CN114614447A - Action logic judgment method of spare power automatic switching device adaptive to double buses - Google Patents
Action logic judgment method of spare power automatic switching device adaptive to double buses Download PDFInfo
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- CN114614447A CN114614447A CN202210270257.3A CN202210270257A CN114614447A CN 114614447 A CN114614447 A CN 114614447A CN 202210270257 A CN202210270257 A CN 202210270257A CN 114614447 A CN114614447 A CN 114614447A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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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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Abstract
The invention relates to the technical field of automatic bus transfer, in particular to a method for judging the action logic of a double-bus adaptive automatic bus transfer device, which comprises the steps that three incoming lines of an automatic bus transfer power supply are randomly operated on a first bus and a second bus; judging whether the two buses are in split operation or not; responding to the fault, and determining the bus with voltage loss according to the trip information; if the first bus is in voltage loss, the spare power automatic switching device connects the first bus and the second bus in a program mode when all spare power automatic switching action conditions are met, and controls the other spare power automatic switching power supply inlet wire running on the first bus to supply power to the first bus. According to the invention, three spare power automatic switching power supply inlet wires of the spare power automatic switching device are randomly operated on the first bus and the second bus, the realized buses are operated in a row, and when the spare power automatic switching power supply inlet wire is tripped due to faults, the spare power automatic switching device can effectively meet the conditions of no voltage of the buses and no current of the inlet wires, so that the spare power automatic switching device acts, and the accuracy and the effectiveness of the spare power automatic switching are ensured.
Description
Technical Field
The invention relates to the technical field of automatic backup power switching, in particular to a method for judging the action logic of a double-bus adaptive automatic backup power switching device.
Background
In order to improve the power supply reliability, the spare power automatic switching device is widely applied to a transformer substation, and along with the continuous development of economy, users have higher and higher requirements on the power supply reliability and do not need to be powered off or the power failure risk probability is reduced to the lowest. Due to the flexibility advantage that the wiring interval on the double buses can be adjusted on any bus, the double buses have higher power supply reliability, and therefore, the double buses are more and more widely applied to substations of 220 kilovolts and below.
However, in the operation of the double-bus connection, there are 4 different operation modes for the double power supply line of the backup power automatic switching, but in the actual operation, in order to exert the backup power automatic switching function, only 2 backup power automatic switching incoming lines can be located on different buses to operate, so that the flexibility of mode adjustment is limited, if the backup power automatic switching is adjusted to operate on the same bus, another bus voltage-loss backup power automatic switching can be disabled in the split operation, for example: 2 power inlet wires (spare power automatic switching power inlet wires) are all located and operate on the same section of bus, the 2 power inlet wires supply power to a first bus, a 3 rd power line (non-spare power automatic switching power inlet wire) is located on a second bus, the bus-tie circuit breaker is in a branch position, and the first bus and the second bus operate in a branch row. If the incoming line where the second bus is located is tripped due to a fault in the scene, the spare power automatic switching device does not meet the conditions of no voltage of the bus and no current of the incoming line at the moment, and the spare power automatic switching device does not act, the second bus is in voltage loss.
Disclosure of Invention
The invention provides a method for judging the action logic of a spare power automatic switching device adaptive to double buses, overcomes the defects of the prior art, and can effectively solve the problem that the existing method for judging the action of the spare power automatic switching device is not suitable for a scene that 2 spare power automatic switching power supply inlet wires are positioned on the same section of bus to operate and easily cause the failure of the spare power automatic switching under the condition of split operation.
The technical scheme of the invention is realized by the following measures: a method for judging the action logic of a spare power automatic switching device adapting to double buses comprises the following steps:
randomly running three incoming lines of the spare power automatic switching power supply on a first bus and a second bus;
judging whether the two buses are in split operation or not, wherein the split operation of the two buses is that two spare power automatic switching power supply inlet wires are positioned on the first bus to operate, and the other spare power automatic switching power supply inlet wire is positioned on the second bus to operate;
responding to the fault, and determining the bus with voltage loss according to the trip information; if the first bus is in voltage loss, when all the spare power automatic switching action conditions are met, the spare power automatic switching device connects the first bus and the second bus in a program mode, and controls the inlet wire of the other spare power automatic switching power supply running on the first bus to supply power to the first bus; and if the second bus is in voltage loss, the spare power automatic switching device controls a spare power automatic switching power supply inlet running on the first bus to supply power to the first bus and the second bus.
The following is further optimization or/and improvement of the technical scheme of the invention:
when the two buses are in split operation, the bus with voltage loss is determined according to trip information, and if the first bus is in voltage loss, the action judgment of the backup power automatic switching device comprises the following steps:
acquiring spare power automatic switching judgment data; the spare power automatic switching judgment data comprises the following data: 1. the spare power automatic switching device under non-switching is directly connected to the bus voltage of the first bus and the second bus; 2. the spare power automatic switching device is connected with the bus voltage of the switched first bus and the second bus through two spare power automatic switching power inlet wires which run on the first bus;
judging whether the spare power automatic switching judgment data meets all spare power automatic switching action conditions or not; the spare power automatic switching action conditions comprise: 1. the spare power automatic switching device is switched in through two spare power automatic switching power inlet wires which run on the first bus and then the first bus and the second bus are subjected to voltage loss at the same time; 2. the two spare power automatic switching power supply inlet wires are positioned on the first bus to operate; 3. the bus voltage of the spare power automatic switching device directly connected to the first bus is 0 under non-switching, and the bus voltage connected to the second bus is not 0;
and responding to the response, connecting the first bus and the second bus in a program of the automatic backup power switching device, and controlling another automatic backup power switching power inlet wire operated on the first bus to supply power to the first bus.
When the two buses are not in split operation, if any incoming line of the backup power automatic switching power supply trips to cause the corresponding bus to lose voltage, the backup power automatic switching device controls the incoming lines of the other backup power automatic switching power supplies to supply power to the first bus and the second bus.
The method also comprises the step of introducing a disconnecting link, wherein each incoming line of the backup power automatic switching power supply is connected with the first bus and the second bus through the disconnecting link, the disconnecting link controls and switches the buses connected with the incoming line of the backup power automatic switching power supply to operate, and the operating mode of the two buses is judged according to the auxiliary position signal of the corresponding switch of each incoming line of the backup power automatic switching power supply.
The circuit breaker is arranged on each incoming line of the spare power automatic switching power supply, and whether the incoming line of the spare power automatic switching power supply supplies power to the bus is judged according to the position signal of the circuit breaker.
According to the invention, three spare power automatic switching power supply inlet wires of the spare power automatic switching device are randomly operated on the first bus and the second bus, and the realized bus is operated in a row-by-row mode, compared with the mode that the two spare power automatic switching power supply inlet wires are positioned on the same first bus and operated, and the bus row-by-row mode that one non-spare power automatic switching power supply inlet wire is positioned on the second bus, when the spare power automatic switching power supply inlet wire is tripped due to faults, the spare power automatic switching can be effectively met and the conditions of no voltage of the buses and no current of the inlet wires are met, so that the spare power automatic switching device acts, the accuracy and the effectiveness of the spare power automatic switching are ensured, and the transformer substation in a double-bus wiring mode flexibly adjusted by adapting to the operation mode of a power grid has higher application value.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a schematic diagram of a split operation structure according to embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of another arrangement operation structure of embodiment 2 of the present invention.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The invention is further described with reference to the following examples and figures:
example 1: as shown in fig. 1, an embodiment of the present invention discloses a method for judging an operation logic of a backup power automatic switching device adapted to a double bus, including:
and S101, randomly running the three spare power automatic switching power supply inlet wires on a first bus and a second bus.
And S102, judging whether the two buses are in split operation or not, wherein the split operation of the two buses is that the two spare power automatic switching power supply inlet wires are positioned on the first bus to operate, and the other spare power automatic switching power supply inlet wire is positioned on the second bus to operate.
Step S103, responding to the fault, and determining a bus with voltage loss according to the trip information; if the first bus is in voltage loss, when all the spare power automatic switching action conditions are met, the spare power automatic switching device connects the first bus and the second bus in a program mode, and controls the inlet wire of the other spare power automatic switching power supply running on the first bus to supply power to the first bus; and if the second bus is in voltage loss, the spare power automatic switching device controls the inlet wire of a spare power automatic switching power supply running on the first bus to supply power to the first bus and the second bus.
The step S103 specifically includes:
1. if the first bus is in voltage loss (when the two buses are in split operation, because the two spare power automatic switching power supply inlet wires are in operation on the first bus at the same time, the first bus is in voltage loss, which means that only one of the two spare power automatic switching power supply inlet wires supplies power to the first bus), the action judgment of the spare power automatic switching device comprises the following steps:
(1) acquiring spare power automatic switching judgment data, wherein the spare power automatic switching judgment data comprises the following steps: 1. the spare power automatic switching device under non-switching is directly connected to the bus voltage UI and UII of the first bus and the second bus; 2. after the backup power automatic switching device is switched in through two backup power automatic switching power supply incoming lines which run on the first bus, bus voltages UIq and UIIq of the first bus and the second bus (if two backup power automatic switching power supplies A and B exist, the backup power automatic switching device is switched in through the power supply incoming lines A and B, and then the bus voltages UIq and UIIq of the first bus and the second bus are switched in);
(2) judging whether the spare power automatic switching judgment data meets all spare power automatic switching action conditions or not; the spare power automatic switching action conditions comprise: 1. the spare power automatic switching device is switched in through two spare power automatic switching power inlet wires which run on the first bus and then the first bus and the second bus are subjected to voltage loss at the same time; 2. the two spare power automatic switching power supply inlet wires are positioned on the first bus to operate; 3. the bus voltage of the spare power automatic switching device directly connected to the first bus is 0 under non-switching, and the bus voltage connected to the second bus is not 0;
the spare power automatic switching operation condition is set according to the operation condition of 'bus voltage is not applied and incoming line does not flow' of the spare power automatic switching device.
(3) Responding to the first bus and the second bus, connecting the first bus and the second bus in a program of the spare power automatic switching device, and controlling another spare power automatic switching power inlet wire running on the first bus to supply power to the first bus;
2. and if the second bus is in voltage loss, the spare power automatic switching device controls a spare power automatic switching power supply inlet running on the first bus to supply power to the first bus and the second bus.
And step S104, responding to the judgment, if any spare power automatic switching power supply inlet wire is tripped to cause the voltage loss of the corresponding bus, the spare power automatic switching device controls other spare power automatic switching power supply inlet wires to supply power to the first bus and the second bus.
The invention discloses a method for judging action logic of a double-bus-adaptive spare power automatic switching device, which is characterized in that three spare power automatic switching power inlet wires of the spare power automatic switching device are randomly operated on a first bus and a second bus, and the realized bus is operated in a split mode.
Example 2: the embodiment of the invention discloses a method for judging the action logic of a spare power automatic switching device adaptive to double buses, which comprises the steps of introducing a disconnecting link, wherein each spare power automatic switching power inlet wire is connected with a first bus and a second bus through the disconnecting link, controlling and switching the buses connected with the spare power automatic switching power inlet wire to operate by the disconnecting link, and judging the operation modes of the two buses by a switch auxiliary position signal corresponding to each spare power automatic switching power inlet wire; and a breaker is arranged on each incoming line of the backup power automatic switching power supply, and whether the incoming line of the backup power automatic switching power supply supplies power to the bus is judged according to the position signal of the breaker. Therefore, for example, as shown in fig. 2 and 3, the method for determining the operation logic of the backup automatic switching device adapted to the double bus is as follows.
As shown in fig. 2 and 3, the present embodiment introduces the following conditions:
1. the two spare power automatic switching power supply inlet wires LA and LB and the third spare power automatic switching power supply inlet wire LC are respectively and randomly operated on a first bus and a second bus of the double buses through the breaker and the disconnecting link;
2. introducing two groups of bus voltages: a first set of voltages: the spare power automatic switching device is connected with the bus voltages UIq and UIIq of the switched first bus and the switched second bus through spare power automatic switching power inlet wires A and B; a second set of voltages: the spare power automatic switching device is directly connected to bus PT voltages UI and UII of the first bus and the second bus without switching;
3. leading in auxiliary position signals of incoming lines LA, LB and LC disconnecting link of 3 spare power automatic switching power supplies: KMa, KMb, KMc;
4. and introducing a circuit breaker position TWJc signal of a spare power automatic switching power supply inlet wire LC.
Secondly, the LA and LB disconnecting link auxiliary position signals KMa and KMb identify that the power supply incoming lines LA and LB operate on different buses, the bus tie breaker DL is in a branch position, and at the moment, the logic criterion of the spare power automatic switching device is as follows:
when any incoming line LA or LB is tripped, DLa or DLb is in a branch position, the voltage of a bus where the tripped incoming line of the spare power automatic switching power supply is located is subjected to voltage loss after the bus is switched, the incoming line does not flow, the logical condition of the spare power automatic switching action is met, the bus-coupled circuit breaker DL is closed, and the other circuit without power loss supplies power to the first bus and the second bus.
And (III) when the spare power automatic switching power supply inlet lines LA and LB are adjusted to be located on the first bus to operate, the circuit breakers DLa and DLb are both in the closed position, the bus coupler circuit breaker DL is in the open position, and the spare power automatic switching power supply inlet line LC supplies power to the second bus, as shown in figure 2.
As shown in fig. 2, if the spare power automatic switching power supply inlet line LA and the LB disconnecting link auxiliary position signals KMa and KMb judge that the lines LA and LB both operate on the same first bus, and the spare power automatic switching power supply inlet line LC disconnecting link auxiliary position signal KMc judges that the line LC operates on another second bus, the following criteria are implemented:
when the incoming line LC of the backup power automatic switching power supply trips, the second bus is in no-voltage state, the voltage UII of the second bus which is not switched is 0, the voltage UI of the first bus which is not switched is not 0 (at this time, the voltage of the bus which is switched by the incoming line LA and LB of the backup power automatic switching power supply is not 0), meanwhile, signals KMa and KMb of auxiliary positions of the incoming line LA and LB disconnecting links of the backup power automatic switching power supply are detected to be positioned on the first bus, a signal KMc of the auxiliary position of the LC disconnecting link of the backup power automatic switching power supply is positioned on the second bus, and the backup power automatic switching device receives a TWJc signal of the incoming line LC of the backup power automatic switching power supply, then sends a command of a DL of a bus coupler, and after the DL of the bus coupler is switched on, the incoming line LA and LB of the backup power automatic switching power supply carry loads of the first bus and the second bus.
And (IV) when the incoming line LA and LB of the spare power automatic switching power supply are adjusted to be positioned on the first bus to operate, the first bus is powered by the incoming line LA of the spare power automatic switching power supply, the circuit breaker DLA is in a closed position, the circuit breaker DLB is in an open position, the bus coupler circuit breaker DL is in an open position, and the second bus is powered by the incoming line LC of the spare power automatic switching power supply, as shown in the attached figure 3.
As shown in fig. 3, it is determined by auxiliary position signals KMa and KMb that the spare power automatic switching power inlet line LA and the LB are both located on the same first bus and operate, and that the auxiliary position signal KMc determines that the spare power automatic switching power inlet line LC is located on another second bus and operate, and then the following two situations can be divided:
1. when the incoming line LC of the backup power automatic switching power supply trips: when the second bus is in voltage loss, the voltage UII of the second bus which is not switched is 0, the voltage UI of the first bus is not 0 (at the moment, the voltage of the bus is not 0 after the switching of the incoming line LA and the LB of the spare power automatic switching power supply), meanwhile, the auxiliary position signals KMa and KMb of the incoming line LA and the LB of the spare power automatic switching power supply are detected to be positioned on the first bus, the auxiliary position signal KMc of the LC disconnecting link of the spare power automatic switching power supply is positioned on the second bus, and the spare power automatic switching device receives the TWJc signal of the incoming line LC of the spare power automatic switching power supply, then the spare power automatic switching device sends a command of a bus coupler DL, and after the bus coupler DL is closed, the incoming line LA of the spare power automatic switching power supply carries the loads of the first bus and the second bus;
2. when the incoming line LA of the backup power automatic switching power supply trips: when the first bus is in voltage loss, the LA circuit breaker is in a neutral position, the voltage UI of the first bus which is not switched is 0, and the voltage UI of the second bus which is not switched is not 0 (at the moment, the voltage of the bus is 0 after the incoming line LA and the LB of the spare power automatic switching power supply are switched), meanwhile, the auxiliary position signals KMa and KMb of the spare power automatic switching power supply incoming line and the LB disconnecting link are detected to be positioned on the first bus, and the auxiliary position signal KMc of the spare power automatic switching power supply incoming line LC disconnecting link is positioned on the second bus. When the following conditions are satisfied: (1) voltage of the buses is simultaneously lost after LA and LB are switched;
(2) the LA and LB switch auxiliary position signals KMa and KMb are both located at the I mother;
(3) the non-switching bus voltage UI is 0, and the UII is not 0;
firstly, a TWJ signal of the bus tie breaker DL is automatically set to be a logic closing position '0' by a program of the automatic backup power switching device, namely the closing position on the program, after the automatic backup power switching device detects that the first bus is not voltage and the incoming line is not current, a command of closing the incoming line LB breaker of the automatic backup power switching device is sent, and the incoming line LB of the automatic backup power switching device supplies power to the first bus.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. A method for judging the action logic of a spare power automatic switching device adapting to double buses is characterized by comprising the following steps:
randomly running three incoming lines of the spare power automatic switching power supply on a first bus and a second bus;
judging whether the two buses are in split operation or not, wherein the split operation of the two buses is that two spare power automatic switching power supply inlet wires are positioned on the first bus to operate, and the other spare power automatic switching power supply inlet wire is positioned on the second bus to operate;
responding to the fault, and determining the bus with voltage loss according to the trip information; if the first bus is in voltage loss, when all spare power automatic switching action conditions are met, the first bus is connected with the second bus in a spare power automatic switching device program, and the other spare power automatic switching power supply incoming line running on the first bus is controlled to supply power to the first bus; and if the second bus is in voltage loss, the spare power automatic switching device controls a spare power automatic switching power supply inlet running on the first bus to supply power to the first bus and the second bus.
2. The method for judging the action logic of the backup power automatic switching device adapting to the double buses as claimed in claim 1, wherein when the two buses are in split operation, the bus with voltage loss is determined according to trip information, and if the first bus has voltage loss, the action judgment logic of the backup power automatic switching device comprises:
acquiring spare power automatic switching judgment data; the spare power automatic switching judgment data comprises the following data: 1. the spare power automatic switching device under non-switching is directly connected to the bus voltage of the first bus and the second bus; 2. the spare power automatic switching device is connected with the bus voltage of the switched first bus and the second bus through two spare power automatic switching power inlet wires which run on the first bus;
judging whether the spare power automatic switching judgment data meets all spare power automatic switching action conditions or not; the spare power automatic switching action conditions comprise: 1. the spare power automatic switching device is switched in through two spare power automatic switching power inlet wires which run on the first bus and then the first bus and the second bus are subjected to voltage loss at the same time; 2. the two spare power automatic switching power supply inlet wires are positioned on the first bus to operate; 3. the bus voltage of the spare power automatic switching device directly connected to the first bus is 0 under non-switching, and the bus voltage connected to the second bus is not 0;
and responding to the response, connecting the first bus and the second bus in a program of the automatic backup power switching device, and controlling another automatic backup power switching power inlet wire operated on the first bus to supply power to the first bus.
3. The method for logically judging the action of the automatic backup power switching device suitable for the double buses according to claim 1 or 2, wherein when the two buses are not in split-column operation, if any automatic backup power switching power supply incoming line trips to cause voltage loss of the corresponding bus, the automatic backup power switching device controls the other automatic backup power switching power supply incoming lines to supply power to the first bus and the second bus.
4. The method for judging the action logic of the automatic bus transfer device adapting to the double buses of claim 1 or 2, further comprising introducing a disconnecting link, wherein each incoming line of the automatic bus transfer device is connected with the first bus and the second bus through the disconnecting link, the disconnecting link controls the switching of the buses connected with the incoming line of the automatic bus transfer device to operate, and the operating mode of the two buses is judged by the auxiliary position signal of the corresponding gate of each incoming line of the automatic bus transfer device.
5. The method for judging the action logic of the automatic backup power switching device suitable for the double buses according to claim 3, further comprising introducing a disconnecting link, wherein each incoming line of the automatic backup power switching device is connected with the first bus and the second bus through the disconnecting link, the disconnecting link controls the switching of the buses connected with the incoming line of the automatic backup power switching device to operate, and the operating mode of the two buses is judged according to the auxiliary position signal of the corresponding switch of each incoming line of the automatic backup power switching device.
6. The method for judging the action logic of the automatic backup power switching device suitable for the double buses according to the claim 1, 2 or 5, characterized in that a breaker is arranged on each incoming line of the automatic backup power switching device, and whether the incoming line of the automatic backup power switching device supplies power to the buses is judged according to the position signal of the breaker.
7. The method for judging the action logic of the automatic backup power switching device suitable for the double buses as claimed in claim 3, wherein a breaker is arranged on each incoming line of the automatic backup power switching device, and whether the incoming line of the automatic backup power switching device supplies power to the buses is judged according to a position signal of the breaker.
8. The method for judging the action logic of the automatic backup power switching device suitable for the double buses as claimed in claim 4, wherein a breaker is arranged on each incoming line of the automatic backup power switching device, and whether the incoming line of the automatic backup power switching device supplies power to the buses is judged according to a position signal of the breaker.
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