Integrated Intelligent Energy

Realization of automatic switchover from variable frequency operation to power frequency operation of fan and energy saving analysis

NIU Shusen;LI Xinjian;TIAN Yusen;SHEN Henan;ZHANG Zhixue

2011, 33(5): 1-4.

Asbtract ( 1176 )

Related Articles | Metrics

The implementation situation of variable frequency reformation of the three main fans (IDF, FDF and PAF) of Huadian Weifang Power Generation Company Limited was introduced. Through the dynamic test, the realization of automatic switchover from variable frequency operation to power frequency operation and automatic adjustment were expounded. The effects of variable frequency control, such as energy conservation and motor protection, were analyzed. By the variable frequency reformation of the three main fans, the house service consumption rate was greatly reduced, and better economical benefit was obtained.

Analysis on blade fall off accident of induced draft fan of power plant boiler

HU Zhijie

2011, 33(5): 5-7.

Asbtract ( 1167 )

Related Articles | Metrics

Due to continuous resonance, the fan blades of Huadian Qingdao Power Generation Corporation Limited were damaged, and this caused serious accident. Based on analysis, main reasons of the accident were found, and the method and measures to prevent similar accident were given.

Analysis on surging reasons of axial flow fan and countermeasures

ZHANG Guangdong

2011, 33(5): 8-9.

Asbtract ( 1750 )

Related Articles | Metrics

Due to complex rotor structure and multiple rotatable parts, there is larger risk of surge for axial flow fan; and the damage caused by the surge is also larger. According to the practical situation of the site, the surging reasons of the fan were analyzed. Some countermeasures were adopted, and the probability of the fan surge was decreased obviously.

Thermal control scheme of high voltage variable frequency reformation with automatic bypass for induced draft fan and primary air fan

CHEN Jianxin;HUA Zhaojun

2011, 33(5): 10-12.

Asbtract ( 1183 )

Related Articles | Metrics

The variable frequency reformation scheme for primary air fan and induced draft fan of CFB boiler in Yunnan Huadian Xunjiansi Power Generation Corporation Limited using highvoltage frequency converter with automatic bypass function was introduced. The modification of the control logic and the picture of DCS and the automatic control function optimization were expounded emphatically. After the variable frequency reformation of the primary air fan and the induced draft fan, the thermal control logic is perfect, the automatic control function can put into operation normally, the fan operation state can be switched over from variable frequency to power frequency or otherwise automatically. When the frequency converter is failure, the fan operation state will be switched over automatically to power frequency without turbulence and the unit load will not be impacted. The energy saving effect of the reformation is obvious.

Influence of integration extent of air separation unit on performance of IGCC system

CHEN Xiaoli;;ZHANG Dongxiao;WU Shaohua;GUO Bo;LI Wenying;LI Zhenzhong

2011, 33(5): 13-15.

Asbtract ( 1059 )

Related Articles | Metrics

The composition of the IGCC system was introduced. The selection of air separation process flow and the connection mode of air separation device with gas turbine system were expounded. Based on this, the influence of air separation unit integrated coefficient on the gas turbine and steam turbine was analyzed; and a mathematical model and calculation conditions were established. Under the calculation conditions, it was determined that the air separation unit integrated coefficient Xas=0.6 is the optimal extraction ratio of air compressor.

Analysis on reactive power compensation based on magnetic field variation of asynchronous motor in operation

WANG Heping;WANG Gang;ZHAO Xiaoxiao;SUN Jinguo;LI Weidong

2011, 33(5): 16-18.

Asbtract ( 1335 )

Related Articles | Metrics

The reactive power demand of asynchronous motor is mostly depended on the operation condition of its load. The exciting current variation of asynchronous motor from noload condition to stable onload condition was analyzed; and the analysis shows that the reactive power demand of the motor varies along with its operating mode. The reactive power compensation equipment for a motor must be selected according to its practical working mode.

Analysis on calculating method of steam leakage of diaphragm gland in steam turbine

HUANG Chunliang;CHEN Meiduan

2011, 33(5): 19-22.

Asbtract ( 1217 )

Related Articles | Metrics

The steam leakage of diaphragm gland influences on relative internal efficiency of steam turbine greatly. There are larger formal differences between current steam leakage calculation formulas for various diaphragm glands. The differences and the similarities of several frequentlyused steam leakage calculation formulas for various diaphragm glands and the applicable conditions for each formula were theoretically analyzed in depth; and a general formula of steam leakage calculation for diaphragm glands was given. Based on practical examples, the calculation results of various calculating formulas were analyzed.

Reformation of mutual supply of startup and standby high voltage auxiliary power between 300MW cogeneration units and analysis

WEI Qiang;WANG Jing

2011, 33(5): 23-27.

Asbtract ( 1312 )

Related Articles | Metrics

Based on the system investigation and the data processing, combining with the practical situation of Gansu Datang Xigu Cogeneration Power Corporation Limited ,the settlement method of the power grid and the power plant was studied. According to the study result, the startup and standby high voltage auxiliary power system for 330MW cogeneration units was reformed, and the mutual supply of auxiliary power between adjacent units was realized, which reduces the offgrid energy of the power plant.

Application of windproof and dust suppressing net in coal yard of Huaneng Weihai Power Plant project phase III

XU Dongmei

2011, 33(5): 28-30.

Asbtract ( 1053 )

Related Articles | Metrics

Combining with a practical windproof and dust suppressing net project installed in coal yard of Huaneng Weihai Power Plant project phase III, the performances of windproof and dust suppressing nets made of different materials were compared. The selection method of material for wind proof and dust suppressing net and the matters needing attention in construction were expounded. In Huaneng Weihai Power Plant project phase III, after the windproof and dust suppressing net was put into use, the coal dust loss can be decrease by 700 thousands RMB yuans in an year, favorable economical benefit and social effect were obtained.

Application of digital cabling technology for thermal control system in Shangwan Power Plant

CHEN Zhiqiang;XU Aidong

2011, 33(5): 31-34.

Asbtract ( 974 )

Related Articles | Metrics

Combining with the features of cabling engineering design for thermal control system in thermal power plant, the functions and application process of the cable laying software was expounded. The application of this software in practical project shows that the software has advantages in multiple aspects, such as improving work efficiency, increasing the design depth, increasing the accuracy of designed material amount, decreasing project management cost, reducing the risk of total contracted project, lightening labor intensity and eliminating human error.

Application of automatic voltage control system in power plant

SUN Zhifeng

2011, 33(5): 35-36.

Asbtract ( 1239 )

Related Articles | Metrics

The configuration principle of remote terminal unit and the control mode of automatic voltage control(AVC) were introduced. The structure and the control strategy of AVC substation system were analyzed. The factors must be considered in application of AVC system in power plant were pointed out, which can be used as reference for similar device application.

Analysis and treatment of emergency shutdown caused by higher temperature of radial bearing

WEI Leihua

2011, 33(5): 37-39.

Asbtract ( 1270 )

Related Articles | Metrics

An emergency shutdown of the generator set in a hydropower station caused by the higher temperature of the radial bearing was introduced. The reasons of the shutdown accident were analyzed. The accident lessons were summarized. The preventive measures were put forward, and similar accident can be prevented.

Analysis and treatment on faults of electrohydraulic control system in 150MW steam turbine

WEI Shengluan;WANG Haixia

2011, 33(5): 40-44.

Asbtract ( 1621 )

Related Articles | Metrics

The faults occurred in the electrohydraulic control system and the EH oil system of 2×150MW singlecasing tandem compound turbine of Panzhihua Branch of Huadian Sichuan Power Generation Corpration Limited were analyzed. After adopting relevant treatment measures the faults have been eliminated.

Application of soft starter in reformation of crusher control system

DAI Xiaojuan

2011, 33(5): 45-46.

Asbtract ( 976 )

Related Articles | Metrics

Various startup modes and operation characteristics of asynchronous motor were introduced. The damage caused by direct startup of crusher motor was analyzed. The reformation scheme with soft starter was adopted. The reformed crusher control system has many advantages, such as improving the torque and startup characteristics of the motor, reducing the startup current, decreasing the shock to the power system by the motor starting, lengthening the service life of the crusher and enhancing the utilization factor of the equipment.

Reformation of flow passage for introduce type domestic 300MW steam turbine

HONG Changshao;DUAN Xiaoyun

2011, 33(5): 47-50.

Asbtract ( 1782 )

Related Articles | Metrics

There are problems of lower efficiency and higher coal consumption rate in the domestic introduced type 300MW steam turbine of Guangzhou Zhujiang Power Plant. The necessity of flow passage reformation for the 300MW introduced type domestic steam turbine was expounded. After reformation, the efficiency of HP cylinder achieves 83.02%; the efficiency of IP cylinder achieves 91.19%; the heat rate is 7990kJ/(kW·h); the gross standard coal consumption rate of the unit decreases by 12.4g/(kW·h); 18 thousands tons of standard coal can be saved in a year. The main control parameters of the steam turbine, the boiler, the generator and auxiliary equipments are all in specified ranges; and the economical efficiency and the safety of the unit are improved significantly. 

Analysis on causes of water mixed in lube oil of FK5G32 feed pump

HUANG Cheng

2011, 33(5): 51-52.

Asbtract ( 1277 )

Related Articles | Metrics

In operation of four feed pumps, which are configured for 2×135MW unit of Guangdong Yuejia Electric Power Corporation Limited project phase III, some water, more or less, was mixed into lube oil. The equipment was analyzed in detail; and the main cause leading the water to be mixed into the oil was found. The bearing oil baffle of the feed pump was reformed, and the problem was solved thoroughly.

Configuration scheme of internal fault main protection of 600MW generator in Goupitan Hydropower Station

TU Yong;WANG Guilai

2011, 33(5): 53-56.

Asbtract ( 1312 )

Related Articles | Metrics

The generator of Goupitan Hydropower Station is first domestic air cooled large hydraulic generator. The main protection configuration scheme for the generator of Goupitan Hydropower Station was introduced, which can be used as reference for similar subsequent units and domestic related research and engineering application.

Analysis on feasibility of adding reactive power compensation device in small hydropower station

YANG Sisi

2011, 33(5): 57-57.

Asbtract ( 1254 )

Related Articles | Metrics

At the present stage, the major loads of small hydropower station are near region loads, and a large part of them is industrial loads, which consume large amount of reactive power. As a trial, the reactive power compensation technology was adopted to solve the problems of system reactive power absorption and too lower voltage in line tail end, and favorable effect was obtained.

Application actuality of industrialized flue gas mercury removal technology

汪洋;沈煜晖;陶爱平

2011, 33(5): 58-62.

Asbtract ( 1346 )

Related Articles | Metrics

The flue gas mercury removal technologies of America, which can be used in industrialization scale, include two technologies, one of them is activate carbon injection technology based on precipitator, and the other is the catalytic oxidation technology based on flue gas desulphurization equipment. The technological superiority of the computation fluid dynamics was analyzed. A design example was introduced, in which the computation fluid dynamics method was used in flow field simulation for guiding the design of the gas duct, the reactor and the injection system. The example provides some references for future mercury removal projects in our country.

Experimental study on additives for limestone wet desulphurization

MO Junwu;GUO Fuming

2011, 33(5): 63-66.

Asbtract ( 1278 )

Related Articles | Metrics

Several key parameters influencing on flue gas desulphurization efficiency were analyzed. The functions and theory of the desulphurization additives were introduced. In the Jiangsu Huadian Yangzhou Power Generation Corporation Limited, in order to enhance the desulphurization efficiency and reduce the auxiliary power consumption rate, the additives experiment was carried out. After additives were added, one slurry circulating pump can be shut down, and the average desulphurization efficiency can achieve higher than 90%, which is increased obviously. Some matters needing attention in using of additives were given as reference for other power plants in their additives experiments.


Application of glass fiber reinforced plastics in chimney anticorrosion

XU Bin;TIAN Lijuan

2011, 33(5): 67-69.

Asbtract ( 1053 )

Related Articles | Metrics

The anticorrosion of chimney of coal fired power plant domestic and overseas was introduced. Several frequentlyused chimney anticorrosion schemes were compared. It was proposed that to use the glass fiber reinforced plastic (FRP), which has advantages of smaller density, higher strength, wear resistant, anticorrosion, finer surface finish and easy to machining, as internal cylinder material of wet chimney in desulphurization system without bypass and GGH; and some problems needing to be solved in application of FRP chimney were pointed out. 

Optimization of wastewater treatment in limestonegypsum wet FDG system

LI Xinfa;WANG Zutao

2011, 33(5): 70-73.

Asbtract ( 1429 )

Related Articles | Metrics

The importance of desulphurization wastewater treatment was expounded, and the traditional method of wastewater treatment and its problems were introduced. Aiming at the situation of the desulphurization wastewater treatment of the Huadian International Zouxian Power Plant, a desulphurization wastewater discharge scheme was put forward, in which the special wastewater treatment system will be changed to the wastewater discharging mixed with slurry. After the reformation, the pollutant content in the wastewater is reduced, the scaling and blockage of the slurry pipe have been alleviated, and the purposes of energy conservation and environment protection were realized. 

Main circuit design and device type selection for doublefed wind power generation unit

SHA Yuting;WANG Bin;YANG Weimin

2011, 33(5): 74-76.

Asbtract ( 1271 )

Related Articles | Metrics

The main type of current wind power generation units is the doublefed unit. The stator and the rotor of this type unit can feed out energy simultaneously; and this feature determines that the design of the main circuit and the device type selection for this type unit are more complex than that of other asynchronous or synchronous machine unit. The working principle of the main circuit of doublefed wind power generation unit was analyzed, and taking a 1.5MW doublefed unit as studying object, the typical design of the main circuit structure was given, and the electric circuit parameters of various parts of the main circuit were analyzed. Based on this, the device type selection scheme of various parts of the main circuit was recommended. The scheme was adopted in practical product manufacturing, and the desired effect was obtained.

Table of Content