CN111030289A

CN111030289A - Self-adaptive standby power supply automatic switching method and device for 220kV double-bus section wiring

Info

Publication number: CN111030289A
Application number: CN201911371538.2A
Authority: CN
Inventors: 乔中伟; 钱敏; 王世祥; 袁志军; 钟叶斌; 王从威; 黎健锵
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-17

Abstract

The invention provides a self-adaptive standby power supply automatic switching method for 220kV double-bus section wiring, which comprises the following steps: the self-adaptive standby power supply automatic switching device of the 220kV double-bus section wiring detects the current bus operation mode of the 220kV double-bus section wiring transformer substation; the self-adaptive standby power supply automatic switching device for 220kV double-bus sectional wiring obtains a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cuts off the main supply line connected with the voltage-loss bus, and executes corresponding preset priority to select the obtained standby switching line and/or the standby switching element to be automatically switched in sequence after preset cut-off time is reached until the voltage of the voltage-loss bus is recovered. By implementing the method, the voltage of the bus of the 220kV double-bus section wiring transformer substation in different operation modes can be reduced, the self-adaptive intelligent input of the standby power supply is realized, and the power supply reliability of a power grid is improved.

Description

Self-adaptive standby power supply automatic switching method and device for 220kV double-bus section wiring

Technical Field

The invention relates to the technical field of transformer substation relay protection, in particular to a self-adaptive standby power supply automatic switching method and device for 220kV double-bus section wiring.

Background

At present, the technical measures for improving the power supply reliability are continuously explored for the domestic high-load-density urban power grid, the current mainstream method is to improve the power supply reliability of the region by improving the power supply radius of a distribution network and the flexibility of the operation mode of the power grid, and a design scheme of a transformer substation adopting 220kV double-bus section wiring and 220kV direct-reduction 20kV is also produced.

The double-bus section wiring enables the system operation mode to be more flexible, but also provides new design requirements for the 220kV standby power supply automatic switching device. The double-bus-section wiring has the problems of a spare power switching mode and selection of spare power switching elements when buses run in a split-row mode and a parallel mode, and the existing spare power switching logic cannot meet the spare power switching requirements of the double-bus-section wiring.

At present, a 220kV standby power supply automatic switching device of a 220kV double-bus-section wiring transformer substation in a system generally adopts a bus-tie (or section) standby switching mode, and standby switching logic is not rich enough and has certain limitation.

Therefore, an urgent need exists for a self-adaptive standby power supply automatic switching device for 220kV double-bus-section wiring, which can realize self-adaptive intelligent investment of a standby power supply to bus voltage loss of a 220kV double-bus-section wiring transformer substation in different operation modes, thereby improving the power supply reliability of a power grid.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a self-adaptive standby power supply automatic switching method and device for 220kV double-bus section wiring, which can realize self-adaptive intelligent switching of a standby power supply to the bus voltage loss of a 220kV double-bus section wiring transformer substation in different operation modes, thereby improving the power supply reliability of a power grid.

In order to solve the above technical problem, an embodiment of the present invention provides an adaptive standby power source automatic switching method for 220kV double-bus-section wiring, which is used for realizing that an adaptive standby power source automatic switching device for 220kV double-bus-section wiring controls automatic switching of a standby power source on a 220kV double-bus-section wiring substation connected with the adaptive standby power source automatic switching device, and includes the following steps:

the self-adaptive standby power supply automatic switching device of the 220kV double-bus section wiring detects the current bus operation mode of the 220kV double-bus section wiring transformer substation; the bus operation modes comprise a single-bus split operation mode, a double-bus parallel operation mode, a three-section bus parallel operation mode and a four-section bus parallel operation mode;

the self-adaptive standby power supply automatic switching device for 220kV double-bus sectional wiring acquires a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cuts off the main supply line connected with the voltage-loss bus, and executes corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in sequence after preset cut-off time is reached until the voltage of the voltage-loss bus is recovered.

The self-adaptive standby power supply automatic switching device for 220kV double-bus section wiring acquires a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cuts off the main supply line connected with the voltage-loss bus, and executes corresponding preset priority to select the acquired standby switching line and/or the standby switching element to be automatically switched in sequence after preset cut-off time is reached until the voltage of the voltage-loss bus is restored, and the specific steps comprise:

the self-adaptive standby power supply automatic switching device for the 220kV double-bus sectional wiring obtains a voltage-loss bus and a main supply line connected with the voltage-loss bus in a single-bus split operation mode, and judges whether the voltage-loss bus has a standby switching line and/or a standby switching element;

if the condition that only one spare switching line exists in the voltage-loss bus is judged, cutting off a main supply line connected with the voltage-loss bus before the preset cutting-off cut-off time is reached, and directly selecting the spare switching line to automatically switch on to enable the voltage of the voltage-loss bus to be recovered after the preset cutting-off cut-off time is reached;

if the voltage-loss bus is judged to have a plurality of standby switching lines, the main supply line connected with the voltage-loss bus is cut off before the preset cut-off time is reached, and the preset first line standby switching priority is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cut-off time is reached until the voltage of the voltage-loss bus is restored;

if the voltage-loss bus only has one spare switching element, cutting off a main supply line connected with the voltage-loss bus before the preset cutting off cut-off time is reached, and directly selecting the spare switching element to automatically switch on to enable the voltage-loss bus to recover the voltage after the preset cutting off cut-off time is reached;

if the voltage-loss bus is judged to have a plurality of spare switching elements, cutting off a main supply line connected with the voltage-loss bus before the preset cutting off cut-off time is reached, and executing a preset first element spare switching priority to select corresponding spare switching elements to be automatically switched in sequence after the preset cutting off cut-off time is reached until the voltage of the voltage-loss bus is restored;

if the fact that at least one spare switching element and at least one spare switching line exist in the voltage-loss bus at the same time is judged, the main supply line connected with the voltage-loss bus is cut off before the preset cut-off time is reached, and after the preset cut-off time is reached, the preset first element spare switching priority is executed firstly to select the corresponding spare switching elements to be automatically switched in sequence, and then the preset first line spare switching priority is executed to select the corresponding spare switching lines to be automatically switched in sequence until the voltage of the voltage-loss bus is recovered.

The self-adaptive standby power supply automatic switching device for 220kV double-bus section wiring acquires a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cuts off the main supply line connected with the voltage-loss bus, and executes corresponding preset priority to select the acquired standby switching line and/or the standby switching element to be automatically switched in sequence after preset cut-off time is reached until the voltage of the voltage-loss bus is restored, wherein the specific steps further comprise:

the self-adaptive standby power supply automatic switching device for 220kV double-bus sectional wiring acquires two voltage-loss buses and main supply lines connected with the two voltage-loss buses in a double-bus parallel operation mode, and judges whether the two voltage-loss buses have backup switching lines and/or backup switching elements;

if the two voltage-loss buses only have one spare switching line, cutting off the main supply lines connected with the two voltage-loss buses before the preset cutting-off cut-off time is reached, and directly selecting the spare switching line to automatically switch on to enable the two voltage-loss buses to recover the voltage after the preset cutting-off cut-off time is reached;

if the two voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the two voltage-loss buses are all cut before the preset cut-off time is reached, and the standby switching priority of a preset second line is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cut-off time is reached until the two voltage-loss buses recover the voltage;

if the two voltage-loss buses only have one spare switching element, cutting off the main supply lines connected with the two voltage-loss buses before the preset cutting-off cut-off time is reached, and directly selecting the spare switching element to automatically switch on to enable the two voltage-loss buses to recover the voltage after the preset cutting-off cut-off time is reached;

if the two voltage-loss buses are judged to have a plurality of spare switching elements, cutting off the main supply lines connected with the two voltage-loss buses before the preset cutting-off cut-off time is reached, and executing a preset second element spare switching priority to select corresponding spare switching elements to be automatically switched in sequence after the preset cutting-off cut-off time is reached until the two voltage-loss buses recover the voltage;

if it is determined that at least one spare switching element and at least one spare switching line exist in the two voltage-loss buses at the same time, the main supply lines connected with the two voltage-loss buses are all cut before the preset cut-off time is reached, and after the preset cut-off time is reached, the preset second element spare switching priority is executed firstly to select the corresponding spare switching elements to be automatically switched in sequence, and then the preset second line spare switching priority is executed to select the corresponding spare switching lines to be automatically switched in sequence until the two voltage-loss buses recover the voltage.

the self-adaptive standby power supply automatic switching device for the 220kV double-bus sectional connection obtains three voltage-loss buses and main supply lines connected with the three voltage-loss buses in a parallel operation mode of the three buses, and judges whether the three voltage-loss buses have backup switching lines and/or backup switching elements;

if only one spare switching line exists in the three voltage-loss buses, cutting off all main supply lines connected with the three voltage-loss buses before the preset cutting-off cut-off time is reached, and directly selecting the spare switching line to automatically switch on to enable the three voltage-loss buses to recover the voltage after the preset cutting-off cut-off time is reached;

if the three voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the three voltage-loss buses are all cut before the preset cut-off time is reached, and the standby switching priority of a preset third line is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cut-off time is reached until the three voltage-loss buses recover the voltage;

if only one spare switching element exists in the three voltage-loss buses, cutting off all main supply lines connected with the three voltage-loss buses before the preset cutting-off cut-off time is reached, and directly selecting the spare switching element to automatically switch on to enable the three voltage-loss buses to recover the voltage after the preset cutting-off cut-off time is reached;

if the fact that a plurality of spare switching elements exist in the three voltage-loss buses is judged, all main supply lines connected with the three voltage-loss buses are cut before the preset cutting off time is reached, and after the preset cutting off time is reached, a preset third element spare switching priority is executed to select corresponding spare switching elements to be automatically switched in sequence until the three voltage-loss buses recover voltage;

if the fact that at least one spare switching element and at least one spare switching line exist in the three voltage-loss buses at the same time is judged, all main supply lines connected with the three voltage-loss buses are cut before the preset cutting off-time is reached, and after the preset cutting off-time is reached, the preset third element spare switching priority is executed firstly to select the corresponding spare switching elements to be automatically switched in sequence, and then the preset third line spare switching priority is executed to select the corresponding spare switching lines to be automatically switched in sequence until the three voltage-loss buses recover voltage.

the self-adaptive standby power supply automatic switching device of the 220kV double-bus sectional connection line obtains four voltage-loss buses and main supply lines connected with the four voltage-loss buses in a parallel operation mode of the four buses, and judges whether the four voltage-loss buses have standby switching lines or not;

if the four voltage-loss buses only have one spare switching line, cutting off all main supply lines connected with the four voltage-loss buses before the preset cutting-off cut-off time is reached, and directly selecting the spare switching line to automatically switch on to enable the four voltage-loss buses to recover the voltage after the preset cutting-off cut-off time is reached;

and if the four voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the four voltage-loss buses are all cut before the preset cutting off deadline time is reached, and the preset fourth line standby switching priority is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cutting off deadline time is reached until the four voltage-loss buses recover the voltage.

The embodiment of the invention also provides a self-adaptive standby power supply automatic switching device for 220kV double-bus section wiring, which comprises a bus operation mode detection unit and a standby power supply automatic switching unit; wherein the content of the first and second substances,

the bus operation mode detection unit is used for detecting the current bus operation mode of the 220kV double-bus section wiring transformer substation; the bus operation modes comprise a single-bus split operation mode, a double-bus parallel operation mode, a three-section bus parallel operation mode and a four-section bus parallel operation mode;

the standby power supply automatic switching unit is used for a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cutting off the main supply line connected with the voltage-loss bus, and executing corresponding preset priority to select the obtained standby switching line and/or the standby switching element to be sequentially and automatically switched on after the preset cutting off-time is reached until the voltage of the voltage-loss bus is recovered.

Wherein, the stand-by power supply automatic switching unit includes:

the single-bus voltage loss acquisition module is used for acquiring a voltage loss bus and a main supply line connected with the voltage loss bus in a single-bus split operation mode and judging whether the voltage loss bus has a standby switching line and/or a standby switching element;

the first standby switching recovery single bus voltage loss module is used for cutting off a main supply line connected with the voltage loss bus before the preset cutting off cut-off time is reached and directly selecting the standby switching line to automatically switch on so as to recover the voltage of the voltage loss bus after the preset cutting off cut-off time is reached if the voltage loss bus is judged to have only one standby switching line;

the second backup switching recovery single bus voltage loss module is used for cutting off a main supply line connected with the voltage loss bus before the preset cutting off-time is reached and executing a preset first line backup switching priority to select corresponding backup switching lines to be automatically switched in sequence after the preset cutting off-time is reached until the voltage of the voltage loss bus is recovered;

the third spare power switching recovery single bus voltage loss module is used for cutting off a main power supply line connected with the voltage loss bus before the preset cutting off cut-off time is reached and directly selecting a spare power switching element to automatically switch on so as to recover the voltage of the voltage loss bus after the preset cutting off cut-off time is reached if the voltage loss bus is judged to have only one spare power switching element;

the fourth spare power switching recovery single bus voltage loss module is used for cutting off a main supply line connected with the voltage loss bus before the preset cutting off-time is reached and executing a preset first element spare power switching priority to select corresponding spare power switching elements to be automatically switched in sequence after the preset cutting off-time is reached until the voltage of the voltage loss bus is recovered;

and the fifth spare power switching recovery single bus voltage loss module is used for cutting off the main supply line connected with the voltage loss bus before the preset cutting off-time is reached if the voltage loss bus is judged to have at least one spare power switching element and at least one spare power switching line at the same time, executing the preset first element spare power switching priority to select the corresponding spare power switching elements to be sequentially and automatically switched on at first, and then executing the preset first line spare power switching priority to select the corresponding spare power switching lines to be sequentially and automatically switched on until the voltage of the voltage loss bus is recovered.

Wherein, the stand-by power supply automatic switching unit further comprises:

the double-bus voltage loss acquisition module is used for acquiring two voltage loss buses and main supply lines connected with the two voltage loss buses in a double-bus parallel operation mode and judging whether the two voltage loss buses have backup switching lines and/or backup switching elements;

the first standby switching recovery double-bus voltage loss module is used for cutting off main supply lines connected with the two voltage loss buses before the preset cutting off time is reached and directly selecting the standby switching lines to automatically switch on to enable the two voltage loss buses to recover voltage after the preset cutting off time is reached if the two voltage loss buses are judged to have only one standby switching line;

the second backup switching recovery double-bus voltage loss module is used for cutting off main supply lines connected with the two voltage loss buses before the preset cutting off-time is reached if the two voltage loss buses are judged to have a plurality of backup switching lines, and executing a preset second line backup switching priority to select corresponding backup switching lines to be automatically switched in sequence after the preset cutting off-time is reached until the two voltage loss buses recover the voltage;

the third spare power switching recovery double-bus voltage loss module is used for cutting off main power supply lines connected with the two voltage loss buses before the preset cutting off cut-off time is reached and directly selecting the spare power switching components to automatically switch on to enable the two voltage loss buses to recover voltage after the preset cutting off cut-off time is reached if the two voltage loss buses are judged to have only one spare power switching component;

the fourth spare power switching recovery double-bus voltage loss module is used for cutting off main power supply lines connected with the two voltage loss buses before the preset cutting off-time is reached if the two voltage loss buses are judged to have a plurality of spare power switching elements, and executing a preset second element spare power switching priority to select the corresponding spare power switching elements to be automatically switched in sequence after the preset cutting off-time is reached until the two voltage loss buses recover the voltage;

and the fifth spare power switching recovery double-bus voltage loss module is used for cutting off the main supply lines connected with the two voltage loss buses before the preset cutting off deadline is reached if the two voltage loss buses are judged to have at least one spare power switching element and at least one spare power switching line at the same time, executing the preset second element spare power switching priority to select the corresponding spare power switching elements to be sequentially and automatically switched on at first, and executing the preset second line spare power switching priority to select the corresponding spare power switching lines to be sequentially and automatically switched on until the two voltage loss buses recover the voltage.

Wherein, the stand-by power supply automatic switching unit further comprises:

the three-bus voltage loss acquisition module is used for acquiring three voltage loss buses and main supply lines connected with the three voltage loss buses respectively in a three-bus parallel operation mode and judging whether the three voltage loss buses have backup switching lines and/or backup switching elements;

the first standby switching recovery three-bus voltage loss module is used for cutting off all main supply lines connected with the three voltage loss buses before the preset cutting off time is reached if only one standby switching line exists in the three voltage loss buses, and directly selecting the standby switching line to automatically switch on to enable the three voltage loss buses to recover voltage after the preset cutting off time is reached;

the second standby switching recovery three-bus voltage loss module is used for cutting off all main supply lines connected with the three voltage loss buses before the preset cutting off-time is reached if the three voltage loss buses are judged to have a plurality of standby switching lines, and executing a preset third line standby switching priority to select corresponding standby switching lines to be automatically switched in sequence after the preset cutting off-time is reached until the three voltage loss buses recover the voltage;

the third spare power switching recovery three-bus voltage loss module is used for cutting off all main power supply lines connected with the three voltage loss buses before the preset cutting off cut-off time is reached if only one spare power switching element exists in the three voltage loss buses, and directly selecting the spare power switching element to automatically switch on to enable the three voltage loss buses to recover voltage after the preset cutting off cut-off time is reached;

the fourth spare power switching recovery three-bus voltage loss module is used for cutting off all main power supply lines connected with the three voltage loss buses before the preset cutting off-time is reached if the three voltage loss buses are judged to have a plurality of spare power switching elements, and executing a preset third element spare power switching priority to select corresponding spare power switching elements to be automatically switched in sequence after the preset cutting off-time is reached until the three voltage loss buses recover the voltage;

and the fifth backup switching recovery three-bus voltage loss module is used for cutting off all main supply lines connected with the three voltage loss buses before the preset cutting off-time is reached if the three voltage loss buses are judged to have at least one backup switching element and at least one backup switching line at the same time, executing the preset third element backup switching priority to select the corresponding backup switching elements to be sequentially and automatically switched on first, and then executing the preset third line backup switching priority to select the corresponding backup switching lines to be sequentially and automatically switched on until the three voltage loss buses recover the voltage.

Wherein, the stand-by power supply automatic switching unit further comprises:

the four-busbar voltage loss acquisition module is used for acquiring four voltage loss busbars and main supply lines connected with the four voltage loss busbars in a parallel operation mode of the four busbars and judging whether the four voltage loss busbars have backup switching lines or not;

the first standby switching recovery four-bus voltage loss module is used for cutting off all main supply lines connected with the four voltage loss buses before the preset cutting off time is reached and directly selecting the standby switching lines to automatically switch on to enable the four voltage loss buses to recover voltage after the preset cutting off time is reached if the four voltage loss buses are judged to have only one standby switching line;

and the second spare power switching recovery four-bus voltage loss module is used for cutting off all main supply lines connected with the four voltage loss buses before the preset cutting off deadline is reached and executing a preset fourth line spare power switching priority to select corresponding spare power switching lines to be automatically switched in sequence after the preset cutting off deadline is reached until the four voltage loss buses recover the voltage if the four voltage loss buses have a plurality of spare power switching lines.

The embodiment of the invention has the following beneficial effects:

the method distinguishes the selection of the standby power supply under different bus operation modes, and realizes the selection of the standby power supply mode and the standby switching element under different bus operation modes (such as single bus split operation and multi-section bus parallel operation) according to the priority of the standby switching line and the standby switching element, thereby realizing the bus voltage loss of the 220kV double-bus split-connection transformer substation under different operation modes, realizing the self-adaptive intelligent switching of the standby power supply and improving the power supply reliability of a power grid.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.

Fig. 1 is a flowchart of an adaptive standby power source automatic switching method for 220kV double-bus-section wiring according to an embodiment of the present invention;

fig. 2 is a schematic primary wiring diagram of a 220kV double-bus-section wiring substation in an adaptive standby power source automatic switching method for 220kV double-bus-section wiring according to an embodiment of the present invention;

fig. 3 is an action logic diagram of a priority backup power switching mode in an adaptive backup power automatic switching method for 220kV double-bus segment connection according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an adaptive standby power source automatic switching device for 220kV double-bus segment wiring according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the adaptive standby power automatic switching method for 220kV double-bus-section wiring provided in the embodiment of the present invention is used to implement automatic switching control of a standby power on a 220kV double-bus-section wiring substation (as shown in fig. 2) connected to the adaptive standby power automatic switching apparatus for 220kV double-bus-section wiring; the self-adaptive standby power supply automatic switching device for 220kV double-bus section wiring can be connected with switches (such as 2012 bus-coupled switches, 2015 section switches and the like) of all intervals (such as outgoing line intervals, bus-coupled intervals, section intervals, outgoing line intervals of adjacent buses, bus-coupled intervals of adjacent buses and the like) on a 220kV double-bus section wiring substation, and also connected with disconnecting links (such as two disconnecting links (such as symbols of a line 1) connected with respective buses) of all intervals (such as a line 1

-) is connected with 1M and 2M buses, and a circuit 5 is connected with 5M and 6M buses and the like through two disconnecting switches), so that the on-off control of a power supply passage is realized, and the action logic control of the automatic switching of the standby power supply can be realized;

the method comprises the following steps:

step S1, detecting the current bus operation mode of the 220kV double-bus-section wiring transformer substation by the self-adaptive standby power supply automatic switching device of the 220kV double-bus-section wiring; the bus operation modes comprise a single-bus split operation mode, a double-bus parallel operation mode, a three-section bus parallel operation mode and a four-section bus parallel operation mode;

and S2, the self-adaptive standby power supply automatic switching device of the 220kV double-bus section wiring acquires a voltage-loss bus and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus under the current bus operation mode, further cuts off the main supply line connected with the voltage-loss bus, and executes corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in sequence after preset cut-off time is reached until the voltage of the voltage-loss bus is restored.

The specific process is that in step S1, the self-adaptive standby power supply automatic switching device for 220kV double-bus section connection can detect that the current bus operation mode of the 220kV double-bus section connection substation is one of a single-bus split operation mode, a double-bus parallel operation mode, a three-section bus parallel operation mode and a four-section bus parallel operation mode.

In step S2, according to the four bus operation modes, the adaptive standby power source automatic switching device of the 220kV double-bus-section connection may form corresponding four automatic switching strategies to recover the voltage of the voltage-loss bus, which is specifically as follows:

(1) the single bus split operation mode: the self-adaptive standby power supply automatic switching device for 220kV double-bus sectional wiring obtains a voltage-loss bus and a main supply line connected with the voltage-loss bus in a single-bus split operation mode, and judges whether the voltage-loss bus has a standby switching line and/or a standby switching element;

if the condition that only one spare switching line exists in the voltage-loss bus is judged, cutting off a main supply line connected with the voltage-loss bus before the preset cutting-off cut-off time (such as a given time length T1) is reached, and directly selecting the spare switching line to automatically switch on to enable the voltage of the voltage-loss bus to be recovered after the preset cutting-off cut-off time is reached;

if the voltage-loss bus only has one spare switching element, cutting off a main supply circuit connected with the voltage-loss bus before the preset cutting off cut-off time is reached, and directly selecting the spare switching element to automatically switch on to enable the voltage of the voltage-loss bus to be recovered after the preset cutting off cut-off time is reached;

if the voltage-loss bus is judged to have a plurality of spare switching elements, cutting off a main supply line connected with the voltage-loss bus before the preset cutting off cut-off time is reached, and executing a preset first element spare switching priority to select corresponding spare switching elements to be automatically switched in sequence after the preset cutting off cut-off time is reached until the voltage of the voltage-loss bus is recovered;

It should be noted that the main supply line needs to satisfy the following conditions: the circuit overhauls clamp plate and withdraws from, the circuit switch closes the position (or circuit three phase current is greater than there has a current definite value), the circuit interval has the generating line sword to close the position, can differentiate the main supply circuit to belong to which generating line through switch position and circuit affiliated generating line group.

The available route can meet the following conditions: the circuit overhauls the clamp plate and withdraws from, line switch is in the branch position (promptly break), circuit TYD voltage is greater than and has had the definite value, the circuit interval has the bus sword to close the position (promptly closed), single-bus branch row operation mode this moment through the switch position (if open the circuit through the opto-coupler and gather circuit interval's bus knife switch position and realize) and circuit affiliated bus group can differentiate can, and other three kinds of parallel operation modes just need can differentiate through switch position and circuit affiliated bus group that the switching line belongs to which bus or which bus group.

The spare part needs to satisfy the following conditions: the corresponding maintenance pressing plate is withdrawn, the switch is positioned at the branch position, the buses at the two sides of the switch are both provided with pressure, and the bus-coupled (or segmented) switch capable of being switched fully belongs to the running buses at the two sides of the bus-coupled (or segmented) switch.

In one embodiment, in fig. 2, when the 2012 bus tie switch and the 2015 section switch are equally positioned, the 1M bus is operated in a split row, once the 1M bus is decompressed, the following recovery conditions are specifically adopted:

if only one spare switching line can be adopted on the 1M bus, the voltage of the 1M bus can be recovered by switching the spare switching line;

if only line backup switching can be adopted on the 1M bus and a plurality of backup switching lines exist, namely when a plurality of (more than 1) backup switching lines exist, a backup switching sequence needs to be set (for example, the backup switching priority of a first line is represented by a backup switching priority fixed value item (for example, control words 1, 2 and 3 are provided, the smaller the number is, the higher the priority is), only one backup switching mode is allowed to act at the moment, and the purpose of recovering the voltage of the 1M bus can be achieved by switching the latter backup switching mode again after the backup switching failure of the priority backup switching mode;

if only spare power switching can be adopted on the 1M bus and only one spare power switching element (such as only a 2012 bus tie switch) is provided, the 1M bus voltage is recovered directly through the spare power switching element (the 2012 bus tie switch is turned on and utilizes the 2M bus voltage);

if only spare power switching can be performed on the 1M bus and there are multiple spare power switching devices, that is, if there are multiple (greater than 1) spare power switching devices (for example, the 1M bus voltage can be restored by closing the 2012 bus tie switch or the 2015 section switch), then the spare power switching sequence needs to be set (for example, the first spare power switching priority is represented by a spare power switching priority fixed value item (for example, the control words 1, 2, and 3 are higher when the number is smaller), only one spare power switching mode is allowed to operate at this time, and after the spare power switching of the spare power switching mode (for example, the closing 2012 bus tie switch uses 2M bus voltage), the latter spare power switching mode (for example, the closing 2015 section switch uses 5M bus voltage) is put into again to achieve the purpose of restoring the 1M bus voltage;

if a plurality of backup switching elements can be used on the 1M bus to realize the backup switching of the elements, or a plurality of backup switching lines can be used to realize the backup switching of the lines, a backup switching sequence needs to be set (for example, the first element backup switching priority 0 is executed first, and then the first line backup switching priority 1 is executed), at this time, only one backup switching mode is allowed to operate, after the backup switching of the first backup switching mode (for example, the on-position 2012 bus gang switch uses 2M bus voltage) fails, the next backup switching mode (for example, the on-position 2015 sectional switch uses 5M bus voltage) is put in again, if the backup switching mode fails again, the next backup switching mode (for example, the backup switching line 1 on the 1M bus) is put in again, and if the backup switching mode fails continuously, the backup switching mode (for example, the backup switching line 2 on the 1M bus) is put in order to recover the 1M bus voltage.

In this way, the selection of the standby power supply during the split operation of the 2M, 5M and 6M buses can refer to the method of the 1M bus.

(2) The double-bus parallel operation mode: the self-adaptive standby power supply automatic switching device for 220kV double-bus sectional wiring acquires two voltage-loss buses and main supply lines connected with the two voltage-loss buses in a double-bus parallel operation mode, and judges whether the two voltage-loss buses have backup switching lines and/or backup switching elements;

if the two voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the two voltage-loss buses are all cut before the preset cut-off time is reached, and the preset second line standby switching priority is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cut-off time is reached until the two voltage-loss buses recover the voltage;

if the two voltage-loss buses are judged to have at least one spare switching element and at least one spare switching line at the same time, the main supply lines connected with the two voltage-loss buses are all cut before the preset cut-off time is reached, and after the preset cut-off time is reached, the preset second element spare switching priority is executed firstly to select the corresponding spare switching elements to be automatically switched in sequence, and then the preset second line spare switching priority is executed to select the corresponding spare switching lines to be automatically switched in sequence until the two voltage-loss buses recover the voltage.

It should be noted that, for the main supply line meeting conditions, the standby supply line meeting conditions, and the standby supply element meeting conditions in the double-bus parallel mode, please refer to the main supply line meeting conditions, the standby supply line meeting conditions, and the standby supply element meeting conditions in the single-bus split operation mode, and will not be described herein again.

In one embodiment, when the 2012 bus tie switch is turned on, the 2015 section switch and the 2026 section switch are turned off, and the 1M and 2M buses run in parallel, once the 1M and 2M buses are under a voltage loss state, the 1M and 2M bus voltages can be recovered by turning on the 2015 section switch or the 2026 section switch, that is, the 1M and 2M bus voltages can be recovered by the backup of backup devices such as the bus tie (or the section); and/or restoring the 1M, 2M bus voltage via a backup line on the 1M or 2M bus. Therefore, the recovery situation of the voltage loss of the 1M and 2M buses under the condition that the 1M and 2M buses operate in parallel is similar to the recovery situation of the voltage loss of the 1M buses under the condition that the 1M buses operate in a single row, and for details, the recovery situation of the voltage loss of the 1M buses is referred to, and details are not repeated here.

In this way, when 1M and 5M buses are parallel, 2M and 6M buses are parallel, and 5M and 6M buses are parallel, the selection of the standby power supply can refer to the parallel operation mode of the 1M and 2M buses.

(3) Three-section bus parallel operation mode: the self-adaptive standby power supply automatic switching device of the 220kV double-bus sectional wiring obtains three voltage-loss buses and main supply lines connected with the three voltage-loss buses in a parallel operation mode of the three buses, and judges whether the three voltage-loss buses have backup switching lines and/or backup switching elements;

if only one spare switching line exists in the three voltage-loss buses, the main supply lines connected with the three voltage-loss buses are all cut off before the preset cut-off time is reached, and the spare switching line is directly selected to be automatically switched on to enable the three voltage-loss buses to recover the voltage after the preset cut-off time is reached;

if the three voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the three voltage-loss buses are all cut off before the preset cut-off time is reached, and the preset third line standby switching priority is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cut-off time is reached until the three voltage-loss buses recover the voltage;

if only one spare switching element exists in the three voltage-loss buses, the main supply lines connected with the three voltage-loss buses are all cut off before the preset cut-off time is reached, and the spare switching element is directly selected to be automatically switched on to enable the three voltage-loss buses to recover the voltage after the preset cut-off time is reached;

if the fact that a plurality of spare switching elements exist in the three voltage-loss buses is judged, all main supply lines connected with the three voltage-loss buses are cut off before the preset cut-off time is reached, and after the preset cut-off time is reached, the preset third spare switching priority is executed to select the corresponding spare switching elements to be automatically switched in sequence until the three voltage-loss buses recover voltage;

if the fact that at least one spare switching element and at least one spare switching line exist in the three voltage-loss buses at the same time is judged, all main supply lines connected with the three voltage-loss buses are cut before the preset cutting-off cut-off time is reached, and after the preset cutting-off cut-off time is reached, the preset third element spare switching priority is executed firstly to select the corresponding spare switching elements to be automatically switched in sequence, and then the preset third line spare switching priority is executed to select the corresponding spare switching lines to be automatically switched in sequence until the three voltage-loss buses recover voltage.

It should be noted that, for the main supply line meeting conditions, the standby supply line meeting conditions, and the standby supply element meeting conditions in the three-segment bus parallel operation mode, please refer to the main supply line meeting conditions, the standby supply line meeting conditions, and the standby supply element meeting conditions in the single-bus split operation mode, and will not be described herein again.

In one embodiment, when the 2012 bus tie switches and the 2015 section switches are switched on, the 1M, 2M and 5M buses are operated in parallel, once the 1M, 2M and 5M buses are out of voltage, the 1M, 2M and 5M bus voltages can be recovered by switching on the 2015 section switches or the 2056 bus tie switches, that is, the 1M, 2M and 5M bus voltages can be recovered by the backup of backup elements such as a bus tie (or a section); and/or restoring 1M, 2M, 5M bus voltages via spare routable lines on the 1M, 2M, or 5M bus. Therefore, the recovery situation of the voltage loss of the 1M, 2M, and 5M buses in the parallel operation of the 1M, 2M, and 5M buses is similar to the recovery situation of the voltage loss of the 1M bus in the single-row operation of the 1M bus, and for details, reference is made to the recovery situation of the voltage loss of the 1M bus, which is not described herein again.

In this way, 1M, 2M and 6M buses are parallel, 1M, 5M and 6M buses are parallel, and the selection of the standby power supply during the parallel operation of the 2M, 5M and 6M buses can refer to the parallel operation mode of the 1M, 2M and 5M buses.

(4) The four-section bus parallel operation mode: the self-adaptive standby power supply automatic switching device of the 220kV double-bus sectional connection line obtains four voltage-loss buses and main supply lines connected with the four voltage-loss buses in a parallel operation mode of the four buses, and judges whether the four voltage-loss buses have standby switching lines or not;

and if the four voltage-loss buses are judged to have a plurality of standby switching lines, the main supply lines connected with the four voltage-loss buses are all cut before the preset cutting off time is reached, and the preset fourth line standby switching priority is executed to select the corresponding standby switching lines to be automatically switched in sequence after the preset cutting off time is reached until the four voltage-loss buses recover the voltage.

It should be noted that, in the four-segment bus parallel operation mode, only the standby power switching circuit exists for standby power switching to recover four voltage-loss bus voltages. At this time, the main supply line meeting the condition and the standby supply line meeting the condition in the four-segment bus parallel operation mode please refer to the main supply line meeting the condition and the standby supply line meeting the condition in the single-bus split operation mode, which will not be described herein again.

In one embodiment, when more than three switches of the 2012 bus-coupled switches, the 2015 section switches, the 2026 section switches and the 2056 bus-coupled switches are in the closed position, the 1M, 2M, 5M and 6M buses run in parallel, in such an operation mode, the closed bus-coupled switches and the section switches can not recover the voltage of the voltage-loss bus any more, and when any section of bus of 1M, 2M, 5M and 6M has a spare throw line, the 1M, 2M, 5M and 6M bus voltage can be recovered through the spare throw line.

If only one spare switching line can be used on the 1M, 2M, 5M and 6M buses, the 1M, 2M, 5M and 6M bus voltages can be recovered by switching the spare switching line;

if only line backup switching can be adopted on the 1M, 2M, 5M and 6M buses and a plurality of backup switching lines exist, namely when a plurality of (more than 1) backup switching lines exist, a backup switching sequence needs to be set (for example, the priority of backup switching on a first line is represented by a fixed value item of the priority of backup switching (for example, control words 1, 2 and 3 are provided, the priority is higher when the number is smaller), only one backup switching mode is allowed to act at the moment, and the purpose of recovering the voltages of the 1M, 2M, 5M and 6M buses can be achieved by switching in the latter backup switching mode again after the backup switching failure of the priority backup switching mode.

As shown in fig. 3, an application of an operation logic of the adaptive standby power source automatic switching device for 220kV double-bus-section wiring in the adaptive standby power source automatic switching method for 220kV double-bus-section wiring according to the embodiment of the present invention is further described:

after the action logic of the standby power supply mode is entered, ① sets an initial standby power supply priority n as 1, records the maximum number M of standby power supply as the maximum value of the standby power supply priority, ② checks whether the standby power supply element of the current priority n belongs to the standby power supply element of the voltage-loss bus, if so, checks whether load cutting is needed, ③ closes the switches of the standby power supply element, if ④ detects that the bus voltage is recovered, the standby power supply is successfully reported, step ⑥ is entered, if not, step ⑤ is entered, ⑤ makes n equal to n +1, if n is less than or equal to M, step ② is returned to continue iteration, if n is greater than M, the standby power supply is failed, step ⑥ is entered, and the action of the standby power supply mode ⑥ is completed.

As shown in fig. 4, an adaptive standby power source automatic switching device for 220kV double-bus-section wiring is further provided for the embodiment of the present invention, and includes a bus operation mode detection unit 10 and a standby power source automatic switching unit 20; wherein the content of the first and second substances,

the bus operation mode detection unit 10 is used for detecting the current bus operation mode of the 220kV double-bus section wiring transformer substation; the bus operation modes comprise a single-bus split operation mode, a double-bus parallel operation mode, a three-section bus parallel operation mode and a four-section bus parallel operation mode;

the standby power supply automatic switching unit 20 is configured to further cut off the main supply line connected to the no-voltage bus and the main supply line, the backup switching line and/or the backup switching element connected to another normal bus in the current bus operation mode, and after a preset cut-off time is reached, execute a corresponding preset priority to select the obtained backup switching lines and/or the backup switching elements to be sequentially and automatically switched on until the no-voltage bus recovers the voltage.

Wherein, the backup power source automatic switching unit 20 includes:

the single-bus voltage loss obtaining module 2011 is configured to obtain a voltage loss bus and a main supply line connected to the voltage loss bus in a single-bus split operation mode, and determine whether the voltage loss bus has a standby switching line and/or a standby switching element;

the first backup switching recovery single bus voltage loss module 2012 is used for cutting off the main supply line connected with the voltage loss bus before the preset cutting off-time is reached if the voltage loss bus is judged to have only one backup switching line, and directly selecting the backup switching line to automatically switch on to recover the voltage of the voltage loss bus after the preset cutting off-time is reached;

the second standby switching recovery single-bus voltage loss module 2013 is used for cutting off a main supply line connected with the voltage loss bus before the preset cutting off-time is reached if the voltage loss bus is judged to have a plurality of standby switching lines, and executing the preset first line standby switching priority to select the corresponding standby switching lines to be automatically switched in sequence after the preset cutting off-time is reached until the voltage of the voltage loss bus is recovered;

the third backup switching recovery single-bus voltage loss module 2014 is used for cutting off a main supply circuit connected with the voltage loss bus before the preset cutting off-time is reached and directly selecting a backup switching element to automatically switch on so as to recover the voltage of the voltage loss bus after the preset cutting off-time is reached if the voltage loss bus is judged to have only one backup switching element;

a fourth backup switching recovery single-bus voltage loss module 2015, configured to, if it is determined that a plurality of backup switching elements exist in the voltage loss bus, cut off a main supply line connected to the voltage loss bus before the preset cut-off time is reached, and after the preset cut-off time is reached, execute a preset first element backup switching priority to select corresponding backup switching elements to be automatically switched in sequence until the voltage of the voltage loss bus is recovered;

the fifth backup switching recovery single bus voltage loss module 2016 is configured to, if it is determined that at least one backup switching element and at least one backup switching line are simultaneously present in the voltage loss bus, cut off the main supply line connected to the voltage loss bus before the preset cut-off time arrives, and after the preset cut-off time arrives, first execute the preset first element backup switching priority to select the corresponding backup switching elements to be sequentially and automatically switched on, and then execute the preset first line backup switching priority to select the corresponding backup switching lines to be sequentially and automatically switched on until the voltage loss bus recovers.

Wherein, the standby power source automatic switching unit 20 further includes:

the double-bus voltage loss acquisition module 2021 is configured to acquire two voltage loss buses in a double-bus parallel operation mode and main supply lines connected to the two voltage loss buses, and determine whether the two voltage loss buses have backup switching lines and/or backup switching elements;

the first backup switching recovery double-bus voltage loss module 2022 is configured to, if it is determined that only one backup switching line exists in the two voltage loss buses, cut off both main supply lines connected to the two voltage loss buses before the preset cut-off time arrives, and directly select the backup switching line to automatically switch on the two voltage loss buses after the preset cut-off time arrives so as to recover the voltages of the two voltage loss buses;

the second backup switching recovery double-bus voltage loss module 2023 is configured to, if it is determined that there are multiple backup switching lines in the two voltage loss buses, cut off all main supply lines connected to the two voltage loss buses before the preset cut-off time arrives, and after the preset cut-off time arrives, execute a preset second line backup switching priority to select corresponding backup switching lines to be automatically switched in sequence until the two voltage loss buses recover voltages;

the third spare power switching recovery double-bus voltage loss module 2024 is configured to, if it is determined that only one spare power switching element exists in the two voltage loss buses, cut off both main power supply lines connected to the two voltage loss buses before the preset cut-off time arrives, and directly select the spare power switching element to automatically switch on to recover the voltages of the two voltage loss buses after the preset cut-off time arrives;

the fourth backup switching recovery double-bus voltage loss module 2025 is configured to, if it is determined that a plurality of backup switching elements exist in the two voltage loss buses, cut off both main supply lines connected to the two voltage loss buses before the preset cut-off time arrives, and execute a preset second element backup switching priority to select corresponding backup switching elements to be automatically switched in sequence after the preset cut-off time arrives until the two voltage loss buses recover the voltage;

the fifth backup switching recovery double-bus voltage loss module 2026 is configured to, if it is determined that at least one backup switching element and at least one backup switching line exist in both the two voltage loss buses, cut off both main supply lines connected to the two voltage loss buses before the preset cut-off time arrives, and after the preset cut-off time arrives, execute the preset second element backup switching priority first to select the corresponding backup switching elements to be automatically switched in sequence, and then execute the preset second line backup switching priority to select the corresponding backup switching lines to be automatically switched in sequence until the two voltage loss buses recover the voltage.

Wherein, the standby power source automatic switching unit 20 further includes:

the three-bus voltage loss acquisition module 2031 is configured to acquire three voltage loss buses and main supply lines connected to the three voltage loss buses in a parallel operation mode of three buses, and determine whether the three voltage loss buses have backup switching lines and/or backup switching elements;

the first backup switching recovery three-bus voltage loss module 2032 is configured to, if it is determined that only one backup switching line exists among the three voltage loss buses, cut all main supply lines connected to the three voltage loss buses before the preset cut-off time arrives, and directly select the backup switching line to automatically switch in to recover voltages of the three voltage loss buses after the preset cut-off time arrives;

the second backup switching recovery three-bus voltage loss module 2033 is configured to, if it is determined that there are multiple backup switching lines in the three voltage loss buses, cut all main supply lines connected to the three voltage loss buses before the preset cut-off time arrives, and execute a preset third line backup switching priority to select corresponding backup switching lines to be automatically switched in sequence after the preset cut-off time arrives until the voltages of the three voltage loss buses are recovered;

a third backup switching recovery three-bus voltage loss module 2034, configured to, if it is determined that only one backup switching element exists in the three voltage loss buses, cut all main supply lines connected to the three voltage loss buses before the preset cut-off time arrives, and directly select a backup switching element to automatically switch in to recover voltages of the three voltage loss buses after the preset cut-off time arrives;

a fourth backup switching recovery three-bus voltage loss module 2035, configured to, if it is determined that there are multiple backup switching elements in the three voltage loss buses, cut all main supply lines connected to the three voltage loss buses before the preset cut-off time arrives, and after the preset cut-off time arrives, execute a preset third-element backup switching priority to select corresponding backup switching elements to be automatically switched in sequence until the three voltage loss buses recover voltages;

a fifth backup switching recovery three-bus voltage loss module 2036, configured to, if it is determined that at least one backup switching element and at least one backup switching line exist in the three voltage loss buses at the same time, cut all main supply lines connected to the three voltage loss buses before the preset cut-off time arrives, and after the preset cut-off time arrives, execute the preset third-element backup switching priority first to select the corresponding backup switching elements to be automatically switched in sequence, and then execute the preset third-line backup switching priority to select the corresponding backup switching lines to be automatically switched in sequence until the three voltage loss buses recover the voltage.

Wherein, the standby power source automatic switching unit 20 further includes:

the four-busbar voltage loss acquisition module 2041 is configured to acquire four voltage loss busbars and main supply lines connected to the four voltage loss busbars in a parallel operation mode of the four busbars, and determine whether there is a standby switching line in the four voltage loss busbars;

the first backup switching recovery four-bus voltage loss module 2042 is configured to, if it is determined that only one backup switching line exists in the four voltage loss buses, cut all main supply lines connected to the four voltage loss buses before the preset cutting-off deadline arrives, and directly select the backup switching line to automatically switch in the four voltage loss buses after the preset cutting-off deadline arrives so as to recover the voltages of the four voltage loss buses;

and the second backup switching recovery four-bus voltage loss module 2043 is configured to, if it is determined that multiple backup switching lines exist in the four voltage loss buses, cut all main supply lines connected to the four voltage loss buses before the preset cutting-off deadline arrives, and execute a preset fourth line backup switching priority to select corresponding backup switching lines to be automatically switched in sequence after the preset cutting-off deadline arrives until the voltages of the four voltage loss buses are recovered.

The embodiment of the invention has the following beneficial effects:

It should be noted that, in the above device embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be achieved; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. A self-adaptive standby power supply automatic switching method of 220kV double-bus-section wiring is used for realizing the automatic switching control of a self-adaptive standby power supply automatic switching device of the 220kV double-bus-section wiring on a 220kV double-bus-section wiring transformer substation connected with the self-adaptive standby power supply automatic switching device, and is characterized by comprising the following steps:

2. The self-adaptive standby power supply automatic switching method of 220kV double-bus-section wiring according to claim 1, wherein the self-adaptive standby power supply automatic switching device of 220kV double-bus-section wiring acquires a no-voltage bus in a current bus operation mode and a main supply line, a standby switching line and/or a standby switching element connected with another normal bus, further cuts off the main supply line connected with the no-voltage bus, and executes a corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in turn after a preset cut-off time is reached until the no-voltage bus recovers the voltage, and the specific steps include:

3. The self-adaptive standby power supply automatic switching method of 220kV double-bus section connection according to claim 1, wherein the self-adaptive standby power supply automatic switching apparatus of 220kV double-bus section connection acquires a no-voltage bus under a current bus operation mode and a main supply line, a standby switching line and/or a standby switching element connected to another normal bus, and further cuts off the main supply line connected to the no-voltage bus, and after a preset cut-off time is reached, executes a corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in turn until the no-voltage bus recovers voltage, further comprising the specific steps of:

4. The self-adaptive standby power supply automatic switching method of 220kV double-bus section connection according to claim 1, wherein the self-adaptive standby power supply automatic switching apparatus of 220kV double-bus section connection acquires a no-voltage bus under a current bus operation mode and a main supply line, a standby switching line and/or a standby switching element connected to another normal bus, and further cuts off the main supply line connected to the no-voltage bus, and after a preset cut-off time is reached, executes a corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in turn until the no-voltage bus recovers voltage, further comprising the specific steps of:

5. The self-adaptive standby power supply automatic switching method of 220kV double-bus section connection according to claim 1, wherein the self-adaptive standby power supply automatic switching apparatus of 220kV double-bus section connection acquires a no-voltage bus under a current bus operation mode and a main supply line, a standby switching line and/or a standby switching element connected to another normal bus, and further cuts off the main supply line connected to the no-voltage bus, and after a preset cut-off time is reached, executes a corresponding preset priority to select the acquired standby switching line and/or standby switching element to be automatically switched in turn until the no-voltage bus recovers voltage, further comprising the specific steps of:

6. A self-adaptive standby power supply automatic switching device for 220kV double-bus section wiring is characterized by comprising a bus operation mode detection unit and a standby power supply automatic switching unit; wherein the content of the first and second substances,

7. The adaptive backup power source automatic switching device of 220kV double-bus-section wiring of claim 6, wherein the backup power source automatic switching unit comprises:

8. The adaptive backup power source automatic switching device of 220kV double-bus-section wiring of claim 6, wherein the backup power source automatic switching unit further comprises:

9. The adaptive backup power source automatic switching device of 220kV double-bus-section wiring of claim 6, wherein the backup power source automatic switching unit further comprises:

10. The adaptive backup power source automatic switching device of 220kV double-bus-section wiring of claim 6, wherein the backup power source automatic switching unit further comprises: