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Active disturbance rejection control technology-based method for controlling synchronization of photovoltaic power generation system

A photovoltaic power generation system and active disturbance rejection control technology, applied in photovoltaic power generation, single-grid parallel feeding arrangement, etc., can solve the problems of no solution, poor universality, etc., and achieve good application prospects, good robustness and adaptability effect of ability

Inactive Publication Date: 2011-02-09
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Nowadays, there are various grid-connected technologies. Because photovoltaic power generation is affected by environmental changes, grid fluctuations, load mutations, and model parameter uncertainties, it is difficult to achieve satisfactory results using conventional control methods. In addition, each method has Its use characteristics and applicable occasions are only for some specific loads or a small field, and its universality is poor, and it brings various problems. So far, no universally recognized solution has been formed.

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  • Active disturbance rejection control technology-based method for controlling synchronization of photovoltaic power generation system
  • Active disturbance rejection control technology-based method for controlling synchronization of photovoltaic power generation system
  • Active disturbance rejection control technology-based method for controlling synchronization of photovoltaic power generation system

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Embodiment

[0046] A grid-connected control method for photovoltaic power generation systems based on Active Disturbance Rejection Control (ADRC) (see attached figure 1 , 2 , 3). The method includes:

[0047] Analyze the controlled object of the photovoltaic power generation system, determine the input and output quantities and control quantities of the object, arrange the transition process and extract the differential signal for the reference input of the controlled object through the tracking differentiator (TD) in the active disturbance rejection control technology; through it The Extended State Observer (ESO) of the system dynamically observes and estimates the uncertain factors and external disturbances in the system model; it adjusts the control quantity through its nonlinear state error feedback law (NLSEF) (see appendix figure 1 ). Adjust the parameters of each part during the control process. Controlled implementation process (as attached Figure 4 ) combined with the algor...

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Abstract

The invention provides an active disturbance rejection control-based method for controlling synchronization of a photovoltaic power generation system. The photovoltaic power generation system is a non-linear system, influenced by power grid and environment and strongly disturbed by the outside and has nonlinear uncertain factors. According to the work characteristics of the system, the active disturbance rejection control technology is adopted to realize effective control of the system. The system dynamically observes the uncertain factors in the system model and external disturbance by utilizing an extended state observer of an active disturbance rejection controller (ADRC) to ensure that the system has good adaptability to disturbance, can adapt to changes of an object model and the surrounding environment in a large range without influencing the control quality of the controller, and represents well robustness.

Description

【Technical field】 [0001] The invention relates to a grid-connected control method of a photovoltaic power generation system, mainly a grid-connected control method based on active disturbance rejection control technology. It belongs to the cross-technical field of new energy power generation and control systems and power electronics. 【Background technique】 [0002] As the world's energy depletion problem is becoming more and more serious, solar energy has become the focus of human development and utilization of green renewable energy due to its renewability and non-pollution, and is moving from supplementary energy to alternative energy. inevitable development trend. In the grid-connected photovoltaic power generation system, the tracking control of the grid is directly related to the quality of the output power and the operating efficiency of the system. It is the core and technical key of the system. The performance of the control system determines the success or failure ...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 周雪松梁芳马幼捷宋代春陈浩刘思佳
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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