CN211127277U - High-voltage self-adaptive regional spare power automatic switching system - Google Patents
High-voltage self-adaptive regional spare power automatic switching system Download PDFInfo
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- CN211127277U CN211127277U CN201921584951.2U CN201921584951U CN211127277U CN 211127277 U CN211127277 U CN 211127277U CN 201921584951 U CN201921584951 U CN 201921584951U CN 211127277 U CN211127277 U CN 211127277U
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Abstract
The electromagnetic ring network of 500kV and 220kV systems operates, 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 very necessary. After the ring is opened, the regional spare power automatic switching is adopted to be an effective mode for ensuring the reliability of power supply. The utility model provides a regional automatic switching system that is equipped with of high pressure self-adaptation, including transformer substation A, transformer substation B, regional automatic switching logic decision device, collection execution unit and power supply system main wiring, through gathering reasonable analog quantity criterion, setting up interval maintenance clamp plate and information teletransmission, realize self-adaptation and the function of throwing fully automatically in the distant place, satisfy various electric wire netting structures and operational mode, have better engineering using value, have the significance to improving the electric wire netting reliability.
Description
Technical Field
The utility model belongs to the technical field of electric power, concretely relates to regional spare power automatic switching system of high pressure self-adaptation especially relates to a station during two sets of double circuit lines of double bus main wiring in-situ spare power automatic switching function and two stations distant place spare power automatic switching system.
Background
With the mass production of power supply projects and power transmission and transformation projects, the 500kV/220kV power grid structure is continuously strengthened, the influence of the operation of an electromagnetic ring network and the increase of the short-circuit current level of a 220kV power grid are increasingly highlighted, and therefore the 220kV power grid needs to be operated in an open loop mode. After the loop is opened, in order to improve the reliability of power supply, it is very important to select a proper spare power automatic switching device.
The existing backup automatic switching device is usually only suitable for the wiring condition of a single transformer substation, and a 220kV transformer substation operated in an open loop mode needs to flexibly select a loop breaking point among 2 transformer substations at least. And the transformer substation circuit involves tie line, power cord, and the operation mode is nimble changeable, uses conventional spare power automatic switching device, can't satisfy the requirement.
SUMMERY OF THE UTILITY MODEL
The utility model provides an above-mentioned condition, provide a regional spare power automatic switching system of various electric wire netting structures of self-adaptation, regional spare power automatic switching is the spare power automatic switching of two transformer substations.
In order to achieve the above object, the utility model provides a following technical scheme:
a high-voltage self-adaptive regional automatic backup power switching system comprises a transformer substation A, a transformer substation B, a regional automatic backup power switching device and a main wiring of a power supply system,
the regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information of voltage and current of a transformer substation and switching quantity information of a switching position, and receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and performs logic judgment on 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.
220kV high voltage electric network is regional loop configuration, and generally the ring opening point selects arbitrary inlet wire circuit breaker of two transformer substations, and tie line circuit breaker or same transformer substation segmentation (female tie) circuit breaker according to the wiring characteristics, open the ring point and select at inlet wire circuit breaker and the total three kinds of operational modes of tie circuit breaker, as shown in fig. 1:
in the operation mode 1 (see fig. 1 (a)), the D L12 is in hot standby, the other 5 breakers are closed, the incoming line D L11 loses power, so that the voltage of the substation a is lost, the standby power automatic switching action jumps off the incoming line D L11, the D L12 is closed, and the power supply of the substation a is recovered.
In the operation mode 2 (see fig. 1 (b)), the incoming line D L11 is in hot standby, the other 5 breakers are closed, the D L12 loses power, the voltage of the substation a is lost, the backup power automatic switching action trips to the D L12, the incoming line D L11 is closed, and the power supply of the substation a is recovered.
In the operation mode 3 (see fig. 1 (c)), the D L22 is in hot standby, the other 5 breakers are closed, the incoming line D L11 loses power, the voltage of the substation a is lost, the backup power automatic switching action jumps to the incoming line D L11, the D L22 is closed, and the power supply of the substation a is recovered.
The self-adaptive regional spare power automatic switching device has the advantages that when the operation mode is changed, the device can automatically adapt to the situation without manual operation, and various main wiring modes on site can be met.
Through the main wiring of analyzing various forms, the utility model provides a self-adaptation region is equipped with automatic switching model, this model can be when the operation mode changes, and automatic adaptation need not manual operation and can satisfy the various main wiring forms in scene.
Further, the acquisition execution unit comprises a mutual inductor, 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 the A/D, and the electronic mutual inductor is directly connected with the DSP. When the DSP is connected with a conventional mutual inductor, synchronous data acquisition is carried out; when the DSP is connected with the electronic transformer, synchronous sampling data can be received in real time.
Furthermore, the regional spare power automatic switching device also comprises a power supply liquid crystal display.
Further, the self-adaptive area spare power automatic switching model is provided with two power supplies, namely a main power supply and a spare power supply. The utility model discloses mainly be equipped with the automatic switch-on to the region of two transformer substation stations, consequently including two powers, two power one is main one is equipped with, and main power supply loses the electricity, jumps off main power supply, closes and is equipped with the power supply.
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.
As shown in (a) of FIG. 3, D L and D L can be operated on the I bus or the II bus, and the supply and standby conditions of the power supply 1 and the power supply 2 cannot be judged through the I bus TV and the II bus TV, so that the self-adaptive logic judgment cannot be carried out.
The circuit breaker and the bus are bound to form a power supply, the circuit breaker and the bus on a certain section of bus are regarded as a whole, line voltage is added to serve as one of criteria during judgment, and the fact that the bus voltage and the line voltage lose voltage at the same time can indicate that the power supply loses voltage. By adopting the mode, the self-adaption of various wiring conditions can be realized.
Further, circuit breaker and generating line form whole power, every circuit breaker all sets up the maintenance clamp plate. The method aims to solve the problem that a transformer substation can be accessed by a plurality of power supplies, the spare power automatic switching is only spare power automatic switching of two power supplies, and the rest power supplies do not participate in the logic judgment of the spare power automatic switching through the switching of the maintenance pressing plate.
Furthermore, the transformer substation is respectively provided with the regional spare power automatic switching devices, so that the conventional spare power automatic switching function in the substation can be realized, and the function that two substations are mutually spare can also be realized.
Furthermore, the regional automatic backup power switching device comprises a light emitting unit and a light receiving unit, and the two regional automatic backup power switching devices are directly connected through optical fibers to perform data transmission or information exchange.
Furthermore, the regional automatic spare power switching device can be connected with a terminal multiplexing device with a same-direction interface through a multiplexing interface device with a light receiving unit and a light emitting unit for data transmission.
The working principle of the spare power automatic switching device of the high-voltage self-adaptive area spare power automatic switching system is as follows:
step 1: the regional automatic bus transfer logic judgment device acquires state information through an acquisition execution unit in a transformer substation;
step 2: completing the charging preparation;
and step 3: the regional automatic bus transfer logic judgment device is used for judging the voltage state, the line voltage and the line current state of the integral power supply of the transformer substation and the position state of each line switch in a comprehensive mode and starting the action logic of regional automatic bus transfer;
and 4, step 4: and the acquisition execution unit executes a command according to the action logic result of the regional automatic bus transfer logic judgment device.
Further, the status information includes, but is not limited to: and the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply in the self-adaptive regional spare power automatic switching model. And then, the voltage after switching is adopted to judge whether the current power supply of the station is a power supply, whether the current power supply is an incomplete transformer station or an incomplete transformer station, and then different action logics are implemented:
for a non-fully-closed transformer substation, the action logic of the regional spare power automatic switching device is in a charging completion state; if the discharging condition is not met, starting remote switching-on standby logic starting, and when a switching-on signal sent by a full switching-on station starting backup power automatic switching signal is received, executing a command by an acquisition execution unit and finishing the action logic of regional backup power automatic switching; judging whether the discharging condition is met or not again when the command of the closing signal is not received; and finishing the action logic of the regional backup power automatic switching when the discharging condition is met.
For a fully-closed transformer substation, the action logic of the regional backup power automatic switching is that the action logic of the regional backup power automatic switching is in a charging completion state; if the discharging condition is not met, starting a non-voltage tripping logic, locking the spare power automatic switching device, and sending a locking contact to a non-fully closed station; when the non-voltage tripping logic fails, tripping and starting the non-fully closed station spare power automatic switching; and if the discharging condition is met, ending the action logic of the regional backup power automatic switching.
The utility model takes the breaker and the bus as a whole, judges the power supply status of the power supply by adopting the voltage after switching, and further judges the position state of each circuit switch, so as to realize the high-voltage self-adaptive area spare power automatic switching logic of different wiring modes; aiming at the condition of multiple incoming lines, the maintenance pressing plate is put into the circuit of the circuit breaker, so that the non-power supply circuit does not participate in the logic judgment of the spare power automatic switching, and the rapid logic judgment of the regional spare power automatic switching is realized. The self-adaptive regional spare power automatic switching device conforms to the basic principle of spare power automatic switching, and is high in self-adaptive degree and complete in function. 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 better engineering application value.
Drawings
Fig. 1 is a schematic diagram of a wiring operation mode in the prior art: wherein, (a) is an operation mode 1, (b) is an operation mode 2, and (c) is an operation mode 3;
fig. 2 is a schematic diagram of the self-adaptive area backup power automatic switching model of the present invention;
fig. 3 is the utility model discloses a double bus connects voltage switching schematic diagram: wherein, (a) is a double-bus wiring mode 1, and (b) is a double-bus wiring mode 2;
fig. 4 is a schematic diagram of the high-voltage self-adaptive regional backup automatic switching system of the present invention;
fig. 5 is a schematic view of the regional automatic bus transfer device of the present invention;
fig. 6 is a schematic diagram of the communication mode of the two substations of the present invention for mutual backup, wherein (a) is a dedicated optical fiber connection mode, and (b) is a 2Mbit/s multiplexing connection mode;
FIG. 7 is a flow chart of the backup power automatic switching operation of the non-integrated substation;
FIG. 8 is a flow chart of the automatic bus transfer operation of the integrated substation;
fig. 9 is a schematic diagram of an adaptive regional backup power automatic switching model according to embodiment 2 of the present invention;
fig. 10 is a schematic diagram of an adaptive regional backup power automatic switching model according to embodiment 3 of the present invention;
fig. 11 is a schematic diagram of an adaptive regional backup power automatic switching model according to embodiment 4 of the present invention; wherein: 1, an area spare power automatic switching device A; 2, a spare power automatic switching device B in the area; 3, a spare power automatic switching device; 4 multiple interface device; 5, multiplexing equipment; 6 homodromous interface terminal; 7 protecting the machine room; 8, a communication machine room; 9, a transformer substation A; 10, substation B; 11 a light emitting unit; 12 an optical fiber; 13 a light receiving unit; 14 bus-bar switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
The schematic diagram of the high-voltage self-adaptive regional automatic bus transfer system and the communication mode of the two substations which are mutually standby for regional automatic bus transfer are shown in fig. 4-6.
A high-voltage self-adaptive regional automatic bus transfer system comprises a transformer substation A, a transformer substation B, a regional automatic bus transfer device and a main wiring of a power supply system:
the regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information of voltage and current of a transformer substation and switching quantity information of a switching position, and receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and performs logic judgment on 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 backup power automatic switching model is shown in a schematic diagram of a self-adaptive area backup power automatic switching model in figure 2, wherein TV L A1, TV L A2, TVMA1, TVMA2, TVMB1, TVMB2, TV L B1 and TV L B2 are secondary voltages after bus TV switching, are independent of breaker positions and only related to isolation switch positions, and TV L a1, TV L a2, TVMa1, TVMa2, TVMb1, TVMb2, TV L B1 and TV L B2 are line voltages.
For the voltage after the double-bus wiring voltage is switched is only related to the position of a disconnecting link and is not related to the position of a breaker, see fig. 3, when a circuit is connected to a bus I, a normally open auxiliary contact of the disconnecting link of the bus I is closed, a normally closed auxiliary contact of the bus II is closed, secondary voltage is accessed by a bus TV, and the circuit and the bus I are bound to form a power supply. When the circuit is connected to the second bus, the normally open auxiliary contact of the disconnecting link of the second bus is closed, the normally closed auxiliary contact of the first bus is closed, the secondary voltage is accessed by the TV of the second bus, and the circuit and the second bus are 'bundled' to be used as a power supply. From the above analysis, it can be seen that the switched voltage for realizing the link between the line and the bus is only related to the position of the disconnecting link and is not related to the position of the circuit breaker.
Preferably, the acquisition execution unit comprises a mutual inductor, 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 the A/D, and the electronic mutual inductor is directly connected with the DSP. The DSP selects TMS320C6711D of American TI company as a main computing core device; the core of the A/D selects a 6-channel synchronous sampling conversion device ADS8364 with high speed and low power consumption. When the DSP is connected with a conventional mutual inductor, synchronous data acquisition is carried out; when the DSP is connected with the electronic transformer, synchronous sampling data can be received in real time.
Preferably, the regional automatic spare power switching device further comprises a power supply liquid crystal display.
Preferably, the adaptive area spare power automatic switching model is provided with two power supplies, namely a main power supply and a spare power supply. The utility model discloses mainly be equipped with the automatic switch-on to the region of two transformer substation stations, consequently including two powers, two power one is main one is equipped with, and main power supply loses the electricity, jumps off main power supply, closes and is equipped with the power supply.
Preferably, the self-adaptive regional backup 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 breaker and two groups of isolating switches. By adopting the mode, the self-adaption of various wiring conditions can be realized.
The breaker and the bus are bound to form a power supply, the power supply breaker and the bus on a certain section of bus are regarded as a whole, and the bus voltage loss represents the power supply voltage loss. It should be noted that, during the judgment, the line voltage is also added as one of the criteria, and the simultaneous loss of the bus voltage and the line voltage indicates the loss of the power supply voltage.
Preferably, the circuit breaker and the bus form an integral power supply, and each circuit breaker is provided with an overhaul pressing plate. The method aims to solve the problem that a transformer substation can be accessed by a plurality of power supplies, the spare power automatic switching is only spare power automatic switching of two power supplies, and the rest power supplies do not participate in the logic judgment of the spare power automatic switching through the switching of the maintenance pressing plate.
The transformer substation is respectively provided with the regional automatic bus transfer equipment, so that the conventional automatic bus transfer function in the substation can be realized, and the function of mutual standby between two substations can also be realized.
Preferably, the regional automatic backup power switching device includes a light emitting unit 11 and a light receiving unit 13, and the two regional automatic backup power switching devices are directly connected through an optical fiber 12 to perform data transmission or information exchange of collected data, as shown in fig. 6 (a).
In another way of data transmission or information exchange, as shown in fig. 6 (b), the local automatic backup switching device includes an optical emitting unit 11 and an optical receiving unit 13, and the local automatic backup switching device is connected to the multiplexing device 5 having the co-directional interface terminal 6 through a multiplexing interface device 4 having the optical receiving unit 13 and the optical emitting unit 11 for data transmission.
Example 2
The dual-circuit group 1 is operated, and the standby area backup power automatic switching of the dual-circuit group 2 is realized, as shown in fig. 9:
charging conditions are as follows: 1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage; 2) when the double-circuit group 2 line voltage check control word is put in, the double-circuit group 2 line voltage satisfies the voltage condition (#2 line or #4 line voltage); or when the regional backup power automatic switch is put into use and the communication is normal, the pressure cut voltage of the opposite # 2 line is pressed, and the opposite # 2 line is in the closed position, or the pressure cut voltage of the opposite #4 line is pressed, and the opposite #4 line is in the closed position; 3) the switches of the double-circuit group 1 are in on-position, and the switches of the double-circuit group 2 are in off-position. And finishing charging after the charging time of the regional spare power automatic switching.
And discharge conditions, 1) when the double-loop group 2 line voltage check control word is switched on, the double-loop group 2 line voltage does not meet the voltage condition, and when the regional backup power supply is switched on, the opposite side # 2 line voltage is not met the voltage condition or the opposite side 2D L is in the branch position, and the opposite side #4 line voltage is not met the voltage condition or the opposite side 4D L is in the branch position, or the communication is abnormal, and the discharge is delayed by 15S.
2) A self-throwing device sends a closing command or the 2D L switch or the 4D L switch (non-maintenance) is closed;
3) when this device does not have the trip export: a hand-jump double-circuit group 1 switch (KKJ1 and KKJ3 both become 0); when the single-bus operation maintenance pressing plate is withdrawn, the bus-bar switch is manually tripped;
4) the locking spare power automatic switching is started; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-bus operation maintenance pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the second bus is started; when the lines 1 and 3 are positioned in the second bus, the first bus protection action is started;
5) TWJ abnormality of any one of the double-circuit group 1 switch or the double-circuit group 2 switch;
6) the double-circuit group 1 switch or the bus-coupled switch rejects jumping;
7) withdrawing the area for spare power automatic switching;
8) and the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
after charging is completed, if a double-circuit group 2 line voltage check control word is put in, the double-circuit group 2 line voltage meets a voltage condition (#2 line or #4 line has voltage), or when a regional automatic switch is put in and communication is normal, the side #2 line voltage has voltage and the side 2D L is in a combined position, or the side #4 line voltage has voltage and the side 4D L is in a combined position, 1) the double-circuit group 1 voltage and the double-circuit group 2 voltage are not voltage (the line voltages are both less than a non-voltage starting fixed value), the double-circuit group 1 has no current (I1 and I3), the double-circuit group 1 has no current in a separated position or in a combined position and has no voltage, starting is carried out by delaying TtT 1, jumping the double-circuit group 1 switches (1D L and 3D L), and the combined I bus and II bus actions trip on the switches needing combined switching, and the double-circuit group 1 switches are confirmed to be tripped, and the double-circuit group 2 voltage is both (the line voltage is less than a non-voltage closing fixed value), and the double-circuit group 2 line voltage is delayed by 1 and has no voltage.
2) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not work, if the bus-coupled switch is tripped illegally and the voltage of the double-circuit group 2 is not pressurized (the line voltage is smaller than a non-pressurized starting fixed value), the double-circuit group is started, the bus-coupled switch is tripped through a time delay Tt1, if the circuit 1 and the circuit 3 are located at the II bus, the pressing plate is tripped, the II bus is tripped, and if the circuit 1 and the circuit 3 are located at the II bus, the pressing plate is tripped, the I bus is tripped. And (4) confirming that the bus-bar switch is tripped open and the voltage of the double-circuit group 2 is not voltage (the line voltages are all smaller than the non-voltage closing fixed value), and delaying the switch of the double-circuit group 2 through Th 1.
3) The single-bus operation pressing plate is withdrawn, I bus protection action is carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, the double-circuit line group 1 has no current, the voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than a non-pressed starting fixed value), the double-circuit line group is started, the bus-connected switch is tripped through time delay Tt1, II bus actions are tripped in a combined mode when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, and I bus actions are tripped in a combined mode when the pressing plate of the circuit. And (4) confirming that the bus-bar switch is tripped open and the voltage of the double-circuit group 2 is not voltage (the line voltages are all smaller than the non-voltage closing fixed value), and delaying the switch of the double-circuit group 2 through Th 1.
Example 3
The double loop set 1 is standby and the double loop set 2 is operational, see fig. 10:
charging conditions are as follows:
1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage, when the voltage check control word of the double-circuit group 1 is put into use, the voltage of the double-circuit group 1 meets the voltage condition (#1 line or #3 line has voltage);
2) the switches of the double-circuit group 1 are all in split positions, and the switches of the double-circuit group 2 are in combined positions. And finishing charging after the spare power automatic switching charging time.
Discharge conditions:
1) when the voltage check control word of the double-circuit line group 1 is put into use, the voltage of the double-circuit line group 1 does not meet the voltage condition, and the discharge is delayed by 15S.
2) The automatic switching sends a switching-on command or any switch (non-maintenance) of the double-circuit line set 1 is switched on;
3) when this device does not have the trip export: a hand-jumping double-circuit group 2 switch; when the single-bus running pressing plate is withdrawn, the bus-bar switch is manually tripped;
4) the locking spare power automatic switching is started; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-mother operation pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the first bus is started; when the lines 1 and 3 are positioned on the second bus pressing plate, the protection action of the second bus is started;
5) the switch of the double-circuit group 1 or the switch of the double-circuit group 2 is abnormal;
6) the double-circuit group 2 switch or the bus-coupled switch rejects jumping;
7) setting a control word or enabling a soft pressing plate to exit the area spare power automatic switching mode;
8) when the remote automatic casting is put into and the communication is normal, a 'opposite side blocking remote automatic casting' signal is received.
9) And the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
when the charging is completed, the dual loop group 1 line voltage check control word is put in and the dual loop group 1 line voltage satisfies the voltage condition (#1 line or #3 line voltage):
1) the voltage switching voltage of the double-circuit line set 1 and the voltage switching voltage of the double-circuit line set 2 are both non-voltage (the line voltages are both smaller than a non-voltage starting fixed value), when a remote backup power automatic switching device is switched in, a connection jump bus switch command sent from the opposite side is received, and then a connection jump I bus and a connection jump II bus act.
2) The double-circuit group 1 voltage switching voltage and the double-circuit group 2 voltage switching voltage are both non-voltage (the line voltages are both smaller than a non-voltage starting fixed value), the double-circuit group 2 line is non-current, and in a separate position or a combined position and the line is non-voltage, the double-circuit group 2 switch (2D L and 4D L) is started, the double-circuit group 2 switch (2D L and 4D L) is jumped through time delay Tt2 (when the remote backup power automatic switching is switched in, if a remote automatic switching signal of opposite side starting is received within the time Tt2, the double-circuit group I bus and the double-circuit II bus are simultaneously jumped, the double-circuit group 2 switch is confirmed to be jumped open (if the remote automatic switching signal of opposite side starting is received, whether the double-circuit group 2 switch is jumped open or not is not judged), and the.
3) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not work, if the bus-coupled switch is in a surreptitious mode and the voltage of the double-circuit group 1 is not pressurized (the line voltages are both smaller than a non-pressurized starting fixed value), the bus-coupled switch is started, the bus-coupled switch is jumped through a time delay Tt2, if the circuit 1 and the circuit 3 are located on the II bus pressing plate to be withdrawn, the I bus is jumped in a united mode, and if the circuit 1 and the circuit 3 are located on the II bus, the II bus is jumped in a united. And (4) confirming that the bus-bar switch is tripped open and the voltage of the voltage switching voltage of the double-circuit group 1 is not voltage (the line voltages are all smaller than a non-voltage switching-on fixed value), and delaying to switch on the double-circuit group 1 switch through Th 2.
4) The single-bus operation pressing plate is withdrawn, II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or I bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, 2 circuits of the double-circuit line group have no current, 1 voltage switching voltage of the double-circuit line group has no voltage (the line voltage is smaller than a non-voltage starting fixed value), the double-circuit line group is started, the bus connection switch is tripped through time delay Tt2, I bus actions are tripped in a combined mode when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, and II bus actions are tripped in a combined mode when the pressing plate of the. And (4) confirming that the bus-bar switch is tripped open and the voltage of the voltage switching voltage of the double-circuit group 1 is not voltage (the line voltages are all smaller than a non-voltage switching-on fixed value), and delaying to switch on the double-circuit group 1 switch through Th 2.
Example 4
The station is closed and the opposite station is opened, as shown in figure 11:
charging conditions are as follows: 1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage; 2) the switch of the double-circuit group 1 is in the closed position, the switch of the double-circuit group 2 is in the closed position, and when the single-bus running pressing plate exits, the bus-coupled switch is in the closed position; when the single-bus running pressing plate is put in, the position of the bus coupler switch is not judged.
And finishing charging after the spare power automatic switching charging time.
Discharge conditions: 1) the switches of the double-circuit group 2 are all in separated positions; 2) when this device does not have the trip export: a hand-jumping double-circuit group 1 switch; when the single-bus running pressing plate is withdrawn, the bus-bar switch is manually tripped;
3) the locking spare power automatic switching is started or the remote spare power automatic switching is withdrawn; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-mother operation pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the second bus is started; when the lines 1 and 3 are positioned in the second bus pressing plate, the first bus protection action is started;
4) the double-circuit group 1 is abnormal in switch;
5) the double-circuit group 1 switch or the bus-coupled switch rejects jumping;
6) setting a control word or enabling a soft pressing plate to exit from the automatic switching mode 6;
7) and the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
1) when charging is completed, the double-circuit group 1 voltage switching voltage and the double-circuit group 2 voltage switching voltage are both no voltage (the line voltages are both smaller than a non-voltage starting fixed value), the double-circuit group 1 is no current (I1 and I3 are both no current), the double-circuit group 1 is in a separating position or a combining position and the line is no voltage, starting is performed, the double-circuit group 1 switch (1D L and 3D L) is tripped through time delay Tt6, the I bus and the II bus are simultaneously tripped in a linked mode, a linked tripping command is sent to an opposite station, the double-circuit group 1 switch is determined to be tripped, and a remote self-throwing signal is sent to the opposite side after the two groups of double-circuit voltage switching voltages are both no voltage (the line voltages are both smaller than the non-voltage switching.
2) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not act, if the bus-coupled switch is subjected to stealing tripping and the voltage of the double-circuit group 2 is not pressurized (the line voltage is smaller than a non-pressurized starting fixed value), the starting is carried out, the bus-coupled switch is tripped through a time delay Tt6, if the circuit 1 and the circuit 3 are positioned in the II bus, the pressing plate is withdrawn, the circuit II bus is tripped, if the circuit 1 and the circuit 3 are positioned in the II bus, the circuit I bus is tripped, and meanwhile, a bus tripping command is sent to the opposite station. And after the bus tie switch is determined to be tripped open and the voltage of the double-circuit group 2 is no voltage (the line voltage is less than the no-voltage switching-on fixed value), a remote self-throwing signal for starting the opposite side is sent.
3) The single-bus operation pressing plate is withdrawn, I bus protection action is carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, the double-circuit line group 1 has no current, the double-circuit line group 2 has no voltage (the line voltage is smaller than a non-voltage starting fixed value), the double-circuit line group is started, the bus-bus connection switch is tripped through time delay Tt6, II bus actions are in linkage tripping if the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, I bus actions are in linkage tripping if the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, and a linkage. And after the bus tie switch is determined to be tripped open and the voltage of the double-circuit group 2 is no voltage (the line voltage is less than the no-voltage switching-on fixed value), a remote self-throwing signal for starting the opposite side is sent.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a regional automatic transfer system that prepares oneself of high pressure self-adaptation, includes transformer substation A, transformer substation B, regional automatic transfer device and power supply system owner wiring, its characterized in that:
the regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information of voltage and current of a transformer substation and switching quantity information of a switching position, and receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and performs logic judgment on 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.
2. The system according to claim 1, wherein the collection execution unit comprises a transformer, 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 the A/D, and the electronic mutual inductor is directly connected with the DSP.
3. The system according to claim 1, wherein the local automatic backup power switching device further comprises a power supply liquid crystal display.
4. The system according to claim 1, wherein the adaptive area automatic backup power switching model has two power sources, a main power source and a backup power source.
5. The system according to claim 4, wherein the adaptive regional automatic backup power switching model adopts a double-bus connection 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.
6. The system according to claim 5, wherein the circuit breakers and the bus bar form an integral power supply, and each circuit breaker is provided with a service pressure plate.
7. The high-voltage self-adaptive regional automatic backup power switching system according to claim 1, wherein a substation is respectively provided with the regional automatic backup power switching devices, so that a conventional automatic backup power switching function in a station can be realized, and a function that two stations are mutually standby can also be realized.
8. The system according to claim 1, wherein the local automatic backup power switching device comprises an optical transmitting unit and an optical receiving unit, and the two local automatic backup power switching devices are directly connected through an optical fiber for data transmission.
9. The system according to claim 1, wherein the local automatic backup power switching device comprises a light emitting and light receiving device, and the local automatic backup power switching device is connected with a terminal multiplexing device with a homodromous interface through a multiplexing interface device having a light receiving unit and a light emitting unit for data transmission.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110601350A (en) * | 2019-09-23 | 2019-12-20 | 云南电网有限责任公司曲靖供电局 | High-voltage self-adaptive area spare power automatic switching system and spare power automatic switching control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110601350A (en) * | 2019-09-23 | 2019-12-20 | 云南电网有限责任公司曲靖供电局 | High-voltage self-adaptive area spare power automatic switching system and spare power automatic switching control method thereof |
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