Integrated Intelligent Energy

Energysaving reformation of excitation brush holder of generator in domestic 600MW unit

HOU Jian

2011, 33(12): 0-0.

Asbtract ( 859 )

Related Articles | Metrics

Due to that the structure of the brush holder is not designed rationally, the effective usable part of the carbon brush is very little, and the daily maintenance work of the generator excitation carbon brush increases. The design and installation of the carbon brush of several manufactures and the practical use effects in enduser site were investigated and compared. Combining with the trial use status of the carbon brush in Baotou Power Generation Branch of Huadian Inner Mongolia Energy Company Limited, an energysaving reformation scheme of the brush holder was selected finally, in which the plugin constant pressure brush holder with double controlled and detachable springs wasadopted. After the reformation, favorable energysaving effect was obtained.

Development prospects of power grid and power system technology in changes with renewable energy

ZHOU Xiaoxin

2011, 33(12): 1-3.

Asbtract ( 1199 )

Related Articles | Metrics

The development prospects of smart power grid and power system technology under the background of fast developing of new energy and renewable energy were described. The concept of three generations of power grid and their developmental stages were explained; and the developmental processes and prospect of China's power grid were expounded. The key technologies of new generation power grid, which are springing up now, were introduced.

Analysis on feed water control strategy of 600MW supercritical WShape flame boiler unit

GUO Tongshu;ZHAO Ming;ZHU Nengfei;LI Lei

2011, 33(12): 4-7.

Asbtract ( 1079 )

Related Articles | Metrics

The features of the 600MW supercritical Wshape flame coalfired power unit of Huadian Sichuan Gongxian Power Generation Company Limited were analyzed. The object properties and control difficult points of the supercritical unit were introduced; the tasks, the structure and the control strategy of the water feeding adjustment system were described. Based the original design, the adjustment system was improved and optimized; and favorable effects were obtained in practical application.

Selection of drive mode of induced draft fan for 660MW ultra supercritical unit

QI xuan;CHENG Zutian;ZHANG Jinkui;LI Lei

2011, 33(12): 8-11.

Asbtract ( 1182 )

Related Articles | Metrics

The drive mode of the induced draft fan by steam turbine and the drive mode of the induced draft fan by electromotor were analyzed. The technical characteristics and the economic performances of the two drive modes were compared. A suggestion about the Selection of drive mode for induced draft fan of 660MW ultra supercritical unit was given.


Analysis on layout scheme of turbine building for 600MW grade thermal power unit

GAO Zhenbao;YANG Junbo;ZHANG Lechuan;HU Xundong;LI Lin

2011, 33(12): 12-14.

Asbtract ( 1102 )

Related Articles | Metrics

The optimization of the turbine building layout in thermal power plant is mainly developed centering on arrangement of the deaerator. Taking domestic 600MW grade thermal power unit as example, the technical characteristics, the economical efficiency and the applicability of several layout schemes of turbine building (deaerator room) with advanced indexes were analyzed; and some matters needing attention in design were put forward, which can be used as reference for engineering design and selection for investors.

Analysis and control of steam overtemperature in separated platen superheater outlet of 600MW supercritical boiler at initial startup stage

XIAO Lizheng;LIU Xiaojun

2011, 33(12): 15-17.

Asbtract ( 940 )

Related Articles | Metrics

The attemperating water system is not designed in the inlet of the separated platen superheater of the 600MW supercritical boiler manufactured in Shanghai Boiler Works Corporation Limited. At the initial startup stage of the boiler, due to the plasma ignition and the larger heat loss of the boiler in wetstate operation stage, the steam temperature in outlet of the separated platen superheater is easily exceeded the limit. Aiming at this problem, based on analysis and site practice, the effective method to control the outlet steam temperature was found.

Analysis on brown coal blended burning in 600MW ultra supercritical boiler

XIA Xuemin

2011, 33(12): 18-19.

Asbtract ( 1075 )

Related Articles | Metrics

The problems and the potential risk caused by brown coal blended burning were analyzed. Aiming at the problems, which were happened or may be happened, the solution and suggestion were put forward. The significance of the brown coal blended burning for thermal power plant to eliminate the deficits and control losses was evaluated; which provides reference for brown coal blended burning.

Energysaving reformation of excitation brush holder of generator in domestic 600MW unit

HOU Jian

2011, 33(12): 20-20.

Asbtract ( 1035 )

Related Articles | Metrics

Due to that the structure of the brush holder is not designed rationally, the effective usable part of the carbon brush is very little, and the daily maintenance work of the generator excitation carbon brush increases. The design and installation of the carbon brush of several manufactures and the practical use effects in enduser site were investigated and compared. Combining with the trial use status of the carbon brush in Baotou Power Generation Branch of Huadian Inner Mongolia Energy Company Limited, an energysaving reformation scheme of the brush holder was selected finally, in which the plugin constant pressure brush holder with double controlled and detachable springs wasadopted. After the reformation, favorable energysaving effect was obtained.

Design features of valveless bypass of condensation water precision processing system in nuclear power station

WANG Zhengping;WANG Jianhua

2011, 33(12): 21-23.

Asbtract ( 847 )

Related Articles | Metrics

The process flow of the conventional condensation water precision processing system was introduced. The design features of valveless bypass and conventional bypass were analyzed. Starting from the angle of bypass design in unit thermodynamic system of power station, the security problem of the unit was discussed. The design idea of valveless bypass, the operation mode and the key equipments type selection for the nuclear power station were expounded emphatically.

Analysis and treatment of the overtemperature of hydraulic turbine guide bearing

GUO Shitian

2011, 33(12): 24-27.

Asbtract ( 1257 )

Related Articles | Metrics

The overtemperature of the turbine guide bearing of the hydraulic generator set No.2 in Liuxihe Hydropower Plant was introduced. The reasons may cause the overtemperature of the turbine guide bearing of the hydraulic generator set were analyzed. The relevant technical measures were put forward, and the overtemperature problem of the turbine guide bearing was solved thoroughly.

Study on selection of ultra filtering membrane for sea water desalinization

XU Xiuping;DONG Zhengshuai

2011, 33(12): 28-30.

Asbtract ( 1064 )

Related Articles | Metrics

At present, some problems exist in domestic already running membrane method sea water desalinization systems; especially, in the sea water desalinization systems using ultrafiltration as pretreatment, the problems are more serious. Depending on the field test investigation on sea water ultra filtering membrane of a power plant in Shandong, the State Nuclear Electric Power Planning Design & Research Institute had completed the performance verification and comparison of different brands ultra filtering membranes of the power plant and obtained the related experimental data, which are helpful for selection of ultra filtering membrane.

Dewatering technology for deep foundation pit of wagon tripper room area in soft soil stratum

LIU Maoxun;LI Xiangyuan

2011, 33(12): 31-35.

Asbtract ( 774 )

Related Articles | Metrics

Along with increase of design of underground structures with large size, the difficulties of deep foundation pit excavation and dewatering are increased. In the 2×1000MW aircooled unit of Huadian Ningxia Lingwu Power Generation Company Limited project phase II, the depth of the foundation pit of wagon tipper room is about -16.00m. In the foundation pit dewatering construction for this area, the annular tube well dewatering technology was adopted. After the implementation of the dewatering construction, the ground water level is lowered obviously; and the consolidation of the soil body of excavated foundation pit was favorable and can satisfy the design requirement. The implementation of this technology provides some experiences for structure foundation pit dewatering in soft soil area with larger pit depth, rich ground water and higher ground water level.

Time synchronization scheme for smart grid

YANG Jingyu

2011, 33(12): 36-35.

Asbtract ( 1108 )

Related Articles | Metrics

The time synchronization for the smart grid must have high accuracy and high safety. According to this requirement, a time synchronization scheme for smart grid was given. In this scheme, the power system time synchronization technology, in which the Beidou/GPS dual mode timing and the protocol IEEE1588 are combined, was adopted. According to the differences of operation mode and desired timing accuracy, different time synchronization configuration schemes suitable for the master station and suitable for substations were given respectively. Then the time synchronization of whole smart grid was realized.

Calculation of the critical rotating speed and unbalance response of steam turbine rotor

DING Feng;GUO Qunlong

2011, 33(12): 39-40.

Asbtract ( 909 )

Related Articles | Metrics

Based on numeric simulation, the critical rotating speed of the steam turbine rotor was calculated. The influence of the position, in which the unbalanced mass exists, on the vibration amplitude under working rotating speed was analyzed; and the relation between the vibration amplitude and the position of unbalanced mass was obtained.

Application of Quantum PLC control system and software IFIX in auxiliary system of power plant

XIAO Jiangkai

2011, 33(12): 41-43.

Asbtract ( 1063 )

Related Articles | Metrics

Taking the application of Quantum PLC control system in auxiliary system of 2×300MW unit of Henan Luoyang Wanji Power Plant as example, the hardware configuration and network structure of the system and concrete application of lower level software UnityPro and upper level configuration software IFIX were analyzed. The application results of the Quantum PLC control system and the upper level configuration software IFIX in Henan Luoyang Wanji Power Plant show that based on ensuring of the system realtime and stability, a stable, reliable and rational control system had been built, the project cost was reduced effectively, and favorable results were obtained.

Analysis and treatment of a special accident of MDG366 type feed water pump

LIU Junling;;HAN Zhonghe;WANG Kun

2011, 33(12): 44-45.

Asbtract ( 1089 )

Related Articles | Metrics

The structure features of the MDG366 type feed water pump were introduced. Due to collision and friction, the balancing sleeve of the feed pump had dropped; and this caused the throughflow of the pump interrupt; so a serious thrust bearing overburning accident had occurred. The process of the accident was described. The reason of the accident was analyzed. Some relevant treatment measures were adopted, and the design was improved successfully. The maintenance and operation measures for preventing similar accident were put forward.

Treatment and analysis of circulating cooling water by adding chemicals

TAN Mingde

2011, 33(12): 46-47.

Asbtract ( 1069 )

Related Articles | Metrics

The static and dynamic tests of circulating water treatment system of Huaneng Henan Zhongyuan Gas Power Generation Company Limited were carried out. The traditional convention of water quality data analysis was broken down; the online circulating water control system was imported from the Ashland Inc. of U.S.A; and the dynamic analysis of corrosion speed and scaling data of the heat exchanger was realized. This analysis method can be used as reference in domestic similar circulating water treatment.

Analysis on reason of weld seam cracks of SA213-T23 steel and treatment

WU Hongtao;GENG Debiao;TANG Yong;FENG Lizhong

2011, 33(12): 48-50.

Asbtract ( 1269 )

Related Articles | Metrics

The reason of the weld seam cracks of SA213-T23 steel was introduced. The metal physical and chemical analysis for the cracked weld seam of SA213-T23 steel was carried out. Due to that the weld seam cracks have the features of reheated cracks, it related closely with the structural stress, residual stress by welding to prevent the weld seam cracks of SA213-T23 steel in the operation once more,operating the bonding technology strictly and optimizing the operation mode were suggested.

Analysis on calculation accuracy of state estimation function

LI Kelin

2011, 33(12): 51-53.

Asbtract ( 1031 )

Related Articles | Metrics

According to the operation situation of the state estimation function of the PAS, the power application software of the Dispatch Center in Shantou Power Bureau, starting from the problems, which are encountered in daily maintenance and influencing on the calculation accuracy of the state estimation, the method to increase the calculation accuracy of the state estimation was expounded. The method is greatly helpful for increasing the calculation accuracy of the state estimation.

Measures to reduce wearout of carrying belt by plough unloader

XIE Wujie

2011, 33(12): 54-55.

Asbtract ( 1079 )

Related Articles | Metrics

The wearout of the carrying belt of coal handling system by the plough unloader was introduced. The reason of the wearout was analyzed. An improvement scheme was put forward. The idea and the method for upgrading of the coal plough unloader were pointed out.

Application of integrated device of sampling and online detecting for asreceived coal

ZHAO Yashan

2011, 33(12): 56-57.

Asbtract ( 791 )

Related Articles | Metrics

Three ash content online measuring devices based on different principle and two moisture measuring devices based on different principle for coal were introduced. Based on this, the theory of online detecting device of coal was expounded; the concept of integrated device of sampling and online detecting for asreceived coal was put forward and realized in engineering practice. By using the new integrated device, the economical benefit of power plants can be enhanced effectively.

Comparison of ammonia preparing scheme for deNOx system of thermal power plant

MA Qianli

2011, 33(12): 58-59.

Asbtract ( 1176 )

Related Articles | Metrics

In thermal power plants, there are four types of ammonia supply sources for SCR deNOx devices, which are the liquid ammonia, the aqueous ammonia, the pyrolyzed urea and the hydrolyzed urea. According to technical and economic comparative analyses, it was confirmed that in the investment cost, the operating cost, the operation and management safety and other respects, the pyrolyzed urea and the liquid ammonia have advantages and disadvantages respectively, and they all can be used as appropriate ammonia supply source for large unit.

Preparation technology of deNOx reducing agent for SCR method

LIU Yu;LIU Qiang;GAI Dongfei

2011, 33(12): 60-62.

Asbtract ( 1123 )

Related Articles | Metrics

There are two methods, the liquid ammonia method and the urea method, to prepare the deNOx reducing agent for selective catalytic reduction deNOx method currently used in our country. Taking the deNOx project of Xinjiang Hefeng Power Plant as example, the characteristics of the two reducing agent preparation technologies were analyzed; and the reducing agent preparation technology suitable to a concrete project was discussed.

Development of domestic deNOx technology and the analysis on technical economy

ZHAO Shengguo;HU Yongfeng

2011, 33(12): 63-66.

Asbtract ( 1044 )

Related Articles | Metrics

The requirement of NOx control and the deNOx technical policy in our country were introduced. The development and application of the low NOx combustion technology were described. The development of flue gas deNOx technology and catalyst in our country were expounded. The features and operation situation of the built deNOx projects were illustrated. The technical and economic features of different deNOx technologies were compared, which can be used as reference for deNOx project development.

Benchmarking of energyloss index of coalfired power unit

FENG Zelei

2011, 33(12): 67-68.

Asbtract ( 889 )

Related Articles | Metrics

The energyloss indexes were introduced into the benchmarking of the coalfired power unit; and a concept of energyloss benchmarking was proposed. The collection of operation values, the confirming of target values and the calculation method of the energyloss under different operation parameters were expounded systematically. Combining with the example of energyloss benchmarking of China Huadian Corporation, the advantages of the energyloss benchmarking and the necessary functions of the energyloss benchmarking system were illustrated.

Study on micro sitting in complex terrain for wind farm based on fast investment estimation and costbenefit model

FAN Wei;ZHONG Tianyu;LIU Qingchao;LI Yi

2011, 33(12): 69-72.

Asbtract ( 858 )

Related Articles | Metrics

Micrositting is the key link of wind power generation technology, and it relates to the operation benefit of wind farm directly. Under the condition of complex terrain, the investment for road and power transmission line will be larger; it must be considered to get optimal comprehensive indicators, such as the electricity generating capacity, the investment benefit and etc. In current micro sitting softwares, the principle of wind turbine location is to get maximum electricity generation only. However, some other influencing factors, such as the turbulence intensity, the inflow angle, the comprehensive cost and the economic benefit, must be considered. Taking the micro sitting scheme of a wind farm in complex terrain as example, the fast investment estimation and costbenefit model was established. By using the model, sevoral schemes were compared and analyzed, and an optimal scheme was determined finally. By this example, the practical applicability of the model was verified.


Application of frequency converter in wind farm

GUO Dihua;WU Xiumiao;YANG Xu

2011, 33(12): 73-77.

Asbtract ( 1155 )

Related Articles | Metrics

The basic theories of the backtoback dualPWM doublefeed frequency converter and the full power frequency converter were introduced. The action mechanism of the frequency converter during startup and normally operation of the generator in wind power generation system and abnormal condition of the power grid was analyzed, which provides certain reference for further research on frequency converter more suitable for wind power generation system.

Influence of domestic wind power generation on operation of power grid

WANG Chuanbo;SHU Sadong;BI Xiaoying

2011, 33(12): 78-80.

Asbtract ( 1173 )

Related Articles | Metrics

The influence of domestic wind power generation on the operation of the power grid was analyzed. The solving measures for coordinated development of wind power generation and power grid operation were put forward. After these measures were implemented, the influence of the wind power generation on the safety and stability of the power grid was decreased; and the maximization of the benefits of the wind power generation stations and the power grid enterprises was ensured.

Table of Content