CN113572258B - Distributed FA transfer method, system and storage medium considering line carrying capacity - Google Patents
Distributed FA transfer method, system and storage medium considering line carrying capacity Download PDFInfo
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- CN113572258B CN113572258B CN202110667357.5A CN202110667357A CN113572258B CN 113572258 B CN113572258 B CN 113572258B CN 202110667357 A CN202110667357 A CN 202110667357A CN 113572258 B CN113572258 B CN 113572258B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003860 storage Methods 0.000 title claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims description 45
- 238000004590 computer program Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
Abstract
The invention discloses a distributed FA transfer method, a system and a storage medium considering line carrying capacity, wherein an upstream switch and a downstream switch of a fault point are determined to isolate the fault point by positioning the fault point; acquiring a first load value before opening of a downstream switch, and a second load value of a first switch of the power capacity of a selected transfer line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line; and comparing the first load value with the transfer allowable load value, judging whether the interconnection switch corresponding to the transfer line is in a single-side voltage-losing state, and if the first load value is smaller than or equal to the transfer allowable load value, the interconnection switch is in the single-side voltage-losing state, and the interconnection switch is switched on. The invention considers the bearing capacity of the distribution network line after transfer and then determines whether the tie switch acts, thereby solving the problem of overload of the transfer distribution network line caused by the fact that the load bearing capacity of the transfer line is not considered.
Description
Technical Field
The invention relates to the technical field of intelligent distributed FAs for power distribution automation, in particular to a distributed FA transfer method, a distributed FA transfer system and a storage medium considering line carrying capacity.
Background
Feeder automation is an important way to achieve fault location, isolation and restoration of power in non-fault areas, and current feeder automation mainly includes centralized feeder automation and in-situ feeder automation. The intelligent distributed FA can position and isolate faults before the transformer substation switch acts through peer-to-peer communication among terminals, and power supply of a non-fault area is recovered, so that the power failure range is greatly reduced, and millisecond-level fault isolation and positioning are realized. However, the intelligent distributed FA contact point transfer at present has the following problems: the switching-on logic of the conventional intelligent distributed FA contact point is single-side voltage loss and delayed switching-on after receiving a fault isolation success signal. The switching-on logic does not consider the load bearing capacity of the line, and the overload condition of the non-fault line (i.e. the transfer line) can occur after switching-on of the contact point, so that the fault hidden trouble is increased for the distribution line which normally operates originally.
Therefore, how to solve the problem of overload of the transfer line caused by the load carrying capacity of the transfer line not considered in the existing load transfer has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a distributed FA transfer method, a system and a storage medium considering the line load capacity, which are used for solving the technical problem of overload of transfer distribution lines caused by the fact that the existing load transfer does not consider the load capacity of transfer lines.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a distributed FA transfer method considering line carrying capacity comprises the following steps:
positioning a fault point, and determining an upstream switch and a downstream switch of the fault point to isolate the fault point;
acquiring a first load value before the downstream switch is opened, the power capacity of a selected transfer line and a second load value of a first switch of the transfer line;
calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line;
comparing the first load value with the transfer allowable load value, judging whether a tie switch corresponding to the transfer line is in a single-side voltage loss state, and if the first load value is smaller than or equal to the transfer allowable load value, controlling the tie switch to switch on in a single-side voltage loss state, so as to finish transfer.
Preferably, the second load is the total load of the downstream line measured by the terminal before the transfer line head switch receives successful fault isolation, and the power supply capacity is the maximum load which can be borne by the transfer line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line, wherein the transfer allowable load value is realized by the following formula:
transfer allowance load magnitude = power source capacity-head switch load magnitude, wherein the head switch load magnitude must be the load value adjacent to the moment of failure.
Preferably, the fault point is located, and the upstream switch and the downstream switch of the fault point are determined to isolate the fault point, including the following steps:
for any switch node A, if the switch node A detects fault information and only one side of the adjacent switch nodes does not send out the fault information, judging that the switch node A is positioned at the upstream of the fault point, and controlling the switch node A to act: disconnecting from the downstream failure point;
for any switch node B, if the switch node B does not detect the fault information and only one adjacent switch has fault information, judging that the switch node B is positioned at the downstream of the fault point, and controlling the action of the switch node B for the downstream switch: cutting off the connection with the upstream fault point;
preferably, before calculating the transfer allowable load value of the transfer line according to the power capacity of the transfer line and the second load value of the first switch thereof, the method further comprises the following steps:
after isolating faults, the downstream switch sends a fault isolation success signal and first load value information before switching off the fault isolation success signal to the adjacent side switch;
the adjacent side switch forwards the fault isolation success signal and the first load value to a contact point switch of a selected transfer line, and the contact point switch receives the fault isolation success signal and the first load value and judges whether the adjacent side switch is in a switching-off state or not and whether the adjacent side switch is in single-side voltage loss or not:
if the interconnection switch is in a switching-off state and one side is out of voltage, judging whether the first load value of the downstream switch and the fault isolation success signal of the downstream switch are allowed to be forwarded to a head switch of the transfer line;
if the interconnection switch is in a closing state or has no single-side voltage loss signal, judging that the first load value of the downstream switch and the downstream switch fault isolation success signal are stopped to be forwarded to the head switch of the transfer line;
and after the downstream switch fault isolation success signal and the first load quantity received by the head switch, calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the head switch.
Preferably, after the head switch calculates a transfer allowable load value of the transfer line according to the power capacity of the transfer line and the second load value of the head switch, the method further comprises the following steps:
the head switch obtains and calculates a transfer allowance load value of the transfer line according to the power capacity of the transfer line and a second load value of the head switch;
the first switch compares the first load value with the transfer allowable load value, and if the transfer allowable load value is larger than the load value before the action of the isolating point switch, the first switch sends a transfer signal of allowing the connecting point to transfer to the connecting point switch;
after receiving the signal for allowing the transfer of the contact point, the contact point switch judges whether the contact point switch is still in a single-side voltage-losing state or not through time delay, and if the contact point switch is still in the single-side voltage-losing state, the contact point switch is switched on to finish transfer.
Preferably, when judging that the transfer line head switch sends a transfer permission signal, the method further comprises the following steps:
if the number of the contact point switches is more than 2, the head switches respectively send the allowed contact points to the corresponding contact point switches, and after each contact point switch receives the signals for transferring the allowed contact points, the priority of each contact point switch is determined according to the topological relation of the circuit and the time length of the delay switching-on, wherein the shorter the delay switching-on is, the higher the priority is;
and the contact points with high priority and no failure finish the closing action, and other contact points with low priority can have pressure at both sides within the time delay closing time and do not finish the closing action.
A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method described above when the computer program is executed by the processor.
A computer storage medium having stored thereon a computer program which when executed by a processor performs the steps of the above method.
The invention has the following beneficial effects:
1. the distributed FA transfer method, the system and the storage medium taking the line carrying capacity into consideration determine that an upstream switch and a downstream switch of a fault point isolate the fault point by positioning the fault point; collecting a first load value before opening of a downstream switch, the power supply capacity of a selected transfer line and a second load value of a first switch of the transfer line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line; comparing the first load value with the transfer allowable load value, judging whether a tie switch corresponding to the transfer line is in a single-side voltage loss state, and if the first load value is smaller than or equal to the transfer allowable load value, controlling the tie switch to switch on in a single-side voltage loss state, so as to finish transfer. Compared with the prior art, the invention determines whether the transfer is carried out by comparing the transfer allowable load value of the transfer line with the first load value before the downstream switch is switched off, can effectively solve the problem of overload of the transfer line caused by the fact that the load bearing capacity of the transfer line is not considered in the existing load transfer, and improves the reliability and safety of power supply of a power grid.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The invention will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a distributed FA transfer method of the present invention that considers line load capacity;
FIG. 2 is a flow chart of a distributed FA transfer method considering line load capacity in a preferred embodiment of the present invention;
fig. 3 is a circuit topology diagram in a preferred embodiment of the invention.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Embodiment one:
as shown in fig. 1, the present embodiment discloses a distributed FA transferring method considering line loading capacity, which includes the following steps:
positioning a fault point, and determining an upstream switch and a downstream switch of the fault point to isolate the fault point;
acquiring a first load value before the downstream switch is opened, the power capacity of a selected transfer line and a second load value of a first switch of the transfer line;
calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line;
comparing the first load value with the transfer allowable load value, judging whether a tie switch corresponding to the transfer line is in a single-side voltage loss state, and if the first load value is smaller than or equal to the transfer allowable load value, controlling the tie switch to switch on in a single-side voltage loss state, so as to finish transfer.
In addition, in the present embodiment, a computer system is also disclosed, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the above method when executing the computer program.
In addition, in the present embodiment, a computer storage medium is also disclosed, on which a computer program is stored, which when executed by a processor, implements the steps of the above method.
The distributed FA transfer method, the system and the storage medium taking the line carrying capacity into consideration determine that an upstream switch and a downstream switch of a fault point isolate the fault point by positioning the fault point; collecting a first load value before opening of a downstream switch, the power supply capacity of a selected transfer line and a second load value of a first switch of the transfer line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line; determining whether the tie switch receives a fault isolation success signal sent by a downstream switch and is in a single-side voltage loss state, and judging whether the tie switch continuously forwards signals (including the fault isolation success signal and the first load quantity) to a head switch of a transfer line; after the transfer line head switch receives a fault isolation success signal, calculating a transfer allowable load value of the transfer line according to the power capacity of the transfer line and a second load value of the head switch of the transfer line; comparing the first load value with the transfer allowable load value, and judging whether a transfer line head switch sends a transfer allowable signal according to a comparison result; and determining whether the interconnection switch receives the transfer permission signal and is in a single-side voltage-losing state, judging whether the interconnection switch acts to close or not, and recovering the power supply of the non-fault area. Compared with the prior art, the invention determines whether the transfer is carried out by comparing the transfer allowable load value of the transfer line with the first load value before the downstream switch is switched off, can effectively solve the problem of overload of the transfer line caused by the fact that the load bearing capacity of the transfer line is not considered in the existing load transfer, and improves the reliability and safety of power supply of a power grid.
Embodiment two:
embodiment two is a preferred embodiment of embodiment one, which differs from embodiment one in that the specific steps of the distributed FA forwarding method that take into account the line load capacity are refined:
as shown in fig. 2, in this embodiment, a distributed FA transferring method considering line loading capability is disclosed, which includes the following steps:
step 1, fault point positioning and isolation: when a line fails, for any switch node A, if the switch node A detects failure information and only one node of adjacent switch nodes does not send out the failure information, judging that the switch node A is positioned at the upstream of the failure point, and controlling the switch node A to act: disconnecting from the downstream failure point;
for any switch node B, if the switch node B does not detect the fault information and only one adjacent switch has fault information, judging that the switch node B is positioned at the downstream of the fault point, and controlling the action of the switch node B for the downstream switch: cutting off the connection with the upstream fault point and sending out a fault isolation success signal;
step 2, forwarding a fault isolation success signal and a first load value before isolation of a downstream switch:
when the connection with the upstream fault point is cut off, the downstream switch (hereinafter referred to as an isolation point switch) also transmits a fault isolation success signal and first load value information before the disconnection of the fault isolation success signal to the adjacent side switch;
the adjacent side switch forwards the fault isolation success signal and the first load value to the next stage, namely a contact point switch of the selected transfer line;
step 3, forwarding of a contact point switch:
the tie-point switch receives the fault isolation success signal and the first load value, detects and judges whether the fault isolation success signal and the first load value are in a single-side voltage-losing state, and if the fault isolation success signal and the first load value are in the single-side voltage-losing state, the fault isolation success signal and the first load value are continuously forwarded to the first switch of the selected transfer line;
if the fault isolation success signal is not in the single-side voltage loss state, stopping forwarding the fault isolation success signal and the first load magnitude value
Step 4, the action of the first switch of the non-fault line (selected transfer line):
the first switch of the non-fault line judges whether the contact point switch meets the action condition, and the judgment logic is as follows:
(1) The first switch receives a fault isolation success signal;
(2) The first switch receives the load value before the action of the isolating point switch (namely, the first load value before the downstream switch is opened);
(3) The first switch obtains the transfer supply allowable load quantity, the calculation formula is that the transfer supply allowable load quantity=power supply capacity-first switch load quantity, the load quantity collected by the first switch of the transfer supply line basically covers the load quantity of the whole line, the load carrying capacity of the line is judged to be most accurate through the first switch of the connecting line, and the load quantity value of the first switch is particularly a load value adjacent to the fault moment;
(4) And comparing the transfer allowable load value with the load value before the action of the isolating point switch, and if the transfer allowable load value is larger than the load value before the action of the isolating point switch, sending a transfer signal allowing the connecting point to transfer to the connecting point switch by the head switch, and stopping transferring after the transfer signal allowing the connecting point to transfer to the connecting point.
And if the contact point switch is still in the single-side voltage loss state, the contact point switch is switched on, and the transfer is completed.
If the number of the contact point switches is more than one, a contact point transfer permission signal is sent to the corresponding contact point switches, after the contact point switches receive the contact point transfer permission signals, the priority of the contact points is determined according to the topological relation of the circuit, the contact points with high priority are switched on preferentially, when the contact points with high priority are out of order and are not switched on, the second priority contact point is switched on, and the like. The priority is configured and determined in advance according to the time-delay closing, and after the closing with high priority, the contact points with low priority are pressed at two sides within the time-delay closing time, so that the closing condition is not met.
(5) After receiving the signal for allowing the transfer of the contact point, the contact point switch is still in a single-side voltage loss state after time delay, and then the contact point switch is switched on to finish the transfer.
Example III
The circuit topology diagram of the third embodiment is shown in fig. 3, and is a three-power-source two-contact-point structure, wherein the 3L02 transfer time is set to 5 seconds, and the 7L02 transfer time is set to 7 seconds;
at the moment, faults occur between 2L02 and 3L01, and according to intelligent distributed FA action logic, the 2L02 and 3L01 switches are switched off to complete fault positioning and isolation, and meanwhile, the 3L01 will send out fault isolation success signals.
3L01 transmits fault isolation success signals and load quantity before the switch acts to the adjacent side switch, and then the fault isolation success signals and the load quantity are transmitted, when the signals are transmitted to the 3L02,7L02 switch, the switch is in a single-side voltage loss state, the continuous transmission condition is met, and the fault isolation success signals and the load quantity before the switch act are continuously transmitted to the two head switches 5L02,6L01.
Judging whether the first switch sends a transfer allowance signal according to the load relation:
(1) If the transfer allowable load of 5L02 is larger than the load before the 3L01 switch operates and the transfer allowable load of 6L01 is smaller than the load before the 3L01 switch operates, the 5L02 generates a transfer allowable signal, the transfer allowable signal is transferred to the 3L02, after 5 seconds of delay, the 3L02 is still in a unilateral decompression state at the moment, the 3L02 is switched on, and transfer is completed.
(2) If the transfer allowable load quantity of 5L02 is smaller than the load quantity before the 3L01 switch action and the transfer allowable load quantity of 6L01 is larger than the load quantity before the 3L01 switch action, 6L01 generates a transfer allowable signal and transfers the transfer allowable signal to 7L02, after 7 seconds delay, 7L02 is still in a unilateral decompression state at the moment, 7L02 is switched on, and transfer is completed.
(3) If the allowable load of transfer of 5L02 is greater than the load before the 3L01 switch is operated and the allowable load of transfer of 6L01 is greater than the load before the 3L01 switch is operated, 5L02,6L01 generates transfer allowing signals which are respectively forwarded to 3L02,7L02, 3L02 is still in a single-side decompression state after 5 seconds of delay, 3L02 is switched on, 7L02 does not meet the single-side decompression at this time, and 7L02 is not switched on to finish transfer.
(4) If the allowable transfer load of 5L02 is smaller than the load before the 3L01 switching operation, and the allowable transfer load of 6L01 is smaller than the load before the 3L01 switching operation, no allowable transfer signal is generated by 5L02,6L01, and 3L02,7L02 is not closed.
In summary, the distributed FA transferring method, system and storage medium taking the line load capacity into consideration in the present invention determine that an upstream switch and a downstream switch of a fault point isolate the fault point by locating the fault point; collecting a first load value before opening of a downstream switch, the power supply capacity of a selected transfer line and a second load value of a first switch of the transfer line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line; determining whether the tie switch receives a fault isolation success signal sent by a downstream switch and is in a single-side voltage loss state, and judging whether the tie switch continuously forwards signals (including the fault isolation success signal and the first load quantity) to a head switch of a transfer line; after the transfer line head switch receives a fault isolation success signal, calculating a transfer allowable load value of the transfer line according to the power capacity of the transfer line and a second load value of the head switch of the transfer line; comparing the first load value with the transfer allowable load value, and judging whether a transfer line head switch sends a transfer allowable signal according to a comparison result; and determining whether the interconnection switch receives the transfer permission signal and is in a single-side voltage-losing state, judging whether the interconnection switch acts to close or not, and recovering the power supply of the non-fault area. Compared with the prior art, the invention determines whether the transfer is carried out by comparing the transfer allowable load value of the transfer line with the first load value before the downstream switch is switched off, can effectively solve the problem of overload of the transfer line caused by the fact that the load bearing capacity of the transfer line is not considered in the existing load transfer, and improves the reliability and safety of power supply of a power grid.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A distributed FA transfer method taking line load capacity into consideration, comprising the steps of:
positioning a fault point, and determining an upstream switch and a downstream switch of the fault point to isolate the fault point;
acquiring a first load value before the downstream switch is opened, the power capacity of a selected transfer line and a second load value of a first switch of the transfer line;
calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line;
comparing a first load value with a transfer allowable load value, judging whether a communication switch corresponding to a transfer line is in a single-side voltage loss state, and controlling the communication switch to switch on to finish transfer if the first load value is smaller than or equal to the transfer allowable load value and the communication switch is in the single-side voltage loss state;
before calculating the transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the head switch of the transfer line, the method further comprises the following steps:
after isolating faults, the downstream switch sends a fault isolation success signal and first load value information before switching off the fault isolation success signal to the adjacent side switch;
the adjacent side switch forwards the fault isolation success signal and the first load value to a contact point switch of a selected transfer line, and the contact point switch receives the fault isolation success signal and the first load value and judges whether the adjacent side switch is in a switching-off state or not and whether the adjacent side switch is in single-side voltage loss or not:
if the interconnection switch is in a switching-off state and one side is out of voltage, judging whether the first load value of the downstream switch and the fault isolation success signal of the downstream switch are allowed to be forwarded to a head switch of the transfer line;
if the interconnection switch is in a closing state or has no single-side voltage loss signal, judging that the first load value of the downstream switch and the downstream switch fault isolation success signal are stopped to be forwarded to the head switch of the transfer line;
and after the downstream switch fault isolation success signal and the first load quantity received by the head switch, calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the head switch.
2. The distributed FA switching method considering line load capacity according to claim 1, wherein the second load is a total load of a downstream line measured by a terminal before a switching line head switch receives fault isolation success, and a power supply capacity is a maximum load that can be carried by the switching line; calculating a transfer allowable load value of the transfer line according to the power supply capacity of the transfer line and the second load value of the first switch of the transfer line, wherein the transfer allowable load value is realized by the following formula:
transfer allowance load magnitude = power source capacity-head switch load magnitude, wherein the head switch load magnitude must be the load value adjacent to the moment of failure.
3. The distributed FA for line load capacity considering transfer method of claim 1, wherein locating a fault point, determining upstream and downstream switches of the fault point isolate the fault point, comprising the steps of:
for any switch node A, if the switch node A detects fault information and only one side of the adjacent switch nodes does not send out the fault information, judging that the switch node A is positioned at the upstream of the fault point, and controlling the switch node A to act: disconnecting from the downstream failure point;
for any switch node B, if the switch node B does not detect the fault information and only one adjacent switch has fault information, judging that the switch node B is positioned at the downstream of the fault point, and controlling the action of the switch node B for the downstream switch: and cutting off the connection with the upstream fault point.
4. The distributed FA switching method considering line load capacity according to claim 3, further comprising the steps of, after the head switch calculates a switching permission load value of the switching line according to a power capacity of the switching line and a second load value of the head switch thereof:
the head switch obtains and calculates a transfer allowance load value of the transfer line according to the power capacity of the transfer line and a second load value of the head switch;
the first switch compares the first load value with the transfer allowable load value, and if the transfer allowable load value is larger than the load value before the action of the isolating point switch, the first switch sends a transfer signal of allowing the connecting point to transfer to the connecting point switch;
after receiving the signal for allowing the transfer of the contact point, the contact point switch judges whether the contact point switch is still in a single-side voltage-losing state or not through time delay, and if the contact point switch is still in the single-side voltage-losing state, the contact point switch is switched on to finish transfer.
5. The distributed FA for line load capacity considering transfer method as recited in claim 4, further comprising the step of, when said transfer head switch is determined to send a transfer enable signal:
if the number of the contact point switches is more than 2, the head switches respectively send the allowed contact points to the corresponding contact point switches, and after each contact point switch receives the signals for transferring the allowed contact points, the priority of each contact point switch is determined according to the topological relation of the circuit and the time length of the delay switching-on, wherein the shorter the delay switching-on is, the higher the priority is;
and the contact points with high priority and no failure finish the closing action, and other contact points with low priority can have pressure at both sides within the time delay closing time and do not finish the closing action.
6. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of the preceding claims 1 to 5 when the computer program is executed by the processor.
7. A computer storage medium having stored thereon a computer program, characterized in that the program when executed by a processor realizes the steps of the method of any of the preceding claims 1 to 5.
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Citations (7)
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