Photovoltaic power generation plan tracking method and device for light storage combined power generation system

A technology of combined power generation and photovoltaic power generation, applied in the field of electrical engineering, can solve problems such as insufficient grid-connected stability and safety of photovoltaic power generation, and achieve improved stability and safety, good robustness, and strong anti-interference ability. Effect

Pending Publication Date: 2020-08-11
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] The present invention provides a photovoltaic power generation plan tracking method and system for a photovoltaic-storage combined power generation system to overcome the current problems of insufficient stability and security of photovoltaic power generation grid-connected

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  • Photovoltaic power generation plan tracking method and device for light storage combined power generation system

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[0020] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0021] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides a photovoltaic power generation plan tracking method and device for a light storage combined power generation system. The method comprises the steps of determining an output increment control instruction sequence of an energy storage system in the photovoltaic-energy storage combined power generation system based on a prediction control optimization objective function when prediction control of N forward prediction steps is adopted; generating the output power of the energy storage system at the next moment according to the obtained current output power of the energy storage system in the light storage combined power generation system and the first output increment value in the output increment control instruction sequence; and sending the output power of the energystorage system at the next moment to the energy storage system, so that the energy storage system responds to the output power and tracks the photovoltaic power generation plan power at the next moment together with a photovoltaic system in a target photovoltaic-energy storage combined power generation system. The light storage combined power generation system implementing the method can track a photovoltaic power generation plan with high precision, and the state of charge of the energy storage system is kept in a stable and safe state.

Description

technical field [0001] The present invention relates to the technical field of electrical engineering, and more specifically, to a photovoltaic power generation plan tracking method and device for a combined photovoltaic storage power generation system. Background technique [0002] Photovoltaic has become an important part of China's electricity supply. However, there is still a large deviation between the actual power generated by photovoltaics and the current forecast. The fluctuation and intermittency of photovoltaic power generation will adversely affect the operation of the power grid. [0003] On the other hand, large-scale energy storage technology is becoming more and more mature. Photovoltaic systems and energy storage systems are combined to form a combined solar-storage power generation system, which can make up for the disadvantages of photovoltaic power generation by using energy storage systems, improve the tracking accuracy of photovoltaic power generation p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/28
CPCH02J3/381H02J3/46H02J3/28H02J2300/24H02J2203/20Y02E10/56Y02E70/30
Inventor 李相俊祁希何山贾学翠王上行马会萌杨水丽边立郭维君马玉芳周雨霖蒋雪
Owner CHINA ELECTRIC POWER RES INST
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