CN113363946A - One-plant two-network power isolation optimization method - Google Patents
One-plant two-network power isolation optimization method Download PDFInfo
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- CN113363946A CN113363946A CN202110356207.2A CN202110356207A CN113363946A CN 113363946 A CN113363946 A CN 113363946A CN 202110356207 A CN202110356207 A CN 202110356207A CN 113363946 A CN113363946 A CN 113363946A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/266—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving switching on a spare supply
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention provides a method for optimizing the isolation of two power supplies in one plant, which completely isolates all connected power supplies of two power grids, ensures the safe operation of the power grids and the safe and stable operation of two machines, reduces the operation safety risk caused by complicated operation, reduces the accident processing time in the accident processing and prevents the accident from expanding.
Description
Technical Field
The invention relates to the technical field of power grid equipment, in particular to a method for optimizing isolation of two power supplies in one plant.
Background
At present, under the operation mode of 'one plant and two networks', during the operation period of any unit parallel network, two power grids and two unit public system power supplies of the plant need to be isolated, the two power grids are closed by the two power grid isolation points due to slight errors in setting and operation, the safe operation of the two power grids is seriously threatened, meanwhile, the unit parallel network operation is extremely complex, the operation of the generator parallel network is complex from the adjustment of the operation mode of the electrical system, the setting and operation of the isolation points, the 'island' self-contained service power operation of the generator and the grid-connected operation electrical switching operation, the safety risk is too large, and serious power grid accidents and serious equipment loss are caused by slight errors.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the technical problem to be solved by the invention is to overcome the defect of complex grid-connected operation and high safety risk in the prior art, so that the method for optimizing the isolation of the two-network power supply in one plant is provided.
In order to solve the technical problems, the invention provides the following technical scheme: a method for optimizing isolation of power supplies of two networks in one plant comprises
Setting two power grid isolation points of a #2 high-rise plant transformer and a #0 standby plant transformer system;
two power grid isolation points of 6kV station transformer system
Setting a 0.4kV distribution room isolation point of a main power house;
and setting 0.4kV water replenishing section, water purifying section and desulfurizing section isolation points.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: and under the two power grid isolation points of the #2 high-rise plant transformer and the #0 starting and standby plant transformer system, operating each section of standby power switch to a separation position.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: and under the condition of two power grid isolation points of the 6kV station transformer system, operating the high-voltage side switch of each transformer to be cold for standby.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: and under the isolation position of the main power house 0.4kV distribution room, the switches of all equipment and the standby power supply of the distribution room are operated to be in cold standby.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: and under the isolation point positions of the water replenishing section, the water purifying section and the desulfurization section of 0.4kV, the switches of the equipment and the standby power supply are operated to be cold for standby.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: under the condition of no standby power supply, the operation mode of the 6kV station power system comprises the following steps: the working 1A, 1B sections and the 6kV public 01A section are supplied by a #1 high-rise transformer; working power switches 6101 and 6102 of 1A and 1B sections of 6kV work run, and standby power switches 6103 and 6104 are in cold standby; the 6kV public 01A-section working power switch 6106 runs, the standby power switch 6011 is in cold standby, and the fast switching device exits.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: the method also comprises that 6kV working sections 2A and 2B and a 6kV public section 01B are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in cold standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in a cold standby state, and the quick-cutting device exits.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: when the standby power supply is recovered, the operation mode of the 6kV auxiliary power system comprises the following steps: the 6kV working 1A and 1B sections and the 6kV public 01A section are supplied by a #1 high-rise substation; working power switches 6101 and 6102 of sections 1A and 1B of 6kV work run, and standby power switches 6103 and 6104 are in hot standby; a6 kV public 01A-section working power switch 6106 runs, a standby power switch 6011 is in hot standby, and a fast switching device is put into operation.
As a preferred scheme of the method for optimizing the isolation of the two networks of the power supply of one plant, the method comprises the following steps: the 6kV working 2A and 2B sections and the 6kV public 01B section are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in hot standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in hot standby, and the quick switching device is put into operation.
The invention has the beneficial effects that: according to the method for optimizing the isolation of the power supplies of the two power grids in one plant, all the connected power supplies of the two power grids are completely isolated, the safe operation of the power grids and the safe and stable operation of the two power grids are ensured, the operation safety risk caused by complicated operation is reduced, the accident handling time is reduced in the accident handling, and the accident expansion is prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic wiring diagram of 220kV and 110kV systems;
FIG. 2 is a schematic diagram of the wiring of the 6KV system of the #1 machine;
FIG. 3 is a schematic diagram of a wiring diagram of a #2 machine 6KV system;
fig. 4 is a schematic wiring diagram of a 0.4kv factory system of a #1 machine;
FIG. 5 is a schematic diagram of wiring of a 0.4kV factory system of a #2 machine;
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Example 1
The embodiment provides a method for optimizing power isolation of two networks in one plant, which comprises the following steps
Setting two power grid isolation points of a #2 high-rise plant transformer and a #0 standby plant transformer system;
two power grid isolation points of 6kV station transformer system
Setting a 0.4kV distribution room isolation point of a main power house;
and setting 0.4kV water replenishing section, water purifying section and desulfurizing section isolation points.
And under the two power grid isolation points of the #2 high-rise substation and the #0 standby substation system, each section of standby power switch is operated to the separation position.
And under the condition of two power grid isolation points of the 6kV station transformer system, operating the high-voltage side switch of each transformer to be cold for standby.
And under the isolation position of the main power house 0.4kV distribution room, the switches of all equipment and the standby power supply of the distribution room are operated to be in cold standby.
And under the isolation point positions of the water replenishing section, the water purifying section and the desulfurization section of 0.4kV, the switches of the equipment and the standby power supply are operated to be cold for standby.
Under the condition of no standby power supply, the operation mode of the 6kV station power system comprises the following steps: the working 1A, 1B sections and the 6kV public 01A section are supplied by a #1 high-rise transformer; working power switches 6101 and 6102 of 1A and 1B sections of 6kV work run, and standby power switches 6103 and 6104 are in cold standby; the 6kV public 01A-section working power switch 6106 runs, the standby power switch 6011 is in cold standby, and the fast switching device exits.
Meanwhile, the section 2A and the section 2B of 6kV work and the section 01B of 6kV public are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in cold standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in a cold standby state, and the quick-cutting device exits.
When the standby power supply is recovered, the operation mode of the 6kV auxiliary power system comprises the following steps: the 6kV working 1A and 1B sections and the 6kV public 01A section are supplied by a #1 high-rise substation; working power switches 6101 and 6102 of sections 1A and 1B of 6kV work run, and standby power switches 6103 and 6104 are in hot standby; a6 kV public 01A-section working power switch 6106 runs, a standby power switch 6011 is in hot standby, and a fast switching device is put into operation.
The 6kV working 2A and 2B sections and the 6kV public 01B section are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in hot standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in hot standby, and the quick switching device is put into operation.
Specifically, the operation and setting of each isolation point are shown in the following table;
table 1:
example 2
In this embodiment, an anti-accident scheme is proposed by taking two units of a grand dragon branch company as an example when they are incorporated into a xiang network operation:
unit operation mode
The #1 and #2 machine sets are merged into a Hunan network.
(II) 220kV operation mode:
the 220kV TungDai and II loops are connected with the power grid in Hunan, and the #1 unit is connected with the power grid in Hunan through a 220kV TungDai loop line, a large dragon transformer 220kV bus, a large shaking line and a large top line. The #2 unit is connected with a Hunan power grid through a 220kV TunDai II circuit, a large dragon transformer 220kV bus, a large shaking line and a large top line. The 220kV inner bridge switch 210 operates in a loop closing manner.
(III) the operation mode of the 6kV station power system is as follows:
1.6kV working 1A, 1B and 6kV public 01A sections are supplied by a #1 high-rise substation. Namely: working power switches 6101 and 6102 of 6kV working 1A and 1B sections operate, and standby power switches 6103 and 6104 are in cold standby (isolation points); the 6kV public 01A-stage working power switch 6106 runs, the standby power switch 6011 is in cold standby (isolation point), and the fast switching device exits.
2.6kV working 2A, 2B and 6kV public 01B sections are supplied by a #2 high-rise substation. Namely: the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in cold standby (isolation points); the 6kV public 01B-stage working power switch 6206 operates, the standby power switch 6012 is in cold standby (isolation point), and the fast switching device exits.
(IV) the operation mode of the 0.4kV system:
1A/1B and 2A/2B sections of 1.0.4kV work are operated in a segmented mode.
The 2.0.4kV electric precipitation 1A/1B and 2A/2B sections are operated in a segmented mode.
3.0.4kV dehumidifying 1A/1B and 2A/2B section segmented operation
The 4.0.4kV water purification A/B section, the 0.4kV water supplement A/B section, the 0.4kV desulfurization A/B section and the 0.4kV public A/B section are operated in a subsection mode, and the contact switch is in a cold standby mode (an isolation point).
The 5.0.4kV water changing A/B section, the 0.4kV ash removing A/B section and the 0.4kV coal conveying A/B section are respectively communicated with the #2 water changing section, the #2 ash removing section and the #2 coal conveying section, and switches on the high-pressure side of the #1 water changing section, the #1 ash removing section and the #1 coal conveying section are in cold standby (isolation points).
The 6.0.4kV lighting A/B section and the 0.4kV overhaul section are communicated and operated by a #2 lighting, and a #1 lighting high-voltage side switch and an overhaul high-voltage side switch are in cold standby (isolation points); the life change is powered by the #2 life change switch, and the #1 life change switch is in cold standby (isolation point).
7. Appearance air compressor machine operation mode: A/C operation, B/D standby or B/D operation, A/C standby.
8. The operation mode of the industrial water pump is as follows: A/C operation, B/D standby or B/D operation, A/C standby.
9. The operation mode of the slurry circulating pump of the desulfurization absorption tower is as follows: because the desulfurization absorption tower slurry circulating pump A, B, C does not have a speed reducer oil pump, when desulfurization 0.4kV security I and II sections lose power, the desulfurization absorption tower slurry circulating pump A, B, C cannot trip, and according to the fact that the desulfurization absorption tower A slurry circulating pump and the desulfurization absorption tower B, C slurry circulating pump are respectively arranged on 6kV working A/B sections, the operation mode of the desulfurization system slurry circulating pump must keep the desulfurization absorption tower slurry circulating pump A, B or the desulfurization absorption tower slurry circulating pump A, C to operate, and after the desulfurization 0.4kV security I and II sections lose power, the desulfurization absorption tower slurry circulating pump cannot be caused to jump completely, so that boiler MFT is caused.
The technical measures for preventing accidents during the operation of the #1 and #2 machine set parallel network are as follows:
in order to ensure the reliable operation of Hunan networks of #1 and #2 units, the following measures are adopted:
1. and (4) removing the furnace trip protection of the #1 and #2 units (reserving a water level high-III value trip), and exiting the 6kV fast switching device of the #1 and #2 units.
2. The incoming line power switch and the standby power switches 6101, 6102, 6103 and 6104 electronic anti-error devices of the 6kV working 1A/1B section are released; releasing the incoming line power switch and the standby power switches 6201, 6202, 6203 and 6204 electronic anti-misoperation devices of the 6kV working 2A/2B section; the electronic error prevention device of the 6kV public 01A/01B section standby power switches 6011, 6012 is released; the electronic anti-misoperation devices of #1 coal conveying change, #1 lighting change, #1 ash removal change and #1 water changing high pressure side switches 6SM1, 6ZM1, 6CH1 and 6HS1 are released; the remote/local conversion switch electronic anti-misoperation device of all auxiliary switches on the 6kV working 1A/1B section bus and the 6kV working 2A/2B section bus is released.
3. Before the shift of each shift with a long value, the shift station can require each professional to clearly report the maintenance working condition, the operation mode, the defect condition and the like, and arrange personnel arrangement and emergency measures during the shift.
4. The electric operating personnel strictly monitors and adjusts to ensure that the 6kV bus voltage of the #1 and #2 unit is 6.3 +/-0.05 kV, and the switching error jump caused by overcurrent due to too low voltage is avoided.
5. The electric operating personnel patrol and check the security power supply (a diesel generator, a storage battery, a UPS and a direct current system) once every 2 hours, the universal meter is used for measuring the voltages of the positive electrode and the negative electrode of the direct current system to earth on site every shift when the shift is in work, and if the abnormal reporting value is long, the maintenance treatment is associated. Ensure the security power supply to be in a good standby state and make a record.
6. And (3) the electric operators perform manual starting trial run tests of the #1 and #2 diesel generators every Monday and morning shift, and if the abnormal report value is long, the maintenance is associated. The #1 and #2 diesel engines are ensured to be in a good standby state and are recorded.
7. When the furnace blowing conditions are met due to the fact that maintenance, outage and power failure of equipment such as a powder making system and desulfurization equipment affect, thermal workers must be immediately contacted to forcibly set the conditions, and the contents of safety measures of work tickets are added, so that delay of blowing time after fire extinguishment of a boiler is avoided.
8. The load reducing rate of the unit is less than or equal to 3MW/min, the pressure reduction must be controlled in advance, the powder feeding amount cannot be reduced rapidly to a large extent, and oil must be firstly put into the unit to stabilize the fuel when the load is reduced in case of abnormal conditions.
9. The average powder level of the powder bin is ensured to be more than 3.5 meters and the single side is more than 3.0 meters. When the coal quality is poor and the normal powder level operation is influenced by the maintenance of a pulverizing system, the frequency of the dynamic separator should be immediately reduced when the average powder level of the powder bin is reduced to 3m, but in order to ensure the stable combustion, the frequency of the dynamic separator is required to be more than or equal to 29Hz in principle.
10. The boiler profession should master the water supply mode of the water seal at the bottom of the boiler at any time to ensure that the water seal at the bottom of the boiler is not cut off. The inspection hole door of the slag well is fastened and closed, and the inspection door without the fastener is found to immediately inform the inspection and the repair.
11. The boiler specialty patrols and examines at every turn and must overhaul manhole door cross arm, bolt condition inspection to the slag well, and the cross arm can not appear the crackle, and the bolt is reliable (at least two), and there is not the hidden danger of suddenly opening in the manhole door.
12. Boiler specialty must keep the combustor spout clean at any time, clear away spout coking in time. The coke hole door is tightly closed at any time, the locking device is complete, and otherwise, the maintenance is timely informed.
13. Controlling the rotating speed of the powder feeder: the rotating speed of the powder feeder with the layer number of B, C being less than or equal to 500r/min is less than or equal to 800r/min, the situation that the main steam pressure is changed rapidly due to rapid and uneven powder caused by the fact that the rotating speed of the powder feeder with the layer number of B, C is increased infinitely and the situation that the primary air pipes of a plurality of powder feeders blow simultaneously occurs.
14. Before the coal is transferred to a shift, the coal must be linked with combustion, transportation, environmental protection and chemistry, the operation mode of the shift is mastered, the blending condition of the coal as fired, equipment defects and the like are known, the heat value of the coal as fired is not less than 19MJ/kg, the Vad is not less than 8.5 percent, and the stability of the coal quality is ensured.
15. Before the operation of the pulverizing system is stopped, the coal can not be completely cut off and the pulverized coal can be completely cut off when the coal feeding quantity is gradually reduced to be below 20 t/h. So as not to cause combustion and large fluctuations in drum water level.
16. Any auxiliary machine is started and stopped, the value must be proved to be long, and the main operation is good, so that the accident prediction party can operate.
17. The steam turbine major tries to turn on the #1 and #2 large/small direct-current oil pumps and the top shaft oil pump, the turning gear motor and the standby sealing oil alternating-current and direct-current oil pumps every three morning shifts, the abnormal condition is found, the reported value is long immediately, the maintenance is informed to carry out first-aid repair, and the accident that the oil of the steam turbine is cut off and the bearing bush is burnt after the service power disappears is avoided.
18. The steam turbine profession insists on carrying out emergency protector oil injection test and oil filling activity test, high and medium pressure main valve activity test, medium pressure adjusting valve activity test, valve tightness test and the like according to the regulation requirements, so as to ensure that various overspeed protection is normally put into operation, and prevent overspeed accidents from occurring after the unit is unloaded.
19. The maintenance part arranges the thermal engineering personnel on duty at night, other on-duty personnel are communicated smoothly, and the maintenance part can arrive at the site in time to assist in accident handling in case of emergency.
20. The oil pressure of furnace front oil systems of the #1 and #2 furnaces is ensured to be 3.5-3.7 MPa.
21. The long value should strengthen the connection with the central dispatching and the local dispatching to master the operation condition of the power grid at any time.
22.#1, #2 units put into zero-power cutter protection.
23. The circulating water system runs in an expansion unit mode (#1 and 2 circulating water main pipe communication doors are opened by 5 percent respectively).
24. The inspection of the electric feed pump is listed as a key inspection item, the monitoring of each parameter of the electric pump on a CRT is enhanced, the in-situ inspection quality is improved, the abnormal condition is found, the value is reported immediately, and the maintenance is connected, so that the electric feed pump is ensured to be in a reliable standby state at any time.
25. Before the unit is integrated into a Xiang network, a high-voltage bypass interlocking switch and a low-voltage bypass interlocking switch are required to be checked to be in a cutting position (the high-voltage bypass and the low-voltage bypass are strictly forbidden to be put into the Xiang network, and the electric pump interlocking is released).
26. The oxygen-discharging manual door of the deaerator is opened at one side (the oxygen-discharging electric door is opened after the service power is lost and tripped, so that the deaerator is prevented from being in overpressure).
According to the method for optimizing the isolation of the power supplies of the two power grids in one plant, all the connected power supplies of the two power grids are completely isolated, the safe operation of the power grids and the safe and stable operation of the two power grids are ensured, the operation safety risk caused by complicated operation is reduced, the accident handling time is reduced in the accident handling, and the accident expansion is prevented.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A method for optimizing isolation of power supplies of two networks in one plant is characterized by comprising the following steps: comprises that
Setting two power grid isolation points of a #2 high-rise plant transformer and a #0 standby plant transformer system;
two power grid isolation points of 6kV station transformer system
Setting a 0.4kV distribution room isolation point of a main power house;
and setting 0.4kV water replenishing section, water purifying section and desulfurizing section isolation points.
2. The one-plant two-network power isolation optimization method according to claim 1, wherein: and under the two power grid isolation points of the #2 high-rise plant transformer and the #0 starting and standby plant transformer system, operating each section of standby power switch to a separation position.
3. The one-plant two-network power isolation optimization method according to claim 1, wherein: and under the condition of two power grid isolation points of the 6kV station transformer system, operating the high-voltage side switch of each transformer to be cold for standby.
4. The one-plant two-network power isolation optimization method according to claim 1, wherein: and under the isolation position of the main power house 0.4kV distribution room, the switches of all equipment and the standby power supply of the distribution room are operated to be in cold standby.
5. The one-plant two-network power isolation optimization method according to claim 1, wherein: and under the isolation point positions of the water replenishing section, the water purifying section and the desulfurization section of 0.4kV, the switches of the equipment and the standby power supply are operated to be cold for standby.
6. The one-plant two-network power isolation optimization method according to claim 3, wherein: under the condition of no standby power supply, the operation mode of the 6kV station power system comprises the following steps: the working 1A, 1B sections and the 6kV public 01A section are supplied by a #1 high-rise transformer; working power switches 6101 and 6102 of 1A and 1B sections of 6kV work run, and standby power switches 6103 and 6104 are in cold standby; the 6kV public 01A-section working power switch 6106 runs, the standby power switch 6011 is in cold standby, and the fast switching device exits.
7. The one-plant two-network power isolation optimization method according to claim 6, wherein: the method also comprises that 6kV working sections 2A and 2B and a 6kV public section 01B are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in cold standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in a cold standby state, and the quick-cutting device exits.
8. The one-plant two-network power isolation optimization method according to claim 3, wherein: when the standby power supply is recovered, the operation mode of the 6kV auxiliary power system comprises the following steps: the 6kV working 1A and 1B sections and the 6kV public 01A section are supplied by a #1 high-rise substation; working power switches 6101 and 6102 of sections 1A and 1B of 6kV work run, and standby power switches 6103 and 6104 are in hot standby; a6 kV public 01A-section working power switch 6106 runs, a standby power switch 6011 is in hot standby, and a fast switching device is put into operation.
9. The one-plant two-network power isolation optimization method according to claim 8, wherein: the 6kV working 2A and 2B sections and the 6kV public 01B section are supplied by a #2 high-rise substation; the working power switches 6201 and 6202 of the 6kV working sections 2A and 2B operate, and the standby power switches 6203 and 6204 are in hot standby; the 6kV public 01B section working power switch 6206 operates, the standby power switch 6012 is in hot standby, and the quick switching device is put into operation.
Priority Applications (1)
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