CN117335388A - Power outage method for 10kV station power bus of hydropower station - Google Patents
Power outage method for 10kV station power bus of hydropower station Download PDFInfo
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- CN117335388A CN117335388A CN202311192092.3A CN202311192092A CN117335388A CN 117335388 A CN117335388 A CN 117335388A CN 202311192092 A CN202311192092 A CN 202311192092A CN 117335388 A CN117335388 A CN 117335388A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a power failure method for a 10kV power plant bus, which can realize that the 10kV power plant bus is in one-key sequential control and has the functions of fixing operation items, automatically distinguishing equipment states, intelligently checking false interlocking, starting operation steps by one key, automatically executing operation processes sequentially and the like. By adopting the 10kV operation intelligent control flow of the monitoring system, the problems of complicated steps, scattered and coordinated equipment, more communication and coordination and complex operation process of the existing power failure operation ticket are avoided, the risk of misoperation can be reduced, the working efficiency is improved, the intelligent level of the power station is improved, and the safety of power production is ensured.
Description
Technical Field
The invention relates to the field of hydropower plant control, in particular to a 10kV power bus power failure method for a hydropower plant.
Background
The 10kV switching operation of the hydropower plant generally has the characteristic of fixability of operation logic, and because of more 10kV and 0.4kV buses of the power system of the plant, the load of equipment is dispersed, and the requirements on the physical strength and the capacity of operators and guardians are high.
At present, remote monitoring and on-site operator cooperation operation are needed for switching off the 10kV bus of the station, a remote monitoring system enables the corresponding station power load switch to be disconnected, the on-site operator needs to check the 10kV switch action and the BZT action condition of the 400V power supply point at the lower stage (or a group of operators cooperate to check the 400V equipment state) for a plurality of times, the steps of power failure operation tickets are complicated, station power equipment is distributed, communication coordination is multiple, the operation process is complex, the working face is easy to mix up, the station power switching operation work efficiency is low, and the station power resources are occupied.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a 10kV station power bus power failure method for a hydropower station, so that the problems of complex operation process, complicated operation ticket steps, low working efficiency and the like in the prior art can be expected to be solved.
In order to solve the technical problems, one embodiment of the present invention adopts the following technical scheme:
a10 kV station power bus power failure method for a hydropower station comprises the following steps:
s1: the monitoring system checks the power failure pre-condition, if yes, the next step is executed, and if not, the execution is stopped;
s2: exiting the 10kV 1M bus BZT;
s3: the important load flow is automatically switched, and the uninterruptible load is automatically transferred to the main power supply of the uninterruptible 10kV bus;
s4: breaking the 10kV load and the contact switch, and exiting if the 10kV state of the 10kV switch of the contact line connected with the 10kV bus is abnormal;
s5: breaking the main inlet wire switch;
s6: and 1M, power failure is carried out, and the process is ended.
According to a further technical scheme, the step S3 is specifically that,
starting self-checking of the uninterruptible power load state:
if the unit is stopped, skipping automatic switching, and carrying out the next step;
if the unit is not stopped, completing work of completing the load without power failure by other loads, skipping automatic switching, and performing the next step;
and if the unit is not stopped, the load is mainly supplied by 10kV of the power-off bus, and the power supply is switched to 10kV of the load of the non-power-off bus.
In a further technical scheme, the step S4 is specifically that,
if the 10kV load switch is normally opened, the flow is normal, and the flow proceeds to the next step;
if the 10kV load switch fails to break due to unknown faults or the state is unknown, the power failure flow is warned, the flow process is not influenced, and the flow proceeds to the next step;
if the 10kV switch state of the connecting tie line of the 10kV bus is abnormal, the 10kV bus power failure can not confirm that an obvious disconnection point exists between the 10kV bus and the system, manual inspection and intervention are needed at the moment, and the automatic power failure flow is needed to be withdrawn.
The further technical scheme is that the following steps are carried out after the step S3, and the running state of the 400V power supply point at the lower stage of the 10kV load switch is confirmed;
if the power of the section I bus of the lower 400V power supply point is lost or in an overhaul state, the flow is not affected, and the flow enters the next step;
if the lower-stage 400V power supply point II section bus is in a power failure or overhauling state, the pre-condition is considered, the starting condition of the power failure flow is not met, and the power failure of the station service bus flow is not applicable;
if the lower 400V power supply point is operated by the section II with the section I, the flow is not affected, and the flow enters the next step;
if the lower 400V power supply point is operated by the I section with the II section, the power failure of all loads of the 400V power supply point I, II is considered in the pre-condition, the starting condition of the power failure process is not met, and the power failure of the station service bus process is not applicable.
The further technical scheme is that the power failure pre-condition check comprises:
condition 1: self-checking the states of the power failure bus and the associated tie line BZT;
condition 2: the power failure bus and the associated tie line run normally without faults;
condition 3: the remote operation conditions of the 1M main power supply switch, the 1M 10kV load switches and the 1M related interconnection switch are met and the protection is not operated;
condition 4: the important uninterrupted power load condition is met;
condition 5: the remote control conditions of the equipment contained in the local control unit layer of the other areas are met.
Compared with the prior art, the invention has at least the following beneficial effects: the 10kV factory power-on sequential control has the functions of fixing operation items, automatically judging equipment states, intelligently checking error-preventing interlocking, starting operation steps by one key, automatically executing operation processes sequentially and the like. By adopting the 10kV operation intelligent control flow of the monitoring system, the misoperation risk can be reduced, the working efficiency is improved, the intelligent level of the power station is improved, and the power production safety is ensured.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
A10 kV station power bus power failure method for a hydropower station comprises the following steps:
s1: checking a pre-condition of power failure of the monitoring system, wherein the pre-condition is met and a 10kV 1M power failure command is started, executing the next step, and stopping executing if any condition is not met;
condition 1: and (3) self-checking the states of the power failure bus and the associated tie line BZT:
namely: the 10kV 1M BZT remote operation condition is met, and the 1M BZT is in a full-automatic mode or a semi-automatic mode or an exit mode;
the 10kV 7M BZT remote operation condition is met, the 7M BZT is fully or semi-automatic, and 9M is pressed or 9M is operated with 7M or 7M is powered off;
condition 2: the power failure bus and the associated tie line run normally without faults;
namely: the 1M bus has no fault and the protection device does not act;
the 7M bus is fault-free and the protection device is not operated and each tie switch is fault-free;
condition 3:1M main power supply switch, 1M 10kV load switches respectively, and remote operation conditions of 1M related contact switches are met and non-action is protected
Namely: the remote operation conditions of the 1M incoming line switch and the interconnection switch are met, the 1M main incoming line is powered, the main incoming line switch is fault-free, the interconnection switches on the 1M are protected from being operated, and the 1M is pressed;
the remote operation conditions of the 7M incoming line switch and the interconnection switch are met, the 1M belt is 7M and the 7M1 is met or the 7M belt is 9M or 7M is pressureless; in this embodiment, 7M is an off-plant 10kV busbar, and 1M is used for supplying power in a normal mode, which can be regarded as 1M load, and if other power plant power outage busbars are operated normally, a single busbar is operated, which can be ignored.
The remote operation condition of the 10kV 1M load cabinet is met, all the load cabinet states of 1M are switched on or all the load cabinets of 1M are switched off, or all the load cabinet states of 1M are not in the working position, and the 10kV load cabinet pump mode is switched off; (if the load of the deep well pump of 10kV exists, the pump needs to be ensured to be in a shutdown state before power failure)
Condition 4: the important uninterrupted power load condition meets
The operation condition of the subordinate 0.4kV power supply point of the 10kV power failure bus 10kV load cabinet is met, and the important load unit self-power consumption consideration, namely the non-power-losing section II of the 0.4kV unit self-power consumption is taken as a precondition.
Condition 5: the remote control conditions of the equipment contained in the local control unit layers of the other areas are satisfied
LCU21A/B/C remote operation conditions are met; (1M 10kV power outage in this factory involves a public LCU)
LCU19 remote operating conditions are met. (1M 10kV power outage in this factory involves the dam LCU)
S2: exiting the 10kV 1M bus BZT;
s3: the important load flow is automatically switched, the uninterruptible load is automatically transferred to the main power supply of the uninterruptible 10kV bus, and the process power failure is ensured not to affect the normal operation unit.
The step S3 is specifically to start the self-checking of the uninterruptible power load state:
if the unit is stopped, skipping automatic switching, and carrying out the next step;
if the unit is not stopped, completing work of completing the load without power failure by other loads, skipping automatic switching, and performing the next step;
and if the unit is not stopped, the load is mainly supplied by 10kV of the power-off bus, and the power supply is switched to 10kV of the load of the non-power-off bus.
In this embodiment, taking an important load unit technology water supply pump as an example:
flow automatic starting technology water supply pump state self-checking:
if the unit operates, the 400V unit operates from the power consumption power supply point in a segmented mode, the unit technology water supply 1# pump operates (namely 10kV load main power supply of a power failure bus), the next step of the flow is carried out, and the flow is automatically switched to the unit technology water supply 2# pump operation (namely to 10kV load power supply of a non-power failure bus), so that the operation of the unit technology water supply system is not affected.
If the unit is stopped, the unit technology water supply pump is not required to run, the flow is satisfied, the automatic pump reversing is skipped, and the next step is carried out.
If the unit operates, the unit technology supplies water for operating the No. 2 pump, the process is satisfied irrespective of the load of the power failure bus, the automatic pump reversing is skipped, and the next step is performed.
If the unit is operated, the water supply is started by other communication valves and the No. 1 pump is not operated, the flow is satisfied and the automatic pump reversing is skipped to enter the next step regardless of the load of the power failure bus.
The method mainly considers that the load is mainly supplied by the power failure bus load before the power failure of the uninterruptible load, and the load transfer is carried out before the power failure, so that the influence on the normal operation of the unit caused by the fact that the important load is not started to stop the operation of standby equipment is avoided. The other important load working steps are consistent with the technical water supply pump of the load unit.
S4: breaking the 10kV load and the contact switch, and exiting if the 10kV state of the 10kV switch of the contact line connected with the 10kV bus is abnormal;
the step S4 is specifically that,
if the 10kV load switch is normally opened, the flow is normal, and the flow proceeds to the next step;
if the 10kV load switch fails to break due to unknown faults or the state is unknown, the power failure flow is warned, the flow process is not influenced, and the flow proceeds to the next step;
if the 10kV switch state of the connecting tie line of the 10kV bus is abnormal, the 10kV bus power failure can not confirm that an obvious disconnection point exists between the 10kV bus and the system, manual inspection and intervention are needed at the moment, and the automatic power failure flow is needed to be withdrawn.
After the steps are executed, confirming the running state of the 400V power supply point of the lower stage of the 10kV load switch;
if the power of the section I bus of the lower 400V power supply point is lost or in an overhaul state, the flow is not affected, and the flow enters the next step;
if the lower-stage 400V power supply point II section bus is in a power failure or overhauling state, the pre-condition is considered, the starting condition of the power failure flow is not met, and the power failure of the station service bus flow is not applicable;
if the lower 400V power supply point is operated by the section II with the section I, the flow is not affected, and the flow enters the next step;
if the lower 400V power supply point is operated by the I section with the II section, the power failure of all loads of the 400V power supply point I, II is considered in the pre-condition, the starting condition of the power failure process is not met, and the power failure of the station service bus process is not applicable.
S5: breaking the main inlet switch, and self-checking the state of the main inlet switch and the voltage of a 10kV bus;
s6: and 1M, power failure is carried out, and the process is ended.
Although the invention has been described herein with reference to illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.
Claims (5)
1. A power outage method for 10kV station service buses of a hydropower station is characterized by comprising the following steps:
s1: the monitoring system checks the power failure pre-condition, if yes, the next step is executed, and if not, the execution is stopped;
s2: exiting the 10kV 1M bus BZT;
s3: the important load flow is automatically switched, and the uninterruptible load is automatically transferred to the main power supply of the uninterruptible 10kV bus;
s4: breaking the 10kV load and the interconnection switch, and exiting if the 10kV state of the 10kV switch of the interconnection line connected with the 10kV bus is abnormal;
s5: breaking the main inlet wire switch;
s6: and 1M, power failure is carried out, and the process is ended.
2. The method for power failure of 10kV factory electric bus of hydropower plant according to claim 1, wherein the step S3 is specifically,
starting self-checking of the uninterruptible power load state:
if the unit is stopped, skipping automatic switching, and carrying out the next step;
if the unit is not stopped, completing work of completing the load without power failure by other loads, skipping automatic switching, and performing the next step;
and if the unit is not stopped, the load is mainly supplied by 10kV of the power-off bus, and the power supply is switched to 10kV of the load of the non-power-off bus.
3. The method for power failure of 10kV factory electric bus of hydropower plant according to claim 1, wherein the step S4 is specifically,
if the 10kV load switch is normally opened, the flow is normal, and the flow proceeds to the next step;
if the 10kV load switch fails to break due to unknown faults or the state is unknown, the power failure flow is warned, the flow process is not influenced, and the flow proceeds to the next step;
if the 10kV switch state of the connecting wire connected with the 10kV bus is abnormal, the automatic power failure flow needs to be exited.
4. The method for power failure of a 10kV factory power bus of a hydropower plant according to claim 1, wherein after the step S4 is completed, the following steps are carried out to confirm the running state of a 400V power supply point of a lower stage of a 10kV load switch;
if the power of the section I bus of the lower 400V power supply point is lost or in an overhaul state, the flow is not affected, and the flow enters the next step;
if the lower-stage 400V power supply point II section bus is in a power failure or overhauling state, the pre-condition is considered, the starting condition of the power failure flow is not met, and the power failure of the station service bus flow is not applicable;
if the lower 400V power supply point is operated by the section II with the section I, the flow is not affected, and the flow enters the next step;
if the lower 400V power supply point is operated by the I section with the II section, the power failure of all loads of the 400V power supply point I, II is considered in the pre-condition, the starting condition of the power failure process is not met, and the power failure of the station service bus process is not applicable.
5. The method for power outage of a 10kV plant power bus of a hydropower plant according to claim 1, wherein the power outage pre-condition check comprises:
condition 1: self-checking the states of the power failure bus and the associated tie line BZT;
condition 2: the power failure bus and the associated tie line run normally without faults;
condition 3: the remote operation conditions of the 1M main power supply switch, the 1M 10kV load switches and the 1M related interconnection switch are met and the protection is not operated;
condition 4: the important uninterrupted power load condition is met;
condition 5: the remote control conditions of the equipment contained in the local control unit layer of the other areas are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192092.3A CN117335388A (en) | 2023-09-14 | 2023-09-14 | Power outage method for 10kV station power bus of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192092.3A CN117335388A (en) | 2023-09-14 | 2023-09-14 | Power outage method for 10kV station power bus of hydropower station |
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| Publication Number | Publication Date |
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| CN117335388A true CN117335388A (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311192092.3A Pending CN117335388A (en) | 2023-09-14 | 2023-09-14 | Power outage method for 10kV station power bus of hydropower station |
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| CN (1) | CN117335388A (en) |
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- 2023-09-14 CN CN202311192092.3A patent/CN117335388A/en active Pending
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