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Photovoltaic power station mathematical modeling method for transient/dynamic analysis of power system

A technology for photovoltaic power plants and power systems, applied in photovoltaic power plants, photovoltaic modules, photovoltaic power generation, etc., can solve the problems of lack of credibility of power source model simulation results

Active Publication Date: 2010-03-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] In order to overcome the lack of credibility of the current power source model simulation results, the present invention provides a mathematical modeling method for photovoltaic power stations that can establish a mathematical model consistent with the model for temporary / dynamic analysis of the power system, which can be easily applied to Study and solve problems related to power systems considering the dynamic characteristics of photovoltaic grid-connected power plants

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  • Photovoltaic power station mathematical modeling method for transient/dynamic analysis of power system
  • Photovoltaic power station mathematical modeling method for transient/dynamic analysis of power system
  • Photovoltaic power station mathematical modeling method for transient/dynamic analysis of power system

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Embodiment Construction

[0026] Instructions attached figure 2 A schematic diagram of mathematical modeling of a photovoltaic power station for temporary / dynamic analysis of a power system is shown. Accordingly, a mathematical modeling method for a photovoltaic power station for temporary / dynamic analysis of a power system includes the following steps:

[0027] a) Express the load of the photovoltaic power station as a current source, and take the current I of the current source S , and take the equivalent resistance R and equivalent reactance X of the circuit from the voltage stabilizing capacitor 2 of the photovoltaic power station to the grid bus 7;

[0028] b) The DC-DC converter 3 and the DC-AC converter 4 are represented as a three-phase inverter AC side equivalent internal line potential vector with a photovoltaic power station and the three-phase inverter output active power P E The three-phase voltage source;

[0029] c) Using the static output characteristics of the photovoltaic array 1...

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Abstract

The invention discloses a photovoltaic power station mathematical modeling method for transient / dynamic analysis of a power system. In the method, modeling can be carried out by simplifying a way of aphotovoltaic power station mathematical mode for the transient / dynamic analysis of the power system, and the dynamic output characteristics can be replaced by the accurately expressed static output characteristics of the photovoltaic power station. The established mathematical model has high reliability in simulation calculation and is convenient for use.

Description

(1) Technical field [0001] The invention relates to a mathematical modeling method that can be used to study the influence analysis of the transient / dynamic characteristics of a power system after a photovoltaic power station is connected to the grid. The technical fields where this method can be applied include power system planning and operation, solar grid-connected power generation, and power electronic conversion (such as tributary-AC conversion, AC-branch conversion). (2) Background technology [0002] The traditional energy represented by fossil fuels is decreasing day by day, and the harm to the environment is becoming more and more prominent. At the same time, there are still 2 billion people in the world who do not have normal energy supply. Solar energy has become the focus of people's attention due to its unique advantages. More and more countries have begun to implement the "Sunshine Plan" to develop solar energy resources and seek new impetus for economic devel...

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Application Information

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IPC IPC(8): G06F17/50H02N6/00H02J3/38H02S10/00
CPCY02E10/563Y02B10/14Y02B10/10Y02E10/56
Inventor 赵义术
Owner STATE GRID CORP OF CHINA
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