Micro-grid medium and small hydropower station abandoned water electric quantity calculation method considering runoff volume

Abstract

The invention belongs to the technical field of power systems and automation thereof, and relates to a micro-grid medium and small hydropower station abandoned water electric quantity calculation method considering runoff volume. The invention is directed to the uncertainty of the inflow flow of the small hydropower station, the wind speed of the wind farm, and the sunshine intensity of the photovoltaic power station. The probability analysis method is used to calculate the initial flow value of the small hydropower station, the wind farm, the wind farm, the wind farm speed, and the solar farm's sunshine intensity according to the normal distribution law. Considering the limitation of the voltage variation in the microgrid and the microgrid accessing the distribution network, the installedcapacity is reduced according to the proportion of the initial installed capacity of small hydropower stations, wind farms and photovoltaic power stations. The expected goal is to achieve new energyutilization. The power generation efficiency, the utilization rate of power generation equipment, and the annual utilization hours of power generation equipment are maximized, and the amount of powergeneration in the operating cycles of day, month, year, and years is increased.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and relates to a method for calculating the amount of abandoned water in small and medium-sized hydropower stations in microgrids considering runoff. Background technique [0002] A microgrid is a grid form that integrates distributed sources (small hydropower, small wind power, photovoltaic power generation)-loads (water, electricity, gas, cooling, and heat loads) in a certain way. The microgrid is connected to the main grid at voltage levels such as 380V, 10kV, and 35kV. Under normal operating conditions, it operates in parallel with the main grid. Under heavy load, the microgrid absorbs power from the main grid, and may inject power into the main grid under light load. Power: In the case of a partial fault in the main grid or in the case of a fault in an adjacent micro-grid, it can operate in an isolated grid. Under the premise of ensuring power quality, t...

AI Technical Summary

Problems solved by technology

It can be seen that the existing technologies for calculating the power generation, generation capacity and installed capacity of the microgrid distributed power system do not fully consider the uncertainty and randomness of the influencing factors, and the applicability, practicability and applicability of the calculation methods are also difficult to satisfy.

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