va tech hydro in india - ANDRITZ Vertical volute pumps

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16 CANADA HIGHLIGHTS TOULNUSTOUC Realized within the framework of the order to VA TECH HYDRO in Vevey for the turbine governors for the two Francis turbines, "the Hydro Quebec homologation” of the new governor head Neptun-TC 1703 will allow VA TECH HYDRO to be qualified as a preferential supplier of HYDRO QUEBEC for governing systems for hydraulic turbines. This homologation process, very similar to the one followed by EDF, consists of two aspects, which aim at checking the robustness of the product on the one hand (norm SN1008), and its performanc on the other hand (norm SN38.1). At the end of September, the functional tests were successfully performed with the participation of the Hydro Quebec specialists on the Vevey test platform. Validation on site will be done during the commissioning in 2004. The robustness tests of the electronic components will be executed soon at the VA TECH SAT test laboratory in Vienna. Technical data: Output: 247 MW Head: 164 m Speed: 200 rpm Jean-Jacques Hemmeler Phone +41/21 925 7810 jj.hemmeler@vatech-hydro.ch USA BRADLEY LAKE The ACP Department of VA TECH HYDRO USA is currently working on the recently awarded contract for Electronic Governor Retrofit for the two governors of the Bradley Lake project. The contract was awarded in October 2003 by Homer Electric Association. The project includes assessment of the existing power oscillations, engineering, supply of new deflector and needle control valves and electronic control modules, installation, supervision, and performance tests for both units in the plant. Additional work was authorized in January 2004, including model testing and engineering to solve deflector problems. The plant location is very remote, and is accessible only by air or water. Inclement weather can have a significant impact on the time required to get to the plant and perform the required work. VA TECH HYDRO was awarded the contract based on our advanced technologies and the overall value of the solution to the owner. The engineering for the project is currently under way, and the equipment will be delivered and installed in May 2005. This is an important reference for VA TECH HYDRO, and should lead to several similar projects for clients with governor stability problems, especially in the western region of the US. Technical data: Output: 63.1 MW Net head: 335.3 m Speed: 300 rpm Runner diameter: 2,350 mm Oswin Moeller Phone +1/704 943 4343 omoeller@vatechhydro.com USA FLAMING GORGE The US Bureau of Reclamation has awarded VA TECH HYDRO USA a contract for the supply of three new Francis runners for Flaming Gorge hydropower plant, located in Utah in the US. The scope of supply includes a model test, new runners, new wicket gates, and the refurbishment of all other mechanical parts VA TECH HYDRO USA will have a crew and supervisors on site for the duration of the contract. One of the primary reasons for VA TECH to win the contract was the high efficiency of the units, and the resulting high return on investment for the Bureau. Runner delivery will start in 2005 with the remaining units to be supplied over a period of two years. The Bureau of Reclamation is one of the key customers in the US market. VA TECH HYDRO is currently performing rehabilitation work for the Bureau at Grand Coulee, and our customer-pleasing performance also had a positive influence on the Flaming Gorge award. Technical data: Output: 48 MW Head: 130 m Speed: 400 rpm Runner diameter: 2,300 mm Mike Byrne Phone +1/704 943 4343 mbyrne@vatechhydro.com COSTA RICA LA GARITA Performance tests successfully completed. The two Francis units of La Garita HPP, owned by INSTITUTO COSTARRICENSE DE ELECTRICIDAD (ICE), were extensively refurbished within the framework of a joint refurbishment project between VA TECH HYDRO in Vevey and Vienna for the generators and Mexico for the control and governing systems. With respect to the turbines, runners, distributors and shafts have been replaced, together with an overhaul of the hydraulic surfaces of all other components. New governors, cooling systems and equipment for operation in synchronous condensers have also been installed. Following the release of unit 1 for commercial operation on February 10, 2003 and unit 2 on December 19, 2002, performance tests of the turbines and generators were completed. The thermodynamic method used to measure the turbine performance was applied under very special conditions. Indeed, a full performance test system for thermodynamic measure-
ments was delivered to the client so that he could himself measure the turbine performance in parallel to the results achieved with our own measuring system. The pressure and temperature measurements were thus doubled and postprocessed by two independent acquisition systems. The measurements were completed in accordance with the IEC recommendations, publication 41. It was thus possible to verify that the contractual weighted efficiency of more than 94% was indeed reached. Owing to favourable measuring conditions, the efficiency differences between the two systems for all ten measurements never exceeded 0.12% and the measured weighted efficiencies thus defined showed a difference of only 0.03%. The contractual guarantees were thus verified twice and the positive results confirmed, despite a repartition of mechanical losses that was penalising the turbine. Technical data: Output: 20.33 MW / 23.4 MVA Voltage: 13.8 kV Head: 157 m Speed: 514.3 rpm Runner diameter: 1,300 mm Stator diameter: 4,500 mm Florence Gaubil Phone +41/21 925 77 71 florence.gaubil@vatech-hydro.ch PERU MANTARO Due to bucket failures on cast runners recently delivered by another manufacturer, ELECTROPERU, the main Peruvian energy producer, decided to order 4 MicroGuss TM Pelton runners from VA TECH HYDRO after an international bidding process based on forged runners. Mantaro HEPP, with its 7 units generating 25% of Peru’s electricity, is the most important power plant of the country. Due to the strategic importance of Mantaro, the customer decided to bid for forged runners. VA TECH HYDRO’s experience and reliability were key factors during the evaluation process. This is another success for the MicroGuss TM technology. In addition to the runners, VA TECH HYDRO will supply the coupling bolts, transport, the runner installation and four site efficiency tests. First delivery is planned for the end of 2004. Technical data: Output: 107 MW Head: 745 m Speed: 450 rpm Runner diameter: 2,600 mm Paul Richard Phone +41/21 925 77 66 paul.richard@vatech-hydro.ch INDIA KHAULI Himachal Pradesh Electricity Board (HPSEB) ordered from VA TECH HYDRO Faridabad (India) a fully homologous model of the horizontal 2-jet Pelton Compact turbine under construction in north India. The model tests confirmed the top efficiency level of the turbine, integrating VA TECH HYDRO’s best knowhow in Pelton design. Taking advantage of the latest developments in Pelton design and refinement of each hydraulic component, all technical guarantees have been fulfilled. During the model tests at VA TECH HYDRO’s hydraulic lab- HIGHLIGHTS oratory in Vevey, our customer could witness the perfect hydraulic behaviour of the turbines over the whole operating range and verify that the contractual guaranteed runaway speed was met. These good results will help HPSEB to further manage the project in collaboration with VA TECH HYDRO in Faridabad (India) with a higher level of serenity. The KHAULI project will also represent a new local reference for VA TECH HYDRO in the fast growing Indian market. Commissioning of both turnkey units is scheduled for 2005. Technical data: Output: 6.44 MW Head: 477 m Speed: 750 rpm Runner diameter: 1,190 mm Claude Bissel Phone +41/21 925 7779 claude.bissel@vatech-hydro.ch SOUTH AFRICA VANDERKLOOF Vanderkloof hydropower station is located in the heart of the Free State, South Africa. Being one of two large run-off river hydropower stations on the Orange River, Vanderkloof HEPP comprises two 120 MW Francis turbine generators operated by ESKOM to provide peak load power and ensure network stability. VA TECH HYDRO was awarded a contract to design, manufacture and supply two complete sets of stator windings and auxiliary materials. Also, VA TECH HYDRO technical advisors will oversee the roundthe-clock erection work. The goals of the project include using state-ofthe-art technology to solve inherent partial discharge problems and the renewal stator windings that are now reaching the end of their design lifetime. This project is unique due to the new constellation of partners and customers, with VA TECH HYDRO working together with ROTEK 17
Page 1 and 2: July 2004 ISSUE 06 sustainable solu
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