Construction method of unified coupling model of multi-energy power system based on equivalent power source

Abstract

The invention relates to an equivalent power source-based unified multi-energy power system coupling model building method. A unified coupling model of various heterogeneous energy generation units and power plants and stations is built by adopting a power source equivalence principle. According to the method, each heterogeneous energy generation unit is equivalent to a voltage source and a controllable resistor connected in series to form a unified generation model; various heterogeneous energy power plants and stations are equivalent to controllable current sources separately; an energy storage device is equivalent to a capacitor; and coupling grid connection is carried out to form a unified multi-energy power system coupling model. The installed capacity of the power plants and stationscan be adjusted through control coefficients of the controllable current sources. The built unified multi-energy power system coupling model is suitable for static energy flow analysis of a multi-energy power system and is also suitable for dynamic process analysis, unified description of multiple time scales of the multi-energy power system is achieved, and a theoretical basis is provided for coordinated control and optimal scheduling of the multi-energy power system.

Description

technical field [0001] The invention relates to the field of power system modeling and simulation, in particular to a method for establishing a unified coupling model of a power generation system including multiple heterogeneous energy sources such as wind, light, water, and gas for energy storage. Background technique [0002] Excessive use of fossil energy has brought about a series of problems such as resource depletion, climate deterioration and environmental pollution, which seriously threaten the sustainable development of human society. Making full use of renewable energy such as water energy, solar energy, wind energy, biomass energy, ocean energy, and geothermal energy for power generation has become a focus of attention. The connection of a large amount of renewable energy with characteristics of randomness, volatility, and dispersion and the coupling of multiple energy systems is becoming increasingly close, which will lead to a new generation of power system with...

AI Technical Summary

Problems solved by technology

[0003] However, for the modeling and simulation of power generation systems with multiple heterogeneous energy sources, power generation system models of different energy types are generally established separately, but there is no unified model for power generation systems that include wind, light, water, gas and other heterogeneous energy sources. Model

Therefore, it is impossible to fully tap the adjustment capabilities of various energy generation systems, and it is impossible to ensure that the power grid's consumption of renewable energy generation is optimal.

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