Active damping control method of ccfpifs applied to single-phase lcl type grid-connected inverter system
A damping control and inverter technology, applied in the field of single-phase LCL type grid-connected inverter systems, can solve problems such as poor grid-connected system stability, and achieve the effects of improving stability, simple operation method and practicality
Active Publication Date: 2021-08-03
CHINA UNIV OF GEOSCIENCES (WUHAN)
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[0007] In order to solve the problem of poor stability of the existing grid-connected system, the present invention provides a CCFPIFS active damping control method applied to the single-phase LCL type grid-connected inverter system, which is applied to the single-phase LCL type grid-connected inverter system In this method, the stability method mainly includes the following steps:
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[0061] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0062] Embodiments of the present invention provide a CCFPIFS active damping control method applied to a single-phase LCL grid-connected inverter system.
[0063] Please refer to figure 1 , figure 1 It is a flowchart of a CCFPIFS active damping control method applied to a single-phase LCL type grid-connected inverter system in an embodiment of the present invention, specifically including the following steps:
[0064] S10: According to the open-loop transfer function of the single-phase LCL grid-connected inverter system, establish a mathematical model of the grid-side current single-loop control LCL grid-connected inverter system based on the CCFPIFS active damping control method;
[0065] S20: Obtain the equivalent ...
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The invention provides a CCFPIFS active damping control method applied to a single-phase LCL type grid-connected inverter system. The mathematical model of the grid-side current single-loop control LCL type grid-connected inverter system of the control method; the equivalent virtual impedance of CCFPIFS is obtained according to the mathematical model; the single-phase LCL type grid-connected inverter is obtained through analysis according to the equivalent virtual impedance The frequency characteristics and system status of the inverter system; according to the frequency characteristics and system status, the constraints on the stability of the FOPI controller parameters in the single-phase LCL grid-connected inverter system are obtained, and the single-phase LCL grid-connected inverter system is improved. Inverter system stability. The invention has the beneficial effects of low economic cost, simple operation method, improved stability of the grid-connected inverter system, and practicality.
Description
technical field [0001] The invention relates to the field of single-phase LCL type grid-connected inverter systems, in particular to a CCFPIFS active damping control method applied to single-phase LCL type grid-connected inverter systems. Background technique [0002] With the depletion of conventional fossil energy and the aggravation of environmental pollution, new energy has received extensive attention. At present, the new energy power generation system is mainly based on solar energy, wind power and other power generation forms, and the distributed power generation system structure is widely used. [0003] Grid-connected inverters play an extremely important role as a key power electronic device for connecting new energy power generation systems to the grid. In order to ensure that the grid-connected current meets the requirements of relevant standards, the method of cascading L filters with inverters is often used, but this method will lead to bulky filter inductors a...
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IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/38H02J3/002H02J2203/20
Inventor 鞠槟檑王明阳潘寄庭王庆义
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)