CN112290669A - Electrical system for combined black start of 9E and 9F gas turbine and working method thereof - Google Patents
Electrical system for combined black start of 9E and 9F gas turbine and working method thereof Download PDFInfo
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- CN112290669A CN112290669A CN202011282183.2A CN202011282183A CN112290669A CN 112290669 A CN112290669 A CN 112290669A CN 202011282183 A CN202011282183 A CN 202011282183A CN 112290669 A CN112290669 A CN 112290669A
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The invention discloses an electrical system for joint black start of 9E and 9F gas turbines and a working method thereof, and the electrical system comprises a 9E gas turbine black start power supply unit, a first 9E gas turbine high-voltage plant transformer, a first 9E gas turbine high-voltage plant power unit, a first 9F gas turbine main wiring unit, a second 9E gas turbine high-voltage plant transformer, a second 9E gas turbine high-voltage plant power unit, a second 9F gas turbine main wiring unit, a 9E gas turbine starting standby transformer, a 9E gas turbine high-voltage standby section black start power supply incoming line switch and a 9E gas turbine high-voltage standby section standby power supply incoming line switch The price is high.
Description
Technical Field
The invention belongs to the field of electrical design, and relates to an electrical system for combined black start of a 9E and 9F combustion engine and a working method thereof.
Background
The 9E and 9F combustion engines are located at the load center, have large capacity and high starting speed, and are preferable to be black start power supply points. The key point of the combustion engine becoming a black start power supply is to configure a reasonable black start power supply, and the black start power supply usually adopts a diesel generator with quick start and also selects energy storage equipment. The self-starting load of the combustion engine is large due to the existence of the compressor, the 9E combustion engine is about 2000kW, and the 9F combustion engine is about 9000 kW. High-pressure diesel generators and energy storage devices of this capacity are difficult to manufacture and expensive.
The design specification stipulates that more than 200MW generator sets need to be provided with emergency safety power supplies to ensure that important loads are not powered off when the whole plant is powered off, so that the safety of equipment in the plant is ensured, and diesel generators which are started quickly are usually selected as the emergency safety power supplies.
Therefore, an electrical system and a starting method for the combined black start of the 9E and 9F combustion engines are needed, wherein the electrical system and the starting method have both reliability and economy, and can realize the combined black start of the 9E and 9F combustion engines.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electrical system for the combined black start of a 9E combustion engine and a 9F combustion engine and a working method thereof, the system and the working method thereof can realize the combined black start of the 9E combustion engine and the 9F combustion engine, can realize the miniaturization of a black start diesel generator, and solve the problems of difficult manufacture and high price of a black start power supply of the 9F combustion engine.
In order to achieve the purpose, the 9E and 9F gas turbine combined black start electrical system comprises a 9E gas turbine black start power supply unit, a first 9E gas turbine high-voltage plant transformer, a first 9E gas turbine high-voltage station service unit, a first 9F gas turbine main wiring unit, a second 9E gas turbine high-voltage station transformer, a second 9E gas turbine high-voltage station service unit, a second 9F gas turbine main wiring unit, a 9E gas turbine starting standby transformer, a 9E gas turbine high-voltage standby section black start power supply incoming line switch and a 9E gas turbine high-voltage standby section starting standby power supply incoming line switch;
the 9E combustion engine black start power supply unit comprises a No. 1 diesel generator, a No. 2 diesel generator, a black start diesel generator and a black start 380V section, the system comprises a No. 1 diesel generator, a No. 2 diesel generator and a black start diesel generator, wherein the No. 1 diesel generator, the No. 2 diesel generator and the black start diesel generator are connected with a black start 380V section, the black start 380V section is connected with a 9E gas turbine high-voltage standby section through a 9E gas turbine high-voltage standby section black start power incoming switch, a first 9F gas turbine main wiring unit is connected with a first 9E gas turbine high-voltage station transformer and a 9E gas turbine high-voltage standby section through a first 9F gas turbine high-voltage station service unit and a first 9E gas turbine high-voltage station service unit, a second 9F gas turbine main wiring unit is connected with the 9E gas turbine high-voltage standby section and a second 9E gas turbine high-voltage station transformer through a second 9F gas turbine high-voltage station service unit and a second 9E gas turbine high-voltage station transformer, and the first 9F;
the 9E combustion engine starting-standby transformer is connected with the 9E combustion engine high-voltage standby section through a 9E combustion engine high-voltage standby section starting-standby transformer power supply incoming line switch.
The 9E combustion engine black start power supply unit further comprises a No. 1 diesel generator outlet circuit breaker, a No. 1 diesel generator outlet 380V section, a first 9F combustion engine accident safety section diesel engine sending inlet wire switch, a first 9F combustion engine accident safety section, a No. 2 diesel generator outlet circuit breaker, a No. 2 diesel generator outlet 380V section, a second 9F combustion engine accident safety section diesel engine sending inlet wire switch, a second 9F combustion engine accident safety section, a black start diesel generator outlet circuit breaker, a black start 380V section first inlet wire switch, a black start 380V section second inlet wire switch, a black start step-down voltage side switch and a black start change;
the No. 1 diesel generator is connected with the No. 1 diesel generator outlet 380V section through a No. 1 diesel generator outlet breaker, the No. 1 diesel generator outlet 380V section is connected with the first 9F gas turbine accident security section through a first 9F gas turbine accident security section diesel engine inlet switch, and the No. 1 diesel generator outlet 380V section is connected with the black start 380V section through a black start 380V section first inlet switch; the No. 2 diesel generator is connected with the No. 2 diesel generator outlet 380V section through a No. 2 diesel generator outlet breaker, the No. 2 diesel generator outlet 380V section is connected with the second 9F gas turbine accident safety section through a second 9F gas turbine accident safety section diesel engine inlet switch, and the No. 2 diesel generator outlet 380V section is connected with the black start 380V section through a black start 380V section second inlet switch; the black start diesel generator is connected with the 380V section of the black start through a black start diesel generator outlet circuit breaker; the black start 380V section is connected with the 9E gas turbine high-voltage standby section through a black start low-voltage side switch, a black start change and a 9E gas turbine high-voltage standby section black start power supply inlet switch.
The first 9E gas turbine high-voltage station service unit comprises a first 9E gas turbine high-voltage station service bus, a first 9E gas turbine high-voltage station service bus working power supply incoming line switch and a first 9E gas turbine high-voltage station service bus standby power supply incoming line switch;
the second 9E combustion engine high-voltage station service unit comprises a second 9E combustion engine high-voltage station service bus, a second 9E combustion engine high-voltage station service bus working power supply incoming line switch and a second 9E combustion engine high-voltage station service bus standby power supply incoming line switch;
the first 9E combustion engine high-voltage plant is connected with the first 9E combustion engine high-voltage plant bus through a first 9E combustion engine high-voltage plant bus working power supply incoming switch; the 9E combustion engine high-voltage standby section is connected with a first 9E combustion engine high-voltage station bus through a first 9E combustion engine high-voltage station bus standby power supply incoming line switch; the second 9E combustion engine high-voltage plant is connected with the second 9E combustion engine high-voltage plant bus through a second 9E combustion engine high-voltage plant bus working power supply incoming switch; the 9E combustion engine high-voltage standby section is connected with a second 9E combustion engine high-voltage station bus through a second 9E combustion engine high-voltage station bus standby power supply incoming line switch;
the first 9F gas turbine high-voltage station service unit is connected with the first 9E gas turbine high-voltage station service bus, and the second 9F gas turbine high-voltage station service unit is connected with the second 9E gas turbine high-voltage station service bus.
The first 9F gas turbine high-voltage station service unit comprises a first 9F gas turbine high-voltage station service bus, a first 9F gas turbine high-voltage station service bus working power supply incoming line switch, a first 9F gas turbine high-voltage station service bus standby power supply incoming line switch and an interconnection switch I;
the second 9F gas turbine high-voltage station service unit comprises a second 9F gas turbine high-voltage station service bus, a second 9F gas turbine high-voltage station service bus working power supply incoming line switch, a second 9F gas turbine high-voltage station service bus standby power supply incoming line switch and an interconnection switch II;
the first 9F gas turbine main wiring unit is connected with a first 9F gas turbine high-voltage station bus through a first 9F gas turbine high-voltage station bus working power supply incoming line switch; the first 9E combustion engine high-voltage station service unit is connected with a first 9F combustion engine high-voltage station service bus through a first interconnection switch;
the second 9F gas turbine main wiring unit is connected with a second 9F gas turbine high-voltage station bus through a second 9F gas turbine high-voltage station bus working power supply incoming switch; the second 9E combustion engine high-voltage station service unit is connected with a second 9F combustion engine high-voltage station service bus through a second interconnection switch;
the second 9F gas turbine high-voltage station bus is connected with the first 9F gas turbine high-voltage station bus through a second 9F gas turbine high-voltage station bus standby power supply incoming line switch and a first 9F gas turbine high-voltage station bus standby power supply incoming line switch.
The first 9F gas turbine main wiring unit comprises a first 9F gas turbine generator, a first 9F gas turbine outlet circuit breaker, a first 9F gas turbine main transformer high-voltage side circuit breaker, a first 9F gas turbine high-voltage bus and a first 9F gas turbine high-voltage transformer;
the second 9F gas turbine main wiring unit comprises a second 9F gas turbine generator, a second 9F gas turbine outlet circuit breaker, a second 9F gas turbine main transformer high-voltage side circuit breaker, a second 9F gas turbine high-voltage bus and a second 9F gas turbine high-voltage transformer;
the first 9F gas turbine generator is connected with the low-voltage side of a first 9F gas turbine main transformer through a first 9F gas turbine outlet circuit breaker, a first 9F gas turbine high-voltage bus is connected with the high-voltage side of the first 9F gas turbine main transformer through a first 9F gas turbine main transformer high-voltage side circuit breaker, and the low-voltage side of the first 9F gas turbine main transformer is connected with a first 9F gas turbine high-voltage power plant unit through a first 9F gas turbine high-voltage power plant transformer;
the second 9F gas turbine generator is connected with the low-voltage side of a second 9F gas turbine main transformer through a second 9F gas turbine outlet circuit breaker, a second 9F gas turbine high-voltage bus is connected with the high-voltage side of the second 9F gas turbine main transformer through a second 9F gas turbine main transformer high-voltage side circuit breaker, and the low-voltage side of the second 9F gas turbine main transformer is connected with a second 9F gas turbine high-voltage power station unit through a second 9F gas turbine high-voltage power station transformer.
The working method of the electrical system with the combined black start of the 9E and 9F combustion engines comprises the following steps:
1) the black start diesel generator, the No. 1 diesel generator and the No. 2 diesel generator are ready;
2) starting a black start diesel generator;
3) starting the No. 1 diesel generator and the No. 2 diesel generator, and preparing a 9E combustion engine black start power supply unit;
4)9E black start of the gas turbine;
5) a first 9F gas turbine black start;
6) a second 9F gas turbine black start;
7) the No. 1 diesel generator and the No. 2 diesel generator are recovered to a hot standby state.
The specific operation of the step 1) is as follows:
11) putting the black start diesel generator in a hot standby state;
12) the No. 1 diesel generator is in a hot standby state;
13) the No. 2 diesel generator is in a hot standby state.
The specific operation of the step 2) is as follows:
21) the method comprises the following steps that when a power grid collapses, the 9E unit loses power from the whole plant, a 9E gas turbine starting-standby transformer, a first 9E gas turbine high-voltage plant bus, a second 9E gas turbine high-voltage plant bus, a first 9E gas turbine high-voltage plant transformer and a second 9E gas turbine high-voltage plant transformer are all in a power loss state, and a black-start diesel generator receives a 9E unit black-start instruction;
22) the black-start diesel generator is started after receiving a black-start instruction of the 9E unit, the rotating speed of the black-start diesel generator is increased to a rated rotating speed, the black-start diesel generator is excited, after the black-start diesel generator is successfully built, a breaker at the outlet of the black-start diesel generator is switched on, and a 380V section of the black-start diesel generator is electrified;
23) closing a black start low-voltage side switch, and enabling the black start to be electrified; closing the inlet switch of the black starting power supply of the high-voltage standby section of the 9E gas turbine, and recovering power supply of the high-voltage standby section of the 9E gas turbine;
24) after the No. 1 diesel generator and the No. 2 diesel generator are connected with the 380V section of black start in a grid mode, the 9E combustion engine black start power supply is ready.
The specific operation of the step 3) is as follows:
31) the 9F gas turbine loses power from the whole plant;
32) after detecting that the first 9F gas turbine accident security section and the second 9F gas turbine accident security section lose power, the No. 1 diesel generator and the No. 2 diesel generator automatically start, when the No. 1 diesel generator and the No. 2 diesel generator reach rated rotating speed, excitation is automatically put in, the No. 1 diesel generator and the No. 2 diesel generator successfully build voltage, the No. 1 diesel generator outlet circuit breaker and the No. 2 diesel generator outlet circuit breaker are switched on, and the black start 380V section is electrified;
33) the first 9F gas turbine accident security section firewood sending inlet wire switch and the second 9F gas turbine accident security section firewood sending inlet wire switch are switched on, and the first 9F gas turbine accident security section and the second 9F gas turbine accident security section recover power supply;
34) the loads on the first 9F gas turbine accident security section and the second 9F gas turbine accident security section recover power supply;
35) the 380V section of the outlet of the No. 1 diesel generator is connected with the 380V section of the black start through a first inlet wire switch of the 380V section of the black start; and the 380V section of the outlet of the No. 2 diesel generator is connected with the 380V section of the black start through a second incoming switch of the 380V section of the black start.
10. The electrical system and the starting method for the combined black start of the 9E and 9F combustion engine according to claim 6, wherein the specific operation of the step 4) is as follows:
41) closing a first 9E gas turbine high-voltage station bus standby power supply incoming line switch, and providing a black start power supply for the first 9E gas turbine high-voltage station bus through a 9E gas turbine high-voltage standby section; the first 9E combustion engine is started by using a black start power supply provided by a high-voltage standby section of the 9E combustion engine, after the first 9E combustion engine finishes speed increase and purging, the first 9E combustion engine is fixed at 3000 revolutions per minute, the voltage of a generator of the first 9E combustion engine is built to a rated voltage, and the first 9E combustion engine high-voltage station transformer recovers power supply;
42) the inlet wire switch of the standby bus power supply of the first 9E gas turbine high-voltage plant is switched off, the inlet wire switch of the working bus power supply of the first 9E gas turbine high-voltage plant is switched on, and the first 9E gas turbine high-voltage plant bus is restored to be powered by the first 9E gas turbine high-voltage plant;
43) disconnecting a high-voltage standby section black-start power supply incoming switch and a black-start low-voltage side switch of the 9E gas turbine, and switching from black start to power failure;
44) disconnecting a first incoming switch at a 380V section of the black start, disconnecting a second incoming switch at a 380V section of the black start, disconnecting an outlet circuit breaker of the black start diesel generator, and cutting off power at the 380V section of the black start; manually stopping the black-start diesel generator, and recovering the hot standby state of the black-start diesel generator after the stop is successful;
the specific operation process of the step 5) is as follows:
51) closing the first interconnection switch, and providing a black start power supply for the first 9F combustion engine by the first 9E combustion engine high-voltage station bus through the first interconnection switch;
52) the first 9F gas turbine is started by using a first 9E gas turbine high-voltage plant bus (after the provided black start power supply is started and the first 9F gas turbine finishes speed rise and purging, the set constant speed of the first 9F gas turbine is 3000 rpm, the voltage of a first 9F gas turbine generator is built to a rated voltage, a first 9F gas turbine generator outlet circuit breaker is switched on, and the first 9F gas turbine high-voltage plant is restored to supply power;
53) disconnecting the first interconnection switch of the first 9F gas turbine high-voltage station bus, closing the incoming line switch of the first 9F gas turbine high-voltage station bus working power supply, and recovering the first 9F gas turbine high-voltage station bus from power supply of the first 9F gas turbine high-voltage station;
54) manually stopping the No. 1 diesel generator, and recovering the No. 1 diesel generator to be in a hot standby state after the stop is successful;
the specific operation of step 6) is:
61) closing a first 9F gas turbine high-voltage station bus standby power supply incoming line switch and a second 9F gas turbine high-voltage station bus standby power supply incoming line switch, wherein the first 9F gas turbine high-voltage station bus provides a black start power supply for the second 9F gas turbine high-voltage station bus;
62) the second 9F gas turbine is started by using a black start power supply provided by a first 9F gas turbine high-voltage plant bus, after the second 9F gas turbine finishes speed increase and purging, the set constant speed of the second 9F gas turbine is 3000 rpm, the generator of the second 9F gas turbine builds up voltage to rated voltage, the breaker at the outlet of the generator of the second 9F gas turbine is switched on, and the second 9F gas turbine high-voltage plant becomes to recover power supply;
63) disconnecting the inlet wire switch of the standby power supply of the second 9F gas turbine high-voltage station bus, closing the inlet wire switch of the working power supply of the second 9F gas turbine high-voltage station bus, and recovering the second 9F gas turbine high-voltage station bus to be powered by the second 9F gas turbine high-voltage station;
64) and manually stopping the No. 2 diesel generator, and recovering the No. 2 diesel generator in a hot standby state after the stop is successful.
The invention has the following beneficial effects:
when the 9E and 9F gas turbine combined black start electrical system and the working method thereof are specifically operated, the No. 1 diesel generator set, the No. 2 diesel generator set and the black start diesel generator are connected in parallel to form a black start power supply of the 9E gas turbine, so that the black start diesel generator is miniaturized, and the manufacturing difficulty and the manufacturing cost are reduced; meanwhile, the 9E unit is successfully started in a black mode to provide a black start power supply for the 9F unit, and the problem that the black start power supply of the 9F gas turbine is difficult to realize is solved; the No. 1 diesel generator and the No. 2 diesel generator are used as an accident safety power supply and a black start power supply of the 9F combustion engine, so that the utilization rate of the diesel generator is improved, the problems that the black start power supply of the 9F combustion engine is difficult to manufacture and expensive are solved, the combined black start of the 9E combustion engine and the 9F combustion engine is realized, and the combined black start system can be widely applied to the design of an electrical system of a large combustion engine.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the present invention.
Wherein, 1 is a black start power supply unit, 2 is a first 9E gas turbine high-voltage plant transformer, 3 is a first 9E gas turbine high-voltage plant power supply unit, 4 is a first 9F gas turbine high-voltage plant power supply unit, 5 is a first 9F gas turbine main wiring unit, 6 is a second 9E gas turbine high-voltage plant transformer, 7 is a second 9E gas turbine high-voltage plant power supply unit black start 380V bus, 8 is a second 9F gas turbine high-voltage plant power supply unit, 9 is a second 9F gas turbine main wiring unit, 10 is a 9E gas turbine start-up transformer, 11 is a 9E gas turbine high-voltage standby section, 12 is a 9E gas turbine high-voltage standby section black start power supply inlet switch, 13 is a 9E gas turbine high-voltage standby section start-up transformer power supply inlet switch, 14 is a No. 1 diesel generator, 15 is a No. 1 diesel generator outlet circuit breaker, 16 is a No. 1 diesel generator outlet 380V section, 17 is a first 9F gas turbine accident safety section diesel engine inlet switch, 18 is a first 9F gas turbine accident security section, 19 is a No. 2 diesel engine generator, 20 is a No. 2 diesel engine generator outlet breaker, 21 is a No. 2 diesel engine generator outlet 380V section, 22 is a second 9F gas turbine accident security section diesel engine sending inlet switch, 23 is a second 9F gas turbine accident security section, 24 is a black-start diesel engine generator, 25 is a black-start diesel engine generator outlet breaker, 26 is a black-start 380V section first inlet switch, 27 is a black-start 380V section second inlet switch, 28 is a black-start 380V section, 29 is a black-start low-voltage side switch, 30 is a black-start variable, 31 is a first 9E gas turbine high-voltage plant bus working power inlet switch, 32 is a first 9E gas turbine high-voltage plant bus working power inlet switch, 33 is a first 9E gas turbine high-voltage plant bus standby power inlet switch, 34 is a first 9F gas turbine high-voltage plant bus, 35 is a first 9F gas turbine high-voltage plant working power inlet switch, 36 is an interconnection switch I, 37 is a first 9F gas turbine high-voltage plant bus standby power supply incoming line switch, 38 is a first 9F gas turbine high-plant transformer, 39 is a first 9F gas turbine main transformer, 40 is a first 9F gas turbine main transformer high-voltage side circuit breaker, 41 is a first 9F gas turbine high-voltage bus, 42 is a first 9F gas turbine generator, 43 is a first 9F gas turbine outlet circuit breaker, 44 is a second 9E gas turbine high-voltage plant bus, 45 is a second 9E gas turbine high-voltage plant bus working power supply incoming line switch, 46 is a second 9E gas turbine high-voltage plant bus standby power supply incoming line switch, 47 is a second 9F gas turbine high-voltage plant bus, 48 is a second 9F gas turbine high-voltage plant bus working power supply incoming line switch, 49 is an interconnection switch II, 50 is a second 9F gas turbine high-voltage plant bus standby power supply incoming line switch, 51 is a second 9F gas turbine high-plant transformer, 52 is a second 9F gas turbine high-voltage plant bus standby power supply incoming line switch, A second 9F combustion engine main transformer high-voltage side circuit breaker 53, a second 9F combustion engine high-voltage bus 54, a second 9F combustion engine generator 55 and a second 9F combustion engine outlet circuit breaker 56.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the 9E and 9F gas turbine combined black start electrical system of the present invention includes a 9E gas turbine black start power supply unit 1, a first 9E gas turbine high-voltage plant transformer 2, a first 9E gas turbine high-voltage plant service unit 3, a first 9F gas turbine high-voltage plant service unit 4, a first 9F gas turbine main wiring unit 5, a second 9E gas turbine high-voltage plant transformer 6, a second 9E gas turbine high-voltage plant service unit 7, a second 9F gas turbine high-voltage plant service unit 8, a second 9F gas turbine main wiring unit 9, a 9E gas turbine startup transformer 10, a 9E gas turbine high-voltage standby section 11, a 9E gas turbine high-voltage standby section black start power incoming line switch 12, and a 9E gas turbine high-voltage standby section startup power incoming line switch 13. The No. 1 diesel generator 14, the No. 2 diesel generator 19 and the black start diesel generator 24 are connected in parallel to provide a black start power supply for the 9E combustion engine; the first 9F gas turbine and the second 9F gas turbine adopt a hand-in-hand wiring mode for high-voltage service power, and are mutually standby power supplies; the first 9E combustion engine high-voltage station bus provides a black-start power supply for the first 9F combustion engine through a first interconnection switch 36; and the second 9E combustion engine high-voltage station bus provides a black-start power supply for the second 9F combustion engine through the second interconnection switch 49.
The 9E combustion engine black start power supply unit 1 comprises a No. 1 diesel generator 14, a No. 1 diesel generator outlet circuit breaker 15, a No. 1 diesel generator outlet 380V section 16, a first 9F combustion engine accident security section diesel engine sending inlet switch 17, a first 9F combustion engine accident security section 18, a No. 2 diesel generator 19, a No. 2 diesel generator outlet circuit breaker 20, a No. 2 diesel generator outlet 380V section 21, a second 9F combustion engine accident security section diesel engine sending inlet switch 22, a second 9F combustion engine accident security section 23, a black start diesel generator 24, a black start diesel generator outlet circuit breaker 25, a black start 380V section first inlet switch 26, a black start 380V section second inlet switch 27, a black start 380V section 28, a black start low-voltage side switch 29 and a black start transformer 30, wherein the No. 1 diesel generator 14 supplies power for the No. 1 diesel generator outlet 380V section 16 through the No. 1 diesel generator outlet circuit breaker 15, the 380V section 16 of the No. 1 diesel generator outlet supplies power to the first 9F gas turbine accident security section 18 through the first 9F gas turbine accident security section diesel engine inlet switch 17, and the 380V section 16 of the No. 1 diesel generator outlet supplies power to the 380V section 28 of the black start through the first 380V section black start inlet switch 26; the No. 2 diesel generator 19 supplies power to the No. 2 diesel generator outlet 380V section 21 through the No. 2 diesel generator outlet circuit breaker 20, the No. 2 diesel generator outlet 380V section 21 supplies power to the second 9F gas turbine accident safety section 23 through the second 9F gas turbine accident safety section diesel sending inlet switch 22, and the No. 2 diesel generator outlet 380V section 21 supplies power to the black start 380V section 28 through the black start 380V section second inlet switch 27; the black start diesel generator 24 supplies power to the black start 380V section 28 through the black start diesel generator outlet circuit breaker 25; the black start 380V section 28 is connected with a black start transformer 30 through a black start transformer low-voltage side switch 29, and the black start transformer high-voltage side supplies power to a 9E gas turbine high-voltage standby section 11 through a high-voltage standby section black start power incoming line switch 12.
The first 9E gas turbine high-voltage station service unit 3 comprises a first 9E gas turbine high-voltage station service bus 31, a first 9E gas turbine high-voltage station service bus working power supply incoming line switch 32 and a first 9E gas turbine high-voltage station service bus standby power supply incoming line switch 33, wherein the first 9E gas turbine high-voltage station transformer 2 provides working power supply for the first 9E gas turbine high-voltage station service bus 31 through the first 9E gas turbine high-voltage station service bus working power supply incoming line switch 32; the 9E combustion engine high-voltage standby section 11 provides standby power for the first 9E combustion engine high-voltage station service bus 31 through the first 9E combustion engine high-voltage station service bus standby power incoming line switch 33.
The second 9E gas turbine high-voltage station service unit 7 comprises a second 9E gas turbine high-voltage station service bus 44, a second 9E gas turbine high-voltage station service bus working power supply incoming line switch 45 and a second 9E gas turbine high-voltage station service bus standby power supply incoming line switch 46, wherein the second 9E gas turbine high-voltage station transformer 6 provides working power supply for the second 9E gas turbine high-voltage station service bus 44 through the second 9E gas turbine high-voltage station service bus working power supply incoming line switch 45; the 9E combustion engine high voltage standby section 11 provides standby power for the second 9E combustion engine high voltage station service bus 44 through the second 9E combustion engine high voltage station service bus standby power incoming line switch 46.
The first 9F gas turbine high-voltage station service unit 4 comprises a first 9F gas turbine high-voltage station service bus 34, a first 9F gas turbine high-voltage station service bus working power supply incoming line switch 35, a first 9F gas turbine high-voltage station service bus standby power supply incoming line switch 37 and a first interconnection switch 36, and the first 9F gas turbine high-voltage station transformer 38 provides working power supply for the first 9F gas turbine high-voltage station service bus 34 through the first 9F gas turbine high-voltage station service bus working power supply incoming line switch 35; the second 9F combustion engine high-voltage station bus 47 provides standby power for the first 9F combustion engine high-voltage station bus 34 through the first 9F combustion engine high-voltage station bus standby power incoming switch 37; the first 9E combustion engine high-voltage plant bus 31 provides black-start power for the first 9F combustion engine high-voltage plant bus 34 through the first interconnection switch 36.
The second 9F gas turbine high-voltage station service unit 8 comprises a second 9F gas turbine high-voltage station service bus 47, a second 9F gas turbine high-voltage station service bus working power supply incoming switch 48, a second 9F gas turbine high-voltage station service bus standby power supply incoming switch 50 and an interconnection switch II 49, and the second 9F gas turbine high-voltage station transformer 51 provides working power supply for the second 9F gas turbine high-voltage station service bus 47 through the second 9F gas turbine high-voltage station service bus working power supply incoming switch 48; the first 9F combustion engine high-voltage station bus 34 provides standby power for the second 9F combustion engine high-voltage station bus 47 through a second 9F combustion engine high-voltage station bus standby power incoming switch 50; the second 9E combustion engine high-voltage plant bus 44 provides black-start power for a second 9F combustion engine high-voltage plant bus 47 through a second interconnection switch 49.
The first 9F gas turbine main wiring unit 5 comprises a first 9F gas turbine generator 42, a first 9F gas turbine outlet circuit breaker 43, a first 9F gas turbine main transformer 39, a first 9F gas turbine main transformer high-voltage side circuit breaker 40, a first 9F gas turbine high-voltage bus 41 and a first 9F gas turbine high-voltage transformer 38, wherein the first 9F gas turbine generator 42, the first 9F gas turbine outlet circuit breaker 43, the first 9F gas turbine main transformer 39, the first 9F gas turbine main transformer high-voltage side circuit breaker 40 and the first 9F gas turbine high-voltage bus 41 are sequentially connected, and the first 9F gas turbine high-voltage transformer 38 is connected to the low-voltage side of the first 9F gas turbine main transformer 39 in a T mode.
The second 9F gas turbine main connection unit 9 comprises a second 9F gas turbine generator 55, a second 9F gas turbine outlet circuit breaker 56, a second 9F gas turbine main transformer 52, a second 9F gas turbine main transformer high-voltage side circuit breaker 53, a second 9F gas turbine high-voltage bus 54 and a second 9F gas turbine high-voltage transformer 51, wherein the second 9F gas turbine generator 55, the second 9F gas turbine outlet circuit breaker 56, the second 9F gas turbine main transformer 52, the second 9F gas turbine main transformer high-voltage side circuit breaker 53 and the second 9F gas turbine high-voltage bus 54 are sequentially connected, and the second 9F gas turbine high-voltage transformer 51 is connected to the low-voltage side of the second 9F gas turbine main transformer 52 in a T mode.
Referring to fig. 2, the working method of the electric system with combined black start of the 9E and 9F combustion engines according to the present invention comprises the following steps:
1) the black start diesel generator 24, the No. 1 diesel generator 14 and the No. 2 diesel generator 19 are ready;
2) starting the black start diesel generator 24;
3) starting the No. 1 diesel generator 14 and the No. 2 diesel generator 19, and preparing the 9E combustion engine black start power supply unit 1;
4)9E black start of the gas turbine;
5) a first 9F gas turbine black start;
6) a second 9F gas turbine black start;
7) the No. 1 diesel generator 14 and the No. 2 diesel generator 19 are restored to the hot standby state.
The specific operation of the step 1) is as follows:
11) the black start diesel generator 24 is in a hot standby state, namely the diesel generator has sufficient diesel, the storage battery is in a good state, the oil pressure of lubricating oil is normal, and the electronic equipment is in a good state;
12) the No. 1 diesel generator 14 is in a hot standby state, namely the diesel generator has sufficient diesel, a storage battery is in a good state, the oil pressure of lubricating oil is normal, and the state of electronic equipment is good;
13) the No. 2 diesel generator 19 is in a hot standby state, namely the diesel generator has sufficient diesel, a storage battery is in a good state, the oil pressure of lubricating oil is normal, and the state of electronic equipment is good.
The specific operation of the step 2) is as follows:
21) the method comprises the following steps that when a power grid collapses, the 9E unit loses power from the whole plant, a 9E gas turbine starting backup transformer 10, a first 9E gas turbine high-voltage plant bus 31, a second 9E gas turbine high-voltage plant bus 44, a first 9E gas turbine high-voltage plant transformer 2 and a second 9E gas turbine high-voltage plant transformer 6 are in a power loss state, and a black-start diesel generator 24 receives a 9E unit black-start instruction;
22) the black-start diesel generator 24 is started after receiving a black-start instruction of the 9E unit, the rotating speed of the black-start diesel generator 24 is increased to a rated rotating speed, the black-start diesel generator 24 is excited, after the black-start diesel generator 24 is successfully built, an outlet circuit breaker 25 of the black-start diesel generator is switched on, and a 380V section 28 of the black-start is electrified;
23) closing a black start low voltage side switch 29, and charging a black start low voltage side switch 30; closing the 9E gas turbine high-voltage standby section black starting power supply incoming line switch 12, and restoring power supply of the 9E gas turbine high-voltage standby section 11;
24) after the No. 1 diesel generator 14 and the No. 2 diesel generator 19 are connected with the black start 380V section 28 in a grid mode, the black start power supply of the 9E combustion engine is ready.
The specific operation of the step 3) is as follows:
31) the method comprises the following steps that the 9F gas turbines lose power from the whole plant, namely two 9F gas turbine high-voltage plant buses, a 9F gas turbine main transformer, a 9F gas turbine high-voltage plant transformer and a 9F gas turbine high-voltage plant bus are all lost power;
32) after the No. 1 diesel generator 14 and the No. 2 diesel generator 19 detect that the first 9F gas turbine accident security section 18 and the second 9F gas turbine accident security section 23 lose power, the automatic start is performed, when the No. 1 diesel generator 14 and the No. 2 diesel generator 19 reach rated rotating speeds, excitation is automatically put in, the No. 1 diesel generator 14 and the No. 2 diesel generator 19 build voltage successfully, the No. 1 diesel generator outlet circuit breaker 15 and the No. 2 diesel generator outlet circuit breaker 20 are switched on, and the black start 380V section 28 is charged;
33) the first 9F gas turbine accident security section firewood sending inlet wire switch 17 and the second 9F gas turbine accident security section firewood sending inlet wire switch 22 are switched on, and the first 9F gas turbine accident security section 18 and the second 9F gas turbine accident security section 23 recover power supply;
34) the loads on the first 9F gas turbine accident safety section 18 and the second 9F gas turbine accident safety section 23 are restored to supply power;
35) the 380V section 16 of the No. 1 diesel generator outlet is connected with the 380V section 28 of the black start through a first incoming line switch 26 of the 380V section of the black start; and the 380V section 21 of the No. 2 diesel generator outlet is connected with the 380V section 28 of the black start through a second incoming switch 27 of the 380V section of the black start.
The specific operation of the step 4) is as follows:
41) closing a first 9E combustion engine high-voltage station bus standby power supply incoming line switch 33, and providing a black start power supply for a first 9E combustion engine high-voltage station bus 31 through a 9E combustion engine high-voltage standby section 11; the first 9E combustion engine is started by using a black start power supply provided by the 9E combustion engine high-voltage standby section 11, after the first 9E combustion engine finishes speed increase and purging, the first 9E combustion engine is fixed at 3000 revolutions per minute, the voltage of a generator of the first 9E combustion engine is built to a rated voltage, and the first 9E combustion engine high-voltage plant transformer 2 recovers power supply;
42) the inlet wire switch 33 of the standby bus power supply for the high-voltage plant of the first 9E gas turbine is switched off, the inlet wire switch 32 of the working bus power supply for the high-voltage plant of the first 9E gas turbine is switched on, and the first 9E bus 31 for the high-voltage plant of the first 9E gas turbine is restored to be supplied with power by the high-voltage plant transformer 2 of the first 9E gas turbine;
43) disconnecting the high-voltage standby section black-start power supply incoming switch 12 and the black-start low-voltage side switch 29 of the 9E gas turbine, and switching the black-start transformer 30 to power off;
44) disconnecting the first incoming line switch 26 at the 380V section of the black start, disconnecting the second incoming line switch 27 at the 380V section of the black start, disconnecting the outlet circuit breaker 25 of the black start diesel generator, and disconnecting the power failure at the 380V section 28 of the black start; manually stopping the black-start diesel generator 24, and recovering the hot standby state of the black-start diesel generator 24 after the stop is successful;
the specific operation process of the step 5) is as follows:
51) closing the first interconnection switch 36, and providing a black start power supply for the first 9F combustion engine by the first 9E combustion engine high-voltage plant bus 31 through the first interconnection switch 36;
52) the first 9F combustion engine is started by using a black start power supply provided by a first 9E combustion engine high-voltage plant bus 31, after the first 9F combustion engine finishes speed increase and purging, the set constant speed of the first 9F combustion engine is 3000 rpm, the first 9F combustion engine generator 42 builds voltage to rated voltage, the first 9F combustion engine generator outlet circuit breaker 43 is switched on, and the first 9F combustion engine high-voltage plant transformer 38 recovers power supply;
53) disconnecting the first 9F combustion engine high-voltage station bus interconnection switch 36, closing the first 9F combustion engine high-voltage station bus working power supply incoming line switch 35, and recovering the first 9F combustion engine high-voltage station bus 34 to be powered by the first 9F combustion engine high-voltage station transformer 38;
54) manually stopping the No. 1 diesel generator 14, and recovering the No. 1 diesel generator 14 to be in a hot standby state after the stop is successful;
the specific operation of step 6) is:
61) closing the first 9F combustion engine high-voltage station bus standby power incoming line switch 37 and the second 9F combustion engine high-voltage station bus standby power incoming line switch 50, wherein the first 9F combustion engine high-voltage station bus 34 provides black start power for the second 9F combustion engine high-voltage station bus 47;
62) the second 9F combustion engine is started by using a black start power supply provided by the first 9F combustion engine high-voltage plant bus 34, after the second 9F combustion engine finishes speed increase and purging, the set constant speed of the second 9F combustion engine is 3000 rpm, the voltage of a second 9F combustion engine generator 55 is built to a rated voltage, a second 9F combustion engine generator outlet circuit breaker 56 is switched on, and the second 9F combustion engine high-voltage plant transformer 51 recovers power supply;
63) disconnecting the inlet wire switch 50 of the standby power supply of the second 9F combustion engine high-voltage station bus, closing the inlet wire switch 48 of the working power supply of the second 9F combustion engine high-voltage station bus, and recovering the power supply of the second 9F combustion engine high-voltage station bus 47 from the second 9F combustion engine high-voltage station transformer 51;
64) and manually stopping the No. 2 diesel generator 19, and recovering the No. 2 diesel generator 19 from a hot standby state after the stop is successful.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
1. The 9E and 9F gas turbine combined black-start electrical system is characterized by comprising a 9E gas turbine black-start power supply unit (1), a first 9E gas turbine high-voltage plant transformer (2), a first 9E gas turbine high-voltage plant power unit (3), a first 9F gas turbine high-voltage plant power unit (4), a first 9F gas turbine main wiring unit (5), a second 9E gas turbine high-voltage plant transformer (6), a second 9E gas turbine high-voltage plant power unit (7), a second 9F gas turbine high-voltage plant power unit (8), a second 9F gas turbine main wiring unit (9), a 9E gas turbine start-standby transformer (10), a 9E gas turbine high-voltage standby section (11), a 9E gas turbine high-voltage standby section black-start power incoming line switch (12) and a 9E gas turbine high-voltage standby section start-standby power incoming line switch (13);
the 9E combustion engine black start power supply unit (1) comprises a No. 1 diesel generator (14), a No. 2 diesel generator (19), a black start diesel generator (24) and a black start 380V section (28);
a No. 1 diesel generator (14), the No. 2 diesel generator (19) and the black start diesel generator (24) are connected with a black start 380V section (28), the black start 380V section (28) is connected with a 9E gas turbine high-voltage standby section (11) through a 9E gas turbine high-voltage standby section black start power incoming switch (12), a first 9F gas turbine main wiring unit (5) is connected with a first 9E gas turbine high-voltage plant transformer (2) and the 9E gas turbine high-voltage standby section (11) through a first 9F gas turbine high-voltage plant power unit (4) and a first 9E gas turbine high-voltage plant power unit (3), a second 9F gas turbine main wiring unit (9) is connected with the 9E gas turbine high-voltage standby section (11) and a second 9E gas turbine high-voltage plant transformer (6) through a second 9F gas turbine high-voltage plant power unit (8) and a second 9E gas turbine high-voltage plant power unit (7), and the first 9F gas turbine high-voltage plant power unit (4) is connected with the second 9F gas turbine high-voltage plant power unit (8);
the 9E combustion engine starting and standby transformer (10) is connected with the 9E combustion engine high-voltage standby section (11) through a 9E combustion engine high-voltage standby section starting and standby transformer power supply incoming line switch (13).
2. The electrical system for combined black start of a 9E and 9F combustion engine of claim 1, the 9E combustion engine black start power supply unit (1) further comprises a No. 1 diesel generator outlet circuit breaker (15), a No. 1 diesel generator outlet 380V section (16), a first 9F combustion engine accident security section firewood sending inlet wire switch (17), a first 9F combustion engine accident security section (18), a No. 2 diesel generator outlet circuit breaker (20), a No. 2 diesel generator outlet 380V section (21), a second 9F combustion engine accident security section firewood sending inlet wire switch (22), a second 9F combustion engine accident security section (23), a black start diesel generator outlet circuit breaker (25), a black start 380V section first inlet wire switch (26), a black start 380V section second inlet wire switch (27), a black start low-voltage-changing side switch (29) and a black start transformer (30);
the No. 1 diesel generator (14) is connected with the No. 1 diesel generator outlet 380V section (16) through a No. 1 diesel generator outlet circuit breaker (15), the No. 1 diesel generator outlet 380V section (16) is connected with the first 9F gas turbine accident security section (18) through a first 9F gas turbine accident security section diesel sending inlet switch (17), and the No. 1 diesel generator outlet 380V section (16) is connected with the black starting 380V section (28) through a black starting 380V section first inlet switch (26); the No. 2 diesel generator (19) is connected with the No. 2 diesel generator outlet 380V section (21) through a No. 2 diesel generator outlet circuit breaker (20), the No. 2 diesel generator outlet 380V section (21) is connected with the second 9F gas turbine accident safety section (23) through a second 9F gas turbine accident safety section diesel sending inlet switch (22), and the No. 2 diesel generator outlet 380V section (21) is connected with the black starting 380V section (28) through a black starting 380V section second inlet switch (27); the black start diesel generator (24) is connected with a black start 380V section (28) through a black start diesel generator outlet circuit breaker (25); the black start 380V section (28) is connected with the 9E combustion engine high-voltage standby section (11) through a black start low-voltage-to-low-voltage side switch (29), a black start change (30) and a 9E combustion engine high-voltage standby section black start power supply incoming line switch (12).
3. The electrical system for combined black start of 9E and 9F gas turbines as defined in claim 1, wherein the first 9E gas turbine high voltage service unit (3) comprises a first 9E gas turbine high voltage service bus (31), a first 9E gas turbine high voltage service bus working power supply incoming line switch (32), and a first 9E gas turbine high voltage service bus backup power supply incoming line switch (33);
the second 9E combustion engine high-voltage station service power unit (7) comprises a second 9E combustion engine high-voltage station service bus (44), a second 9E combustion engine high-voltage station service bus working power supply incoming line switch (45) and a second 9E combustion engine high-voltage station service bus standby power supply incoming line switch (46);
the first 9E combustion engine high-voltage plant transformer (2) is connected with a first 9E combustion engine high-voltage plant bus (31) through a first 9E combustion engine high-voltage plant bus working power supply incoming line switch (32); the 9E combustion engine high-voltage standby section (11) is connected with a first 9E combustion engine high-voltage station bus (31) through a first 9E combustion engine high-voltage station bus standby power supply incoming line switch (33); the second 9E combustion engine high-voltage plant transformer (6) is connected with a second 9E combustion engine high-voltage plant bus (44) through a second 9E combustion engine high-voltage plant bus working power supply incoming line switch (45); the 9E combustion engine high-voltage standby section (11) is connected with a second 9E combustion engine high-voltage station bus (44) through a second 9E combustion engine high-voltage station bus standby power supply incoming line switch (46);
the first 9F gas turbine high-voltage station service unit (4) is connected with a first 9E gas turbine high-voltage station service bus (31), and the second 9F gas turbine high-voltage station service unit (8) is connected with a second 9E gas turbine high-voltage station service bus (44).
4. The electrical system for combined black start of 9E and 9F gas turbines as defined in claim 1, wherein the first 9F gas turbine high-voltage service unit (4) comprises a first 9F gas turbine high-voltage service bus (34), a first 9F gas turbine high-voltage service bus working power supply incoming line switch (35), a first 9F gas turbine high-voltage service bus standby power supply incoming line switch (37) and a first interconnection switch (36);
the second 9F gas turbine high-voltage station service power unit (8) comprises a second 9F gas turbine high-voltage station service bus (47), a second 9F gas turbine high-voltage station service bus working power supply incoming line switch (48), a second 9F gas turbine high-voltage station service bus standby power supply incoming line switch (50) and an interconnection switch II (49);
the first 9F gas turbine main wiring unit (5) is connected with a first 9F gas turbine high-voltage station bus (34) through a first 9F gas turbine high-voltage station bus working power supply incoming line switch (35); the first 9E combustion engine high-voltage station service power unit (3) is connected with a first 9F combustion engine high-voltage station service bus (34) through a first interconnection switch (36);
the second 9F gas turbine main wiring unit (9) is connected with a second 9F gas turbine high-voltage station bus (47) through a second 9F gas turbine high-voltage station bus working power supply incoming line switch (48); the second 9E combustion engine high-voltage station service power unit (7) is connected with a second 9F combustion engine high-voltage station service bus (47) through a second interconnection switch (49);
and the second 9F combustion engine high-voltage plant bus (47) is connected with the first 9F combustion engine high-voltage plant bus (34) through a second 9F combustion engine high-voltage plant bus standby power incoming line switch (50) and a first 9F combustion engine high-voltage plant bus standby power incoming line switch (37).
5. The electrical system of the combined black start of 9E and 9F combustion engine of claim 1, characterized in that the first 9F combustion engine main wiring unit (5) comprises a first 9F combustion engine generator (42), a first 9F combustion engine outlet circuit breaker (43), a first 9F combustion engine main transformer (39), a first 9F combustion engine main high voltage side circuit breaker (40), a first 9F combustion engine high voltage bus (41) and a first 9F combustion engine high voltage plant transformer (38);
the second 9F gas turbine main connection unit (9) comprises a second 9F gas turbine generator (55), a second 9F gas turbine outlet circuit breaker (56), a second 9F gas turbine main transformer (52), a second 9F gas turbine main transformer high-voltage side circuit breaker (53), a second 9F gas turbine high-voltage bus (54) and a second 9F gas turbine high-voltage station transformer (51);
a first 9F gas turbine generator (42) is connected with the low-voltage side of a first 9F gas turbine main transformer (39) through a first 9F gas turbine outlet circuit breaker (43), a first 9F gas turbine high-voltage bus (41) is connected with the high-voltage side of the first 9F gas turbine main transformer (39) through a first 9F gas turbine main high-voltage side circuit breaker (40), and the low-voltage side of the first 9F gas turbine main transformer (39) is connected with a first 9F gas turbine high-voltage power plant unit (4) through a first 9F gas turbine high-voltage power plant transformer (38);
the second 9F gas turbine generator (55) is connected with the low-voltage side of a second 9F gas turbine main transformer (52) through a second 9F gas turbine outlet circuit breaker (56), a second 9F gas turbine high-voltage bus (54) is connected with the high-voltage side of the second 9F gas turbine main transformer (52) through a second 9F gas turbine main transformer high-voltage side circuit breaker (53), and the low-voltage side of the second 9F gas turbine main transformer (52) is connected with a second 9F gas turbine high-voltage power plant unit (8) through a second 9F gas turbine high-voltage power plant transformer (51).
6. A method of operating an electrical system for black start combined 9E and 9F combustion engine as claimed in any one of claims 1 to 5, comprising the steps of:
1) the black start diesel generator (24), the No. 1 diesel generator (14) and the No. 2 diesel generator (19) are ready;
2) starting a black start diesel generator (24);
3) starting a No. 1 diesel generator (14) and a No. 2 diesel generator (19), and preparing a 9E combustion engine black start power supply unit (1);
4)9E black start of the gas turbine;
5) a first 9F gas turbine black start;
6) a second 9F gas turbine black start;
7) the No. 1 diesel generator (14) and the No. 2 diesel generator (19) are restored to a hot standby state.
7. The method for operating the electric system with the combined black start of the 9E and 9F internal combustion engine according to claim 6, wherein the specific operation of the step 1) is as follows:
11) placing the black start diesel generator (24) in a hot standby state;
12) placing a No. 1 diesel generator (14) in a hot standby state;
13) the No. 2 diesel generator (19) is in a hot standby state.
8. The working method of the electric system with the combined black start of the 9E and 9F internal combustion engine according to claim 6, wherein the specific operation of the step 2) is as follows:
21) the method comprises the following steps that when a power grid collapses, the 9E unit loses power from the whole plant, a 9E gas turbine starting and standby transformer (10), a first 9E gas turbine high-voltage plant bus (31), a second 9E gas turbine high-voltage plant bus (44), a first 9E gas turbine high-voltage plant transformer (2) and a second 9E gas turbine high-voltage plant transformer (6) are all in a power loss state, and a black-start diesel generator (24) receives a 9E unit black-start instruction;
22) the black-start diesel generator (24) is started after receiving a black-start instruction of the 9E unit, the rotating speed of the black-start diesel generator (24) is increased to a rated rotating speed, the black-start diesel generator (24) is excited, after the black-start diesel generator (24) is successfully built, an outlet circuit breaker (25) of the black-start diesel generator is switched on, and a 380V section (28) of the black start is electrified;
23) closing a black start low-voltage side switch (29), and charging a black start low-voltage side switch (30); closing the 9E gas turbine high-voltage standby section black starting power supply incoming line switch (12), and restoring power supply of the 9E gas turbine high-voltage standby section (11);
24) after the No. 1 diesel generator (14) and the No. 2 diesel generator (19) are connected with the 380V black start section (28), the 9E combustion engine black start power supply is ready.
9. The method of operating a 9E and 9F combustion engine combined black start electrical system of claim 6, wherein the specific operation of step 3) is:
31) the 9F gas turbine loses power from the whole plant;
32) after a No. 1 diesel generator (14) and a No. 2 diesel generator (19) detect that a first 9F gas turbine accident security section (18) and a second 9F gas turbine accident security section (23) lose power, the automatic starting is carried out, when the No. 1 diesel generator (14) and the No. 2 diesel generator (19) reach rated rotating speeds, excitation is automatically put in, the No. 1 diesel generator (14) and the No. 2 diesel generator (19) are successfully built, a No. 1 diesel generator outlet circuit breaker (15) and a No. 2 diesel generator outlet circuit breaker (20) are switched on, and a 380V black starting section (28) is electrified;
33) a first 9F gas turbine accident safety section firewood sending inlet wire switch (17) and a second 9F gas turbine accident safety section firewood sending inlet wire switch (22) are switched on, and the first 9F gas turbine accident safety section (18) and the second 9F gas turbine accident safety section (23) recover to supply power;
34) the loads on the first 9F combustion engine accident safety section (18) and the second 9F combustion engine accident safety section (23) are restored to supply power;
35) the 380V section (16) of the No. 1 diesel generator outlet is connected with the 380V section (28) of the black start through a first inlet switch (26) of the 380V section of the black start; and the 380V section (21) of the No. 2 diesel generator outlet is connected with the 380V section (28) of the black start through a second inlet switch (27) of the 380V section of the black start.
10. The working method of the electric system with the combined black start of the 9E and 9F internal combustion engine according to claim 6, wherein the specific operation of the step 4) is as follows:
41) closing a first 9E combustion engine high-voltage station bus standby power supply incoming line switch (33), and providing a black start power supply for a first 9E combustion engine high-voltage station bus (31) through a 9E combustion engine high-voltage standby section (11); the first 9E combustion engine is started by using a black start power supply provided by a 9E combustion engine high-voltage standby section (11), after the first 9E combustion engine finishes speed increase and purging, the first 9E combustion engine is at a constant speed of 3000 rpm, the generator of the first 9E combustion engine builds voltage to a rated voltage, and the first 9E combustion engine high-voltage station transformer (2) recovers power supply;
42) a first 9E combustion engine high-voltage plant bus standby power supply incoming line switch (33) is switched off, a first 9E combustion engine high-voltage plant bus working power supply incoming line switch (32) is switched on, and a first 9E combustion engine high-voltage plant bus (31) is restored to be supplied with power by a first 9E combustion engine high-voltage plant transformer (2);
43) disconnecting a high-voltage standby section black-start power supply incoming line switch (12) and a black-start low-voltage side switch (29) of the 9E gas turbine, and powering off a black-start transformer (30);
44) a first incoming line switch (26) of a 380V section of the black start is disconnected, a second incoming line switch (27) of the 380V section of the black start is disconnected, an outlet circuit breaker (25) of the black start diesel generator is disconnected, and a 380V section (28) of the black start is powered off; manually stopping the black-start diesel generator (24), and recovering the hot standby state of the black-start diesel generator (24) after the stop is successful;
the specific operation process of the step 5) is as follows:
51) closing a first interconnection switch (36), and providing a black start power supply for the first 9F combustion engine by the first 9E combustion engine high-voltage plant bus (31) through the first interconnection switch (36);
52) the first 9F combustion engine is started by using a black start power supply provided by a first 9E combustion engine high-voltage plant bus (31), after the first 9F combustion engine finishes speed rising and purging, the set constant speed of the first 9F combustion engine is 3000 rpm, the voltage of a first 9F combustion engine generator (42) is built to a rated voltage, a first 9F combustion engine generator outlet circuit breaker (43) is switched on, and the first 9F combustion engine high-voltage plant transformer (38) recovers power supply;
53) disconnecting a first 9F combustion engine high-voltage station bus interconnection switch (36), closing a first 9F combustion engine high-voltage station bus working power supply incoming line switch (35), and recovering the first 9F combustion engine high-voltage station bus (34) from being supplied with power by a first 9F combustion engine high-voltage station transformer (38);
54) manually stopping the No. 1 diesel generator (14), and recovering the No. 1 diesel generator (14) in a hot standby state after the stop is successful;
the specific operation of step 6) is:
61) closing a first 9F gas turbine high-voltage station bus standby power incoming line switch (37) and a second 9F gas turbine high-voltage station bus standby power incoming line switch (50), wherein the first 9F gas turbine high-voltage station bus (34) provides a black start power supply for a second 9F gas turbine high-voltage station bus (47);
62) the second 9F combustion engine is started by using a black start power supply provided by a first 9F combustion engine high-voltage plant bus (34), after the second 9F combustion engine finishes speed increase and purging, the set constant speed of the second 9F combustion engine is 3000 rpm, the voltage of a second 9F combustion engine generator (55) is built to a rated voltage, a second 9F combustion engine generator outlet circuit breaker (56) is switched on, and the second 9F combustion engine high-voltage plant transformer (51) recovers power supply;
63) disconnecting a second 9F combustion engine high-voltage station bus standby power supply incoming line switch (50), closing a second 9F combustion engine high-voltage station bus working power supply incoming line switch (48), and recovering the second 9F combustion engine high-voltage station bus (47) to be supplied with power by a second 9F combustion engine high-voltage station transformer (51);
64) and (3) manually stopping the No. 2 diesel generator (19), and recovering the No. 2 diesel generator (19) in a hot standby state after the stop is successful.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011282183.2A CN112290669A (en) | 2020-11-16 | 2020-11-16 | Electrical system for combined black start of 9E and 9F gas turbine and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994103A (en) * | 2021-03-22 | 2021-06-18 | 山东电力建设第三工程有限公司 | Novel gas turbine-black start system starting method |
| CN113555898A (en) * | 2021-07-12 | 2021-10-26 | 北京华鼎电源集团有限公司 | Island black start mode of high-voltage gas generator set |
-
2020
- 2020-11-16 CN CN202011282183.2A patent/CN112290669A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994103A (en) * | 2021-03-22 | 2021-06-18 | 山东电力建设第三工程有限公司 | Novel gas turbine-black start system starting method |
| CN112994103B (en) * | 2021-03-22 | 2023-11-21 | 山东电力建设第三工程有限公司 | Starting method of gas turbine-black start system |
| CN113555898A (en) * | 2021-07-12 | 2021-10-26 | 北京华鼎电源集团有限公司 | Island black start mode of high-voltage gas generator set |
| CN113555898B (en) * | 2021-07-12 | 2023-10-24 | 北京华鼎电源集团有限公司 | Island black starting method of high-pressure gas generator set |
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