CN201887545U

CN201887545U - Power plant APS

Info

Publication number: CN201887545U
Application number: CN2010205472538U
Authority: CN
Inventors: 丁建设; 潘军民; 申莉; 白强
Original assignee: XINHUA CONTROL ENGINEERING Co Ltd
Current assignee: XINHUA CONTROL ENGINEERING Co Ltd
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2011-06-29
Anticipated expiration: 2020-09-29

Abstract

A power plant APS (Automatic Power Plant Startup and Shutdown System) is connected to a DCS (Decentralized Control System), the DCS comprises a data communication network, the data communication network is connected with a plurality of conventional DPUs (Distributed Processing Unit) and a pair of control type DPUs serving as upper control hardware of the power plant APS, and the control type DPUs are arranged side by side with the conventional DPUs in the data communication network. The APS adopts a pair of dedicated DPU control modules for realizing automatic startup and shutdown control, and is independent from the conventional DPUs, so as to facilitate project implementation, realize high utilitarian function, and indicate the development direction of the power plant automatic control.

Description

Power plant's automatic start-stop control system

Technical field

The utility model relates to automatic control system, relates in particular to the automatic start-stop control system APS that is applied to power plant.

Background technology

Along with large unit unit scattered control system (Distributed Control System, DCS) extensive use of the increasingly mature and Power Plant DCS System of technology, the DCS system is not only the upgrading products of control system of power plant, and the controlled function coverage is also in continuous increase.From initial data acquisition system (DAS) function, develop into analog control system (MCS), Furnace Safeguard Supervisory System (FSSS), sequence control system functions such as (SCS).Expand to electric control system (ECS), Bypass Control System (BPC) now again, blow the ash program control, and the integrated control of digital electric-hydraulic control system (DEH), feed pump turbine electrohydraulic control system (MEH), desulfurization control (FGD), peripheral auxiliary system control etc., scope has almost comprised all devices of power plant.In power plant's actual moving process, these control system all are relatively independent systems usually, finish son group level, device level control.The control of MCS analog quantity, (CCS) is controlled to be highest level with coordinated control system, finishes the relevant controlled device of a series of power plant in setting control range.These controls belong to lower floor's Equipment Control mostly, and to guarantee unit, device security, controlled parameter meets power plant thermal system and the power scheduling requirement is main.

Along with increasing of the increase of power plant's fired power generating unit installed capacity, control appliance, the complexity of control and the intensity of operation are also increasing.In view of the operations staff's of power plant operation managerial skills difference, in the startup and running of monoblock, through regular meeting the machine accident takes place to jump under operational outfit damage, boiler extinguishment and the abnormality; How economic to power plant's realization, operational management is efficiently carried out Decision Control and is just seemed important all the more, and this just proposes APS control technology and related request.

Automatic start-stop control system (Automatic Plant Start-up and Shutdown System is called for short APS) is meant monoblock start-stop supervision system, is unit start and stop scheduling, information management and instruction control centre.APS sends the start and stop instruction of each system, subsystem, equipment, thereby realizes starting or stoping automatically of monoblock according to monoblock start and stop curve, good in accordance with regulations program.

The utility model content

In order to realize the unit automation control to power plant, the utility model provides the automatic start-stop control system that is applied to power plant APS.

The technical scheme that its technical problem that solves the utility model adopts is,

The automatic start-stop control system APS of power plant, be connected in scattered control system DCS, scattered control system DCS includes data communication network, be connected with some conventional dispersion treatment cells D PU on the data communication network, also be connected with a pair of control type dispersion treatment cells D PU on the described data communication network as power plant's automatic start-stop control system APS upper strata control hardware.

Described control type dispersion treatment cells D PU is equipped with conventional dispersion treatment cells D PU is sent control command and the software of accepting its feedback signal.

Described control type dispersion treatment cells D PU is listed in conventional dispersion treatment cells D PU on data communication network.

Described data communication network is based on the standard industry Ethernet of TCP/IP.

The beneficial effects of the utility model are, the DPU control module of a pair of special use is provided, and are relatively independent with conventional DCS control logic, are easy to engineering construction, and utility function is strong, are the developing direction of power plant's automation control.

Description of drawings

Fig. 1 is the structural principle block diagram of the automatic start-stop control system APS of the utility model power plant;

Fig. 2 is the Power Plant DCS hardware configuration theory diagram of band APS;

Fig. 3 is APS control start and stop, Switch equipment interface and a priority level schematic diagram;

Fig. 4 is APS and MCS system control interface schematic diagram.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Present embodiment is to use at the expansion of the XDPS-400e of Power Plant DCS System Xinhua control system.

On the hardware foundation of original XDPS-400e control system, increasing system hardware on its data communication network is a pair of redundant DPU; Utilize Virtual DCS Technology, make up XDPS system of Xinhua distributing emulation platform,, utilize XDPS system configuration tool software according to APS system design book and design debug list, configuration control logic on emulation platform, this wherein also comprises improving and housekeeping former DCS system control logic; On emulation platform, the configuration control logic is carried out the variety of way artificial debugging, satisfy APS system design book and the functional requirement of design debug list, meet factory inspection and acceptance; Upgrading DPU up-to-date configuration software (increase and improve APS system-specific algoritic module); At the scene equipment integral put into operation, between limber up period, process is tried out, improved to tissue to each function group of APS system, in unit overall startup process, utilizes APS entire system control unit starting, finishes the actual work that puts into operation.

The APS control logic designs different control logic configurations according to the difference of unit.In concrete logical design configuration process, configuration modes such as modularization, stageization, structuring have been adopted.The more clear control strategy of having realized effectively of one side; Also be convenient to debugging on the other hand and revise, be unlikely to place's logic Modification to occur and the situation that causes the many places chain reaction, improved security of system.

APS control DPU is listed in DCS system convention control DPU, and hardware configuration is identical with other DPU.Difference mainly is software logic configuration part, APS control DPU does not directly control field apparatus, just finish conventional DPU control command is taken place and accepts its feedback signal, simultaneously, with man-machine interface station MMI station interactive information, show APS control information instruction, warning message and accept the manual intervention operation instruction of operations staff.

Because APS and understructure interface are numerous,, need its standard criterion of definition, otherwise bring the confusion of control logic and equipment to touch also for the legibility of configuration logic.APS control start and stop, Switch equipment interface and priority level are as shown in Figure 3.Start and stop, Switch equipment are separate unit control appliances the most basic in the power plant, and designing has manual, automatic grade to protect working method, and hand, automatic working method are subjected to permissive condition and limit, and order control authority to be followed successively by protection, manual, automatic from high to low.Usually, automatically control command is accepted the control command that upper level group STEP step preface piece sends, for equipment arranged side by side the automatic interlock requirement is arranged, dual or the multiple configuration of same capability equipment is pressed for the requirement section technology of security of operation by power plant, has 1 equipment operation during operate as normal at least, surplus person is in the state of having, and adopts the equipment interlocking emergency starting to have equipment.The interlocking startup has appointed condition two: the one, and the operational outfit tripping operation, the 2nd, technological parameter departs from setting, and the former claims electrical interlock, and the latter is called thermal technology's interlocking.

Fig. 4 is APS and MCS system control interface schematic diagram, and the ESMA manual operator is general manual operator, increases APSTR, APSTS input interface on the basis of original ESMA manual operator, inserts constant value command by the multi-functional handoff block of MSFT.OV, OS are the override asserts signal, and rank is the highest, also are to insert the multichannel set command by the MSFT piece.

Correct, the process stabilization of the exquisite data of APS system implementation, this is particularly important to parameter control, and any control loop parameter instability, vibration all exert an influence to APS, and increase APS system's execution stand-by period or program are carried out enabled condition and are not satisfied.

Conventional MCS control, MCS is adjusted in underload section and unit start and stop stage, and control loop is mostly in manual control, and the examination of the quality of MCS is only in steady combustion of boiler or set steady stage.For the unit start and stop stage, because system is changeable, heat power equipment frequent starting, natural in the bigger influence of Control Parameter generation, so, drop into the APS system, not only to solve the regulating characteristics of steady working condition, also will be along with start and stop equipment, operating mode changeable, keep the continual and steady of procedure parameter.Even indivedual control appliances, under different operating modes, controlling object changes along with operating condition.

For unit system control unit, some basic control systems are arranged, give water management, fuel control, air and flue system control as whole process, be the control loop of wanting emphasis to solve, there is defective in any one control loop, all can influence the omnidistance control procedure of APS.According to different boiler units, the control of these control system requires also to be not quite similar, and how to control these systems well, is to want the emphasis consideration in the APS system design process.

More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. power plant's automatic start-stop control system, be connected in scattered control system, scattered control system includes data communication network, be connected with some conventional dispersion treatment unit on the data communication network, it is characterized in that, also be connected with a pair of control type dispersion treatment unit on the described data communication network as power plant's automatic start-stop control system upper strata control hardware.

2. power plant according to claim 1 automatic start-stop control system is characterized in that, described control type dispersion treatment unit is listed in conventional dispersion treatment unit on data communication network.