Photovoltaic power plant equivalent modeling method based on improved fuzzy clustering algorithm

A photovoltaic power station, equivalent modeling technology, applied in the field of value modeling, can solve the problem of not guaranteed to converge to the global optimal solution, may converge to the local extremum or saddle point and other problems

Active Publication Date: 2019-04-16
HEFEI UNIV OF TECH +1
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Problems solved by technology

In FCM, the sum of the membership degrees of the same sample belonging to all classes is 1, which makes it very sensitive to noise and outlier points; the iterative descent algorithm adopt

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  • Photovoltaic power plant equivalent modeling method based on improved fuzzy clustering algorithm
  • Photovoltaic power plant equivalent modeling method based on improved fuzzy clustering algorithm
  • Photovoltaic power plant equivalent modeling method based on improved fuzzy clustering algorithm

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Embodiment Construction

[0068] In this example, if figure 2 As shown, an equivalent modeling method for photovoltaic power plants based on the improved fuzzy clustering algorithm is carried out as follows:

[0069] Step 1. Determine the clustering index of each photovoltaic power generation unit and perform standardized processing:

[0070] Step 1.1. Establish a grid-connected simulation model of photovoltaic power generation units, and set different parameters of photovoltaic arrays and grid-connected inverters; characteristic curve;

[0071] Step 1.2. The grid-connected transient characteristics of the regional centralized photovoltaic power generation system are mainly determined by the grid-connected inverter, and the control parameter vector of the photovoltaic inverter is [K UP , K UI , K QP , K QI , K IP , K II ], parameter K UP , K UI It has a great influence on the photovoltaic active output characteristics, and the parameter K QP , K QI The influence on the photovoltaic reactive...

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Abstract

The invention discloses a photovoltaic power plant equivalent modeling method based on an improved fuzzy clustering algorithm. The method comprises the steps of (1) determining a clustering indicatorof each photovoltaic power generation unit and performing standardization processing, (2) setting clustering parameters and initializing a membership degree matrix, (3) clustering photovoltaic power generation units by an improved fuzzy clustering algorithm, (4) calculating equivalent parameters according to a clustering result and combining the photovoltaic power generation units, and (5) verifying the correctness of an equivalent model by error analysis. According to the method, the photovoltaic power generation units can be scientifically and effectively grouped, and therefore, the accuracyof an equivalent model of a large-scale photovoltaic power station can be greatly improved.

Description

technical field [0001] The invention relates to the field of power system simulation analysis, in particular to an equivalent modeling method for a large-scale grid-connected photovoltaic power station. Background technique [0002] With the gradual depletion of global fossil energy, photovoltaic power generation has developed rapidly in countries all over the world due to its clean, non-polluting, renewable, and huge reserves. In recent years, photovoltaic grid-connected simulation analysis has become a research hotspot in the field of power systems. The traditional simulation method establishes detailed simulation models for all grid-connected photovoltaic power generation units to achieve accurate simulation of the transient steady-state performance of photovoltaic grid-connected. However, with the continuous expansion of the scale of photovoltaic power plants, for a large number of centralized photovoltaic grid-connected units, the traditional modeling method not only c...

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 吴红斌张佳佳徐斌丁津津骆晨陈洪波
Owner HEFEI UNIV OF TECH
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