KR101794434B1

KR101794434B1 - Method for driving a feed water system of a boiler of a plant by using Run-to-Min Priority, and a computer program therefor

Info

Publication number: KR101794434B1
Application number: KR1020160000834A
Authority: KR
Inventors: 맹좌영; 이현익
Original assignee: 두산중공업 주식회사
Priority date: 2016-01-05
Filing date: 2016-01-05
Publication date: 2017-11-06
Also published as: KR20170081864A

Abstract

The present invention relates to controlling a water supply system of a thermal power plant, and is an invention for controlling priority of load dropout to automatically adjust a load in a sub-system of FW Master.
According to the present invention, a method for operating a water supply system of a power plant boiler at an initial start-up is disclosed, the water supply system comprising one BFPM and two BFPTs, the method comprising: starting a BFPM start sequence S440); And S450 turning on the BFPM parallel mode in the BFPM parallel mode, wherein the first order of priority of load dropout is a second BFPT, the second order is a first BFPT, , And the third order is the BFPM.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a computer program for operating a water supply system of a power plant boiler using a load dropout priority,

The present invention relates to controlling a water supply system of a thermal power plant, and is an invention for controlling priority of load dropout to automatically adjust a load in a sub-system of FW Master.

1 is a view showing a configuration of a general thermal power plant.

The thermal power plant consists of a boiler and a turbine, and is the highest level controller to control it. It includes a boiler main controller and a turbine main controller. The boiler main controller and the turbine main controller are collectively referred to as a unit main controller. The boiler main controller delivers the upper control signal to each main controller that controls the air, fuel and water supply required in the boiler.

The feedwater is used to generate steam that rotates the turbine, which controls the boiler to have the proper pressure and temperature to create the mechanical torque of the generator that is appropriate for the power demand of the power plant. When the outlet steam pressure of the boiler final superheater changes with the actual output power change of the generator, the fuel amount changes by the fuel controller depending on the boiler steam pressure. When the fuel amount changes, the amount of combustion air is changed by the air main controller, and the feed water flow rate is changed by the water main controller. At this time, the feedwater flow is subjected to feedforward control for the relevant disturbance for rapid and active control.

The feed pump consists of a total of three feed pumps, specifically a single motor-driven boiler feedwater pump (BFPM) and two turbine-driven boiler feed pumps (BFPT: Boiler Feedwater Pump by Turbine )to be. The two BFPTs may be classified into Primary BFPT and Secondary BFPT, and may be classified into BFPT-A and BFPT-B. Generally, BFPM is used for starting in wet mode with less than 30% load in the entire 100% load of the boiler, and two BFPTs in 30% to 100% dry-mode. That is, the boiler feedwater is driven from the BFPM in the wet mode, but the BFPM is dropped from the dry mode which is 30%.

Such conventional operating modes have many problems. For example, in the case of a thermal power boiler of 1000 MW class, the load of burden becomes large to meet the supply water flow rate at start-up only by BFPM. In addition, in the case of 100% load of two BFPTs, there is a great possibility that unexpected situations arise due to high load sharing ratio of each BFPT in a situation where one BFPT is tripped / maintained.

In order to solve the above problems, the present invention intends to extend the operation mode of the BFPM, which is limited only to the start mode and the wet mode, to all areas of the load. To this end, the present invention proposes a new "BFPM Parallel Mode" (BFPM parallel mode) which has not been introduced previously. BFPM Parallel Mode enables the BFPM to be driven in parallel with two BFPTs, even in dry mode, without being loaded-dropped.

Specifically, when the BFPM Parallel Mode is OFF, the same concept as that of the conventional feed pump operation is performed. The BFPM is driven only at the initial startup and in the wet mode, and the load is dropped in the dry mode. However, when BFPM Parallel Mode is ON, the BFPT is given priority to drop the load by the Minimum Load. As a result, the BFPM is driven in parallel with the BFPT without dropping the load.

According to an embodiment of the present invention, there is provided a method for operating a water supply system of a power plant boiler at an initial start-up, the water supply system including one BFPM and two BFPTs, : Starting the BFPM start sequence (S440); And S450 turning on the BFPM parallel mode in the BFPM parallel mode, wherein the first order of priority of load dropout is a second BFPT, the second order is a first BFPT, And a third order is the BFPM. A method for operating a water supply system of a power plant boiler at an initial start-up is disclosed.

The method includes: initiating a first BFPT start sequence (S460); And an M-T parallel step (S470) in which the BFPM and the first BFPT are operated in parallel.

In the MT parallel step S470, the first BFPT is switched from the stop state to the load drop state, the balancing of the first BFPT is performed as the load of the power plant is increased, and the water supply discharge from the first BFPT is added And the load of the power plant is further raised.

According to an embodiment of the present invention, there is provided a method for operating a water supply system of a power plant boiler at a full start, the water supply system including one BFPM and two BFPTs, : Starting the BFPM start sequence (S510); And a step S515 of turning ON the BFPM parallel mode in the BFPM parallel mode, wherein the first priority of the load dropout priority is the second BFPT, the second priority is the first BFPT, And a third order is the BFPM. A method for operating a water supply system of a power plant boiler at full startup is disclosed.

The method may further include: an M-2T parallel step (S520) in which the BFPM and the two BFPTs are operated in parallel, and balancing of the BFPM is performed in the M-2T parallel step (S520) .

The method may include: an M-T parallel step (S530) in which the BFPM and the first BFPT are operated in parallel as the load of the power plant decreases; And starting the second BFPT stop sequence (S535). In the M-T parallel step (S530), as the load of the power plant decreases, the load of the second BFPT is dropped.

The method includes: initiating a start sequence to start the second BFPT start sequence (S540); 2T parallel step S550 in which the BFPM and the two BFPTs are operated in parallel as the load of the power plant is increased. In the M-2T parallel step S550, And balancing of the second BFPT is performed.

The method includes: (S555) deactivating (Off) the BFPM parallel mode; And a 2T parallel step (S560) in which the two BFPTs are operated in parallel in accordance with the drop of the load of the BFPM.

According to an embodiment of the present invention, there is provided a computer program stored and executed in a computing device for operating at a time of initial startup a water supply system of a power plant boiler, wherein the water supply system comprises one BFPM and two BFPMs BFPT, the computer program comprising: instructions for starting (S440) the BFPM start sequence; And a BFPM parallel mode (S450), wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT, a second order is a first BFPT, and a third order is a BFPM A computer program that is stored and executed in a computing device to operate a water supply system of a power plant boiler at an initial startup.

The computer program comprising: instructions for starting (S460) a first BFPT start sequence; And an MT parallel step S470 in which the BFPM and the first BFPT are operated in parallel.

According to an embodiment of the present invention, there is provided a computer program stored and executed in a computing device for operating a water supply system of a power plant boiler at a full startup, the system comprising: a BFPM, BFPT, the computer program comprising: instructions for starting (S510) the BFPM start sequence; And activating (S515) the BFPM Parallel Mode, wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT, a second order is a first BFPT, and a third order is a BFPM A computer program that is stored and executed in a computing device to operate a water supply system of a power plant boiler at full startup is disclosed.

The computer program further comprises instructions for an M-2T parallel step (S520) in which the BFPM and the two BFPTs are operated in parallel, wherein the balancing of the BFPM is performed in the M-2T parallel step (S520) .

The computer program comprising: instructions for an M-T parallel step (S530) in which the BFPM and the first BFPT are operated in parallel as the load of the power plant decreases; And instructions for starting the second BFPT stop sequence (S535), wherein the second BFPT is unloaded as the power plant load decreases in the M-T parallel step (S530).

The computer program comprising: instructions for starting (S540) the second BFPT start sequence; And an M-2T parallel step (S550) in which the BFPM and the two BFPTs operate in parallel as the load of the power plant rises, wherein the load of the power plant in the M-2T parallel step (S550) The balancing of the second BFPT is performed.

The computer program comprising: instructions for deactivating the BFPM parallel mode (S555); And a 2T parallel step (S560) in which the two BFPTs are operated in parallel in accordance with a drop in load of the BFPM.

According to the present invention, the concept of conventional BFPM operation limited to the Wet Mode is extended to all the load regions.

According to the present invention, the load sharing ratio of BFP (Boiler Feedwater Pumps) can be lowered.

According to the present invention, since only the ON / OFF of the BFPM Parallel Mode is controlled in driving the boiler system by the driver of the boiler system, malfunction caused by an inexperienced driver can be minimized.

1 is a view showing a configuration of a general thermal power plant.
2 is a diagram showing a schematic configuration of a general unit main processor algorithm.
3 is a diagram for explaining BFPM Parallel Mode according to the present invention.
4 is a view for explaining an embodiment of a water supply operation according to the BFPM parallel mode of the present invention.
Fig. 5 is a diagram for explaining the procedure in the embodiment of Fig. 4. Fig.
FIG. 6 is a diagram for explaining another embodiment of the water supply operation according to the BFPM parallel mode of the present invention.
Fig. 7 is a diagram for explaining the procedure in the embodiment of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Various aspects of the invention are described below. It is to be understood that the inventions set forth herein may be embodied in a wide variety of forms and that any particular structure, function, or all of the presented features are illustrative only. It will be understood by those skilled in the art that on the basis of the inventions set forth herein, one aspect disclosed herein may be implemented independently of any other aspects, and that two or more such aspects may be implemented in various ways &Lt; / RTI > For example, an apparatus may be implemented or a method may be practiced using any number of aspects set forth herein. In addition, or in addition to one or more aspects described herein, or with the aid of structures, functions, or structures and functions other than these aspects, such devices may be implemented or such methods may be practiced.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

The terms " user ", "operator "," driver ", and the like in the present specification may include a subject capable of operating a part of the constitution of the present invention, and these words may be used in combination according to an embodiment.

In order to facilitate the understanding of the present invention, the command delivery system of the main controller of the unit will be described first with reference to FIG.

2 is a diagram showing a schematic configuration of a general unit main processor algorithm. The unit main word algorithm is an upper algorithm of the series control algorithm. The highest level signal for controlling the generator output of the power plant is an Automatic Diapatch Signal (ADS) received from an authority over the entire power system. In some cases, in addition to the ADS, the operator may directly input the power request signal. According to the power demand signal, a main signal for operating and controlling the boiler and the turbine of the power plant is generated, and the main subject of the generation is the boiler master and the turbine master. The turbine control unit and the boiler control unit cooperate with each other to maintain the generator output and the boiler pressure. The main controller of the boiler is the upper signal of the fuel master (Coal Master), the air master (Air Master), and the water main controller (FW Master). In the present invention, Run to min).

3 is a diagram for explaining BFPM Parallel Mode according to the present invention.

Typically, BFPTs used in power plants can handle loads up to about 60% each, and BFPM can handle loads up to about 30%. In other words, BFPM is about half the discharge capacity of BFPT. This is due to the characteristics of BFPM driven by electricity and BFPT driven by turbine. Therefore, when all three pumps operate according to the same command (demand from the FW master), the BFPM can not discharge the water. BFPMs that fail to discharge automatically automatically run to mininum. Specifically, when the BFPM is switched to a load dropout, the BFPM is not stopped immediately but the valve (FCV: Flow Control Valve) for protecting the pump BFPM is opened. When the FCV is opened, the BFPM is driven but the steam from the drive is not discharged to the boiler, but circulates through the FCV, thereby protecting the BFPM. As a result, at full startup (100% load) after initial startup, only two BFPTs participate in the water supply (2T Parallel) and BFPM does not participate in the water supply, which means that all three pumps are not operated in parallel .

For example, in the case of an initial startup that increases from a 0% load to a 100% load, the BFPM initially runs, but during the interval between 15% and 30%, the BFPM is dropped and the BFPT starts running . That is, M-T Transfer occurs. Then, when the load reaches about 40% load, the remaining one BFPT starts to be driven, resulting in driving two BFPTs and going up to 100% load (2T Parallel).

Due to this fact, the power plants to date have had the highest priority to drop BFPMs, and no idea has been attempted to increase the dropout priority of BFPTs over BFPMs. However, the present invention proposes an idea of resetting the priority of dropping the load of BFPM to be lower than that of BFPT. Since BFPM has the lowest priority of dropping the load, in a specific situation (for example, when one BFPT is stopped due to repair or the like), the BFPM does not drop the load but the corresponding BFPT is dropped.

Referring to FIG. 3, when the BFPM Parallel Mode 100 is Off (120), as in the conventional method, the priority of load dropout is first in BFPM, second in Secondary BFPT, Primary BFPT. Here, the second priority (Secondary BFPT) and the third priority (Primary BFPT), which are priorities between BFPTs, can be exchanged according to the usage environment.

On the other hand, when the BFPM Parallel Mode 100 is On (110), the load dropout priority is first, Secondary BFPT, second is Primary BFPT, and third is BFPM. That is, in the case of Off (120), the BFPM which is the first priority drop target is the third priority drop target and becomes lower in priority when it is On (110).

Examples of practical use of the BFPM Parallel Mode 100 will be described below with reference to FIGS. 4 and 5. FIG.

4 is a view for explaining an embodiment of a water supply operation according to the BFPM parallel mode of the present invention. Specifically, the present embodiment is a case where one BFPT can not be driven (for example, in the event of a failure) under the 0% load state, that is, in the initial startup state.

First, FIG. 4A shows a case in which the BFPM has the highest priority of dropping the load (that is, when BFPM Parallel Mode is Off) as in the conventional case.

Since it is an initial start-up state, it starts with the start sequence step (S410) of the BFPM. When the load of the power plant reaches 15%, the star sequence sequence (S420) of the first BFPT starts. When the first BFPT is driven, the BFPM is dropped in the order of the load dropout. That is, the M-T transfer step (S430) is performed. Specifically, in the MT transfer step (S430), BFPT balancing is performed and BFPT Min FCV is closed (closed). That is, after the BFPT Min FCV is opened, the BFPT water discharge is recirculated, and when the balancing is completed, the FCV is closed and the water is actually discharged to the power plant. Thereafter, BFPM runs out of load (BFPM Run to Min) and only one BFPT is fed. The remaining one BFPT can not be driven due to failure, resulting in a power generation of only 40% of the load.

4B shows a case where the BFPM Parallel Mode of the present invention is On.

Since it is the initial startup situation, it starts with the start sequence step (S440) of the BFPM first. When the load of the power plant reaches 15%, the step S450 of changing the BFPM Parallel Mode to On is performed by the driver's input (or the demand from the FW Master), and then the start sequence step S460 of the first BFPT is started . Since the BFPM has the lowest dropout order, the BFPM does not drop the load, and the M-T parallel step (S470) is performed accordingly. Specifically, in the MT Parallel step (S470), when the first BFPT is in a state of load dropout and the first BFPT performs balancing in case of 30% load, and balancing is completed (by closing BFPT Min FCV) The water supply from the BFPT is also discharged, and the power generation up to 80% load is achieved. Here, 80% is the load factor achieved by operating one BFPM and one BFPT in parallel, and is higher than 40% in the case of referring to FIG. 4 (a).

As described in the present embodiment, the power plant can be operated up to approximately 40% of the load. However, by introducing the BFPM Parallel Mode, the power plant can be operated up to approximately 80% load.

In the above-described embodiment, the BFPM start sequence, the first BFPT start sequence, the BFPM parallel mode on operation, and the like can be performed according to the input signal by the driver or according to the demand by the FW Master. Pump balancing, FCV open / close change and load dropout are now fully automated at the plant site. Meanwhile, the specific values (15%, 40%, etc.) exemplified in this embodiment can be various values depending on the operation of the power plant, and the values shown in this embodiment are merely examples for helping understanding of the invention. It is not intended to limit the scope.

Fig. 5 is a diagram for explaining the procedure in the embodiment of Fig. 4. Fig.

Referring to FIG. 5A, in the case where the BFPM Parallel Mode is Off (that is, when the priority of the dropping of the BFPM is highest) and the initial startup, the BFPM start sequence step S410 is performed, When the load of the power plant reaches 15%, the BFPT start sequence step S420 is performed. The BFPM is dropped by the load dropout order, and accordingly, the M-T transfer step (S430) is performed. The operation of the specific pump in each step is the same as that described with reference to Fig. 4 (a).

Referring to FIG. 5B, in the initial startup state, the BFPM start sequence step S440 is performed, and when the load of the power plant reaches 15%, the step S450 of changing the BFPM parallel mode to On is performed Then, the start sequence step S460 of the first BFPT is performed. Since the priority of dropping the load is the lowest, the BFPM does not drop the load, and the M-T parallel step (S470) is performed. The operation of the specific pump in each step is the same as that described with reference to Fig. 4 (b).

6 is a view for explaining another embodiment of the water supply operation according to the BFPM parallel mode of the present invention. Specifically, the present embodiment is a case in which one BFPT must be stopped (for example, when maintenance is required) in a situation where the power plant is operated with a 100% load (i.e., at a full startup).

In a situation where the power plant is operated at a load of 100%, the BFPM start sequence step (S510) is started first. As a result, the stationary BFPM is switched to the BFPM load dropped condition. That is, the BFPM is activated but the BFPM Min FCV is opened so that the water discharge from the BFPM is recirculated and the water supply is not actually discharged to the power plant. Then, the step S515 of changing the BFPM Parallel Mode to On is started. Accordingly, since the BFPM has the lowest rank in the dropping order, the BFPM can start the M-2T Parallel step (S520) without dropping the load. In the M-2T Parallel step (S520), the BFPM is balanced. Assuming that the BFPT to be maintained / repaired is the second BFPT, the step of lowering the load to 80% (S525) is performed before stopping the second BFPT. The second BFPT is unloaded in accordance with the load falling input, and as a result, the M-T parallel step S530 is performed in which the BFPM and the first BFPT are operated in parallel. In the M-T Parallel stage, the load is lowered to 85%, corresponding to the second BFPT, the load is dropped, and the load falls further to 80%. Thereafter, the stop sequence step S535 of the second BFPT may be performed and maintenance / repair may proceed to the second BFPT. When the maintenance / repair is completed, a start sequence step (S540) is performed on the second BFPT. As a result, the second BFPT is changed from the stopped state to the dropped state, and the step of increasing the load to 85% (S545) is performed. Accordingly, since the second BFPT participates in the load sharing, the M-2T Parallel step S550 is performed. In the M-2T parallel step (S550), the load is increased to 85% and the second BFBT is balanced. Since it is no longer necessary to maintain the BFPM Parallel Mode, the step of turning off the BFPM Parallel Mode (S555) is performed. As a result, the BFPM is removed from the load and the 2T Parallel step S560 is performed. Thereafter, a step S565 is performed in which a signal for raising the load to 100% is inputted.

According to the existing plant operation policy without BFPM Parallel Mode, in the case of the embodiment of FIG. 5, it is possible to stop the second BFPT requiring maintenance after lowering the load of the power plant to 50%. In addition, after the maintenance, the second BFPT had to be driven and balanced and then gradually increased to 100% load, and all this sequence had to go through manually. As a result, thanks to the BFPM Parallel Mode according to the present invention, the operator's input operation can be minimized and the load factor of the power plant can be kept higher.

In the embodiment described above, the BFPM star sequence, the load rise / fall input, the BFPM Parallel Mode On operation and the like can be performed according to the input signal by the driver or according to the demand by the FW Master. Pump balancing, FCV open / close change and load dropout are now fully automated at the plant site. Meanwhile, the specific values (85%, 80%, etc.) exemplified in this embodiment may be various values depending on the operation of the power plant, and the values shown in this embodiment are merely examples for helping understanding of the invention. It is not intended to limit the scope.

Fig. 7 is a diagram for explaining the procedure in the embodiment of Fig.

When the BFPT is to be stopped in a situation where the power plant is operated with a load of 100% (for example, maintenance is required), the procedure of using BFPM Parallel Mode will be described as follows.

First, the BFPM start sequence step (S510) is started. As a result, the stationary BFPM is switched to the BFPM load dropped condition. Then, the step S515 of changing the BFPM Parallel Mode to On is started. Accordingly, the BFPM load dropout order is ranked third, so that the BFPM can start the M-2T Parallel step (S520) without dropping the load. Assuming that the BFPT to be maintained / repaired is the second BFPT, the step of lowering the load to 80% (S525) is performed before stopping the second BFPT. The second BFPT is unloaded in accordance with the load falling input, and as a result, the M-T parallel step S530 is performed in which the BFPM and the first BFPT are operated in parallel. Thereafter, the stop sequence step S535 of the second BFPT may be performed and maintenance / repair may proceed to the second BFPT. When the maintenance / repair is completed, a start sequence step (S540) is performed on the second BFPT. As a result, the second BFPT is changed from the stopped state to the dropped state, and the step of increasing the load to 85% (S545) is performed. Accordingly, since the second BFPT participates in the load sharing, the M-2T Parallel step S550 is performed. In the M-2T parallel step (S550), the load is increased to 85% and the second BFBT is balanced. Since it is no longer necessary to maintain the BFPM Parallel Mode, the step of turning off the BFPM Parallel Mode (S555) is performed. As a result, the BFPM is removed from the load and the 2T Parallel step S560 is performed. Thereafter, a step S565 is performed in which a signal for raising the load to 100% is inputted.

Meanwhile, a computer program for performing the method described with reference to FIGS. 3 to 7 may be implemented. Such a computer program may be stored and executed in a computing device for controlling a water supply system of a power plant boiler.

For example, the computer program may include instructions for starting (S440) the BFPM start sequence, enabling (S450) BFPM Parallel Mode, instructions for starting the first BFPT start sequence (S460) (S470).

Alternatively, the computer program may include instructions for starting (S510) the BFPM star sequence, instructions for enabling (S515) BFPM Parallel Mode, instructions for the M-2T Parallel (S520) Instructions for the first BFPT start sequence (S530), instructions for the second BFPT stop sequence (S535), instructions for the second BFPT start sequence (S540), instructions for the M-2T Parallel step (S550), disable BFPM Parallel Mode (S555), and instructions for the 2T Parallel step (S560).

In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions may be stored or transmitted as one or more instructions or code on a computer readable medium. Computer-readable media includes both communication media and computer storage media including any medium that facilitates transfer of a computer program from one place to another. The storage medium may be any available media that is accessible by a computer. By way of example, and not limitation, such computer-readable media can comprise any computer-readable medium, such as RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, And any other medium that can be used to store and be accessed by a computer. Also, any connection is properly referred to as a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a wireless technology such as coaxial cable, fiber optic cable, twisted pair cable, digital subscriber line (DSL), or infrared, radio and ultra high frequency, Wireless technologies such as fiber optic cable, twisted pair, DSL, or infrared, radio and microwave are included in the definition of media. Disks and discs as used herein include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs, While discs reproduce data optically by means of a laser. Combinations of the above should also be included within the scope of computer readable media.

When embodiments are implemented as program code or code segments, the code segments may be stored as a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class, As well as any combination thereof. A code segment may be coupled to another code segment or hardware circuit by conveying and / or receiving information, data, arguments, parameters or memory contents. Information, arguments, parameters, data, etc. may be communicated, sent, or transmitted using any suitable means including memory sharing, message passing, token passing, Additionally, in some aspects, steps and / or operations of a method or algorithm may be performed on one or more of the codes and / or instructions on a machine readable medium and / or computer readable medium that may be integrated into a computer program product As a combination or set of < / RTI >

In an implementation in software, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor and external to the processor, in which case the memory unit may be communicatively coupled to the processor by various means as is known.

In a hardware implementation, the processing units may be implemented as one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays Controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe all possible combinations of components or methods for purposes of describing the embodiments described, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the described embodiments are intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Furthermore, to the extent that the term "comprises" is used in the detailed description or the claims, such terms are intended to be inclusive in a manner similar to "consisting" .

As used herein, the term " infer "or" inference "generally refers to a process of determining or inferring a state of a system, environment, and / or user from a set of observations captured by events and / It says. The inference may be used to identify a particular situation or action, or may generate a probability distribution for, for example, states. The inference can be probabilistic, that is, it can be a computation of a probability distribution for corresponding states based on consideration of data and events. Inference may also refer to techniques used to construct higher level events from a set of events and / or data. This inference may be based on a set of observed events and / or new events or operations from stored event data, whether the events are closely correlated in time, and whether events and data are coming from one or more events and data sources .

Furthermore, as used in this application, the terms "component," "module," "system," and the like are intended to encompass all types of computer- Entity. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable execution thread, a program, and / or a computer. By way of illustration, both the application running on the computing device and the computing device can be components. One or more components may reside within a process and / or thread of execution, and the components may be centralized on one computer and / or distributed between two or more computers. These components may also be executed from various computer readable media having various data structures stored thereon. The components may be associated with a signal having one or more data packets (e.g., data from a local system, data from another component of the distributed system and / or signals from other components interacting with other systems via a network such as the Internet) Lt; RTI ID = 0.0 > and / or < / RTI > remote processes.

Claims

A method for operating a water supply system of a power plant boiler at an initial start-up,
Wherein the water supply system includes a BFPM and a plurality of BFPTs different in driving method from the BFPM,
The method comprising:
Starting a BFPM start sequence (S440); And
(S450) activating (turning on) the BFPM parallel mode,
Wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT in the plurality of BFPTs and a second order is a first BFPT in the plurality of BFPTs and a third order is the BFPM.
A method for operating a water supply system of a power plant boiler at an initial start-up.

The method according to claim 1,
The method comprising:
Starting a first BFPT start sequence (S460); And
(S470) in which the BFPM and the first BFPT are operated in parallel.
A method for operating a water supply system of a power plant boiler at an initial start-up.

3. The method of claim 2,
In the MT parallel step S470:
The first BFPT is switched from the stop state to the load dropout state,
Balancing of the first BFPT is performed as the load of the power plant increases,
And the load of the power plant is further raised by adding water supply / discharge from the first BFPT.
A method for operating a water supply system of a power plant boiler at an initial start-up.

A method for operating a water supply system of a power plant boiler at full start,
Wherein the water supply system includes a BFPM and a plurality of BFPTs different in driving method from the BFPM,
The method comprising:
Starting a BFPM start sequence (S510); And
(S515) activating (turning on) the BFPM parallel mode,
Wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT in the plurality of BFPTs and a second order is a first BFPT in the plurality of BFPTs and a third order is the BFPM.
A method for operating a water supply system of a power plant boiler at full startup.

5. The method of claim 4,
The method comprising:
Further comprising an M-2T parallel step (S520) in which two BFPTs including the first BFPT and the second BFPT are operated in parallel with the BFPM,
And the balancing of the BFPM is performed in the M-2T parallel step (S520).
A method for operating a water supply system of a power plant boiler at full startup.

6. The method of claim 5,
The method comprising:
A MT parallel step (S530) in which the BFPM and the first BFPT are operated in parallel as the load of the power plant decreases; And
Further comprising the step of starting (S535) the second BFPT stop sequence,
And the second BFPT is disconnected from the load as the load of the power plant decreases in the MT parallel step S530.
A method for operating a water supply system of a power plant boiler at full startup.

The method according to claim 6,
The method comprising:
Starting a start sequence for starting the second BFPT start sequence (S540); And
And an M-2T parallel step (S550) in which the BFPM and the two BFPTs operate in parallel as the load of the power plant increases,
And balancing of the second BFPT is performed as the load of the power plant increases in the M-2T parallel step (S550)
A method for operating a water supply system of a power plant boiler at full startup.

8. The method of claim 7,
The method comprising:
Disabling (Off) the BFPM parallel mode (S555); And
And a 2T parallel step (S560) in which the two BFPTs are operated in parallel in accordance with a drop in load of the BFPM.
A method for operating a water supply system of a power plant boiler at full startup.

A computer program stored in and executed by a computing device for operation at an initial start-up of a water supply system of a power plant boiler,
Wherein the water supply system includes a BFPM and a plurality of BFPTs different in driving method from the BFPM,
The computer program comprising:
Instructions for starting a BFPM start sequence (S440); And
Activating the BFPM parallel mode (S450)
Wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT in the plurality of BFPTs and a second order is a first BFPT in the plurality of BFPTs and a third order is the BFPM.
A computer program stored and executed on a computing device for operation at a power-on boiler water-supply system at an initial start-up.

10. The method of claim 9,
The computer program comprising:
Instructions for starting a first BFPT start sequence (S460); And
Further comprising instructions for a MT parallel step (S470) in which the BFPM and the first BFPT are operated in parallel,
A computer program stored and executed on a computing device for operation at a power-on boiler water-supply system at an initial start-up.

11. The method of claim 10,
In the MT parallel step S470:
The first BFPT is switched from the stop state to the load dropout state,
Balancing of the first BFPT is performed as the load of the power plant increases,
And the load of the power plant is further raised by adding water supply / discharge from the first BFPT.
A computer program stored and executed on a computing device for operation at a power-on boiler water-supply system at an initial start-up.

A computer program stored in and executed by a computing device for operating at a start-up of a water supply system of a power plant boiler,
Wherein the water supply system includes a BFPM and a plurality of BFPTs different in driving method from the BFPM,
The computer program comprising:
Instructions for starting the BFPM start sequence (S510); And
And activating (S515) BFPM Parallel Mode,
Wherein a first order of priority of load dropout in the BFPM parallel mode is a second BFPT in the plurality of BFPTs and a second order is a first BFPT in the plurality of BFPTs and a third order is the BFPM.
A computer program stored and executed on a computing device for operation at a power-on boiler watering system at full startup.

13. The method of claim 12,
The computer program comprising:
Further comprising instructions for an M-2T parallel step (S520) in which two BFPTs including the first BFPT and the second BFPT are operated in parallel with the BFPM,
And the balancing of the BFPM is performed in the M-2T parallel step (S520).
A computer program stored and executed on a computing device for operation at a power-on boiler watering system at full startup.

14. The method of claim 13,
The computer program comprising:
Instructions for MT parallel operation (S530) in which the BFPM and the first BFPT operate in parallel as the load of the power plant decreases; And
Further comprising instructions for starting (S535) the second BFPT stop sequence,
And the second BFPT is disconnected from the load as the load of the power plant decreases in the MT parallel step S530.
A computer program stored and executed on a computing device for operation at a power-on boiler watering system at full startup.

15. The method of claim 14,
The computer program comprising:
Instructions for starting (S540) the second BFPT start sequence; And
Further comprising instructions for an M-2T parallel step (S550) in which the BFPM and the two BFPTs operate in parallel as the load of the power plant rises,
And balancing of the second BFPT is performed as the load of the power plant increases in the M-2T parallel step (S550)
A computer program stored and executed on a computing device for operation at a power-on boiler watering system at full startup.

16. The method of claim 15,
The computer program comprising:
Instructions for deactivating the BFPM parallel mode (S555); And
Further comprising instructions for a 2T parallel step (S560) in which the two BFPTs operate in parallel in response to a drop in load of the BFPM.
A computer program stored and executed on a computing device for operation at a power-on boiler watering system at full startup.