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

An energy storage system and state-of-health technology, which is applied in wind power generation, energy storage, electrical components, etc., can solve the problems of large demand for energy storage capacity of wind power systems, and it is difficult to achieve smooth control of wind power, so as to stabilize wind power output power fluctuations. , improve life, improve the effect of SOH

Active Publication Date: 2021-02-02
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 health state of energy storage system
  • Wind power smooth control strategy considering health state of energy storage system

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Embodiment Construction

[0012] In this patent, we will introduce FDKF for smoothing output power fluctuations of wind power generation systems. It is well known that battery power has a nonlinear relationship with wind power, and there is a nonlinear relationship between SOH and battery power. In this method, the nonlinear problem is solved by considering the dependence of the input and output on the battery power and SOH through the linear membership function of the fuzzy controller. To solve the control problems such as reducing power fluctuations and reducing battery capacity, a fuzzy-based control method is adopted, which is also suitable for 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.

[0013] figure 1 As shown, the Mamdani fuzzy logic controller (MFLC) takes SOH as input and generates a corresponding adjustment factor (ΔHfuzzy). Using the corresponding fuzzy rules, an adjust...

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Abstract

The invention discloses a wind power smooth control strategy considering the health state of an energy storage system. The influence of randomness and volatility of wind power output on the safety andstability of a power system is more and more concerned, and the output power of the wind power system fluctuates. Before power is supplied to a power grid, the output power needs to be smooth. The invention provides a discrete Kalman filtering method based on fuzzy control. The discrete Kalman filtering method is used for smoothing output power fluctuation of a wind power generation system of a battery energy storage system. According to the method, the health state of the battery serves as feedback, the wind power output power can be smoothed, and the health state of the battery can be improved by adaptively adjusting the power of the battery. The effectiveness of the method is verified by evaluating the power fluctuation ratio and the performance index.

Description

technical field [0001] The invention relates to a smooth control strategy of wind power generation, in particular to a smooth control strategy of wind power 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 continues to increase. At the same time, the problems of energy shortage and environmental pollution are becoming more and more prominent, and vigorously developing and utilizing wind energy has become an effective way to solve these problems. Due to the strong volatility and randomness of wind power output, large-scale wind power grid integration will have a greater 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 ...

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Application Information

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Patent Type & Authority Applications(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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