CN110601350B - High-voltage self-adaptive regional automatic switching system and automatic switching control method thereof - Google Patents
High-voltage self-adaptive regional automatic switching system and automatic switching control method thereof Download PDFInfo
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- CN110601350B CN110601350B CN201910901423.3A CN201910901423A CN110601350B CN 110601350 B CN110601350 B CN 110601350B CN 201910901423 A CN201910901423 A CN 201910901423A CN 110601350 B CN110601350 B CN 110601350B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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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- 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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Abstract
The 500kV and 220kV system electromagnetic ring network operates, so that the short-circuit current level of the whole system is increased, the thermal stability limit is reduced, and the 220kV power grid open-loop operation mode is necessary. After the open loop, the regional spare power automatic switching is an effective way for ensuring the power supply reliability. The invention provides a self-adaptive regional spare power automatic switching device which comprises a transformer substation A, a transformer substation B, a regional spare power automatic switching logic judging device, an acquisition executing unit and a power supply system main wiring, wherein the self-adaptive and regional spare power automatic switching functions are realized by acquiring reasonable analog quantity criteria and setting interval overhaul pressure plates and information remote transmission, various power grid structures and operation modes are met, the device has good engineering application value, and the device has important significance for improving the reliability of a power grid.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a high-voltage self-adaptive regional automatic switching system and a control method thereof, in particular to an on-site automatic switching function in a station and a regional automatic switching system between two stations when two groups of double-circuit lines are connected through a double-bus main line.
Background
With the mass production of power supply projects and power transmission and transformation projects, the 500kV/220kV power grid structure is continuously reinforced, the influence of the operation of an electromagnetic ring network and the increase of the short-circuit current level of the 220kV power grid are increasingly prominent, and therefore the open-loop operation of the 220kV power grid is necessary. After the open loop, in order to improve the power supply reliability, it is important to select a proper spare power automatic switching device.
The existing spare power automatic switching device is only suitable for the wiring condition of a single transformer substation, and a 220kV transformer substation after open-loop operation is adopted, so that the ring breaking point needs to be flexibly selected among at least 2 transformer substations. And the transformer substation circuit relates to a tie line and a power line, the operation mode is flexible and changeable, and the conventional spare power automatic switching device cannot meet the requirements.
Disclosure of Invention
The 220kV high-voltage power grid is of an area annular structure, generally, an open loop point selects any incoming line breaker of two substations, a tie line breaker or a sectionalized (bus-tie) breaker of the same substation, and according to wiring characteristics, the open loop point selects a plurality of operation modes shared between the incoming line breaker and the tie breaker, as shown in fig. 1:
In the operation mode 1, the DL12 is hot standby, the other 5 circuit breakers are in position, the incoming line DL11 is powered off, so that the transformer substation A is powered off, the spare power automatic switching action breaks off the incoming line DL11, the DL12 is closed, and the power supply of the transformer substation A is recovered.
In the operation mode 2, the incoming line DL11 is hot standby, the other 5 circuit breakers are in position, DL12 is powered off, so that the transformer substation A is powered off, the spare power automatic switching action jumps off DL12, the incoming line DL11 is closed, and the power supply of the transformer substation A is recovered.
And in the operation mode 3, the DL22 is hot for standby, the other 5 circuit breakers are in position, the incoming line DL11 is powered off, so that the transformer substation A is powered off, the spare power automatic switching action breaks off the incoming line DL11, the DL22 is closed, and the power supply of the transformer substation A is recovered.
The wiring mode is a common wiring mode of a 110kV transformer substation of a power grid, the 110kV transformer substation is also connected in other modes, the 220kV transformer substation is mainly double-bus wiring, and the incoming line is more than two return lines. The invention provides a high-voltage self-adaptive area automatic backup power switching system, which can meet various main wiring forms on site and is automatically adapted without manual operation by analyzing main wiring of various forms.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The high-voltage self-adaptive regional spare power automatic switching system comprises a transformer substation A, a transformer substation B, a regional spare power automatic switching device and a main wiring of a power supply system.
The regional spare power automatic switching device comprises a regional spare power automatic switching logic discriminating device and an acquisition executing unit;
the collecting and executing unit collects analog quantity information such as voltage and current of the transformer substation and switching value information such as switching positions, and meanwhile receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic discriminating device;
The regional spare power automatic switching logic judging device receives the acquisition information of the acquisition execution unit and carries out logic judgment of the regional spare power automatic switching strategy, and the logic judgment basis is that the voltage is applied by judging that the line voltage and the bus voltage connected with the circuit breaker are simultaneously out of voltage.
And the main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model.
As shown in fig. 3 a), DL11 and DL12 may operate in either the I or II parent, and the power supply conditions of power source 1 and power source 2 cannot be determined by the I parent TV and the II parent TV, so that adaptive logic determination cannot be performed. The invention regards the circuit breaker DL and the bus (I bus or II bus) as a whole, and determines whether the power supply connected with the bus is changed from normal power supply to no voltage by judging whether the voltage after switching is adopted, as shown in figure 3 b), namely whether the circuit voltage and the bus voltage connected with the circuit breaker are simultaneously out of voltage.
The circuit breaker and the bus are bound as a power supply, and the meaning of the circuit breaker and the bus is that the circuit breaker and the bus on a certain section of bus are regarded as a whole, and when judging, the circuit voltage is added as one of the criteria, and the voltage of the bus and the voltage of the circuit are simultaneously lost, so that the voltage loss of the power supply can be indicated. By adopting the mode, the self-adaption of various wiring conditions can be realized.
Further, the area acquisition execution unit comprises a mutual inductor and an A/D, DSP; the mutual inductor comprises a conventional mutual inductor and an electronic mutual inductor, wherein the conventional mutual inductor is connected with the DSP through an A/D, and the electronic mutual inductor is directly connected with the DSP.
Furthermore, the self-adaptive area spare power automatic switching model adopts a double-bus wiring mode, and each power supply or each line is connected to two groups of buses through a circuit breaker and two groups of isolating switches.
Furthermore, the self-adaptive area standby power automatic switching model is provided with two power supplies, namely a main power supply and a standby power supply. The invention mainly aims at regional standby power automatic switching of two transformer substation stations, so that the two power supplies comprise two power supplies, namely one main power supply and one standby power supply, the main power supply is powered off, the main power supply is disconnected, and the standby power supply is switched on.
Further, each circuit breaker is provided with an overhaul pressure plate.
The purpose is that the transformer substation may have the condition of multiple incoming lines, and the automatic backup power switch can only be the automatic backup power switch of two power supplies, and the non-power supply circuit does not participate in the automatic backup power switch logic judgment through the input of the overhaul pressing plate, so that the rapid logic judgment of the regional automatic backup power switch is realized.
Further, the transformer substation is respectively configured with the regional automatic switching device, so that the conventional automatic switching function in the transformer substation can be realized, and the function of mutual standby between the two transformer substations can also be realized.
Furthermore, the regional spare power automatic switching device comprises an optical transmitting unit and an optical receiving unit, and the two regional spare power automatic switching devices are directly connected through optical fibers to conduct information communication.
The invention also provides a spare power automatic switching control method of the spare power automatic switching system of the high-voltage self-adaptive area, which comprises the following steps:
step 1: the regional spare power automatic switching logic judging device acquires state information through an acquisition execution unit in the transformer substation;
step 2: completing charging preparation;
step 3: the regional spare power automatic switching logic judging device judges the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply of the transformer substation comprehensively, and starts the action logic of regional spare power automatic switching;
Step 4: and the acquisition execution unit executes a command according to the action logic result of the regional spare power automatic switching logic discrimination device.
Further, the status information includes, but is not limited to: the voltage state, line voltage, line current state and position state of each line switch of the whole power supply in the self-adaptive area spare power automatic switching model. Further, the switched voltage is used to determine whether the current power supply of the station is a power supply, and whether the power supply is a non-fully-integrated substation or a fully-integrated substation, and then different action logics are implemented:
For the non-fully-closed transformer substation, the action logic of the regional spare power automatic switching is in a charging completion state; starting a remote switching logic for starting when the discharging condition is not met, and when a switching signal of a full-closing station starting standby automatic switching signal is received, executing a command by an acquisition execution unit and ending the action logic of the regional standby automatic switching; judging whether the discharging condition is met or not again without receiving a closing signal command; and (5) finishing the action logic of the area spare power automatic switching when the discharge condition is met.
For the fully-integrated transformer substation, the action logic of the regional spare power automatic switching is in a charging completion state; starting a non-voltage tripping logic when the discharging condition is not met, locking the spare power automatic switching, and sending a locking contact to a non-total station; the non-voltage tripping logic fails, trips and starts the spare power automatic switching of the non-total station; and finishing the action logic of the area spare power automatic switching when the discharge condition is met.
The invention regards the breaker and the bus as a whole, and judges the power supply condition of the power supply by adopting the existence of the voltage after switching, thereby judging the position state of each line switch so as to realize the high-voltage self-adaptive area spare power automatic switching logic with different wiring modes; aiming at the condition of multi-circuit incoming line, by putting an overhaul pressing plate in the circuit breaker circuit, the non-power circuit does not participate in the automatic spare power switching logic judgment, and the regional automatic spare power switching quick logic judgment is realized. The self-adaptive area automatic switching device provided by the invention accords with the basic principle of automatic switching, and has high self-adaptation degree and perfect functions. The whole set of tests and the current operation conditions prove that the device can adapt to various operation modes of various main wiring and has good engineering application value.
Drawings
FIG. 1 is a schematic diagram of a prior art wiring operation mode;
FIG. 2 is a schematic diagram of an adaptive area spare power automatic switching model according to the present invention;
FIG. 3 is a schematic diagram of a dual bus connection voltage switch according to the present invention;
FIG. 4 is a schematic diagram of a high-voltage adaptive area automatic switching system of the present invention;
FIG. 5 is a schematic diagram of a spare power automatic switching communication mode of a region where two substations are standby;
FIG. 6 is a flow chart of the backup power automatic switching operation of the non-fully-closed transformer substation;
FIG. 7 is a flow chart of the fully integrated substation backup power automatic switching operation;
fig. 8 is a schematic diagram of an adaptive area spare power automatic switching model according to embodiment 2 of the present invention;
Fig. 9 is a schematic diagram of an adaptive area spare power automatic switching model according to embodiment 3 of the present invention;
Fig. 10 is a schematic diagram of an adaptive area spare power automatic switching model according to embodiment 4 of 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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The high-voltage self-adaptive area spare power automatic switching system schematic diagram and the area spare power automatic switching communication mode of two substations which are spare are shown in fig. 4 and 5.
The utility model provides a high-voltage self-adaptation regional spare power automatic switching system, includes transformer substation A, transformer substation B, regional spare power automatic switching device and power supply system main wiring:
the regional spare power automatic switching device comprises a regional spare power automatic switching logic discriminating device and an acquisition executing unit;
the collecting and executing unit collects analog quantity information such as voltage and current of the transformer substation and switching value information such as switching positions, and meanwhile receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic discriminating device;
the regional spare power automatic switching logic judging device receives the acquisition information of the acquisition execution unit and carries out logic judgment of a regional spare power automatic switching strategy;
and the main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model.
The schematic diagram of the self-adaptive area spare power automatic switching model is shown in fig. 2: TVLA1, TVLA2, TVMA1, TVMA2, TVMB1, TVMB2, TVLB1, TVLB are secondary voltages after switching of the busbar TV, and are independent of the position of the circuit breaker and only related to the position of the disconnecting switch; TVLa1, TVLa2, TVMa1, TVMa2, TVMb1, TVMb2, TVLb1, TVLb2 are line voltages. The combination of the switched voltage and the line voltage is a criterion for judging whether the power supply is out of voltage or not, and the voltage loss of the switched voltage and the line voltage judges that the power supply is out of voltage, and the voltage loss of the switched voltage and the line voltage judges that the power supply is in voltage.
For the voltage after the double bus wiring voltage is switched, the voltage is only related to the position of the disconnecting link and is irrelevant to the position of the circuit breaker, when the circuit is connected to the I bus, the normally open auxiliary contact of the I bus disconnecting link is closed, the normally closed auxiliary contact of the II bus is closed, the secondary voltage is connected to the I bus TV, and the circuit and the I bus are in 'binding' connection as a power supply. When the circuit is connected to the II master, the normally open auxiliary contact of the II master disconnecting link is closed, the normally closed auxiliary contact of the I master is closed, the secondary voltage is connected to the II master TV, and the circuit and the II master are in 'binding' with each other to form a power supply. From the above analysis, it is clear that the post-switching voltage to achieve line to busbar correlation is only dependent on the knife switch position and not on the breaker position.
Preferably, the self-adaptive area standby power automatic switching model is provided with two power supplies, namely a main power supply and a standby power supply. The invention mainly aims at regional standby power automatic switching of two transformer substation stations, so that the two power supplies comprise two power supplies, namely one main power supply and one standby power supply, the main power supply is powered off, the main power supply is disconnected, and the standby power supply is switched on.
Preferably, the self-adaptive area spare power automatic switching model adopts a double-bus wiring mode, as shown in fig. 2, and each power supply or each line is connected to two groups of buses through a circuit breaker and two groups of isolating switches. By adopting the mode, the self-adaption of various wiring conditions can be realized.
The circuit breaker and the bus are bundled as a power supply, and the meaning of the circuit breaker and the bus are regarded as a whole on a certain section of bus, and the voltage loss of the bus represents the voltage loss of the power supply. When judging, the line voltage is used as one of the criteria, and the bus voltage and the line voltage are simultaneously out-of-voltage to indicate the power supply out-of-voltage.
Preferably, the circuit breakers and the bus bars form an integral power supply, and each circuit breaker is provided with an overhaul pressure plate. The purpose is that the transformer substation may have a plurality of power accesses, and the spare power automatic switching is only the spare power automatic switching of two power supplies, and other power supplies are not involved in the logical judgment of the spare power automatic switching through the input of the overhaul pressing plate.
The transformer substation is respectively configured with the regional spare power automatic switching device, so that the conventional spare power automatic switching function in the transformer substation can be realized, and the function of mutual standby between two transformer substations can also be realized.
Preferably, the area spare power automatic switching device comprises an optical emitting unit and an optical receiving unit, and the two area spare power automatic switching devices are directly connected through optical fibers to conduct information communication, as shown in fig. 5.
The invention also provides a spare power automatic switching control method of the spare power automatic switching system of the high-voltage self-adaptive area, which comprises the following steps:
step 1: the regional spare power automatic switching logic judging device acquires state information through an acquisition execution unit in the transformer substation; the status information includes, but is not limited to: the method comprises the steps of (1) in a self-adaptive area spare power automatic switching model, the voltage state of an integral power supply, the line voltage, the line current state and the position state of each line switch;
step 2: completing charging preparation;
step 3: the regional spare power automatic switching logic judging device judges the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply of the transformer substation comprehensively, and starts the action logic of regional spare power automatic switching;
Step 4: and the acquisition execution unit executes a command according to the action logic result of the regional spare power automatic switching logic discrimination device.
For the action logic of the regional spare power automatic switching of the non-fully-closed transformer substation, see fig. 6, the action logic of the regional spare power automatic switching is in a charging completion state; starting a remote switching logic for starting when the discharging condition is not met, and when a switching signal of a full-closing station starting standby automatic switching signal is received, executing a command by an acquisition execution unit and ending the action logic of the regional standby automatic switching; judging whether the discharging condition is met or not again without receiving a closing signal command; and (5) finishing the action logic of the area spare power automatic switching when the discharge condition is met.
For the action logic of the regional spare power automatic switching of the fully-closed transformer substation, see fig. 7, the action logic of the regional spare power automatic switching is in a charging completion state; starting a non-voltage tripping logic when the discharging condition is not met, locking the spare power automatic switching, and sending a locking contact to a non-total station; the non-voltage tripping logic fails, trips and starts the spare power automatic switching of the non-total station; and finishing the action logic of the area spare power automatic switching when the discharge condition is met.
Example 2
Double-circuit line 1 runs, and double-circuit line 2 spare area automatic switching is shown in fig. 8:
Charging conditions: 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 word is input, the double-circuit line group 2 line voltage meets the voltage condition (# 2 line or #4 line is voltage); or when the regional 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 after the regional spare power automatic switching charging time, the charging is completed.
Discharge conditions: 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 the circuit voltage of the opposite side #2 does not meet the voltage condition or the opposite side 2DL is in the split position when the area spare power automatic switching is input, 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 overhaul pressing plate withdraws, the single-nut operation overhaul pressing plate jumps the nut switch by hand;
4) The 'blocking standby 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-nut operation overhaul 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 overhaul pressing plate II', the protection action of the mother 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) The double-circuit line group 1 switch or the bus-tie switch refuses to jump;
7) Exiting the regional spare power automatic switching;
8) And the #1 wire inlet overhaul pressing plates and the #3 wire inlet overhaul pressing plates are respectively put into operation, or the #2 wire inlet overhaul pressing plates and the #4 wire inlet overhaul pressing plates are respectively put into operation.
The action process is as follows:
After the charging is completed, if the circuit voltage of the double-circuit line group 2 checks that the control word is input, the circuit voltage of the double-circuit line group 2 meets the condition that the pressure is applied to the circuit (# 2 or # 4), or the circuit voltage of the opposite side #2 is applied with pressure and the opposite side 2DL is in a closing position when the area spare power automatic switching input is normal and the communication is normal, or the circuit voltage of the opposite side #4 is applied with pressure and the opposite side 4DL is in a closing position, 1) the voltage of the double-circuit line group 1 is not applied with pressure and the voltage of the double-circuit line group 2 is not applied with pressure (the circuit voltage is smaller than a non-pressure starting fixed value), the double-circuit line group 1 is not applied with flow (I1 and I3), the double-circuit line group 1 is separated or is closed with pressure of the circuit is not applied with pressure, and the double-circuit line group 1 is jumped with pressure is not applied with pressure, and the double-circuit group 1 is jumped with time delay Tt1 (1 DL and 3 DL) and the double-circuit is jumped. 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 2is 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 2is 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.
Example 3
Double-circuit line 1 is standby, double-circuit line 2 is running, see fig. 9:
Charging conditions:
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 after the standby automatic switching charging time, the charging is completed.
Discharge conditions:
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-jumping double-circuit line group 2 switch; when the single-nut operation pressing plate withdraws, the single-nut operation pressing plate jumps the nut switch by hand;
4) The 'blocking standby 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) The double-circuit line group 1 switch or the double-circuit line group 2 switch is abnormal;
6) The double-circuit line group 2 switch or the bus-tie switch refuses to jump;
7) Setting a control word or a soft pressing plate to withdraw from the area standby automatic switching mode;
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 inlet overhaul pressing plates and the #3 wire inlet overhaul pressing plates are respectively put into operation, or the #2 wire inlet overhaul pressing plates and the #4 wire inlet overhaul pressing plates are respectively put into operation.
The action process 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 group1 and the voltage cut by the double-circuit line group2 are both non-voltage (the line voltages are smaller than the non-voltage starting fixed value), the double-circuit line group2 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 group2 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 group2 switch is tripped (if a remote self-switching signal is started on the opposite side, whether the double-circuit line group1 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 group1 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.
Example 4
The local station is closed loop, the opposite station is open loop, see fig. 10:
Charging conditions: 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 after the standby automatic switching charging time, the charging is completed.
Discharge conditions: 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-jumping double-circuit line group 1 switch; when the single-nut operation pressing plate withdraws, the single-nut operation pressing plate jumps the nut switch by hand;
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) The double-circuit line group 1 is abnormal in switching;
5) The double-circuit line group 1 switch or the bus-tie switch refuses to jump;
6) Setting the control word or the soft pressing plate to withdraw from the automatic switching mode 6;
7) And the #1 wire inlet overhaul pressing plates and the #3 wire inlet overhaul pressing plates are respectively put into operation, or the #2 wire inlet overhaul pressing plates and the #4 wire inlet overhaul pressing plates are respectively put into operation.
The action process is as follows:
1) When the charging is completed, 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 a split position or in a combined position and the line is not pressed, and after the time delay Tt6, the double-circuit line group 1 switches (1 DL and 3 DL) are jumped, and meanwhile, the I bus and the II bus are jumped 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.
Embodiments 2 to 4 illustrate that the high-voltage adaptive area spare power automatic switching system provided by the invention can effectively implement logic actions for different wiring modes, and has adaptivity.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a high-voltage self-adaptation regional spare power automatic switching system, includes transformer substation A, transformer substation B, regional spare power automatic switching device and power supply system main wiring, its characterized in that:
the regional spare power automatic switching device comprises a regional spare power automatic switching logic discriminating device and an acquisition executing unit;
The collecting and executing unit collects voltage and current analog quantity information and switch position switch quantity information of the transformer substation, and simultaneously receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic discriminating device;
the regional spare power automatic switching logic judging device receives the acquisition information of the acquisition execution unit and carries out logic judgment of a regional spare power automatic switching strategy;
the main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model;
The self-adaptive area standby power automatic switching model is provided with two power supplies, namely a main power supply and a standby power supply;
The self-adaptive area spare power automatic switching model adopts a double-bus wiring mode, and each power supply or each line is connected to two groups of buses through a circuit breaker and two groups of isolating switches;
Each circuit breaker is provided with an overhaul pressing plate;
the transformer substation is respectively provided with the regional spare power automatic switching device, so that the conventional spare power automatic switching function in the transformer substation can be realized, and the function of mutual standby between two transformer substations can also be realized;
The self-adaptive area spare power automatic switching model comprises a first double-circuit line group and a second double-circuit line group, wherein the first double-circuit line group operates, the second double-circuit line group is reserved, and the charging condition and the discharging condition of the self-adaptive area spare power automatic switching model are as follows;
Charging conditions:
1) The first double-circuit line group voltage-cutting voltage and the second double-circuit line group voltage-cutting voltage are both three-phase voltage;
2) When the second double-circuit line voltage check control word is input, the second double-circuit line voltage meets the voltage condition, and the voltage condition comprises that the #2 line or the #4 line is voltage; or when the regional 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;
the #2 line and the #4 line are lines in the second double-circuit line group;
3) The first double-circuit line group switch is in a combined position, and the second double-circuit line group switch is in a split position; charging is completed after the regional spare power automatic switching charging time;
discharge conditions:
1) When the line voltage of the second double-circuit line does not meet the voltage condition when the line voltage check control word of the second double-circuit line is input, the line voltage of the opposite side #2 does not meet the voltage condition or the opposite side 2DL is in the split position when the area spare power automatic switching is input, the line 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 of the 2DL and 4DL switches is closed;
3) Without trip outlet: the first double-circuit line switch is jumped by hand, namely KKJ1 and KKJ3 are both changed to 0; when the single-nut operation overhaul pressing plate withdraws, the single-nut operation overhaul pressing plate jumps the nut switch by hand;
4) The automatic switching device is provided with a locking standby power supply; 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-nut operation overhaul pressing plate is withdrawn: when the #1 circuit and the #3 circuit are positioned on the II female pressing plate and withdraw from the II female pressing plate, the II female protection action is started; when the #1 line and the #3 line are positioned on the II female overhaul pressing plate, the I female protection action is started;
the #1 line and the #3 line are lines in the first double-circuit line group;
5) TWJ of either the first or second two-way set of switches is abnormal;
6) The first double-circuit line switch or the bus-tie switch refuses to jump;
7) Exiting the regional spare power automatic switching;
8) And the #1 wire inlet overhaul pressing plates and the #3 wire inlet overhaul pressing plates are respectively put into operation, or the #2 wire inlet overhaul pressing plates and the #4 wire inlet overhaul pressing plates are respectively put into operation.
2. The high-voltage self-adaptive area automatic switching system according to claim 1, wherein the area automatic switching device comprises an optical emitting unit and an optical receiving unit, and the two area automatic switching devices are directly connected through optical fibers to conduct information communication.
3. A spare power automatic switching control method of a high-voltage self-adaptive regional spare power automatic switching system is characterized by comprising the following steps:
step 1: the regional spare power automatic switching logic judging device acquires state information through an acquisition execution unit in the transformer substation;
step 2: completing charging preparation;
step 3: the regional spare power automatic switching logic judging device judges the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply of the transformer substation comprehensively, and starts the action logic of regional spare power automatic switching;
Step 4: the acquisition execution unit executes a command according to an action logic result of the regional backup power automatic switching logic discrimination device;
The status information includes: the method comprises the steps of (1) in a self-adaptive area spare power automatic switching model, the voltage state of an integral power supply, the line voltage, the line current state and the position state of each line switch;
The self-adaptive area spare power automatic switching model comprises a first double-circuit line group and a second double-circuit line group, wherein the first double-circuit line group operates, the second double-circuit line group is reserved, and the charging condition and the discharging condition of the self-adaptive area spare power automatic switching model are as follows;
Charging conditions:
1) The first double-circuit line group voltage-cutting voltage and the second double-circuit line group voltage-cutting voltage are both three-phase voltage;
2) When the second double-circuit line voltage check control word is input, the second double-circuit line voltage meets the voltage condition, and the voltage condition comprises that the #2 line or the #4 line is voltage; or when the regional 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;
the #2 line and the #4 line are lines in the second double-circuit line group;
3) The first double-circuit line group switch is in a combined position, and the second double-circuit line group switch is in a split position; charging is completed after the regional spare power automatic switching charging time;
discharge conditions:
1) When the line voltage of the second double-circuit line does not meet the voltage condition when the line voltage check control word of the second double-circuit line is input, the line voltage of the opposite side #2 does not meet the voltage condition or the opposite side 2DL is in the split position when the area spare power automatic switching is input, the line 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 of the 2DL and 4DL switches is closed;
3) Without trip outlet: the first double-circuit line switch is jumped by hand, namely KKJ1 and KKJ3 are both changed to 0; when the single-nut operation overhaul pressing plate withdraws, the single-nut operation overhaul pressing plate jumps the nut switch by hand;
4) The automatic switching device is provided with a locking standby power supply; 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-nut operation overhaul pressing plate is withdrawn: when the #1 circuit and the #3 circuit are positioned on the II female pressing plate and withdraw from the II female pressing plate, the II female protection action is started; when the #1 line and the #3 line are positioned on the II female overhaul pressing plate, the I female protection action is started;
the #1 line and the #3 line are lines in the first double-circuit line group;
5) TWJ of either the first or second two-way set of switches is abnormal;
6) The first double-circuit line switch or the bus-tie switch refuses to jump;
7) Exiting the regional spare power automatic switching;
8) And the #1 wire inlet overhaul pressing plates and the #3 wire inlet overhaul pressing plates are respectively put into operation, or the #2 wire inlet overhaul pressing plates and the #4 wire inlet overhaul pressing plates are respectively put into operation.
4. The method for controlling the spare power automatic switching of the high-voltage self-adaptive regional spare power automatic switching system according to claim 3, wherein for a non-fully-closed transformer substation, the action logic of the regional spare power automatic switching is in a charging completion state; starting a remote switching logic for starting when the discharging condition is not met, and when a switching signal of a full-closing station starting standby automatic switching signal is received, executing a command by an acquisition execution unit and ending the action logic of the regional standby automatic switching; judging whether the discharging condition is met or not again without receiving a closing signal command; and (5) finishing the action logic of the area spare power automatic switching when the discharge condition is met.
5. The method for controlling the spare power automatic switching of the high-voltage self-adaptive regional spare power automatic switching system according to claim 3, wherein for a fully-closed transformer substation, the action logic of the regional spare power automatic switching is in a charging completion state; starting a non-voltage tripping logic when the discharging condition is not met, locking the spare power automatic switching, and sending a locking contact to a non-total station; the non-voltage tripping logic fails, trips and starts the spare power automatic switching of the non-total station; and finishing the action logic of the area spare power automatic switching when the discharge condition is met.
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CN112731028A (en) * | 2020-12-23 | 2021-04-30 | 贵州电网有限责任公司 | Automatic bus transfer logic function detection system based on ADPSS simulation platform |
CN114498898B (en) * | 2022-01-14 | 2023-05-05 | 云南电网有限责任公司曲靖供电局 | Power supply line power attribute identification and judgment method and automatic switching method |
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