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中文
Table of Content
25 February 2015, Volume 37 Issue 2
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Method to propel progress of energy efficiency of China
DENG Jianling
2015, 37(2): 1-3.
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Abstract:The energy structure features of China were analyzed. Starting from the angles of improving the energy efficiency, reducing the pollutant emission and protecting the environment, under the premise of ensuring economy development and reducing pollutant emission, an idea of “end treatment of stock assets and beforehand control of new increment assets” was put forward. It was suggested to establish the energy efficiency examination mechanism with indexes of region GDP value per kW•h electric energy consumption and energy consumption per 10000 yuan GDP. In addition, the utilization of the renewable energy must be increased. Above measures can propel progress of energy efficiency of China.
Study on description method of secondary virtual circuit object information model for smart substation
JI Ling1, LI Zhongming1, JIANG Yanjun1, QIU Yutao2, QIU Qunhui3, JIANG Weijian3
2015, 37(2): 4-8.
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Abstract:The composition of secondary virtual circuit of smart substation was introduced. Referring to the description method of primary topology of the substation, the virtual secondary circuit objects of the secondary equipments and their circuit connection relations were expounded. A set of description methods of secondary virtual circuit object information model for smart substation was established, which provides model foundation for the visual state monitoring and the realization of various advanced application functions of the secondary virtual circuit of the smart substation.
Research on phosphating technology for pipes of rotating electric machines in nuclear power station
LI Ge
2015, 37(2): 9-12.
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Abstract:According to the rust prevention requirement of the pipes of rotating electric machines in nuclear power stations, a detailed phosphating technology process was developed.The problems occurred in implement of the technology process, such as the overetching, the unevenness of phosphating film and the rerust after phosphorization, were researched experimentally, and the optimal proportion of the acid washing liquid and the best phosphorization agent were obtained. The problem of rerust after phosphorization was solved. The results in this paper provide reference for phosphating of similar equipments in nuclear power stations.
Use of fuzzy linear weighting method to solve economic dispatch problem of power system
GUO Zixue, ZHENG Yumeng, WANG Shichao
2015, 37(2): 13-15.
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Abstract:The power system economic dispatch is multiobjective, and in practice, the importance of each objective function is different. Aiming at above situation, a fuzzy linear weighting method for solving economic dispatch problem of power system was proposed. In this method, the linear weighting method is used in the membership functions of each objective function to solve the economic dispatch problems of power system, and the Lingo software is used in example simulation. The solutions of the fuzzy linear weighting method and the minimax method were compared, and the comparison results show that the fuzzy linear weighting method is more suitable for practical problems.
Research on import and export method of virtual terminal information of smart substation
ZHENG Wenbin1, WANG Ruibiao2
2015, 37(2): 16-20.
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Abstract:A method to import and export the virtual terminal information used in commissioning and reconstruction of smart substation was introduced. The first step is to write the virtual terminal information into a fixedfield format file. Sequently, the virtual terminal information can be imported by oneclicked operation. Then the virtual terminal configuration of whole substation is accomplished. After this, the virtual terminal information file can be exported by oneclicked operation. Using the file, it is convenient to rewrite the virtual terminal connection relation in smart substation reconstruction and to backup the virtual terminal connection relation. The engineering practice shows that using the function, the workload of virtual terminal configuration of a smart substation was reduced considerably.
Study on model of influence of coal sulfer content on economic efficiency of boiler and desulphurization system
HOU Dean, JIANG Pengbo
2015, 37(2): 21-23.
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Abstract:The experimental research of coal sulfur content variation for the lean coalfired units and bituminous coalfired units was carried out while the emission of the desulphurization system was ensured to meet related standard. The influence of the variation of coal sulfur content on the hightemperature corrosion of the boiler system and the operating cost of the desulphurization system were analyzed comprehensively. The influence of coal sulfur content on the economic efficiency of the coalfired boiler and the desulphurization system was grasped. The results in this paper provide reference for enterprises to improve the environmental protection level and the economic benefit of power units.
Highhardness RO concentrated water treatment technology
WANG Chun1, WANG Ping2
2015, 37(2): 24-26.
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Abstract:Several technologies, such as the dosing reaction sedimentation, the magnetic water circulating cross flow and the microfiltration, were combined adopted to treat the reverse osmosis concentrated water. The product water indexes are as below: hardness (expressed as CaCO3) ≤300mg/L, turbidity ＜5NTU, which meet the requirements of file GB/T 19923—2005 “The Reuse of Urban Recycling Water:Water Quality Standard for Industrial Uses”. The burden of the sequent reuse treatment unit was lightened, and the water utilization rate was improved.
Application of ABB REA Arc Protection System in medium and low voltage switchgear and busbar
ZHENG Jianfei
2015, 37(2): 27-29.
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Abstract:The hazard of electric arc inside the medium and low voltage switchgear was introduced. The features of ABB REA arc protection system were expounded. Taking an 110kV substation as example, the application results of various protection schemes were analyzed and compared, and the conclusion is that the arc protection is the optimal protection scheme.
Reformation of incoming air filtration system of 9Etype gas turbine
WANG Shuguo1, SUN Jian2, HOU Li3, ZENG Rongpeng3
2015, 37(2): 30-33.
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Abstract:The problems, which occurred in operation of incoming air filtration system of 9Etype gas turbine of Inner Mongolia Sulige Gas Power Generation Company Limited, were introduced. The reformation scheme was proposed. Based on comparison of operation parameters and reformation effect, the influence of incoming air pressure loss of the gas turbine on the unit performance was analyzed. After the reformation, the service lives of the filter element and the compressor blade were lengthened. The maintenance cost was reduced, and the unit performance was improved obviously.
Application of light intelligent towerclimbing equipment in UHV transmission tower of AnhuitoShanghai power transmission line
WANG Zhijun, LI Xuebin, YANG Junning, FU Ran, ZHOU Limin
2015, 37(2): 34-35.
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Abstract:The light intelligent towerclimbing equipment, as manriding climbing equipment, is mainly used for climbing UHV/EHV transmission towers. The equipment consists of towerclimbing device and guide rail. Depending on the UHV transmission tower of AnhuitoShanghai 1000kV power transmission line, a holistic solution of operation, maintaining and repairing of the light intelligent towerclimbing equipment used in UHV tower was presented. The equipments were installed and used in four towers, and the using effects were favorable. The labor intensity of the workers was reduced, and the work efficiency was improved.
Analysis on reasons of meshing ahead of time of turning gear and treatment measures
ZHANG Jun
2015, 37(2): 36-38.
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Abstract:The turning gear of a unit meshed automatically without instruction signal. Aiming at above fault, the structure and the working principle of the turning gear were analyzed. The mechanical features and the control method of the turning gear were analyzed, and the fault reasons were found. The treatment measures were proposed.
Analysis on anticoking features of east Junggar coalfired boiler
LI Peng, ZENG Qi, ZHANG Dade, YU Liyang, WANG Zhenping
2015, 37(2): 39-41.
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Abstract:The coking characteristics of east Junggar coal were introduced. The main design parameters of east Junggar coalfired boiler were expounded. The technical features of east Junggar coalfired boiler were analyzed. The ideas about the furnace size optimization, the soot blower arrangement,the type selection of the burner and the slag conveyer and the supervision points of the furnace outlet temperature were clarified. The technical reformation measures were proposed.
Analysis and processing on fault reason of pneumatic brake system of hydropower unit No.1 in Huanglongtan Hydropower Plant
PENG Jun
2015, 37(2): 42-43.
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Abstract:In Hydropower unit No.1 of Huanglongtan Hydropower Plant of State Grid Hubei Electric Power Company, the pneumatic brake can not stop the water turbine successfully in automatic mode.The defect was analyzed,and relevant measures were adopted. The defect was eliminated. The result in this paper can be used as reference for similar hydropower plants.
Experimental research on combustion adjustment of 600MW unit
FU Yongqiang1, LI Kui1, CHEN Naixiao1, HE Jinbo1, CHENG Qiang2, YAO Bin2
2015, 37(2): 44-47.
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Abstract:Through the adjustment experiment of the coal mill system, the relationship of the coal fineness and the energy consumption of the mills with the opening degree of the splitter, the loading force, the output and the air volume was investigated. The operation parameters of the mills were optimized. The equilibrium of the coal-air ratio of the mills and the pulverized coal fineness were improved. The experiments of changing primary air flow, changing oxygen, changing secondary air and tertiary air and changing the burner air distribution mode were carried out, and according to the experiment results, the influence of the boiler operation parameters on the boiler efficiency were studied. Based on above experiments results, the operation parameters of the unit were optimized and adjusted. The problems of the unit in its operation, which include high combustible matter content in fly ash and the high exhaust gas temperature, were solved. The safe and stable operation of the unit was ensured.
Analysis on startup fault of butterfly valve oil pump of hydropower station and treatment
LI Jianshan1, LI Lihua2，LI Huabing3
2015, 37(2): 48-49.
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Abstract:When the butterfly valve was opened fully, the oil pressure had reduced to oilsupplement position, but the oil pump did not start up normally. Aiming at above fault,the fault was analyzed.Close the butterfly valve and reopening at the shutdown state, make the order of butterfly valve open and pressure maintaining action and self maintenance, the fault is removed.
Problems existing in application of automatic bus transfer equipment in 110kV input line and improvement measures
MA Yuling, LIAO Hongtao
2015, 37(2): 50-51.
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Abstract:The automatic bus transfer equipment for 110kV input line is almost used in terminal load substations. The bus differential protection is not configured in these substations. The bus faults are permanent faults commonly. Under this condition, the automatic bus transfer equipment did not be locked out and acted to switch the standby power on the failed bus, which caused impact on the transformer repeatedly. Taking the automatic bus transfer equipment for single bus segmentation input line as example, it was proposed to investigate the input side line current and to judge the bus fault according to the variation of the input line current, and the judge result can be used as decision condition to lock out the automatic bus transfer equipment.
Analysis on application of highspeed variable frequency soot blowing technology in power pant
XU Qing
2015, 37(2): 52-53.
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Abstract:The highspeed variable frequency soot blowing technology is widely used in domestic coalfired power plants, and favorable effects in eliminating the flue blockage by fly ash and improving heat transfer efficiency of heating surface were obtained. The working principle of the highspeed variable frequency soot blower was introduced. The install positions were analyzed, and some concrete suggestions were given. In order to improve the device effect, the development direction of the device in future was imagined.
Analysis on measurement error of online chemical instruments of water steam system and improvement methods
ZHENG Rigui
2015, 37(2): 54-56.
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Abstract:The situation of measurement error of the online chemical instruments of unit No.1 water steam system in a power plant was introduced. The reasons of the measurement error were analyzed. The improvement methods to reduce measurement error were proposed. After the methods were adopted, the measurement accuracy of the online chemical instruments of the power plant was improved, and the reliability of the water steam chemical supervision was ensured.
Analysis on reasons of stall of primary air fan and preventive measures
YIN Bingyi, NIU Shusen, SHEN Henan
2015, 37(2): 57-58.
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Abstract:In a power generation company, the boiler MFT accident occurred caused by stall fault of the primary air fan. The reasons of the stall fault of the primary air fan were analyzed. The preventive measures were proposed. The RB protection logic of the primary air fan was perfected. The runback protection logic of low primary air pressure was added, and the MFT accident due to stall fault of primary air fan can be avoided. So the safe operation of the unit was ensured.
Analysis on reasons of lower lubricating oil pressure of 1000MW steam turbine and treatment
WANG Haibo
2015, 37(2): 59-60.
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Abstract:In startup process of the 1000MW unit of a power plant, when the rotate speed of the turbine increased to 3000r/min, the lubricating oil pressure became lower, and the currents of the AC lubricating oil pump and the startup oil pump became larger. The unit was shut down for inspection. It was found by inspection inside the lubricating oil box that the plug of the inlet pipe of the oil turbine booster pump from the main oil pump outlet fell out, which caused the output of the oil turbine booster pump of the lubricating oil system to be insufficient. The plug was reinstalled and fixed, and the fault was eliminated.
Prevention of leakage of boiler heating surface tube and measures of fine maintenance management for boiler heating surface
CHEN Zhibo1,JING Hua1, WANG Jiaan2, LI Liang1, SHI Yan2, ZHANG Jinwen2
2015, 37(2): 61-62.
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Abstract:The leakage of boiler heating surface tubes in thermal power plant is important factor to cause unplanned shutdown of the power unit, which may bring large losses for power enterprises in economic benefit and social effect. To reduce the leakage fault frequency of the boiler heating surface tubes effectively and to improve health level of the boiler heating surface is becoming one of most concerned problems for every power enterprise. In order to prevent leakage of the boiler heating surface tubes and to enhance the fine maintenance management of the boiler heating surface, the fine managements in “inspection”, “repair” and “persons” were analyzed and summarized, and detailed prevention and control measures were proposed.
Application of denitration system reformation technology in 300MW unit
TANG Chao, ZHAO Hongcheng
2015, 37(2): 63-64.
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Abstract:The equipments of the 300MW unit of Jiangsu Huaiyin Power Generation Company Limited. were introduced. Aiming at the practical situation of the equipments and the field of the company, the features of the denitration technology were analyzed. Based on this, the denitration project reformation was implemented. The layout of the inlet and outlet flues of the reactor, the distribution of flow field of the denitration devices and the steel structure were optimized; and better result was obtained.
Analysis and optimization of denitration control system of thermal power plant
NI Xinyu
2015, 37(2): 65-67.
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Abstract:The principle and the technological process of selective catalytic reduction (SCR) method denitration were introduced. The processing principle of measured data of denitration system was expounded. Aiming at the shortcoming of original control logic, the control logic was optimized. The optimized control strategy can both control NOx removal and control the ammonia escape, and the control quality was improved obviously.
Application example of HW clarifying technology in reclaimed water reuse field of power plant
LUO Debo1, YAN Caixia1, CUI Weiqiang2, HUI Zhaohua1
2015, 37(2): 68-72.
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Abstract:The general situation of reclaimed water reuse in Huaneng Beijing Cogeneration Corporation Limited was introduced. Considering the limit of site area, the lower input water turbidity and the smaller reserved capacity of the support equipments, the HW clarifying tank was selected to replace the circular clarifying tank. The technological process of the project and the main design parameters of each processing unit were expounded. After the HW clarifying technology was adopted, when the input water flow reaches to the design flow, the turbidity of the output water of the HW clarifying tank is between 0.4NTU and 0.9NTU, which meets the requirement of the design standard.
Application of movable pole plate in reformation of electrostatic precipitator of thermal power plant
ZHANG Ronglu
2015, 37(2): 73-75.
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Abstract:In order to improve efficiency of the electrostatic precipitator and to ensure flue gas dust emission to meet the standard requirement, the electrostatic precipitator was reformed. The working principle and the features of the electrostatic precipitator with movable pole plate were expounded. The reformation content of the electrostatic precipitator with movable pole plate of unit No.10 in a power plant was introduced. After the reformation, the dust emission mass concentration in outlet of the desulphurization tower is 24.66mg/m3, amended to 6% oxygen, the emission mass concentration is 23.86mg/m3, which is lower than 30mg/m3, the standard upper limit. The expectant target of the reformation was realized.
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