Double-reservoir self-adjusting tidal power generation method and system

Abstract

The invention discloses a dual-reservoir self-adjusting tidal power generation method and the system thereof. The tidal power generation system is composed of an upper reservoir, a water inlet gate of the upper reservoir, a pressure pipeline, a water-turbine generator set, a lower reservoir and a water outlet gate of the lower reservoir. The water inlet gate of the upper reservoir and the water outlet gate of the lower reservoir adopt the jacking-shaft type hydraulic power self-regulation gate, so that the upper reservoir can fully introduce the tidal water, and the lower reservoir can fully discharge the tail water of a power station; furthermore, the inertia rise and fall of the tide are utilized, thus keeping the working head of the water-turbine generator set to the maximum extent, thus effectively improving transformation efficiency by utilizing the tidal energy to generate power, and solving the problems with a tidal power station, such as sediment accumulation, etc. Compared with the previous tidal power generation system, the novel tidal power generation system has the advantages of high energy conversion efficiency, long service life, simple structure, convenient operation, all-weather continuous generation, saved investment, research and promotion value, etc.

Description

technical field [0001] The invention belongs to the field of tidal energy power generation, in particular to a double-storage self-regulating tidal energy power generation method and system thereof. Background technique [0002] The energy crisis and environmental pollution have become major issues facing human development, and the development of clean and renewable energy has become the consensus of all countries in the world. Tidal energy has become one of the green energy sources with the most development potential in the future due to its renewability, huge reserves and good environmental protection effects. Tidal power generation is currently the main way to utilize tidal energy. Due to the low conversion efficiency of tidal energy into electrical energy and the sedimentation of the power station reservoir, the tidal power station has a large one-time investment and low economic benefits, which affects the application scale of tidal power generation. [0003] Tidal pow...

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Problems solved by technology

Due to the low conversion efficiency of tidal energy into electrical energy and the sedimentation of the power station reservoir, the one-time investment of tidal power stations is large, and the economic benefits are not high, which affects the application scale of tidal power generation.

[0003] Tidal power stations mainly include three types: single-storage one-way type, single-storage two-way type and double-storage one-way type. The earliest single-storage one-way power station has a simple structure and low investment, but it cannot generate electricity continuously (average daily power generation 10-12h ), the efficiency of tidal energy utilization is low (the efficiency of the power station is only 22%), and this type of power station has been gradually abandoned; the single-storage bidirectional power station that appeared later can achieve partial continuous power generation (daily average power generation 16-20h), only Power generation cannot be generated when the water level inside and outside the reservoir is the same at low tide. Most of the currently planned tidal power stations adopt this type, but the structure of the plant and unit of this kind of power station is complex, and there are high requirements for the design parameters of the hydroelectric generating unit; The double-storage one-way power station can basically realize continuous power generation throughout the day. Because it is most in line with the principle of a hydropower station, it is possible to introduce mature hydropower technology, and it has begun to be favored by researchers. The utilization rate has not really been brought into play. In addition, due to the limitations of the existing technical conditions, the operating conditions of the hydroelectric generating units are complicated. However, this type of tidal power station is the main direction of future research and development. According to relevant scholars: The new development model of tidal power station will make the economics of tidal energy development, the controllability of power quality, and the expansion of resource development have the commercial value of large-scale market development

It should be pointed out that the above three types of tidal power stations have not yet considered the sediment control problem of the reservoir. Because the offshore tide carries a large amount of sediment, the sediment entering the reservoir will cause reservoir siltation, reduce the effective storage capacity and wear of the reservoir. Hydro turbines have a fatal impact on the service life of power stations, which is often overlooked by researchers

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