"We should always serve as the qualified manager of the Pillars of a Great Power and ensure the stable operation to provide a fundamental guarantee for sustainable development of CYPC." Therefore, CYPC resolutely conducts the "two safeguards", practices and earnestly implements the guidelines of the important speech made by President Xi Jinping during his visit to Three Gorges Project, in order to facilitate the annual power generation of over 100 TWh through continuous safety management, improved equipment reliability and persistent lean operations.
The foundation of safety management is consolidated by strengthening the management and control of "five major risks". To ensure the long-term safe and stable operation of TGHPP under heavy load, CYPC has focused on the management and control of "five major risks" (i.e. major injuries, flooded powerhouses, widespread blackout, major equipment/facility accidents and network security) in 2018 under the objective of "zero-defect" equipment for the enhanced integration and utilization of trend analysis, on-line monitoring and other systems, closed-loop management practice of equipment defects & quality control and establishment of intrinsically safe power plants. TGHPP also initiates the long-term management under heavy load combined with key nodes (e.g. flood prevention and control, reservoir impoundment) while implementing the management and control of "five major risks", conducts intensified on-site inspections, repeated investigation and identification of safety risks, as well as focuses on the management and control of fire hazards (the sixth major risk). "No trivial matters for TGHPP" has become a common saying of our staff on the operation site. Every aspect of equipment management reflects the responsibility system of "each post with specific safety management responsibility, each person with specific equipment management responsibility". The implementation of "equipment control-oriented, scientific management-based and intrinsic safety-standardized" work safety management system throughout the process has consolidated a good foundation for work safety management.
The equipment maintenance is strengthened for continuous health improvement of power plant equipment. Currently, the period of equipment upgrading and Level-A maintenance has come for the first batch of units of TGHPP put into operation since 2003. In order to achieve the annual power generation, CYPC has implemented a new production management system taking equipment management as the core and an in-basin maintenance management system based on the core technologies, as well as conducted the continuously deepened diagnostic operation and condition-based maintenance targeting the key and difficult problems of equipment management for annual maintenance and routine maintenance/defect elimination, improved technical management and accurate production operations. In 2018, CYPC has completed the planning and organization of equipment diagnosis and evaluation, as well as scientific formulation of an annual maintenance plan to ensure all the necessary maintenance. The company has also conducted high-quality implementation of annual maintenance and production tasks, comprehensive quality management and strict quality control throughout the process covering the manufacturing of equipment, acceptance of incoming goods, installation and commissioning, establishment of the "one-time accomplishment" quality awareness, as well as strict implementation of three-level quality acceptance system. With the joint efforts of all staff, CYPC has successfully completed the 2017-2018 annual maintenance and production tasks of TGHPP, with the 2018-2019 annual maintenance (involving the overhaul of 15 units and technical upgrading of 130 items) achieved gradually now. Due to a series of effective technical measures that are safely and efficiently implemented, the operational risks of equipment are effectively eliminated, and the equipment safety & reliability and power plant indicators are also further improved.
Lean operation and multiple measures are utilized to guarantee the safe power generation. Concerning 32×700 MW huge hydro-generating units of TGHPP, the lean operation of large hydropower plants is required for the "instant start and power generation upon instructions". Through the 8 types 109 sets of on-line monitoring systems installed for the unit state monitoring, CYPC is the first in hydropower industry to implement the "diagnostic operation" mode for the real-time monitoring and operation trend analysis of all main/auxiliary equipment characteristics, which realizes the transformation of "post-processing" to "pre-control" in terms of hydropower plant operation management as well as significantly improves the safe operation and reliability of equipment and facilities. TGHPP has worked safely and stably for a long term since its operation, achieving over 4.13 million equipment operations, 26,000 start-ups/ shutdowns and 4,400 gate openings/closings without any man-made mis-operation. TGHPP has identified 76 high operational risks in 2018, and formulated corresponding control measures. During the flood season, continuous full operation of TGHPP units lasted for 1,184.37 hours including 352.38 hours of full-load operation, without any unscheduled shutdown that causes surplus water throughout the year. CYPC has guaranteed the safe and stable operation of the 34 units of TGHPP by means of strict & detailed management and continuous improvement, and laid a solid foundation for the innovation of power generation through the achievement of "zero serious/major accidents and zero staff casualties" objectives.