CN114498898B - Power supply line power attribute identification and judgment method and automatic switching method - Google Patents

Power supply line power attribute identification and judgment method and automatic switching method Download PDF

Info

Publication number
CN114498898B
CN114498898B CN202210043078.6A CN202210043078A CN114498898B CN 114498898 B CN114498898 B CN 114498898B CN 202210043078 A CN202210043078 A CN 202210043078A CN 114498898 B CN114498898 B CN 114498898B
Authority
CN
China
Prior art keywords
voltage
power supply
line
double
automatic switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210043078.6A
Other languages
Chinese (zh)
Other versions
CN114498898A (en
Inventor
朱晓红
李建斌
常永要
单源
蔡澔伦
杨伟荣
周永其
赵明辉
曾俊涛
邵代峰
庄明万
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qujing Power Supply Bureau Yunnan Power Grid Co Ltd
Original Assignee
Qujing Power Supply Bureau Yunnan Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qujing Power Supply Bureau Yunnan Power Grid Co Ltd filed Critical Qujing Power Supply Bureau Yunnan Power Grid Co Ltd
Priority to CN202210043078.6A priority Critical patent/CN114498898B/en
Publication of CN114498898A publication Critical patent/CN114498898A/en
Application granted granted Critical
Publication of CN114498898B publication Critical patent/CN114498898B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The invention belongs to the technical field of power grid equipment and control thereof, and provides a power supply line power attribute identification and judgment method and an automatic switching method. The identification judging method for the power supply attribute of the power supply line can enable the control logic of the spare power automatic switching to be clear and simplified, reduce the operation amount, automatically judge according to the actual operation condition, automatically perform logic actions, have high autonomy and intellectualization, truly realize self-adaption, greatly reduce manual intervention, reduce error human factors, greatly improve the reliability of power supply and ensure safe, stable and reliable operation of a power grid.

Description

Power supply line power attribute identification and judgment method and automatic switching method
Technical Field
The invention belongs to the technical field of power grid equipment and control thereof, and particularly relates to a power supply line power attribute identification judging method and an automatic switching method.
Background
The stable and reliable operation of the power grid is closely related to the local economic and social development, if the power of a transformer substation is cut off, the power supply of an industrial and mining enterprise can be interrupted, and the direct economic loss is counted in hundred million yuan; high-speed rails and trains are stopped to cause bad social influence; the resident can seriously influence the living order when the power failure and the water cut-off occur.
When the 500kV power supply looped network and the 220kV power supply looped network form an electromagnetic looped network to operate, the risk of safe and stable operation of the power grid is extremely high, and an open-loop operation mode is needed to be adopted for restraining short-circuit current. The open-loop operation mode is adopted, and a standby power supply automatic switching device (for short, standby automatic switching) is installed at an open-loop point to quickly recover power supply, so that the power supply reliability is ensured.
The spare power automatic switching device of the power system is also a computer, performs logic operation according to input (on/off), and sends instructions (tripping and closing) to the circuit breaker. The traditional spare power automatic switching working principle is that all the wiring modes of the transformer substation are arranged and combined into a plurality of operation modes according to a main power supply and a spare power supply, then the corresponding spare power automatic switching action logic is processed, the transformer substation operates in a certain mode, the main power supply is powered off, the corresponding action logic in a certain mode is started, and the spare power supply is closed.
However, the conventional spare power automatic switching has certain adaptability to a primary-spare wiring mode, but the spare power automatic switching logic is complex and has poor adaptability to a transformer substation wiring mode with a plurality of incoming lines. Taking the simplest 220kV double-bus wiring as an example, as shown in fig. 1, eight spare power automatic switching pre-operation modes are combined by four-circuit incoming lines, eight spare power automatic switching post-operation modes are combined, sixteen modes are combined, and the eight spare power automatic switching pre-operation modes are as follows (table one):
Figure GDA0004114632030000011
Figure GDA0004114632030000021
list one
Note that: (1) For the prior approach, 0 represents shutdown or overhaul and 1 represents operation.
(2) For the automatic backup switching mode, 0 represents no backup switching, 1 and 2 represent open backup switching, 1 is firstly switched, and then 2 is switched after the backup switching is unsuccessful;
(3) For the automatic backup switching mode, when the backup switching element is more than 1 hour, if one of the backup switching elements is overhauled, the device still needs to be charged.
(4) A row is inactive when it is fully filled with a "0".
(5) When the line spare power automatic switching logic is not needed, all setting values in the table are fully filled with 0.
(6) The meter is not suitable for the bus-tie automatic switching mode, the bus-tie automatic switching mode does not need setting, and the device can automatically judge.
From the above, if the incoming line is added two times, the setting mode is increased in series, and the method is changed into 32 modes. Because of
The number of the incoming lines is increased, the number of the combination modes is increased, the corresponding logic is also complicated, and the workload of setting calculation, installation and debugging, operation and maintenance and the labor cost are increased by several times; in addition, the system mode changes, at least two operation staff need to be arranged to the scene to perform the pressing plate switching operation according to the mode, and the problems of false setting, false operation, missing detection, false detection and the like can be caused due to the fact that the number of manual operations and the probability of errors are large in the pressing plate switching operation process, so that the spare power automatic switching device is in false operation and refused operation, immeasurable loss is caused, and the safety risk is huge.
Disclosure of Invention
The invention aims to provide a power supply line power attribute identification judging method and a power supply line power supply attribute automatic switching method which can clearly and simply control logic of spare power automatic switching and reduce operand so as to solve the technical problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a power supply line power attribute identification and judgment method comprises the following steps:
(1) Collecting the voltage of a power supply line; the method can be used for identifying and judging the power supply attribute of the power supply line;
(2) Collecting line voltage of a power supply line; the method can be used for automatic switching preparation and judgment of actions;
(3) Collecting the on-off situation of a circuit breaker on a power supply line; the automatic switching device can be used for automatic switching preparation and automatic switching actions by combining the switching situation of the bus-tie switch;
(4) And judging the power supply attribute of the power supply line through (1) medium voltage cutting voltage, (2) line voltage and (3) the switching-on and switching-off condition of the circuit breaker on the power supply line.
Further, in the step (4), if the voltage of the voltage cut of a certain power supply line is high, the line voltage is high, and the position of the circuit breaker is a closing position, the power supply line can be judged to be a main power supply; if the voltage of a certain power supply line is high, the line voltage is high, and the position of the circuit breaker is split, the power supply line can be judged to be a standby power supply.
Further, the voltage cut voltage is the voltage after bus switching of the power supply line; the line voltage is a line extraction voltage of the power supply line.
The invention also provides a standby power supply automatic switching method applying the identification and judgment method of the power supply attribute of the power supply line, which comprises the charging method of the standby power supply automatic switching device:
detecting whether the voltage of the power supply line is equal to the three-phase voltage;
detecting whether the line voltage of the power supply line is high or not;
detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line;
and according to the system operation mode, the charging is completed after the standby automatic switching charging time meets the corresponding charging conditions.
Further, the discharging method comprises the following steps of:
detecting whether the line voltage of the power supply line is high or not;
detecting whether the voltage of the power supply line is high or not;
detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line;
and according to the system operation mode, the automatic switching device enters a discharge state after the automatic switching discharge delay time of the spare power meets the corresponding discharge conditions.
Further, the method comprises the action process of the automatic switching device:
after the charging is completed;
detecting whether the line voltage of the power supply line is high or not;
detecting whether the voltage of the power supply line is high or not;
detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line;
and according to the system operation mode, the automatic switching action of the spare power is completed after the delay time meets the action process conditions.
In one embodiment, when the method is applied to the bus-tie spare power switching (dark spare), the spare power switching is started, then the circuit breaker corresponding to the voltage change from the voltage on the power supply line to the voltage off is jumped first, and then the bus-tie circuit breaker is combined to complete the spare power automatic switching action.
Further, if there are more than two power supplies, the priority of the power supply is determined, and the control is performed based on the priority of the power supply.
When the voltage loss of the bus of the transformer substation is detected, the main power supply circuit breaker is jumped, the standby power supply circuit breaker is combined according to the high and low priority (when a plurality of standby power supplies exist), and the highest priority is combined first, so that the power supply is restored successfully; if not, the next highest priority is sequentially combined until the power supply is successfully recovered.
The invention also provides an automatic switching device for realizing the automatic switching method of the standby power supply, which comprises a voltage quantity acquisition module, a switching module and a switching module, wherein the voltage quantity acquisition module is used for acquiring the voltage switching voltage and the line voltage of each power supply line and converting the voltage switching voltage and the line voltage into electric quantity state signals;
the switching value acquisition module is used for acquiring switching positions and other locking signals of the circuit breaker and the bus-bar switch on the power supply line;
the switching output module is used for receiving the electric control command sent by the logic board module, completing the electric control of the circuit breaker and the bus-bar circuit breaker on the power supply line and realizing the power supply switching;
and the logic board module is used for receiving the electric quantity state signal converted by the voltage quantity acquisition module, the switching position and other locking signals of the circuit breaker of the switching value acquisition module and forming an electric control command, and outputting the control command to the opening and closing quantity output module.
Specifically, the voltage quantity acquisition module detects the voltage at the position between the circuit breaker and the isolating switch on the power supply line.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention can clearly and simply control logic of the spare power automatic switching, reduce the operation amount, automatically judge and automatically perform logic action according to the actual operation condition, has high autonomy and intellectualization, truly realizes self-adaption, greatly reduces manual intervention, also reduces error human factors, greatly improves the reliability of power supply, ensures safe, stable and reliable operation of a power grid, and effectively solves the problems existing in the prior art.
(2) By adopting the invention, in the application scene of the bus-bar standby (dark standby), when the standby is started, only the change of the voltage on the power supply line is detected, the circuit breaker corresponding to the voltage on the power supply line is jumped, and the position signal of the isolating switch is not required to be introduced by laying a long cable for judging the interval of the main power supply hung by the voltage-losing bus, thereby saving the cost.
Drawings
FIG. 1 is a 220kV double-bus four-circuit wire-incoming wiring diagram;
FIG. 2 is a schematic diagram of the present invention;
FIG. 3 is a schematic diagram of a first mode of operation of the system of the present invention;
FIG. 4 is a schematic diagram of a second mode of operation of the system of the present invention;
FIG. 5 is a schematic diagram of a third mode of operation of the system of the present invention;
FIG. 6 is a schematic diagram of a fourth mode of operation of the system of the present invention;
FIG. 7 is a schematic diagram of a fifth mode of operation of the system of the present invention;
FIG. 8 is a schematic diagram of an automatic switching device according to an embodiment of the present invention;
FIG. 9 is a double bus multi-pass wire-in wiring diagram;
fig. 10 is a schematic diagram of determining a power attribute of a power supply line using a pinch voltage and a line voltage in the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Example 1
The embodiment provides a method for identifying and judging the power supply attribute of a power supply line, which is used for directly judging the power supply attribute of the power supply line by detecting the voltage of the voltage cut and the line voltage of the power supply line and matching with the detection of the switching position and the switching position of a breaker on the power supply line, so that the control logic and the operand of a spare power automatic switching device are simplified, the control logic of the spare power automatic switching device can be clear and simplified, the operand is reduced, the automatic identification is carried out, the logic action is carried out automatically, and the method has high autonomy and intellectualization.
As shown in fig. 2, the method for identifying and judging the power supply attribute of the power supply line includes: (1) collecting the voltage of a power supply line; (2) collecting line voltage of a power supply line; (3) Collecting the on-off situation of a circuit breaker on a power supply line; (4) And judging the power supply attribute of the power supply line through (1) medium voltage cutting voltage, (2) line voltage and (3) the switching-on and switching-off condition of the circuit breaker on the power supply line. The voltage cut voltage is the voltage after bus switching of the power supply line; the line voltage is the line extraction voltage of the power supply line.
Compared with the prior art, the method has the advantages that: the existing spare power switching method adopts the position of a breaker to judge the spare power switching mode (system operation mode), so that all the spare power switching modes need to be considered, the logic is complex, the operation amount is large, the spare power switching method introduces the voltage switching voltage (voltage after switching), the line voltage and the breaker switching-on and switching-off condition of the power supply line, and the three are combined, so that the marking of the power supply attribute of the power supply line can be realized, namely, whether the power supply line is the main power supply or the spare power supply is directly judged, and according to the power supply attribute, all the spare power switching modes do not need to be considered, the logic is simple, the operation amount is small, and the autonomous judgment and the complete self-adaption can be realized.
As shown in fig. 9, in the conventional backup power switching method, the position (1 DL/2DL/3DL … … nDL) of the circuit breaker on the power supply line is collected to determine the system operation mode, and meanwhile, various possible operation modes are required to be manually preset to satisfy a certain setting condition, and the system operation mode is executed according to a pre-designated route. As shown in fig. 10, the method of the present application is to collect the voltage after switching, the line voltage and the switching situation of the power supply line breaker, and directly judge the power supply attribute of the power supply line through the voltage after switching, the line voltage and the switching situation of the power supply line breaker, without considering all the spare power switching modes; for example: three collected data of the power supply line: the voltage cutting voltage, the line voltage and the circuit breaker position of the power supply line can judge that the power supply line is a main power supply source and the corresponding circuit breaker is a main power supply source circuit breaker if the voltage cutting voltage of a certain power supply line has voltage and the line voltage has voltage and the circuit breaker position is a combination position; if the voltage of a certain power supply line is high, the line voltage is high, the position of the circuit breaker is divided, the power supply line can be judged to be a standby power supply, the corresponding circuit breaker is a standby power supply circuit breaker, and other non-main non-standby power supply lines do not participate in standby switching logic.
On the basis of the above, in a further preferred scheme, a priority and an overhaul state can be introduced for auxiliary judgment, specifically, a certain power supply line is provided with voltage, the line voltage is provided with voltage, the positions of the circuit breakers are combined, the priority is one of 0, 1 and 2, the power supply line is judged to be a main power supply source, and the corresponding circuit breaker is a main power supply source circuit breaker; the voltage of a certain power supply line is high, the line voltage is high, the positions of the circuit breakers are separated, the priority is one of 0, 1 and 2, the power supply line is judged to be a standby power supply with priority, and the corresponding circuit breaker is a standby power supply circuit breaker.
Example 2
On the basis of the method provided in embodiment 1, the embodiment provides a standby power supply automatic switching method, which includes a charging method, a discharging method and an action process of the standby power supply automatic switching device, and specifically includes the following steps:
the method for charging the spare power automatic switching device comprises the following steps: detecting whether the voltage of the power supply line is equal to the three-phase voltage; detecting whether the line voltage of the power supply line is high or not; detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line; and according to the system operation mode, the charging is completed after the standby automatic switching charging time meets the corresponding charging conditions. The system operation mode refers to an operation mode of a main power supply line and a standby power supply line of the system.
(II) a discharging method of the spare power automatic switching device: detecting whether the line voltage of the power supply line is high or not; detecting whether the voltage of the power supply line is high or not; detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line; and according to the system operation mode, the automatic switching device enters a discharge state after the automatic switching discharge delay time of the spare power meets the corresponding discharge conditions. The system operation mode refers to an operation mode of a main power supply line and a standby power supply line of the system.
And (III) the action process of the spare power automatic switching device is as follows: after the charging is completed; detecting whether the line voltage of the power supply line is high or not; detecting whether the voltage of the power supply line is high or not; detecting the combination and separation conditions of the bus-tie circuit breaker and/or the circuit breaker on the power supply line; and according to the system operation mode, the automatic switching action of the spare power is completed after the delay time meets the action process conditions. The system operation mode refers to an operation mode of a main power supply line and a standby power supply line of the system. If more than two standby power supplies exist, determining the input priority of the standby power supplies, and controlling according to the input priority of the standby power supplies. Specifically, determining priorities of a plurality of standby power supplies and setting parameters for representing whether the standby power supplies are added into the standby power supply; taking a standby power supply with the setting parameters as first parameters as a target standby power supply, wherein the first parameters are used for representing that the standby power supply allows automatic standby switching; closing a breaker of the destination standby power supply with the first priority ranking in the destination standby power supply; if the switching-on of the circuit breaker of the target standby power supply with the first priority rank is unsuccessful, switching on the circuit breaker of the target standby power supply with the second priority rank in the target standby power supply; if the circuit breaker of the destination standby power supply with the second priority ranking is not successfully switched on, the circuit breaker of the destination standby power supply with the third priority ranking in the destination standby power supply is switched on, and so on until the switching on is successful or the switching on is completed to the last destination standby power supply in the priority ranking. If there is only one primary power source and one backup power source, then there is no priority logic.
In order to enable the technical scheme of the application to be more clearly understood and recognized by the skilled person, taking two mutually standby transformer substation systems (transformer substation A and transformer substation B, taking the transformer substation A as a reference) as an example, each station is respectively provided with an identical spare power automatic switching device, the charging method, the discharging method and the action process of the spare power automatic switching device in the spare power automatic switching method judged based on the power supply line power supply attribute are described in detail by adopting the identical spare power automatic switching method, and according to different operation modes of the systems, under the premise of the technical scheme of the invention, the method comprises the following steps:
in the first mode, as shown in fig. 3, the #1 line and the #3 line are the double-circuit line group 1, the #2 line and the #4 line are the double-circuit line group 2, and the double-circuit line group 1 operates, and the double-circuit line group 2 is ready for use.
The charging method of the spare power automatic switching device comprises the following steps: (1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage; (2) When the double-circuit line group 2 line voltage check control automatic switching, the double-circuit line group 2 line voltage meets the pressure condition (# 2 line or #4 line is pressure); or when the remote spare power automatic switching is put into operation and communication is normal, the opposite side #2 line is pressed and the opposite side #2 line is in the closing position, or the opposite side #4 line is pressed and the opposite side #4 line is in the closing position; (3) The double-circuit line 1 switch is in the combined position, and the double-circuit line 2 switch is in the separated position. And (3) when the corresponding charging conditions (1) to (3) are met, completing charging after the standby automatic switching charging time.
The discharging method of the spare power automatic switching device comprises the following steps: (1) When the circuit voltage check control word of the double-circuit line group 2 is input, the circuit voltage of the double-circuit line group 2 does not meet the voltage condition, and when the remote spare power automatic switching is input, the circuit voltage of the opposite side #2 does not meet the voltage condition or the opposite side 2DL is in the split position, and the circuit voltage of the opposite side #4 does not meet the voltage condition or the opposite side 4DL is in the split position, or the communication is abnormal, and the 15S delay discharge is carried out. (2) The automatic switching sends a closing command or any one of 2DL and 4DL switches (non-overhauling) is closed; (3) when the device has no tripping outlet: a hand-skip double loop group 1 switch (KKJ 1 and KKJ3 each become 0); when the single-nut operation pressing plate is withdrawn, a hand-jumping busbar switch (busbar KKJ becomes 0) (the condition can be withdrawn by a user, namely, the control word of 'post-closing position access' is set to be 0); (4) the 'locking spare power automatic switching' is started; when the single-mother operation pressing plate is put in, the protection action of the I mother or the II mother is started; when the single-parent operation pressing plate is withdrawn: when the 'circuits 1 and 3 are positioned on the II female' pressing plate and withdraw, the II female protection action is started; when the circuits 1 and 3 are positioned on the pressing plate II, the protection action I is started; (5) TWJ of either the two-circuit line group 1 switch or the two-circuit line group 2 switch is abnormal; (6) refusing jump of the double-circuit line group 1 switch or the bus-tie switch; (7) setting a control word or a soft pressing plate to withdraw from the automatic switching mode 1; (8) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation. And when the corresponding discharge conditions (1) - (8) are met, the spare power automatic switching device enters a discharge state.
The automatic preparation process comprises the following steps: when the charging is completed, if the double-circuit line group 2 line voltage check control word input is performed, the double-circuit line group 2 line voltage meets the condition that the pressure condition (# 2 line or #4 line is pressed), or the remote spare power automatic switching input is performed, and when the communication is normal, the opposite side #2 line voltage is pressed and the opposite side 2DL is in the closed position, or the opposite side #4 line voltage is pressed and the opposite side 4DL is in the closed position.
(1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are both not pressed (the line voltage is smaller than the non-voltage starting fixed value), the double-circuit line group 1 is not flowed (I1 and I3 are not flowed), the double-circuit line group 1 is started in the split position or in the combined position and the line is not pressed, and the double-circuit line group 1 switches (1 DL and 3 DL) are jumped through the time delay Tt1, and the switches needing to be cut are jumped through the jump I master and II master actions. And confirming that the switch of the double-circuit line group 1 is tripped, and switching voltages of the two double-circuit lines are not pressed (the line voltages are smaller than the fixed value of the non-pressing brake), and switching of the double-circuit line group 2 is delayed through Th 1. (2) Under the condition that the single-bus operation pressing plate is withdrawn and neither the I bus nor the II bus is protected, if the bus-connected switch is in stealing jump and the double-circuit line group 2 is in no-voltage (the line voltage is smaller than the no-voltage starting fixed value), starting, after the time delay Tt1, jumping the bus-connected switch, if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the II bus-connected operation is combined, and if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the I bus-connected operation is combined. And confirming that the busbar switch is tripped and the voltage cut by the double-circuit line group 2 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), and delaying the switch of the double-circuit line group 2 through Th 1. (3) The single-bus operation pressing plate is withdrawn, when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and withdrawn, the' I-bus protection action is performed, or when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and input, the' double-circuit line group 1 does not flow, the double-circuit line group 2 is in voltage cut and voltage is not voltage (the line voltage is smaller than the voltage starting fixed value), then the device is started, through time delay Tt1, the master-bus connection switch is jumped, if the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and withdrawn, the' II-bus 'action is jumped, and if the' circuits 1 and 3 are positioned on the 'II-bus' pressing plate and input, the 'I-bus' action is jumped. And confirming that the busbar switch is tripped and the voltage cut by the double-circuit line group 2 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), and delaying the switch of the double-circuit line group 2 through Th 1.
In the second mode, as shown in fig. 4, the #1 line and the #3 line are the double-circuit line group 1, the #2 line and the #4 line are the double-circuit line group 2, the double-circuit line group 1 is standby, and the double-circuit line group 2 operates).
The charging method of the spare power automatic switching device comprises the following steps: (1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage, and when the circuit voltage check control word of the double-circuit line group 1 is input, the circuit voltage of the double-circuit line group 1 meets the voltage condition (# 1 circuit or #3 circuit is voltage); (2) The switches of the double-circuit line group 1 are all in the split position, and the switches of the double-circuit line group 2 are in the combined position. And when the corresponding charging conditions are met, the charging is completed after the standby automatic switching charging time.
The discharging method of the spare power automatic switching device comprises the following steps: (1) When the check control word of the double-circuit line 1 line voltage is input, the double-circuit line 1 line voltage does not meet the voltage condition, and the discharge is performed after 15S delay. (2) A closing command is sent by automatic switching or any switch (non-overhauling) of the double-circuit line group 1 is closed; (3) when the device has no tripping outlet: a hand-skip double loop group 2 switch (KKJ 2 and KKJ4 each become 0); when the single-bus operation pressing plate is withdrawn, the hand-jumping bus-bar switch (bus-bar KKJ becomes 0). (this condition may be exited by the user, i.e. "post-closing position access" control word is set to 0); (4) the 'locking spare power automatic switching' is started; when the single-mother operation pressing plate is put in, the protection action of the I mother or the II mother is started; when the single-master running platen is withdrawn: when the 'circuits 1 and 3 are positioned on the II mother' pressing plate and withdraw, the I mother protection action is started; when the circuits 1 and 3 are positioned on the II mother pressing plate, the II mother protection action is started; (5) Any TWJ of the two-circuit line group 1 switch or the two-circuit line group 2 switch is abnormal; (6) double loop group 2 switch or bus connection switch refuses to jump; (7) setting a control word or a soft pressing plate to withdraw from the automatic switching mode 2; (8) When the remote automatic switching is put into and communication is normal, a 'contralateral locking remote automatic switching' signal is received. (9) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation. When the conditions (1) to (9) are satisfied, the spare power automatic switching device enters a discharge state.
The action process of the spare power automatic switching is as follows: when the charging is completed, the double-circuit line group 1 line voltage satisfies the voltage condition (# 1 line or #3 line is voltage) when the double-circuit line group 1 line voltage check control word is put in:
(1) And when the remote spare power automatic switching device receives a double-jump bus switch command sent from the opposite side during the remote spare power automatic switching, the double-jump bus I and the double-jump bus II act. (2) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are both non-voltage (the line voltages are smaller than the non-voltage starting fixed value), the double-circuit line group 2 is non-current, and is started in a split position or in a combined position and the line is non-voltage, through time delay Tt2, the double-circuit line group 2 switches (2 DL and 4 DL) are jumped (when the remote spare power automatic switching is carried out, if a remote automatic switching signal is received within Tt2 time, the opposite side starting remote automatic switching is not jumped), and meanwhile, the I master and the II master are jumped. And confirming that the double-circuit line group 2 switch is tripped (if a remote self-switching signal is started on the opposite side, whether the double-circuit line group 1 switch is tripped is not judged), and switching voltages of the two double-circuit lines are not pressed (the line voltages are smaller than the fixed value of the non-pressing gate), and switching the double-circuit line group 1 switch through Th2 delay. (3) Under the condition that the single-bus operation pressing plate is withdrawn and neither the I bus nor the II bus is protected, if the bus-connected switch is in stealing jump and the voltage for the double-circuit line group 1 is not pressed (the line voltage is smaller than the non-voltage starting fixed value), the double-circuit line group is started, after the time delay Tt2, the bus-connected switch is jumped, if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the I bus-connected operation is jumped, and if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the II bus-connected operation is jumped. And confirming that the busbar switch is tripped and the voltage of the double-circuit line group 1 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), and switching the double-circuit line group 1 through Th2 delay. (4) The single-bus operation pressing plate is withdrawn, when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and withdrawn, the' II-bus 'pressing plate is withdrawn, or when the' circuits 1 and 3 are positioned on the 'II-bus' pressing plate and input, the 'I-bus' pressing plate is withdrawn, the 'double-circuit line group 2' is free of current, the double-circuit line group 1 is free of voltage (the line voltage is smaller than the non-voltage starting fixed value), the automatic switching device is started, and the 'I-bus' pressing plate is jumped through the time delay Tt2, the 'I-bus' pressing plate is jumped when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and the' II-bus 'pressing plate is thrown, and the' circuits 1 and 3 are jumped when the 'II-bus' pressing plate is input. And confirming that the busbar switch is tripped and the voltage of the double-circuit line group 1 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), and switching the double-circuit line group 1 through Th2 delay.
In a third mode, as shown in fig. 5, the #1 line and the #3 line are double-circuit line group 1, the #2 line and the #4 line are double-circuit line group 2, the two double-circuit lines operate, and the bus is reserved (dark reserved).
The charging method of the spare power automatic switching device comprises the following steps: (1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage; (2) The double-circuit line group 1 switch is in the combined position, the double-circuit line group 2 switch is in the combined position, and the bus-tie switch is in the separated position. And (3) completing charging after the spare power automatic switching charging time meeting the conditions (1) - (2).
The discharging method and the action process of the spare power automatic switching are divided into two situations:
in the first case, if the double-circuit line group 1 loses power, the discharging method of the spare power automatic switching is as follows: (1) The voltage of the double-circuit line group 2 does not meet the voltage condition, and the discharge is carried out after 15S delay. (2) the automatic switching sends a closing command or the bus-bar switch is closed; (3) when the device has no tripping outlet: hand-skip double loop group 1 switch (both KKJ1 and KKJ3 become 0). (this condition may be exited by the user, i.e. "post-closing position access" control word is set to 0); (4) the 'locking spare power automatic switching' is started; single mother operation pressing plate input; the protection action of the I parent or the II parent is started; (5) TWJ anomalies for the two-circuit line group 1 switch; (6) double loop group 1 switch refuses to jump; (7) setting a control word or a soft pressing plate to withdraw from the automatic switching mode 3; (8) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation, so that the spare power automatic switching device meets the conditions (1) to (8) and enters a discharging state.
The action process of the spare power automatic switching is as follows: when the charging is completed, the voltage of the double-circuit line group 2 is pressed, the voltage of the double-circuit line group 1 is not pressed (the line voltage is smaller than the non-voltage starting fixed value), the double-circuit line group 1 is not flowed (I1 and I3 are not flowed), the double-circuit line group 1 is started in split or combined position and the line is not pressed, through time delay Tt3, the double-circuit line group 1 switch (1 DL and 3 DL) is jumped, if the line 1 and 3 are positioned at the II master pressing plate and withdrawn, the I master action is jumped, and if the line 1 and 3 are positioned at the II master pressing plate, the II master action is jumped. And confirming that the switch of the double-circuit line group 1 is tripped, and ensuring that the voltage of the double-circuit line group 1 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), and carrying out Th3 time delay on the double-circuit line group 1.
In the second case, if the double-circuit line group 2 loses power, the discharging method of the spare power automatic switching is as follows: (1) The voltage of the double-circuit line group 1 does not meet the voltage condition, and the discharge is carried out after 15S delay. (2) the automatic switching sends a closing command or the bus-bar switch is closed; (3) when the device has no tripping outlet: hand-skip double loop group 2 switch (both KKJ2 and KKJ4 become 0). (this condition may be exited by the user, i.e. "post-closing position access" control word is set to 0); (4) the 'locking spare power automatic switching' is started; single mother operation pressing plate input; the protection action of the I parent or the II parent is started; (5) double loop group 2 switch TWJ abnormal; (6) double loop group 2 switch refusal jump; (7) setting a control word or a soft pressing plate to withdraw from the automatic switching mode 4; (8) When the remote automatic switching is put into and the channel is normal, a 'contralateral locking remote automatic switching' signal is received. (9) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation, so that the spare power automatic switching device meets the conditions (1) to (9) and enters a discharging state.
The action process of the spare power automatic switching is as follows: when the charging is completed, the voltage of the double-circuit line group 1 is pressed: (1) The voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than the non-voltage starting fixed value), the double-jump bus switch command sent from the opposite side is received when the remote spare power automatic switching is started, if the lines 1 and 3 are positioned on the pressing plate II, the double-jump bus is started, and if the lines 1 and 3 are positioned on the pressing plate II, the double-jump bus is started. (2) The voltage of the double-circuit line group 2 is no-voltage (the line voltage is smaller than the starting fixed value without voltage), the double-circuit line group 2 is no-current, and the double-circuit line group 2 is started when the double-circuit line group 2 is split or combined and the line is no-voltage, after time delay Tt2, the double-circuit line group 2 switch is jumped (when the opposite-side starting remote automatic switching signal is received within the time of Tt4 during remote spare automatic switching), and the double-circuit line group 2 switch is jumped at the same time: if the 'circuits 1 and 3 are positioned on the pressing plate II, the mother II action is combined and jumped, and if the' circuits 1 and 3 are positioned on the pressing plate II, the mother I action is combined and jumped. And confirming that the switch of the double-circuit line group 2 is tripped (if a remote self-switching signal is started on the opposite side, whether the switch is tripped or not is not judged), and ensuring that the voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than the fixed value of the non-pressing gate), and carrying out Th4 time delay on the double-circuit line group 2.
In a fourth mode, as shown in fig. 6, the #1 line and the #3 line are the double-circuit line group 1, the #2 line and the #4 line are the double-circuit line group 2, the double-circuit line group 1 operates, the double-circuit line group 2 is standby, and the opposite station is powered off.
The charging method of the spare power automatic switching device comprises the following steps: (1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage; the voltage of the circuit of the double-circuit line group 2 meets the voltage condition, or when the remote spare power automatic switching is put into operation and the communication is normal, the voltage of the opposite-side circuit is pressed and the opposite-side circuit is in the closing position; (2) The double-circuit line 1 switch is in the combined position, and the double-circuit line 2 switch is in the separated position. And (3) after the spare power automatic switching charging time is reached, the charging is completed under the conditions (1) to (2).
The discharging method of the spare power automatic switching device comprises the following steps: (1) The voltage of the double-circuit line group 2 does not meet the voltage condition, and the discharge is carried out after 15S delay. (2) The automatic switching sends a closing command or the double-circuit line group 2 switch is closed; (3) The automatic switching device is provided with a locking automatic switching device or a remote automatic switching device; (4) TWJ anomalies for the two-circuit line group 2 switch; (5) When the communication is normal, the two-circuit line group 2 is divided into two opposite side line switches or receives a signal of 'opposite side locking remote automatic switching'; (6) when the communication quality is invalid, discharging by 15S delay; and (7) setting the control word or the soft pressing plate to withdraw from the automatic switching mode 5. (8) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation, so that the spare power automatic switching device meets the conditions (1) to (8) and enters a discharging state.
The action process of the spare power automatic switching is as follows: when the charging is completed, the voltage of the double-circuit line group 2 is pressed, the voltage of the double-circuit line group 2 is not pressed, the communication is normal, the voltage of the opposite-side line is not pressed, meanwhile, the opposite-side starting remote automatic switching signal is received, and then the double-circuit line group 2 is started and is delayed to be closed through Th 5.
In a fifth mode, as shown in fig. 7, the #1 line and the #3 line are the double-circuit line group 1, the #2 line and the #4 line are the double-circuit line group 2, the self station is closed loop, and the opposite station is open loop.
The charging method of the spare power automatic switching device comprises the following steps: (1) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage; (2) The double-circuit line group 1 switch is in the combined position, the double-circuit line group 2 switch is in the combined position, and when the single-bus operation pressing plate is withdrawn, the bus-connection switch is in the combined position; when the single-bus operation pressing plate is put in, the position of the bus-bus switch is not judged. And (3) after the spare power automatic switching charging time is reached, the charging is completed under the conditions (1) to (2).
The discharging method of the spare power automatic switching device comprises the following steps: (1) the switches of the double-circuit line group 2 are all in split positions; (2) when the device has no tripping outlet: a hand-skip double loop group 1 switch (KKJ 1 and KKJ3 each become 0); when the single-bus operation pressing plate is withdrawn, the hand-jumping bus-bar switch (bus-bar KKJ becomes 0). (this condition may be exited by the user, i.e. "post-closing position access" control word is set to 0); (3) The automatic switching device is provided with a locking automatic switching device or a remote automatic switching device; when the single-mother operation pressing plate is put in, the protection action of the I mother or the II mother is started; when the single-master running platen is withdrawn: when the 'circuits 1 and 3 are positioned on the II female' pressing plate and withdraw, the II female protection action is started; when the circuits 1 and 3 are positioned on the pressing plate II, the protection action I of the mother is started; (4) TWJ anomalies for the two-circuit line group 1 switch; (5) refusing jump of the double-circuit line group 1 switch or the bus-tie switch; (6) setting a control word or a soft pressing plate to withdraw from the automatic switching mode 6; (7) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation. The spare power automatic switching device enters a discharge state when the conditions (1) to (7) are satisfied.
The action process of the spare power automatic switching is as follows: after the charging is completed, (1) the voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are both not pressed (the line voltages are smaller than the non-voltage starting fixed value), the double-circuit line group 1 is not flowed (I1 and I3 are not flowed), the double-circuit line group 1 is started in split or combined position and the line is not pressed, and after time delay Tt6, the double-circuit line group 1 switches (1 DL and 3 DL) are jumped, and meanwhile, the I parent and the II parent are jumped in a combined mode and a jumped command is sent to the opposite side station. After confirming that the switch of the double-circuit line group 1 is tripped and the voltage of the double-circuit line is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), a remote self-switching signal is started to the opposite side. (2) Under the condition that the single-bus operation pressing plate is withdrawn and neither the I bus nor the II bus is protected, if the bus-bar switch is in stealing jumping and the double-circuit line group 2 is in no-voltage (the line voltage is smaller than the no-voltage starting fixed value), starting, after time delay Tt6, jumping the bus-bar switch, if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the II bus-bar operation is in a combined jumping mode, if the 'lines 1 and 3 are positioned at the II bus' pressing plate, the I bus-bar operation is in a combined jumping mode, and meanwhile, a combined jumping command is sent to the opposite side station. After confirming that the busbar switch is tripped and the voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), a remote automatic switching signal is started to the opposite side. (3) The single-bus operation pressing plate is withdrawn, when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and withdrawn, the' I-bus protection action is performed, or when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and input, the' double-circuit line group 1 does not flow, the double-circuit line group 2 is in voltage cut and voltage is not voltage (line voltage is smaller than the voltage starting fixed value), then the device is started, through time delay Tt6, the 'jump-bus' connection switch is used for jointly jumping the 'II-bus' action when the 'circuits 1 and 3 are positioned on the' II-bus 'pressing plate and withdrawing, and the' circuits 1 and 3 are positioned on the 'II-bus' pressing plate and input, the 'I-bus' action is jointly jumped, and simultaneously, a connection jump command is sent to the opposite side station. After confirming that the busbar switch is tripped and the voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than the fixed value of the non-pressing brake), a remote automatic switching signal is started to the opposite side.
In a further preferred scheme, the embodiment further comprises collecting single-phase current of the power supply line, and is used for preventing standby automatic switching malfunction and confirming disconnection of the incoming line switch after PT three-phase disconnection, and PT disconnection detection should be carried out when the incoming line switch is not started. Specifically, the abnormal operation signal (BJJ relay action) is sent when the following conditions are detected: (1) The switches are provided with streams (I1, I2, I3 and I4), the corresponding switches (1 DL, 2DL, 3DL and 4 DL) are jumped, the corresponding incoming line overhaul pressing plate is not put in, TWJ abnormality of the corresponding incoming line is reported through 10 seconds delay, and the corresponding spare power automatic switching mode is locked. (2) After the device sends out a tripping pulse, the corresponding switch does not trip within 1 second, and the corresponding switch refuses to operate. And the switch refuses to act and alarms until the signal is reset. And (3) the bus PT is disconnected and the line PT is disconnected.
Example 3
As shown in fig. 8, this embodiment provides an automatic switching device for implementing the power supply line power attribute judging method and the standby power supply automatic switching method provided in embodiments 1 and 2, where the automatic switching device includes: the voltage quantity acquisition module is used for acquiring the voltage cutting voltage and the line voltage of each power supply line and converting the voltage cutting voltage and the line voltage into an electric quantity state signal; the switching value acquisition module is used for acquiring switching position closing and separating locking signals of the circuit breaker and the bus-bar switch on the power supply line; the switching output module is used for receiving the electric control command sent by the logic board module, completing the electric control of the circuit breaker on the power supply line and the circuit breaker on the bus, and realizing power supply switching; the logic board module is used for receiving the electric quantity state signal converted by the voltage quantity acquisition module and the circuit breaker closing and opening locking signal of the switching quantity acquisition module, forming an electric control command and outputting the control command to the opening output module; the voltage acquisition module detects the voltage at the position between the circuit breaker and the hot standby switch on the power line. The voltage quantity acquisition module, the switching value acquisition module and the opening output module are communicated with the logic board module, and existing products can be adopted, for example, the voltage quantity acquisition module and the switching value acquisition module can adopt a spare power supply automatic switching device of a PSC-9654 model of a Nanrui manufacturer.
The foregoing is a preferred embodiment of the present invention. It should be noted that those skilled in the art may make several modifications without departing from the design principles and technical solutions of the present invention, and these modifications should also be considered as the protection scope of the present invention.

Claims (1)

1. The identification and judgment method and the automatic switching method of the power supply attribute of the power supply line are characterized by comprising the following steps: (1) collecting the voltage of a power supply line; (2) collecting line voltage of a power supply line; (3) Collecting the on-off situation of a circuit breaker on a power supply line; (4) Judging the power supply attribute of the power supply line through (1) medium voltage cutting voltage, (2) line voltage and (3) circuit breaker switching-on and switching-off conditions of the power supply line; in the step (4), if the voltage of a certain power supply line is high, the line voltage is high, and the position of the circuit breaker is a closing position, the power supply line can be judged to be a main power supply; if the voltage of a certain power supply line is high, the line voltage is high, and the position of the circuit breaker is split, the power supply line can be judged to be a standby power supply; the voltage cut voltage is the voltage after bus switching of the power supply line; the line voltage is the line extraction voltage of the power supply line;
if the #1 line and the #3 line are double-circuit line group 1, the #2 line and the #4 line are double-circuit line group 2, the two double-circuit lines run, and the busbar is reserved, then:
the charging method of the spare power automatic switching device comprises the following steps: (a5) The voltage cut by the double-circuit line group 1 and the voltage cut by the double-circuit line group 2 are all three-phase voltage; (b5) The double-circuit line group 1 switch is in the combined position, the double-circuit line group 2 switch is in the combined position, and the bus-tie switch is in the separated position; the charging is completed after the standby automatic switching charging time meeting the conditions (a 5) to (b 5);
the discharge method of the spare power automatic switching is divided into two cases:
in the first case, if the double-circuit line group 1 loses power, the discharging method of the spare power automatic switching is as follows: (a6) The voltage of the double-circuit line group 2 does not meet the voltage condition, and the discharge is carried out by 15S delay; (b 6) sending a closing command from the automatic switching or closing the bus-bar switch; (c 6) when the device has no trip outlet: a hand-jumping double-circuit line group 1 switch; (d 6) locking standby automatic switching is started; single mother operation pressing plate input; the protection action of the I parent or the II parent is started; (e 6) TWJ anomalies for the two-circuit line group 1 switch; (f 6) double loop group 1 switch bounce; (g 6) setting the control word or the soft pressing plate to withdraw from the automatic switching mode 3; (h6) The #1 wire overhaul and the #3 wire overhaul pressing plates are put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are put into operation, so that the spare power automatic switching device meets the conditions (a 6) to (h 6) and enters a discharging state;
in the second case, if the double-circuit line group 2 loses power, the discharging method of the spare power automatic switching is as follows: (a7) The voltage of the double-circuit line group 1 does not meet the voltage condition, and the discharge is carried out by 15S delay; (b 7) automatically switching on a switching-on command or switching on a bus-bar switch; (c 7) when the device has no trip outlet: a hand-jumping double-circuit line group 2 switch; (d 7) a 'blocking standby power automatic switching' is started; single mother operation pressing plate input; the protection action of the I parent or the II parent is started; (e 7) a double loop group 2 switch TWJ anomaly; (f 7) double loop group 2 switch bounce; (g 7) setting the control word or the soft pressing plate to withdraw from the automatic switching mode 4; (h7) When the remote automatic switching is put into and the channel is normal, a 'contralateral locking remote automatic switching' signal is received; (i7) And the #1 wire overhaul and the #3 wire overhaul pressing plates are respectively put into operation, or the #2 wire overhaul and the #4 wire overhaul pressing plates are respectively put into operation, so that the conditions (a 7) to (i 7) are met, and the spare power automatic switching enters a discharge state.
CN202210043078.6A 2022-01-14 2022-01-14 Power supply line power attribute identification and judgment method and automatic switching method Active CN114498898B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210043078.6A CN114498898B (en) 2022-01-14 2022-01-14 Power supply line power attribute identification and judgment method and automatic switching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210043078.6A CN114498898B (en) 2022-01-14 2022-01-14 Power supply line power attribute identification and judgment method and automatic switching method

Publications (2)

Publication Number Publication Date
CN114498898A CN114498898A (en) 2022-05-13
CN114498898B true CN114498898B (en) 2023-05-05

Family

ID=81512865

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210043078.6A Active CN114498898B (en) 2022-01-14 2022-01-14 Power supply line power attribute identification and judgment method and automatic switching method

Country Status (1)

Country Link
CN (1) CN114498898B (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917056B (en) * 2010-08-16 2012-12-12 广东省电力调度中心 220kV bus switch spare automatic switching method of 550kV station
CN102055235B (en) * 2011-01-12 2013-01-30 广东省电力调度中心 Spare power automatic switching method for 220kV side circuit and bus of 220kV transformer station
CN103595120B (en) * 2013-11-21 2015-11-18 长园深瑞继保自动化有限公司 Many inlet wires standby electric power automatic throwing method
KR20170003334A (en) * 2015-06-30 2017-01-09 (주)엠텍정보기술 Automatic load transfer switch and control method thereof
CN108347092A (en) * 2017-11-18 2018-07-31 深圳供电局有限公司 Method for controlling input of multi-terminal standby power supply of transformer substation
CN110601350B (en) * 2019-09-23 2024-06-25 云南电网有限责任公司曲靖供电局 High-voltage self-adaptive regional automatic switching system and automatic switching control method thereof
CN210297346U (en) * 2019-09-27 2020-04-10 无锡锡自电力自动化***有限公司 Automatic switching device for standby power supply
CN111786383B (en) * 2020-07-01 2021-05-25 云南电网有限责任公司曲靖供电局 Spare power automatic switching device and method for realizing mutual backup of multiple power incoming lines

Also Published As

Publication number Publication date
CN114498898A (en) 2022-05-13

Similar Documents

Publication Publication Date Title
CN101917064B (en) Back-up protection processing method of digital substation transformer based on GOOSE mode
CN102055235A (en) Spare power automatic switching method for 220kV side circuit and bus of 220kV transformer station
CN104518564A (en) Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method
CN104167808A (en) Automatic 220kV spare power switching method
CN102790426A (en) Improved spare power source automatic switch method for single bus sectionalized operation of power substation
CN110932395B (en) Communication system of low-voltage intelligent spare power automatic switching
CN110601350B (en) High-voltage self-adaptive regional automatic switching system and automatic switching control method thereof
CN114977171A (en) Power distribution network load transfer method and device
CN109510192B (en) Power distribution network and self-healing method thereof
CN104485732A (en) In-put control method for standby powers of transformer substations
CN105006881B (en) One kind hauling oneself willingly into runback control system
CN102005819A (en) Fault isolation method of electric distribution network
CN101860075A (en) Three-power supply automatic switching device
CN103532221A (en) Spare-power automatic switching implementation method of lines under wiring and operating modes of self-adaptive 330kV substation
CN114498898B (en) Power supply line power attribute identification and judgment method and automatic switching method
CN107910855A (en) A kind of connection applied to intelligent substation cuts small power supply device and connection blanking method
CN204886396U (en) Haul oneself willingly into runback control system
CN106340954A (en) Method for identifying line breaking of power supply line and switching to standby power supply
CN105356585A (en) Breaker closing and blocking loop
CN111786383B (en) Spare power automatic switching device and method for realizing mutual backup of multiple power incoming lines
CN204794328U (en) Three -phase electricity dual supply automatic switching control equipment
CN103728529B (en) A kind of switch gap condition discrimination method
CN201656555U (en) Three-power-supply automatic switching-over device
CN104917171A (en) Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation
CN112751333B (en) Intelligent low-voltage switch cabinet for rail transit and control method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant