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Wind power smooth control strategy considering the health state of energy storage system

An energy storage system and wind power technology, which is applied in wind power generation, energy storage, electrical components, etc., can solve the problems of large demand for wind power system energy storage capacity and difficulty in smooth control of wind power, so as to stabilize wind power output power fluctuations , Improve life, power fluctuation rate and low error index effect

Active Publication Date: 2022-07-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a wind power smoothing control strategy considering the health status of the energy storage system to solve some shortcomings of the existing energy storage participating in the smooth control of wind power output power. If the SOH is not considered As an input parameter of the control strategy, it will be difficult to achieve smooth control of wind power output, and it may also lead to a greater demand for energy storage capacity in the wind power system

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  • Wind power smooth control strategy considering the health state of energy storage system

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Embodiment Construction

[0011] In this patent, we will introduce FDKF for smoothing output power fluctuations of wind power generation systems. It is well known that there is a nonlinear relationship between battery power and wind power generation, and there is a nonlinear relationship between SOH and battery power. In this method, the nonlinear problem is solved by taking into account the dependence of input and output on battery power and SOH through the linear membership function of the fuzzy controller. To address control problems such as reducing power fluctuations and reducing battery capacity, a fuzzy-based control method is employed, which is also applicable to multi-constrained and abrupt inputs, such as the intermittency of wind speed. The control block diagram of the proposed FDKF scheme is as follows figure 1 shown.

[0012] figure 1 As shown, the Mamdani fuzzy logic controller (MFLC) takes SOH as input and generates a corresponding adjustment factor (ΔHfuzzy). Using the corresponding...

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Abstract

The invention discloses a wind power smooth control strategy considering the health state of the energy storage system. The randomness and fluctuation of the wind power output have attracted more and more attention to the safety and stability of the power system. The output power of the wind power system There are fluctuations. Before supplying power to the grid, the output power needs to be smoothed. This patent proposes a discrete Kalman filter method based on fuzzy control, which is used for the battery energy storage system to smooth the output power fluctuation of the wind power generation system. The method uses the health status of the battery as a feedback, which can not only smooth the output power of wind power, but also improve the health status of the battery by adaptively adjusting the battery power. The effectiveness of the method is verified by evaluating the power fluctuation rate and performance indicators.

Description

technical field [0001] The invention relates to a wind power smoothing control strategy, in particular to a wind power smoothing control strategy considering the health state of an energy storage system. Background technique [0002] With the rapid development of human society, people's demand for electric energy is increasing. At the same time, the problems of energy shortage and environmental pollution have become increasingly prominent, and vigorous development and utilization of wind energy has become an effective way to solve these problems. Due to the strong fluctuation and randomness of wind power output, large-scale wind power grid connection has a great impact on the power quality, frequency stability and operation scheduling of the system. How to take effective measures to stabilize the fluctuation of wind power output and improve the controllability of wind power has become an urgent problem to be solved. [0003] The rapid development of energy storage technolo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28H02J3/38H02J3/48
CPCH02J3/28H02J3/381H02J3/48H02J2300/28Y02E70/30
Inventor 夏向阳张嘉诚邓子豪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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