Technological Innovation

Driving Rapid Development of CYPC

In recent years, CYPC has been adhering to such guiding principles for its technological work, i.e., "independent innovation, taking great strides toward key areas, supporting development and becoming a leader for the future", and precisely aims at "enhancing cutting-edge technologies for the operation of giant generating units and optimized regulation of reservoirs.” It has established a technological input mechanism effective for the long-term and characterized by steady growth. With cumulative technological input valued at 1.1 billion RMB for the past 4 years, it has been trying and has formed core capabilities for the safe and stable operation of clusters of giant power stations, efficient maintenance and troubleshooting of multiple power stations of river basins, and scientific dispatching for cascade reservoirs of river basins, etc.

A sound innovation system and guarantee measures are the basis for the effective operation of technological innovation. Therefore, aiming at enhancing its core capabilities, CYPC has been improving its innovation work from multiple aspects, including establishing a technological input mechanism effective in the long-term and characterized by steady growth. Technological input capital has been as high as 717 million RMB for three consecutive years, thus ensuring the safe and effective operation as well as troubleshooting and maintenance of giant generating units, large-scale power stations and smooth comprehensive utilization of water resources of river basins and smooth optimized regulation of cascade reservoirs. CYPC has also established and is improving mechanisms for talent cultivation, development, evaluation, use and introduction, and related assessment and incentive policies, working out and implementing policy measures conducive to the growth of talent, and creating an environment for outstanding talent to stand out. The company strives to strengthen the construction of fundamental capabilities for scientific research, as well as planned and created a technological innovation platform at CYPC Technological Research Center. This improved existing laboratories, leading to the establishment of eight new laboratories as well. All of the corporate level laboratories, including a mechanical laboratory, a secondary device laboratory, an equipment verification laboratory, a hydro regime automation laboratory, etc., were made to improve the capabilities of the company in independent R&D in an all-round way. Strengthening the overall advantages of the company, strengthening strategic cooperation with units engaged in equipment manufacturing and those in construction, and integrating resources to realize major technological breakthroughs are all advocated at the company and creating a culture that promotes innovation, and creating a fine style throughout the company advocating respect and competition for innovation through such activities as building teams and groups for innovation and efficiency (one of the five types of teams and groups at CYPC) and celebrating "the day of scientific innovation" to ensure efficient operation of the scientific innovation system were all introduced to further establish CYPC as a leader of the industry from a global standard.

During the period of 2011-2015, CYPC carried out nearly 78 key scientific research projects, mainly involving efficient operation of power station equipment, optimization of economic operation modes of generating units, standards for safe production, hydrological and hydro regime forecasts, and optimized regulation of reservoirs.

Some example would be the localized production for spare parts. Resolving issues relating long shipping times and high cost experienced by procurement at the Three Georges Hydropower Station; the risk mitigation during the initial period at Xiluodu Power Station that resulted from changes in outbound power transmission; independent research on optimization of the control process for the hydraulic system at the Xiangjiaba Hydropower Station; weather analysis in the Jinsha River basin to improve forecast accuracy for precipitation in the area; these research have all created great results for the company.

Undertaking the drafting of 28 national or industry standards, such as Guidelines on the Management of Maintenance of Equipment at Hydropower Stations, and participating in the research on the system of technical standards for the hydropower industry. Trying to output corporate standards through participating the drafting of national and industry standards. Meanwhile, CYPC keeps a foothold in the provision of technical support for domestic or overseas projects contracted by CTG, promoting and applying standards for the operation and management of large-scale hydropower stations in the world. This has successfully implemented technical consultancy projects for Murum Hydropower Station in Malaysia and Merowe Hydropower Station in Sudan.

In addition, CYPC has summarized and promoted its successful experience in operation, management and joint dispatching of the Three Gorges-Gezhouba cascade hydro complex, gathered and sorted out over 4,000 technical standards and procedure specifications for power production, worked out a list of systems of technical standards of the company, procedures for the regulation, operation and management of Xiluodu-Xiangjiaba cascade hydropower stations in the Jinshajiang basin, meteorological service standards for hydropower projects, and regulations on the dispatching and control of cascade power stations, etc., to improve the company's level of the management of technical standards in an all-round way. Attaching great importance to the creation of an innovative culture, bringing into play the role of professional committees in the organization of innovation; establishing and improving the mechanism for the cultivation, development, evaluation, use and introduction of innovative talent in technology. With years of efforts, innovation has already become a common concept and a habit among the vast number of employees at CYPC.

Harvesting Fruits of Innovation

CYPC has been centering around safe power production and efficient operation of the enterprise in its innovation activities, and its employees have also been growing into talents during the process of innovation. Within just a few years, CYPC has selected and retained 14 Level I experts, 122 Level II experts; over 100 people have emerged as backbone technological inventors who are playing an important role in scientific research. During the period of 2011-2015, CYPC won over 40 awards for technological achievements on the national or provincial level, and obtained 329 patent licenses; it started 109 key scientific research projects, mainly involving efficient operation of power station equipment, on-line monitoring and intelligent diagnosis, standards for safe production, hydrological and hydro regime forecasts and optimized regulation of reservoirs, etc.

2011-2015 CYPC won

  1. Awards for technological achievements on the national or provincial level

    40

  2. Obtained Patent licenses

    329

  3. Startedkey scientific research projects

    109

2011

The treatise Interaction Mechanism for Alluvion Processes of Rivers and Lakes and Key Regulation and Control Technology won the second prize for State Technological Achievement Award.

Joint Development and Debugging of the Computerized Monitoring System for the Three Gorges Right Bank Power Station.

Experimental Research on the Stability of Hydroturbine Generating Units at the Three Gorges Hydropower Station and the Application of the Results of the Research was awarded second prize for the State Achievement Award for Energy Technologies; Computerized Monitoring System for the Three Gorges Right Bank Power Station won the first prize for Dayu Water Conservancy Science and Technology Award sponsored by the Ministry of Water Resources.

2012

Digital Status Analysis and Diagnosis System for Generating Units at the Gezhouba Hydropower Station and Development and Application of CZY No Uplift Extension Line System were awarded the second prize for the State Technological Achievement Award for Safe Power Production.

Application of Digital River Basin Technology in Operation and Management of the Three Gorges Reservoir was awarded the second prize for China Power Science and Technology Award.

2013

Management Information System (MIS) for Power Production at Large Trans-regional Hydropower Stations was awarded the first prize for Award of Outstanding Achievements in Information Technology for the Power Industry.

Troubleshooting of Equipment and Facilities at the Three Gorges Hydropower Station was awarded special prize for Achievements in Management Innovation of National Power Industry.Three achievements including Digital Status Analysis and Diagnosis System for Generating Units at the Gezhouba Hydropower Station were awarded the State Technological Achievement Award jointed given by the State Electricity Regulatory Commission (SERC) and the State Administration of Work Safety (SAWS).

Development and Application of Excitation System for 700 MW Giant Hydroturbine Generating Units won the second prize for scientific and technological achievements in hydropower generation.

2014

CYPC was awarded special prize of the Fourth Edition of Award of Innovation in Equipment Management of National Power Industry.

Three achievements, including Responsibility System Improves Lean Production Management, Establishment and Innovation of Modes of Materials Supply Based on River Basins for Hydropower Generating Enterprises and Innovation and Practice of Standards for the Evaluation of Safety of Production Environments of Hydropower Plants won the first prize for achievements in management innovation given by China Electricity Council (CEC).

Adapted Application of New Superexcitation Technology through Superimposition in the Excitation System of Generators, A Device for Removing and Installing Horizontal Operation Mechanisms of Circuit Breakers of Metal Gas-Insulated Switchgear (GIS) and Platform for Troubleshooting Stators of Generators at the Three Gorges Hydropower Station won the first prize for technological achievements of employees of national power industry.

2015

Structural Construction and Practice of Intelligent Gezhouba Hydropower Station, Practice of and Thinking about the Connection of Generators for Power Generation under the New Situation, and Probe into and Practice of the Mode of "Separation of Technical Management and Troubleshooting Operation" won the first prize for Achievements in Enterprise Management Innovation of National Power Industry.

Transformation of Derived Oil Mist Sealing System of Dongfang Electric Generating Units at Xiluodu Hydropower Station and Research of Methods for Measurement of Dielectric Loss and Its Time Characteristics for Grading Capacitor between Open Contacts of Adjacent GIS Circuit-breakers without Outage won the first prize for the 7th edition of technological achievements of employees of national power industry.

In 2015, for the 7th Edition of Technological Achievements of Employees of National Power Industry and the Second Contest of Technological Innovations by Young Employees of CTG, 41 achievements by employees of CYPC won recognition, and a number of self-developed industry leading scientific and technological achievements by employees attracted attention of the industry.

Focusing on Actual Effects, Carrying Forward Innovation on Oil Mist Absorption Facilities for Thrust Bearings and Guide Bearings

Award-winning Achievement: Transformation of Derived Oil Mist Sealing System of Dongfang Electric Generating Units at Xiluodu Hydropower Station

Award: Second Prize for the 2015 (7th Edition of) Technological Achievements of Employees of National Power Industry.

Main Innovators: Lu Ming, Deng Guoqing, Liu Dexin, Zhang Chengjun, Lu Mingming, You Zhibo

Oil mist absorption facilities are equipment that can collect oil mist generated from the operation of oil-lubricated bearings to avoid pollution. They are mainly made up of oil deflectors, oil collectors and related control systems. In order to avoid the stators and rotors of generating units from being polluted and insulation life from being influenced, the thrust bearings and guide bearings at the Xiluodu Hydropower Station are all equipped with oil mist absorption facilities. But during the troubleshooting and operation of the generating sets, the existing oil mist absorption facilities not only failed to produce expected effects but also needed to be oiled regularly, which increased maintenance costs.

Technological Innovation Enhances Reliability of the Switches of the GIS at the Three Gorges Hydropower Station

Award-winning Achievement: Optimization of Transmission Mechanisms for the Isolating Switches and Grounding Switches of the 500kv GIS of the Three Gorges Underground Power Station

Award: First Prize for the Second Contest of Technological Innovations by Young Employees of CTG

Main Innovators: Luo Rencai, Liu Daijun, Zhang Ge, Zhang Guansong, Yang Feng, Han Zunzhan

Isolating switches and grounding switches of metal-clad gas insulating switchgears (GIS) are indispensable for GIS equipment and play an important role in parallel operation of generator sets and transmission line switching. At present, the mechanical structure of such equipment used in the industry has certain limitations, and it is easy for isolating switches and grounding switches to have non-full-phase motions due to tripping of transmission rods, presenting a hidden danger of burning switches, which will severely influence safety and the smooth operation of generating sets.

Constant Improvement will Definitely Lead to Innovative Achievements

Award-winning Achievement: Design and Application of Additional Guide Lanes on Collector Rings at the Service Shop

Award: First Prize for the Second Contest of Technological Innovations by Young Employees of CTG

Main Innovators: Geng Qiankun, Wang Jintao, Han Bo, Zhang Chunhui

Originality in technology is innovation; so is constant improvement; or in other words, perseverance in constant improvement will definitely lead to innovative achievements. The proposal of adding guide vanes to collector rings and their successful application have fully indicated that constant improvement will definitely lead to innovative achievements. Collector rings are important components in the slip ring devices of excitation systems of generators. In conjunction with brushes, they guide excitation currents into rotating rotor windings to generate magnetic fields. Brushes and collector rings are contact-type structures and can generate lots of carbon powder, which tends to accumulate. A lot of heat will also be generated if strong currents pass through the contact area. Ignition of brushes and abnormal local temperatures are stubborn defects caused by the accumulation of carbon powder and overheating of contact areas during the operation of generators. This can severely influence the safety and stable operation of generating sets in the long term.

Making the Runner Servicing Platform "Move"

Award-winning Achievement: Revolving Platform for the Servicing of Turbine Runner at Xiluodu Hydropower Station

Award: First Prize for the Second Contest of Technological Innovations by Young Employees of CTG

Main Innovators: Cai Wei, Liu Dexin, Zhang Chengjun, Liu Changping, Zhao Shuang, Lu Mingming

As the term suggests, Platform for the Servicing of Turbine Runner is a platform for the servicing of the runner of the turbine. The runner of the turbine is located in the runner room. With the conical tube and draft tube below it, both having smooth metal walls, there is no point to hold to. It is 25 meters above the floor. Due to the design of the underground workshops of Xiluodu Hydropower Station, there is only one manhole in the conical tube and no manhole in the section for draft discharge from the generating sets. Therefore, it was impossible to set up a platform using traditional methods.

Self-made “Robot” to Realize Unattended Vacuum Oil Filling Operation of Transformers

Award-winning Achievement: New Oil-Gas Separation Facility for Vacuum Oil Filling Operation at the Service Shop

Award: Second Prize for the Second Contest of Technological Innovations by Young Employees of CTG

Main Innovators: Liu Peijun, Xu Jiang, Tang Ping, Zhang Jun, Bao Weimin, Wang Xiang

Once the oil reaches the specified level, oil filling is stopped immediately to avoid air going into the oil. Vacuum oil filling operation is a key procedure in the overhauling of large-scale oil-immersed transformers and reactors. The quality of this procedure will directly influence the project period and the quality of the overhaul.

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