Yellow River upstream cascade hydroelectric station operation design and optimized dispatching method as well as equipment

Abstract

The invention relates to a method for united operation design and optimized dispatching of a Yellow River upstream cascade hydroelectric station, which comprising the following steps of: measuring daily average reservoir level and downstream daily average tail-water level of each power station through a water level sensor; measuring discharged flow of each power station through an ultrasonic flowmeter; establishing a cascade reservoir united optimized dispatching model through a cascade hydroelectric station united optimized dispatching model module; computing and analyzing a cascade hydroelectric station united optimized dispatching path through a dispatching path computation and analysis module; carrying out unified operation design on a cascade hydroelectric station group system through a cascade hydroelectric station group system unified operation design module; and carrying out unified dispatching on the cascade hydroelectric station group system through a cascade hydroelectric station group system unified dispatching module. The invention is simple, clear and practical with high pertinence, can enable average annual energy output of a Yellow River upstream cascade power station group after the power stations in Laxiwa and Jishi valley are put into operation to be increased by about 470 million degrees, and the water supply guarantee rate of Lanzhou cross section to reach95 percent, and has remarkable technical economic benefit.

Description

technical field [0001] The invention relates to a method and equipment for operation design and optimal dispatching of cascade hydropower stations in the upper reaches of the Yellow River. Background technique [0002] Throughout the history of research on optimal dispatching of cascade reservoirs in the upper reaches of the Yellow River, in the early and mid-term, it was mainly analytical modeling and algorithm improvement, focusing on research on dispatching theory. In recent years, with the maturation and perfection of theoretical research, the research on optimal operation of reservoirs has also paid more attention to the combination with actual production and the transformation of research results into production, so as to bridge the gap between theoretical research and practical application. Combined with production needs and specific problems, it has become a hot spot and development trend in reservoir optimal scheduling research to study and explore reservoir schedul...

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Problems solved by technology

The Longyangxia Reservoir has many years of adjustment capacity, and is in the leading position among the cascade reservoirs. It has a certain adjustment flexibility and plays a compensatory role in the cascade joint dispatching. However, the compensation adjustment will lose the power generation benefits of the upstream power station

[0004] Since the establishment of the joint dispatching mechanism of Longliu and Liuliu reservoirs for 20 years, with the continuous expansion of cascade power station groups, the scale and structure of the northwest power grid have undergone fundamental changes, and the comprehensive water demand in the area along the Yellow River has also undergone significant changes, making the original Longlong The design scheme of conventional combined dispatching of runoff in Yangxia and Liujiaxia reservoirs cannot meet the current needs of safe and economical operation of cascade hydropower dispatching in the upper reaches of the Yellow River

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