Solar chimney power generation and photovoltaic power generation combined structure and varied air duct control method
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A solar hot wind and photovoltaic power generation technology, applied in the field of solar power generation, can solve the problems of low efficiency, large land occupation, huge investment in solar hot wind wind power generation system, etc., and achieve the effects of improving output efficiency, low cost and reducing temperature
Active Publication Date: 2013-02-06
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Therefore, the solar thermal wind power generation system has disadvantages such as huge investment, large area occupation, and low efficiency.
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[0025] Now take the selected single windshield combination part as an example, the specific parameters of the system are as follows: the windshield is 2 meters high, 1 meter wide, and 1 cm thick, and the rated power of the stepping motor is 200W. The rated voltage is 100V and the rated current is 2A.
[0026] Taking the actual PV module temperature as 35 degrees Celsius as an example, the control method steps are as follows: ①Set the allowable output voltage to 1000V, current to 100A, rated power to 100kW, cut-in wind speed to 3 m / s, and cut-out wind speed to 20 m / s and the rated wind speed is 12 m / s, turn off the braking device 10; the initial temperature Ts of the photovoltaic module is 25 degrees Celsius, the temperature signal difference is 0.2 degrees Celsius, the initial timing time T is 5 minutes, and the initial windshield angle is = 0 degrees, each time the angle changes =5 degrees, execute step ②; ② determine that the wind speed reached by the solar thermal wind p...
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Abstract
A solar chimney power generation and photovoltaic power generation combined structure and a varied air duct control method belong to the technical field of solar power generation. The solar chimney power generation and photovoltaic power generation combined structure is characterized in that radiating fins are arranged below photovoltaic components, and a wind baffle plate assembly is arranged between a heat collection shelter and a heat absorption membrane. The control method is as follows: 1, setting initial values; 2, acquiring signals; 3, judging whether Vw exceeds V3, if so, executing the step 4, and otherwise, calling for MPPT (maximum power point tracking) and executing the step 6; 4, judging whether the system output power is larger than Pe, if so, executing the step 5, and otherwise, calling for MPPT and executing the step 6; 5, judging whether Vw exceeds Vo, if so, starting braking and executing the step 6, and otherwise, calling for MPPT and executing the step 6; 6, acquiring signals; 7, judging whether the component temperature signal is lower than Ts, if so, stopping the program, and otherwise, delaying acquiring the signals and executing the step 8; 8, judging whether the temperature difference exceeds Delta, if so, then T'=T-1, theta'=theta+Delta and executing the step9, and otherwise, T'=T+1, theta'=theta-Delta and executing the step 9; 9, judging whether T' is less than 1 minute, if so, T'=1, then executing the step 10, and otherwise, keeping T' unchanged and executing the step 10; and 10, judging whether theta is less than 45 degrees, if so, keeping theta unchanged and returning to the step 2, and otherwise, enabling theta to be 45 degrees and returning to the step 2.
Description
technical field [0001] The invention belongs to the technical field of solar power generation, and in particular relates to a solar hot wind wind power generation combined with a photovoltaic power generation structure and a variable air duct control method. Background technique [0002] At present, the structure of solar thermal wind power generation adopted at home and abroad is chimney type, which includes a bracket for installing the generator assembly, and a bottom assembly installed on the base including data acquisition and control modules, energy dissipation resistors, and braking devices. , chimney shell, heat collection shed, heat storage layer, top deflector and heat absorbing film laid on the foundation, generator assembly includes base, generator, fan blades with fixed pitch angle and bearings. The main operating principle is to use the heated air in the greenhouse to generate buoyancy due to the density difference under the action of gravity. The function of th...
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