Energy storage power adjusting method and device and energy storage system

Abstract

The invention provides an energy storage power adjusting method and device and an energy storage system, and relates to the technical field of new energies. The method comprises the steps: obtaining the working state of the energy storage system, obtaining a corresponding detection signal according to the working state, wherein the working state comprises an energy release state and / or an energy charging state; judging whether the energy storage system meets an energy storage power adjustment condition according to the detection signal; when the energy storage power adjustment condition is met, generating a signal code corresponding to the numerical value of the detection signal according to the detection signal; and determining a control signal according to the signal code, and adjusting the energy exchange mode of the energy storage system according to the control signal. According to the invention, rapid coding is carried out through the obtained detection signal to determine the control signal, and the energy storage power is adjusted in a stepped manner according to the control signal, so as to eliminate reverse flow or avoid excessive operation of the transformer, realize simple and rapid response of power control and adjustment, and effectively improve the stability of system operation.

Description

technical field [0001] The present invention relates to the field of new energy technology, in particular to an energy storage power adjustment method, device and energy storage system. Background technique [0002] With the continuous progress of social development, both in national development and people's livelihood construction, more and more attention is paid to the development of energy. If we want to achieve better development and construction, we must rely on sufficient energy support. Today's society has paid more and more attention to the development of new energy, among which, the large-scale utilization of renewable energy is mainly based on solar energy and wind energy. Compared with fossil fuels, new energy is not only clean and pollution-free, but also has the characteristics of inexhaustible, inexhaustible and renewable, which makes the new energy industry attract people's attention. However, since the light and wind speed of new energy are mostly natural re...

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Problems solved by technology

[0003] In the prior art, the control of the output of the energy storage system has always been at the same control density and accuracy. It is mainly used for the use of local loads during discharge. The sudden change of the load causes the reverse flow of electric energy, and when there is a reverse flow of electric energy, the reduction of energy storage or photovoltaic output is basically the same across the board. energy output, such a control method has a great impact on the utilization efficiency of energy storage

When the energy storage is charging, considering the sudden increase of the load, it will face the risk of exceeding the rated power of the transformer in the factory.

However, most of the existing schemes are designed under the condition that the control accuracy is very accurate and the power control response is fast. However, in actual operation, the execution cycle of the algorithm and the control accuracy of the power distribution have a great impact. Deviation, affecting the reliability of system operation

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