Integrated Intelligent Energy

The successful experience analysis of benchmarking management

CAO Jianbing;LI Jianliang;ZHAO Zuoqi;QI Fang

2008, 30(12): 1-5.

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According to the major indicators data of Huadian Baotou Generation Corporation Limited at the first half of 2008 and the same period of last year, the variation reasons of various indicators, which includes generated electricity, house service consumption rate, comprehensive house service consumption rate, gross coal consumption, net coal consumption, comprehensive net coal consumption, utilized hours, oil consumption and others, were analyzed, and the measures adopted were described. The midyear summary of various indicators accomplishment case in Benchmarking Management Year was provided which is useful for better work of the left half year to accomplish annual indicators, and the operation indicators will raise with the process of comparing to advanced, checking error and correcting malpractice and continuous improvement.

Application of tinyoil ignition technology in a power plant

ZENG Lingda;;ZHANG Xinyao;CHEN Qijuan

2008, 30(12): 6-9.

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As an oilsaving measure in benchmarking management activity, the technical reformation of the burner of boiler No.2 in Hubei Xisaishan Generation Corporation Limited was introduced, in which the gasified small oil gun ignition technology and combustion stabilizing device were used. According to the pulverized coal burning theory, combining with coal quality fired in the plant practically, the original, louvered, horizontal and concentrateddiluted burners in corners No.1～No.4 were removed and replaced by tinyoil ignition pulverizedcoal burners. The operation practice after reformation shows that the new ignition system can ignite pulverized coal reliably and can keep stable combustion, and then the obvious oilsaving effect was obtained.

Study and practice of information technique applied in the fuel benchmarking management of coalfired power plant

ZHAO Xueshan;LI Jianliang

2008, 30(12): 10-13.

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The fuel management information system of Huadian Zibo Thermal Power Corporation Limited was introduced in detail. The sample pick, sample preparation and chemical examination management subsystem is used to collect the realtime data of coal, in which the two time code mode is used to avoid the influence of subjective factors. According to the information of coal receiving, coal consumption, coal stock and others, the system creates analysis trend graph to show the results of coalsaving brightly. The system is also used to optimize the coal blending. The information of coal stock, coal blending and coal consumption were collected, traced and saved, the typical coal blending experiment was completed. By using the data of energy consumption analysis subsystem and the sample pick, sample preparation and chemical examination management subsystem, online industrial experiment of coal blending was down. The combustion optimization was combined with coal receiving, coal stock and coal blending processes. The system can provide the full procedure information of fuel for production management parts to work out optimum digital coal blending model dynamically. Based on that abovementioned, good result of fuel management was obtained.

The reason of high consumption of acid and alkali for desalting chemical water handling system and the countermeasures

LI Changzhi;DUAN Bo

2008, 30(12): 14-17.

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The factors influencing on consumption of acid and alkali for ion exchange resin regeneration were analyzed. The reasons of high acid and alkali consumption in Fularji General Power Plant and relevant countermeasures were expounded in detail. In order to prevent and decrease the pollution of ion exchange resin, a new resin cleaning method was proposed which integrates the traditional chemical medicament cleaning and ultrasonic cleaning technology. The working exchanging capacity of ion exchange resin was raised and the consumption of acid and alkali was reduced by using the new cleaning method.

Development and application of economical operation optimizing management system in Harbin Third Power Plant

ZHENG Songling;QIAO Taimin;LI Shuchen

2008, 30(12): 18-20.

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The development and application of economical operation optimizing management system in Harbin Third Power Plant were introduced, the functions of each module of the system were analyzed, and some threads for perfecting the system were put forward. The system is helpful for energysaving benchmarking management.

小波包分析及高斯混合模型在汽轮机振动故障诊断中的应用

LUO Mianhui;LIANG Xiao

2008, 30(12): 21-23.

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A turbine vibration faults diagnosis method by using Gaussian Mixture Models was proposed. The original turbine vibration faults signal is decomposed and reconstructed by wavelet packet analysis method, which act as a filter. Then the character of the vibration signal is picked up and used to set up the GMM. For each fault situation, taking its several set of the fault data as training data, an identifying cell for this fault situation is created. The maximum likelihood estimation of parameter of identifying cell is solved with EM algorithm. At last, the unidentified data is input to every identifying cell, and the maximum probability cell is found out, and the fault of this cell is the last diagnosis result.

Finite element analysis of static intensity of waterfilled rubber dam body structure

ZOU Yi;GAO Jianhe;ZHANG Yanbing;YE Liang

2008, 30(12): 24-27.

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According to body material of rubber dam body and the load bearing features of its structure, using MooneyRivlin material model of the dam bag and the finite element method for membrane structure, the static finite element analysis calculation for rubber dam body was accomplished, and the design scheme for dam body structure was researched.

Study and application of balancing method for ring hammer coal crusher

WANG Qi

2008, 30(12): 28-30.

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The field principles of single side and double side dynamic balance were introduced, the mathematic calculation formulas and realization method by computer programming were proposed. The effectiveness of the method was proved by experimental data. The method is simple and effective, and can be accomplished by using only one phase sensor and one acceleration sensor.

Typical design analysis of 110kV level double circuit steel tower with zero shielding angles

YANG Wugai;CHEN Zhaomeng 

2008, 30(12): 31-34.

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Aiming at the lower lightning withstanding level of 110kV overhead line in Fuzhou area, for the purpose of decrease the rate of shielding failure, a typical design scheme of steel tower with zero shielding angles was put forward. The selection of lead arrangement mode, the analysis of lightning protection performance and optimization of tower structure in the typical design were discussed emphatically, and the synthetically economic and technical target of the designed steel tower were compared and analyzed.

The features and new development of electric precipitation technique in coalfired power plant

YANG Junchao;GAO Xianglin

2008, 30(12): 35-37.

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The features of electric precipitation technique in coalfired power plant of our country were analyzed. The efficiencyraising and energysaving voltage power source of precipitator was described, due to the development and promotion of which, the EP goes into high efficiency and low energy consumption age from highefficiency and high energy consumption age. Based on continuous innovation in electric precipitation technique, the electrostatic precipitator would be constructed as energysaving, low carbon and green environmentprotective equipment.

Research on plan of pneumatic ash conveying and fly ash comprehensive utilization

KONG Lingming;SONG Jilin;ZHAO Haiming;MENG Fansen

2008, 30(12): 38-41.

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The dry ash removal technology and situation of fly ash comprehensive utilization at home and abroad were studied. Combining with the practice of Mudanjiang Second Power Plant of Huadian Energy Corporation Limited, the pneumatic ash conveying plan of electric precipitator in boiler No.7 was researched. The fly ash comprehensive utilization and its economic benefit were analyzed. And some problems that should be paid attention to in the pneumatic ash conveying system were pointed out.

Electrical connection scheme analysis of auxiliaries variable frequency reformation in power plant

LUO Guiying;CHENG Liang;YU Lifan

2008, 30(12): 42-44.

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The significance of auxiliaries variable frequency reformation was presented. The electrical connection schemes of variable frequency speed control system were analyzed and studied. According to the comparison between two electrical connection schemes, the scheme of One Towing Two was recommended. Then the auxiliaries of power plant operated at optimum status by using the variable frequency speed control system, the equipment operation efficiency was raised, and the purpose of energysaving was realized.

Optimized adjustment of combustion in circulating fluidized bed boiler

SHI Haifeng;CUI Liancheng

2008, 30(12): 45-47.

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The optimized adjustment of combustion has important guiding significance for circulating fluidized bed boiler operation. Combining with practical operation of Henan Lianfu Power Plant, according to the experiment in long time, the parameters influenced boiler combustion were optimized, and proper operation parameters were obtained. The results can be used as reference for combustion optimization plan.

Heat dissipation reformation of main transformer cooler

CHEN Yu;DONG Yiwei;WU Lianzhou

2008, 30(12): 48-50.

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The reformation necessity of cooler of main transformer No.2 in Shitang Hydropower Station was introduced, the reformation scheme was described. The cooling effects of main transformer No.2 cooler before and after reformation were compared. The temperature variations of main transformer at 2006 year and 2007 year under typical operation condition were compared. The cooling effects under different condition during cooler reformation process were analyzed, and the perfections were accomplished stage by stage, so the optimum economic effect of the reformation project was obtained.

Design of condition based maintenance system of electric power equipment

DENG Nanmin

2008, 30(12): 51-52.

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Implementation of equipment condition based maintenance in electric power enterprises is an inevitable trend. The design method of equipment condition based maintenance system was introduced. The function and core techniques of the system were described, which includes the main information source of system database, main techniques adopted in this system and the association between the system and information system. The matters needing attention in procedure of condition based maintenance were pointed out.

Analysis and treatment of rotor winding earth fault of hydroelectric generator

LIN Shaolin

2008, 30(12): 53-55.

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The rotor winding earth fault is not occurred commonly if the generator maintenance is perfect, but there are something could cause the fault which includes the ageing of generator, the absent of scientific and effective maintenance and defects left over in manufacture etc. Grasp of scientific, rational detection method is helpful to eliminate the fault fast and easily.

Reformation of mechanical hydraulic speed governor in hydropower station

ZHENG Xiaoqin;ZHOU Yuling

2008, 30(12): 56-57.

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The problems existed in speed regulating device of a hydropower station were analyzed, and improvement scheme was put forward. Its mechanical hydraulic speed governor was reformed into microcomputer controlled stepbystep hydroturbine governor, so the performance indicators of station regulating system reached the regulation in GB 9652—88, and the purposes of energysaving and efficiency improvement were realized.

The principle of hydraulic hoister of flood discharge gate in an equalizing reservoir and its fault treatment

JIAO Yufeng;DAI Yongxin;YANG Jibin

2008, 30(12): 58-61.

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After damming and impoundment of Xiaolangdi Xixiayuan Equalizing Reservoir in 2006, the reservoir had taken part in the water sediment regulation during two years favorably, and its equipments were operated in good condition. But some problems occurred in headstock gear of flood discharge arc gate due to the frequent operation, which includes creep and nonuniform speed. The principle of hydraulic headstock gear of flood discharge gate and its faults were introduced in detail, and some concrete measures for treatment of the faults were proposed.

Analysis of electricity quality problem under condition of electricity market

QIU Kun

2008, 30(12): 62-63.

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Along with the development of the electricity market, both power sector and users are aware clearly that electricity, as a special commodity, must be of high quality. The situation, electricity quality and support services under condition of electricity market were analyzed, and the results can offer reference for the power supply corporation to increase electricity quality and to reduce power supply cost.

Application of constant tension control system in line stringing construction

MA Shoufeng;ZHAI Fei;LIU Jianfeng;JIN Hongzhuan;LI Linfeng

2008, 30(12): 64-65.

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Along with the application of large crosssection conductor in extrahigh voltage grid construction, the demands of transmission line construction technology are raising continuously, the demands of construction quality are becoming higher and higher. The application of constant tension control system in line stringing construction can ensure the relaxation degrees of tension stringing conductors to be identical, can keep the tension to be steady, can ensure the tensions of each conductor of multibundle conductor to be identical, can ensure the accuracy of tension to keep constant while the speed of stringing is varying and can realize tension synchronously control, so the construction quality can be raised.

Reformation of auxiliary power fast transfer device

RUAN Junhao

2008, 30(12): 66-69.

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In the original design of failure automatic transfer device for standby auxiliary power source in Meizhouwan Power Plant, the transfer was realized by the auxiliary connects of working power source switch which connected to the closing circuit of standby power source. The auxiliary loads outage faults were occurred repeatedly during automatic transfer process due to the long transfer time of the auxiliary power source. The features of auxiliary power supply transfer circuit of Meizhouwan Power Plant were introduced. The experience of transfer circuit technical reformation, which was realized by adding ABB SUE3000 fast transfer device, was analyzed and summarized. The experiment and transfer waveform after reformation show that the auxiliary power supply transfer speed increased remarkably after reformation.

Research of reactive compensation of 10kV distribution line

GUO Rui

2008, 30(12): 70-72.

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The problems existed in reactive compensation of 10kV distribution line were discussed and improvement measures were adopted. For the single compensation device, the power factor was reached optimum effect by using the optimized control theory. For multipoints cooperative reactive compensation, according to the features of the line, the optimum compensation points were found by calculation, and the multicompensators cooperative control was realized by using the dynamic programming method, so the loss of the line was minimized.

Study on operation and maintenance of 10kV relay protection equipment

JIAO Yuzhen

2008, 30(12): 73-74.

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10kV relay protection equipment is important part of power system, and its safe, stable and reliable operation is significant for hole system normal operation. The operation and maintenance of 10kV relay protection equipment were studied, and some problems needing attention in practical operation were pointed out.

Design of temporary stack for retrofitting project of wet FGD

FAN Yanxia;ZENG Hui;ZHANG Hua;WANG Jite

2008, 30(12): 75-77.

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In retrofitting project of wet FGD for coalfired power plants, the original stack need to be upgraded for corrosion resistance due to that the GGH will be eliminated. In order to avoid its influence to the operation of main units, it is necessary to construct a temporary stack. In this article, two methods for construction of temporary stack widely used in actual projects were introduced, and the methods can also be used as good reference for similar project.

Study on the control system of refuse incineration power plant

BAI Xiaoxu

2008, 30(12): 78-80.

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The system composition and process flow were introduced based on the features of refuse incineration power plant. The detailed analysis has been made on the control system of domestic refuse incineration power plant; the difficult points of the combustion control of garbage incinerator, water level control of steam drum have been discoursed.

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