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Control method and device for flywheel energy storage system

A technology of flywheel energy storage and control method, which is applied to control electromechanical transmission devices, control systems, control generators, etc., can solve the problems of randomness of flywheel energy storage control system, etc. To achieve the effect of smooth power

Inactive Publication Date: 2018-04-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to overcome the complexity of the control system in the prior art, and it is difficult to solve the randomness of the flywheel energy storage control system caused by the randomness of wind speed, and to provide a control method for the flywheel energy storage system and device

Method used

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  • Control method and device for flywheel energy storage system
  • Control method and device for flywheel energy storage system
  • Control method and device for flywheel energy storage system

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Embodiment Construction

[0054] The present invention will be described in detail below with reference to the accompanying drawings.

[0055] Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.

[0056]It should be understood, however, that the invention is not limited to the particular exemplary embodiments disclosed, but covers all modifications, equivalents, and alternatives falling within the scope of the disclosure. Throughout the description of the figures, the same reference numerals denote the same elements.

[0057] Also, it should be understood that as used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Also it will be understood that when a component or unit is referred to as being “connected” or “coupled” to another component or unit, it can be directly connected or coupled to the other component or uni...

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Abstract

The invention provides a control method and a device for a flywheel energy storage system. The method comprises the steps of a, with the angular velocity, the d-axis current and the q-axis current of A, a flywheel as state variables, and the energy storage capacity of the flywheel as a control variable, constructing a model for the energy storage system of the flywheel, and discretizing the model according to the sampling time; B, constructing a performance index based on a second-order Renyi entropy, and determining an optimal input control variable increment with the partial derivative of the input control variable increment to be zero based on the performance index; C, determining a current optimal input control variable based on the optimal input control variable increment. According to the control method and device, based on the simplified energy storage model of the flywheel, a controller for the energy storage system of the flywheel can be designed. Meanwhile, the excess energy of the flywheel is stored, or the deficient energy of the flywheel is supplemented. In this way, a wind turbine generator set is ensured to transmit a smoothing power to the power grid.

Description

technical field [0001] The invention relates to the field of renewable energy technology, in particular to the field of control systems for wind power generating sets. Background technique [0002] To a certain extent, wind power can alleviate the pressure of my country's energy demand, improve my country's energy structure, and promote the sustainable development of economy and society. However, the uncertainty of wind resources and the operating characteristics of wind turbines determine that wind turbines have strong intermittent, fluctuating and anti-peaking characteristics, which have a great impact on the operation and planning of the power system. The most obvious one is that due to the unpredictable and random fluctuation of wind speed, the output active power of wind turbines below the rated wind speed fluctuates with the change of wind speed. The fluctuation of active power output by wind turbines may have a greater impact on the power quality of the grid and redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/30H02P21/06
CPCH02J3/28H02P21/06Y02E10/76Y02E60/16
Inventor 张金芳郭萍赵建勋
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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