CN116025432A - Method and device for starting generator set, storage medium and electronic equipment - Google Patents
Method and device for starting generator set, storage medium and electronic equipment Download PDFInfo
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- CN116025432A CN116025432A CN202211185689.0A CN202211185689A CN116025432A CN 116025432 A CN116025432 A CN 116025432A CN 202211185689 A CN202211185689 A CN 202211185689A CN 116025432 A CN116025432 A CN 116025432A
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Abstract
The disclosure relates to the technical field of power plant boiler production, in particular to a method and a device for starting a generator set, a storage medium and electronic equipment. The method for starting the generator set comprises the following steps: under the condition that a generator set trips, a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of a steam turbine of the generator set are closed; determining whether a shaft seal system of the steam turbine allows steam supply; opening a steam supply valve of an auxiliary steam header of the steam turbine and the high-pressure bypass system under the condition that the shaft seal system allows steam supply; and supplying steam to an auxiliary steam user of the steam turbine through residual pressure in the superheater and residual steam in the reheater so as to enable the generator set to be started under the condition of no standby steam, wherein the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
Description
Technical Field
The disclosure relates to the technical field of power plant boiler production, in particular to a method and a device for starting a generator set, a storage medium and electronic equipment.
Background
When the generator set is started, the steam turbine converts steam heat energy into external combustion rotary machinery with mechanical work, and after entering the steam turbine, the steam sequentially passes through a series of annularly configured nozzles and movable blades to convert the steam heat energy into mechanical energy for rotating a rotor of the steam turbine so as to start the generator set.
Auxiliary steam is needed when the boiler of the large-sized generator set is started, the auxiliary steam is used by the running generator set in normal operation, and when the head generator set of the newly-built power plant is started, as no auxiliary steam is provided by the running machine, an oil-fired starting boiler is often needed to be independently arranged to provide steam to assist the starting of the generator set.
Disclosure of Invention
According to a first aspect of an embodiment of the present disclosure, there is provided a method for starting a generator set, including:
under the condition that a generator set trips, a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of a steam turbine of the generator set are closed;
determining whether a shaft seal system of the steam turbine allows steam supply;
opening a steam supply valve of an auxiliary steam header of the steam turbine and the high-pressure bypass system under the condition that the shaft seal system allows steam supply;
and supplying steam to an auxiliary steam user of the steam turbine through residual pressure in the superheater and residual steam in the reheater so as to enable the generator set to be started under the condition of no standby steam, wherein the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
Optionally, the auxiliary steam user includes a shaft seal system, and the steam supplying device supplies steam for the auxiliary steam user of the steam turbine through residual pressure in the superheater system and residual steam in the reheater, and includes:
opening a regulating gate of a seventh steam extraction pipeline in the steam extraction system;
the auxiliary steam header is used for supplying steam to the shaft seal system through a cold re-pipeline, the seventh steam extraction pipeline and the auxiliary steam header, and residual pressure in the superheater system is regulated through the regulating valve so as to maintain auxiliary coupling pressure and maintain the condenser system of the steam turbine in a vacuum normal state, wherein the auxiliary coupling pressure is used for opening a steam supply door of the auxiliary steam header of the steam turbine.
Optionally, the supplying steam for the shaft seal system through the cold re-pipeline, the seventh steam extraction pipeline and the auxiliary steam header includes:
opening the high pressure bypass system in the event that the residual pressure within the superheater system is unable to maintain the auxiliary pressure;
and providing steam to the reheater system through the high pressure bypass system to maintain the auxiliary coupling pressure through the pressure in the high pressure bypass system and the residual pressure in the reheater system.
Optionally, the auxiliary steam user includes a deaerator heating system, and the steam supplying device supplies steam for the auxiliary steam user of the steam turbine through residual pressure in the superheater system and residual steam in the reheater, and includes:
opening the high pressure bypass system;
redundant hot water in a deaerator and an economizer of the deaerator heating system is controlled to flow into a steam drum and a water cooling wall of a boiler;
heating cold water flowing into the economizer by waste heat in the boiler;
and controlling the boiler to ignite when the water quantity in the steam drum reaches a threshold value of the water quantity in the steam drum.
Optionally, before said controlling the ignition of the boiler, further comprising:
determining whether the condenser system is in a vacuum normal state or not, and determining whether the steam turbine has a starting condition or not;
closing the condenser system when the condenser system is not in a vacuum normal state or the steam turbine does not have the starting condition;
and vacuumizing the steam turbine when the auxiliary coupling pressure reaches an auxiliary coupling pressure threshold value.
Optionally, the auxiliary steam user includes a fuel oil atomization system, and the auxiliary steam user of the steam turbine is supplied with steam through residual pressure in a superheater system and residual steam in a reheater, and the auxiliary steam user comprises:
closing a fuel atomization steam system of the steam turbine, and controlling the steam turbine to exit a fuel atomization pressure low protection mode;
the turbine is started by a micro-oil ignition system of the combustor.
Optionally, the determining whether the shaft seal system of the steam turbine allows steam supply includes:
determining whether the generator set is safely stopped after tripping;
under the condition that the generator set is safely shut down after tripping is determined, determining the tripping reason;
determining whether the trip cause affects the turbine start;
and under the condition that the tripping reason does not influence the starting of the steam turbine, determining that a shaft seal system of the steam turbine allows steam supply.
According to a second aspect of embodiments of the present disclosure, there is provided a generator set starting apparatus, including:
the closing module is used for closing a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of a steam turbine of the generator set under the condition that the generator set trips;
a determining module for determining whether a shaft seal system of the steam turbine allows steam supply;
the opening module is used for opening a steam supply valve of an auxiliary steam header of the steam turbine and the high-pressure bypass system under the condition that the shaft seal system allows steam supply;
the steam supply module is used for supplying steam to auxiliary steam users of the steam turbine through residual pressure in the superheater and residual steam in the reheater so that the generator set can be started under the condition of no standby steam, the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
According to a third aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of any of the first aspects.
According to a fourth aspect of embodiments of the present disclosure, there is provided an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any of the first aspects.
According to the technical scheme, under the condition that the generator set trips and the shaft seal system of the steam turbine allows steam supply, the steam supply valve and the high-pressure bypass system of the auxiliary steam header of the steam turbine are opened, and steam is supplied to an auxiliary steam user of the steam turbine through residual pressure in the high-temperature superheater connected with the high-pressure bypass system and residual steam in the low-temperature reheater connected with the high-pressure bypass system, so that the generator set is started thermally under the condition that no standby steam exists, one set can run safely and stably, and accidents that cannot be started after the unit trips during running are avoided.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a flowchart illustrating a method of genset start-up according to an exemplary embodiment.
FIG. 2 is a schematic diagram illustrating the supply of steam to an auxiliary header system via a high pressure bypass system, according to an exemplary embodiment.
FIG. 3 is a block diagram illustrating a genset starting device, according to an exemplary embodiment.
Fig. 4 is a block diagram of an apparatus according to an example embodiment.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
The inventors have found that in the prior art, the start-up steam used in the steam turbine is derived from a section of steam extraction from a coal power plant, whereas for a power plant not equipped with a start-up boiler, if the coal power plant is shut down, this would result in other power plants communicating with the coal power plant losing standby start-up steam during steam turbine-free operation. For example: when the power grid Meng Xi is completely broken or the quasi-Ning outlet is tripped and the operation of the turbines fails to carry plant power, the starting steam of the four turbines is interrupted, and the problem of no-steam starting of the turbines is solved.
In view of the above, the present disclosure provides a method and apparatus for starting a generator set, a storage medium, and an electronic device, so as to solve the above technical problems.
It should be understood at first that the steam turbine is a power machine using steam as a working medium to convert thermal energy of the steam into mechanical energy for rotation of a rotor, and four main devices of the industrial steam turbine apparatus include a boiler, a steam turbine, a condenser, and a feed pump.
A boiler is a device for generating high-temperature and high-pressure steam, and water is changed into high-temperature and high-pressure steam after absorbing heat generated when fuel (such as coal, fuel oil or natural gas) is burned in the boiler. The superheater is used for continuously heating saturated steam sent out from the boiler steam drum, and increasing the temperature of the steam under the original pressure to become superheated steam. The steam turbine is a device for working externally by utilizing steam, and after high-temperature and high-pressure superheated steam from the superheater flows through the steam turbine, the temperature and the pressure are reduced, an expansion working process is generated, the heat energy of the steam is converted into mechanical work, and the mechanical work is output by the shaft end of the steam turbine and is used for driving a compressor, a pump, a generator and the like. The condenser is also called a condenser and is a low-temperature heat release source of working medium in the condensing steam turbine. The steam which is done work in the steam turbine is discharged into the condenser, latent heat of vaporization is released to cooling water under a certain pressure, the steam is condensed into water, and vacuum in the condenser is formed. The condensed water is pumped by a condensate pump and is pumped back to the boiler by a water supply pump to be used as boiler water supply. The feed pump is used for consuming a part of power to complete the compression process in the thermodynamic cycle, and the pressure of the condensed water is increased and fed into the boiler.
There are three closed circuits in the turbine unit. The first circuit is a steam-water circuit, which is a main circuit in a steam turbine plant. The water absorbs heat generated when the fuel burns in the boiler and becomes high-temperature and high-pressure steam. The steam turbine converts a part of energy in the high-temperature and high-pressure steam into mechanical work, outputs the mechanical work to the outside, discharges the steam into a condenser after the pressure and the temperature of the steam are reduced, is condensed into water by cooling water, and is pressurized by a boiler feed pump to be fed into a boiler. Thus, a closed loop is formed by the boiler, the steam turbine, the condenser and the water feeding pump, and the working medium continuously changes water into steam in the closed loop. The second loop is an air smoke loop, the air enters the boiler and generates combustion process together with fuel to become smoke, and the high-temperature smoke transfers part of heat into water and steam in the boiler, then the temperature is reduced, and the smoke is discharged into the atmosphere through a chimney. At the same time, fresh air is continuously fed into the boiler to participate in combustion. The third loop is a cooling water loop, cooling water is pressurized by a cooling water tank or a cooling tower through a cooling water pump and enters a condenser, after the latent heat of vaporization of exhaust gas is absorbed in the condenser, the temperature of the cooling water is increased, and the cooling water is discharged into the cooling water tank for cooling, so that a closed loop is formed.
FIG. 1 is a method of starting a genset, according to an exemplary embodiment, including the steps of:
in step S101, in case of a trip of the generator set, the high pressure bypass system, the low pressure bypass system, the drainage system and the steam extraction system of the turbine of the generator set are turned off.
In step S102, it is determined whether the shaft seal system of the steam turbine allows steam supply.
In step S103, in case the shaft seal system allows steam supply, the steam supply valve of the auxiliary steam header of the steam turbine and the high pressure bypass system are opened.
In step S104, steam is supplied to an auxiliary steam user of the steam turbine through residual pressure in the superheater and residual steam in the reheater, so that the generator set is started up under the condition of no standby steam, wherein the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
It should be understood that each boiler is provided with an auxiliary steam header, and during normal operation, the auxiliary steam headers are connected in series through connecting pipes, and the auxiliary steam header steam source of each boiler is supplied by the high-pressure cylinder steam exhaust of the steam turbine. In actual operation, the pressure of the auxiliary steam header is 1.3MPa, the temperature is 250-350 ℃, and steam is sent to each auxiliary steam user through the auxiliary steam header. After the steam turbine trips, the auxiliary steam header is closed together with other systems in the steam turbine.
The volume of the boiler reheater is 116m 3 The normal operation load range of the generator set is 165MW to 330MW, the corresponding reheat steam pressure is 2.0MPa to 4.1MPa, if the generator set trips in operation, a large amount of steam is accumulated in the reheaterThe auxiliary steam header steam supply valve can be opened to supply auxiliary continuous steam for auxiliary connection. The normal operation load range of the generator set is 165MW to 330MW, the corresponding main steam pressure of the boiler is 10.4MPa to 18.2MPa, the pressure retention in the superheater before tripping of the boiler is greater than 10.4MPa, the bypass system is arranged in a two-stage bypass mode, the high-pressure bypass system is connected with the high-temperature superheater and the low-temperature reheater system, and the low-pressure bypass system is connected with the high-temperature reheater and the condenser system. Because the steam supply of the auxiliary steam header is just taken from the high-pressure cylinder steam exhaust, namely the low-temperature reheater, after the generator set trips, residual pressure of the superheater system can be utilized, waste heat steam is sent into the auxiliary steam header through a high-pressure bypass system of the steam turbine, a high-pressure cylinder steam exhaust pipeline and a B7 section steam extraction pipeline in a steam extraction system, and then important auxiliary steam users of the steam turbine are supplied with steam through the auxiliary steam header.
For example, since redundant steam and residual pressure exist in each system and each pipeline of the steam turbine after the generator set trips, the redundant steam and residual pressure are utilized to supply steam for auxiliary steam users of the steam turbine, so that the generator set is started up under the condition of no standby steam, and therefore, a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of the steam turbine can be shut down under the condition of tripping the generator set, so that the redundant steam and residual pressure are prevented from being lost.
According to the technical scheme, under the condition that the generator set trips and the shaft seal system of the steam turbine allows steam supply, the steam supply valve and the high-pressure bypass system of the auxiliary steam header of the steam turbine are opened, and steam is supplied to an auxiliary steam user of the steam turbine through residual pressure in the high-temperature superheater connected with the high-pressure bypass system and residual steam in the low-temperature reheater connected with the high-pressure bypass system, so that the generator set is started thermally under the condition that no standby steam exists, one set can run safely and stably, and accidents that cannot be started after the unit trips during running are avoided.
In a possible way, determining whether the shaft seal system of the steam turbine allows steam supply may be: firstly, determining whether the generator set is safely stopped after tripping, determining a tripping reason under the condition that the generator set is safely stopped after tripping, then determining whether the tripping reason affects the starting of the generator set, and determining that a shaft seal system of a steam turbine allows steam supply under the condition that the tripping reason does not affect the starting of a steam turbine.
It should be appreciated that there are various reasons for the generator set to trip, and some reasons may affect the restarting of the steam turbine, so that in the case of determining that the generator set is safely shut down after tripping, the tripping reason and whether the tripping reason affects the restarting of the generator set after tripping can be determined first, and in the case that the tripping reason does not affect the starting of the generator set, the shaft seal system of the steam turbine is determined to allow steam supply.
In a possible mode, the auxiliary steam user comprises a shaft seal system, the auxiliary steam user of the steam turbine is supplied with steam by the residual pressure in the superheater system and the residual steam in the reheater, the valve of a seventh steam extraction pipeline in the steam extraction system is opened, then the steam is supplied for the shaft seal system by the cold re-pipeline, the seventh steam extraction pipeline and the auxiliary steam header, the residual pressure in the superheater system is regulated by the valve so as to maintain the auxiliary coupling pressure, the condenser system of the steam turbine is maintained in a vacuum normal state, and the auxiliary coupling pressure is used for opening the steam supply valve of the auxiliary steam header of the steam turbine.
It should be understood that turbine shaft seal system investment is required before the generator set is ignited, condenser vacuum is established, and shaft seal investment and vacuum establishment are required before the generator set is started in a hot state. Meanwhile, when the generator set trips, continuous supply of shaft seal steam must be ensured, otherwise, vacuum damage to the condenser is caused. Therefore, after the generator set is tripped, the steam turbine side can utilize steam to continuously supply steam to the shaft seal system, so that the normal vacuum of the condenser is ensured. Therefore, the auxiliary steam header steam is adopted to supply the shaft seal system in the starting process of the generator set to seal the high, medium and low pressure cylinders of the steam turbine.
For example, all unnecessary users connected to the auxiliary steam header may be cut off, and the auxiliary steam header may preferentially retain the turbine shaft seal supply steam to maintain condenser vacuum. Of course, it is also possible to determine which auxiliary steam users are specifically reserved according to the auxiliary coupling pressure, which is not limited by the embodiment of the present disclosure.
The seventh steam extraction pipeline may be a B7-section steam extraction pipeline of the steam extraction system, after the generator set trips, if the shaft seal is allowed to supply steam, a valve of the B7-section steam extraction pipeline may be forcibly opened, as shown by a thick line in fig. 2, the reheater system supplies steam to the auxiliary steam header through a cold re-pipeline and the B7-section steam extraction pipeline, and residual pressure in the valve-regulated superheater system of the B7-section steam extraction pipeline is used to maintain auxiliary coupling pressure, so as to avoid insufficient steam supply pressure of the shaft seal system, and when the auxiliary coupling pressure reaches above 1.0MPa, the steam supply to the shaft seal of the turbine may be restarted.
For example, the minimum opening of the low pressure bypass system may be forced before the high pressure bypass system is turned on, preventing the residual pressure within the reheater system from being vented after the low pressure bypass system is turned on. In addition, after the high-pressure bypass system is started, the valve back temperature set value of the high-pressure bypass system can be improved to about 280 ℃, and the condition that the auxiliary steam provided by the auxiliary steam header is carried with water due to low steam supply temperature after the high-pressure bypass system is started is prevented.
In a possible manner, the supplying of steam to the shaft seal system through the cold re-conduit, the seventh steam extraction conduit and the auxiliary steam header may be to open the high pressure bypass system and then supply steam to the reheater system through the high pressure bypass system to maintain the auxiliary coupling pressure through the pressure in the high pressure bypass system and the residual pressure in the reheater system in the event that the residual pressure in the superheater system cannot maintain the auxiliary coupling pressure.
For example, when the residual pressure in the reheater system cannot meet the auxiliary pressure requirement, the high-pressure bypass system may be opened to supply steam to the reheater system according to the actual auxiliary pressure requirement, so as to maintain the auxiliary pressure through the pressure in the high-pressure bypass system and the residual pressure in the reheater system. The pressure rising speed of the reheater system can be guaranteed to be smaller than or equal to 0.1MPa/min, the pressure falling speed of the superheater is guaranteed to be smaller than or equal to 0.1MPa/min, and unstable steam supply caused by overlarge pressure rising speed is prevented.
In a possible mode, the auxiliary steam user comprises a deaerator heating system, the auxiliary steam user of the steam turbine can be provided with a high-pressure bypass system by residual pressure in the superheater system and residual steam in the reheater, redundant hot water in the deaerator and the economizer of the deaerator heating system is controlled to flow into a steam drum and a water cooling wall of the boiler, cold water flowing into the economizer is heated by waste heat in the boiler, and when the water quantity in the steam drum reaches a water quantity threshold of the steam drum, the boiler is controlled to ignite.
It should be appreciated that during the start-up of the generator set, boiler feed water may be heated to ensure that the steam drum upper and lower wall temperature differential is within a specified range. After the generator set trips, the heat of the hearth instantaneously disappears, and the volume of the steam-water mixture in the water cooling wall rapidly contracts, so that the steam drum instantaneously lacks water. For example, the effective volume of the deaerator is 150m 3 The boiler can be provided with 100m 3 The water feeding amount and the normal water volume of the economizer are 68.4m 3 After the boiler trips, redundant hot water in the deaerator and the economizer can slowly gradually push into the steam drum and the water cooling wall through the water supply pump, and cold water newly flowing into the economizer can heat the boiler by utilizing the waste heat of the boiler, so that the problem of overlarge temperature difference of the steam drum wall is effectively avoided. When the drum water of the boiler reaches the drum water quantity threshold value, the safe ignition of the boiler can be realized. The drum water volume threshold may be 150 millimeters below the drum centerline, which is not limiting on embodiments of the present disclosure.
In a possible mode, before the ignition of the boiler is controlled, whether the condenser system is in a vacuum normal state or not can be determined, whether the steam turbine has a starting condition or not can be determined, the condenser system is closed under the condition that the condenser system is not in the vacuum normal state or the steam turbine does not have the starting condition, and when the auxiliary coupling pressure reaches an auxiliary coupling pressure threshold value, the steam turbine is vacuumized.
It should be understood that when the generator set is started, the steam turbine needs to have starting conditions, that is, the main steam system, the steam extraction system and the drainage system of the steam turbine, the heater and the drainage system of the heater, the main condensate system, the circulating water system, the oil system, the regulation security system and the like of the steam turbine are in a normal state before the set is started. Accordingly, the starting conditions may be determined according to the operation principle and the operation state of each system of the steam turbine, and the embodiment of the present disclosure is not limited thereto. In addition, after the steam turbine is vacuumized, the exhaust pressure and temperature are reduced, so that the pressure difference is increased, the temperature drop is increased, the enthalpy difference between an inlet and an outlet is further increased, the output of the steam turbine is increased, the acting is increased, the steam heat energy utilization efficiency can be improved, and the quality of condensate is improved. Therefore, before the ignition of the boiler is controlled, whether the condenser system is in a vacuum normal state or not can be determined, and whether the steam turbine has a starting condition or not can be determined.
By way of example, the condenser system may be turned off when the condenser system is not in a vacuum normal state or the steam turbine does not have a start condition, hot water steam entering the condenser system is cut off, and when the auxiliary coupling pressure reaches 1.0MPa, the steam turbine is evacuated. Under the condition that the condenser system is in a vacuum normal state and the steam turbine has a starting condition, the boiler can be started by rapid ignition according to the requirement of a boiler thermal state starting operation ticket. It should be appreciated that a boiler operating self-contained auxiliary steam start-up procedure is a general procedure in the prior art, and embodiments of the present disclosure are not specifically described herein.
In a possible mode, the auxiliary steam user comprises a fuel oil atomization system, the auxiliary steam user for the steam turbine can be a fuel oil atomization steam system for closing the steam turbine through residual pressure in the superheater system and residual steam in the reheater, the steam turbine is controlled to exit from a fuel oil atomization pressure low protection mode, and the steam turbine is started through a micro-oil ignition system of the combustor.
It should be understood that each turbine in the prior art can be provided with 20 cyclone combustors, each combustor is provided with 1 large oil gun with 600L/h oil consumption, the oil gun adopts a steam atomization mode for fuel atomization, and the steam pressure required by the fuel atomization is more than 1.0 MPa.
For example, in order to start the steam turbine under the condition of no standby steam, the micro-oil ignition system is additionally arranged on the two rows of lower-layer combustors, compressed air is adopted for fuel oil atomization of micro-oil ignition, when the boiler is started in a hot state (the primary air temperature of the outlet of the air preheater before ignition is greater than 150 ℃), the boiler side does not need to start steam any more, so that after the whole unit trips, and the primary air temperature of the outlet of the air preheater before ignition is greater than 150 ℃), all steam users can be cut off on the boiler side, and the hot state starting without standby steam is realized. In addition, when the steam turbine can be started in a micro-oil ignition mode, the fuel atomization steam can be cut off, and the low-pressure protection of the fuel atomization steam can be exited.
By adopting the technical scheme, the auxiliary steam header is isolated through the shutdown of the fourth unit, the unit no-standby steam starting test is performed, and the process and test parameters are as follows:
under the condition that the fourth generator set is safely stopped and the restarting of the generator set is not affected, B7 is manually opened to an auxiliary steam header steam supply electric door and an adjusting door, the pressure of the auxiliary steam header is adjusted to 1.2MPa, a high-pressure bypass system is manually opened to supply steam to the reheater by 5%, and the normal steam supply of a shaft seal and normal vacuum are observed. After the purging of the boiler is completed, the primary air blower A is started, the sealing air blower A is started, the D layer micro-oil gun is successfully ignited, the D coal mill is started to catch fire normally, the main steam pressure of the boiler is raised back, the parameters of unit vacuum, steam drum wall temperature difference and the like are normal, and no steam is started successfully.
During the period that the heater system supplies steam to the auxiliary steam header, the steam pressure is reduced from 1.76MPa to 1.14MPa, the time is 10 minutes, the early steam supply to the auxiliary steam header is realized, the ignition is successful until the boiler is started after the high-pressure bypass system is started, the main steam pressure is reduced from 6.68MPa to 5.47MPa, the pressure drop is 1.21MPa, and the duration is 32 minutes.
Fig. 3 is a block diagram illustrating a genset starting device 300 according to an exemplary embodiment. Referring to fig. 3, the apparatus includes a closing module 301, a determining module 302, an opening module 303, and a steam supply module 304.
A closing module 301, configured to close a high-pressure bypass system, a low-pressure bypass system, a drainage system, and a steam extraction system of the steam turbine in case of tripping of the generator set;
a determination module 302 for determining whether a shaft seal system of the steam turbine allows steam supply;
an opening module 303, configured to open a steam supply valve and a high-pressure bypass system of an auxiliary steam header of the steam turbine in a case where the shaft seal system allows steam supply;
the steam supply module 304 is configured to supply steam to an auxiliary steam user of the steam turbine through residual pressure in the superheater and residual steam in the reheater, so that the generator set is started thermally without standby steam, the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
Optionally, the auxiliary steam user includes a shaft seal system, and the steam supply module 304 is configured to:
opening a regulating gate of a seventh steam extraction pipeline in the steam extraction system;
the auxiliary steam header is used for supplying steam for the shaft seal system through the cold re-pipeline, the seventh steam extraction pipeline and the auxiliary steam header, and residual pressure in the superheater system is regulated through the regulating valve so as to maintain auxiliary coupling pressure and maintain the condenser system of the steam turbine in a vacuum normal state, and the auxiliary coupling pressure is used for opening a steam supply valve of the auxiliary steam header of the steam turbine.
Optionally, the steam supply module 304 is configured to:
opening the high pressure bypass system in the event that the residual pressure within the superheater system is unable to maintain the auxiliary pressure;
the reheater system is supplied with steam via the high pressure bypass system to maintain an auxiliary pressure via a pressure within the high pressure bypass system and a residual pressure within the reheater system.
Optionally, the steam supply module 304 is configured to:
opening the high pressure bypass system;
redundant hot water in a deaerator and an economizer of a deaerator heating system is controlled to flow into a steam drum and a water cooling wall of a boiler;
the cold water flowing into the economizer is heated by the waste heat in the boiler;
when the water quantity in the steam drum reaches the threshold value of the water quantity in the steam drum, the ignition of the boiler is controlled.
Optionally, the steam supply module 304 is configured to:
before controlling the ignition of the boiler, determining whether the condenser system is in a vacuum normal state or not, and determining whether the steam turbine has a starting condition or not;
closing the condenser system under the condition that the condenser system is not in a vacuum normal state or the steam turbine does not have a starting condition;
and vacuumizing the steam turbine when the auxiliary coupling pressure reaches an auxiliary coupling pressure threshold value.
Optionally, the auxiliary steam user includes a fuel atomization system, and the steam supply module 304 is configured to:
closing a fuel atomization steam system of the steam turbine, and controlling the steam turbine to exit from a fuel atomization pressure low protection mode;
the turbine is started by a micro-oil ignition system of the combustor.
Optionally, the determining module 302 is configured to:
determining whether the generator set is safely stopped after tripping;
under the condition that the safe shutdown of the generator set is determined after tripping, determining a tripping reason;
determining whether a trip cause affects turbine start-up;
and under the condition that the tripping reason does not influence the starting of the steam turbine, determining that the shaft seal system of the steam turbine allows steam supply.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Based on the same inventive concept, the embodiments of the present disclosure also provide a non-transitory computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the genset starting method provided by the present disclosure.
Fig. 4 is a block diagram of an electronic device 400, shown in accordance with an exemplary embodiment. As shown in fig. 4, the electronic device 400 may include: a processor 401, a memory 402. The electronic device 400 may also include one or more of a multimedia component 403, an input/output (I/O) interface 404, and a communication component 405.
Wherein the processor 401 is configured to control the overall operation of the electronic device 400 to perform all or part of the steps in the method for starting a generator set described above. The memory 402 is used to store various types of data to support operation at the electronic device 400, which may include, for example, instructions for any application or method operating on the electronic device 400, as well as application-related data, such as contact data, transceived messages, pictures, audio, video, and the like. The Memory 402 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia component 403 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 402 or transmitted through the communication component 405. The audio assembly further comprises at least one speaker for outputting audio signals. The I/O interface 404 provides an interface between the processor 401 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other electronic devices. Wireless communication, such as Wi-Fi, bluetooth, near field communication (Near Field Communication, NFC for short), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or one or a combination of more of them, is not limited herein. The corresponding communication component 405 may thus comprise: wi-Fi module, bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), digital signal processors (Digital Signal Processor, abbreviated as DSP), digital signal processing devices (Digital Signal Processing Device, abbreviated as DSPD), programmable logic devices (Programmable Logic Device, abbreviated as PLD), field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described genset start-up method.
In another exemplary embodiment, a computer readable medium is also provided comprising program instructions which, when executed by a processor, implement the steps of the genset start-up method described above. For example, the computer readable medium may be the memory 402 including program instructions described above, which are executable by the processor 401 of the electronic device 400 to perform the genset start-up method described above.
In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described genset starting method when executed by the programmable apparatus.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A method of starting a generator set, comprising:
under the condition that a generator set trips, a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of a steam turbine of the generator set are closed;
determining whether a shaft seal system of the steam turbine allows steam supply;
opening a steam supply valve of an auxiliary steam header of the steam turbine and the high-pressure bypass system under the condition that the shaft seal system allows steam supply;
and supplying steam to an auxiliary steam user of the steam turbine through residual pressure in the superheater and residual steam in the reheater so as to enable the generator set to be started under the condition of no standby steam, wherein the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
2. The method of claim 1, wherein the auxiliary steam consumer comprises a shaft seal system, the supplying steam to the auxiliary steam consumer of the steam turbine via residual pressure in a superheater system and residual steam in a reheater, comprising:
opening a regulating gate of a seventh steam extraction pipeline in the steam extraction system;
the auxiliary steam header is used for supplying steam to the shaft seal system through a cold re-pipeline, the seventh steam extraction pipeline and the auxiliary steam header, and residual pressure in the superheater system is regulated through the regulating valve so as to maintain auxiliary coupling pressure and maintain the condenser system of the steam turbine in a vacuum normal state, wherein the auxiliary coupling pressure is used for opening a steam supply door of the auxiliary steam header of the steam turbine.
3. The method of claim 2, wherein said providing steam to said shaft seal system through said cold re-conduit, said seventh steam extraction conduit, and said auxiliary steam header comprises:
opening the high pressure bypass system in the event that the residual pressure within the superheater system is unable to maintain the auxiliary pressure;
and providing steam to the reheater system through the high pressure bypass system to maintain the auxiliary coupling pressure through the pressure in the high pressure bypass system and the residual pressure in the reheater system.
4. The method of claim 2, wherein the auxiliary steam consumer comprises a deaerator heating system, the supplying steam to the auxiliary steam consumer of the steam turbine via residual pressure in the superheater system and residual steam in the reheater, comprising:
opening the high pressure bypass system;
redundant hot water in a deaerator and an economizer of the deaerator heating system is controlled to flow into a steam drum and a water cooling wall of a boiler;
heating cold water flowing into the economizer by waste heat in the boiler;
and controlling the boiler to ignite when the water quantity in the steam drum reaches a threshold value of the water quantity in the steam drum.
5. The method of claim 4, further comprising, prior to said controlling said boiler firing:
determining whether the condenser system is in a vacuum normal state or not, and determining whether the steam turbine has a starting condition or not;
closing the condenser system when the condenser system is not in a vacuum normal state or the steam turbine does not have the starting condition;
and vacuumizing the steam turbine when the auxiliary coupling pressure reaches an auxiliary coupling pressure threshold value.
6. The method of claim 1, wherein the auxiliary steam consumer comprises a fuel atomization system, the auxiliary steam consumer of the steam turbine being supplied with steam via residual pressure in a superheater system and residual steam in a reheater, comprising:
closing a fuel atomization steam system of the steam turbine, and controlling the steam turbine to exit a fuel atomization pressure low protection mode;
the turbine is started by a micro-oil ignition system of the combustor.
7. The method of claim 1, wherein the determining whether the shaft seal system of the steam turbine allows steam supply comprises:
determining whether the generator set is safely stopped after tripping;
under the condition that the generator set is safely shut down after tripping is determined, determining the tripping reason;
determining whether the trip cause affects the turbine start;
and under the condition that the tripping reason does not influence the starting of the steam turbine, determining that a shaft seal system of the steam turbine allows steam supply.
8. A generator set starting apparatus, comprising:
the closing module is used for closing a high-pressure bypass system, a low-pressure bypass system, a drainage system and a steam extraction system of a steam turbine of the generator set under the condition that the generator set trips;
a determining module for determining whether a shaft seal system of the steam turbine allows steam supply;
the opening module is used for opening a steam supply valve of an auxiliary steam header of the steam turbine and the high-pressure bypass system under the condition that the shaft seal system allows steam supply;
the steam supply module is used for supplying steam to auxiliary steam users of the steam turbine through residual pressure in the superheater and residual steam in the reheater so that the generator set can be started under the condition of no standby steam, the superheater is a high-temperature superheater connected with the high-pressure bypass system, and the reheater is a low-temperature reheater connected with the high-pressure bypass system.
9. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor realizes the steps of the method according to any of claims 1-7.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any one of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211185689.0A CN116025432A (en) | 2022-09-27 | 2022-09-27 | Method and device for starting generator set, storage medium and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211185689.0A CN116025432A (en) | 2022-09-27 | 2022-09-27 | Method and device for starting generator set, storage medium and electronic equipment |
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| CN116025432A true CN116025432A (en) | 2023-04-28 |
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| CN202211185689.0A Pending CN116025432A (en) | 2022-09-27 | 2022-09-27 | Method and device for starting generator set, storage medium and electronic equipment |
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| Country | Link |
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| CN (1) | CN116025432A (en) |
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- 2022-09-27 CN CN202211185689.0A patent/CN116025432A/en active Pending
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