Integrated Intelligent Energy

Study on feasibility and opportunity of nuclear power development in inland of China

SONG Mingqiang, ZHOU Tao, JU Zhongyun, LI Jingjing

2013, 35(12): 1-3.

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Abstract:By analysis on inland nuclear power development at home and abroad, the consentient opinions and the adverse opinions on nuclear power development in inland of China were analyzed and evaluated. Combining with abroad development experiences, the energy distribution, the economy structure, the environment protection and the technique development of China were studied. The conclusion of the study is that to construct nuclear power plants in inland of China is future development trend and accords with the general requirement of the energy structure distribution, and it is the key link of national economy development. At the same time, the security problem is the key point influencing on successful construction and development of nuclear power plant in inland of China. It is suggested that the nuclear power development pattern in inland of China must be “experimental reactorcommercial reactor”, and considering the long effect of the fourth generation reactor, the start opportunity of the nuclear power development in inland of China may be in duration of 13th Five Year Plan.

Improved algorithm for reconstruction of power distribution network containing distributed power sources

SUN Hongshuo 1, HU Yanlin 2

2013, 35(12): 4-6.

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Abstract:The distributed power generation technology is known as a most probable and most effective way to solve the future energy crisis of human society. Considering the feasible solution, the optimal solution of the network and other aspects, the influence of access of distributed power sources on the distribution network reconstruction was analyzed, and the reconstruction of the distribution network containing distributed power sources was realized. Simultaneously, the algorithm for reconstruction of distribution network was studied. Based on the differential evolutionary algorithm, an improved algorithm was proposed, and the improved algorithm was compared and verified on IEEE33 standard example. The result shows that the improved differential evolutionary algorithm has higher calculation efficiency and better global optimization ability comparing with the original differential evolutionary algorithm.

The research of the heattoelectric ratio influencing factors in heating unit

DAI Jun 1，LIU Guangyao 2，XU Tingting 2，YAN Junjie 2

2013, 35(12): 7-10.

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Abstract:Through the establishment of the heattoelectric ratio calculation model in heating unit and variable condition calculation, this paper studies and analyzes the factors affecting the heattoelectric ratio in heating unit. The research results show that the heattoelectric ratio relates with the heat input ratio of condensing steam cycle and heating cycle, the thermoelectric conversion efficiency of condensing steam cycle and heating cycle and other factors. Among them, the heat input ratio of condensing steam cycle and heating cycle has the most impact. The ratio increases, the heattoelectric ratio decrease. The variable condition calculation of a 300MW heating unit shows that the heattoelectric ratio increases with the heating extraction quantity, and descends by the increase of the unit electric load, increases with the heating extraction steam pressure, increases with the main steam temperature and pressure, basically remain unchanged when the exhaust steam pressure changes.

Study on antiRF interference measures for 4-20mA current output circuit

MA Weidong, WU Shenghua

2013, 35(12): 11-13.

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Abstract:The 4-20mA current output circuit is commonly used in industrial control field. Aiming at the radio frequency interference (RFI) on the 4-20mA current output circuit, by means of experiment and test, the studied data and solution for improving antiRFI ability of the 4-20mA current output circuit were given. The improvement measures were applied in distributed control system, and the system operates well.

Application of gas turbine LM2500+G4 in distributed energy system

JING Qian

2013, 35(12): 14-15.

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Abstract:The structure improvement and performance optimization of the gas turbine LM2500+G4 were introduced. The advanced drytype low emission technology was expounded. The advantages of the combined cooling heating and power (CCHP) system in energy saving and environment protection were analyzed. The analysis result shows that to develop the natural gasfired combined cooling heating and power (CCHP) system is very necessary.

Study on detection and identification of structures of thermal power plant and strengthening measures

SHI Tianqing

2013, 35(12): 16-19.

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Abstract:At present, domestic power generation industry mainly depends on the thermal power generation. Due to the diversity of the power generation technologies, the building structures of thermal power plants are more complex than civil buildings. The power plants built during sixties and seventies 20th century are facing with new round of reformation, and new challenges occur in field of detection and identification methods and the strengthening technologies for power plant building structures. Aiming at the features of power plant building structures, the relevant detection and identification methods and strengthening technologies were summarized, and the suitability of different strengthening methods was illustrated by practical examples.

Analysis on future development trend of design technology of lignitefired thermal power unit

YU Yanxian 1, XU Guoqiang 2, LONG Hui 3

2013, 35(12): 20-22.

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Abstract:Aiming at the features of domestic lignitefired thermal power units, based on the current adoptable main design technology integration for domestic lignitefired thermal power units, the future development trend of generating efficiency of domestic lignitefired thermal power units was analyzed. A concept of energysaving design technology integration for lignitefired (ultra) supercritical unit was put forward. It was suggested to adopt the original innovationintegration innovationsecondary innovation combined method to develop an integrated optimized design technology for lignitefired (ultra) supercritical unit with features of accurate optimization, individuation and integration.

Design of closed type planetary gear reducer and verification

LI Minchen 1, LI Zhisheng 2

2013, 35(12): 23-15.

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Abstract:By means of rational distribution of the number of teeth, a closed type planetary gear transmission device with larger gear ratio was designed. The strength of the planetary gears in various stages and other parts was calculated and checked, and the rationality of the theoretic calculation was verified by means of test. The test result shows that the designed closed type planetary gear reducer can meet the requirement and has better performance.

Application of software Staad.pro in calculation of counter weight for rotating crane of gantry hoist

LI Ye

2013, 35(12): 26-28.

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Abstract:Taking the counter weight of the oneway gantry hoist QM2×800/250kN of a hydropower station as example, using the software Staad.pro, the reaction force of the structure support legs was analyzed, and a calculation method of the counter weight was given. The method was used as reference to determine the practical counter weight of the gantry hoist, and the problem of unbalance of counter weight was solved effectively.

Research on highstrength holding pole as new material used in power transmission and transformation project construction

ZHANG Yubao 1, WU Leijun 2, MA Yanming 3

2013, 35(12): 29-35.

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Abstract:The LGBINtype 15t multifunctional highstrength steel combined holding pole is a new product developed by Shandong Electric Power Construction Second Engineering Company. The holding pole is all made of highstrength steel material, and an easily demountable hinged device is installed in the middle of the pole. The multipurpose exchange function of the single holding pole and the hinged holding pole was truly realized. The structure features and the technical difficulties of the new materialmade holding pole were described, and the manufacturing process and the quality control measures of the steel structural components were introduced.

Analysis on differentials of coking characteristics of 200MW boilers

LI Peng

2013, 35(12): 36-39.

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Abstract:The problem of larger amount of coking in boilers No.1 and No.2 of Xinjiang Huadian Hongyanchi Power Plant was analyzed. The design features, the burner forms and the arrangement mode of the secondary air nozzles of the boilers No.1 and No.2 were compared with those of the boilers No.3 and No.4, and the differentials between the boilers No.1 and No.2 and boilers No.3 and No.4 were found out. The differentials were analyzed, the main reasons of lager amount of coking in boilers No.1 and No.2 were found out, and the reformation suggestions were put forward.

Study on working conditions of chemical water system of aircooled unit

2013, 35(12): 40-42.

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Abstract:The common technology of condensate polishing systems of domestic aircooled units was introduced. The control methods of working conditions of chemical water systems of units with different cooling mode were analyzed. Aiming at the features of aircooled units with different cooling mode, it is necessary to grasp the working conditions of various chemical water systems correctly and to select the condensate polishing system rationally for ensuring the units to operate safely and economically.

Optimization of switching mode of safety busbar power sources

WU Jian

2013, 35(12): 43-45.

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Abstract:The safety busbar of Huaneng Shanghai Shidongkou Second Power Plant has three power sources, the maim power source, the standby power source and a diesel generator as the second standby power source. When the main power source was tripped off, the standby power source can be switched on automatically only after the bus voltage off signal occurred. The diesel generator does not can feed power for load test alone. To switch over from standby power source to main power source need to stop the standby power supply firstly. Aiming at above problems, a reformation measure of the safety busbar was put forward. Under the condition of the same phases of the main power source and the standby power source, two rapid switching devices were added between the three power sources of the safety busbar, and the problems mentioned above were solved effectively.

Analysis on fault of flow data acquisition of intelligent terminal in heat supply network of 300MW power plant and solution

ZHAO Jinliang 1, LI Baoguo 2

2013, 35(12): 46-47.

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Abstract:The control section of the heat supply network of the 300MW thermal power plant consists of a programmable logic controller and an intelligent terminal data collecting system. The intelligent terminal collecting system collects the data of the flow, the pressure and the temperature for metering and charging settlement. The communication of the intelligent terminal system and the intelligent transmitters is not compatible, which caused the flow data collected by the intelligent terminal to be incorrect. The reason of the fault was analyzed, and relevant solution was given.

Discussion on risk control of stopped and suspended EPC project

XIE Hua, WU Peijun, HAO Xinbiao

2013, 35(12): 48-50.

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Abstract:The EPC projects have features of higher complexity, longer construction period and larger investment. Some EPC contractors often suffered large amount of economic losses due to their lack of experiences and lower risk tolerance. Therefore, the risk control, especially the risk control of the stopped and suspended projects is included in key jobs of contract management. According to the starting, postponing and restarting of several projects, the encountered difficulties were analyzed, the treatment experiences were summarized, and targeted suggestions were proposed. The results in this paper are helpful to improve the contract risk control ability of EPC projects.

Analysis on reason of larger vibration of bearing No.1 of 300MW steam turbine and treatment

MA Baohui, WANG Chunliang, NI Tao

2013, 35(12): 51-53.

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Abstract:Aiming at the larger vibration of bearing No.1 of the turbine in a company under high load, the shaft center adjustment and the shaft load distribution of the unit No.1 during its heatsupply reformation were analyzed, and the adjusting measures were formulated. Using the unit reformation opportunity, the similar problem of unit No.2 was treated too. The larger vibration of bearing No.1 of the units was solved, and safe operation of the units was ensured.

Resistance measurement of breaker loop of HGIS

ZHAO Jun 1, WANG Na 2, QIN Yusheng 1

2013, 35(12): 54-56.

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Abstract:In recent years, along with enlargement of the power grid scale, many EHV substations were built. Due to the pressures of environment protection and land occupation, a large quantity of gas insulated metalenclosed switchgear (GIS) was widely used in substation construction. The GIS is becoming indispensable equipment for substations. A mistake, which easily occurs in resistance measurement of breaker conducting loop of the hybrid gas insulated switchgear (HGIS), was analyzed, and some correct measurement methods and the matters needing attention in the measurement were summarized. The result in this paper can be used as reference for handling with similar problems.

Analysis on application of material transferring technology in belt conveyor system

WANG Libo, HUA Zhen

2013, 35(12): 57-58.

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Abstract:Combining with several materials with different properties, such as high abrasiveness and viscidity, aiming at the common problems of the material transferring link of belt conveyor system in engineering projects, which include the materials hitting each other and the belt lateral misalignment, a design scheme of structure of material transferring device was proposed. The scheme has some advantages, such as to reduce the attrition, to lighten impact of material on the downstream belt, to avoid material spilling and belt lateral misalignment and so on. The design scheme is helpful to keep fluent material conveying.

Analysis on reliability of import servo position controller for small turbine of 600MW unit

ZHOU Yingzhen

2013, 35(12): 59-60.

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Abstract:Taking the servo position controller for small turbine of 600MW unit of Huadian International Zouxian Power Plant as example, the way to improve its reliability was analyzed. Using the safety and stability ensuring measures of other controllers as reference, the loop of the servo position controller was perfected and improved, and the safety and reliability of the controller were ensured. So the safe and economic operation of the unit was ensured.

Analysis on reasons of high water content of byproduct gypsum of wet desulphurization system

Lv Xinshe

2013, 35(12): 61-63.

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Abstract:The limestonegypsum wet desulphurization technology is widely used in domestic large thermal power units, and its byproduct gypsum was used more and more widely. The water content of the gypsum is an important index for evaluating the desulphurization system operation. Taking the Qinghai Huadian Datong Power Generation Company Limited as example, the factors influencing on water content of gypsum in practical desulphurization system operation were analyzed. The result in this paper provides certain reference for improving the desulphurization gypsum quality.

Water quality control indexes for product water of seawater desalination by reverse osmosis process and water quality adjustment measures

ZHOU Jun

2013, 35(12): 64-65.

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Abstract:The corrosion mechanism of metal and main factors influencing on it were analyzed. The file GB/T 50619—2010 “Code for Designing of Thermal Power Plants Seawater Desalination System” was analyzed. The water control indexes for using the product water of seawater desalination by RO method as industrial water, which are suggested in the file GB/T 50619—2010, were interpreted, and several commonused water quality adjustment measures were introduced.

Discussion on technical scheme for canceling flue gas bypass in desulphurization system

ZHANG Xue

2013, 35(12): 66-72.

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Abstract:The common reformation schemes of canceling flue gas bypass at home were introduced, and the hidden trouble existing in reformed system was pointed out. Starting from the fundamental of desulphurization system without flue gas bypass, the current reformation schemes were analyzed and compared, and an optimized reformation scheme for canceling flue gas bypass was put forward.

Influence of cocombustion of coal and biomass on combustion emissions of circulating fluidized bed boiler

YI Zuyao

2013, 35(12): 73-76.

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Abstract:Using the software Aspen Plus, a cocombustion model of biomass and coal in circulating fluidized bed boiler was established. The law of cocombustion emission of biomass and coal under different conditions of the biomasscoal blended ratio, the combustion temperature, the moisture content of the biomass and the airfuel ratio was studied. The results are as follows: Along with increase of the moisture content of biomass, the emissions of combustion produced NO，NO2，SO2，CO and CO2 decrease, and the emissions of SO3 and H2O increase. Along with increase of airfuel ratio, the combustion temperature rises firstly and then falls, and the combustion temperature is highest when the airfuel ratio is 6. Under different combustion temperature, sulfur discharge characteristics are different. The volume fraction of SO2 decreases monotonically when the temperature is rising, and along with increase of the temperature, the volume fraction of NO increases firstly, and then decreases. Along with increase of biomass blended ratio, the emissions of SO2 and NO decrease.

Case analysis of incorrect action of main transformer differential protection

LIU Sen

2013, 35(12): 77-79.

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Abstract:Taking the incorrect action of the main transformer differential protection of a power plant as study object, the principle and functions of the RCS9671C transformer differential protection device and the current transformer antiopen circuit protection device, which are made in NR Electric Corporation Limited , were introduced. Combining with practical site situation, the reasons of incorrect action of the main transformer differential protection were analyzed, and televant antiaccident measures were proposed.

Exploration potential of Hunan shale gas bidding blocks won by China Huadian Corporation and expectation of “gaspopularized Hunan”

ZHU Jian1,2

2013, 35(12): 80-84.

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Abstract:The China Huadian Corporation took part in secondary round bid of shale gas exploration right organized by Ministry of Land and Resources and won the bids of Huayuan block and Yongshun block in Hunan province at the first try. The geological conditions, the quantity of shale gas resource and the favorable exploration area of the bidding blocks were analyzed. The analysis shows that the two bidding blocks have good shale gas exploration potential. The content of the exploration and estimation work and the stage targets were determined, which include to explore the reserves of the shale gas, to grasp the shale gas geological exploration and estimation technologies, to develop highyielding shale gas flow, to take part in construction of transmission pipe network actively, to develop the comprehensive utilization of the shale gas and to demonstrate a expectation of “gaspopularized Hunan”.

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