CN109995010B - Automatic control method and system for induced current quick release device - Google Patents

Automatic control method and system for induced current quick release device Download PDF

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Publication number
CN109995010B
CN109995010B CN201910353192.7A CN201910353192A CN109995010B CN 109995010 B CN109995010 B CN 109995010B CN 201910353192 A CN201910353192 A CN 201910353192A CN 109995010 B CN109995010 B CN 109995010B
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current
voltage
line
automatic control
pipe gallery
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CN109995010A (en
Inventor
王玉龙
谢华
赵青春
陆金凤
李奔
戴光武
张宇驰
张春合
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/08Limitation or suppression of earth fault currents, e.g. Petersen coil

Abstract

The invention discloses an automatic control method of an induced current quick release device, which comprises the following steps: judging whether circuit breakers at two ends of a line are in a position division mode, and whether the circuit breakers are in no voltage and no current; judging whether the voltages and currents at two ends of the corridor in the circuit are low in voltage and low in current or not and judging whether the disconnecting link is in a disconnection state or not; judging whether the line protection of the pipe gallery in the line is operated; and if the comprehensive judgment condition is met, the knife switch of the induced current quick release device on the corresponding side of the pipe gallery is automatically controlled through a certain time delay. The invention also discloses an automatic control system of the induced current quick release device. The device can automatically control the closing induction current quick release device when a fault occurs in the power transmission line pipe gallery, improves the automation level and the rapidity of induction current release, avoids the risk of breakdown of pipe gallery components caused by untimely release of the induction current generated by the operation line of the fault line pipe gallery, and simultaneously brings safety guarantee for maintenance.

Description

Automatic control method and system for induced current quick release device
Technical Field
The invention belongs to the field of power systems and automatic control thereof, and relates to an automatic control method and system for an induced current quick release device.
Background
The construction of the power transmission line in a double-circuit or multi-circuit mode is widely applied to practical engineering, limited power transmission corridor resources can be fully utilized, the occupied area is reduced, and the power transmission capacity of a power system is greatly improved. But in the laying process of some existing power transmission lines, the power transmission lines need to pass through tunnels and closed GIL pipe galleries because of passing through the river or the sea. When the piping lane section breaks down, the line protection of piping lane section though can jump, but the back is jumped to both sides circuit breaker three-phase, because the other one or many return lines of power transmission line normal operating its electric capacity and inductive coupling effect, can produce certain induced voltage in the fault line and make the fault point can have lasting induced-current, can puncture the piping lane under induced-current's long-time effect to confined piping lane, causes serious consequence.
Considering the influence of the induced current on the closed pipe gallery, the quick induced current release device is arranged at the two ends of the pipe gallery to discharge in practical engineering, namely the induced current release is realized by closing the grounding knife switches at the two ends of the pipe gallery after the closed pipe gallery is in fault.
Aiming at the problem of induced current release control, the common solution is to manually control the closing of an induced current release device through a remote master station background or a local mechanism by manually combining the position of a fault point, but the closing control cannot be automatically completed by combining the actual condition of a line, but the method can increase the on-site working link, increase the possibility of manual misoperation and the like, and influence the protection reliability.
Disclosure of Invention
Aiming at the problems, the invention provides an automatic control method and system for an induced current quick release device, which can automatically control the induced current quick release device to be quickly switched on according to the line condition after the line pipe rack fails, and can improve the safety of the pipe rack.
In order to achieve the technical purpose, the invention is realized by the following technical scheme: an automatic control method of an induced current quick release device comprises the following steps:
step 1, collecting the position of a circuit breaker, the voltage of a circuit and the current of the circuit at two ends of a power transmission line respectively;
step 2, judging whether circuit breakers at two ends of a line are in a position division mode, and whether the circuit breakers are in no voltage and no current;
step 3, respectively collecting the positions of circuit voltage, circuit current and induced current quick release device disconnecting links at two ends of a pipe gallery in a circuit;
step 4, judging whether the voltages and currents at two ends of the pipe gallery in the circuit are low in voltage and low in current or not, and judging whether the disconnecting link is in a separating position or not;
step 5, judging whether the line protection of the pipe gallery in the line is operated;
and 6, if the conditions that the two sides of the line jump without current and pressure, the two sides of the pipe gallery are low in voltage and low in current, the disconnecting link of the induced current quick release device on one side of the pipe gallery is disconnected, and the line of the pipe gallery on the side is protected to act, the automatic closing of the disconnecting link of the induced current quick release device on the side is controlled through preset time delay.
Further, in the step 1: the two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line isCurrent isLine N side voltage is Current is
The specific criterion for judging whether the line is non-pressure and non-flow in the step 2 is as follows:
the following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: u shapeset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
Further, the two ends of the pipe gallery in the step 3 are respectively a K side and an L side, and the collected voltage of the K side of the pipe gallery isCurrent isThe L side voltage of the pipe gallery isCurrent is
The specific criterion for judging whether the voltages and currents at two ends of the pipe gallery in the line are low-voltage and low-current in the step 4 is as follows:
satisfy following condition, judge piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the pipe gallery are judged:
wherein: u shapeset2、Iset2Respectively the low voltage threshold and the low current threshold at the two ends of the pipe gallery.
Furthermore, the two ends of the power transmission line are M, N sides respectively, and when the collected positions of the circuit breakers are two-point positions, three-phase opening and closing signals of the circuit breaker on the M side of the line are T respectivelyMA、TMB、TMC、HMA、HMB、HMCThen, the circuit splitter position division determination criterion in step 2 is: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0;
When the collected circuit breaker position is a single-point position, the circuit breaker position division judgment criterion in the step 2 is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
Further, the pipe gallery both ends are K side, L side respectively, and when the induced-current quick release device switch position of gathering was the double position, the induced-current quick release device switch triphase was divided, the signal that closes of pipe gallery K side induced-current release device switch was T respectivelyKA、TKB、TKC、HKA、HKB、HKCThe L-side circuit breaker of the pipe gallery is divided and closed by signals respectively TLA、TLB、TLC、HLA、HLB、HLCAnd if so, the criterion for judging the disconnecting link separating position in the step 4 is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0;
When the collected position of the knife switch of the induced current quick release device is a single-point position, the criterion for judging the position of the knife switch in the step 4 is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
And further, both sides of the power transmission line pipe gallery are provided with induced current quick release devices, and the two sides are respectively automatically controlled to be switched on according to the step 6.
The invention also provides an automatic control system of the induced current quick release device, which comprises two automatic control main machines and two automatic control auxiliary machines, wherein the automatic control main machines are respectively arranged at two ends of the pipe gallery, and the automatic control auxiliary machines are respectively arranged at two ends of the line;
the automatic control auxiliary machines at two ends of the line respectively collect the positions of circuit breakers at two ends of the line, line voltage and current; the automatic control auxiliary machine transmits the collected breaker position, line voltage and current to the automatic control host at two ends of the pipe gallery through optical fibers at the same time, and the automatic control host judges whether the breakers at two ends of the line are separated, and whether the breakers are non-pressure and non-current; or the automatic control auxiliary machine carries out circuit breaker position division judgment and circuit no-voltage and no-current judgment on the collected circuit breaker positions at two ends of the circuit, the collected circuit voltage and the collected circuit current, and then transmits the judgment result to the automatic control main machines at two ends of the pipe gallery through optical fibers;
the automatic control host at two ends of the line pipe gallery respectively collects line voltage and current at two ends of the pipe gallery and the position of the knife switch of the induced current quick release device;
the automatic control host at each end transmits the collected line voltage and current of the pipe gallery at the local side to the automatic control host at the opposite end of the pipe gallery through optical fibers, the automatic control host at the local end receives the analog quantity of the automatic control host at the opposite end and then judges the line voltage and current at the two ends of the pipe gallery in the line at low voltage and low current, and the automatic control host at each end judges whether the disconnecting link at the local end is positioned or not; or, the automatic control host at each end respectively judges the line voltage and the line current at each end of the collected line pipe gallery at low voltage and low current of the line, the judgment result is transmitted to the automatic control host at the opposite end of the pipe gallery through optical fibers, and the automatic control host at each end respectively judges whether the disconnecting link at the end is positioned;
the automatic control host receives a protection action signal of the local side pipe gallery circuit;
if judge through the automatic control host computer, satisfy the circuit both sides and jump the position and have not flowed, the non-pressure, the low-voltage undercurrent of piping lane both sides, the induced-current quick release device switch of piping lane one side divides the position, and this side piping lane circuit protection action, then the automatic control host computer is through presetting the automatic combined floodgate of the switch of the induced-current quick release device of time delay control this side piping lane.
Further, in the automatic control system, the specific criterion for the line no-pressure no-flow judgment is as follows:
the following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: the two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line is Current isLine N side voltage isCurrent is
Uset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
Further, in the automatic control system, the specific criterion for determining the low-voltage and low-current of the line is as follows:
satisfy the followingPiece, judge piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the pipe gallery are judged:
wherein: the two ends of the pipe gallery are respectively K side and L side, and the collected K side voltage of the pipe gallery isCurrent isThe L side voltage of the pipe gallery isCurrent isUset2、Iset2Respectively the low voltage threshold and the low current threshold at the two ends of the pipe gallery.
Furthermore, in the automatic control system, two ends of the transmission line are M, N sides respectively, and when the collected position of the circuit breaker is a double-point position, three-phase opening and closing signals of the circuit breaker on the M side of the line are T respectivelyMA、TMB、TMC、HMA、HMB、HMCAnd the circuit breaker position division judgment criterion is as follows: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0;
When the collected circuit breaker position is a single-point position, the circuit breaker position division judgment criterion is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
Further, among the above-mentioned automatic control system, the piping lane both ends are K side, L side respectively, and when the induced-current quick release device switch position of gathering was the double-point position, the piping lane K side induced-current release device switch triphase was divided, the signal that closes is T respectivelyKA、TKB、TKC、HKA、HKB、HKCThe L-side circuit breaker of the pipe gallery is divided and closed by signals respectively TLA、TLB、TLC、HLA、HLB、HLCAnd the criterion for judging the separation position of the disconnecting link is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0;
When the collected position of the knife switch of the induced current quick release device is a single-point position, the criterion for judging the position of the knife switch is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
The invention has the beneficial effects that:
the technical scheme provided by the invention is simple and clear, can eliminate the influence of normal operation of the other one or more loops of the power transmission line on the induced voltage and current after the pipe gallery breaks down, and can quickly and automatically control the closing of the induced current release device, so that the safety of the pipe gallery is ensured.
Drawings
FIG. 1 is a logic diagram of an automatic control method of an induced current quick release device according to the present invention;
fig. 2 is a schematic view of an automatic control system of the induced current quick release device of the present invention.
Detailed Description
The present invention will be better understood and implemented by those skilled in the art by the following detailed description of the technical solution of the present invention with reference to the accompanying drawings and specific examples, which are not intended to limit the present invention.
A specific embodiment 1 of an automatic control method of an induced current quick release device, as shown in fig. 1, includes the following steps:
step 1, collecting the position of a circuit breaker, the voltage of a circuit and the current of the circuit at two ends of a power transmission line respectively.
The two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line isCurrent isLine N side voltage isCurrent isThree-phase opening and closing signals of the circuit breaker on the M side of the circuit are respectively TMA、TMB、TMC、HMA、HMB、HMC
And 2, judging whether circuit breakers at two ends of the line are separated, and whether the circuit breakers are non-voltage and non-current.
The following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: u shapeset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
The circuit breaker position division judgment criterion is as follows: when the collected circuit breaker position is at the double-point position, the circuit breaker position division judgment criterion is TMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC0. When the collected circuit breaker position is the single-point position, the circuit breaker position division judgment criterion is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
And 3, respectively collecting the positions of the circuit voltage, the circuit current and the induced current quick release device disconnecting link at two ends of the pipe gallery in the circuit.
The two ends of the pipe gallery are respectively K side and L side, and the collected K side voltage of the pipe gallery isCurrent isThe L side voltage of the pipe gallery isCurrent isThe three-phase separation and combination signals of the disconnecting link of the induced current releasing device on the K side of the pipe gallery are respectively TKA、TKB、TKC、HKA、HKB、HKCThe L-side circuit breaker of the pipe gallery is divided and closed by signals respectively TLA、TLB、TLC、HLA、HLB、HLC
And 4, judging whether the voltages and currents at two ends of the pipe gallery in the circuit are low in voltage and low in current or not, and judging whether the disconnecting link is in a separated position or not.
Satisfy following condition, judge piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the pipe gallery are judged:
wherein: u shapeset2、Iset2Respectively the low voltage threshold and the low current threshold at the two ends of the pipe gallery.
The criterion of the disconnecting link separation is as follows: when the collected position of the knife switch of the induced current quick release device is a double-point position, the criterion for judging the position of the knife switch is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0;
When the collected induced current quick release device switch position is a single point position, the switch separation discrimination criterion is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
And 5, judging whether the line protection of the pipe gallery in the line is operated.
And 6, if the conditions that the two sides of the line jump without current and pressure, the two sides of the pipe gallery are low in voltage and low in current, the disconnecting link of the induced current quick release device on one side of the pipe gallery is disconnected, and the line of the pipe gallery on the side is protected to act, the automatic closing of the disconnecting link of the induced current quick release device on the side is controlled through preset time delay. And (4) installing induced current quick release devices on two sides of the power transmission line pipe gallery, and automatically controlling closing on two sides according to the step 6.
Referring to fig. 2, a specific embodiment 2 of the method for automatically controlling an induced current fast release apparatus according to the present invention is described, which includes the following steps:
step 1, collecting the position of a circuit breaker, the voltage of a circuit and the current of the circuit at two ends of a power transmission line respectively, wherein the three-phase separation and combination of the circuit breaker at the M side of the circuit is TMA、TMB、TMC、HMA、HMB、HMCAt a voltage of Current isThe circuit breaker on the N side of the line is divided and combined into TNA、TNB、TNC、HNA、HNB、HNCAt a voltage ofCurrent is
Step 2, judging whether circuit breakers at two ends of the line are separated, and whether the circuit breakers are non-voltage and non-current:
1) circuit breaker divides the position to differentiate: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0。
2) Judging whether the line voltage is no voltage:
3) judging whether the line has no flow:
step 3, respectively collecting the positions of the circuit voltage, the circuit current and the induced current quick release device disconnecting link at the two ends of the pipe gallery in the circuit, wherein the three-phase separation and combination of the induced current release device disconnecting link at the K side of the pipe gallery is TKA、TKB、TKC、HKA、HKB、HKCAt a voltage ofCurrent isThe L-side breaker of the pipe gallery is divided and closed into TLA、TLB、TLC、HLA、HLB、HLCAt a voltage ofCurrent is
Step 4, judging whether the voltage and the current of the two ends of the pipe gallery in the line are smaller than threshold values and whether the disconnecting link is in a separating position:
1) and (3) disconnecting link separating position judgment: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0。
2) And (3) judging the low voltage on two sides of the pipe gallery:
3) and (3) judging low currents on two sides of the pipe gallery:
step 5, judging whether the line protection of the pipe gallery in the line is operated; and after the line protection of the pipe gallery is performed, an action signal is correspondingly sent to the host.
And 6, if the conditions that the two sides of the line jump without current and pressure are met, the two sides of the pipe gallery are subjected to low-pressure and low-current, the disconnecting link of the releasing device on one side of the pipe gallery is separated, the pipe gallery corresponds to side line protection action, and the disconnecting link of the induced current quick releasing device on the corresponding side of the pipe gallery is automatically controlled to be switched on through certain time delay.
For a K-end host of a pipe gallery, judging that the M end and the N end of a line jump and no current (T)MA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0,All less than 0.06In, 0.06In being no-current threshold), voltageAre all less than 30V, and 30V is a non-voltage threshold; piping lane K and L end line voltageAre all less than 30V, and 30V is low voltage threshold and currentAre all less than 0.2In, 0.2In is a low current threshold; the pipe gallery K-end disconnecting link is divided (T)KA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC0), receive pipe gallery K end line protection action in addition, then act after certain delay. The same logic is applied to the automatic control at the L end.
The invention also provides a specific embodiment of the automatic control system of the induced current quick release device, which comprises two automatic control main machines and two automatic control auxiliary machines, wherein the automatic control main machines are respectively arranged at two ends of the pipe gallery, and the automatic control auxiliary machines are respectively arranged at two ends of the line.
The automatic control auxiliary machines at two ends of the line respectively collect the positions of circuit breakers at two ends of the line, line voltage and current; the automatic control auxiliary machine transmits the collected breaker position, line voltage and current to the automatic control host at two ends of the pipe gallery through optical fibers at the same time, and the automatic control host judges whether the breakers at two ends of the line are separated, and whether the breakers are non-pressure and non-current; or the automatic control auxiliary machine carries out circuit breaker position division judgment and circuit no-voltage and no-current judgment on the collected circuit breaker positions at two ends, the circuit voltage and the current, and then transmits the judgment result to the automatic control main machine at two ends of the pipe gallery through the optical fiber.
The automatic control host computer at circuit piping lane both ends gathers the circuit voltage and the electric current at piping lane both ends respectively to and induced-current quick release device switch position.
The automatic control host at each end transmits the collected line voltage and current of the pipe gallery at the local side to the automatic control host at the opposite end of the pipe gallery through optical fibers, the automatic control host at the local end receives the analog quantity of the automatic control host at the opposite end and then judges the line voltage and current at the two ends of the pipe gallery in the line at low voltage and low current, and the automatic control host at each end judges whether the disconnecting link at the local end is positioned or not; or, the automatic control host at each end respectively judges the line voltage and the line current at each end of the collected line pipe gallery at low voltage and low current, the judgment result is transmitted to the automatic control host at the opposite end of the pipe gallery through optical fibers, and the automatic control host at each end respectively judges whether the disconnecting link at the end is positioned separately.
The automatic control host computer receives this side piping lane line protection action signal.
If judge through the automatic control host computer, satisfy the circuit both sides and jump the position and have not flowed, the non-pressure, the low-voltage undercurrent of piping lane both sides, the induced-current quick release device switch of piping lane one side divides the position, and this side piping lane circuit protection action, then the automatic control host computer is through presetting the automatic combined floodgate of the switch of the induced-current quick release device of time delay control this side piping lane.
In the automatic control system, the specific criterion for judging whether the line is pressureless or currentless is as follows:
the following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: the two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line is Current isLine N side voltage isCurrent is
Uset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
In the automatic control system, the specific criterion for distinguishing the low-voltage and low-current of the line is as follows:
satisfy following condition, judge piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the pipe gallery are judged:
wherein: the two ends of the pipe gallery are respectively K side and L side, and the collected K side voltage of the pipe gallery isCurrent isThe L side voltage of the pipe gallery isCurrent isUset2、Iset2Respectively the low voltage threshold and the low current threshold at the two ends of the pipe gallery.
In the automatic control system, the two ends of the power transmission line are M, N sides respectively, and when the collected positions of the circuit breakers are at two points, three-phase separating and closing signals of the circuit breaker at the M side of the line are T respectivelyMA、TMB、TMC、HMA、HMB、HMCAnd the circuit breaker position division judgment criterion is as follows: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC0; when the collected circuit breaker position is a single-point position, the circuit breaker position division judgment criterion is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
Among the above-mentioned automatic control system, the piping lane both ends are K side, L side respectively, and when the induced-current quick release device switch position of gathering was the dual position, the induced-current quick release device switch triphase of piping lane K side was divided, the signal that closes was T respectivelyKA、TKB、TKC、HKA、HKB、HKCThe L-side circuit breaker of the pipe gallery is divided and closed by signals respectively TLA、TLB、TLC、HLA、HLB、HLCAnd the criterion for judging the separation position of the disconnecting link is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC0; when the collected position of the knife switch of the induced current quick release device is a single-point position, the criterion for judging the position of the knife switch is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
Fig. 2 is a schematic view of an automatic control system of the induced current quick release device according to the present invention. An embodiment of the automatic control system of the induced current quick release device of the present invention is described with reference to fig. 2. An automatic control system of an induced current quick release device comprises two automatic control main machines and two automatic control auxiliary machines, wherein the automatic control main machines are respectively installed at two ends of a pipe gallery, and the automatic control auxiliary machines are respectively installed at two ends of a circuit;
the automatic control auxiliary machines at two ends of the line respectively collect the positions of the circuit breakers at two ends of the line, the voltage and the current of the line, and judge whether the circuit breakers at two ends of the line are positioned or not, and whether the circuit breakers are non-voltage or non-current. The method comprises two modes:
the first method is as follows: the auxiliary engine transmits the collected circuit breaker position at the two ends of the circuit, the circuit voltage and the current to the automatic control host at the two ends of the pipe gallery through optical fibers, and the host judges according to step 2 after receiving the switching value and the analog quantity at the two ends of the circuit.
The second method comprises the following steps: the auxiliary engine carries out circuit breaker position division discrimination, circuit non-pressure and non-current discrimination on circuit positions, circuit voltages and current at two ends of the collected circuit, and transmits the discrimination result of the step 2 to the automatic control host at two ends of the pipe gallery through optical fibers.
The method for judging whether the circuit breakers at two ends of the line are separated, have no voltage and have no current comprises the following steps:
1) circuit breaker divides the position to differentiate: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0。
2) Judging whether the line voltage is no voltage:
3) judging whether the line has no flow:
the automatic control host computer at circuit piping lane both ends gathers the position of circuit voltage, circuit current and the quick release device switch of induced-current at circuit piping lane both ends respectively, and the induced-current release device switch triphase of piping lane K side divides, closes the position and is TKA、TKB、TKC、HKA、HKB、HKCAt a voltage ofCurrent isThe L-side breaker of the pipe gallery is divided and closed into TLA、TLB、TLC、HLA、HLB、HLCAt a voltage ofCurrent is
And (3) judging whether the voltage and the current of the two ends of the pipe gallery in the circuit are smaller than threshold values and whether the disconnecting link is positioned:
1) and (3) disconnecting link separating position judgment: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0。
2) And (3) judging the low voltage on two sides of the pipe gallery:
3) and (3) judging low currents on two sides of the pipe gallery:
the collected line voltage and current of the pipe gallery on the side are transmitted to the automatic control host machine through the optical fibers and the pipe gallery opposite end by the host machine at each end, and the host machine judges whether the voltage and the current of the two ends of the pipe gallery in the line are smaller than a threshold value or not after receiving the analog quantity of the host machine on the opposite side. Each end host machine respectively judges whether the local end disconnecting link is in the separating position. Or, each end host machine carries out low-voltage low-current line judgment on the line voltage and the current of each end of the collected line pipe rack respectively, and transmits the judgment result to the automatic control host machine at the opposite end of the pipe rack through optical fibers. Each end host machine respectively judges whether the local end disconnecting link is in the separating position.
The automatic control host computer receives this side piping lane line protection action signal.
If judge through the automatic control host computer, satisfy the circuit both sides and jump the position and have not flowed, the non-pressure, the low-voltage undercurrent of piping lane both sides, the induced-current quick release device switch of piping lane one side divides the position, and this side piping lane circuit protection action, then the automatic control host computer is through presetting the automatic combined floodgate of the switch of the induced-current quick release device of time delay control this side piping lane.
For a K-end host of a pipe gallery, judging that the M end and the N end of a line jump and no current (T)MA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0,All less than 0.06In, 0.06In being no-current threshold), voltageAre all less than 30V, and 30V is a non-voltage threshold; piping lane K and L end line voltageAre all less than 30V, and 30V is low voltage threshold and currentAre all less than 0.2In, 0.2In is a low current threshold; the pipe gallery K-end disconnecting link is divided (T)KA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC0), receive pipe gallery K end line protection action in addition, then act after certain delay. The same logic is applied to the automatic control at the L end.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (11)

1. An automatic control method of an induced current quick release device is characterized by comprising the following steps:
step 1, collecting the position of a circuit breaker, the voltage of a circuit and the current of the circuit at two ends of a power transmission line respectively;
step 2, judging whether circuit breakers at two ends of a line are in a position division mode, and whether the circuit breakers are in no voltage and no current;
step 3, respectively collecting the positions of circuit voltages, circuit currents and induced current quick release device disconnecting links at two ends of the GIL pipe gallery in the circuit;
step 4, judging whether the voltage and the current at two ends of the GIL pipe gallery in the circuit are low-voltage and low-current or not and whether the disconnecting link is in a separating position or not;
step 5, judging whether the line protection of the GIL pipe gallery in the line is in action;
and 6, if the requirement that the two sides of the line jump without current and pressure is met, the low voltage and the low current are arranged on the two sides of the GIL pipe gallery, the disconnecting link of the induced current quick release device on one side of the GIL pipe gallery is disconnected, and the line of the GIL pipe gallery on the side is protected to act, so that the automatic closing of the disconnecting link of the induced current quick release device on the side is controlled through preset delay.
2. The automatic control method of an induced current quick release device according to claim 1,
in the step 1: the two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line is Current isLine N side voltage isCurrent is
The specific criterion for judging whether the line is non-pressure and non-flow in the step 2 is as follows:
the following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: u shapeset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
3. The method as claimed in claim 1, wherein the step 3G is performed by a controllerIL piping lane both ends are K side, L side respectively, and the GIL piping lane K side voltage who gathers isCurrent isThe voltage at the L side of the GIL pipe gallery isCurrent is
The specific criterion for judging whether the voltage and the current at two ends of the GIL pipe gallery in the circuit are low-voltage and low-current in the step 4 is as follows:
satisfy following condition, judge GIL piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the GIL pipe gallery are judged:
wherein: u shapeset2、Iset2Respectively a low voltage threshold and a low current threshold at both ends of the GIL pipe gallery.
4. The automatic control method of an induced current quick release device according to claim 1, wherein two ends of the transmission line are M, N sides respectively, and when the collected position of the circuit breaker is a two-point position, the circuit breaker on the M side of the line is subjected to three-phase opening and closing signalsAre respectively TMA、TMB、TMC、HMA、HMB、HMCThen, the circuit splitter position division determination criterion in step 2 is: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0;
When the collected circuit breaker position is a single-point position, the circuit breaker position division judgment criterion in the step 2 is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
5. The automatic control method of an induced current quick release device according to claim 1, wherein two ends of the GIL pipe corridor are respectively a K side and an L side, and when the collected induced current quick release device knife switch position is a two-point position, three-phase separation and combination signals of the induced current release device knife switch on the K side of the GIL pipe corridor are respectively TKA、TKB、TKC、HKA、HKB、HKCThe L side breaker of the GIL pipe gallery is divided and closed by the signal TLA、TLB、TLC、HLA、HLB、HLCAnd if so, the criterion for judging the disconnecting link separating position in the step 4 is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0;
When the collected position of the knife switch of the induced current quick release device is a single-point position, the criterion for judging the position of the knife switch in the step 4 is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
6. The automatic control method of the induced current quick release device according to claim 1, wherein the induced current quick release device is installed on both sides of the GIL pipe gallery of the power transmission line, and the automatic control closing is performed on both sides according to the step 6.
7. An automatic control system of an induced current quick release device is characterized by comprising two automatic control main machines and two automatic control auxiliary machines, wherein the automatic control main machines are respectively installed at two ends of a GIL pipe gallery, and the automatic control auxiliary machines are respectively installed at two ends of a line;
the automatic control auxiliary machines at two ends of the line respectively collect the positions of circuit breakers at two ends of the line, line voltage and current; the automatic control auxiliary machine transmits the collected breaker position, line voltage and current to the automatic control host at two ends of the GIL pipe gallery through optical fibers at the same time, and the automatic control host judges whether the breakers at two ends of the line are separated, have no voltage and have no current; or the automatic control auxiliary machine carries out circuit breaker position division judgment and circuit no-voltage and no-current judgment on the collected circuit breaker positions at two ends of the circuit, the circuit voltage and the collected circuit current, and then transmits a judgment result to the automatic control main machines at two ends of the GIL pipe gallery through optical fibers;
the automatic control host at two ends of the line GIL pipe gallery collects line voltage and current at two ends of the GIL pipe gallery respectively, and positions of the knife switch of the induced current quick release device;
the automatic control host at each end transmits the acquired line voltage and current of the GIL pipe gallery at the side to the automatic control host at the opposite end of the GIL pipe gallery through optical fibers, the automatic control host at the end receives the analog quantity of the automatic control host at the opposite end and then judges the line low-voltage low-current at the two ends of the GIL pipe gallery in the line, and the automatic control host at each end judges whether the disconnecting link at the end is positioned or not; or, the automatic control host at each end respectively judges the line voltage and the line current at each end of the line GIL pipe gallery, the judgment result is transmitted to the automatic control host at the opposite end of the GIL pipe gallery through optical fibers, and the automatic control host at each end respectively judges whether the disconnecting link at the local end is positioned;
the automatic control host receives a line protection action signal of the local side GIL pipe gallery;
if judge through the automatic control host computer, satisfy the circuit both sides and jump the position and have not flowed, the non-pressure, the low-voltage undercurrent in GIL piping lane both sides, the quick release device switch of GIL piping lane induced-current divides the position in one side, and this side GIL piping lane circuit protection action, then the automatic control host computer is through presetting the automatic combined floodgate of the switch of the quick release device of delay control this side GIL piping lane induced-current.
8. The automatic control system of claim 7, wherein the specific criteria for determining whether the line is pressureless or currentless are as follows:
the following conditions are met, and the voltage of the line is judged to be no voltage:
and the following conditions are satisfied, and the line is judged to have no flow:
wherein: the two ends of the transmission line are M, N sides respectively, and the collected voltage of the M side of the transmission line is Current isLine N side voltage isCurrent is Uset1、Iset1Respectively a voltage-free threshold and a current-free threshold at two ends of the circuit.
9. The automatic control system of claim 7, wherein the specific criteria for determining the low voltage and low current of the line are as follows:
satisfy following condition, judge GIL piping lane both sides low voltage:
the following conditions are met, and the low currents on two sides of the GIL pipe gallery are judged:
wherein: the two ends of the GIL pipe gallery are respectively a K side and an L side, and the collected voltage of the K side of the GIL pipe gallery is Current isThe voltage at the L side of the GIL pipe gallery isCurrent is
Uset2、Iset2Respectively a low voltage threshold and a low current threshold at both ends of the GIL pipe gallery.
10. The automatic control system of claim 7, wherein the two ends of the transmission line are M, N sides, respectively, and when the collected position of the circuit breaker is a two-point position, the three-phase opening and closing signals of the circuit breaker on the M side of the transmission line are TMA、TMB、TMC、HMA、HMB、HMCAnd the circuit breaker position division judgment criterion is as follows: t isMA=1、TMB=1、TMC=1、HMA=0、HMB=0、HMC=0,TNA=1、TNB=1、TNC=1、HNA=0、HNB=0、HNC=0;
When the collected circuit breaker position is a single-point position, the circuit breaker position division judgment criterion is TMA=1、TMB=1、TMC=1、TNA=1、TNB=1、TNC=1。
11. The automatic control system of claim 7, wherein the two ends of the GIL pipe rack are respectively the K side and the L side, and when the collected position of the knife switch of the induced current quick release device is the two-point position, the three-phase separation and combination signals of the knife switch of the induced current quick release device on the K side of the GIL pipe rack are respectively TKA、TKB、TKC、HKA、HKB、HKCThe L side breaker of the GIL pipe gallery is divided and closed by the signal TLA、TLB、TLC、HLA、HLB、HLCAnd the criterion for judging the separation position of the disconnecting link is as follows: t isKA=1、TKB=1、TKC=1、HKA=0、HKB=0、HKC=0,TLA=1、TLB=1、TLC=1、HLA=0、HLB=0、HLC=0;
When the collected position of the knife switch of the induced current quick release device is a single-point position, the criterion for judging the position of the knife switch is as follows: t isKA=1、TKB=1、TKC=1、TLA=1、TLB=1、TLC=1。
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