CN113555898A - Island black start mode of high-voltage gas generator set - Google Patents
Island black start mode of high-voltage gas generator set Download PDFInfo
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- CN113555898A CN113555898A CN202110786420.7A CN202110786420A CN113555898A CN 113555898 A CN113555898 A CN 113555898A CN 202110786420 A CN202110786420 A CN 202110786420A CN 113555898 A CN113555898 A CN 113555898A
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- 230000005540 biological transmission Effects 0.000 claims description 3
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- 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 discloses an island black start mode of a high-voltage gas generator set, which relates to the technical field of generator sets, in particular to S1 for determining a high-voltage generator set to be started; s2, distributing switches; s3, detecting the state of the unit; s4, starting the low-pressure diesel black to start the generator set; and S5, starting the auxiliary equipment of the unit, and S6, and completing the black start mode. This black start mode of high pressure gas generating set island, adopt low pressure diesel generating set and the interior auxiliary transformer low pressure system power of factory to carry out low pressure side parallel operation in order to solve low pressure diesel generating set and high voltage generating set and send out the power parallel operation problem, and adopt parallel operation control screen to carry out parallel operation control to low pressure black start diesel generating set and transformer low pressure side, through the reverse parallel operation of low pressure diesel generating set and transformer low pressure side, parallel operation control screen detects transformer low pressure side and has voltage, be favorable to timely effectual realization parallel operation, and make load transfer switch flow level and smooth, high efficiency, little influence to the system.
Description
Technical Field
The invention relates to the technical field of generator sets, in particular to an island black start mode of a high-voltage gas generator set.
Background
The high-pressure gas generating set fully utilizes various natural gases or harmful gases as fuels to generate electricity, thereby improving the power energy for enterprises and factories, the high-pressure gas generating set needs to provide power for auxiliary equipment of the set before starting, the auxiliary equipment of the high-pressure gas generating set such as an air inlet fan and an air exhaust fan, a high-temperature water circulating water pump, a low-temperature water circulating water pump and the like provide power to enable the auxiliary equipment to operate, the generator set with a self-starting function is enabled to realize self-starting through an isolated island black start mode in an electric power system, and then the generator set without self-starting capability is driven, thereby realizing the recovery operation of the high-pressure gas generating set.
The existing high-voltage gas generator set needs to be automatically started through an island black start mode when meeting a power failure condition, but the problem that how to realize power parallel operation between a low-voltage generator set and a high-voltage generator set does not influence each other, and the problem needs to be solved in time at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an island black start mode of a high-voltage gas generator set, which solves the problems that the prior high-voltage gas generator set needs to realize self-start through the island black start mode when meeting a power failure condition, but how to realize power supply parallel operation between a low-voltage generator set and the high-voltage generator set does not cause mutual influence, and the prior high-voltage gas generator set needs to be solved in time.
In order to achieve the purpose, the invention is realized by the following technical scheme: a black start mode of an island of a high-voltage gas generator set comprises the following operation steps:
s1, determining a high-voltage generator set needing to be started:
firstly, determining which system the high-voltage generator set to be started belongs to, checking the corresponding frame switch position and feeder switch position, and placing vacuum circuit breakers VCB1-VCB8 of a used combined machine set cabinet at working positions according to the machine set to be started, wherein the output cabinet 1-output cabinet 3 are controlled locally, and the corresponding vacuum circuit breakers VCB17, VCB18 and VCB19 of the output cabinet are at the working positions;
s2, switch distribution:
the feeder cabinet of the low-voltage distribution system in the system 1 is remotely controlled, the frame circuit breaker is a working position, the molded case circuit breaker 431 of the low-voltage distribution feeder cabinet in the system 1 is a working position and is in a closing state, and feeder switches in other low-voltage distribution systems are arranged at the working position or a testing position as required;
s3, detecting the state of the unit:
the state of the unit is checked before the low-voltage diesel black-start generator set is started, the black-start generator set outputs a power supply frame breaker at a working position, a voltage detection signal on a cabinet door, a control signal of a low-voltage incoming line cabinet and a feedback signal knob switch are arranged in a system 1, and a feeder switch 432 in a corresponding low-voltage distribution system in the system 2 is arranged at a disconnection position;
s4, starting the low-pressure diesel black start generator set:
the control screen of the low-voltage diesel black start generator set parallel cabinet has three control modes, namely automatic control, semi-automatic control and manual control, the automatic mode is selected from the modes, the voltage of the incoming line side of the low-voltage distribution system incoming line cabinet in the parallel control screen detection system 1 is in a mains supply state, the low-voltage diesel black start generator set is started after 5 seconds of delay, after the voltage of the generator set is stable, the black start parallel control screen controls the closing 403 of the black start output switch cabinet, at the moment, the low-voltage incoming line switch 401 in the low-voltage distribution system is in an opening state, the parallel control system can detect the working position states of the 431 switch and the 432 switch and whether to close and open the switch before closing the 403 switch, and when the two switches are in the closing position, the closing of the 431 switch is strictly prohibited, and the closing 403 is not allowed;
s5, starting auxiliary equipment of the unit:
when the 403 switch is switched on, the bus of the low-voltage distribution system in the system 1 is electrified, and a power supply is sent to the auxiliary power cabinet of the high-voltage generator set through the feeder switch of the low-voltage distribution system to supply the high-voltage generator set to be started to start a pre-started fan, a water pump and other equipment needing to be started in advance to work;
s6, completing the black start mode:
after a high-voltage generating set in the system 1 generates power, a high-voltage bus in the system 1 is electrified, an output cabinet 1 and a vacuum circuit breaker VCB17 are electrified after the inspection, the inlet wire end of a low-voltage inlet cabinet in a low-voltage distribution system in the system 1 is electrified, the parallel operation control screen of the low-voltage diesel black start generating set detects the electrification of an upper port of low voltage 401, the parallel operation control screen adjusts the rotating speed and the voltage of the black start generating set after the set detection time, so that the phase angle, the phase sequence and the voltage amplitude of the black start generating set and the upper port power supply of the low-voltage distribution system 401 are in the condition range of parallel operation set parameters, the parallel operation control screen immediately outputs a closing signal at the moment, the 401 frame circuit breaker immediately closes, and the parallel operation control screen slowly transfers the load of the low-voltage diesel black start generating set to a low-voltage transformer side power supply used by the low-voltage distribution system for carrying load, when the load on the black-start generator set is reduced to be below the set range, the parallel operation control screen controls 403 the frame circuit breaker to be immediately switched off, and the black-start process of the low-voltage diesel black-start generator set of the system is completed.
Optionally, in step S1, the high-voltage generator sets are combined in the system 1 from the combined cabinet 1 to the combined cabinet 8.
Optionally, the control mode of the cabinet combination 1 to the cabinet combination 8 is remote control.
Optionally, in step S1, the output cabinets 1 to 3 are high-voltage feeder cabinets in the system 1, the system 1 is a high-voltage system, and the system 2 is a low-voltage system.
Optionally, in step S3, the feeder switch 432 in the low-voltage distribution system is a circuit breaker with a plastic casing for reversing power transmission of the diesel black-start generator set in the system 2.
Optionally, in step S4, the automatic mode control and the semi-automatic mode control are normally used in three control modes.
Optionally, in step S4, the same padlock is used between the 431 switch and the 432 switch, so that they cannot operate simultaneously.
Optionally, in step S4, when both the switch 431 and the switch 432 are at the closing position, the switch 403 is strictly prohibited from being closed, and the switch is also not allowed to be closed, which belongs to the electrical interlock control.
Optionally, in step S4, the low-pressure diesel soot start generator set is started after delaying for 5 seconds, where the time of the delay may be changed.
Optionally, the high-voltage gas generator set island black start mode is applied to the field of park power plants or factory self-service power stations.
The invention provides an island black start mode of a high-voltage gas generator set, which has the following beneficial effects:
in the isolated island black start mode of the high-voltage gas generator set, a low-voltage side parallel operation is carried out by adopting a low-voltage diesel generator set and a low-voltage system power supply of an auxiliary transformer in a factory to solve the problem of power supply parallel operation of the low-voltage diesel generator set and the high-voltage generator set, a parallel operation control screen is adopted to carry out parallel operation control on the low-voltage side of the low-voltage black start diesel generator set and the low-voltage side of the transformer, the black start power supply is provided for a low-voltage system by carrying out reverse parallel operation on the low-voltage side of the transformer and the low-voltage side of the transformer, when the transformer is electrified, the parallel operation control screen detects that the voltage is on the low-voltage side of the transformer, the voltage and the rotating speed of the low-voltage diesel generator set are adjusted to be smooth, the parallel operation is successfully carried out with the low-voltage side of the transformer, then the load on the low-voltage diesel generator set is smoothly transferred to the low-voltage side power supply of the transformer, a diesel generator set switch circuit breaker is separated, and the low-voltage diesel generator set is stopped, the parallel operation device is beneficial to timely and effectively realizing parallel operation, and has the advantages of smooth load transfer switching flow, high efficiency and small influence on the system.
Drawings
FIG. 1 is a schematic overall flow diagram of the present invention;
FIG. 2 is an enlarged schematic flow diagram at A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged schematic flow chart of FIG. 1 at B according to the present invention;
FIG. 4 is an enlarged schematic flow chart at C of FIG. 1 according to the present invention;
FIG. 5 is an enlarged schematic flow chart of FIG. 1 at D according to the present invention;
FIG. 6 is an enlarged schematic flow chart at E in FIG. 1 according to the present invention;
FIG. 7 is an enlarged schematic flow chart at F of FIG. 1 according to the present invention;
FIG. 8 is an enlarged schematic view of the process of FIG. 1 at G according to the present invention;
FIG. 9 is an enlarged schematic view of the process at H in FIG. 1 according to the present invention.
Detailed Description
Referring to fig. 1 to 9, the present invention provides a technical solution: a black start mode of an island of a high-voltage gas generator set comprises the following operation steps:
s1, determining a high-voltage generator set needing to be started:
firstly, determining which system the high-voltage generator set to be started belongs to, checking the corresponding frame switch position and feeder switch position, and placing vacuum circuit breakers VCB1-VCB8 of a used combined machine set cabinet at working positions according to the machine set to be started, wherein the output cabinet 1-output cabinet 3 are controlled locally, and the corresponding vacuum circuit breakers VCB17, VCB18 and VCB19 of the output cabinet are at the working positions;
s2, switch distribution:
the feeder cabinet of the low-voltage distribution system in the system 1 is remotely controlled, the frame circuit breaker is a working position, the molded case circuit breaker 431 of the low-voltage distribution feeder cabinet in the system 1 is a working position and is in a closing state, and feeder switches in other low-voltage distribution systems are arranged at the working position or a testing position as required;
s3, detecting the state of the unit:
the state of the unit is checked before the low-voltage diesel black-start generator set is started, the black-start generator set outputs a power supply frame breaker at a working position, a voltage detection signal on a cabinet door, a control signal of a low-voltage incoming line cabinet and a feedback signal knob switch are arranged in a system 1, and a feeder switch 432 in a corresponding low-voltage distribution system in the system 2 is arranged at a disconnection position;
s4, starting the low-pressure diesel black start generator set:
the control screen of the low-voltage diesel black start generator set parallel cabinet has three control modes, namely automatic control, semi-automatic control and manual control, the automatic mode is selected from the modes, the voltage of the incoming line side of the low-voltage distribution system incoming line cabinet in the parallel control screen detection system 1 is in a mains supply state, the low-voltage diesel black start generator set is started after 5 seconds of delay, after the voltage of the generator set is stable, the black start parallel control screen controls the closing 403 of the black start output switch cabinet, at the moment, the low-voltage incoming line switch 401 in the low-voltage distribution system is in an opening state, the parallel control system can detect the working position states of the 431 switch and the 432 switch and whether to close and open the switch before closing the 403 switch, and when the two switches are in the closing position, the closing of the 431 switch is strictly prohibited, and the closing 403 is not allowed;
s5, starting auxiliary equipment of the unit:
when the 403 switch is switched on, the bus of the low-voltage distribution system in the system 1 is electrified, and a power supply is sent to the auxiliary power cabinet of the high-voltage generator set through the feeder switch of the low-voltage distribution system to supply the high-voltage generator set to be started to start a pre-started fan, a water pump and other equipment needing to be started in advance to work;
s6, completing the black start mode:
after a high-voltage generating set in the system 1 generates power, a high-voltage bus in the system 1 is electrified, an output cabinet 1 and a vacuum circuit breaker VCB17 are electrified after the inspection, the inlet wire end of a low-voltage inlet cabinet in a low-voltage distribution system in the system 1 is electrified, the parallel operation control screen of the low-voltage diesel black start generating set detects the electrification of an upper port of low voltage 401, the parallel operation control screen adjusts the rotating speed and the voltage of the black start generating set after the set detection time, so that the phase angle, the phase sequence and the voltage amplitude of the black start generating set and the upper port power supply of the low-voltage distribution system 401 are in the condition range of parallel operation set parameters, the parallel operation control screen immediately outputs a closing signal at the moment, the 401 frame circuit breaker immediately closes, and the parallel operation control screen slowly transfers the load of the low-voltage diesel black start generating set to a low-voltage transformer side power supply used by the low-voltage distribution system for carrying load, when the load on the black-start generator set is reduced to be below the set range, the parallel operation control screen controls 403 the frame circuit breaker to be immediately switched off, and the black-start process of the low-voltage diesel black-start generator set of the system is completed.
In step S1, the high voltage generator sets are combined cabinet 1 to combined cabinet 8 in the system 1.
And the control modes from the cabinet 1 to the cabinet 8 are remote control.
In step S1, the output cabinets 1 to 3 are high-voltage feeder cabinets in the system 1, the system 1 is a high-voltage system, and the system 2 is a low-voltage system.
In step S3, the feeder switch 432 in the low-voltage distribution system is the reverse power transmission plastic-shelled circuit breaker for the diesel black-start generator set in the system 2.
In step S4, the automatic mode control and the semi-automatic mode control are normally used among the three control modes.
In step S4, the 431 switch and the 432 switch are operated simultaneously with the same padlock.
In step S4, when both the switch 431 and the switch 432 are at the closing position, the switch 403 is strictly prohibited from closing, and the switch is not allowed to close, which belongs to the electrical interlock control.
In step S4, the low-pressure diesel soot generator set is started after delaying for 5 seconds, wherein the time of the delay can be changed.
The black start mode of the island of the high-voltage gas generator set is applied to the field of park power plants or factory self-service power stations.
In the isolated island black start mode of the high-voltage gas generator set, a low-voltage side parallel operation is carried out by adopting a low-voltage diesel generator set and a low-voltage system power supply of an auxiliary transformer in a factory to solve the problem of power supply parallel operation of the low-voltage diesel generator set and the high-voltage generator set, a parallel operation control screen is adopted to carry out parallel operation control on the low-voltage side of the low-voltage black start diesel generator set and the low-voltage side of the transformer, the black start power supply is provided for a low-voltage system by carrying out reverse parallel operation on the low-voltage side of the transformer and the low-voltage side of the transformer, when the transformer is electrified, the parallel operation control screen detects that the voltage is on the low-voltage side of the transformer, the voltage and the rotating speed of the low-voltage diesel generator set are adjusted to be smooth, the parallel operation is successfully carried out with the low-voltage side of the transformer, then the load on the low-voltage diesel generator set is smoothly transferred to the low-voltage side power supply of the transformer, a diesel generator set switch circuit breaker is separated, and the low-voltage diesel generator set is stopped, the parallel operation device is beneficial to timely and effectively realizing parallel operation, and has the advantages of smooth load transfer switching flow, high efficiency and small influence on the system.
In summary, the island black start mode of the high-voltage gas generator set comprises the following operation steps:
determining a high-voltage generator set needing to be started: firstly, determining which system the high-voltage generator set to be started belongs to, checking the corresponding frame switch position and feeder switch position, and placing vacuum circuit breakers VCB1-VCB8 of a used combined machine set cabinet at working positions according to the machine set to be started, wherein the output cabinet 1-output cabinet 3 are controlled locally, and the corresponding vacuum circuit breakers VCB17, VCB18 and VCB19 of the output cabinet are at the working positions;
switch distribution: the feeder cabinet of the low-voltage distribution system in the system 1 is remotely controlled, the frame circuit breaker is a working position, the molded case circuit breaker 431 of the low-voltage distribution feeder cabinet in the system 1 is a working position and is in a closing state, and feeder switches in other low-voltage distribution systems are arranged at the working position or a testing position as required;
detecting the state of the unit: the state of the unit is checked before the low-voltage diesel black-start generator set is started, the black-start generator set outputs a power supply frame breaker at a working position, a voltage detection signal on a cabinet door, a control signal of a low-voltage incoming line cabinet and a feedback signal knob switch are arranged in a system 1, and a feeder switch 432 in a corresponding low-voltage distribution system in the system 2 is arranged at a disconnection position;
starting the low-pressure diesel black to start the generator set: the control screen of the low-voltage diesel black start generator set parallel cabinet has three control modes, namely automatic control, semi-automatic control and manual control, the automatic mode is selected from the modes, the voltage of the incoming line side of the low-voltage distribution system incoming line cabinet in the parallel control screen detection system 1 is in a mains supply state, the low-voltage diesel black start generator set is started after 5 seconds of delay, after the voltage of the generator set is stable, the black start parallel control screen controls the closing 403 of the black start output switch cabinet, at the moment, the low-voltage incoming line switch 401 in the low-voltage distribution system is in an opening state, the parallel control system can detect the working position states of the 431 switch and the 432 switch and whether to close and open the switch before closing the 403 switch, and when the two switches are in the closing position, the closing of the 431 switch is strictly prohibited, and the closing 403 is not allowed;
starting auxiliary equipment of the unit: when the 403 switch is switched on, the bus of the low-voltage distribution system in the system 1 is electrified, and a power supply is sent to the auxiliary power cabinet of the high-voltage generator set through the feeder switch of the low-voltage distribution system to supply the high-voltage generator set to be started to start a pre-started fan, a water pump and other equipment needing to be started in advance to work;
the black start mode is completed: after a high-voltage generating set in the system 1 generates power, a high-voltage bus in the system 1 is electrified, an output cabinet 1 and a vacuum circuit breaker VCB17 are electrified after the inspection, the inlet wire end of a low-voltage inlet cabinet in a low-voltage distribution system in the system 1 is electrified, the parallel operation control screen of the low-voltage diesel black start generating set detects the electrification of an upper port of low voltage 401, the parallel operation control screen adjusts the rotating speed and the voltage of the black start generating set after the set detection time, so that the phase angle, the phase sequence and the voltage amplitude of the black start generating set and the upper port power supply of the low-voltage distribution system 401 are in the condition range of parallel operation set parameters, the parallel operation control screen immediately outputs a closing signal at the moment, the 401 frame circuit breaker immediately closes, and the parallel operation control screen slowly transfers the load of the low-voltage diesel black start generating set to a low-voltage transformer side power supply used by the low-voltage distribution system for carrying load, when the load on the black start generator set is reduced to be below the set range, the parallel operation control screen controls 403 the frame circuit breaker to be immediately switched off, and the black start process of the low-voltage diesel black start generator set of the system is finished;
in the isolated island black start mode of the high-voltage gas generator set, a low-voltage side parallel operation is carried out by adopting a low-voltage diesel generator set and a low-voltage system power supply of an auxiliary transformer in a factory to solve the problem of power supply parallel operation of the low-voltage diesel generator set and the high-voltage generator set, a parallel operation control screen is adopted to carry out parallel operation control on the low-voltage side of the low-voltage black start diesel generator set and the low-voltage side of the transformer, the black start power supply is provided for a low-voltage system by carrying out reverse parallel operation on the low-voltage side of the transformer and the low-voltage side of the transformer, when the transformer is electrified, the parallel operation control screen detects that the voltage is on the low-voltage side of the transformer, the voltage and the rotating speed of the low-voltage diesel generator set are adjusted to be smooth, the parallel operation is successfully carried out with the low-voltage side of the transformer, then the load on the low-voltage diesel generator set is smoothly transferred to the low-voltage side power supply of the transformer, a diesel generator set switch circuit breaker is separated, and the low-voltage diesel generator set is stopped, the parallel operation device is beneficial to timely and effectively realizing parallel operation, and has the advantages of smooth load transfer switching flow, high efficiency and small influence on the system.
Claims (10)
1. The utility model provides a black start mode of high pressure gas generating set island which characterized in that: the method comprises the following operation steps:
s1, determining a high-voltage generator set needing to be started:
firstly, determining which system the high-voltage generator set to be started belongs to, checking the corresponding frame switch position and feeder switch position, and placing vacuum circuit breakers VCB1-VCB8 of a used combined machine set cabinet at working positions according to the machine set to be started, wherein the output cabinet 1-output cabinet 3 are controlled locally, and the corresponding vacuum circuit breakers VCB17, VCB18 and VCB19 of the output cabinet are at the working positions;
s2, switch distribution:
the feeder cabinet of the low-voltage distribution system in the system 1 is remotely controlled, the frame circuit breaker is a working position, the molded case circuit breaker 431 of the low-voltage distribution feeder cabinet in the system 1 is a working position and is in a closing state, and feeder switches in other low-voltage distribution systems are arranged at the working position or a testing position as required;
s3, detecting the state of the unit:
the state of the unit is checked before the low-voltage diesel black-start generator set is started, the black-start generator set outputs a power supply frame breaker at a working position, a voltage detection signal on a cabinet door, a control signal of a low-voltage incoming line cabinet and a feedback signal knob switch are arranged in a system 1, and a feeder switch 432 in a corresponding low-voltage distribution system in the system 2 is arranged at a disconnection position;
s4, starting the low-pressure diesel black start generator set:
the control screen of the low-voltage diesel black start generator set parallel cabinet has three control modes, namely automatic control, semi-automatic control and manual control, the automatic mode is selected from the modes, the voltage of the incoming line side of the low-voltage distribution system incoming line cabinet in the parallel control screen detection system 1 is in a mains supply state, the low-voltage diesel black start generator set is started after 5 seconds of delay, after the voltage of the generator set is stable, the black start parallel control screen controls the closing 403 of the black start output switch cabinet, at the moment, the low-voltage incoming line switch 401 in the low-voltage distribution system is in an opening state, the parallel control system can detect the working position states of the 431 switch and the 432 switch and whether to close and open the switch before closing the 403 switch, and when the two switches are in the closing position, the closing of the 431 switch is strictly prohibited, and the closing 403 is not allowed;
s5, starting auxiliary equipment of the unit:
when the 403 switch is switched on, the bus of the low-voltage distribution system in the system 1 is electrified, and a power supply is sent to the auxiliary power cabinet of the high-voltage generator set through the feeder switch of the low-voltage distribution system to supply the high-voltage generator set to be started to start a pre-started fan, a water pump and other equipment needing to be started in advance to work;
s6, completing the black start mode:
after a high-voltage generating set in the system 1 generates power, a high-voltage bus in the system 1 is electrified, an output cabinet 1 and a vacuum circuit breaker VCB17 are electrified after the inspection, the inlet wire end of a low-voltage inlet cabinet in a low-voltage distribution system in the system 1 is electrified, the parallel operation control screen of the low-voltage diesel black start generating set detects the electrification of an upper port of low voltage 401, the parallel operation control screen adjusts the rotating speed and the voltage of the black start generating set after the set detection time, so that the phase angle, the phase sequence and the voltage amplitude of the black start generating set and the upper port power supply of the low-voltage distribution system 401 are in the condition range of parallel operation set parameters, the parallel operation control screen immediately outputs a closing signal at the moment, the 401 frame circuit breaker immediately closes, and the parallel operation control screen slowly transfers the load of the low-voltage diesel black start generating set to a low-voltage transformer side power supply used by the low-voltage distribution system for carrying load, when the load on the black-start generator set is reduced to be below the set range, the parallel operation control screen controls 403 the frame circuit breaker to be immediately switched off, and the black-start process of the low-voltage diesel black-start generator set of the system is completed.
2. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in the step S1, the high-voltage generator sets are combined in the system 1 from the cabinet 1 to the cabinet 8.
3. The high-voltage gas generator set island black start mode according to claim 2, characterized in that: the control modes from the combined cabinet 1 to the combined cabinet 8 are remote control.
4. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in step S1, the output cabinets 1 to 3 are high-voltage feeder cabinets in the system 1, the system 1 is a high-voltage system, and the system 2 is a low-voltage system.
5. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in step S3, the feeder switch 432 in the low-voltage distribution system is a circuit breaker with a plastic shell for reversing power transmission of the diesel black-start generator set in the system 2.
6. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in step S4, the automatic mode control and the semi-automatic mode control are normally used among the three control modes.
7. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in step S4, the 431 switch and the 432 switch are configured to be operated simultaneously with the same padlock.
8. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in step S4, the 431 switch and the 432 switch are both disabled from being closed 403 and are not allowed to be closed when they are at the closing position, and the method belongs to the electrical interlock control.
9. The high-voltage gas generator set island black start mode according to claim 1, characterized in that: in the step S4, the low-pressure diesel black is started after delaying for 5 seconds, wherein the delayed time can be changed.
10. A high voltage gas generator set islanding black start mode according to any of claims 1-9, characterized in that: the high-voltage gas generator set island black start mode is applied to the field of park power plants or factory self-service power stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110786420.7A CN113555898B (en) | 2021-07-12 | 2021-07-12 | Island black starting method of high-pressure gas generator set |
Applications Claiming Priority (1)
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