Microgrid Frequency Adaptive Learning Control Method
A technology of frequency self-adaptation and learning control, which is applied in the direction of circuit devices, AC network circuits, reducing/preventing power oscillation, etc. It can solve the problems that it is difficult to obtain the analytical solution of the nonlinear system, and the frequency of the microgrid cannot be effectively adjusted.
Active Publication Date: 2020-04-07
INST OF AUTOMATION CHINESE ACAD OF SCI
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[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that it is difficult to obtain the analytical solution of the nonlinear system in the prior art, it is impossible to effectively adjust the frequency of the microgrid and improve the stability of the frequency of the microgrid. The present invention provides a A microgrid frequency adaptive learning control method, the method comprising:
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[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention
[0065] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[006...
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The invention belongs to the technical field of microgrid frequency control, specifically to a microgrid frequency adaptive learning control method. The invention aims to solve the problem that effective adjustment of the frequency of a microgrid and improvement of the stability of the frequency of the microgrid cannot be realized in the prior art. The invention provides a microgrid frequency adaptive learning control method, comprising the following steps: calculating a second state parameter of a microgrid system based on a first state parameter of the microgrid system which is obtained in advance; calculating a control matrix and a disturbance matrix of the microgrid system according to the second state parameter and a pre-built first neural network model; calculating a utility functionof the microgrid system according to the second state parameter; calculating a cost function of the microgrid system according to the utility function; and based on the second state parameter, control matrix, disturbance matrix, utility function and cost function, adopting an adaptive dynamic planning method to calculate the optimal control law of microgrid system frequency. The method provided by the invention can effectively improve the frequency stability of the microgrid system.
Description
technical field [0001] The invention belongs to the technical field of micro-grid frequency control, and in particular relates to a micro-grid frequency self-adaptive learning control method. Background technique [0002] In modern power systems, microgrid has become an indispensable part. Microgrid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy, and realize the highly reliable supply of various energy forms for loads. Smart grid transition. However, the integration of distributed and renewable energy into the microgrid will inevitably affect the stability of the microgrid, especially the imbalance of load consumption and power generation, which will lead to deviations in the frequency of the mi...
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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 王鼎张启超赵博
Owner INST OF AUTOMATION CHINESE ACAD OF SCI