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Architecture and key strategy of online state assessment system for substation auxiliary power supply system WANG Liding, ZHAN Qingcai, YIN Jianjun, YANG Changfu, WANG Junhui, NIE Xiaobo Huadian Technology    2021, 43 (5): 15-22.   DOI: 10.3969/j.issn.1674-1951.2021.05.003 Abstract （6323）   HTML （121）    PDF （2435KB）（438）       Knowledge map    Save Auxiliary power supply system of a substation is important to the station's safe and reliable operation.The system is mainly composed of AC power supply system,DC power supply system and AC uninterruptible power supply system.To effectively evaluate the operation states of AC and DC power supply systems,an online state assessment system for substation auxiliary power supply system is proposed which works with the collaboration of the main system and the subsystem.After introducing the main functions and components of the main and sub-systems,the assessing process and the criteria for assessing the AC power supply equipment,inverter power equipment,DC/DC communication power supply equipment and DC power supply equipment are expounded.According to its application situation in a substation,the assessment system is proven to be effective in keep the safe and reliable operation of auxiliary power supply system in substation.It is of engineering application value. Table and Figures | Reference | Related Articles | Metrics

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Prevention and Control of Boiler ‘Four Pipe’ Leakage ZHOU Xue-song Huadian Technology    2008, 30 (9): 9-12.   Abstract （4673）            Knowledge map    Save unplanned outage is one of important benchmarking content, and boiler ‘four pipe’ leakage is the main reason caused unplanned outage in thermal power plant at long time, which influences safety and stable operation of generation equipments seriously. In the 670t/h boiler of Tianjin Junliangcheng Power Generation Corporation Limited, the heating surface was arranged unreasonably, heating surface leakage was occurred frequently. Aiming at this problem, a special anti-explosion team was established, the boiler heating surface was supervised and checked during the boiler production, erection and operation. By continuous groping and improvement, a set of effective anti-abrasion, anti-explosion experiences were summarized. The application of these experiences reduces the leakage greatly, and unplanned outage was no occurred in 2006 and 2007. Related Articles | Metrics

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Calculation and analysis of auxiliary power consumption rate of thermal power plant YANG Yiwei Huadian Technology    2011, 33 (10): 56-57.   Abstract （4532）            Knowledge map    Save The calculation method of auxiliary power consumption rate of thermal power plant was introduced. The main factors influencing on the auxiliary power consumption rate were analyzed. Some measures for decreasing the auxiliary power consumption rate were put forward, which can be used as reference for thermal power plants to decrease own auxiliary power consumption rate. Related Articles | Metrics Cited: Baidu(3)

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The Calculation Method on CL/CD of the Wind-mill Generator Aerofoil MA Peng;FENG Jia-hui;HU Chang-yang Huadian Technology    2008, 30 (7): 75-79.   Abstract （4420）            Knowledge map    Save This article simulated and analyzed the behavior of wind-mill generator aerofoil in the wind field by using of the physics environment method in the fluid- solid coupling module of the large finite element analysis software-ANSYS, and a calculation method on cL/cD of the airfoil was found through many attempts and selection, the method can give a result which relatively approaches the real value. Related Articles | Metrics

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Discussion about the Status of Running at Daytime and Stopping at Night Gas Turbine Generator YU Li-fan;CHENG Liang Huadian Technology    2008, 30 (9): 56-58.   Abstract （4178）            Knowledge map    Save The two familiar main bus connection of gas turbine generator was introduced, the prescription about generator normal status was explained, a burned-out accident of knife switch at the generator outlet and an accidental closing of generator main breaker were described. The actuation of normal generator protection device under the case of main generator beaker accidental closing was analyzed, the status of gas turbine generator, which is running at daytime and stopping at night, was discussed also. Related Articles | Metrics

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The Important Way for Energy Saving of Fan and Pump WANG Zhen-yu Huadian Technology    2008, 30 (7): 1-5.   Abstract （4117）            Knowledge map    Save The correct selection and use of fan and pump are the important prerequisite for raising their efficiency. Taking fan as the example the similar operation relations of fan and pump are explained, the essential conditions which must be satisfied for similarity of fan and pump were proposed, and the inevitable results of the similarity were given. The variable frequency speed regulation has become the first scheme to be selected. According to the similarity law of fan and pump, in the process of reducing speed, the efficiency of the fan and pump will be kept at the same value, and its flow rate, pressure(or delivery head) and power are reduced in proportion to speed, speed square and speed cube respectively. Related Articles | Metrics

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The Research and Measures of Energy-saving and Consumption-reducing in 1000 MW Unit REN Shang-kun;ZHAO Xun-hai;WU Yan-bin;LIN Fu-hai;DONG Wen-cheng Huadian Technology    2008, 30 (9): 6-8.   Abstract （4038）            Knowledge map    Save In the Huadian International Zouxian Power Plant, a benchmarking management long-effective work mechanism of‘Comparing with advanced， checking error and correcting malpractice, continually improving, uninterrupted exceeding’ was established, and adequate attention was paid to the energy-saving and consumption-reducing work. According to the actual operation of two 1000 MW units, the concrete methods and measures for energy saving and consumption reduction were analyzed and introduced. Under the rated condition, the standard net coal consumptions of units No.7 and No.8 are 282.28 g/（kW•h）and 281.91g/（kW•h），heat consumption rates are 7330.94kJ/（kW•h） and 7345.4kJ/（kW•h） respectively. Since the units were brought into production, their house service consumption rates achieve 5.22% and 5.29% respectively, and the design requirement was satisfied. Related Articles | Metrics

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The First Home-made 670t/h CFB Boiler and Its Operation Experience PENG Xiao-zheng;CHEN Nian-zu;CHENG Wen-feng Huadian Technology    2008, 30 (7): 6-8.   Abstract （4011）            Knowledge map    Save The problems revealed during erection, trial operation and trial production of the first home-made CFB boiler were introduced. The adoption of successful experience, the improvement of fluidized bed heat exchanger (FBHE), the measures for prevention of explosive combustion and furnace clinkering were expounded in detail, and the useful practical experience for construction of 1025t/h CFB boiler and other CFB boilers was afforded. Related Articles | Metrics

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The Reason Analysis on Hydrogen Purity Lowering of Double-ring Oil Sealing Generator HU Xiao-hui Huadian Technology    2008, 30 (7): 14-16.   Abstract （3967）            Knowledge map    Save The quantity of make-up hydrogen is an important operation index of generator unit, too large quantity of hydrogen often appears in the double-ring oil sealing generator .By the analysis of the oil sealing system and the sealing bush construction, the problems and hidden troubles existing in system design and operation were treated and regulated, the speed of hydrogen purity lowering was controlled, the hydrogen exchange quantity of generator and the hydrogen consumption were reduced, so the purpose of energy-saving and consumption-reducing was achieved at last. Related Articles | Metrics

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The Current Problems and Countermeasures of Energy Saving and Emissions Reducing in Power Industry WANG Zhi-xuan Huadian Technology    2008, 30 (5): 1-6.   Abstract （3800）            Knowledge map    Save In this paper the current status of energy saving and emissions reducing in power industry were introduced, and existing problems were pointed out. The following proposals were put foreword by author: to step up our efforts to promote the adjustment of electric power industrial structure, further strengthen technique transform for the old units, deep the reform of legal system and market, perfect the mechanism of energy saving and emissions reducing, intensify the research on science of energy saving and emissions reducing, give full play to the role of self- discipline. Related Articles | Metrics

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The Reason Analysis of Boiler Clinkering and Countermeasures CHEN Tao;QIU Guang-fu;TAN Guang-wei Huadian Technology    2008, 30 (7): 42-45.   Abstract （3773）            Knowledge map    Save Aiming at the serious clinkering problem of #11 boiler in Dafang Generation Co., Ltd., the concrete reasons of boiler clinkering were analyzed systematically combining with the features of the boiler equipments, system and operation. Based on a large number of experiments, analyzing and summarizing, a series of feasible measures for solving the problem of boiler clinkering were proposed, and after adopting those measures in practice the problem of boiler clinkering has been controlled basically. Related Articles | Metrics

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The Coal Consumption Data Analysis of Turbine System in Benchmarking Management HUANG Xiang Huadian Technology    2008, 30 (9): 1-5.   Abstract （3742）            Knowledge map    Save Based on the heat balance diagram of 600MW unit, the key data points in rated condition were analyzed, and relevant thermal efficiency data can be obtained by calculating according to the key data points. The coal consumption rate and unit thermal efficiency will vary with the variation of the field operation parameters. Therefore, it is can find that in which respects the unit need adjustment or reformation by analysis of key points data variation, and the key link for decrease the coal consumption rate of power plant can be grabbed. The emphasis of this paper is analysis of coal consumption data of steam turbine thermal power system, the coal consumption rate in this paper was obtained by heat balance calculation according to the relevant data of heat balance diagram. Related Articles | Metrics

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The Welding and Heat Treatment of Novel Heat-resisting Steel FAN Chang-xin;ZHOU Rong-can;YAO Bing-yin;SHAO Tian-you; TANG Li-ying;WANG Hong-zhe;ZHANG SHU-xia Huadian Technology    2008, 30 (7): 24-27.   Abstract （3740）            Knowledge map    Save Take welding and heat treatment of the P92 steel of main steam pipe in Huaneng Yuhuan Power Plant as the example, the solutions of technical problems in novel material welding were introduced. Aiming at the problems existing in welding and heat treatment field in China, some effective measures were employed to control the installation quality. It is expected that the measures mentioned in this paper can be used as reference for welding quality control in construction of other ultra-supercritical units. Related Articles | Metrics

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Discussion on Direct ACC System of 1000MW Ultra-supercritical Unit ZHANG Xin-hai Huadian Technology    2008, 30 (5): 7-11.   Abstract （3717）            Knowledge map    Save Four schemes of steam discharge into air cooling system were planned according to the different nameplate output definition for 1000MW unit. The process flow of direct air cooling system was described. The heat-transfer area of air cooling condenser (ACC), the number of fans and duct rows, the diameter of discharge ducts and the height of the ACC platform for each scheme were determined by detailed calculation and analysis. The result can be used as reference for the construction of air cooling system in 1000MW unit. Related Articles | Metrics

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The Energy-saving Reformation of Electro-static Precipitator Power Supply ZHU Qi Huadian Technology    2008, 30 (7): 68-70.   Abstract （3657）            Knowledge map    Save Aiming at the shortcoming existing in the electro-static precipitator power supply and its control device of Wangting Power Plant unit #11, which includes the larger energy consumption, the backward control mode, the frequently occurring of communication accident, etc., the reformation measures were proposed. The economic analysis by the comparison of energy consumption before and after reformation shows that the energy-saving goal is realized perfectly. Related Articles | Metrics

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Reformation and Economical Efficiency Analysis on Fuel Oil Pump of 600 MW Units ZHAO Zuo-qi;BAO Jin-chun;ZHENG Xu-sheng Huadian Technology    2008, 30 (5): 36-38.   Abstract （3558）            Knowledge map    Save existing problems and main influence factors of fuel oil pump in Huadian Baotou Power Plant were analyzed. The specific measures of technical reformation for energy saving were described, the operation pattern and the economical benefits obtained from the reformation were introduced. The reformation has obvious effects in preservation energy, decrease discharge and increase efficiency. It presented scientific evidence and valuable experiences for the oil-saving reformation of the same type equipments. Related Articles | Metrics

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Improvement for Reverse Power Trip of Power Plant Huadian Technology    2008, 30 (5): 39-40.   Abstract （3512）            Knowledge map    Save Related Articles | Metrics

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Water Resources Utilization Situation and Countermeasures of Thermal Power Unit JIANG Zi-Sheng;HAN Mai-liang Huadian Technology    2008, 30 (6): 1-5.   Abstract （3340）            Knowledge map    Save The water resource utilization and water business management situation of thermal power plants in China Huadian Co. Ltd. were described. The water resource developing and utilization, the water saving technique and the improving measures were discussed with comparison of water consumption index of thermal power plants in domestic and abroad. The influences of restriction of construction of thermal power plants by the environment protection policy and the scarcity of water resource were expounded, and some suggestions given in this paper are as following: taking the urban sewage re-using and seawater desalination as the future important water resource, drawing up the strategy of water resource reserve scientifically according to the general distribution of power plant sites and its development of whole group. Related Articles | Metrics

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Research of high concentration ratio circulating water treatment technology in thermal power plant SU Chang-jian;ZOU Wei-he Huadian Technology    2008, 30 (9): 70-73.   Abstract （3308）            Knowledge map    Save Along with the gradual shortage of water resource, more close attention will be paid to the high concentration ratio circulating water treatment technology. The processes of scale inhibitor selection experiment, scale inhibitor density selection experiment and dynamic simulation experiment in the circulating water treatment system of Huadian Power International Shiliquan Power Plant were described in detail, and the concrete outlet temperature of circulating water and allowed control index were obtained. The considerable water-Saving effect can be obtained by increasing the concentration ratio to 4～5 times. Related Articles | Metrics Cited: Baidu(3)

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Reducing of boiler oil consumption by using tiny-oil ignition technology THAO Han;SUN Zhi-lin Huadian Technology    2008, 30 (9): 13-15.   Abstract （3297）            Knowledge map    Save The application of tiny-oil ignition combustion technology in the pressurized, direct firing, lean coal fired, 1036 t/h boiler was presented. By the actual example analysis of the Unit No.6 of Yangzhou Generation Corporation Limited, it was proved that the application of the tiny-oil ignition technology in similar boiler is feasible, and the oil consumption can be reduced considerably. Related Articles | Metrics