Electricity larceny prevention monitoring apparatus and method of distributed photovoltaic power generation system

Abstract

The invention discloses an electricity larceny prevention monitoring apparatus and method of a distributed photovoltaic power generation system. The apparatus comprises a sunlight irradiation intensity monitoring unit, a core data processing unit and a feed network monitoring unit. The core data processing unit calculates convertible solar energy according to a time characteristic curve of sunlight irradiation intensity output by the sunlight irradiation intensity monitoring unit; the core data processing unit, according to time characteristic feed network currents, voltages, power and a time characteristic curve of electric energy, calculating to obtain the electric energy output from the photovoltaic power generation system; the core data processing unit makes a comparison between the time characteristics of parameters outputted by the two units in terms of consistency; if a deviation is smaller than a set value, it is determined that the electric energy output from the photovoltaic power generation system comes from the solar energy converted by a photovoltaic battery pack; and if the deviation of the consistency of the two is greater than the set value, electricity larceny alarm information is output. According to the invention, automatic monitoring, identification and early warning of potential electricity larceny behaviors of users of a distributed photovoltaic grid-connected power generation system can be realized at an early stage.

Description

technical field [0001] The invention relates to the field of anti-theft monitoring of distributed photovoltaic grid-connected power generation, in particular to an anti-theft electricity identification device and method suitable for distributed photovoltaic grid-connected power generation systems. Background technique [0002] Stealing electricity, that is, obtaining electric energy from the public power grid for free, is a phenomenon that has existed in countries all over the world for a long time. It has brought great losses and negative impacts on the country, enterprises and society. The corresponding anti-stealing system and technical means have also been continuously upgraded. [0003] Due to the gradual application of distributed photovoltaic power generation systems, the identity and role of traditional power users relative to grid companies have undergone significant changes. The original individual, household, industrial, commercial and other end users are pure el...

AI Technical Summary

Problems solved by technology

Generally, the on-grid electricity price subsidy for photovoltaic power generation is relatively large in the early stage, and decreases with the time of grid-connected power generation. The high on-grid electricity price subsidy in the early stage may lead to the inversion of the price of electricity sales and electricity purchases, that is, users actually sell electricity after the subsidy The price of electricity is higher than the price of electricity purchased. This situation also makes some criminals bypass the photovoltaic cell array to directly get electricity from the grid through the photovoltaic grid-connected inverter and then feed it into the grid to obtain high illegal electricity price subsidies.

[0005] How to know whether the distributed photovoltaic grid-connected power generation system has stolen electricity after it is connected to the grid, as well as the stolen electricity, there is no corresponding technical solution and method in the prior art, so a distributed photovoltaic power generation system is developed. The device and method for monitoring the stealing behavior of the system are imminent

Images