CN114285015A - Reclosing method for compound traction network of electrified railway - Google Patents
Reclosing method for compound traction network of electrified railway Download PDFInfo
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- CN114285015A CN114285015A CN202210014809.4A CN202210014809A CN114285015A CN 114285015 A CN114285015 A CN 114285015A CN 202210014809 A CN202210014809 A CN 202210014809A CN 114285015 A CN114285015 A CN 114285015A
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Abstract
The invention discloses a reclosing method for a compound traction network of an electrified railway, which comprises a reclosing method for a direct power supply traction network and a full parallel AT traction network. The reclosing method of the direct power supply traction network comprises the following steps: when the uplink line has fault tripping and is delayed, if the voltage mode to earth of each parallel line at the uplink line side is smaller than a voltage setting value, the uplink line is judged to have permanent fault, and the circuit breaker of the uplink line and the reclosing of the circuit breakers of each parallel line are locked; otherwise, the instantaneous fault of the uplink is judged, and the breaker of the uplink is superposed. When the down-link line has fault tripping, the fault type is judged and the processing mode is the same. According to the invention, by judging whether the fault is an instantaneous fault or a permanent fault, when the permanent fault occurs, reclosing of the fault line and the parallel line is locked, and the adverse effect of automatic reclosing on the system can be avoided.
Description
Technical Field
The invention relates to the technical field of power supply of electrified railways, in particular to a reclosing method of a compound line traction network of an electrified railway.
Background
In electrified railways, most faults are faults of the traction network, and transient faults are more frequent according to operation experience. Therefore, the existing traction power supply system feeder protection adopts automatic reclosing, and the circuit breaker is controlled to reclose after a period of time delay is experienced after the protection tripping. If the fault is transient, the automatic reclosing can improve the power supply reliability and reduce the power failure time, and the method has good benefit. However, if the fault is a permanent fault, the automatic reclosing has the following problems: (1) the system is enabled to bear fault impact again, and the safe operation of the system is not facilitated. (2) The breaker can continuously cut off the fault current twice in a short time, and the insulation strength, the breaking capacity and the service life of the breaker are adversely affected.
Disclosure of Invention
The invention provides a reclosing method for a compound traction network of an electrified railway, which can distinguish transient faults from permanent faults after the faults trip out and avoid the adverse effect of automatic reclosing on a system after the permanent faults occur.
The technical scheme for realizing the purpose of the invention is as follows:
a reclosing method for a compound line traction network of an electrified railway is characterized in that the compound line traction network is a direct power supply traction network;
when the uplink line has fault tripping and is delayed, if the voltage mode to earth of each parallel line at the uplink line side is smaller than a voltage setting value, the uplink line is judged to have permanent fault, and the circuit breaker of the uplink line and the reclosing of the circuit breakers of each parallel line are locked; otherwise, judging that the uplink has instantaneous faults, and reclosing the breaker of the uplink;
when the downlink is tripped due to faults and delayed, and the voltage to earth moduli of all parallel lines on the side of the downlink are smaller than a voltage setting value, judging that the downlink has permanent faults, and locking the circuit breakers of the downlink and the reclosing of the circuit breakers of all parallel lines; otherwise, the downlink is judged to have transient faults and the circuit breaker of the downlink is superposed.
According to the further technical scheme, the instantaneous fault of the uplink is judged, the circuit breakers of the uplink are overlapped, and the circuit breakers of all parallel lines are also overlapped; and determining that the down link has transient faults, reclosing the circuit breakers of the down link, and reclosing the circuit breakers of all parallel links.
In the two technical schemes, the two technical schemes are adopted,
the uplink line fault tripping specifically comprises the following steps: the circuit breakers of the uplink and each parallel line trip, and the circuit breakers of the downlink do not trip; the downlink fault tripping specifically comprises the following steps: the downstream circuit breaker trips the circuit breaker of each parallel line, and the upstream circuit breaker does not trip.
Alternatively, the first and second electrodes may be,
the uplink line fault tripping specifically comprises the following steps: the circuit breakers of the uplink, the circuit breakers of the downlink and the circuit breakers of each parallel line are tripped, and if the fault tide direction points from the downlink to the uplink when a fault occurs, the circuit breakers of the downlink are overlapped; the downlink fault tripping specifically comprises the following steps: the circuit breakers of the uplink, the circuit breakers of the downlink and each circuit breaker of the parallel lines are tripped, and if the fault tide direction is from the uplink to the downlink when a fault occurs, the circuit breakers of the uplink are overlapped.
The other reclosing method for the compound traction network of the electrified railway is characterized in that the compound traction network is a full parallel AT traction network;
when the uplink line has fault tripping, after time delay:
if the voltage-to-ground modular values of all parallel lines of the T line are smaller than the voltage setting value on the side of the uplink line, judging that the T line permanent fault occurs on the uplink line, and locking the reclosure of the breaker of the uplink line and the breakers of all parallel lines on the side of the uplink line;
if the voltage-to-ground modular values of all parallel lines of the F line are smaller than the voltage setting value on the side of the uplink line, judging that the permanent fault of the F line occurs on the uplink line, firstly separating all isolating switches of the F line on the side of the uplink line, and then overlapping the circuit breakers of the uplink line;
if the line-to-line voltage modulus values of the parallel lines of the T line and the F line are smaller than the voltage setting value on the side of the uplink line, judging that the line-to-line permanent fault occurs on the uplink line, and locking the reclosure of the breaker of the uplink line and the breakers of the parallel lines on the side of the uplink line; if the permanent faults of the T line, the F line and the line are not generated on the side of the uplink, the instantaneous fault of the uplink is judged to be generated, and the circuit breaker of the uplink is superposed;
when the down line has fault tripping, after time delay:
on the side of a lower line, if the voltage mode values to earth of all parallel lines of the T line are smaller than a voltage setting value, the downlink line is judged to have a permanent fault of the T line, and a circuit breaker of the downlink line and a reclosing switch of the circuit breaker of each parallel line on the side of the downlink line are locked;
on the side of a lower line, if the voltage-to-ground modular values of all parallel lines of the F line are smaller than a voltage setting value, determining that the F line permanent fault occurs on the downlink, firstly separating all isolating switches of the F line on the side of the downlink, and then overlapping a circuit breaker of the downlink;
on the side of a lower line, if the line voltage modulus values of the parallel lines of the T line and the F line are smaller than the voltage setting value, determining that the line-to-line permanent fault occurs on the downlink, and locking the reclosing of the circuit breaker of the downlink and the circuit breakers of the parallel lines on the side of the downlink; and if the T line permanent fault, the F line permanent fault and the line-to-line permanent fault do not occur on the side of the lower line road, determining that the downlink has a transient fault and reclosing the circuit breaker of the downlink.
According to the further technical scheme, the judgment that the uplink has the transient fault is carried out, the circuit breakers of the uplink are superposed, and the circuit breakers of all parallel lines on the side of the uplink are also superposed; and determining that the downlink has transient faults, reclosing the circuit breakers of the downlink and reclosing the circuit breakers of all parallel lines at the side of the downlink.
In the two technical schemes, the two technical schemes are adopted,
the uplink line fault tripping specifically comprises the following steps: the circuit breaker of the uplink and the circuit breaker of each parallel line at the side of the uplink trip, and the circuit breaker of the downlink does not trip; the downlink fault tripping specifically comprises the following steps: the circuit breakers of the downlink and each parallel line of the downlink side trip, and the circuit breakers of the uplink do not trip.
Alternatively, the first and second electrodes may be,
the uplink line fault tripping specifically comprises the following steps: the circuit breaker of the uplink, the circuit breaker of the downlink, the circuit breaker of each parallel line of the uplink side and the circuit breaker of each parallel line of the downlink side trip, if the fault tide direction points from the downlink to the uplink when the fault occurs, the circuit breaker of the downlink is superposed; the downlink fault tripping specifically comprises the following steps: the breaker of the uplink, the breaker of the downlink, the breaker of each parallel line at the side of the uplink and the breaker of each parallel line at the side of the downlink trip, and if the fault tide direction is from the uplink to the downlink when a fault occurs, the breaker of the uplink is overlapped.
The beneficial effect of the invention is that,
(1) by judging whether the fault is a transient fault or a permanent fault, when the permanent fault occurs, reclosing of the fault line and the parallel line is locked, and the adverse effect of automatic reclosing on the system can be avoided.
(2) And the fault line is judged according to the fault tide direction when the fault occurs, and the circuit breakers of the non-fault line are superposed, so that the power supply of the non-fault line can be quickly recovered.
(3) For the AT traction network, when the T line is judged to have no fault and the F line has a permanent fault, all disconnecting switches of the F line of the fault line are separated, then the circuit breakers of the non-fault line are superposed, the power supply of the T line is recovered, and the power supply can be recovered to the maximum extent.
Drawings
Fig. 1 is a schematic diagram of a multi-wire traction net.
Fig. 2 is a schematic diagram of a fully parallel AT traction network.
Fig. 3 is a schematic diagram of normal power supply in a double circuit breaker mode.
Fig. 4 is a schematic diagram of a dual breaker mode handoff.
Fig. 5 is a schematic diagram of normal power supply in a single breaker mode.
Fig. 6 is a schematic diagram of a single breaker mode power supply.
Fig. 7 is a schematic diagram of a complex line direct supply normal power supply.
Fig. 8 is a schematic diagram of a complex line direct supply handoff.
Fig. 9 is a schematic diagram of a full parallel direct supply normal power supply.
Fig. 10 is a schematic diagram of a full parallel direct supply handoff.
Fig. 11 is a schematic diagram of a dual inlet mode power supply via a multi-stage switching station.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A multi-wire hauling net is shown in figure 1. The uplink and downlink lines are connected in parallel through parallel lines 1-n. PT 1-PTn are voltage transformers on uplink lines of other pavilions outside the pavilion at the power supply side, and the measured voltages are respectively
Obtaining the modulus value of the voltage to the ground voltage at each place by taking the modulus value of the voltage
A coupling capacitor C exists between the two parallel lines12And a coupling impedance Z per unit lengthm。
When the uplink line has a fault, the fault tide direction of each parallel line points to the uplink from the downlink. When the down line has a fault, the fault flow direction of each parallel line is opposite to that in the figure, and the down line is directed from the up line. Therefore, the faulty line can be determined from the fault current flow direction of the parallel lines.
When the uplink line has a fault, if a protection scheme capable of distinguishing the fault line is adopted, the circuit breaker (1QF) of the fault line and the circuit breakers (3QF, 4QF and …) of all parallel lines are only tripped for protection after the fault occurs. If a protection scheme that tripping is needed in both uplink and downlink is adopted, after a fault occurs, protection can trip all circuit breakers (1QF, 2QF, 3QF, 4QF and …), at the moment, a fault line can be judged according to the fault current direction of a parallel line, and circuit breakers (2QF) of non-fault lines are reclosed.
When the circuit breaker 1QF is disconnected, the circuit breaker 2QF is closed, the circuit breakers on all parallel lines are also disconnected, and the two ends of the uplink line are open and have no fault, the capacitance coupling voltage of the uplink line
And the voltage of inductive coupling
Comprises the following steps:
in the formula C10And C20The earth capacitances of the uplink and downlink lines respectively;
is the voltage of the downlink line and is,
is the current in the downlink and L is the line length.
At this time, the voltage measured by each voltage transformer is:
when the upper line has a transit resistance RgWhen the ground fault occurs, the voltage is divided by the coupling capacitor between the ground resistor and the line after the ground resistor is connected with the line to ground capacitor in parallel, and the capacitive coupling voltage is reduced because the ground resistor is far smaller than the capacitive reactance of the line to ground capacitor. At this time, the capacitive coupling voltage of the uplink
And the voltage of inductive coupling
Comprises the following steps:
in the formula
f is power frequency, and 50Hz is taken.
At this time, the voltage measured by each voltage transformer is:
due to the actual ground resistance RgMuch smaller than the line-to-ground capacitive reactance X10Therefore, the capacitive coupling voltage of the line with the grounding point is much lower than that without the grounding point,
it can be seen that the voltage modulus at each position on the ungrounded line with open circuit at both ends is higher, and the voltage modulus at each position on the ungrounded line with open circuit at both ends is lower. According to the operation experience, the line induction voltage with two open ends and no grounding is generally more than 2500V, and the line induction voltage with two open ends and grounding is generally less than 200V. Whether a fault exists on the line can be judged according to the magnitude of the voltage modulus value on the line, so that whether the fault on the fault line is an instantaneous fault or a permanent fault can be distinguished after the fault trips.
That is, the modulus of each voltage of a certain line to the ground is smaller than the setting value:
in the formula of UsetAnd setting the voltage setting value according to the lowest voltage which is smaller than the lowest voltage when the two ends of the line are open and not grounded.
If the formula (5) is satisfied, the circuit is a permanent fault, and the circuit breaker of the circuit is locked.
If the formula (5) is not satisfied, the circuit is in a transient fault, and automatic reclosing can be performed. The automatic reclosing can only reclose the circuit breaker of the fault line, and can also reclose the circuit breakers of the fault line and the parallel line.
According to the circuit symmetry principle, the situation when the downlink fails is the same as that of the uplink, and the judgment of the failure type and the processing mode are the same.
A fully parallel AT traction network is shown in fig. 2. In the figure, 1 QF-6 QF are bipolar circuit breakers, 1 QST-6 QST are single-pole isolating switches on a T line, 1 QSF-6 QSF are single-pole isolating switches on an F line, and the circuit breakers and the isolating switches are closed when the circuit runs normally. PT 1T-PT 6T are voltage transformers on the T line, and the measured voltage is the ground voltage of the T line
PT 1F-PT 6F are voltage transformers on an F line, and the measured voltage is the ground voltage of the F line
The line pointed by each pavilion bus is defined as a positive direction. When the circuit is in fault, the protection device controls 1QF to 6QF to be disconnected. If the fault current flowing through the circuit breaker 3QF on the AT and the circuit breaker 5QF on the subarea is in the positive direction, the fault occurs in an uplink.
First, the 2QF reclose of the downlink resumes the downlink power supply. After the 2QF reclosure is successful, 4QF and 6QF reclosure can be sequentially controlled, or 4QF and 6QF automatic reclosure with pressure is detected.
And secondly, after a period of time delay, comparing the modulus of the voltages of the uplink T line and the F line to the ground voltage at each position except the power supply station with the modulus of the voltage of the T line and the F line to the voltage setting value obtained by calculation.
(1) If the modulus value of each voltage of the T line to the ground is smaller than the setting value:
the permanent fault occurs to the ground of the T line. Because the train needs to get electricity from the T line, the power supply of the F line does not need to be recovered under the condition that the T line has a permanent fault, and the reclosing is locked immediately.
(2) If the modulus of each voltage between the T line and the F line is smaller than the setting value:
the permanent fault occurs between the T line and the F line, and the two leads can not recover power supply and should be immediately closed and reclosed.
(3) If the modulus of each voltage of the F line to the ground is smaller than the setting value:
indicating that a permanent fault occurred on line F. Because the train needs to get electricity from the T line, the T line power supply can still be recovered under the condition that the F line has a permanent fault, the F line disconnecting switches 1QSF, 3QSF and 5QSF of each pavilion are controlled to be separated, and then the 1QF reclosing of the substation is controlled. After the 1QF reclosing is successful, the 3QF and 5QF reclosing can be sequentially controlled, or the 3QF and 5QF detection pressure automatic reclosing is carried out, the power supply of the T line of the uplink is recovered, and the operation is carried out in a direct power supply mode.
(4) If none of the equations (6) to (8) is satisfied, a transient fault occurs, and the 1QF reclosing of the substation should be controlled. After the 1QF reclosing is successful, the 3QF and 5QF reclosing can be sequentially controlled, or the 3QF and 5QF detection pressure automatic reclosing is carried out, and the power supply of an uplink is recovered.
According to the circuit symmetry principle, the situation when the downlink fails is the same as that of the uplink, and the judgment of the failure type and the processing mode are the same.
The specific embodiment is as follows:
1. dual breaker mode normal power supply
For the dual breaker mode normal power supply mode as shown in fig. 3, the reclosing implementation scheme is as follows:
and defining a line AT one side of the breaker, in which the fault current in the AT place or the subarea place points to the positive direction when the fault occurs, as a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, comparing the voltage mode value to ground of the lead and the voltage mode value between leads at each pavilion of the fault line except the pavilion at the power supply side with a voltage setting value after a period of time delay, and if the voltage mode values to ground of a certain lead are all smaller than the voltage setting value or the voltage mode values between leads are all smaller than the setting value, the lead is subjected to permanent fault to ground or between leads.
If a permanent fault of a contact line (T line) to the ground or a permanent fault between the T line and the F line occurs, reclosing is immediately locked.
If a permanent fault of a positive feeder line (F line) to the ground occurs, the F line isolation switches of all the pavilions are controlled to be separated, then the feeder line circuit breakers of the pavilions on the power supply side are controlled to be reclosed, and the fault line is recovered to be in direct power supply operation.
If no permanent fault occurs between the conductor and the ground or between the conductors, the transient fault occurs, and the reclosing action of the fault circuit breaker is controlled.
2. Dual breaker mode power supply across zones
For a double breaker mode of power supply as shown in fig. 4, the substation 2 is taken out of operation, the substation 1 is powered by QS through a substation disconnect switch 1, and the reclosing implementation is as follows:
and defining a line AT one side of the breaker, in which the fault current in the AT place or the subarea place points to the positive direction when the fault occurs, as a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, comparing the voltage mode value to ground of the lead and the voltage mode value between leads at each pavilion of the fault line except the pavilion at the power supply side with a voltage setting value after a period of time delay, and if the voltage mode values to ground of a certain lead are all smaller than the voltage setting value or the voltage mode values between leads are all smaller than the setting value, the lead is subjected to permanent fault to ground or between leads.
If a permanent fault of a contact line (T line) to the ground or a permanent fault between the T line and the F line occurs, reclosing is immediately locked.
If a permanent fault of a positive feeder line (F line) to the ground occurs, the F line isolation switches of all the pavilions are controlled to be separated, then the feeder line circuit breakers of the pavilions on the power supply side are controlled to be reclosed, and the fault line is recovered to be in direct power supply operation.
If no permanent fault occurs between the conductor and the ground or between the conductors, the transient fault occurs, and the reclosing action of the fault circuit breaker is controlled.
3. Normal power supply in single breaker mode
For a single breaker mode normal supply as shown in fig. 5, the reclosing implementation is as follows:
defining that a descending line points to an ascending line as a positive direction, when a fault occurs, if the fault current of the AT or the subarea points to the positive direction, the ascending line is a fault line, and if the fault current points to the negative direction, the descending line is a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, comparing the voltage mode value to ground of the lead and the voltage mode value between leads at each pavilion of the fault line except the pavilion at the power supply side with a voltage setting value after a period of time delay, and if the voltage mode values to ground of a certain lead are all smaller than the voltage setting value or the voltage mode values between leads are all smaller than the setting value, the lead is subjected to permanent fault to ground or between leads.
If a permanent fault of a contact line (T line) to the ground or a permanent fault between the T line and the F line occurs, reclosing is immediately locked.
If a permanent fault of a positive feeder line (F line) to the ground occurs, the F line isolation switches of all the pavilions are controlled to be separated, then the feeder line circuit breakers of the pavilions on the power supply side are controlled to be reclosed, and the fault line is recovered to be in direct power supply operation.
If no permanent fault occurs between the conductor and the ground or between the conductors, the transient fault occurs, and the reclosing action of the fault circuit breaker is controlled.
4. Single breaker mode power supply across zones
For a single breaker mode of power transfer as shown in fig. 6, the substation 2 is taken out of operation and the substation 1 is powered by QS via the substation disconnect switches 1QS and 2QS, the reclosing implementation is as follows:
defining that a descending line points to an ascending line as a positive direction, when a fault occurs, if the fault current of the AT or the subarea points to the positive direction, the ascending line is a fault line, and if the fault current points to the negative direction, the descending line is a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, comparing the voltage mode value to ground of the lead and the voltage mode value between leads at each pavilion of the fault line except the pavilion at the power supply side with a voltage setting value after a period of time delay, and if the voltage mode values to ground of a certain lead are all smaller than the voltage setting value or the voltage mode values between leads are all smaller than the setting value, the lead is subjected to permanent fault to ground or between leads.
If a permanent fault of a contact line (T line) to the ground or a permanent fault between the T line and the F line occurs, reclosing is immediately locked.
If a permanent fault of a positive feeder line (F line) to the ground occurs, the F line isolation switches of all the pavilions are controlled to be separated, then the feeder line circuit breakers of the pavilions on the power supply side are controlled to be reclosed, and the fault line is recovered to be in direct power supply operation.
If no permanent fault occurs between the conductor and the ground or between the conductors, the transient fault occurs, and the reclosing action of the fault circuit breaker is controlled.
5. Multiple line direct supply normal power supply
For the multiple line direct supply normal power supply as shown in fig. 7, the reclosing implementation scheme is as follows:
after a fault occurs, after a period of time delay, the voltage mode value of the wire to earth at each pavilion except the pavilion at the power supply side of the fault line is compared with the voltage setting value, if the voltage mode value of the wire to earth is smaller than the voltage setting value, the line has a permanent fault, and reclosure is locked immediately.
If the permanent fault does not occur in the line, the transient fault occurs, and the reclosing action of the fault line breaker is controlled.
6. Complex line direct supply cross-region power supply
For the complex line direct supply cross-over power supply shown in fig. 8, the substation 2 is out of operation, and the substation 1 is cross-over supplied with power through the cross-over isolation switches 1QS and 2QS of the sub-district, the reclosing implementation is as follows:
after a fault occurs, after a period of time delay, the voltage mode value of the wire to earth at each pavilion except the pavilion at the power supply side of the fault line is compared with the voltage setting value, if the voltage mode value of the wire to earth is smaller than the voltage setting value, the line has a permanent fault, and reclosure is locked immediately.
If the permanent fault does not occur in the line, the transient fault occurs, and the reclosing action of the fault line breaker is controlled.
7. Full parallel direct supply normal power supply
For the full parallel direct supply normal power supply as shown in fig. 9, the reclosing implementation scheme is as follows:
defining that a descending line points to an ascending line as a positive direction, when a fault occurs, if the fault current of a parallel point or a partition points to the positive direction, the ascending line is a fault line, and if the fault current points to the negative direction, the descending line is a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, after a period of time delay, comparing the voltage mode value of the wire to ground at each pavilion of the fault line except the pavilion at the power supply side with the voltage setting value, and if the voltage mode value of the wire to ground is smaller than the voltage setting value, the line has a permanent fault and the reclosure is locked immediately.
If the permanent fault does not occur in the line, the transient fault occurs, and the reclosing action of the fault line breaker is controlled.
8. Full parallel direct supply cross-zone power supply
For a fully parallel direct supply cross-over as shown in fig. 10, the substation 2 is taken out of operation, the substation 1 is cross-over supplied via the cross-over disconnectors 1QS and 2QS of the sub-bays, and the reclosing implementation is as follows:
defining that a descending line points to an ascending line as a positive direction, when a fault occurs, if the fault current of a parallel point or a partition points to the positive direction, the ascending line is a fault line, and if the fault current points to the negative direction, the descending line is a fault line.
Firstly, the reclosing action of the non-fault line breaker is controlled, and the power supply of the non-fault line is recovered.
And then, after a period of time delay, comparing the voltage mode value of the wire to ground at each pavilion of the fault line except the pavilion at the power supply side with the voltage setting value, and if the voltage mode value of the wire to ground is smaller than the voltage setting value, the line has a permanent fault and the reclosure is locked immediately.
If the permanent fault does not occur in the line, the transient fault occurs, and the reclosing action of the fault line breaker is controlled. 9. Double inlet wire mode supplied by multi-stage switching station
For the double incoming line mode powered via a multi-stage switching station as shown in fig. 11, the reclosing implementation is as follows:
after a fault occurs, after a period of time delay, the voltage mode value of the wire to earth at each pavilion except the pavilion at the power supply side of the fault line is compared with the voltage setting value, if the voltage mode value of the wire to earth is smaller than the voltage setting value, the line has a permanent fault, and reclosure is locked immediately.
If the permanent fault does not occur in the line, the transient fault occurs, and the reclosing action of the fault line breaker is controlled.
Claims (8)
1. The reclosing method of the compound traction network of the electrified railway is characterized in that the compound traction network is a direct power supply traction network;
when the uplink line has fault tripping and is delayed, if the voltage mode to earth of each parallel line at the uplink line side is smaller than a voltage setting value, the uplink line is judged to have permanent fault, and the circuit breaker of the uplink line and the reclosing of the circuit breakers of each parallel line are locked; otherwise, judging that the uplink has instantaneous faults, and reclosing the breaker of the uplink;
when the downlink is tripped due to faults and delayed, and the voltage to earth moduli of all parallel lines on the side of the downlink are smaller than a voltage setting value, judging that the downlink has permanent faults, and locking the circuit breakers of the downlink and the reclosing of the circuit breakers of all parallel lines; otherwise, the downlink is judged to have transient faults and the circuit breaker of the downlink is superposed.
2. The reclosing method of the compound traction network of the electrified railway according to claim 1,
the method comprises the steps of judging whether an uplink has a transient fault, reclosing the circuit breakers of the uplink and also reclosing the circuit breakers of all parallel lines;
and determining that the down link has transient faults, reclosing the circuit breakers of the down link, and reclosing the circuit breakers of all parallel links.
3. The reclosing method of the compound traction network of the electrified railway according to claim 1 or 2,
the uplink line fault tripping specifically comprises the following steps: the circuit breakers of the uplink and each parallel line trip, and the circuit breakers of the downlink do not trip;
the downlink fault tripping specifically comprises the following steps: the downstream circuit breaker trips the circuit breaker of each parallel line, and the upstream circuit breaker does not trip.
4. The reclosing method of the compound traction network of the electrified railway according to claim 1 or 2,
the uplink line fault tripping specifically comprises the following steps: the circuit breakers of the uplink, the circuit breakers of the downlink and the circuit breakers of each parallel line are tripped, and if the fault tide direction points from the downlink to the uplink when a fault occurs, the circuit breakers of the downlink are overlapped;
the downlink fault tripping specifically comprises the following steps: the circuit breakers of the uplink, the circuit breakers of the downlink and each circuit breaker of the parallel lines are tripped, and if the fault tide direction is from the uplink to the downlink when a fault occurs, the circuit breakers of the uplink are overlapped.
5. The reclosing method of the compound traction network of the electrified railway is characterized in that the compound traction network is a full parallel AT traction network;
when the uplink line has fault tripping, after time delay:
if the voltage-to-ground modular values of all parallel lines of the T line are smaller than the voltage setting value on the side of the uplink line, judging that the T line permanent fault occurs on the uplink line, and locking the reclosure of the breaker of the uplink line and the breakers of all parallel lines on the side of the uplink line;
if the voltage-to-ground modular values of all parallel lines of the F line are smaller than the voltage setting value on the side of the uplink line, judging that the permanent fault of the F line occurs on the uplink line, firstly separating all isolating switches of the F line on the side of the uplink line, and then overlapping the circuit breakers of the uplink line;
if the line-to-line voltage modulus values of the parallel lines of the T line and the F line are smaller than the voltage setting value on the side of the uplink line, judging that the line-to-line permanent fault occurs on the uplink line, and locking the reclosure of the breaker of the uplink line and the breakers of the parallel lines on the side of the uplink line;
if the permanent faults of the T line, the F line and the line are not generated on the side of the uplink, the instantaneous fault of the uplink is judged to be generated, and the circuit breaker of the uplink is superposed;
when the down line has fault tripping, after time delay:
on the side of a lower line, if the voltage mode values to earth of all parallel lines of the T line are smaller than a voltage setting value, the downlink line is judged to have a permanent fault of the T line, and a circuit breaker of the downlink line and a reclosing switch of the circuit breaker of each parallel line on the side of the downlink line are locked;
on the side of a lower line, if the voltage-to-ground modular values of all parallel lines of the F line are smaller than a voltage setting value, determining that the F line permanent fault occurs on the downlink, firstly separating all isolating switches of the F line on the side of the downlink, and then overlapping a circuit breaker of the downlink;
on the side of a lower line, if the line voltage modulus values of the parallel lines of the T line and the F line are smaller than the voltage setting value, determining that the line-to-line permanent fault occurs on the downlink, and locking the reclosing of the circuit breaker of the downlink and the circuit breakers of the parallel lines on the side of the downlink;
and if the T line permanent fault, the F line permanent fault and the line-to-line permanent fault do not occur on the side of the lower line road, determining that the downlink has a transient fault and reclosing the circuit breaker of the downlink.
6. The reclosing method of the compound traction network of the electrified railway according to claim 5,
the method comprises the steps of judging whether an uplink has a transient fault, and superposing a breaker of the uplink and breakers of all parallel lines at the side of the uplink;
and determining that the downlink has transient faults, reclosing the circuit breakers of the downlink and reclosing the circuit breakers of all parallel lines at the side of the downlink.
7. The reclosing method of the compound traction network of the electrified railway according to claim 5 or 6,
the uplink line fault tripping specifically comprises the following steps: the circuit breaker of the uplink and the circuit breaker of each parallel line at the side of the uplink trip, and the circuit breaker of the downlink does not trip;
the downlink fault tripping specifically comprises the following steps: the circuit breakers of the downlink and each parallel line of the downlink side trip, and the circuit breakers of the uplink do not trip.
8. The reclosing method of the compound traction network of the electrified railway according to claim 5 or 6,
the uplink line fault tripping specifically comprises the following steps: the circuit breaker of the uplink, the circuit breaker of the downlink, the circuit breaker of each parallel line of the uplink side and the circuit breaker of each parallel line of the downlink side trip, if the fault tide direction points from the downlink to the uplink when the fault occurs, the circuit breaker of the downlink is superposed;
the downlink fault tripping specifically comprises the following steps: the breaker of the uplink, the breaker of the downlink, the breaker of each parallel line at the side of the uplink and the breaker of each parallel line at the side of the downlink trip, and if the fault tide direction is from the uplink to the downlink when a fault occurs, the breaker of the uplink is overlapped.
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| CN202210014809.4A CN114285015A (en) | 2022-01-07 | 2022-01-07 | Reclosing method for compound traction network of electrified railway |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040027747A1 (en) * | 2000-07-18 | 2004-02-12 | Sungkyunkwan University | Adaptive reclosing method using variable dead time control in power transmission line |
| CN105790235A (en) * | 2016-03-28 | 2016-07-20 | 南京国电南自轨道交通工程有限公司 | Novel high-way traction power supply system capable of selective feed line tripping |
| CN107300657A (en) * | 2017-07-20 | 2017-10-27 | 西安理工大学 | Asymmetrical three-phase circuit single-phase adaptive reclosing property judgment method |
| CN111313384A (en) * | 2020-03-04 | 2020-06-19 | 西南交通大学 | Fault hop selection protection method for high-speed railway traction network |
| CN112003235A (en) * | 2020-07-22 | 2020-11-27 | 西安理工大学 | Split-phase self-adaptive reclosing time sequence method for power transmission line |
-
2022
- 2022-01-07 CN CN202210014809.4A patent/CN114285015A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040027747A1 (en) * | 2000-07-18 | 2004-02-12 | Sungkyunkwan University | Adaptive reclosing method using variable dead time control in power transmission line |
| CN105790235A (en) * | 2016-03-28 | 2016-07-20 | 南京国电南自轨道交通工程有限公司 | Novel high-way traction power supply system capable of selective feed line tripping |
| CN107300657A (en) * | 2017-07-20 | 2017-10-27 | 西安理工大学 | Asymmetrical three-phase circuit single-phase adaptive reclosing property judgment method |
| CN111313384A (en) * | 2020-03-04 | 2020-06-19 | 西南交通大学 | Fault hop selection protection method for high-speed railway traction network |
| CN112003235A (en) * | 2020-07-22 | 2020-11-27 | 西安理工大学 | Split-phase self-adaptive reclosing time sequence method for power transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 高仕斌等: "复线电力牵引网瞬时与永久性故障识别方法", 《西南交通大学学报》 * |
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