CN114285072A - Automatic sequential control method, system, terminal and medium for dual-node synchronization grid connection of heavy-duty gas turbine - Google Patents
Automatic sequential control method, system, terminal and medium for dual-node synchronization grid connection of heavy-duty gas turbine Download PDFInfo
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Abstract
The application provides a method, a system, a terminal and a medium for automatically and sequentially controlling a heavy gas turbine in a double-node synchronous grid connection mode, wherein after the rotating speed of a gas turbine generator reaches a preset frequency, two branches are generated through the on-off state of a motor outlet circuit breaker and a high-voltage circuit breaker; if the high-voltage circuit breaker and the motor outlet circuit breaker are in an off state, entering a first branch; if the high-voltage circuit breaker is in a closing state and the generator outlet circuit breaker is in a breaking state, entering a second branch; and starting an excitation system after the path of the second branch is finished, and closing the motor outlet circuit breaker to finish the sequential starting of the gas turbine. The invention omits the process of manually switching on HVCB after the power-saving operation of an original heavy gas turbine generator set, forms a double-node synchronous grid-connected automatic sequence control method through extraction and optimization process flows, increases the automation control level of a power plant, shortens the time for connecting the generator set with a power grid, improves the economy of the operation of the generator set and saves the labor cost.
Description
Technical Field
The application relates to the technical field of gas turbine control, in particular to a method, a system, a terminal and a medium for automatic sequential control of a heavy-duty gas turbine during double-node synchronization grid connection.
Background
Heavy-duty gas turbine generator sets are generally wired by using a generator-main transformer set unit, wherein a generator is connected with a main transformer through an outlet circuit breaker (hereinafter, referred to as GCB), and the main transformer is connected to a 220kV power grid through a 220kV switch (hereinafter, referred to as HVCB).
When the HVCB is in a switching-on state, a high-voltage side loop of the 220kV booster station is electrified all the time, and then no-load loss is generated, so that the HVCB needs to be manually disconnected when the unit is stopped for a long time and service power is not needed. In addition, for a power plant with two gas turbine generator sets, the service power of the two generator sets can be shared in a cross mode, when one of the two generator sets is powered on the internet and the other one is off, the HVCB of the off-line generator set can be disconnected, firstly, the no-load loss of the 220kV booster station can be reduced, and the service power is taken from the on-line power supply unit, so that the power cost is greatly reduced compared with the power taking from the power grid.
For a certain heavy-duty combustion engine, when the automatic sequence control program executes the first synchronization grid connection, only the GCB can be selected for synchronization grid connection, and the automatic sequence control program is a single-node automatic synchronization grid connection mode. Therefore, after the electricity-saving operation is carried out, the HVCB needs to be manually re-switched on before starting, otherwise, the HVCB needs to be manually operated to realize synchronous grid connection at full speed and no load, and the HVCB cannot be automatically switched on by a certain heavy combustion engine control system.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present application aims to provide a method, a system, a terminal and a medium for controlling a heavy-duty combustion engine in a dual-node synchronous grid-connection automatic sequence, which are used to solve the technical problems in the prior art that before starting the engine, an HVCB needs to be manually re-switched on, otherwise, when the engine is at full speed and no load, a complex manual operation is needed to implement synchronous grid-connection, and the synchronous grid-connection cannot be automatically completed by a control system of a certain heavy-duty combustion engine.
To achieve the above and other related objects, a first aspect of the present application provides a method for controlling a heavy-duty combustion engine in a dual-node synchronous grid-connection automatic sequence, including: after the rotating speed of the gas turbine generator reaches a preset frequency, generating two branches through the on-off state of a motor outlet circuit breaker and a high-voltage circuit breaker; if the high-voltage circuit breaker and the motor outlet circuit breaker are in an off state, entering a first branch; if the high-voltage circuit breaker is in a closing state and the generator outlet circuit breaker is in a breaking state, entering a second branch; and starting an excitation system after the path of the second branch is finished, and closing the motor outlet circuit breaker to finish the sequential starting of the gas turbine.
In some embodiments of the first aspect of the present application, in the first branch, the following steps are performed: entering a simultaneous screen-cutting double-side non-pressure mode; closing a generator outlet circuit breaker; starting an excitation system; entering a screen cutting double-side pressure mode at the same time; and after the operator selects the high-voltage circuit breaker as a synchronization point, the automatic synchronization of the synchronization screen is completed.
In some embodiments of the first aspect of the present application, in the second branch, the excitation system is directly activated after the rotational speed of the combustion engine generator reaches a preset frequency.
In some embodiments of the first aspect of the present application, the predetermined frequency is set to be above 49 Hz.
To achieve the above and other related objects, a second aspect of the present application provides a dual-node synchronization grid-connection automatic sequence control system for a heavy-duty combustion engine, comprising: the branch generation module is used for generating two branches through the on-off state of the motor outlet circuit breaker and the high-voltage circuit breaker after the rotating speed of the gas turbine generator reaches a preset frequency; the first branch module is used for entering a first branch if the high-voltage circuit breaker and the motor outlet circuit breaker are in an off state; the second branch module is used for entering a second branch if the high-voltage circuit breaker is in a closing state and the generator outlet circuit breaker is in a breaking state; and the sequential starting module is used for switching on the motor outlet circuit breaker to complete sequential starting of the gas turbine.
In some embodiments of the second aspect of the present application, the first branch module is configured to perform the following steps: entering a simultaneous screen-cutting double-side non-pressure mode; closing a generator outlet circuit breaker; starting an excitation system; entering a screen cutting double-side pressure mode at the same time; and after the operator selects the high-voltage circuit breaker as a synchronization point, the automatic synchronization of the synchronization screen is completed.
In some embodiments of the second aspect of the present application, the second branch module is configured to perform the direct start-up of the excitation system after the rotational speed of the engine generator reaches a preset frequency.
To achieve the above and other related objects, a third aspect of the present application provides a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the heavy combustion engine grid-connected automatic sequence control method at a dual node synchronization.
To achieve the above and other related objects, a fourth aspect of the present application provides an electronic terminal comprising: a processor and a memory; the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory so as to enable the terminal to execute the automatic sequential control method for the heavy-duty combustion engine during the dual-node synchronization.
As described above, the heavy-duty gas turbine synchronization automatic sequence control method, system, terminal and medium for dual-node synchronization has the following beneficial effects: the invention follows a safe and efficient design concept, pursues artificial intelligent control, and omits the process that a certain original heavy gas turbine generator set needs manual switching on of HVCB after power-saving operation. A double-node synchronous grid-connected automatic sequence control method is formed by refining and optimizing process flows, so that the automatic control level of a power plant is increased, the grid-connected time of a unit and a power grid is greatly shortened, the running economy of the unit is improved, and certain labor cost is saved.
Drawings
Fig. 1 shows a schematic flow diagram of a prior art automatic sequential control method for a heavy combustion engine.
Fig. 2 is a schematic flow chart of an automatic sequential control method for a heavy-duty combustion engine according to an embodiment of the present application.
Fig. 3 is a schematic flow chart of a dual-node synchronization automatic sequence control method for a heavy-duty combustion engine according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a dual-node synchronization grid-connection automatic sequence control system of a heavy-duty combustion engine according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an electronic terminal according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and/or "including" specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. It should be further understood that the terms "or" and/or "as used herein are to be interpreted as being inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.
In order to solve the problems in the background art, the invention provides a novel automatic sequence control scheme for a heavy-duty combustion engine, which can automatically complete synchronous grid connection through any node of GCB or HVCB when the heavy-duty combustion engine is connected to the grid at the first time, and is a substantially double-node automatic synchronous grid connection mode. Specifically, when the HVCB is in a disconnected state, the newly designed automatic sequence control method judges whether to enter a branch which is synchronously connected with the network through the HVCB according to conditions, and automatically completes operations such as synchronous screen mode switching, GCB closing, excitation system starting, HVCB synchronous connection and the like.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are further described in detail by the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
For ease of understanding, the flow of the automatic sequential control method of a heavy duty combustion engine in the prior art is now explained with reference to fig. 1 as follows:
step S1: the stationary frequency converter and its start-up mode are selected.
It should be understood that the gas turbine is a mechanical device using natural gas as power, and since the starting torque of the combustion engine is large, the combustion engine cannot be started by itself, and since a basic rotation speed is also required for the ignition of the combustion engine, external power is required to rotate the whole shaft, a static Frequency converter sfc (static Frequency converter) is generally used as a main starting mode.
Generally, the start-up procedure and logic of the static frequency converter SFC are as follows: when the dragging combustion engine is started, a gas Turbine Control System (TCS) sends an SFC starting instruction, the SFC starts an excitation system and controls excitation current output, the dragging combustion engine is swept and reaches 2100RPM, after the combustion engine reaches 2100RPM, the TCS pushes out the SFC, the combustion engine is self-sustaining, and the SFC sends an excitation quitting instruction.
Steps S2 to S4: and activating the subsystems required for starting the combustion engine.
In some examples, the subsystems required for the gas turbine include, but are not limited to: combustion systems, fuel pre-treatment systems, water scrubbing systems, ventilation systems for tanks, fire protection systems for CO2, etc. Wherein, the combustion system mainly comprises a gas turbine and a flue gas system of a waste heat boiler. The fuel pre-processing system is a processing system of a gas turbine arranged outside a main plant and comprises a secondary fine filtering device, a performance heater, a terminal filter, an electric heating device and the like which operate when the system is started. The washing system mainly comprises a detergent tank, a clean water tank and a washing pump. Ventilation systems gas turbines are supplied in casings to accommodate the need for fast packaging of gas turbines and noise suppression. The CO2 fire protection system is due to the fact that gas turbines are equipped with liquid CO2 storage tanks and therefore require CO2 fire protection.
Steps S5 to S7: starting the SFC; the SFC performs an offline water wash or purge mode; and after purging is finished, waiting for the combustion engine to fall to a rotating speed lower than the ignition rotating speed.
Step S8: and operating the gas module to start and control.
Steps S9 to S10: when the gas turbine generator accelerates to 35Hz, the gas turbine reaches its self-sustaining speed, and the SFC will exit; the gas turbine generator speed was confirmed to be greater than 49 Hz.
Steps S11 to S14: starting an excitation system; automatic synchronization (first synchronization); and (5) completing grid connection.
Steps S15 to S16: a flush is completed (again contemporaneous).
It should be noted that steps S11 to S14 are responsible for executing the first automatic synchronization grid connection function, and the detailed design thereof is shown in fig. 2: and (3) after the rotating speed of the generator of the combustion engine reaches 50Hz, S12 starts an excitation system, S14 selects GCB as a synchronization point by an operator, and then the synchronization screen automatically completes grid connection.
Fig. 3 shows a schematic flow chart of a dual-node synchronization automatic sequence control method for a heavy-duty combustion engine according to an embodiment of the present invention.
Note that step S31 in the present embodiment corresponds to step S11 in fig. 2; steps S32.1 to S32.5 in the present embodiment correspond to step S12 in fig. 2; step S33 in the present embodiment corresponds to step S13 in fig. 2; step S34 in the present embodiment corresponds to step S14 in fig. 2.
It should be further understood that the dual-node synchronous grid-connection automatic sequential control method for the heavy-duty combustion engine can be applied to controllers, such as an arm (advanced RISC machines) controller, an fpga (field Programmable Gate array) controller, an soc (system on chip) controller, a dsp (digital Signal processing) controller, or an mcu (micro controller unit) controller, etc. Also applicable to computers including memory, memory controllers, one or more processing units (CPU), peripheral interfaces, RF circuitry, audio circuitry, speakers, microphones, input/output (I/O) subsystems, display screens, other output or control devices, and external ports; the computer includes, but is not limited to, Personal computers such as desktop computers, notebook computers, tablet computers, smart phones, smart bracelets, smart watches, smart helmets, smart televisions, Personal Digital Assistants (PDAs), and the like. The method can also be applied to servers which can be arranged on one or more entity servers according to various factors such as functions, loads and the like, and can also be formed by distributed or centralized server clusters.
Meanwhile, the terms used in the following steps are explained as follows:
the Gas Turbine (Gas Turbine) is an internal combustion type power machine which takes continuously flowing Gas as a working medium to drive an impeller to rotate at a high speed and converts the energy of fuel into useful work, and is a rotary impeller type heat engine. The gas turbine can be divided into a heavy type gas turbine, a medium and small type gas turbine and a micro type gas turbine; the heavy-duty combustion engine is generally specially designed for industrial power generation and is also the main power applied to a conventional aircraft carrier.
The HVCB is a short for High Voltage Circuit Breaker (High Voltage Circuit Breaker), and not only can cut off or close the no-load current and the load current in the High Voltage Circuit, but also can cut off the overload current and the short-Circuit current through the action of the relay protection device when the system fails, and has a quite perfect arc extinguishing structure and sufficient current breaking capability. The high-voltage circuit breaker in this embodiment may be an oil circuit breaker, a sulfur hexafluoride circuit breaker (SF6 circuit breaker), a compressed air circuit breaker, a vacuum circuit breaker, or the like.
The GCB is a Generator Circuit Breaker (Generator Circuit Breaker) for short, is suitable for various large-scale power plants such as nuclear power, thermal power and hydroelectric power, uses SF6 medium to extinguish arc, and has the maximum short-Circuit breaking current of 210 KA.
In step 31, after the rotation speed of the engine reaches 50Hz, the following two branches are generated through the switching state of the GCB and the HVCB:
if the high-voltage circuit breaker HVCB and the generator outlet circuit breaker GCB are both in an off state, the method enters a synchronization grid connection branch through the high-voltage circuit breaker HVCB, namely, the step S32 is started to be executed. The step S32 is divided into 5 small steps S32.1 to S32.5, and the process proceeds to step S33 to start the excitation system after the execution is completed.
Step S32.1: entering a simultaneous screen-cutting double-side non-pressure mode;
step S32.2: a generator outlet circuit breaker GCB is switched on;
step S32.3: starting an excitation system;
step S32.4: synchronously screen-cutting two sides in a pressure mode;
step S32.5: and an operator selects the high-voltage circuit breaker HVCB as a synchronization point, and then the synchronization screen automatically completes grid connection.
And branch 2: if the high voltage circuit breaker HVCB is in the closed state and the generator outlet circuit breaker GCB is in the open state, the process directly proceeds to step S33 to start the excitation system. That is, the branch 2 reserves the method of synchronous grid-connected automatic sequence control of the original heavy-duty combustion engine through the generator outlet circuit breaker GCB.
Finally, in step S34, the generator outlet breaker GCB is selected by the operator as the synchronization point, and then the synchronization panel automatically completes the grid connection.
Through the brand new design of the invention, the process that an HVCB needs to be manually switched on after the power-saving operation of an original certain heavy-duty gas turbine generator set is successfully saved. A double-node synchronous grid-connected automatic sequence control method is formed by refining and optimizing process flows, so that the automatic control level of a power plant is increased, the grid-connected time of a unit and a power grid is greatly shortened, the running economy of the unit is improved, and certain labor cost is saved.
Fig. 4 shows a schematic structural diagram of an automatic sequential control system for a heavy-duty combustion engine during dual-node synchronization according to an embodiment of the present invention. The automatic sequential control system 400 for the heavy-duty combustion engine in the dual-node synchronization grid connection comprises: the device comprises a branch generation module 401, a first branch module 402, a second branch module 403, an excitation starting module 404 and a sequence starting module 405.
The branch generation module 401 is configured to generate two branches through the switching on and off states of the motor outlet circuit breaker and the high-voltage circuit breaker after the rotation speed of the gas turbine generator reaches a preset frequency; the first branch module 402 is configured to enter a first branch if the high-voltage circuit breaker and the motor outlet circuit breaker are both in an off state; the second branch module 403 is configured to enter a second branch if the high-voltage circuit breaker is in a closed state and the generator outlet circuit breaker is in an open state; the excitation starting module 404 is configured to start the excitation system after the path of the second branch is completed; the sequential starting module 405 is configured to close the motor outlet breaker to complete sequential starting of the combustion engine. It should be noted that, the module provided in this embodiment is similar to the dual-node synchronization automatic sequence control method for the heavy combustion engine, and thus the detailed description is omitted.
It should be understood that the division of the modules of the above system is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the excitation starting module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the system, or may be stored in a memory of the system in the form of program code, and a processing element of the system calls and executes the function of the excitation starting module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 5 is a schematic structural diagram of an electronic terminal according to an embodiment of the present invention. This example provides an electronic terminal, includes: a processor 51, a memory 52, a communicator 53; the memory 52 is connected with the processor 51 and the communicator 53 through a system bus and completes mutual communication, the memory 52 is used for storing computer programs, the communicator 53 is used for communicating with other equipment, and the processor 51 is used for operating the computer programs, so that the electronic terminal executes the steps of the dual-node synchronous grid-connection automatic sequence control method of the heavy-duty combustion engine.
The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The memory may include a Random Access Memory (RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
The invention also provides a computer readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the method for automatic sequential control of a heavy combustion engine on a dual-node synchronous grid-connection.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
In the embodiments provided herein, the computer-readable and writable storage medium may include read-only memory, random-access memory, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, a USB flash drive, a removable hard disk, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable-writable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are intended to be non-transitory, tangible storage media. Disk and disc, as used in this application, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
In summary, the invention provides a method, a system, a terminal and a medium for automatic sequential control of a heavy gas turbine during double-node synchronization, and the method, the system, the terminal and the medium follow a safe and efficient design concept, pursue artificial intelligence control and save the process that an original heavy gas turbine generator set needs manual HVCB closing after power saving operation. A double-node synchronous grid-connected automatic sequence control method is formed by refining and optimizing process flows, so that the automatic control level of a power plant is increased, the grid-connected time of a unit and a power grid is greatly shortened, the running economy of the unit is improved, and certain labor cost is saved. Therefore, the application effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (9)
1. A heavy-duty combustion engine double-node synchronization grid-connection automatic sequence control method is characterized by comprising the following steps:
after the rotating speed of the gas turbine generator reaches a preset frequency, generating two branches through the on-off state of a motor outlet circuit breaker and a high-voltage circuit breaker;
if the high-voltage circuit breaker and the motor outlet circuit breaker are in an off state, entering a first branch;
if the high-voltage circuit breaker is in a closing state and the generator outlet circuit breaker is in a breaking state, entering a second branch;
and starting an excitation system after the path of the second branch is finished, and closing the motor outlet circuit breaker to finish the sequential starting of the gas turbine.
2. The method for the automatic sequential control of the heavy combustion engine on the two-node synchronous grid connection according to claim 1, characterized in that in the first branch, the following steps are performed:
entering a simultaneous screen-cutting double-side non-pressure mode;
closing a generator outlet circuit breaker;
starting an excitation system;
entering a screen cutting double-side pressure mode at the same time;
and after the operator selects the high-voltage circuit breaker as a synchronization point, the automatic synchronization of the synchronization screen is completed.
3. The method for the automatic sequential control of the heavy-duty combustion engine on the dual-node synchronous grid connection according to claim 1, wherein in the second branch, the excitation system is directly started after the rotation speed of the combustion engine generator reaches a preset frequency.
4. The method for the automatic sequential control of the heavy-duty combustion engine during the two-node synchronization grid connection according to claim 1, characterized in that the preset frequency is set to be above 49 Hz.
5. The utility model provides a heavy combustion engine is at automatic sequential control system of dual node synchronization incorporated into power networks which characterized in that includes:
the branch generation module is used for generating two branches through the on-off state of the motor outlet circuit breaker and the high-voltage circuit breaker after the rotating speed of the gas turbine generator reaches a preset frequency;
the first branch module is used for entering a first branch if the high-voltage circuit breaker and the motor outlet circuit breaker are in an off state;
the second branch module is used for entering a second branch if the high-voltage circuit breaker is in a closing state and the generator outlet circuit breaker is in a breaking state;
and the sequential starting module is used for switching on the motor outlet circuit breaker to complete sequential starting of the gas turbine.
6. The heavy-duty combustion engine grid-connected automatic sequence control system at the same time of two nodes according to claim 5, characterized in that the first branch module is used for executing the following steps: entering a simultaneous screen-cutting double-side non-pressure mode; closing a generator outlet circuit breaker; starting an excitation system; entering a screen cutting double-side pressure mode at the same time; and after the operator selects the high-voltage circuit breaker as a synchronization point, the automatic synchronization of the synchronization screen is completed.
7. The automatic sequential control system for the heavy-duty combustion engine on the dual-node synchronous grid connection is characterized in that the second branch module is used for directly starting the excitation system after the rotating speed of the combustion engine generator reaches a preset frequency.
8. A computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the method for dual node contemporaneous grid connection automatic sequence control of a heavy combustion engine according to any one of claims 1 to 4.
9. An electronic terminal, comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is used for executing the computer program stored in the memory to enable the terminal to execute the method for controlling the heavy combustion engine to perform the dual-node synchronization automatic sequence control method according to any one of claims 1 to 4.
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