A Controllable Virtual Inertia Control Method for Optical Storage System Containing Supercapacitors
A supercapacitor, virtual inertia technology, applied in the field of signal processing, can solve problems such as affecting system stability, reducing system inertia, and not having mechanical rotational inertia
Active Publication Date: 2021-08-03
WUHAN UNIV
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Problems solved by technology
Since energy storage devices such as photovoltaics and supercapacitors are static components, they are usually connected to the grid by power electronic converters. Although they have a fast response speed, they do not have mechanical moments of inertia, which reduces the inertia of the system and affects the stability of the system. However, there is still a lack of theoretical support and practical methods for the inertial control of photovoltaic storage power generation systems containing supercapacitors.
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[0058] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0059] figure 1 It is a flow chart of the method of the present invention, and the simulation topology of the embodiment of the present invention is as follows figure 2 shown. The DC / DC converter on the photovoltaic cell side is connected in parallel with the DC / DC converter on the supercapacitor side, and is connected to the B2 bus through the DC / AC grid-connected inverter. During normal operation, the photovoltaic cell is in the state of maximum power tracking. To simplify the analysis, assume that the radiation intensity is 800w / m 2 . The present inv...
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The invention discloses a controllable virtual inertia control method of an optical storage system containing a supercapacitor. The invention calculates the frequency variation of the photovoltaic energy storage power generation system and collects the state of charge of the supercapacitor; if the frequency variation of the photovoltaic energy storage power generation system is not equal to 0, and the frequency of the real-time photovoltaic energy storage power generation system is lower than the grid frequency, the Virtual inertia control is performed when the inertial parameter of the supercapacitor is not equal to 0; if the frequency variation of the photovoltaic storage power generation system is not equal to 0, and the frequency of the real-time photovoltaic energy storage power generation system is greater than or equal to the grid frequency, the inertial parameter of the second supercapacitor is not equal to In the case of 0, perform virtual inertial control. The invention has the advantages that the virtual inertia of the supercapacitor can be flexibly adjusted and the system can provide timely inertia support.
Description
technical field [0001] The invention relates to the technical field of signal processing, in particular to a radar reference signal extraction method based on blind adaptive oblique projection. [0002] The invention belongs to the field of photovoltaic power generation methods, and relates to a virtual inertia control method for a power generation system, in particular to a controllable virtual inertia control method for an optical storage system containing a supercapacitor. Background technique [0003] New energy power generation has the advantages of saving investment, flexible power generation methods, and environmental compatibility. Its large-scale development and utilization have become an important choice for the sustainable development of global energy-economy-environment. Among them, the penetration rate of photovoltaics and energy storage is also increasing year by year, and the safe and stable operation of the power system will face more new challenges. Since e...
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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/383H02J3/32Y02E10/56Y02E70/30
Inventor 胡志坚杨黎
Owner WUHAN UNIV