A method and device for optimal configuration of hybrid energy storage capacity in an active distribution network

Abstract

The embodiment of the invention discloses an active power distribution network hybrid energy storage capacity optimal configuration method and device for solving the technical problem that the influence caused by energy storage service life loss to capacity optimal configuration is not counted according to an existing hybrid energy storage system. The method comprises the steps that for overcoming the defects of an existing active power distribution network hybrid energy storage capacity configuration method, the influence caused by service life loss and optimal operation to energy storage capacity configuration is considered, and an active power distribution network hybrid energy storage capacity optimal configuration model based on discrete fourier transform is put forward. According to the method, the hybrid energy storage system power is distributed based on discrete fourier transform, a rain-flow method is adopted for calculating the energy type energy storage service life loss, meanwhile, the time-of-use electricity price and electricity price transaction difference under the market environment is considered, power distribution network and superior power grid electric energy transactions are counted, the hybrid energy storage system charging and discharging states are optimized, and planning-operation coordination optimization is achieved.

Description

Technical field [0001] The invention relates to the field of power system analysis, in particular to a method and device for optimizing the configuration of hybrid energy storage capacity of an active distribution network. Background technique [0002] The randomness and volatility of renewable energy such as wind power and photovoltaics pose a huge challenge to its high proportion of access to the grid, and the proposal of the active distribution network and its technological development provide conditions for achieving a high proportion of renewable energy penetration. Energy storage has significant advantages in terms of power regulation, which can increase the penetration rate of renewable energy and improve the trend. The reasonable configuration of energy storage plays an important role in improving the economy of the system. A single type of energy storage, such as energy storage, has high density and low cost, but its charge and discharge power is small, and its life is e...

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Problems solved by technology

[0004] Embodiments of the present invention provide a hybrid energy storage capacity optimization configuration method and device in an active distribution network, which solves the problem that the existing hybrid energy storage system optimization configuration method does not take into account the impact of energy storage life loss on capacity optimization configuration technical problem

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