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Photovoltaic cell power control system and method capable of automatically adapting to load demand changes

A photovoltaic cell and power control technology, applied in the direction of AC network voltage adjustment, etc., can solve problems such as grid voltage shock and damage to user electrical equipment.

Active Publication Date: 2014-07-30
WUHAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Recently, more and more photovoltaic cell power generation equipment is integrated into the grid. When the output power of photovoltaic cells is greater than the load demand, the excess power will be injected into the grid, causing the voltage value of the local grid to exceed the normal range of the user's load voltage, and damage the user's electrical equipment.
Therefore, the existing maximum power tracking technology will bring a certain voltage impact to the power grid

Method used

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  • Photovoltaic cell power control system and method capable of automatically adapting to load demand changes
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  • Photovoltaic cell power control system and method capable of automatically adapting to load demand changes

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[0026] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0027] please see figure 1 , figure 2 , the technical scheme adopted by the device of the present invention is: a photovoltaic battery power control system adaptive to load demand changes, including: photovoltaic battery 1, BOOST booster circuit 2, inverter system 3, first current sensor 4, second Two current sensor 5, power grid 6, load 7 and control system 8; Photovoltaic battery 1 communicates with BOOST step-up circuit 2 through wire, BOOST step-up circuit 2 communicates with inverter system 3 through wire, and inverter system 3 connects with the second...

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Abstract

The invention discloses a photovoltaic cell power control system and method capable of automatically adapting to load demand changes. The photovoltaic cell power control system comprises a photovoltaic cell controller, wherein the photovoltaic cell controller controls the output power of a photovoltaic cell. Current sensors collect currents. The method comprises the steps that firstly, the photovoltaic output current and the load current are collected through the current sensors, then, the relation between the output power of the photovoltaic cell and the load demand of the photovoltaic cell is judged through the collected currents, and finally, the photovoltaic cell controller controls the output power of the photovoltaic cell according to the relation. According to the photovoltaic cell power control system and method capable of automatically adapting to the load demand changes, the relation between the output power of the photovoltaic cell and the load demand of the photovoltaic cell is obtained through the photovoltaic output current and the load current, using is flexible, the judging method engineering for the load demand is easy to implement, and impact on the network voltage is small.

Description

technical field [0001] The invention belongs to the technical field of new energy control, and more specifically relates to a photovoltaic cell power control system and method adaptive to load demand changes. Background technique [0002] Energy is an indispensable material basis for human survival and development. The utilization of fossil energy is the main way of current energy utilization. Due to the large amount of harmful gases, solid particles and pollutants produced during the utilization of fossil energy, the living environment of human beings is deteriorating day by day. And fossil energy is a kind of non-renewable energy, which can be developed has become more and more limited. As an emerging green and renewable energy source, photovoltaic cells have attracted the attention of governments around the world due to their huge volume, safety and cleanliness. How to increase the output power of photovoltaic cells has become a research hotspot at home and abroad rece...

Claims

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Application Information

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IPC IPC(8): H02J3/12
Inventor 李德识李磊陈健
Owner WUHAN UNIV
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