CN112701778B - Three-section type auxiliary power automatic switching method with contact bus - Google Patents
Three-section type auxiliary power automatic switching method with contact bus Download PDFInfo
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- CN112701778B CN112701778B CN202011529934.6A CN202011529934A CN112701778B CN 112701778 B CN112701778 B CN 112701778B CN 202011529934 A CN202011529934 A CN 202011529934A CN 112701778 B CN112701778 B CN 112701778B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a three-section type auxiliary spare power automatic switching method with a tie bus, which relates to the technical field of power systems and comprises a normal operation mode and a special operation mode, wherein the normal operation mode is that an inlet wire switch operates with a load bus, the special operation mode is that the tie switch operates with the load bus, inlet wire switches 1DL and 2DL in an external station of a bus I and a bus II operate with loads, the bus III is used as the tie bus without loads, an external construction power supply and an emergency power supply switch 3DL are respectively designed for the bus I and the bus II of the two sections of load buses, the automatic switching function of a spare power supply with the power loss of the load bus in the normal operation mode that the inlet wire switch operates with the bus and the special operation mode that the tie switch operates with the bus can be realized, and the reliability of power supply is ensured.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a three-section type auxiliary power spare power automatic switching method with a contact bus.
Background
The three-section type station service spare power automatic switching logic with the contact buses has the advantages that due to the existence of the contact buses, the operation modes are flexible and various, the common spare power automatic switching logic cannot meet the requirements of various operation modes, a spare power supply cannot be automatically switched after the bus loses power, and the risk of station service power loss is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a three-section type auxiliary spare power automatic switching method with a communication bus.
The purpose of the invention is realized by the following technical scheme:
a three-section type standby power automatic switching method with a contact bus comprises a normal operation mode and a special operation mode, wherein the normal operation mode is that a service inlet switch operates with a load bus, the special operation mode is that the contact switch operates with the load bus, the service inlet switches 1DL and 2DL operate with loads in a first bus external connection station and a second bus external connection station, and the third bus is used as the contact bus without loads and is connected with a construction power supply and an emergency power supply switch 3DL.
Preferably, the operation of the load bus of the incoming line switch comprises four spare power automatic switching modes, specifically the following contents:
1DL independently runs with I bus, takes III bus as standby power supply of I bus, finishes charging in a self-switching mode 1, starts the self-switching mode 1 when I bus is not pressurized, III bus is pressurized and 1DL incoming line is not flowed, jumps 1DL switch through time delay Tt1, confirms that 1DL switch is tripped, and closes 4DL switch through Th1 after I bus is not pressurized;
when the 2DL bus operates independently with the II bus, the III bus is used as a standby power supply of the II bus, the charging in the automatic switching mode 5 is completed, when the II bus is not pressurized, the III bus is pressurized, and the 2DL incoming line does not flow, the automatic switching mode 5 is started, the 2DL switch is tripped through a time delay Tt5, the 2DL switch is determined to be tripped, and after the II bus is not pressurized, the Th5 is switched to the 5DL switch;
1DL carries I bus and III bus to operate in a linked mode, II bus is used as a primary spare power automatic switching power supply, 3DL switch incoming line is used as a secondary spare power automatic switching power supply, the charging of the automatic switching mode 2 is completed, when I bus is not pressurized, III bus is not pressurized, and 1DL incoming line is not flowed, the automatic switching mode 2 is started, 1DL switch is skipped through time delay Tt2, the 1DL switch is confirmed to be tripped, after I bus and III bus are not pressurized, if II bus is pressurized, 5DL is switched through time delay Th2, if II bus is not pressurized, 3DL incoming line is pressurized, 3DL is switched through time delay Th 2;
the 2DL carries II bus and III bus to operate in a linked mode, I bus is used as a primary spare power automatic switching power supply, a 3DL switch incoming line is used as a secondary spare power automatic switching power supply, the charging of the automatic switching mode 6 is completed, when the II bus is not pressurized, the III bus is not pressurized, and the 2DL incoming line is not flowed, the automatic switching mode 6 is started, the 2DL switch is tripped through a time delay Tt6, the 2DL switch is confirmed to be tripped, after the II bus and the III bus are not pressurized, if the I bus is pressurized, the 4DL is switched through a time delay Th6, and if the I bus is not pressurized, the 3DL incoming line is switched into the 3DL through the time delay Th 6.
Preferably, the operation of the load bus of the interconnection switch comprises four spare power automatic switching modes, specifically the following contents:
the 3DL is operated with I bus and III bus in a linked mode, the 1DL switch incoming line is used as a primary backup automatic switching power supply, the 2DL switch incoming line is used as a secondary backup automatic switching power supply, the charging of the automatic switching mode 3 is completed, when the I bus is not pressurized, the automatic switching mode 3 is started when the 4DL connection switch is not flowed, firstly, whether the III bus is pressurized is detected, if the III bus is pressurized, the 4DL is switched through a delay Th3, if the III bus is not pressurized, the 3DL switch is tripped through a delay Tt3, after the I bus and the III bus are not pressurized, if the 1DL incoming line is pressurized, the 1DL and the 4DL are switched through the delay Th3, and if the 1DL incoming line is not pressurized, and when the 2DL incoming line is pressurized, the 2DL is switched through the delay Th3, the 4DL and the 5DL;
the 3DL is connected with the II bus and the III bus to operate, the 2DL switch incoming line is used as a primary spare power automatic switching power supply, the 1DL switch incoming line is used as a secondary spare power automatic switching power supply, the automatic switching mode 7 is charged, when the II bus is not pressurized and the 5DL connection switch does not have current, the automatic switching mode 7 is started, whether the III bus is pressurized or not is firstly detected, if the III bus is pressurized, the 5DL is switched through the delay Th7, if the III bus is not pressurized, the 3DL switch is tripped through the delay Tt7, after the II bus and the III bus are not pressurized, if the 2DL incoming line is pressurized, the 2DL and the 5DL are switched through the delay Th7, and if the 2DL incoming line is not pressurized and the 1DL incoming line is pressurized, the 1DL is switched through the delay Th7, the 4DL and the 5DL;
2DL is operated with I mother, II mother and III mother in a linkage way, the inlet wire of a 1DL switch is used as a primary spare power automatic switching power supply, the inlet wire of a 3DL switch is used as a secondary spare power automatic switching power supply, the charging of the automatic switching mode 4 is finished, when the I mother is not pressurized and the 4DL interconnection switch is not in current, the automatic switching mode 4 is started, whether the II mother is pressurized or not is firstly detected, if the II mother is pressurized, the 4DL and the 5DL are delayed, if the II mother is not pressurized, the 2DL switch is jumped off through Tt4, the 2DL switch is confirmed, after the I mother, the II mother and the III mother are not pressurized, if the 1DL inlet wire is pressurized, the 1DL, the 4DL and the 5DL are delayed, and when the 1DL inlet wire is not pressurized and the 3DL inlet wire is pressurized, the 3DL, the 4DL and the 5DL are delayed;
when the 1DL is operated with the I bus, the II bus and the III bus in a linked mode, the 2DL switch inlet wire is used as a primary spare power automatic switching power supply, the 3DL switch inlet wire is used as a secondary spare power automatic switching power supply, the automatic switching mode 8 is charged, when the II bus is not pressurized and the 5DL interconnection switch is not in current, the automatic switching mode 8 is started, whether the I bus is pressurized or not is firstly detected, if the I bus is pressurized, the 4DL and the 5DL are delayed, if the I bus is not pressurized, the 1DL switch is tripped through the Tt8, the 1DL switch is confirmed to be tripped, after the I bus, the II bus and the III bus are not pressurized, if the 2DL inlet wire is pressurized, the 2DL, the 4DL and the 5DL are delayed, and if the 2DL inlet wire is not pressurized and the 3DL inlet wire is pressurized, the 3DL, the 4DL and the 5DL are delayed.
Preferably, the system is further provided with a locking function of the spare power automatic switching, the locking function of the spare power automatic switching comprises functions of locking the spare power automatic switching and locking each spare power automatic switching mode, a PT (potential transformer) disconnection judging function is configured, the corresponding automatic switching function is locked after the PT of the bus is disconnected, and a switch protection action, a hand trip contact and a bus voltage PT secondary idle opening auxiliary contact are added in the functions of locking the spare power automatic switching and locking each spare power automatic switching mode.
Preferably, a contact bus maintenance pressing plate is configured, and the backup power automatic switching function is locked when the contact bus is put into maintenance.
Preferably, the corresponding backup power automatic switching mode is locked when the switch protection action or the manual operation switch is operated.
The invention has the beneficial effects that:
1. the logic design of spare power automatic switching is carried out in a targeted manner aiming at different operation modes of three-section type station service power with the interconnection buses, 8 automatic switching modes are respectively designed for two sections of loaded buses (I bus and II bus), and the automatic switching function of the spare power supply with power loss of the loaded buses under the normal operation mode of the incoming line switch with the buses and the special operation mode of the interconnection switch with the buses can be realized; the backup power automatic switching logic can not only realize the backup power automatic switching function when the incoming line power supply disappears or the incoming line switch is stolen and jumped to cause the power failure of the bus, but also realize the backup power automatic switching function of the connection switch under the bus connection operation mode;
2. the design has the contact bus maintenance pressing plate, locks the spare power automatic switching function when in switching, and adds a switch protection action, a hand trip point and a bus voltage PT secondary idle opening auxiliary point in each spare power automatic switching function, thereby preventing the expansion of accidents caused by the switching-on of the spare power automatic switching action on a fault bus and preventing the misoperation of the corresponding spare power automatic switching function caused by the manual operation of a switch or the PT secondary idle opening trip of the bus voltage.
Drawings
FIG. 1 is a schematic diagram of a three-stage auxiliary power structure with a contact bus according to the present invention;
fig. 2 is a logic diagram of the three-section auxiliary power automatic switching device with the contact bus meeting various operation conditions.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to fig. 1-2, but the scope of the present invention is not limited to the following.
The invention is designed optimally aiming at different running modes of three-section type station service power with the interconnection bus, 8 automatic switching modes are respectively designed for two sections of loaded buses (I bus and II bus), the standby power supply automatic switching function of power loss of the loaded buses under the normal running mode of the incoming line switch with the buses and the special running mode of the interconnection switch with the buses can be realized, and the reliability of power supply is ensured.
The three-section type service power structure with the communication bus is shown in figure 1. I, II, carrying out load operation on female external station internal incoming line switches 1DL and 2 DL; the III bus is used as a contact bus, has no load and is only externally connected with a construction power supply and an emergency power supply switch 3DL.
I bus spare power automatic switching normal operation mode (1 DL with I bus operation)
(1) Automatic casting mode 1
When the I bus runs independently, the III bus is used as a standby power supply of the I bus.
Charging conditions are as follows: 1) I, three phases of a mother have pressure, and III the mother has pressure;
2) 1DL is in-bit and 4DL is in-bit.
And finishing charging after the constant value of spare power automatic switching charging time Tc 1.
Discharge conditions: 1) III, the mother material does not meet the pressure condition and discharges in a fixed time delay way;
2) 4DL is in-position;
3) TWJ abnormality of 1 DL;
4) The method comprises the steps of starting a 'locking spare power automatic switching mode 1' or 'locking spare power automatic switching';
5) Control words or soft press plates are not thrown.
The action process is as follows: after charging is finished, when the I bus is not pressurized, the III bus is pressurized, and 1DL incoming line is not flowed, the automatic switching mode 1 is started, and the 1DL switch is tripped through a time delay Tt 1; after the 1DL switch is confirmed to be tripped and the I bus is not pressed, the Th1 is switched to the 4DL switch.
It should be noted that: the automatic switching mode 1 can realize the spare power automatic switching function of power failure of the I bus in the 2DL or 3DL bus linked operation or segmented operation with the II bus and the III bus.
(2) Automatic casting mode 2
The 1DL bus with I bus and III bus is operated in a connecting mode, the II bus is used as a primary spare power automatic switching power supply of the II bus, and the 3DL switch incoming line is used as a secondary spare power automatic switching power supply of the II bus.
Charging conditions are as follows: 1) I, pressing mother, and III pressing mother;
2) 5DL is in the quantile;
3) II, mother pressing or 3DL incoming line pressing;
4) 1DL and 4DL are in the on-position, and 3DL is in the off-position.
And finishing charging after the fixed value of spare power automatic switching charging time Tc 1.
Discharging conditions: 1) II, discharging in a fixed delay way when the 3DL incoming line voltage does not meet the pressure condition;
2) 3DL is in-position;
3) 4DL is in quantile;
4) 5DL is in-position;
5) TWJ abnormality of 1 DL;
6) The method comprises the following steps of starting a 'locking spare power automatic switching mode 2' or 'locking spare power automatic switching';
7) Control words or soft press plates are not thrown.
The action process comprises the following steps: after charging is finished, when a bus I is not pressurized, a bus III is not pressurized, and 1DL incoming line is not flowed, starting a self-throwing mode 2, and tripping a 1DL switch through a time delay Tt 2; after confirming that the 1DL switch is tripped open and the I mother and the III mother have no pressure, if the II mother has pressure, 5DL is switched on through delay Th 2; if the II bus is not pressurized, and the 3DL incoming line is pressurized, the Th2 is delayed to be combined with the 3DL.
It should be noted that: the automatic switching mode 2 can realize the spare power automatic switching function of I bus power loss when the 1DL bus with I bus and III bus is in the connected operation.
I bus spare power automatic switching special operating mode (4 DL bus operating with I bus)
(3) Automatic casting mode 3
And 3DL (three-dimensional) bus-bar and bus-bar linkage operation is carried out with I bus-bar and III bus-bar in the 3DL (dual-layer) switch, wherein the inlet wire of the 1DL switch is used as a primary spare power automatic switching power supply of the 3DL switch, and the inlet wire of the 2DL switch is used as a secondary spare power automatic switching power supply of the 3DL switch.
Charging conditions are as follows: 1) I, pressing mother, and III pressing mother;
2) 1DL incoming line has pressure or 2DL incoming line has pressure;
3) 3DL and 4DL are in the on bit, and 1DL is in the off bit.
And finishing charging after the fixed value of spare power automatic switching charging time Tc 1.
Discharge conditions: 1) 1DL incoming line voltage and 2DL incoming line voltage do not meet the pressure condition, and discharging is delayed after fixation;
2) 1DL is in-position;
3) 4DL is in the quantile;
4) A 'locking spare power automatic switching mode 3' or 'locking spare power automatic switching' is provided;
5) Control words or soft press plates are not thrown.
The action process is as follows: after charging, when I bus is not pressurized and 4DL connection switch is not flowing, starting a self-switching mode 3, firstly detecting whether III bus is pressurized, and if III bus is pressurized, closing 4DL by delaying Th 3; if the III bus is not pressurized, jumping the 3DL switch through a time delay Tt3 to confirm that the 3DL switch is tripped, and if the 1DL incoming line is pressurized after the I bus and the III bus are not pressurized, closing the 1DL and the 4DL through a time delay Th 3; if the 1DL inlet wire is not pressed, and the 2DL inlet wire is pressed, the 2DL, the 4DL and the 5DL are combined through the delay Th 3.
It should be noted that: the automatic switching mode 3 can realize the standby power supply automatic switching function of the power loss of the 3DL incoming line or the power loss of the 3DL incoming line caused by the stealing trip of the 3DL incoming line and the 3DL incoming line in the parallel operation of the 3DL bus with the I bus, the III bus and the II bus and in the three-section connection operation of the 3DL bus with the I bus, the II bus and the III bus.
(4) Automatic switching mode 4
When the 2DL bus with I bus, II bus and III bus operates in a linkage mode, the inlet wire of the 1DL switch is used as a primary spare power automatic switching power supply of the 2DL bus, and the inlet wire of the 3DL switch is used as a secondary spare power automatic switching power supply of the 2DL bus.
Charging conditions are as follows: 1) The first mother has pressure, the second mother has pressure and the third mother has pressure;
2) 1DL incoming line has pressure or 3DL incoming line has pressure;
3) 4DL and 5DL are in the on-bit, and 1DL and 3DL are in the off-bit.
And finishing charging after the constant value of spare power automatic switching charging time Tc 1.
Discharge conditions: 1) 1DL incoming line voltage and 3DL incoming line voltage do not meet the pressure condition, and discharging is delayed after fixation;
2) 1DL is in-position;
3) 3DL is in-position;
4) The method comprises a locking spare power automatic switching mode 4 or a locking spare power automatic switching mode;
5) Control words or soft press plates are not thrown.
The action process comprises the following steps: after charging, when I mother has no voltage and 4DL connection switch has no current, starting up a self-switching mode 4, firstly detecting whether II mother has voltage, if so, switching 4DL and 5DL through time delay Th 4; if the II bus is not pressurized, the 2DL switch is tripped through a time delay Tt4, the 2DL switch is determined to be tripped, and after the I bus, the II bus and the III bus are not pressurized, if the 1DL incoming line is pressurized, the 1DL, the 4DL and the 5DL are switched through a time delay Th 4; if the 1DL inlet wire is not pressed, and the 3DL inlet wire is pressed, the 3DL, the 4DL and the 5DL are combined through the delay Th 4.
It should be noted that: and the automatic switching mode 4 can realize the automatic switching function of the standby power supply of the I bus caused by the 2DL incoming line power failure or 2DL, 4DL and 5DL power stealing and tripping when the 2DL bus with the I bus, the II bus and the III bus are in three-section contact operation.
Automatic bus-tie-in normal operation mode II (2 DL with bus-tie-in operation II)
(1) Automatic casting mode 5
And when the 2DL belt II bus operates independently, the III bus is used as a standby power supply of the II bus.
Charging conditions are as follows: 1) The three phases of the second mother have pressure, and the third mother has pressure;
2) 2DL is in the on bit and 5DL is in the off bit.
And finishing charging after the constant value of spare power automatic switching charging time Tc 1.
Discharge conditions: 1) III, the mother material does not meet the pressure condition and discharges in a fixed time delay way;
2) 5DL is in-position;
3) TWJ anomaly of 2 DL;
4) A 'locking spare power automatic switching mode 5' or 'locking spare power automatic switching' is provided;
5) Control words or soft press plates are not thrown.
The action process is as follows: after charging is finished, when the II bus is not pressurized, the III bus is pressurized, and the 2DL incoming line is not flowed, the automatic switching mode 5 is started, and the 2DL switch is tripped through a time delay Tt 5; and (4) confirming that the 2DL switch is tripped off and the second bus is not pressed, and switching on the 5DL switch through Th 5.
It should be noted that: the automatic switching mode 5 can realize the spare power automatic switching function of power failure of the 1DL or 3DL bus with I bus and III bus in the linked operation or sectional operation.
(2) Automatic casting mode 6
The 2DL bus is connected with the second bus and the third bus to operate, the first bus is used as a primary spare power automatic switching power supply of the first bus, and the incoming line of the 3DL switch is used as a secondary spare power automatic switching power supply of the second bus.
Charging conditions are as follows: 1) II, pressing mother, and III pressing mother;
2) 4DL is in the quantile;
3) I, mother pressure or 3DL incoming line pressure;
4) 2DL and 5DL are in the on bit, and 3DL is in the off bit.
And finishing charging after the constant value of spare power automatic switching charging time Tc 1.
Discharging conditions: 1) I, leading in the voltage of the mother bus and 3DL to not meet the pressure condition, and discharging in a fixed time delay manner;
2) 3DL is in-position;
3) 5DL is in the quantile;
4) 4DL is in-position;
5) TWJ anomaly of 2 DL;
6) A 'locking spare power automatic switching mode 6' or 'locking spare power automatic switching' is provided;
7) Control words or soft press plates are not thrown.
The action process is as follows: after charging is finished, when a bus II is not pressurized, a bus III is not pressurized, and 2DL incoming lines do not flow, starting a self-throwing mode 6, and jumping a 2DL switch through a time delay Tt 6; after the 2DL switch is determined to be tripped open and the II and III mothers are not pressed, if the I mother is pressed, the 4DL is turned on through a delay Th 6; if the I bus has no pressure, and the 3DL incoming line has pressure, the 3DL is switched on through the delay Th 6.
It should be noted that: and the automatic switching mode 6 can realize the spare power automatic switching function of II bus power failure when 2DL with II bus and III bus are in linkage operation.
Special operation mode of automatic bus transfer II (5 DL with II bus operation)
(3) Automatic casting mode 7
When the 3DL bus with the second bus and the third bus runs in a connected mode and is parallel to the first bus, the 2DL switch incoming line is used as a primary spare power automatic switching power supply of the 3DL bus, and the first bus is used as a secondary spare power automatic switching power supply of the 3DL bus.
Charging conditions are as follows: 1) II, pressing mother, and III pressing mother;
2) I, mother pressure or 2DL incoming line pressure;
3) 3DL and 5DL are in the on-position, and 2DL and 4DL are in the off-position.
And finishing charging after the constant value of spare power automatic switching charging time Tc 1.
Discharge conditions: 1) I, mother voltage and 2DL incoming line voltage do not meet the voltage condition, and discharge is delayed after fixation;
2) 2DL is in-position;
3) 5DL is in the quantile;
4) 4DL is in-position;
5) The method comprises a locking spare power automatic switching mode 7 or a locking spare power automatic switching mode;
6) Control words or soft press plates are not thrown.
The action process is as follows: after charging, when the II bus is not pressurized and the 5DL connection switch is not in current, starting the automatic switching mode 7, firstly detecting whether the III bus is pressurized, and if the III bus is pressurized, closing 5DL by delaying Th 7; if the III bus is not pressurized, jumping the 3DL switch through a time delay Tt7 to confirm that the 3DL switch is tripped, and if the 2DL incoming line is pressurized after the II bus and the III bus are not pressurized, closing the 2DL and the 5DL through a time delay Th 7; if the 2DL incoming line is not pressurized, and the I bus is pressurized, the 4DL and the 5DL are combined through time delay Th 7.
It should be noted that: the automatic switching mode 7 can realize the automatic switching function of the standby power supply of the power loss of the second bus caused by the power loss of the 3DL incoming line when the 3DL bus with the second bus, the third bus and the first bus run in parallel or the power loss of the second bus caused by the power loss of the 3DL bus and the 5DL stealing jump, and simultaneously, in order to prevent the conflict with the automatic switching mode 3 when the 3DL bus with the third bus, the second bus and the third bus runs in a connecting mode, 4DL position locking is added.
(4) Automatic casting mode 8
When the 1DL bus with I bus, II bus and III bus operates in a linkage mode, the 2DL switch incoming line is used as a primary spare power automatic switching power supply, and the 3DL switch incoming line is used as a secondary spare power automatic switching power supply.
Charging conditions are as follows: 1) The first mother has pressure, the second mother has pressure and the third mother has pressure;
2) 2DL incoming line has pressure or 3DL incoming line has pressure;
3) 4DL and 5DL are in the on-bit, and 2DL and 3DL are in the off-bit.
And finishing charging after the fixed value of spare power automatic switching charging time Tc 1.
Discharging conditions: 1) 2DL incoming line voltage and 3DL incoming line voltage do not meet the pressure condition, and discharging is delayed after fixation;
2) 2DL is in-position;
3) 3DL is in-position;
4) A 'locking spare power automatic switching mode 8' or 'locking spare power automatic switching' is provided;
5) Control words or soft press plates are not thrown.
The action process is as follows: after charging, when the II bus is not pressurized and the 5DL interconnection switch is not flowed, starting an automatic switching mode 8, firstly detecting whether the I bus is pressurized, and if the I bus is pressurized, closing 4DL and 5DL through a delay Th 8; if the I bus is not pressurized, jumping the 1DL switch through a time delay Tt8 to confirm that the 1DL switch is tripped, and if the 2DL incoming line is pressurized after the I bus, the II bus and the III bus are not pressurized, switching the 2DL, the 4DL and the 5DL through a time delay Th 8; if the 2DL incoming line is not pressurized, and the 3DL incoming line is pressurized, the 3DL, the 4DL and the 5DL are combined through time delay Th 8.
It should be noted that: the automatic switching mode 8 can realize the standby power supply automatic switching function of the power loss of the 1DL incoming line or the power loss of the II bus caused by the stealing trip of the 1DL incoming line, the 1DL incoming line and the 1DL incoming line in the three-section interconnection operation of the I bus, the II bus and the III bus.
The spare power automatic switching logic is a three-section type auxiliary power automatic switching logic with an interconnection bus, which meets various operation conditions, belongs to the technical field of relay protection, and is characterized in that 8 automatic switching modes are respectively designed for two sections of loaded buses (I bus and II bus) aiming at each operation mode of the three-section type auxiliary power with the interconnection bus, so that the spare power automatic switching function of power failure of the loaded bus under a normal operation mode of the incoming line switch with the bus and a special operation mode of the interconnection switch with the bus can be realized, and the reliability of power supply is ensured. The standby power supply automatic switching function when the power of the bus is lost due to disappearance of the incoming line power supply or stealing and jumping of the incoming line switch and the standby power supply automatic switching function of stealing and jumping of the connecting switch in the bus connection operation mode can be realized. A contact bus maintenance pressing plate is added in the spare power automatic switching logic, the spare power automatic switching function is locked when the spare power automatic switching logic is switched on, and a switch protection action, a hand trip contact and a bus voltage PT secondary idle-switch auxiliary contact are added in each spare power automatic switching function, so that the misoperation of the corresponding spare power automatic switching function is prevented.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the described embodiments are part, rather than all, of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The invention is not intended to be limited to the forms disclosed herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A three-section type auxiliary power spare power automatic switching method with a contact bus is characterized by comprising a normal operation mode and a special operation mode, wherein the normal operation mode is that a service entrance switch operates with a load bus, the special operation mode is that the contact switch operates with the load bus, the service entrance switches 1DL and 2DL in a first bus and a second bus external connection station operate with loads, the third bus is used as the contact bus without loads, and a construction power supply and an emergency power supply switch 3DL are externally connected;
the operation of the load bus of the incoming line switch comprises four spare power automatic switching modes, specifically comprising the following steps:
1DL independently operates with I bus, the III bus is used as a standby power supply of the I bus, the charging in the automatic switching mode 1 is completed, when the I bus is not pressurized, the III bus is pressurized, and the 1DL incoming line is not flowed, the automatic switching mode 1 is started, the 1DL switch is tripped through a time delay Tt1, the 1DL switch is determined to be tripped, and after the I bus is not pressurized, the Th1 is switched to the 4DL switch;
when the 2DL bus operates independently with the II bus, the III bus is used as a standby power supply of the II bus, the charging in the automatic switching mode 5 is completed, when the II bus is not pressurized, the III bus is pressurized, and the 2DL incoming line does not flow, the automatic switching mode 5 is started, the 2DL switch is tripped through a time delay Tt5, the 2DL switch is determined to be tripped, and after the II bus is not pressurized, the Th5 is switched to the 5DL switch;
1DL carries I bus and III bus to operate in a linked mode, II bus is used as a primary spare power automatic switching power supply, 3DL switch incoming line is used as a secondary spare power automatic switching power supply, the charging of the automatic switching mode 2 is completed, when I bus is not pressurized, III bus is not pressurized, and 1DL incoming line is not flowed, the automatic switching mode 2 is started, 1DL switch is skipped through time delay Tt2, the 1DL switch is confirmed to be tripped, after I bus and III bus are not pressurized, if II bus is pressurized, 5DL is switched through time delay Th2, if II bus is not pressurized, 3DL incoming line is pressurized, 3DL is switched through time delay Th 2;
the 2DL is connected with the II bus and the III bus to operate, the I bus is used as a primary spare power automatic switching power supply, the 3DL switch incoming line is used as a secondary spare power automatic switching power supply, the automatic switching mode 6 is charged, when the II bus is not pressurized, the III bus is not pressurized, and the 2DL incoming line is not flowed, the automatic switching mode 6 is started, the 2DL switch is tripped through the time delay Tt6, after the II bus and the III bus are not pressurized, if the I bus is pressurized, the Th6 is switched to 4DL, and if the I bus is pressurized, the 3DL incoming line is pressurized, the Th6 is switched to 3DL.
2. The three-section auxiliary power automatic switching method with the interconnection bus of claim 1, wherein the operation of the interconnection switch with the load bus comprises four automatic switching modes, specifically comprising the following steps:
the 3DL is operated with I bus and III bus in a linked mode, the 1DL switch incoming line is used as a primary backup automatic switching power supply, the 2DL switch incoming line is used as a secondary backup automatic switching power supply, the charging of the automatic switching mode 3 is completed, when the I bus is not pressurized, the automatic switching mode 3 is started when the 4DL connection switch is not flowed, firstly, whether the III bus is pressurized is detected, if the III bus is pressurized, the 4DL is switched through a delay Th3, if the III bus is not pressurized, the 3DL switch is tripped through a delay Tt3, after the I bus and the III bus are not pressurized, if the 1DL incoming line is pressurized, the 1DL and the 4DL are switched through the delay Th3, and if the 1DL incoming line is not pressurized, and when the 2DL incoming line is pressurized, the 2DL is switched through the delay Th3, the 4DL and the 5DL;
the 3DL is connected with the II bus and the III bus to operate, the 2DL switch incoming line is used as a primary spare power automatic switching power supply, the 1DL switch incoming line is used as a secondary spare power automatic switching power supply, the automatic switching mode 7 is charged, when the II bus is not pressurized and the 5DL connection switch does not have current, the automatic switching mode 7 is started, whether the III bus is pressurized or not is firstly detected, if the III bus is pressurized, the 5DL is switched through the delay Th7, if the III bus is not pressurized, the 3DL switch is tripped through the delay Tt7, after the II bus and the III bus are not pressurized, if the 2DL incoming line is pressurized, the 2DL and the 5DL are switched through the delay Th7, and if the 2DL incoming line is not pressurized and the 1DL incoming line is pressurized, the 1DL is switched through the delay Th7, the 4DL and the 5DL;
2DL is operated with I mother, II mother and III mother in a linkage way, the inlet wire of a 1DL switch is used as a primary spare power automatic switching power supply, the inlet wire of a 3DL switch is used as a secondary spare power automatic switching power supply, the charging of the automatic switching mode 4 is finished, when the I mother is not pressurized and the 4DL interconnection switch is not in current, the automatic switching mode 4 is started, whether the II mother is pressurized or not is firstly detected, if the II mother is pressurized, the 4DL and the 5DL are delayed, if the II mother is not pressurized, the 2DL switch is jumped off through Tt4, the 2DL switch is confirmed, after the I mother, the II mother and the III mother are not pressurized, if the 1DL inlet wire is pressurized, the 1DL, the 4DL and the 5DL are delayed, and when the 1DL inlet wire is not pressurized and the 3DL inlet wire is pressurized, the 3DL, the 4DL and the 5DL are delayed;
when the 1DL is operated with the I bus, the II bus and the III bus in a linked mode, the 2DL switch inlet wire is used as a primary spare power automatic switching power supply, the 3DL switch inlet wire is used as a secondary spare power automatic switching power supply, the automatic switching mode 8 is charged, when the II bus is not pressurized and the 5DL interconnection switch is not in current, the automatic switching mode 8 is started, whether the I bus is pressurized or not is firstly detected, if the I bus is pressurized, the 4DL and the 5DL are delayed, if the I bus is not pressurized, the 1DL switch is tripped through the Tt8, the 1DL switch is confirmed to be tripped, after the I bus, the II bus and the III bus are not pressurized, if the 2DL inlet wire is pressurized, the 2DL, the 4DL and the 5DL are delayed, and if the 2DL inlet wire is not pressurized and the 3DL inlet wire is pressurized, the 3DL, the 4DL and the 5DL are delayed.
3. The method for the automatic power switching of the three-section type auxiliary power supply with the interconnection bus as claimed in any one of claims 1 to 2, wherein a locking function of the automatic power switching is further provided, the locking function of the automatic power switching comprises functions of locking the automatic power switching and locking each automatic power switching mode, a PT disconnection judging function is configured, and a switch protection action, a hand trip contact and a bus voltage PT secondary air-break auxiliary contact are added in the functions of locking the automatic power switching and locking each automatic power switching mode after the bus PT is disconnected.
4. The method for the three-stage auxiliary power automatic switching with the contact bus as claimed in claim 3, wherein a contact bus overhaul pressure plate is configured to switch on the contact bus overhaul to lock the automatic switching function.
5. The method for automatically switching the auxiliary equipment power supply with the interconnection bus as claimed in claim 3, wherein the corresponding automatic standby power supply switching mode is locked when a switch protection action or a manual operation switch is performed.
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