Projects of power sources approved

The National Development and Reform Commission has recently published 168 construction projects of power sources with a total generating capacity of 121,000 MW which were approved since 2004. The Bulletin No. 57, 2005 issued by the commission points out that in recent years, the national economy developed rapidly and the supply of electricity was relatively     

Macroscopic analysis of optimum water power installed capacity in power system

There are two kinds of generating equipment in a firmly con-nected power network,one is water power plants(shortenedas“water power”,below),the other is thermal power plants(includingcoal-fired,oil-fired and nuclear power plants,but the analysis in thisarticle is based mainly on coal-fired power generation.And they willbe shortened as“thermal power”below).As far as power output isconcerned,when the share of water power installed capacity in     

Development of power industry in Chongqing

The policy of reform and opening to the outside world has brought about a historical opportunity for the power industry of Chongqing to develop rapidly. In 1992, two 360-MW units of Huaneng Luohuang Power Plant went into operation. In 1995, the total installed capacity of Chongqing Power Plant came up to 800 MW after extended. In 1996, Chongqing became a municipality directly under the Central Government, which created another great opportunity for further development of the power industry in Chongqing. Till the year, the installed capacity of the whole city reached 2993.1 MW and the annual generation totaled 13.316 TWh. The electricity sold of the national grid was 11.382 TWh. There were 299 substations (35-220 kV) with an aggregate capacity of 6564.6 MVA and 35-500 kV transmission lines of 9157.76 km in length. By the end of 2005, the installed capacity and the annual generation were 5645.4 MW and 25.112 TWh respectively. The electricity sold of the national grid amounted to 28.934 TWh. There were 458 substations (35-500 kV) with an aggregate capacity of 24,693.7 MVA and 35-500 kV transmission lines of 14,932.14 km in length.     

Guangdong''''s desulphurization plan of power plants

Guangdong will completely carry out an environmental protectionplanning to strictly control SO2 emission,shut down and closesmall thermal power units with serious pollution and enhanceatmospheric quality control.     

Stability improvement of power system by simultaneous AC–DC power transmission

This paper presents a concept of improving the transient stability of power system by simultaneous AC–DC power transmission through a transmission line. A double circuit long transmission line is converted to simultaneous AC–DC line for feasibility study. Loss of synchronism is prevented by quickly producing sufficient decelerating energy to counteract accelerating energy gained during fault and subsequently due to loss of line after clearing the fault. Fast controllability and modulation of DC component is utilized to achieve this feature. The system under consideration is found to remain stable under transient condition up to transmission angle of 80°. Simulation study on PSCAD/EMTDC is carried out to validate the concept.     

Operational indices of power industry in 2009 released

<正>On January 6, the National Energy Administration released the operational indices of Chinese power industry in 2009, including total consumption, capital construction investment and the capacity of retired     

Transmission capacity of trans-regional power grids is raised

The State Electricity Regulatory Commission (SERC) issued the Regulatory Report on 500-kV National Power Grid Operation and Trans-Regional Trade on November 22. It showed that the 500-kV/330-kV national power grids have covered the vast part of the country except Xinjiang, Tibet and Hainan (Taiwan is not included). At the same time, the trans-regional electricity trade has been expanded.     

Soaring trend of nationwide power consumption will continue

The State Grid Corporation‘s Working Conference on Power Market Analysis and Forecast in Autumn 2004 was held in Henan Luoyang on October 29.     

Energy and water saving of thermal power plant

The average coal consumption of thermal power plants inShandong Provincial Grid was reduced from 449 g(standardcoal)/kWh in 1979 to 389 g(standard coal)/kWh in 1989,as inrecent ten years,the thermal power plants of Shandong Provinceadopted the method of constructing large scale generating units andimproving the economic performance of old generation units,mean-while the other technical and economical targets also were improvedsignificantly.For instance,the electric energy consumption rate of     

Tianjin City promotes the construction of power grid

A few days ago, Tianjin＇s leading group of power grid construction held the third meeting on which the work in 2006 was summarized in an all-round way and the work in 2007 was arranged.     

China published the construction cost of power projects

On June 19 this year, the regulatory information release on the construction cost of power projects in the 10th Five-Year Plan period, sponsored by the State Electricity Regulatory Commission of China (SERC) and co-sponsored by China Power Engineering Consulting Group Corporation and China Hydropower Engineering Consulting Group Corporation, was held in Ningbo,Zhejiang Province.According to the report on construction cost of the power projects having been put into operation during implementation of the 10th Five-Year Plan, the specific     

Construction of Russia’s pilot binary power unit at the pauzhet geothermal power station

The basic process diagram and main technical solutions adopted in constructing the pilot 2.5-MW Pauzhet binary geothermal power station are described. Results obtained from an analysis of some principles of selecting the working fluid and optimizing the working parameters and operating modes of this power unit are presented.     

Utilization of power plant fly ash in China

The quantity of slag and ash discharged from coal-firedpower plants grows in step with development of electricpower industry,the disposal of which imposes a heavy burden on theoperating plants and to a certain extent exerts an effect of restrainingthe development of coal-fired power generating units.Presently ash     

The progress of Construction technology of thermal power projects in China

In line with the rapidly expanding electric power industry inthis country, China now owns a work force totaling morethan half a million of staff and workers engaged in the constructionof thermal power projects; also the technology employed in theirwork has experienced notable progress. In the early fifties, construction work mainly relied onmanual manipulation. Besides the use of hand- or electric-drivenover-head cranes inside the machine-house, vertical transporta-tion depended mainly on hoisters and pulleys; chain blocks werescarce at that time. Horizontal transportation was mainly doneby manual pulley-blocks and rollers, sometimes also withwinches. Electric- or gas-welding by hand was the common prac-tice. In a word, the technology was backward and labor-inten-     

Both of the two large power grid corporations invest much capital in power grid construction

To change the lagging situation of power grid construction,the two large power grid corporations will invest much capital in the period of the11th Five Year.It is reported that the State Grid Corporation will inject more than800billion Yuan in power grid …     

Practical application of the benchmarking technique to increase reliability and efficiency of power installations and main heat-mechaniс equipment of thermal power plants

Data on the comparative analysis variants of the quality of power installations (benchmarking) applied in the power industry is systematized. It is shown that the most efficient variant of implementation of the benchmarking technique is the analysis of statistical distributions of the indicators in the composed homogenous group of the uniform power installations. The benchmarking technique aimed at revealing the available reserves on improvement of the reliability and heat efficiency indicators of the power installations of the thermal power plants is developed in the furtherance of this approach. The technique provides a possibility of reliable comparison of the quality of the power installations in their homogenous group limited by the number and adoption of the adequate decision on improving some or other technical characteristics of this power installation. The technique provides structuring of the list of the comparison indicators and internal factors affecting them represented according to the requirements of the sectoral standards and taking into account the price formation characteristics in the Russian power industry. The mentioned structuring ensures traceability of the reasons of deviation of the internal influencing factors from the specified values. The starting point for further detail analysis of the delay of the certain power installation indicators from the best practice expressed in the specific money equivalent is positioning of this power installation on distribution of the key indicator being a convolution of the comparison indicators. The distribution of the key indicator is simulated by the Monte-Carlo method after receiving the actual distributions of the comparison indicators: specific lost profit due to the short supply of electric energy and short delivery of power, specific cost of losses due to the nonoptimal expenditures for repairs, and specific cost of excess fuel equivalent consumption. The quality loss indicators are developed facilitating the analysis of the benchmarking results permitting to represent the quality loss of this power installation in the form of the difference between the actual value of the key indicator or comparison indicator and the best quartile of the existing distribution. The uncertainty of the obtained values of the quality loss indicators was evaluated by transforming the standard uncertainties of the input values into the expanded uncertainties of the output values with the confidence level of 95%. The efficiency of the technique is demonstrated in terms of benchmarking of the main thermal and mechanical equipment of the extraction power-generating units T-250 and power installations of the thermal power plants with the main steam pressure 130 atm.     

After the Depletion of Resources——Inspiration from transit of Fuxin from ＂city of coal power＂ to ＂city of wind power＂

Fuxin, Liaoning Province, the former ＂city of coal power＂ is depleted of resources because of over-exploitation. It did not, however, become devastated as some energy-depleted cities, but is making efforts in transition to a ＂city of wind power＂, a new type of energy base.     

Water chemistry of the system for cooling the electrical generator’ stator of the power unit at a thermal power station

Results from studies of the water chemistry used in the system for cooling the stator windings of alternators used in supercritical-pressure power units are presented, and a solution is suggested using which the standardized pH value of cooling water is maintained in the range 8.0–9.0. It is shown that addition of NaOH in the water cooling system when a drop of pH value occurs cannot fully satisfy the requirements of the operating circular due to low buffer properties of aqueous medium.