System for complementary power supply between small power station and commercial power grid

Abstract

The invention relates to the technical field of electric energy monitors, in particular to a system for complementary power supply between a small power station and a commercial power grid. The system comprises a direct-current generator, an inverter, a power grid switching device connected with the commercial power grid, a bidirectional wireless electric energy monitor and an electric energy monitoring operation switch, wherein the output end of the inverter is connected with the power grid switching device; the output end of the power grid switching device is connected with a family bus; the bidirectional wireless electric energy monitor is coupled with the power grid switching device and provided with a data acquisition module capable of acquiring a current value input or output by thepower grid switching device; the bidirectional wireless electric energy monitor can remotely detect the electricity quantity of an electric appliance, and controls on and off of the electric appliance; and the bidirectional wireless electric energy monitor indicates a user to turn on or turn off electric appliances by comparing electricity quantity generated by the power generator with the electricity quantity used by the electric appliance, so that the using time of the electric appliance is adjusted; and the system is favorable for rational utilization of the electric energy.

Description

technical field [0001] The invention relates to the technical field of electric energy monitors, in particular to a system for complementary power supply of small power generation and commercial power grids. Background technique [0002] Energy is the most basic driving force for the development and economic growth of the whole world, and it is the basis for human survival. development economic strategy. [0003] Solar energy is a clean, harmless, huge and widely distributed energy source. With the development of technology, the cost of solar power generation is getting lower and lower, and all countries are encouraging the use of solar energy. However, the energy density of solar energy is low, and it varies from place to place and from time to time. This is the main problem faced by the development and utilization of solar energy. This leads to the fact that when the electricity consumption is low during the day, the solar energy generates more electricity than needs to b...

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Problems solved by technology

The applicant disclosed a power monitor in the Chinese patent "Two-way Wireless Power Monitor" with the patent number of 200820203804.1, which detects the power consumption of electrical appliances through the power monitoring operation switch, and can remotely control the power monitoring operation switch through wireless signals Start or shut down electrical appliances, so that the electricity consumption of electrical appliances can be managed, but the power generation of the above-mentioned small power generation equipment is changing, and this monitor still has defects, that is, it cannot turn on the electrical appliances when the power generation is large to make rational use of resources, or Turn off some electrical appliances when the power generation is low to avoid excessive use of mains power

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