Prosumer unit control method based on intelligent loads

Abstract

The invention discloses a Prosumer unit control method based on intelligent loads. The Prosumer unit comprises a family key load connected in parallel to a bus, a household photovoltaic and an electric vehicle household charging pile. The method includes the following steps: (1) a number of non-key loads capable of withstanding preset voltage offset are selected, a power spring is connected in series to each non-key load to constitute an intelligent load, and the intelligent loads are connected in parallel to a bus; (2) a power model of the Prosumer unit is constructed; (3) a power adjustmentinstruction for adjusting active and reactive power is issued to the power springs in the intelligent loads by monitoring the amplitude and phase change of the voltage on the bus; (4) an objective function with the real-time power balance of the Prosumer unit as a constraint and the minimum daily load fluctuation of the power of the Prosumer unit as an optimization objective is constructed, and the objective function is solved by using an NSGA-II algorithm, so as to decompose the power adjustment instruction issued to the intelligent loads; and (5) the non-key loads of the intelligent loads execute the power adjustment instruction obtained from decomposition. The problem that the power of the Prosumer unit is uncontrollable and has large daily load fluctuation is solved.

Description

technical field [0001] The invention relates to power system control technology, in particular to an intelligent load-based Prosumer unit control method. Background technique [0002] With the development of renewable new energy and the continuous reduction of traditional energy reserves such as coal, the global fuel structure has undergone tremendous changes. Household photovoltaics are widely favored for their low cost of land use, low power transmission loss, and small investment in power transmission and transformation. In the future, my country will further promote the grid-connection of distributed photovoltaic power generation and promote residential rooftop photovoltaic projects. At the same time, as one of the representatives of new energy, new energy vehicles have become the trend of the future automotive industry because of their cleanliness and environmental protection. The research on electric vehicle charging technology has also become a hot topic at home and ...

AI Technical Summary

Problems solved by technology

[0004] 1. At present, the modeling of Prosumer units has not fully considered the situation that household photovoltaics and electric vehicles are connected to the home at the same time, and most of the existing research uses energy storage units to participate in energy management, and the user's economy is not high. The effect of reducing load fluctuations in the unit

In addition, the problem of power circulation in Prosumer has not been solved, and the circulation of active / reactive power cannot be effectively controlled

[0005] 2. At present, the research on the grid-connected technology of household photovoltaic power generation has been relatively in-depth, but the domestic household photovoltaic currently adopts the mode of all grid connection, and the principle of local consumption has not been fully considered

In addition, the problem of oversupply of household photovoltaics is mostly solved by combining energy storage devices with reactive power adjustment of household photovoltaic inverters, which has high costs and low utilization of photovoltaics

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