KR960013533B1 - Method and apparatus of opening/closing a circuit-breaker and a recloser - Google Patents

Abstract

cooperating a SFAS(Sectionalizing Feed Atomatic Switch) and a backup protection apparatus to remove transient-hindrance by counting operation regardless of the reclosing time of the backup protection apparatus; and separating an false interval by locking out only the switch of the false interval without unnecessary operation of opening again the sound interval switch.

Description

Distribution line open and close method and line switch control device

1 is a block diagram in the form of a radial distribution line.

2 is a block diagram of a dendritic distribution line.

3 is a block diagram in the form of a loop distribution line.

4 is a block diagram of a complex distribution line.

Figure 5 is a block diagram of the automatic control section switchgear control apparatus according to the present invention.

6 is a detailed circuit diagram of FIG.

7 is a block diagram of a control unit for automatic control of a combined line according to the present invention.

8 is a detailed circuit diagram of FIG.

* Explanation of symbols for main parts of the drawings

1: Current transformer 2: Current / ground fault line current detection unit

3: constant voltage storage power supply part 4: three-phase line positive voltage input part

5: Phase and ground fault current detecting unit 6: Inrush current suppressing unit

7: voltage and current suppression unit 9, 11, 102, 105: transformer

12,107,109: voltage detector 13,114: input timing unit

14: input drive unit 15: on-voltage detection memory unit

16,115: lockout timing section 17: voltage-free lockout timing section

18,112: counter reset timing unit 19: one time opening unit

20,113: counter 21: open drive

22: Trip output part 23: Auxiliary contact part

24,110 control circuit power supply 25,118 lockout output

26: motionless timing unit 27,123: tri-coil

28: Automatic switch section switchgear 29,116: Input coil

103,106: three-phase voltage input section 111: control logic section

117: coupling line automatic control switch 119: latch driving unit

120: counter reset part 121: input switch

122: release switch 124: control reset switch

The present invention relates to the automatic opening and closing of a three-phase Y multi-ground distribution line, and more particularly, to an efficient operation method of the distribution line opening and closing automation and the line switch control device.

In general, the distribution line cooperates with a circuit breaker (CB) and a line switchgear that is a substation breaker, and a recloser (Rec) for eliminating transient failure and permanent failure, and the recloser (Rec) and circuit breaker ( A switch section switch (SW) for separating a fault section in cooperation with a rear-end protection device such as a CB) or an automatic section switch (Sec) or a reclosing sectionalizer capable of re-entering for almost the same purpose; In combination with the RS).

In addition, a combination operation is performed using a tie switch (TS), which is operated in an open state at a position combined with a line configured at another substation and a bank for loop line operation. .

With the diversification of the line operation, the whole system is getting more complicated, and the improvement of customer service is more demanded, and the necessity of the distribution line is further emphasized, so that the distribution line operation system of FIGS. 1 to 4 will be described in detail. do.

1 to 4 are intended to illustrate the basic form of each distribution line operation method. First, the radial system shown in FIG. 1 is the simplest operation in terms of the operation form. Although it is a form, conventionally, as a switchgear (SW) for cooperating with the recloser (Rec), which is a post-protection device, the automatic section switch (Sec) is used to isolate the fault section (Fa) by fault current detection and counter cooperative operation. However, this means that the maximum number of installation units that can cooperate with Rec is less than three units, and there is a limitation in extending the distribution lines and segmenting the sections.

Another conventional method is a section switchgear (SW) which cooperates with a circuit breaker (CB) or a recloser (Rec) which is a post-protection device. There is a way to separate (Fa), but this is to cooperate with the operation of opening the time delay when the back protector Rec is instantaneous operation for eliminating excessive failure in the ground system, so The operating time of the reclose section switchgear RS was difficult and there was an unreasonable point due to the correction.

In addition, when the re-period opener RS inputs the fault section Fa during the check-in process, when the recloser Rec cuts the fault current again and becomes voltageless, the switch-opening section SW11… SW12 of the other key section is also applied. As all the openings are made again after the completion of the timing, the recovery time of the power line is increased as well as the number of installations increases, and the number of operation of each switch increases.

2 shows a block diagram of a branched distribution system, which includes the application of a radial line operation as a branching line coupled to a single radial form. Therefore, when permanent failure occurs in the failure section (Fb) after the branch line, conventionally, the recloser (Rec21) is input during the check-in process and the switch (SW21… SW22) for the section is input, and then when the breaker switch (SW23) is input, At the same time, the switch branch SW25 is connected to the soundproof branch line, and when the recloser Rec21 shuts down the fault current and the power is interrupted, the section switch SW23 is immediately opened to lock out the section opener SW25. As well as being locked out, all of the switches SW21... SW22 are also opened again. In addition, in order not to lock out the section switch SW25, the timing should be alternated by giving priority to the input timings of the section switches SW23 and SW25 at the time of closing, so that the input timing must be separately set after the branch point. Therefore, the more branch points are required, the more complicated correction procedures are required, and an uncomfortable process is expected when the line section is increased or decreased, and the complete return time of the healthy line is required.

3 is a block diagram showing the operation of the loop system. This includes the operation of a single radiation line operation as a method of reverse transmission for automatic recovery of the health section. In the conventional loop line, since the fault section (Fc or Fd) is inputted in the reverse transmission, there is a contradiction to repeat the operation for eliminating the fault section such as the first through the health line on the B-power side. it's difficult.

However, the conventional method used in the non-grounding system has the advantage of being able to perform reverse feeding after developing and locking out the section switches SW32 and SW33 at both ends of the fault section Fc, and the shear failure section immediately after the coupling switch TS34. In the case of (Fd) failure, the section switch SW33 is open-locked out, and the negative voltage detection and timing control may be possible in such a way that the coupling switch TS34, which is normally open, may not be inputted. When operating the switches SW31 ... SW32, SW33, SW35, SW36, SW, 37, the number of operations increases, and the return time is long.

Therefore, the primary object of the present invention is to cooperate for transient failure regardless of the time of one reclosing of the recloser Rec, reducing the number of operation of the switchgear when removing the fault section, and significantly shortening the completion time of returning to the line. The present invention provides a method for automatically opening and closing radial lines.

Radial line automatic opening and closing method of the present invention for achieving this purpose is to ensure the cooperation in eliminating the transient failure by counting operation regardless of the re-closing time of the dodging protection device, and in the confirmation process during the permanent failure removal It is characterized by the step that the switchgear is disconnected from the fault zone by opening the switchgear only to the fault section without any unnecessary operation of the section switchgear to be reopened and re-injected again. do.

For the operation of the radial line type in the present invention, the section switch (SW) is cooperated with a section automatic control section automatic switch section (SFAS) control device to be described later. When the occurrence occurs, the operation of eliminating the transient failure of the recloser Rec11, which is the after-protection device, is coordinated by the counting method so that the recloser Rec11 is instantaneously closed in order to eliminate the transient failure. In this case, all the switches are only counted once in the closed state. If the failure section Fa is not removed and permanent failure occurs, the second failure current of the recloser Rec11 is cut off, and when a power failure occurs, all sections of the switchgear are opened by completing the counting and the next closing of the recloser Rec11. In order to undergo the checking process afterwards, when the switchgear SW11… SW12 is sequentially inserted, the switchgear SW13 inputs a fault section, and the fault current is interrupted by the third trip operation of the recloser Rec11 to cut off the fault current.

In this case, only the section switch SW13 is open lockout (permanent open), so the fault section is separated, and the section switch (SW11… SW12) of the health line is only one-time counting operation and is not opened. At the same time as the third re-injection, the health line can be restored to its normal condition.

If it selectively cooperates with the circuit breaker (CB) as a back-protection wkd value, it is immediately opened only once in the event of a power failure, and after the input of the fault section is checked again, the healthy section that was completed during the separation of the fault section (Fa) The section breakers (SW11… SW12) are not opened again by the inoperative timing control function in order not to open only once, so that the circuit breaker is reclosed to the leaf loader (Rec11) after the fault section is separated. Will return immediately. This is possible because all operations of the line automatic control section switchgear have the ability to simultaneously control the counting operation, voltage and current sensing and timing coordination.

Therefore, the operation method of the radial line type is to cooperate to remove the excessive failure regardless of the time of recloser of the recloser, and the operation frequency of the switch is reduced by not recurring unnecessary operation of the switchboard when removing the fault section. In addition, it is possible to not only shorten the time for completing the track return much more, but also increase the number of installation of the section switch SW.

Other objects of the present invention include the operation of radial lines. Automatic opening / closing method for dendritic lines to prevent unnecessary power recurrence of other key lines and to shorten the return time by eliminating the need to set the time difference differently by separating the fault section by only opening and closing the switch section of the branch line where the fault occurs. To provide.

The dendritic line automatic opening and closing method of the present invention for achieving this object is to ensure the cooperation in eliminating the transient failure by counting operation regardless of the instantaneous reclosing time of the dobby protection device, and in the process of confirming the insertion of permanent failures When the section switch is open again and do not perform unnecessary operation again, only the switch section of the fault section is open-locked out to isolate the permanent fault section, and the switch section of the healthy section that has already been closed is not opened again, and the permanent fault is eliminated. When removing the fault section of the branch line where the fault occurred during the closing process, only the switch section of the fault of the branch line where the fault occurred is open-locked without the unnecessary operation that the switch section of the other branch line is opened again. The fault section is separated, and the switch of the sound dividing line is not opened again. Meurosseo would include the step of determining the fault line.

Therefore, the operation of the dendritic line system according to the present invention is performed according to the detection of fault current on the branch line before the breakdown voltage is detected when the control function after the automatic control section switch is turned on and when no voltage is applied during the lockout timing. Section switchgear SW23 which inputs fault section Fb even if the recloser (Rec21) and section switchgear (SW21… SW22) like 2 degrees input in turn, and next, switch section SW23 and (SW25) input simultaneously. ) Is only open-locked out, and the switchgear SW25 of the whole branch line as well as the switchgear SW21... SW22 are not operated and opened as described above, and thus can be recovered immediately upon re-insertion of the recloser Rec21. This is because, in case of switch SW25, open lockout is determined in the event of a power failure according to the fault current detection during lockout timing, other branch pneumatic lines that do not detect a fault are not opened even if a power failure occurs during lockout timing. .

Therefore, the dendritic line applying the automatic switch section switchgear according to the present invention can distinguish fault lines in addition to the advantages of the above-described radial line application, so that the time difference of the input timing is not required to be set differently, and unnecessary power failure of other healthy lines does not occur again. In addition, it can be seen that not only has the advantage of shortening the return time, but also the greater the number of installation points of the branch line, the more advantageous it is.

Still another object of the present invention includes the operation of the radial line, but it is possible to determine whether the fault line is inserted in the case of the reverse feed of the loop line to prevent unnecessary input of the failure section, and to restart the blackout of the other key wire combined It is to provide the automatic opening and closing method of the loop line which prevented it.

In order to achieve this object, the automatic loop line opening and closing method of the present invention provides a step for achieving a cooperative operation for transient failure by counting operation regardless of the instantaneous reclosing time of the dobby protection device, and a healthy section in the confirmation input process when removing permanent failure. The switchgear is opened again and does not perform unnecessary operation again, only the switchgear of the fault section is open-locked to separate the permanent failure section, and the opening of the healthy section that has already been inserted is not opened again, and is normally open If there is a fault in the section directly connected to the switchgear, it is not automatically inputted in the case of a fault in other line section. And the section switchgear of the health line inputted by the backfeed maintains the normal control function. It characterized by operating the control operation comprises the steps consisting of the line protection coordination normally iphu.

Therefore, the loop track operation method according to the present invention is intended to reverse transmission for automatic recovery of the health section, and of course, includes all the advantages of the single radial operation method. In this case, the line section can be subdivided, the fault line is not input during reverse transmission, and only the fault section is removed even in the sequence for eliminating the transient fault of the grounding system, and the line automatic control of the present invention for rapid recovery of the healthy line The section switch has a lockout function in the open state, including the control operation function of the radial line application method, and a tie feed automatic switch for controlling the counting sequence on the coupling switch TS for the loop line. By applying a switch (TFAS) control cooperative control at the same time in the cooperative system of the roof line can solve the above-mentioned conventional problems.

On the other hand, in order to avoid reverse feed of the fault section, in case of the fault section (Fc) and all fault sections and in the coordination of the shear switch section (Td) of the front end fault section (F34), the joining switch (TS34) is input or It is necessary to lock out in the open state.

First, in the case of the fault section Fc, the section switch SW33 which is in an open state when the section switch SW32 is opened and locked out, as in the operation of the radial line cooperative function, is locked out in a voltage-free state and thus the fault section Fc. In the permanently open state with the switches SW32 and SW33 at both ends, the coupling line automatic control switch TS34, which will be described later, may be supplied after the timing of the input in cooperation with the counting operation sequence.

In addition, in the case of the fault section Fd, as in all the above-described operations, the section switch SW33 is opened and locked out in the confirming and closing process, and the coupling switch TS34 which has undergone the sequence of eliminating the transient fault by the hand operation is The lockout timing is completed and locked out in the normally open state by the sequence situation.

Therefore, the loop line to which the automatic line automatic control section switch (SFAS) and the combined line automatic control switch (TFAS) of the present invention is applied is locked out in the function and open state of the automatic line automatic control section switch (SFAS) in the above-described radial line application. In addition to the counting operation sequence control coordination function of the combined line automatic control switch, including the function that can be performed, in case of failure of the section combined with the normally open switch as timing coordination, no automatic feed back is performed, and other line section failure. In this case, the line automatic control section switchgear is automatically maintained in the normal control function after the fault section is automatically separated and the reverse line is input and the healthy line is returned.

Therefore, this method has the ability of judging whether a faulty line is inserted in the reverse feed of the loop line, and thus, the advantage of the radial line is prevented, and unnecessary development of the fault line is prevented and the combined power line of the other key line is not developed. By maintaining the cooperative sequence for eliminating transient faults, even if the segment is further subdivided, it is possible to quickly and reliably implement the inherent presence of the loop line method.

However, the radial, dendritic and loop phase track methods described above may be partially complementary and limited in use, respectively, but are in fact not sufficient to automate the opening and closing of the track.

Therefore, another object of the present invention includes both the operation method and the control function listed in the radial, dendritic, and loop phase line applications, and in the automatic line control section switchgear, when both power supplies are present at the same time in the open state, the input is prevented. It is to provide a method for automatically opening and closing a composite line including a function.

In order to achieve this purpose, the composite line automatic opening and closing method of the present invention cooperates with the dodging protector so that coordination for eliminating the transient failure by counting operation regardless of the instantaneous reclosing time of the dodging protector is made, and permanent failure Confirmation when removing In the closing process, the switchgear is open again and does not perform unnecessary operation. Instead, it locks out the switchgear of the fault section and separates the permanent fault section so that the switchgear of the switchboard has not been opened again. Step and check when removing permanent failure When removing the fault section of the branch line that has failed in the closing process, the breaker section of the branch line where the fault occurred without the unnecessary operation of opening and re-opening the healthy section switch of the other branch line again. Only open the switch and lock out to isolate the fault section. Determination of the fault line by not reopening, and if there is a failure of the section directly connected to the open-coupled switchgear, do not automatically back-feeding, and in the case of a fault of the other line section, only the fault section is automatically separated. Determining whether to insert a faulty line in the reverse transfer to return to the healthy line after the reverse transfer, and the step of coordinating the protection of the conductors after the reverse transfer by maintaining the normal control function of the section of the healthy line in the reverse transfer, It characterized in that the automatic opening and closing control operation for the line protection coordination, including the step of automatically suppressing the input when both power supply of the switch is present.

Therefore, when describing the operation method of the composite line of the present invention, after the failure section (Fe) in Figure 4 is generated in the confirmation input process, the recloser (Rec41) is inserted into the inter-stage switchgear (SW41), and finally the section switch ( When SW42) is inserted and opened and locked out, the switches SW43 and SW45 are locked out in the open state as in the operation of the loop-type track method described above. Therefore, when the coupling line automatic control switch TS44 and TS47 are inputted in the reverse direction after the input timing, and when the section switch SW46 is fed in, only the fault section Fe is separated, the remaining sound section can be returned to normal operation. .

In addition, when the fault section Ff is generated and the section switch SW41 is open-locked out as described above, and the coupler switches TS44 and TS47 are simultaneously introduced in the reverse feed, the section switch SW43 and SW46 are next. Are simultaneously input, followed by the sequence switch SW45, but since there is already power on both sides of the section switch SW45, power is present on both sides of the section switch SW45. (SW45) is not opened due to the input blocking function to maintain the open state. Of course, if one of the power supply is out of power, the normal control function is possible by turning on after timing input.

In addition, in the case of the fault section Fg, the same operation as described above is performed so that the section switch SW43 is open-locked out, and the coupling switch TS44 is locked out in the open state so that the fault section Fg is not injected. When the section switches SW41 to SW42 are turned on by re-inserting the recloser Rec41, and the section switches SW45 and SW46 are turned on in turn, the coupling switch TS47 is again energized at the A-power side during input timing. Since both power sources (A, B-power) are present at the same time, the input timing is reset and is normally open.

Therefore, the composite line applying the line automatic control section switch and the combined line automatic control switch according to the present invention has the ability to automatically suppress the input of both power supply as well as the control ability when the above-described radial, resin, and loop phase lines are applied. There is an advantage that can be applied even if the dendritic loop line is configured to combine.

Still another object of the present invention is to detect the three-phase voltage of the two sides of the line means to open the time delay when one line is interrupted once; Means for locking out at the same time as the lock-out timing proceeds after closing, if the power is interrupted in progress, and means for locking out when the negative voltage lock-out timing is completed in the no-voltage (interruption) state. The present invention provides a switchgear control device for a distribution line automatic section that senses voltage and is controlled by timing coordination, which includes voltage and current suppression means for simultaneously detecting and controlling voltage and current of a line, and detecting fault current of a line. Fault current detection means for detection and transient failure elimination and confirmation Counting operation means that is normally reset after operation, counter reset operation means for resetting the count memory when the line returns to normal after the counting operation, inrush current suppression means for preparing the inrush current when the normal line is turned on, and correction A count open operation means which immediately opens when the counting operation is completed and does not lock out, an automatic shut-off means for detecting voltage on both sides of the line and suppressing the input when both power sources are in the open state, and lock-out timing in progress In case of a power failure, if it is normal current, it will not open, but if it is a fault current, it will be opened only once and lockout means. The lock-out means and the lock-out means which are locked out after the timing progresses in the open state when the voltage is applied to the closing timing progression operation. In the case of cooperating with circuit breaker by switch, it is input by non-operational timing means that does not open once even if normal line goes out during the sequence coordination process after the lockout timing is completed. And timing operation can be cooperatively controlled.

It is yet another object of the present invention to provide a control device for a normally open and close switch for automatic opening and closing of a line, and the control device includes a counting operation means for coordinating a sequence during elimination of a transient failure of the dodging protection device, and a doo protection. According to the cooperative selection of the equipment, the power interruption of one line continues after counting operation for the first time in case of circuit breaker and the second counting operation for recloser. The automatic out operation means and the lockout timing proceed when the voltage lost during the closing timing is recovered and before the sequence is reset again, and the lockout timing proceeds. Lockout means in the open state to control the automatic insertion of the fault zone by controlling When the lost voltage of one side of the sequence progresses, the sequence reset means returns from the open state to the normal control state after completion of the linset timing, so that the voltage can be sensed to cooperate with the operation and timing shift. Therefore, the automatic line section control (SFAS) control device and the combined line automatic control opener (TFAS) control device according to the present invention will be described in detail with reference to the accompanying drawings.

5 is a block diagram of a SFAS control device. First, a current flowing in a line is flowed at an appropriate ratio through the current transformer 1 and input to the phase / ground fault current sensing unit 2. The current signal rectified by the phase and ground line current sensing unit 2 is input to the constant voltage storage power supply unit 3, and the constant voltage storage power supply unit 3 is rectified by the phase and ground line current sensing unit 2. The combined current and the voltage output of the three-phase line positive voltage input unit 4 are OR-coupled. This makes it possible to secure the control power and the storage power required for the control device of the present invention simultaneously or separately as the voltage and current of the line.

In addition, a part of the signal typed by the phase / ground fault current detection unit 2 is converted into a voltage of an appropriate level and input to the phase / ground fault current detection unit 50 as a control signal that is proportional to the line current. Is supplied to the voltage / current suppressing section 7 of the inrush current suppressing section 6.

On the other hand, the line voltage is input to the three-phase line positive voltage input unit 4 through the transformer 9 in the power supply line 8 of the control device switchgear and the transformer 11 in the load side line 10, and is supplied with a fifth voltage. The transformer is transformed and rectified to the voltage required for the control device shown in FIG.

A part of the signal output from the rectified three-phase line positive voltage input unit 4 is provided to the constant voltage storage power supply unit 3 together with the rectified rectification signal of the phase and ground line current sensing unit 2 to provide a control power supply and a storage power. The power supply is secured, and another part of the output signal of the three-phase line positive voltage input unit 4 is input to the voltage detector 12, and the voltage detector 12 generates a signal according to the voltage detection.

In addition, the line voltage input from the power supply line and load side line transformers (9, 11) is connected to the presence or absence of voltages of the power supply side and load side lines (8, 10) via the three-phase line positive voltage input unit (4). And input to the input timing part 13 and the input driving part 14. Then, the voltage detector 12 divides the voltage signal output from the three-phase line positive voltage input unit 4 to an appropriate level and compares the voltage signal with a reference level to determine the presence or absence of the applied line voltage. The voltage signal output from the voltage detector 12 includes a voltage / current-suppression unit 7, an input timing unit 13, an ON voltage detection storage unit 15, and a lock out timing unit 16. , The voltage-free lockout timing section 17 and the counter reset timing section 18 are provided.

Particularly, the voltage and current suppressing unit 7 is inputted by combining the current signal output of the phase and ground current detecting unit 2 and the voltage signal output of the voltage detecting unit 12, so that the voltage and current of the line as a voltage current suppressing means. It is possible to control necessary for the operation of the inrush current suppressing unit 6, and the one-time opening 19 and the counting unit 20 depending on whether or not each is present at the same time.

In the constant voltage storage power supply unit 3, the reference voltage required for the control circuit and the present invention are controlled by a voltage source passing through the three-phase line positive voltage input unit 4 or a current source passing through the phase / ground fault current sensing unit 2. An external power supply unit 14, a voltage-free lockout timing unit 17, an opening / closing unit 21, a trip output unit 22, and an auxiliary contact unit 23 are formed by forming a small power supply necessary for the operation of opening and closing the device switch. And supply power to the control circuit power supply unit 24.

In FIG. 5, the control power supply and the reference voltage required for all control circuits not via the auxiliary point point 23 are supplied from the control circuit power supply unit 24, in particular, the output of the control circuit power supply unit 24 is the lockout output unit. It is turned off through 25 and turned on by the reset signal of the input driver 14 so that the on / off control of the control power supply can be made.

On the other hand, the auxiliary point point 23 is an auxiliary contact of the switch, the constant timing power supply unit 30 or the control circuit power supply unit 24 through the non-operating timing unit 26, the counter reset timing unit 18 and the counter unit 20 In other words, when the switch is turned on, the auxiliary contact unit 23 combines the power supply from the constant voltage storage power supply unit 3 and supplies the control power to the non-operation timing unit 26. 24, the control power is advanced to the counter reset timing 18 and the counter 20. When the switch is opened, the control circuit power supply 24 is coupled to the on-voltage detection memory 15 for input. The control power supply of the timing unit 13 is supplied.

Therefore, when a fault occurs in a line and the rear protection device operates instantaneously to remove the transient failure, or the line automatic control section switchgear (SFAS) that has completed the input in the confirmation input process undergoes a power failure again, the switch control device The counting operation is performed, which will be described in detail.

The counter unit 20 performs one-time counting operation through the accumulated control power supplied from the auxiliary contact unit 23 after the signal of the voltage / current suppressing unit 7 which has suppressed the input of the counter unit 20 is released. Is performed. At this time, the output of the counter 20 is only counted in accordance with the selection of the non-protected sugar selector switch SW2 (see FIG. 6) of the trip output 22 and the counter 20.

On the other hand, in the counting open state, when the line returns to the second time again and the power failure occurs, the counting is completed by the output of the counter unit 20 two times, so that the output of the trip output unit 22 is generated and the open driving unit 21 Since the trip coil 27 is driven, the switch 28 is opened at that time (when cooperating with the circuit breaker, the switch SW2 shown in FIG.

At the same time as the count opening, the open driving section 21 provides the reset path to the counter section 20, and the counter section 20 resets (initializes) the stored counting operation. The open driver 21 also provides a signal to the input driver 14 to thereby reset the on-voltage detection memory of the input timing part 13, the lockout timing part 16, and the voltage-free lockout timing part 17. Let's do it.

If the transient failure is removed by the instantaneous operation of the rear protection device, and the line is returned to the normal state by re-insertion of the recloser, and the process of resetting the counter unit 20 after counting once, the on-voltage of the voltage detector 12 The control power in the input state passing through the output and the auxiliary contact unit 230 is input to the counter reset timing unit 18, and after the predetermined counter reset timing is completed, the counter reset device of the open drive unit 21 is operated to operate the counter unit ( 20) is reset, the automatic control section switchgear control device used in the present invention is in the original normal control state.

On the other hand, when the inrush current suppression function is examined, if the line becomes a power failure (off voltage) in the normal current state during the operation of the line automatic control section opener, the set of the inrush current suppression unit 6 is performed during counting operation or opening operation. The output of the voltage / current suppressing section 7 which has suppressed the operation is released, and the inrush current suppressing section 6 performs the set operation by the constant voltage storage power supply passing through the control circuit power supply section 24. The latch signal is applied to the input terminal of the ground fault current detecting unit 5 to paralyze the detection function of the fault current so that the switch of the switch control device of the present invention suppresses the current detection for a predetermined time after the next input and suppresses the inrush current. Will have.

By the way, when the line is in a failure type state, when a power failure occurs (off voltage), as described above, the counting operation or the counting opening operation is also performed, and the voltage and current suppression that suppresses the set operation of the inrush current suppressing unit 6 is performed. The output of the unit 7 is canceled, but the set operation is suppressed from the axial power supply that has passed through the control circuit power supply unit 24 of the inrush current suppression unit 6 by the fault detection delay output of the phase / ground fault current detection unit 5. Since the set operation is not performed, this means that the fault current can be detected immediately when the line is re-entered in the event of power failure after detecting the fault current.

In addition, when the line automatic control section switchgear is opened automatically after completion of counting due to the permanent failure of the line, when the voltage of the line is applied when the back protection device is re-inserted, the line automatic control section switch is a transformer ( Line voltage is detected through 9 and 11 and provided to the voltage detection unit 12 through the three-phase line positive voltage input unit 4. The on-voltage output of the voltage detector 20 is input to the on-voltage detector memory driving unit 15 together with the control power in the open state output from the auxiliary contact unit 23 to perform the on-voltage detection set operation, and the on-voltage detection memory The latch output of the unit 15 is input to the input timing unit 13 together with the on-voltage output of the voltage detection unit 12 and the control power supply via the auxiliary contact unit 23 to perform a predetermined input timing. However, when the on-time voltage is continuously applied and the input timing is completed, the input signal 29 is supplied to the input drive unit 14 to drive the input coil 29 so that the switch 28 of the control device is input and at the same time the input timing unit 14 Is reset.

In addition, during the electric manual input operation, the input and control functions are reset by a manual switch (not shown) of the input drive unit 14, and the control circuit power supply unit 24 is also reset to perform normal control right. Done.

On the other hand, in the open state after completion of counting, when the voltages of both side lines exist at the same time, a part of the signal output from the three-phase line positive voltage input unit 4 suppresses the input timing unit 13, and the other part of the input drive ( By interlocking 14), the automatic switch section switchgear of the present invention is not inputted even by automatic or manual operation.

In the process of confirming the closing process, when the line automatic control section switchgear is finally opened only once when it is turned on, the line automatic control section switchgear of the fault section is turned on and at the same time, the reset drive unit 14 is reset. As a result, the operation of the input timing unit 13 is suppressed and the pulse generation of the counter unit 20 is suppressed. In addition, once the opening portion 19 is set and ready to operate, the lockout timing portion 160 proceeds to the lockout timing by the on-voltage output of the voltage detector 12.

At this time, the line fault current detecting means charges the signal transmitted from the upper and ground line current detecting unit 2 to a capacitor (not shown), and its output is suppressed by the voltage and current suppressing unit 7 so that it is immediately protected. When the line is out of power due to the operation of the device, the counter unit 20 is turned off at the moment when the suppression operation of the voltage / current suppressor 7 is released. Therefore, pulse generation is suppressed and output from the phase / ground fault current detector 5. The opening portion 19 is operated once by the fault current detection delay signal (discharge of the capacitor).

At this time, the output of the opening part 19 is opened by the opening drive part 21 by operating the trip coil 27 via the trip output part 22, and opening a switch by opening a fault section. At the same time, the output of the opening portion 19 once drives the lockout output portion 25, thereby turning off the control circuit power supply portion 24, thereby causing the lockout (stop of control function).

As a result, the switchgear of the present invention does not automatically input the paint section even when the line is restored and the on-voltage occurs when the power failure occurs after the fault current is detected during the lockout timing. In addition, in the process of locking out while opening, electrically open and counter reset by a manual switch (not shown) (see FIG. 6) of the open driving part 21 during manual opening operation, and at this time, the lockout output A signal is applied to the unit 25 to be locked out at the same time as opening by turning off the control circuit power supply unit 24.

On the other hand, the switchgear that did not detect the fault current does not open even if a power failure occurs during the lockout timing after the check-in. That is, since the counter 20 is also turned off at the moment when the line is interrupted during the lockout timing in the closing state as described above and the suppression operation of the conduction voltage / current suppression unit 7 is released, the pulse generation is suppressed. Since the open / close unit 19 cannot operate once because there is no output of the phase / ground fault current detecting unit 50, even if the fault current is not detected even in the same situation, the counting operation or the open does not occur even during a power outage during the lockout timing. This means that the fault line can be determined if there is a fault after the branch line.

On the other hand, the line automatic control section switchgear of the sound section where the line sequence of the check-in process has already been inserted and the lockout timing has been completed due to the breakdown of the line is not opened again even if a power failure occurs at the same time. This is explained.

When the rear guard is a recloser, the lockout timing is completed and the output of the lockout timing section 16 is provided to the opening section 19 once to turn off the opening section 19 and at the same time the counter section 20. The switch is returned to the normal state by turning on. Therefore, if the line is interrupted at the same time as the line automatic control section switchgear is turned on during the check-in and closing process, the line automatic control section switchgear which has already been closed is not counted once again by counting once again. . Therefore, when the fault section is removed and the line recovers to normal by re-insertion of the recloser, it is reset in the above-described counter reset manner to return to the original normal control state.

In addition, if the rear protection device is a circuit breaker, it is used by selecting a function in the switchgear for cooperation with the circuit breaker.In the above-described method, the lockout is performed after completion of the lockout timing so as not to open only once in a power failure. The timing of the timing unit 16 goes through an inactive timing sequence process by turning off the opening unit 19 once and operating the non-operation timing unit 26 without directly turning on the counter unit 20. As a result, during operation-free timing, even if the line is interrupted by the input of the automatic control section switchgear of the fault section, the switch unit of the completed healthy line does not operate the counter section 20 and the one-time opening section 19. As a result, the counting operation is not opened.

In this case, the non-operational timing is operated by the auxiliary contact unit 23 by the accumulated (charged) power of the constant voltage storage power supply unit 3 in the non-operational timing unit 26 so that the operationless timing can be advanced even during the operation. Supplied. When the protection coordination of the line is completed and the inactivity timing is completed, the output of the inactivity timing part 26 turns on the counter part 20, and returns to an original normal control state.

In the process of the automatic switch section of the automatic control section after the completion of the counting, the switch is locked out from the open state. When timing is started and the line is out of power again by the operation of the after-protection device, the input timing unit 13 which was in operation is reset by the off-voltage signal output of the voltage detector 12, and the above-described on-voltage detector storage unit 15 is operated. Is reset by the output of the on-voltage detection unit 15 and the off-voltage output of the voltage detection unit 12 and the off-voltage output of the voltage detection unit 12 described above. Since 14) is operated by being coupled to the storage power of the constant voltage storage power supply unit 3, this also enables timing operation during power failure.

Therefore, since the line automatic control section switchgear of the failure section is open-locked out, in the line automatic control section switchgear after the failure section, a power failure is continued and a predetermined voltage-free lockout timing is completed to provide a signal to the lockout output unit 25. Done. At this time, the lockout output section 25 performs the lockout set operation to turn off the circuit power supply of the control circuit power supply section 24. As a result, the line automatic control section switchgear after the failure section is locked out from the open state by paralyzing the control function of the switch control device of the line automatic control section. In this case, even if the voltage is applied in reverse transmission, only the automatic switch section line switch at both ends of the fault section is permanently opened.

FIG. 6 shows a detailed circuit diagram of the automatic switch control section according to the present invention shown in FIG. 5, in which current flowing through the track is provided in each phase (∮a, ∮b, ∮c). It flows through the primary side of (1a, 1b, 1c). The secondary sides of these current transformers 1a, 1b, 1c are commonly connected. The current flowing through the current transformers 1a, 1b, and 1c flows in an appropriate ratio, and the current thus obtained is input to the phase / ground fault current sensing unit 2. Each forward current output from the current transformers 1a, 1b and 1c is orally coupled through the rectifying diodes 2a, 2b and 2c of (2) to detect phase currents, and the reverse current is a ground fault current through the rectifying diodes. Will be detected.

The currents sensed at the rectifier diodes (2a, 2b, 2c) and (2d0) of the upper / ground fault line current sensing unit 2 are connected to the current source diode (2f) through the phase current pickup resistor 2e and the ground current pickup resistor 2f. 2g), the current passing through the diode 2g is input to the constant voltage storage power supply unit 3.

At this time, the voltage signal of the three-phase line positive voltage input unit 4 that has passed through the current signal voltage source diode 3a input to the constant voltage storage power supply unit 3 is orally coupled, and is also input to the emitter of the power transistor 3b. Then, it is connected to the minus side of the rectifier circuit of the upper / ground fault line current sensing part 2 again through the collector of the ground side. On the base side of the power transistor 3b, the constant voltage of the control power source is maintained through the zener diode 3c, while the emitter side is connected to the capacitors 3d and 3e again to charge the constant voltage. In other words, the current passing through the current source diode 2g is charged in the capacitor 3d, and the voltage output from the three-phase line positive voltage input unit 4 is input through the resistor 3f to provide the resistors 3g to 3j. After passing through a constant voltage circuit composed of the transistors 3k and 3l and the control diode 3m, the capacitor 3e is charged through the diode 3a, the switch 3n, the diode 3p and the resistor 3q.

On the other hand, the line voltage is 3 from the three-phase transformer 9 (see FIG. 5) of the power supply line 8 of the line automatic control section switchgear and the three-phase transformer 11 of the load side line 10 (see FIG. 5). It is input to the phase line positive voltage input unit 4, and is transformed and insulated through each of the auxiliary transformers 4a, 4b, 4c, 4d, 4e, and 4f, and each diode (4g, 4h, 4i, 4j, 4k, 4l). It is rectified by O and combined. The combined voltage signal is stabilized by a constant voltage circuit composed of resistors 3g to 3j, transistors 3k and 3l, and a zener diode 3m for constant voltage via the resistor 3f of the constant voltage storage power supply unit 3. Keep the voltage. The constant voltage thus obtained is orally coupled with the current source diode 2g of the phase-and-ground current sensing unit 2 through the voltage source diode 3a, and then charged in the capacitors 3d and 3e to smooth and accumulate the control power. . This makes it possible to secure the control power source and the shaft cleaning source necessary for the control device of the present invention simultaneously or separately as the voltage and current of the line.

In addition, a part of the phase current signal sensed and rectified by the phase-and-ground line current detection unit 2 flows to the resistor 2h via the phase pickup resistor 2e. When the resistor 2h is turned on, the resistor 2j The voltage signal via) is accumulated through the collector-emitter terminal of the transistor 2i, so that the collector terminal goes low. Then, since the bias voltage in the low state is applied to the resistor 2k, the transistor 2l is turned off, so that the voltage signal of the high state passing through the collector complex of the transistor 2l, that is, the resistor 2m, is the diode 2n. ) Is provided to the inrush current suppression section 6 and the voltage and current suppression section 7 via.

The other part of the phase current signal includes a voltage signal proportional to the phase current formed in the phase current pickup resistor 2e and a voltage path proportional to the ground current formed in the ground current pickup resistor 2f by the ground current signal. It is provided to the phase- and ground fault current detecting unit 5 via 2p) (2q).

On the other hand, the voltage signal transformed and insulated by the three-phase line positive voltage input unit 4 is rectified by the respective rectifier diodes 4m, 4n, 4p, 4q, 4r, and 4s, combined, and then input to the voltage detector 12. At this time, the voltage signal input to the voltage detector 12 is applied to the inverting input terminal of the comparator 12f through the resistors 12a and 12b, the capacitor 12c, the zener diode 12d and the resistor 12e, and the comparator ( A reference voltage by the resistors 12g, 12h, 12i is applied to the non-inverting input terminal of 12f). Therefore, when the on voltage of the line is detected, the output of the comparator 12f goes low. At this time, the voltage detection unit 20 can detect a signal according to the presence or absence of the line voltage.

In addition, the three-phase line positive current pressure input unit 4 can detect the single-phase voltage of both lines through the relay automatic contact section switch auxiliary contacts MB1 and MB2 by the relays R1 and R2. and are coupled to the input timing unit 13 and the input driver 14.

Therefore, when the line automatic control section switchgear in the normal operation state is turned on, both sides of the voltage are applied to the open / close control device, and when the current flows in the line, the collector side of the transistor 2l of the up- and down-ground line current sensing unit 2 flows. The voltage is provided to the inrush current suppression section 6 and the voltage / current suppression section 7 via the diode 2n. In addition, since the comparator 12f of the voltage detector 12 generates a low output, a low state bias voltage is applied to the base of the transistor 12m via the resistor 12j, the diode 12k, and the resistor 12l. The transmitter 12m is turned off.

When the transistor 12m is turned off, the high-state signal via the zener diode 12n, resistor 12p, and diode 12q is separated from the diode 2n configured inside the phase-and-ground line current sensing unit 9. Coupled to suppress the voltage-free lockout timing portion 17 and turn on the transistor 7b via the bias resistor 7a of the voltage-current suppression portion 7. When the transition 7b is turned on, its collet terminal is brought into a low state so that the operations of the opening portion 19, the pre-rush portion 6 and the counter portion 20 are kept in a suppressed state. In addition, as the transistor 12m of the voltage detector 12 is turned off, a high state signal is applied to the base of the transistor 12s via the resistor 12r0, and the transistor 12s0 is turned on. When is turned on, a low signal is applied to the base of the transistor 12t through the resistors 12u and 12v so that the transistor 12t is turned off, and thus the resistance 12w applied to the collector side of the transistor 12t. The output in the high state suppresses the on-voltage detection memory unit 150 and the input timing unit 13. Then, the low-out output generated on the collector side of the transistor 12s is connected to the lockout timing unit 16. Since the counter reset niming unit 18 is suppressed and controlled, the control operation is maintained in a normal state.

If a fault occurs in the track, the fertilizer furnace operates instantaneously to eliminate the transient fault, or the counting operation is performed when the line automatic control section switchgear completes the input during the check-in process. It demonstrates concretely.

When the line is out of power, the voltage caused by the phase current pick-up resistor 2e0 of the phase-and-ground line current sensing unit 2 is not generated. Accordingly, the transistor 2i is turned off, and the collector side of the transistor 2i is resisted. The transistor 2l is turned on via the bias resistor 2k because it becomes high by (2j) When the transistor 2l is turned on, its collector side is turned low.

On the other hand, when a power outage of the line occurs, the voltage signal is not maintained in the transformers 4a to af of the three-phase line positive voltage input unit 4, and thus a voltage signal is generated through each of the diodes 4m to 4s. Therefore, no voltage signal is applied to the inverting input terminal of the comparator 12f via the resistors 12a, 12b, 12e. At this time, the comparator 12f outputs a signal in a high state and provides it to the base of the transistor 12m via the resistor 12j, the diode 12k, and the resistor 12l, thereby turning on the transistor 12m. The collector side of 12m also becomes low, and the bias voltage is not applied to the bias resistor 7a of the voltage / current generator 7 so that the transistor 7b is turned off.

When the transistor 7b0 is turned off, the signal suppressing the input of the counter 20 is released, so that the input of the counter 20 is applied to the resistor 20c0 via the resistor 20a and the capacitor 20b. When the transistor 20d is turned on, the relay coil RS is excited once through the latch relay contact LR7B1, and the moment the contact RSA1 is turned on by the operation of the relay coil RS. In this case, the current flows through the contacts LR1B1 and LR2B2 through the contacts LR1B1 and LR2B2 to the relay coil RY1, so that the relay coil RY1 is excited and the contact RY1A1 is turned on so that the relay coil RS1 is turned on. Keep it self.

At the same time, the contact RY1A2 is turned on, and the transistor 20f is turned on through the contact RSA2 and the resistor 20e, and the transistor 20f is turned on through the contact RY1A2 and the resistor 20E. Since the path through RY1A2 and the resistor 20g is grounded to the collector-emitter of the transistor 20f, no signal is applied to the coupling capacitor 20h. At this time, when the pulse signal of the transistor 20d becomes low, the relay contact RSA1 is turned off (at this time, the contact RSA2 is also turned off). As the contact RSA2 is turned off, no current flows in the resistor 20e so that the transistor (20F) It is also turned off. When the transistor 20F is turned off, a high-state signal is applied to its collector through the contact point (A1A2) and the resistor 20g, so that a current flows in the coupling capacitor 20H, and this current causes the resistor 20i. The transistor 20G is turned on.

When the transistor 20j is turned on, the latch relay set coil LR1.S operates to turn on the contact LR1A2, turn on the contact LR1B1, and turn off the pick protection device select switch SW1A of the trip output unit 22. ) And (SW1B) are in the same position as that of FIG. 6, so that the ON state is maintained as long as the reset coils LR1 / R of the open drive unit 21 are normally driven, and one-time counting operation is performed by preparing for the next sequence. Will perform. Therefore, the counter 20 only counts once, and the switchboard automatic control section switch is not opened.

On the other hand, in the open state of the coefficients, in the case of cooperating with the circuit breaker, the rear protective device selector switches SW1A and SW1B of the counter unit 20 and the trip output unit 22 are in the circuit breaker switch (SW1A is off and SW1B is on). As described above, the relay TR of the tripping force number 22 is operated by the ON operation of the latch relay contact LR1A1 of the trip output unit 22 to open the drive unit 21 via the opening / closing auxiliary contact MA3. ), The contact TRA1 is turned on, so that the trip coil 27 is driven so that the switch 28 can be opened only once.

Then, the second protective contact selector switch SW1 is corrected in the recloser and the cooperative position (that is, SW1A is turned off SW1B is turned on), and the second time due to a research failure that is not eliminated by one-time instantaneous operation of the rear guard device. In the case of power failure again by the operation, the relay contacts RSA2 and RSA3 of the counter unit 20 are turned on and the relay coil RY2 is self-maintained in the above-described situation (single counting operation). When the relay coil RY2 operates, the relay contact RY2A2 is turned on and the high voltage vise voltage of the resistor 20K is turned on to turn on the transistor 20l.

When the transistor 20l is turned on, the current through the relay contact RY2A2 and the resistor 20m is bypassed to ground through the collector-emitter of the transistor 20l and its collector goes low. At this time, the capacitor 20n is in a discharge state, and the transistor 20L is turned off the moment the relay contacts RSA2 and RSA3 are turned off.

When the transistor 20L is turned off, the collector is in a high state, so that a current flows through the coupling capacitor 20m via the relay contact RY2A2 and the resistor 20m, and a bias voltage is applied to the resistor 20p. As a result, the transistor 20q is turned on. A current flows in the relay RR2 due to the turn-on of the transistor 20q. In this case, the relay TR is operated by turning on the relay contact RR2A1 of the trip output unit 22.

As the relay TR of the trip output unit 22 is operated, the relay contact TRA1 in the open drive unit 21 is turned on, and the trip coil 27 is provided through the switch protection contact MA3 and the relay contact TRA1. This will make the count open in two times. In this case, when the relay contact TRA1 is turned on, the lockout timing does not proceed even when the reset coils LR3 / R of the injection driving unit 14 are turned on and the voltage detection memory is reset to open the voltageless memory.

Then, the odd reset operation is as follows. As described above, the coefficient is opened by the relay contact TRA1 of the open driver 21 and at the same time, a high voltage signal is applied to the base of the transistor 21c via the contact TRA1, the resistor 21A, and the diode 2b. Is applied, so the transistor 21c is turned on. When the transistor 21c is turned on, the hatch relay reset coils LR1 / R operate to reset the hatch contacts LR1B1 and LR1A2 of the counter unit 20 and the latch contacts LR1A1 of the trip output unit 22. Return to the initial normal control state.

On the other hand, when the transient failure of the line is eliminated by the one-time instantaneous operation of the rear protection device and the line is returned to normal by re-insertion of the recloser, the procedure of counter reset by timing is as follows.

After the one-time counting operation, if the line constant pressure is normally applied, as described above, the output of the comparator 12f of the voltage detector 12 goes low and the transistor 12m is off accordingly, but the base of the transistor 12s is turned off. The transistor 12s is turned on by the signal of the high state via the zener diode 12n and the resistors 12p and 12r. When the transistor 12s is turned on, its collector goes low, and the collector of the transistor 18b goes high via the resistor 18A of the counter reset timing section 18.

Since the collector of the transistor 18b is in a high state, a voltage is charged to the capacitor 18f through the base resistor 18e of the transistor 18d via the variable resistor 18c, and a predetermined time has elapsed, so that charging is completed. Then, a high voltage is gradually applied to the non-inverting input terminal of the comparator 18h through the resistor 18g. In this way, when the input voltage of the comparator 18h increases and its level reaches the reference voltage, the output of the comparator 18h becomes high.

The high state signal output from the comparator 18h is applied to the base of the transistor 21c in the open driver 21 via the resistor 18i and the diode 18j to turn on the transistor 21c to turn on the latch relay. By driving the set coils LR1 / R, the latch contact LR1A1 of the trip output unit 22, the latch contacts LR1A2, LR1B1 and the counter reset timing of the counter unit 20 are operated as in the above-described counter reset operation. The latch contact LR1B2 of the unit 18 is reset so that the apparatus of FIG. 6 is returned to the initial normal control state.

On the other hand, when the inrush current suppression function is examined, if the power failure occurs during the operation of the line automatic control section switchgear (when the current of the line is a normal current), the set of the inrush current suppression unit 6 is performed during the counting operation or the counting opening operation. Since a low path is applied to the base resistor 7a of the transistor 7b in the voltage / current suppressing unit 7 which has suppressed the operation, the transistor 7b is turned off. Since the low signal is applied to the base resistor 7a of the transistor 7b, the transistor 7b is turned off. When the transistor 7b is turned off, the collector 6 of the transistor 6b which has suppressed the positive side of the coupling capacitor 6a of the inrush current suppressing unit 6 in the low state has passed through the resistor 6c and the capacitor 6a. The constant voltage storage power of the control circuit power supply unit 24 is applied.

In addition, since there is a low signal from the phase-and-ground fixed current detection unit 5 in the base of the transistor 6b in the inrush current suppressing unit 6, the collector of the transistor 6b keeps the high state even when a power failure occurs. Therefore, the set circuit of the inrush current suppressing section 6 causes a current to flow in the coupling capacitor 6a via the resistor 6c, so that a pulse is input to the base of the transistor 6e through the resistor 6d and the transistor 6e. ) Is turned on. When the transistor 6e is turned on, the latch relay set coils LR6 / S are operated so that the contact LR6A1 of the phase-and-ground fault current detecting unit 5 is turned on, and thus the inrush current suppressing unit 6 is turned on. When the contact LR6B1 is turned off, the non-inverting input terminals of the comparators 5a and 5b of the phase-and-ground fault current detection unit 5 are shorted to the ground side to suppress current detection.

Therefore, when the control power is formed when the line is de-energized, the capacitor 6h is charged with a predetermined voltage through the variable resistor 6f and the resistor 6g of the inrush current suppressing portion 6. When the charging of the capacitor 6h is completed, a voltage is gradually applied to the non-inverting input terminal of the comparator 6j via the resistor 6i, and the input voltage is higher than the reference voltage by the resistors 6k and 6l. The comparator 6j applies a high state signal to the transistor 6n through the resistor 6m.

At this time, the transistor 6n is turned on and the latch relay reset coils LR6 / R are operated to turn off the contact LR6A1 in the phase-and-ground fault current detecting unit 5, thereby turning off the contact current suppressing unit 6 in the inrush current suppressing unit 6. The contact LR6B1 is turned on and reset. Therefore, it has a function of suppressing a predetermined inrush current, thereby preventing malfunction.

However, when the voltage is applied again after opening the coefficient, and the line automatic control section switch is automatically input, the transistor 12t of the voltage detector 12 is applied when the voltage of the line is applied when the back protection device is re-inserted. Is operated as described above, or turned off so that its collector is in a high state, where the on-voltage detection memory driving unit 15 is turned on by the power supply through the resistor 12w. Since the control power is formed via the MB3), the on-voltage detection memory drive unit 15 is the on-voltage detection memory drive unit 15 because the control power is formed via the on-contact point MB3 in the open state of the auxiliary contact unit 23. A current is applied to the capacitor 15b through the resistor 15a of the transistor, and the transistor 15b is turned on by the bias voltage of the resistor 15c.

When the transistor 15d is turned on and the latch relay set coil LR3 / S is operated, in this case, the contact LR3B1 of the input timing unit 13 is turned off, and the contact of the voltage-free lockout timing unit 17 ( LR3A1 is turned on, and the contact LR3A2 of the lockout timing section 16 is also turned on.

Therefore, the contact LR3B1 of the input timing part 13 is turned off, so that the input timing part 13 charges a voltage to the capacitor 13c on the base side of the transistor 13b via the variable resistor 13a. In this case, when the charging of the capacitor 13c is completed, a high state signal is gradually applied to the non-reflective force terminal of the comparator 13e through the input resistor 13b, and the input voltage through the resistor 13d is referenced. When the voltage is higher than the voltage, the comparator 13e outputs a signal in a high state to turn on the transistor 13g via the resistor 13f. When the transistor 13g is turned on, the relay coil RR4 is excited, and at this time, the contact point RR4A1 of the input driver 14 is turned on, and the auxiliary switch contact point MB4 and the interlock contact point R1B1 (R2B1) and the contact point ( The signal passing through RR4A1 is provided to the input coil 29 via the diode 14a, and the input coil 29 inputs the switch 28. At the same time, as the contact point RR1A1 of the inlet driving unit 14 is turned on, the latch relay coils LR3 / R, LR5 / R, LR7 / S are excited to set or reset the respective operation units described above to control the control function normally. To be reduced.

In addition, during the electrical manual closing operation, the push button switch PB1 of the feeding drive unit 14 is turned on to switch the switch PR1 via the switch auxiliary contact MB4 and the interlock contact R1B1 and R2B1 as described above. The switch 28 may be input by driving the input coil 29 through the diode 14b. At the same time, the latch relay coils LO / R as well as the latch relay coils LR3 / R, LR5 / S, LR7 / S are reset by the switch PB1, The contact LOB1 can be reset.

On the other hand, in the open state after the completion of counting, when the voltages of both lines exist at the same time, the voltages on both sides of the line are applied so that the relays r1 and r2 in the three-phase line voltage input unit 4 are auxiliary contacts (mb1 and mb2). In this case, the contacts R1A1 and R2A1 of the input timing part 13 are turned on in series to suppress the operation of the input timing part 13 to suppress the input timing function, and also the input driving part 14. By closing both of the contacts R1B1 and R2B1, the interlocking of the input driving section 14 suppresses the closing of the switch.

And, finally, in the confirmation input process, when the switch of the automatic control section of the line of the failure section is finally input, the process of the open lockout is explained as follows.

First, the detection of the fault current by inputting the fault section shows that the phase fault current sensed by the line flows through the phase current pickup resistor Ze of the phase and ground line current sensing unit 2, where the phase current pickup resistor ( 2e) The voltage at both ends is input to the phase / ground fault current detection unit 5 via the resistor 2p. The phase fault current inputted to the phase / ground fault current detector 5 flows to the emitter collector of the transistor 5d at a voltage divided by the resistance value of the variable resistor 5c.

When the phase current is a fault current, the voltage across the resistor 5f divided by the resistors 5e and 5f is provided to the non-voltage input terminal of the comparator 5a, and the input voltage is supplied by the resistors 5g and 5h. If higher, the comparator 5a generates an output signal in a high state and charges the capacitor 5k via the resistor 5i and the diode 5g. When the charging of the capacitor 5k is completed, the transistor 5m is turned on through the resistor 5l.

When transistor 5m is turned on, the signal through resistor 5n is bypassed to ground through the collector-emitter of transistor 5n, so its collector terminal goes low, and the signal through resistor 5P is transistor Can't turn on (5q). As the transistor 5q is turned off, its collector becomes high, and the voltage signal through the resistor 5r is input to the contact LR5A1 of the opening 19 once via the diode 5s.

In this case, since the contact point LR5A1 of the opening portion 19 is already set and turned on at the time of closing, the high voltage signal passing through the diode 5s of the phase-and-ground fault current detecting portion 5 is one opening portion ( The transistor 19b is turned on through the contact LR5A1 of the 19 and the resistor 19a. At this time, since the collector 19 state of the transistor 19b is coupled to the collector side of the transistor 7b of the voltage / current suppressor 8 through the transistor 19e by the resistors 19c and 19d, the voltage of the line As long as a current exists, further operation is suppressed.

On the other hand, in the case of the ground fault current, the ground fault current sensed by the line flows through the ground fault current pickup resistor 2f of the phase and ground fault line current sensing unit 2, and the voltage across the ground fault current pickup resistor 2f is the resistance. Via (29), it is input to the phase / ground fault current detection part (5). At this time, the ground fault current is applied to the transistor 50d at a voltage divided by the resistance value of the variable resistor 50c to turn on the transistor 50d so that a current proportional to the line flows to the emitter collector.

When the ground current is a fault current, the voltage across the resistor 50f divided by the resistors 50e and 50f is provided to the non-inverting input terminal of the comparator 5b, and the input voltage is supplied by the resistors 50g and 50h. When the reference voltage is higher than the reference voltage, the comparator 5b outputs a high state signal and charges the capacitor 50k via the resistor 50i and the diode 50j.

When charging of the capacitor 50k is completed, the transistor 50m is turned on through the resistor 50l.

When transistor 50m is turned on, the signal through resistor 50n is bypassed to ground through the collector-actor of transistor 50n, so its collector terminal goes low, and the signal through resistor 50p is a transistor. Can't turn on (50q). As the transistor 50q is turned off, its collector goes high. As the resistor 50r is turned off, its collector goes high, and the voltage signal passing through the resistor 50r passes through the diode 50s. Is input to the contact point LR5AL of the opening portion 19 once.

In this case, as described above, since the contact point LR5AL of the opening portion 19 is already in the ON state, the signal passing through the diode 5s or 50s of the phase-and-ground fault current detecting portion 5 is a single opening portion ( The transistor 19b is turned on through the contact LR5A1 of the 19 and the resistor 19a. In this case, the transistor 19e is turned off and the collector of the transistor 19e is coupled to the transistor 7b collector of the voltage / current suppressor 7 through the diode 19g, so that as long as the voltage and current of the line exists. The operation is suppressed.

Therefore, when the contact LR5A1 of the opening portion 19 is turned on and a power failure occurs after the fault current is detected, the charging voltage of the capacitor 5k or 50k of the phase fault detection section 5 causes the resistor 51 or 50l. The output of the opening portion 19 is delayed during the discharge time, and the high output of the opening portion 19 is the trip output portion the moment the transistor 7b of the voltage / current suppressing portion 7 is turned off. It is transmitted to the lockout output 25 of (22).

In this case, the high output of the opening portion 19 turns on the transistor 22c via the diode 22a and the resistor 22b of the trip output portion 22, and at this time, the voltage signal passing through the resistor 22d. Is bypassed to ground through the collector-emitter of transistor 22c, so transistor 22f is not turned on by resistor 22e. As the transistor 22f is turned off, the voltage signal turns on the transistor 22j via the resistor 22g, the capacitor 22h, and the resistor 22i. When the transistor 22j is turned on, the relay TR is left open, and as described above, the contact point TRA1 of the open driver 21 is turned on so that a current flows in the trip coil 27, so that the switch 28 is opened. Can be.

In addition, the high output of the opening portion 19 is simultaneously applied to the lockout output portion 25, and the signal passing through the shunt resistor 25a and the diode 25b turns on the transistor 25c. The transistor 25d connected to the Darlington is also turned on so that the latch relay set coil LO / S is excited to turn off the contact LOB1 in the control circuit power supply unit 24. As a result, the control power is turned off at the same time as the opening, and thus becomes a permanent opening in one opening.

In other words, if the switchgear of the present invention becomes a power failure after detecting a fault current during the lockout timing, the fault section cannot be automatically input even when the line is returned to the on voltage. Further, in the process of locking out while opening, electrically pressing the manual push switch PB2 of the open driving part during manual open operation, the transistors 25c and 25d of the lockout output part 25 are operated and the latch relay As the set coil LO / S is excited, the contact LOB1 in the control circuit power supply unit 24 is turned off and the trip coil 27 is operated to open and close the switch 28 at the same time.

Contrary to the above, if the lockout timing is a normal current during the true handling (that is, the contact LR5A1 of the opening portion 19 is in the ON state) at the same time, the operation is not performed even in the event of a power failure. This is because there is no fault current detecting output of the opening portion 19 and the contact LR5B2 of the counter portion 20 is turned off.

Therefore, when the lockout timing is operated at the same time as the input, the input of the lockout timing unit 16 is provided from the collector of the transistor 12s of the voltage detector 12, in which case the collector potential of the transistor 12s. Since is a low state, a low state signal is also applied to the resistor 16a of the lockout timing unit 16, so that the transistor 16b is turned off.

At this time, since the contacts LR3A2 and LR6B1 are all turned off at the same time as the switch is turned on, the voltage is charged to the capacitor 16e through the base of the transistor 16d via the resistor 16c, and the lockout timing proceeds.

After charging of the capacitor 16e, the voltage is gradually increased in the comparator 16g via the resistor 16f. When the input voltage is higher than the reference voltage, the comparator 16g generates an output in a high state to generate a resistance ( 16h) turns on the transistor 16i. When the transistor 16i is toned on, the latch relay reset coil LR5 / R is reset so that the contact LR5A1 of the opening portion 19 is turned off, and the contact LR5B2 of the counter portion 20 is turned on. As a result, when the post protection device selector switch SW1a of the counter unit 20 is a recloser, the control circuit prepares for counting operation normally. Therefore, if the line is interrupted at the same time as the line automatic control section switchgear is turned on during the closing process, the switch is not opened again by performing the counting operation once again. As a result, the fault section is removed, and when the line recovers to normal by re-insertion of the recloser, it is reset in the above-described counter reset manner to return to the original normal control state.

On the other hand, in the case where the rear protection device is a circuit breaker, when the push select switch SW1 is operated to cooperate with the circuit breaker, the squelch SW1a of the counter 20 is turned off, and Since the switch SW1b is turned on, even when the lockout time is completed, as described above, the contact portion LR7B1 is turned off, and therefore the counter 20 is not turned on.

Therefore, the switchgear which has completed the input of the healthy line in the confirmation input process has a non-operation timing means by the selector switch SW1 in order not to immediately open only once in the power failure again. This is explained.

Upon input, the contact LRA1 of the non-operational timing unit 26 is turned on and the contact LR7B2 is off to prepare for the inoperable timing after the lockout timing. The contact LR7B1 of the counter unit 20 is off. Therefore, counting operation is not performed. On the other hand, the power supply of the non-operation timing section 26 is inverted by the capacitors 3d and 3e of the constant voltage storage power supply section 3 so that the contacts MA2 of the auxiliary contact section 23 pass through the respective diodes 3s and 3r. It is applied to the contact LR7A1 of the non-operation timing unit 26 through the supplied.

In addition, even after the contact LR5B2 of the counter unit 20 is turned on after completion of the lockout timing, the counter unit 20 is still prepared for counting operation because it is opened by the back protection device selector switch SW1a.

Therefore, when the lockout timing is completed, the contact point LR5A2 of the non-operation timing section 26 is turned off, so that a voltage is charged to the capacitor 26c on the base side of the transistor 26b via the resistor 26a. 2 cathode when the charging voltage of the capacitor 26c connected to the anode side of the programmable unijunction transistor 26d reaches the reference voltage on the gate side of the programmable junction transistor 26d after a predetermined inactivity timing has elapsed. Through the high voltage signal is applied to the base of the transistor 26e. At this time, the transistor 26e is turned on, and the transistor 16f connected thereto is also turned on to excite the lattice relay reset coil LR7 / r.

As the latch relay reset coil LR7 / R is excited, its contact LR7A1 is turned off, the contact LR7R2 is turned on so that the inactive timing section 26 is turned off, and the contact LR7B1 of the counter section 20 is turned off. Is on, the pulse generating circuit of the counter 20 is ready for normal operation. Therefore, even in the case of cooperation with the circuit breaker, the switchgear control device of the healthy line is completed after the lockout timing is completed and the non-operation timing is progressed for a predetermined time, and when the sequence for removing the fault section proceeds, even if a power failure occurs, it is not remodeled again.

Looking at the process in which the automatic switch section of the automatic control section after the completion of the counting is locked out in the opened state, the operation of the input driving part 14 due to the ON operation of the contact TRA1 of the open driving part 21 during the counting opening operation. The latch relay reset coils LR3 / R are also driven at the same time so that the contact LR3A1 of the voltage-free lockout timing section 17 is turned off. Therefore, the voltage-free lockout timing does not operate even if the voltage-free state continues after the coefficient is opened. This means that the preparation operation is prepared.

However, when the voltage of the line is applied in the count opening state, as described above, the transistor 15d of the on-voltage detection memory driving unit 15 is operated to set the latch relay set coil LR3 / S. When the contact LR3B1 of the input timing part 13 is turned off, the contact LR3A1 of the voltage-free lockout timing part 17 is turned on, and the voltage is continuously applied, the input timing is operated as described above. . At this time, when no voltage is applied while the input timing is in progress, the collector side of the transistor 12t of the voltage detector 12 goes low, and the input timing is reset, and at the same time, the low output of the collector of the transistor 12m of the voltage detector 120 is reset. Since the low signal is also applied to the base resistor 17b of the transistor 17a of the voltage-free lockout timing section 17 connected to the transistor 17a, the transistor 17a is turned off.

When the transistor 17a0 is turned off, the storage power supply directly supplied from the constant voltage storage power supply unit 3 is supplied to the collector terminal of the transistor 17a via the resistor 17c and the diode 17d. The current is charged to the capacitor 17g connected to the base of the transistor 17f via the contact LR3A1. When the charging of the capacitor 17g is completed (that is, after the low voltage lockout time has elapsed), The programmable unjunction transistor 17h starts to turn on, i.e., when the anode side voltage of the transistor 17h exceeds its gate voltage, a high state signal is output from the cathode of the transistor 17h so that the resistor 17i is provided. The transistors 25c and d configured inside the lockout output section 25 are turned on via the diode 17j. When the transistors 25c and 25d are turned on, the latch relay set coils LO / S are driven. Contact point of control circuit power supply section 24 (L) Turning off OB1) paralyzes the control function of each circuit.

In this way, the automatic switch control section shown in FIGS. 5 and 6 is locked out in the open state (permanently open state), and when the right voltage lockout timing unit 17 is not necessary, a separate selection switch is required. By ON operation by SW2, only the voltage-free lockout timing section 17 may not be used.

This also eliminates the need to lock out the open and close line automatic control section switches at the same time since only the fault section needs to be separated in radial or dendritic applications. On the contrary, it is a very important function in the loop line or composite line, and by opening the lock-out at both ends of the fault section clearly, it is not automatically input even when voltage is applied in the reverse direction, and only the line automatic control section switch at both ends of the fault section is permanently opened.

7 is a block diagram of an apparatus for controlling a combined line automatic switchgear (TFAS) according to another embodiment of the present invention. In the line, the coupled line automatic control switch is operated in the open bar, and the line voltage on the A-power side line 101 is input to the first three-phase voltage input unit 103 through the transformer 102, and the B-power side line The line voltage on the 104 is input to the second three-phase voltage input unit 106 through the transformer 105 to detect each line voltage.

The first three-phase voltage input unit 109 and the second three-phase voltage input unit 106 rectify the voltage signal input through the transformer 102 and 105, respectively, the signal rectified by the first three-phase voltage input unit 103 A part of is provided to the first voltage detector 107, and the other part thereof is input to the constant voltage charging unit 108. In addition, a part of the signal rectified by the second three-phase voltage input unit 106 is provided to the second voltage detector 109, and the remainder is provided to the constant voltage charging unit 108. Here, the first voltage and the second voltage detectors 107 and 109 determine whether or not the voltage of the line is present, and the constant voltage charging unit 108 determines the voltages output from the first three-phase voltage input unit 103 and the second three-phase voltage input unit 106. It is input to charge the capacitor (not shown) necessary for the control circuit, and the charged voltage is provided to the control power supply unit 110 to supply the necessary power to each circuit.

The detection signals from the first voltage detector 107 and the second voltage detector 109 are input to the control logic unit 111 and are coupled to an exclusive NOR. The signal output from the control logic unit 111 is provided to the counter reset timing unit 112, the counter unit 113, the input timing unit 114, and the lockout timing unit 115 to control the logic unit 111. The controller performs controllability according to the presence / absence of voltages on both power supply sides (A-power supply side and b-power supply side). First, however, the counter 113, the input timing 114, the lockout timing 115, and the counter reset timing 112, which are connected to the control logic section 111, can be controlled in sequence. do.

The input timing unit 114 receives the counting output of the counter 113 and the output signal of the control logic unit 111 and performs the input timing. The output signal of the input timing unit 114 receives the input coil 116. Drive the switch 117 of the present control device mechanically coupled.

The lockout timing unit 115 inputs the sequence output signal of the counter unit 113 and the output signal of the control logic unit 111 to proceed with the lockout timing, and outputs the lockout output unit 118 to the lockout timing. The via latch driver 119 is set. At this time, the latch driving unit 119 can turn off the control power supply unit 110 to lock out the coupling line automatic control switch 117 of the present control device in an opened state.

Meanwhile, the counter reset timing unit 112 inputs signals output from the control logic unit 111 and the counter unit 113 to provide a signal to the counter reset unit 120, and the counter reset unit 120 is a constant voltage charging unit. The counter unit 113 may be reset by receiving a signal output from the 108 and the counter reset timing unit 112 and the lockout output unit 118.

In addition, in the closing switch 121, when the coupling line automatic control switch 117 is put into electrical manual operation, the closing coil 117 is put into operation by operating the closing coil 116, and at the same time the lockout output unit 118 ), The latch driver 119 is set by applying a signal, and the switch 117 can be locked out by turning off the control power supply 110 as its output.

The open switch 122 opens the switch 117 by operating the trip coil 123 with a power source directly connected from the constant voltage charging unit 108 when the manual switch 122 is opened by electric manual operation. The control reset switch 124 is connected to the latch driver 119 from the constant voltage charging unit 108 to perform a reset operation, and turns on the control power supply 110 through the reset output of the latch driver 119.

Therefore, all control functions can be operated normally only after the control device is reset by the control reset switch 124.

The operation of the combined line automatic control switch control device configured as described above will be described in detail.

When the automatic control switch 117 of the coupling line is normally operated in the normally open state at the coupling position of both sides of the line, when the back protection is instantaneously operated to eliminate the transient failure due to the failure of the line, once The counter unit 113 performs a one-time counting function by the output of the direct unit 111. At this time, the output of the counter unit 113 is provided to the input timing unit 114 and the lock-wrap timing unit 115, but When the protection device is a recloser, the counter unit 113 only counts operation by one time, and the input timing unit 114 operates by two times, and locks out when counting three times. The timing unit 115 is activated. By the way, when the after-protection device is a circuit breaker, it cooperates with the circuit breaker by selecting a function. The input timing unit 114 operates once, and the lockout timing unit 115 operates twice. Therefore, the counter 113 performs only counting operation and no trip output occurs.

On the other hand, when the coupled line automatic control switch 117 is inserted in the reverse feed, if the failure of the line is not eliminated and the after-protection device blocks the second failure and becomes a power failure, the control of the coupled line automatic control switch 117 Two counting outputs of the counter 113 are provided to the input timing section 114 to operate the input timing section 114. However, if the blackout continues and the permanent failure of the middle of the track is judged, the timing input section 114 is operated to complete the timing input.

The output of the input timing unit 114 is transmitted to the input coil 116 to operate the input coil 116, at which time the coupling line automatic control switch 117 is input due to the operation of the input coil 116.

At the same time as the switch 117 is closed, the controllable lockout process is shown in the closed state. As described above, the output of the closing timing unit 114 is also transmitted to the lockout output unit 118 during the closing operation. The latch driving unit 119 is operated by the operation of the unit 118, and the set output of the latch driving unit 119 morphs the control power supply unit 110, so that the switch 117 is locked out simultaneously with the closing. Done.

Next, the process of locking out in the open state without inputting the fault section shows that when the fault occurs in the line section immediately preceding the switchgear 117, voltage is briefly applied to the line during the closing timing. Since the power failure occurs again, it is determined that the shear section failure of the switch 117 is performed, and the lockout timing unit 115 is operated by the third sequence of the counter 113.

In this case, since the blackout continues, if it is determined that the front end switch 117 is permanently opened, the lockout timing of the switchgear 117 is completed, and the output of the lockout timing unit 115 is provided to the lockout output unit 118. The lockout output 118 provides an output to the latch driver 119. At this time, the set output generated by the latch driver 119 turns off the control power supply 110 so that the control device is locked out.

As a result, the coupling line automatic control switch 117 is to be locked out in the open state without inputting the fault section in the reverse feed. When the lockout is released, the control power supply unit 110 is turned on by a reset operation of the latch driver 119 by manually pressing the control reset switch 124 to perform a control function.

Looking at the process of resetting the counter operation that is in progress when the line is restored to normal during the sequence control by the counting operation, that is, when the voltage is present on both sides of the normally open switch 117 as follows.

In this case, the counter reset timing unit 112 is operated by the output of the control logic unit 111 and the output of the counter unit 113 coupled to the exclusive Noah. Therefore, when both power supply side voltages are continuously maintained and both lines are judged normally at a predetermined timing, the counter reset timing is completed, and the output of the counter reset timing unit 112 is transmitted to the counter reset unit 120. At this time, the counter reset unit 120 is driven and the counter reset unit 120 resets the counter 113 so that the control unit for the combined line control automatic switch 117 is returned to the original initial sequence control state. In addition, the counter reset unit 120 is operated by the lockout output unit 118 to operate the counter unit 113 by the lockout output unit 118 when the lockout is automatically performed in the open state or the closing operation is performed by the electrical manual operation of the input switch unit 121. Will be reset.

Figure 8 shows a detailed circuit diagram of the automatic control device for the combined line switch according to another embodiment of the present invention, the automatic control line for the combined line 117 is normally open, both sides (A-power side, B-power side) ) To detect the voltage. The three-phase line voltage of the A-power side line 101 is input to the first three-phase voltage input unit 103 through an external transformer 102, and the three-phase line voltage of the B-power side line 104 is an external transformer 105. It is input to the second three-phase voltage input unit 106 through.

The first three-phase voltage input unit 103 and the second Samsung input and output unit 106 rectifies the positive pressure signal input through the transformer 102 and 105, respectively, the first three-phase voltage input unit 103 is a respective transformer Step down the voltage signal at (103a, 103b, 103c) and rectify by diodes (103d, 103e, 103f), and rectify by diodes (103g, 103h, 103i), and then the first voltage detector (107) and the constant voltage charger (9108). To each).

In addition, the second three-phase voltage input unit 106 steps down the voltage signal at each of the transformers 106a, 106b, and 106c and rectifies it by the diodes 106d, 106e, and 106f, and by the diodes 106g, 106h, and 106i. It rectifies and provides it to the 2nd voltage detection part 109 and the constant voltage charging part 108, respectively. At this time, the signal input to the constant voltage charging unit 108 is input through the resistor 108a and maintained at a constant voltage by the resistors 108b to 108e, the transistors 108f and 108g, and the zener diode 108h, and through the diode 108h. The constant voltage control power supply can be formed by charging the capacitor 108i and simultaneously charging the capacitor 108l via the capacitor 108l via the diode 108j and the resistor 108k.

On the other hand, the DC voltage signal output from the first three-phase voltage input unit 103 is divided by the resistors 107a and 107b of the first voltage detection unit 107 to condenser 107c the zener diode 107d and the resistor 107e. Is provided to the inverting input terminal of the comparator 107f and compared with the reference voltage level set by the variable resistor 107g and the resistors 107h and 107i.

In addition, the voltage signal output from the second three-phase voltage input unit 106 is divided by the resistors 109a and 109b, and the divided voltage signal divides the capacitor 109c, the zener diode 109d, and the resistor 109e. It is provided to the inverting input terminal of the comparator 109f and compared with the reference voltage level set by the variable resistor 109g and the resistors 109h and 109i.

Accordingly, the outputs of the comparators 107f and 109f of the first and second voltage detection units 107 and 109 of the coupled line automatic control switch control device in the computerized control state (i.e., when a positive voltage is applied in the normally open state). Goes low.

If the power supply of one of the power failures occurs during the instantaneous operation to eliminate the transient failure due to the failure of the line, for example, if the A-power line loses power, the output of the comparator 107f becomes high. In this case, the signal output from the comparator 107f is provided to the control logic section 111 through the diode 107j and the resistor 107k. In addition, when the B-power supply line is out of power, the output of the comparator 109f becomes high, and this output is applied to the control logic section 111 through the diode 109j and the resistor 109k.

Therefore, when one of the two side lines is out of power, either one of the outputs of the first voltage detector 107 or the second voltage detector 109 becomes high. If the output of the comparator 107f is high, the signal divided by the resistor 107k and the resistor 111a is provided to one side of the NAND gate 111c through the capacitor 111b to the separate terminal and at the same time the NAND gate ( It is also provided to one input terminal of 11d). On the other hand, the output of the comparator 109f is kept low, and the low state signal passing through the resistor 111e and the condenser 111f is provided to one input terminal of the NAND gate 111g, and at the same time the NAND gate 111a. Is provided on the other input terminal. At this time, the NAND gate 111C generates a high state signal, and also outputs a high state signal. In this case, the NAND gate 111d logically combines the high output of the NAND gate 111c and the signal output high by the first voltage detector 107 to output a low state signal. Therefore, the NAND gate 111h logically combines a low state signal, which is an output of the NAND gate 111h, and a NAND gate 111g, with a signal of which the output of the NAND gate 111g is high to output a high state signal. In the case where the output of the comparator 107 is low and the output of the comparator 109 is high, the NAND gate 111c and the NAND gate 111g output high signals in the same manner as described above. Since the low signal is generated, the NAND gate 111h outputs a high state signal. Therefore, when either output of the first or second voltage detection unit 107 or 109 remains high, a different signal is input to the input of the exclusive NOR coupled control logic unit 111, so that the NAND The output signal of the gate 111h goes high.

The high signal output from the NAND gate 111h turns on the transistor 111l through the capacitor 111i and the resistors 111j and 111k. When the transistor 111l is turned on, its collector potential becomes low, and a low state signal is also applied to the base of the transistor 113b through the resistor 113a configured inside the counter portion 113, so that the transistor 113b is turned off. do. When the transistor 113b is off, its collet potential becomes high, so that a current flows through the resistor 113c to the capacitor 113d, and a pulse signal is provided to the transistor 113f via the resistor 113e. The transistor 113f is turned on.

As the transistor 113f is turned on and off once by the pulse signal, the relay coil RS is turned on and off once. As soon as the relay coil RS operates, the contact RSA1 is turned on and the contact is turned on. (REB1) is turned off. At this time, the relay coil RY1 is excited and the relay coil RY1 self-holds by the contact RYA1. At the same time, since the contact RY1A2 is turned on, a current flows in the base of the transistor 111i via the resistors 113g and 111h so that the transistor 111i is turned on so that the contact RY1A2 and the non-protective device selector switch SW1 are turned on. The power source is bypassed to ground through the collector-emitter of transistor 113i via and resistor 113j. When the transistor 113i is turned on, its collector becomes low so that a current signal is not applied to the coupling capacitor 113k.

Meanwhile. The moment when the relay contact RSA1 is turned on and off (at this time, the contact RSB1 is turned off and on), a low state signal is applied to the base of the transistor 113i, so the transistor 113i is turned off.

As the transistor 113i is turned off, the transistor 113m is turned on via the capacitor 113k and the resistor 113l by a power source passing through the contact RY1A2, the switch SW1, and the resistor 113j. At this time, due to the turn-on operation of the transistor 113m, the latch relay set coil LRI / S is operated, the contact LR1A1 is turned on, and the contact LR1B1 is turned off. Therefore, the reset coil of the counter reset unit 120 is normally operated. As long as (LR1 / R) is not driven, the set state is maintained and the next sequence is prepared to perform one counting operation. As a result, the counter 113 is only counted once and the switch 117 of the control device is not opened.

Next, when the coupling line automatic control switch 117 undergoes the second power failure, the operation of the timing operation after the one-time counting operation is performed as described above.

First, as described above, when the relay coil RY2 is self-holding by the on operation of the relay contact RSA2 of the counter 113 and the off operation of the contact RBS1, when the relay coil RY2 is excited, The contact RY2A2 is turned on, and a high state signal is applied to the base of the transistor 113p via the resistor 113n via the resistor 113g. In addition, the voltage signal passing through the contact RY2A2 is applied to the collector of the transistor 113p via the resistor 113q. At this time, since the transistor 113p is turned on, the capacitor 113r discharges. In this case, the ground bottom RSA2 is turned off, and since the contact RSB1 is turned on, a low bias is applied to the resistor 113n connected to the base of the transistor 113p and the transistor 113p is turned off.

When the transistor 113p is turned off, its collector becomes high, and a signal via the contact RY2A2 is applied to the resistor 113s through the resistor 113q and the capacitor 113r to turn on the transistor 113t.

Due to the turn-on action of the transistor 113t, the latch relay set coils LR1 / S are operated and the transistor 120b is turned on via the resistor 120a of the counter recess 120. When the transistor 120b is turned on, the latch release reset coils LR1 / R operate, and the operation of the latch relay set coils LR2 / S is applied by turning off the contact LR2B2 of the input timing unit 114. The timing unit 114 may be driven. At the same time, the operation of the latch relay reset coils LR1 / R of the counter reset unit 120 resets the counter memory once.

Therefore, since the collector side of the control logic section 111 is in a low state during the second line blackout, the timing timing section 114 is turned off, and its output is in a high state.

Since the collector side of the transistor 114a is high and the contact LR2B2 is off, a voltage is charged to the capacitor 114e via the base of the transistor 114d via the resistor 114c. However, the power outage of the line continues and the voltage discharged from the resistors 114c and 114e is provided to the non-inverting input terminal of the comparator 114g via the resistor 114f. At this time, the comparator 114g compares the input voltage level with the reference voltage level set by the inverting input terminal. When the input voltage is greater than the reference voltage, the comparator 114g outputs a signal in a high state and passes through the resistor 114h. The transistor 114i is turned on.

When the transistor 114i is turned on, the relay coil RR4 operates to turn on the contact RR4A1. Accordingly, the voltage signal via the subsidiary contact MB1 of the coupling line automatic control switch 117 is connected to the contact RR4A1. The input coil 116 is driven through the diode D1. Therefore, the coupling line automatic control switch 117 can be input in the reverse feed.

Referring to the control function lockout process at the same time as the switch 117 is inputted, as described above, the closing operation is performed by the on operation of the contact RA4A1 or the manual operation of the closing switch 121 by the diode of the lockout output unit 118 ( The voltage is also applied to the resistor 118b via 118a. At this time, the transistor 118c is turned on to operate the relay coil RO. In this case, the latch relay set coil LO / S is operated by turning on the contact ROA1 of the latch driver 119. When the latch relay set coil LO / S is operated, the contact point LOB1 of the control power supply unit 110 is turned off, so that the power supply of each control circuit supplied from the control power supply unit 110 is cut off and the control function is paralyzed. This state is also stored by the reset switch 124 of the latch driver 119 until the latch relay reset coil LO / R is driven and reset.

On the other hand, when the coupling line automatic control switch 117 is applied with the voltage again during the second input timing, and the third power failure occurs, the lock line timing is performed after the third counting operation by operating as the second counting operation. Let's look at.

When the voltage is applied again while the timing is in progress, the transistor 111l of the control logic section 111 is turned off, so that the collector side thereof becomes high. Thus, the transistor 114 is connected to the transistor 114 through the resistance 114b of the timing timing 114. 114a is turned on, and its collet side is high, and the voltage of the capacitor 114e that is being charged is bypassed to ground through the collector-emitter of the transistor 114a through the diode 114j and the comparator 114g is low. Since the transistor 144i is turned off by generating a signal having a state, the input timing unit 114 is reset. At this time, the relay contact RR4A1 is opened so that the input coil 116 does not operate unless the input switch 121 is manually pressed so that the switch 117 does not open and performs only a counting operation.

At this time, when the line is again interrupted for the third time, the relay coil RY3 is self-holding by operating similarly as described above to the ON operation of the relay contact RSA3 of the counter 113 and the OFF operation of the contact RSB2. do.

When the relay coil RY3 is excited, the contact RY3A2 is turned on and the transistor 113V is turned on via the resistor 113u. When the transistor 113V is turned on, the signal through the contact RY3A2 and the resistor 113W is bypassed to the ground through the collector-emitter of the transistor 113V, so that the contact point in the state where the coupling capacitor 113x is discharged. The transistor 113V is turned off as the RSA3 is turned off and the contact RSB1 is turned on.

When the transistor 113V is turned off, the collector side is in a high state. At this time, a current flows through the resistor 113w through the resistor 113w through the contact RY3A2. The pulse signal at this time turns on the transistor 113y via the resistor 113y to drive the latch relay set coil LR3 / S, and simultaneously turns on the transistor 120d through the resistor 120c of the counter reset unit 120. Drive the latch relay reset coil (LR2 / R).

The operation of the latch relay set coil LR3 / S turns off the contact LR3B2 of the lockout timing unit 115. When one power supply side is in a power failure state, the transistor 111l of the control logic unit 111 is turned on. Its collector side goes high.

At this time, since the transistor 115b0 is turned off via the resistor 115a of the lockout timing unit 115, a voltage is charged to the capacitor 115e through the base of the transistor 115d via the variable resistor 115c. After a time has elapsed, a non-inverting terminal of the comparator 115h is inputted with a load voltage of the condenser 115e through the diode 115f and the resistor 115g, and the input voltage is supplied to the resistors 115i and 115j. When the reference voltage is higher than the reference voltage, the comparator 115h outputs a high state signal.

The high signal output from the comparator 115h turns on the via transistor 118c via the diode 115k through the resistor 118b of the lockout output 118. When the transistor 118c is turned on, the relay coil RO is operated and thus the contact ROA1 of the latch driver 119 is turned on to operate the latch relay set coil LO / S.

As the contact point LOB1 of the control power supply unit 110 is turned off by the operation of the latch relay set coil LO / S, the power of each control circuit is cut off and the control function is shut down. Locked out. As described above, the lockout is released until the reset switch 124 is turned on to drive the latch relay reset coil LO / R so as to be stored until reset.

In the process of resetting the counting operation in progress when the line is restored to normal during the counting operation due to the counting operation, that is, when the voltage is normally present on both lines, the control logic unit 111 because both power supplies exist. A low signal is applied to one input terminal of the NAND gates 111c, 111d, and 111g of the NAND gate. However, since the low signal is applied to the other input terminal of the NAND gate 111c, the NAND gate 111c is high. The signal of the state is output and provided to the other input terminal of the NAND gates 111d and 111g. At this time, the NAND gate 111d outputs a high state signal, and the NAND gate 111g also outputs a high state signal to provide to both input terminals of the NAND gate 111h. The NAND gate 111h receives these two signals. Is combined to output a low signal and applied to the base of the transistor 111l through the resistor 111k, but the transistor 111l remains off. When the transistor 111l is turned off, its collet is applied with a high voltage signal voltage through the resistor 111m. This voltage turns on the transistor 112b via the resistor 112a in the counter reset timing unit 112. Let's do it.

When transistor 112b is turned on, transistor 112c connected to its collector side is turned off. Therefore, one of the contacts LR1B1, LR1B1, and LR3B1 of the collector side voltage of the transistor 112c and the counters 113 is kept in the OFF state, and thus the transistor is passed through the variable resistor 112d of the counter reset timing unit 1120. The capacitor 112f is charged with a voltage through the base of 112e.The voltage charged by the capacitor 112f after a predetermined time has passed through the diode 112g and the resistor 112h of the comparator 112i. When the input voltage is higher than the reference voltage, the comparator 112i outputs a high state signal to turn on the transistor 112k through the resistor 112j. When the transistor 112k is turned on, the non-inverting input terminal is provided. The relay coil RR3 is operated, and at this time, the contact RR3A1 of the counter reset unit 120 is turned on, and accordingly, the latch relay reset coils LR1 / R, LR2 / R, and LR3 / R are operated at the same time. All reset and normal control of the counter 113 State can be reduced.

In addition, the counter reset operation is performed when the relay coil RO of the lockout output unit 118 is driven for the lockout operation, so that the reset coils LR1 / R, The LR2 / R and LR3 / R operate so that the counter 113 can be reset as described above.

As described above, the control coordination method of the system control apparatus (SFAS, TFAS) of the present invention cooperates with the leaf protector (Rec) or the circuit breaker (CB), which is a back protection device, to subdivide the section to the maximum in any type of line operation method. It is easy to use because it is easy to correct and does not repeat unnecessary power outages and operations of the health line, thus contributing to service improvement by economical and quicker line return.

In particular, it only subdivides the coordination ability and fault section for eliminating transient faults, and the return of the power line can be automatically solved by the switch itself, so the control of the line switch is emerging as a short side of the power line carrier method for distribution automation. It has a feature that can provide a method to solve the problem of algorithm processing problem and communication means disadvantage.

Claims (19)

Cooperating to eliminate transient failures with counting operations regardless of the instantaneous reclosing time of the dodging protection device; Confirmation at the time of permanent failure elimination During the closing process, the operation section is not opened again and does not perform unnecessary operation. Automatically open and close the radial line, characterized in that the control operation. Cooperating to eliminate transient failures with counting operations regardless of the instantaneous reclosing time of the dodging protection device; Confirmation in case of permanent fault removal In the process of closing, the open section of the healthy section is reopened and do not perform unnecessary operation. Not opening; Confirmation in case of permanent fault removal When removing fault section of branch line which has failed in the input process, open the switch section of other branch line again and open only the breaker section of the faulted branch line. A method for automatically opening and closing a dendritic line, characterized in that the control operation is performed at the stage of judging the faulty line by locking out the fault section and separating the faulty line. Steps for coordinating the elimination of transient faults by counting operation regardless of the instantaneous reclosing time of the rear protection device: Confirmation during permanent fault elimination. Not opening the switchgear of the already-loaded healthy section again by separating the permanent failure section by only opening the switchgear of the switchgear; If there is a failure in the section directly connected to the normally open coupling switchgear, it is not automatically fed back in. If it is a fault in other line sections, it automatically inputs a fault line at the time of return. Judgment step and: Automatic loop opening and closing method of the loop on the loop characterized in that the control operation is operated in a step so that the line protection coordination is normally performed even after the reverse transmission by maintaining the normal control function of the switchgear of the healthy line input by the reverse transmission. Cooperating with the pick protection device to eliminate transient failures by counting operations regardless of the instantaneous reclosing time of the pick protection device; Confirmation in case of permanent fault elimination During the closing process, the switch section is opened again without any unnecessary operation. Wow; Confirmation in case of permanent fault removal When removing fault section of branch line which failed in the input process, open the switch section of other section line and open only the switch section of fault section of the faulted branch line Determining a fault line by locking out to isolate the fault section and not reopening the switch of the sound breaker line; If there is a failure in the section directly connected to the normally open coupling switch, it does not automatically feed back, but in the case of a failure in other line sections, it automatically separates only the fault section and then inputs a fault line at the time of return. Determining whether and: maintaining the normal control function of the switchgear of the healthy line inputted in the reverse transmission so that the line protection coordination is normally performed even after the reverse transmission; A method for automatically opening / closing a composite line, characterized by an automatic switching control operation method for coordinating line protection. An apparatus for sensing a voltage of a line and controlling a switch line automatic section switch by timing coordination; Voltage and current suppression means for sensing voltage and current at the same time to suppress voltage and current; Fault current construction means for sensing a current state of the line; Operation means for resetting to normal after only one counting operation without opening or closing the switch when a power failure occurs in a state in which a successful failure is applied during the removal and confirmation of the transient failure; Counter reset operation means for resetting coefficient storage upon normal return of the line after the counting operation by said counting means; Inrush current suppressing means for preparing for inrush current when the normal line is input; Coefficient open operation means which is opened immediately and is not locked neighbors when the corrected coefficient operation is completed; Automatic input suppression means for sensing the voltage on both sides of the line to suppress the input when both power supply in the open state; Sequence timing input means which is input after completion of the input timing when voltage is applied again when it is opened after the counting operation; A one-time open lockout means which is not opened when the current is a normal current when the power is interrupted during the lockout timing after the input, and is opened and locked out only once in case of a fault current; An open lockout means for locking out after timing progress in an open state once the voltage is applied and once the voltage is applied during the input timing progression operation, if no voltage is maintained after the coefficient open, it does not immediately proceed to the lockout operation; Switching line automation section switchgear characterized in that it is composed of a non-operational timing means which is turned on in the case of cooperating with the circuit breaker by the selection switch and is not opened once when the normal line is outageed during the sequence coordination process of the line after the lockout timing is completed. Control unit. 6. The voltage current suppressing means according to claim 5, wherein the voltage current suppressing means includes a voltage signal of the voltage detecting unit 120 for detecting the voltage of the three-phase line and a current signal of the phase / ground fault line current monitoring unit 2 for monitoring the phase and ground fault line currents. And a voltage / current suppressor 7 for controlling necessary for the operation of the opening portion 19, the inrush current suppression portion 6 and the counter portion 20 depending on the presence of the voltage and current of the line. Switchgear control device of the distribution line automatic section characterized in that consisting of. 6. The fault current detecting means according to claim 5, wherein the fault current detecting means charges a voltage path proportional to the fault current of the line to suppress the voltage / current suppressing portion 7 above, and at the time of occurrence of a power failure, the opening portion 19 Distribution circuit automation section switchgear control device, characterized in that consisting of a phase-ground fault current detection unit (5) for operating. 6. The counting operation means according to claim 5, wherein the counting operation means releases the signal of the voltage / current suppressing portion 7 at the time of power failure of the line and receives only the scaling control power supplied from the auxiliary contact portion 23 to perform only one counting operation. Distribution line automation section switchgear control device characterized in that consisting of a counter 20. 6. The method of claim 5, wherein the coefficient opening operation means has a trip output unit after completion of counting by the second output of the counter unit 20 when the line is returned after the completion of the counted counting operation and the power is cut again. A switchgear control device for a distribution line automation section, characterized in that it is configured as an open driver (21) for driving the trip coil (27) by the output of 22) to remodel the switch (28). 6. The counter reset operation means according to claim 5, wherein the counter reset operation means inputs the ON voltage output of the voltage detection unit 12 and the control power in the input state via the auxiliary contact unit 23 as input. And a counter reset timing section (17) which causes the open drive section (21) to reset the counter section (20) after completion of the set timing. 6. The inrush current suppressing means according to claim 5, wherein the inrush current suppressing means receives an output of the voltage / current suppressing portion 7 when the line is out of power in a normal current state, and provides a latch signal to the phase / ground fault current detecting portion 5. Power supply line, characterized in that the inrush current suppression unit 6 performs a function of suppressing inrush current by inhibiting current detection for a predetermined time after the subsequent input of the switch 28 by paralyzing a fault current detection function. Automation section switch control device. 6. The input according to claim 5, wherein the automatic input suppressing means operates by the output sensed by the three-phase line positive voltage input section 4 when the automatic input suppressing means is present in the voltage movement of both lines in the open state after completion of counting. An apparatus for controlling an automatic switchgear for distribution lines, comprising: a timing section (13) and an input driver (14) interlocked by the output of the three-phase line voltage input section (4). 6. The switch according to claim 5, wherein the sequence timing input means is operated by a signal generated when an input signal is provided to the input driver 14 when the input timing is processed by the input timing part 13. Distribution line automation section switchgear control device characterized in that consisting of an input coil (29) for injecting. The control circuit power supply unit of claim 5, wherein the open lockout means receives a signal output from the open driver 21 and the open driver 21, which are opened and reset by an electrically operated manual switch. 24. An automatic switchgear control device for a distribution line automation section, characterized in that the lockout output section (25) turns off. 6. The voltage-current suppressing portion (7) according to claim 5, wherein the one-time open lockout means is provided to the voltage / current suppressing portion (7) by a fault current charged in the phase-and-ground fault current detecting portion (5) when a power failure occurs during lockout timing. Lock-out timing which causes the opening unit 19 to be operated once by the fault current detection delay signal charged to the phase-fault fault current detection unit 5 by turning off the counter unit 20 at the time of power failure of the line. Switchgear automatic switchgear control device characterized in that it comprises a portion (16). 6. The operationless timing means according to claim 5, wherein the operationless timing means is constituted by an operationless timing portion 26 for preventing the operation of the counter portion 20 and the one-time opening portion 19 after completion of the lockout timing. Distribution line automation section switchgear control device. An apparatus for sensing a voltage of a line and cooperatively counting operation and timing at the same time to control a switch for automatic rewire line coupling; Counting operation means for cooperative sequence upon elimination of excessive failure of the dobby protection device; Automatic input operation means for simultaneously controlling the sequence and timing at the same time by the cooperative selection of the rear guard device to continue the power failure of one line after a predetermined number of counting operations, and then input after completion of the input timing to recover the soundness section; If the voltage lost during the input timing is recovered, and the power failure occurs before the sequence reset, the lockout timing proceeds, and the lockout is performed in the open state after completion of the timing due to the duration of the power failure. Open state lockout means for preventing; Switchgear control device for automatic distribution line distribution, characterized in that the circuit is configured by a sequence reset means for returning from the open state to the normal control state after completion of the reset timing when the lost voltage is recovered during the sequence progress. 18. The method of claim 17, wherein the automatic input operation means performs a first counting operation when the post-protection device is a circuit breaker so that a power failure of one of the lines is continued, and is input after completion of the input timing to recover the healthy section. Switchgear control device for the distribution line automatic coupling characterized in that the control box. 7. The automatic input operation means according to claim 6, wherein the automatic input operation means counts the second time when the rear protection device is a recloser so that power failure of one of the lines is continued, and after completion of the input timing, the sequence and timing are restored to recover the healthy section. Switchgear control device for the distribution line automatic coupling characterized in that the control box.