英文摘要

2018-04-01Analysisofheterogeneousdatainfancontrollerbasedonmappingmodel

WUHailie1,SHENGHaojie2,WUHuifeng2(1.Zhejiang Yunda Wind Power Company Limited, Wind Power System State Key Laboratory, Hangzhou 310013, China; 2.Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract:As wind power technology has been an important part of the new energy technology recently, different wind power companies in various cities and provinces has deployed a large number of base stations. With the explosive growth of the wind farm, there is large number of monitoring data in transferring which needs to be taken regular troubleshooting and screening on. However the inconsistency and complexity of the data has created great difficulties for the implement of this work. To this end, a heterogeneous data analysis method based on mapping model is constructed creatively. Different types of monitoring data obtained by the controller (Beckhoff, Mita, etc.) are transmitted to the mapping model via the data input interface. There are many mapping constraints, mapping terms and mapping rules in the definition of this model, which can integrateincoming data into the same data structure. Then the data is sent to the system software platform which is connected to the output interface. Finally it is displayed on the platform after a simple image processing. Experimental results show the implementation of this method can greatly improve the speed and efficiency of daily screening.

Keywords:mapping model；mapping rules；heterogeneous data；controllers；software platform

2018-04-05Architectureandimplementationofenergyinterconnectedmicro-grid

LUOYuqiang,XIEXifeng(Guangxi Vocational College of Water Resource and Electric Power, Nanning 530023，China)

Abstract:In order to make full use of the growing renewable energy and promote energy structure reform， energy internet is considered as an effective way to promote the reform because it can make full use of energy and increase the permeability of renewable energy. The technical characteristics and connotation of energy internet has been elaborated. Important parts of the energy internet which are energy interconnected micro-grid, its three layer architecture and key devices on each layer of structure. The connection between photovoltaic, wind energy storage micro-grid and active distribution network is put forwards. The architecture of software and hardware applied to a campus energy internet has been achieved, which demonstrates the validity of the structure of energy internet micro-grid.

Keywords:energy internet; micro-grid; renewable energy; three layer architecture

2018-04-09Researchoncomprehensivetreatmenttechnologyofwater-spoutingnoiseoflargenaturaldraftcoolingtower

HAOGongtao，JIANGJiaxu，HUDa，ZHUYue(Huadian Electric Power Research Institute Company Limited，Hangzhou 310030，China)

Abstract:Due to the improvement of the functional classification of sound environment, the original noise barrier reduction measures for cooling towers cannot meet the second class requirements of ‘Emission standard for industrial enterprises noise at boundary’. Retaining the acoustic barrier structure of the original cooling tower, it takes full consideration of the old facilities, capital of investment and noise reduction etc. It puts forward three different design solutions which are adding silencing mat, improving original noise barrier and adding new sound absorption channels. Through the comprehensive comparison and analysis of these noise reduction design, it recommend the solution of increasing the height of the original linear sound barrier and adding inside sound absorption.

Keywords:thermal power plant; cooling tower; noise barrier; water-spouting noise; comprehensive treatment

2018-04-12Designofthree-phaserectifierclosedloopcircuitsystemcontrolledbyintegratedtrigger

QIYinian1,LIYadong2,HEBo3(1.Nanjing Guodian Nanzi Automation Company Limited, Nanjing 211100, China; 2.State Grid Lanzhou Power Supply Company, Lanzhou 730050, China; 3.Electrical Engineering College, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract:In order to improve reliability and stability of three-phase rectifier circuit controlled by integrated shift trigger, a method of closed loop system is given by deduction and analysis of the circuit transfer function. Meanwhile, it proposes a method to realize the soft start of control circuit based on the analyzing the start process of rectifier circuit. Finally, the experimental testing results and corresponding analysis are given which provide a good reference for the practical engineering application of three-phase rectifier circuit controlled by integrated phase shift trigger.

Keywords:phase shift trigger; three-phase rectifier circuit; closed loop control; soft start

2018-04-16ThermaldesignoflocallyinstalleddevicebasedonICEPAK

TONGXingxing,YUChunlin,DAITingzhen,HANGRenping(Guodian Nanjing Automation Company Limited, Nanjing 211153, China)

Abstract:Thermal design is made according to the characteristics of locally installed device which has small internal space, high localized heat and high sealing level. It adopts ‘integrated-case’as layout scheme and adopts thermal conduction pad to optimize thermal resistance，which solve the problem of heat dissipation of the device. Meanwhile system thermal simulation analysis is made on locally installed protection device by finite element simulation software ICEPAK, by which the temperature distribution inside the device can be obtained. Comparing thermal test results with simulation results, it shows that the simulation results are authentic and reliable.

Keywords:ICEPAK；finite element；locally installed device；thermal design

2018-04-19Researchonone-pointgroundingprotectionofgeneratorrotor

WANGXiuxia1,WANGXuerong1,YANHan1,HEYiming1,LIUXiaobo2(1.Fengman Power Plant, Jilin 132113, China; 2.Guodian Nanjing Automation Valmet Company Limited，Nanjing 210032, China)

Abstract:Rotor grounding protection is one of the important parts of protection system of generator transformer unit. At present the rotor grounding protection cannot be double configured because of the protection principle. In order to become a real double configuration of one-point grounding rotor protection, the features of one-point grounding protection of rotors are studied. Simultaneous operation of injecting DC rotor one-point grounding protection and injecting AC rotor one-point grounding protection is put forward as a scheme. The two sets of on-one point grounding protection can be used dependently and independently. The field test indicates that the double configuration of rotor grounding protection can meet the operation requirements on site.

Keywords:generator; rotor; injecting DC rotor one-point grounding protection; injecting AC rotor one-point grounding protection; double configuration

2018-04-22Researchandapplicationofwaterabstractionproblemofpowerstationboilersurplusheatutilizationsystem

ZHANGYan(Chengxin Green Integration Company Limited, Xiamen 361009, China)

Abstract:Flue gas surplus heat utilization and emission reduction technology of power plant boilers have achieved remarkable results and has been widely used. Studying on water abstraction balance, obtaining inlet and outlet pressure of the electric control valve by theoretical calculation and considering the conditions of flow and pressure, the electric control valve can be reasonably selected, which can ensure the flow direction. The problem of reverse flow in the water abstraction in project reconstruction is solved. The stability and safety of the system operation is ensured.

Keywords:further utilization of surplus heat; energy-saving reconstruction; water abstraction balance; control valve; flow characteristic

2018-04-259Fgasturbineinletfiltrationsystemupgradeandtransformation

LILi,MINHuashan(Wuxi Western Gas Thermal Power Company Limited, Wuxi 214151, China)

Abstract:In Wuxi Western Gas Thermal Power Company Limited, the filter differential pressure of a 9F gas turbine inlet filtration system increased rapidly to the alarming limit in a short period. Analyzing the problems existing in the original design, it puts forward a set of measures which includes improving coarse filtration precision, upgrading fine filter’s filtering material and change outlet of exhausting gas. After the transformation, the filtration system works well, which reduces the operation and maintenance cost, improves the safety and stability of the unit and obtains remarkable economic benefits.

Keywords:gas turbine; intake filtration system; differential pressure; coarse filter; fine filter; economic benefits

2018-04-28Evaluationmethodofenergysavingeffectoflowtemperatureeconomizer

ZHOUZhou,LIUNan(Xuzhou Huarun Power Company Limited, Xuzhou 221100, China)

Abstract:Take a 300 MW unit of Xuzhou Huarun Power Company Limited as an example, using the unit’s thermal parameters and operational parameters after the low temperature economizer modification, it compares energy-saving effect of low temperature economizer with two methods in which the equivalent enthalpy drop calculation and low temperature economizer switching test are used. The evaluation results verify the correctness of the theoretical calculation and the method, and the two methods can be used for mutual check.

Keywords:low temperature economizer; energy-saving effect; equivalent enthalpy drop; coal consumption for power supply

2018-04-30Chemicalcleaningofheatrecoverysteamgeneratorof9Fclassgas-steamcombinedcycleunit

WANGGuorong(Jiangsu Huadian Wangting Power Plant ，Suzhou 215155, China)

Abstract:Water-vapor system of heat recovery steam generator is far more complex than coal burning boiler. Domestic studies on chemical cleaning of heat recovery steam generator are still in exploring. It discusses the selecting principles of cleaning medium in chemical cleaning of heat recovery steam generator in operation. The cleaning characteristics of high, medium and low pressure system are analyzed to designs a combined cleaning proposal for multi-systems. It efficiently shortens the cleaning duration, and put forward disposal approaches to deal with liquid waste according to the cleaning proposals.

Keywords:heat recovery steam generator; chemical cleaning; cleaning medium; cleaning process; liquid waste disposal

2018-04-34TheanalysisandprocessingofsignalsuchasV/Flimitationinthestartingprocessofahydroelectricunit

YANGZhinan(Goupitan Power Plant，Meitan 564408，China)

Abstract:Taking#5 unit of a hydropower plant, it analyze the V/F limitation and over excitation signal during the starting process. It find out the main factor that affects the buildup and grid-connection process in the starting and downstream control phase of hydraulic turbine unit. It proposes corresponding solutions and improves the success rate of hydropower unit grid-connection.

Keywords:hydraulic turbine unit; V/F limitation; over excitation; grid connection; excitation regulator; governor

2018-04-36Analysisofinvalidlow-temperaturereheaterofsupercriticalunit

TENGShuhui(Guangdong Datang International Zhaoqing Thermoelectric Company Limited, Zhaoqing 526105, China)

Abstract:Aiming at an invalid tube sample of a low-temperature reheater of a 1 000 MW unit, room temperature performance, metallography and nondestructive testing results were analyzed. It is concluded that the welding quality, lack of original performance are major causes of tube failure, and corresponding suggestions for the cause of material failure were put forward.

Keywords:1 000 MW unit; supercritical unit; low-temperature reheater; invalid tube sample; tube exploding; welding quality

2018-04-40Modularprefabcabintechnologyintransformersubstationmodularconstruction

GUMingfei,YUANDifei(Guodian Nanjing Automation Company Limited, Nanjing 211153,China)

Abstract:In the pilot station of new generation smart transformer substation, the prefabricated cabin is gradually replacing the traditional construction. On the basis of the prefabricated module, the modular prefabricated cabin has been put into use after conceiving, design and demonstration. It introduces the formation, classification on purpose and assembling technology of the present modular prefabs. Utilizing modular prefabricated cabin can reduce the number of independent module and improve the land utilization rate of substation.

Keywords:modular prefabricated cabin; cabin unit; cabin assembling; protect; insulation

2018-04-42Protectionandstudyonoxidecoatingofpowerstationboilers

YANXiaozhe1，YANGPing2(1.Guangdong Institute of Special Equipment Inspection and Research, Foshan 528251, China； 2.FoshanInstitute of Guangdong Institute of Special Equipment Inspection and Research, Foshan 528251, China)

Abstract:Oxide coating seriously affects the safe and economic operation of power plants’ units. It introduces the protection and control technology of oxide coating based on the mechanism of its formation and spalling. It includes operation control, detection/assessment/ forecast of coating thickness and accumulation situation, chemical cleaning and changing tube. It provides a reference to the protection and control of oxide coating on heating surfaces,which is a guidance of safe operation of units.

Keywords:power station boiler；oxide coating；explosion of tube; protection; control；chemical cleaning

2018-04-45AschemetoreducetheexhausttemperatureoftheHRSGintheregionalgasdistributionsystem

YULi1,2(1.China Huadian Engineering Company Limited，Beijing 100070； 2.Huadian Distributed Energy Company Limited，Beijing 100070，China)

Abstract:In order to make full use of waste heat in regional distributed energy system, the exhaust gas temperature of heat recovery steam generator (HRSG)should be minimized. For the distributed power system with heavy steam load but no return water, the water supply of the thermal system needs to be deoxygenated before supplemented into the thermal system. Deoxygenation and water feeding system can adopts atmospheric type and vacuum type systems, which can be combined with the hot water heat exchanger at the end of HRSG. It is a solution to reduce the exhaust gas temperature of the HRSG. Comparing the performance parameters of two different deoxygenation systems, it can be seen that the exhaust gas temperature of the vacuum deoxygenation system is lower.

Keywords:regional distributed energy system; HRSG; exhaust gas temperature; vacuum deoxygenation system; atmosphericdeoxygenation system

2018-04-47Researchonthedryandwetconversiontechnologyofultra-supercritical1000MWunitboiler

LIJinbin(Guangdong Yuedian Jinghai Power Generation Company Limited, Jieyang 515223, China)

Abstract:According to the boilers’main operating technique points in the process of dry and wet state conversion, main parameters of the system operation and adjustment are controlled. Main parameters including feed capacity of water, feed capacity of coal, water-coal ratio, steam temperature, pressure and control method of units (parameter data under every working conditions) are analyzed. The key points are summarized to guide the operators to operate correctly and reliably. Improving the operation level can ensure the safety of unit in start and stop phrases.

Keywords:1 000 MW unit; dry and wet state conversion; safety analysis; economic benefits

2018-04-50Economicanalysisonsteam-drivenpumpundervariableworkingconditions

BAILei(Guangzhou Hengyun East District Thermo-power Company Limited, Guangzhou 510760, China)

Abstract:By analyzing the operation parameters of the steam-driven pump under the rated condition and variable conditions, it confirms the range of working condition parameter under economic operation .It also analyzes the relationship between payback period and operation parameters of steam-driven pump.

Keywords:steam-driven pump; economic; operation parameters

2018-04-52Faultandtreatmentofcondensatesystemduringstart-upof660MWunit

WANGLu(Hunan Huadian Changde Power Generation Company Limited, Changde 415000, China)

Abstract:During the first start of a power generation company’s unit after its overhaul, the aqua soluble paper residue used in the pipe welding on the boiler heating surface entered the condenser from the bypass system. It caused clog of condensate pumps’s outlet filters successively，which forced the boiler to stop. The filters were blocked again right after cleaning, which affected the startup process. A method in which condensate system was separated from the water supply system was used in circulating washing the condensate system. The unit returned to normal operation. Finally the problems that should be noticed during the units’ overhaul are summarized.

Keywords:startup; condenser; condensate pump; filter; clogging

2018-04-54ImprovementofthegassupplementationsystemofGISanddisposalofthedecompositionofSF6gas

WUXinjie(Ningbo Baoxin Stainless Steel Company Limited, Ningbo 315800，China)

Abstract:In the operational process of gas insulated switch (GIS), there may be low voltage alarm due to the decrease of SF6gas pressure in GIS which is caused by the aging of the sealing element and the stress test. During the supplementation of the SF6gas, the air will enter the GIS and its pipes, and the excessive SF6gas will be directly discharged into the atmosphere. Taking practical projects into consideration, a new gas supplementation device is designed which solves the problem above well. Finally, the treatment method on decomposition of SF6gas is summarized.

Keywords:GIS；SF6; pressure; gas supplementation device; decomposition; disposal

2018-04-56Discussiononslidingparametersof630MWsupercriticalunit

YANXu,LIUHu,RUANXishan(Guodian Tongling Power Generation Company Limited, Tongling 244153, China)

Abstract:The sliding parameter shutdown can quickly reduce the temperature of the adjusting metal of the steam turbine, shorten the running time of the turning before overhaul and facilitate the rapid development of the relevant maintenance on the turbine. It introduces main/reheat steam temperature control, underload running control points and the changing trend of main parameter of a 630 MW supercritical unit of a power station in its shutdown process. It puts forward remarks in sliding parameter shutdown process, and analyzed the main existing problems and corresponding solutions in sliding parameter shutdown process.

Keywords:sliding parameter; shutdown; main/reheat steam; temperature; operating control

2018-04-59StudyonoptimizationofSCRammoniainjectionsystemofa300MWunit

LIUXiaomin1,LEISiyuan2,MAYunlong2,CHENWeiyong1,ZHENGHuayong1,KONGFanhai2,WANGLele2(1.Xianmen Huaxia International Power Development Company Limited, Xiamen 361026，China; 2.TPRI Company Limited, Suzhou Branch, Suzhou 215153, China)

Abstract:In the operation of ultra-low emission of a 300 MW unit, the phenomenon of partial nozzle clogging and properly adjusted ammonia injection of partial reactor’s section exists chronically. The analysis is mainly concerned with its layout and location. In this paper. The necessity of optimizing the ammonia injection system is put forward and the original scheme is optimized and modified by means of numerical simulation. Ammonia injection grid is moved from the horizontal flue to the vertical flue. The modified plan has the advantages of less investment and convenient maintenance, etc. It is expected to effectively prevent nozzle clogging, enhance ammonia injection effectiveness and prolong catalyst life.

Keywords:300 MW unit; ultra-low emissions; SCR denitration; flue; ammonia injection system; numerical simulation

2018-04-63Applicationofimmersionultrafiltrationmembraneinwastewaterreuseofpowerplant

FENGJiwei(Huadian Water Film Separation Technology (Tianjin) Company Limited, Tianjin 300143，China)

Abstract:Taking the circulating cooling sewage reuse system of Wuda Thermoelectric Station as example, it introduces the technical characteristics of immersion ultrafiltration, characteristics of components and operation condition of ultrafiltration membrane module. The ultrafiltration operation parameters are analyzed. The operation results of ultrafiltration membrane shows that the application of a domestic immersion ultrafiltration membrane module in this project is reliable, which can provide reference for the water reuse of power plants in other northern inland areas.

Keywords:ultrafiltration; immersion membrane; hollow fiber membrane; circulating cooling sewage; wastewater reuse

2018-04-67Theoptimizationofautomaticcontrolstrategyof300MWcoal-firedunitsSCRfluegasdenitrificationandammoniainjection

LIFeng，JIANGWentang，SHIZhongjun，ZHANGGuo，HUYong，DINGShaokun(Huadian Energy Company Limited, Mudanjiang Second Power Plant,Mudanjiang 157015, China)

Abstract:It briefly introduces the key factors affecting the stability of NOxparameters of thermal power unit coal-fired flue gas denitrification systemautomatic adjustment control strategy with selective catalytic reduction (SCR) denitrification ammonia injection. It discusses the automatic control method of ammonia injection flow and puts forward an optimized control method, by which fixed NOxoutlets are cascade controlled, to replace the single loop denitrification. It explains the problems, solutions and the effect of the automatic control system in the debugging and operation process. It solves the difficulty in controlling NOxparameter at denitrification outlets due to the inertia and meets the requirement of SCR denitrification automatic control, which is of certain reference.

Keywords:gas denitrification; SCR; mole ratio; automatic control

2018-04-70Optimizationschemeofreverseosmosispre-treatmentfilter

LIUXinchun,WangGuorong(China Huadian Corporation Wangting Power Plant, Suzhou 215155, China)

Abstract:In a chemical water workshop of a power plant，the pre-treatment filter of reverse osmosis is easy to be blocked due to the original water quality. The filter cartridge is replaced frequently and the operation costs is high. Furthermore, pre-treatment filter blocks are easy to accelerate the pollution and plugging speed of the reverse osmosis membrane and inhibit water yield. After optimizing the reverse osmosis pre-filtration system, the results show that the optimized system effectively reduce the frequency of filter replacement, running cost, maintenance work intensity and increase the periodical water yield. Meanwhile, the system can be effectively avoided from suspending of osmosis system while changing the filter cartridge, which ensures the continuous and adequate supply of demineralized water. The economy and safety of reverse osmosis system are improved.

Keywords:reverse osmosis; pre-treatment filter; filter cartridge; economy

2018-04-73Designofauxiliarydecision-makingmoduleforphotovoltaicoperationandmaintenancesystem

XUHongwu1, 2,TANTingfang1,LiJingxia1,WANGDongxia1,WANGTao1,SHENHuang1,ZHANGZhe1(1.Guodian Nanjing Automation Company Limited, Nanjing 211106, China; 2.Southeast University, Nanjing 211106, China)

Abstract:The auxiliary decision-making module is the core module in photovoltaic operation. It is important to achieve intelligent operation and improve maintenance management. A brief introduction is made on the photovoltaic power station’s establishment of the production operation index system and the operation evaluation algorithm based on fuzzy comprehensive evaluation. Through the scientific evaluation of the overall operation of photovoltaic power station, the problems existing in the operation of photovoltaic power station can be found in time, and the economic operation level of photovoltaic power station can be improved.

Keywords:auxiliary decision-making; status evaluation; membership degree; fuzzy comprehensive evaluation