Supplementary power generation system adopting photovoltaic power generation and solar heat energy-gas steam combined power generation

Abstract

The invention discloses a supplementary power generation system adopting photovoltaic power generation and solar heat energy-gas steam combined power generation. Different types of solar heat collectors are coupled with thermal processes of a power sub-system separately according to the different heat collection grades of the solar heat collectors, and a high-pressure evaporator of a waste heat boiler is replaced by virtue of a grooved solar field; meanwhile, a low-pressure evaporator of the waste heat boiler is replaced by virtue of a heat-pipe vacuum pipe heat collector, a staged ISCC systemis formed, and then coupled with a photovoltaic power generation system; moreover, a running scheduling strategy is designed, and the photovoltaic system is scheduled and complemented by arranging aheat storage device in the ISCC system, so that the long-time stability of the power generation amount of the complementary system is kept while the stable and efficient power generation of the two systems is ensured; and complementation and comprehensive gradient utilization for solar light energy, solar heat energy and fossil energy is realized, the capacity factor of the system is increased, impact on a power grid is reduced, and the stability of the power generation of the system is improved.

Description

technical field [0001] The invention belongs to the field of power generation, in particular to a complementary power generation system of photovoltaic power generation and solar thermal energy-gas steam combined power generation. Background technique [0002] The technologies relevant to the present invention mainly include photovoltaic power generation technology and solar energy and gas-steam combined cycle integrated system power generation technology, and the development status and characteristics of their respective technologies are as follows: [0003] 1. Photovoltaic power generation technology [0004] In recent years, the demand for global energy has continued to grow, traditional energy has been consumed in large quantities, reserves are increasingly depleted, and environmental problems brought about by energy activities have become increasingly complex. In the global environment of climate change, it is imminent to promote the development of new energy. Among r...

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Problems solved by technology

[0014] Most of the existing photovoltaic solar-thermal complementary technologies are non-compact. Concentrated solar thermal (CSP) power stations without fossil energy input are complementary to photovoltaic power stations. They need to be equipped with large-capacity heat storage tanks, which increases the cost. In addition, in the long-term In the absence of sunlight, after the stored heat is used up, the technology cannot generate power, the power generation stability is poor, and the long-term operation capacity is insufficient

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