios | |
| CN101789596B (en) | Automatic detection method of power grid failure | |
| CN101325289B (en) | Management system and method for temporary ground wire of electric power line or equipment | |
| CN105226816A (en) | Pressing plate Stateful Inspection and anti-error management system | |
| CN109564257A (en) | The fault detection and protection carried out during stable state using traveling wave | |
| CN101814729B (en) | Busbar protection identification method for automatically identifying running mode of duplicate busbar device | |
| CN107843800B (en) | Power supply network monitoring method, device and system | |
| CN202435020U (en) | Intelligent power grid monitoring protection system | |
| KR101505176B1 (en) | Apparatus and method for detecting failure of bus | |
| CN201639280U (en) | Microcomputer bus protector automatically identifying running ways of bus | |
| CN201060963Y (en) | Power line or equipment temporary earth wire use management system | |
| CN203069655U (en) | Induction-type high-voltage presence indication device | |
| CN104849602A (en) | GIS double-bus distribution equipment fault detection method and system | |
| CN1368772A (en) | Circulation recovery plan for transmitting branch | |
| CN109861395B (en) | Method for dynamically controlling state machine of intelligent substation relay protection equipment | |
| CN104319743B (en) | The method and apparatus of the main transformer high-pressure side Fast Operating Backup Protection based on station domain information | |
| CN105259860A (en) | Master-slave type intelligent electric device automatic configuration method | |
| CN201750225U (en) | Power system wide-area prevention of mistake blocking device | |
| CN203535152U (en) | Recessive defect detecting device for external starting contacts of failure protection equipment | |
| CN102005819A (en) | Fault isolation method of electric distribution network | |
| CN204965697U (en) | Clamp plate state is kept watch on and is prevented mistake management system | |
| CN103346617A (en) | Error logical judgment prevention system and judgment method considering multiple constraint conditions | |
| CN106329492A (en) | Simple bus protection method based on system topology | |
| CN206038788U (en) | Analog switch for device overhaul is cut soon to power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20160423 |