Intelligent solar cell component and control method of array thereof

Abstract

The invention discloses an intelligent solar cell component and a control method of an array thereof. An intelligent power electronic converter in which a microprocessor serves as a control core is arranged at a junction box of the traditional solar cell component and has a data communication function; system information such as a direct current (DC) bus voltage of a photovoltaic system, the maximal output power of other components in the same serial string and the like can be acquired through the communication function; the system information acquired through the communication function is higher than that of the maximal power point of the component; and the output voltage and the output current are automatically adjusted by a power weight matching method, so that the output energy of the component is maximized. By the method, each component can output the maximal electric energy.

Description

technical field [0001] The invention relates to a control method of a solar component including an intelligent power electronic converter and an array thereof, belonging to the fields of electrical technology and energy technology. Background technique [0002] Since the beginning of the 21st century, the energy problem has become an important problem perplexing society, economy and environment. As a renewable green energy, solar energy has been vigorously developed at home and abroad in recent years. [0003] In the photovoltaic power generation system, photovoltaic cell modules with consistent performance are generally selected to form a battery array in series and parallel. In the system design, the principle of not being shielded as much as possible should be followed in the system design. With the proposal and implementation of "smart grid", distributed systems such as the combination of solar power and buildings will occupy a larger and larger proportion in the solar p...

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Problems solved by technology

Although the use of bypass diodes can play a role in the protection of solar cell components, when the bypass diodes work, the bypassed components will not generate any electrical energy, and if there is a component in the series components that produces a small photocurrent (Small power generation) When the corresponding bypass diode has not yet worked, the output photocurrent of the series components used will be limited to this small value, resulting in these components not working at the maximum power point, which greatly affects the solar energy. The power generation of the battery array, a test by National Semiconductor Corporation of the United States showed that when 8% to 16% of the solar panels are shaded, the power generation of the solar power generation system will drop by as much as 35% to 40%

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