An electromechanical transient simulation system and method for a battery energy storage system

Abstract

An electromechanical transient simulation model of a general-purpose battery energy storage system, including: plant station active power control module, plant station reactive power control module, converter active power control module, converter reactive power control module, voltage ride-through control module, Converter and interface module. The technical solution provided by the present invention adopts the idea of ​​modular modeling, which can not only meet the needs of grid-connected analysis of the energy storage power generation system, but also provide a basic simulation model for the stable operation and control decision-making of the energy storage power generation system after it is connected to the power grid. Under the condition of high simulation accuracy, the same model can be used to simulate different types of equipment, which reduces the management and maintenance costs of models and parameters, and is conducive to the simulation analysis of large-scale power grid electromechanical transients.

Description

technical field [0001] The invention relates to the field of power system simulation, in particular to an electromechanical transient simulation system and method for a battery energy storage system. Background technique [0002] Large-scale renewable energy grid-connected power generation represented by wind energy and solar energy is the development trend of the power system. As the proportion of installed capacity in the power system gradually increases, its impact on the power system is also gradually highlighted. Energy storage power generation systems It can effectively reduce intermittent energy power fluctuations and improve system stability. In addition, the energy storage system can also participate in frequency regulation and peak regulation of the power grid as well as coordinated and optimized scheduling. With voltage ride-through capability, it is necessary to research and develop an energy storage system simulation model with voltage ride-through simulation fu...

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Problems solved by technology

[0003] Electromechanical transient simulation is often used in large-scale power grid simulation, involving a large number of components and equipment, the simulation model must have a certain degree of generality, reduce the management and maintenance costs of models and parameters, the control structure of conventional energy storage electromechanical transient simulation models is simple, and the parameters are adaptable Insufficient versatility, especially the incomplete voltage ride-through simulation function, which cannot accurately reflect the dynamic characteristics of the actual power generation system or achieve specific simulation purposes; while the control of the electromagnetic transient simulation model is complex, different complex simulations are required for different types of equipment Model, control strategy selection and parameter debugging are complex and cumbersome during simulation analysis, and cannot be directly applied to electromechanical transient programs

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