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Numerical physical hybrid simulation system of grid-connected photovoltaic power generating system

A digital-physical hybrid, grid-connected power generation technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as algorithms affecting the maximum power point tracking, and achieve the effect of improving the accuracy and reliability of the results

Inactive Publication Date: 2013-08-21
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] In a large-scale photovoltaic grid-connected system, when there are many photovoltaic panels, it is difficult to ensure that all panels have the best lighting conditions. Partial shadows will make the PV array's P-V curve show multi-peak characteristics, thereby affecting the maximum power point. tracking algorithm
In practice, energy losses in some PV systems due to partial shading can be as high as 70%

Method used

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0026] A digital-physical hybrid simulation system of a photovoltaic grid-connected power generation system, characterized in that the system includes an RTDS digital system, a DSP physical system, an analog output card (GTAO) and a digital input card (GTDI); the RTDS digital The DC voltage and DC current signals output by the photovoltaic panels in the system are transmitted to the DSP physical system through the analog output card, and a PWM pulse driving the chopper boost circuit in the DSP physical system is transmitted to the RTDS digital system through the digital input card.

[0027] Concrete operation process of the present invention is as follows:

[0028] The first step is to build a pure digital simulation model of the photovoltaic system in the RTDS system, such...

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Abstract

A numerical physical hybrid simulation system of a grid-connected photovoltaic power generating system comprises an RTDS digital system, a DSP physical system, an analog quantity output card and a digital quantity input card, wherein a direct-current voltage signal and a direct-current current signal which are output by a photovoltaic cell panel in the RTDS digital system are transmitted and input to the DSP physical system through the analog quantity output card, and a PWM pulse driving a boost chopper circuit in the DSP physical system is transmitted and input to the RTDS digital system through the digital quantity input card. The numerical physical hybrid simulation system can accurately track the global maximum power point in a local shadow, a standby circuit is needless, the system is suitable for various extreme light conditions, and result accuracy and reliability are improved.

Description

technical field [0001] The invention relates to a digital-physical hybrid simulation system of a photovoltaic grid-connected power generation system, which is a digital-physical hybrid real-time simulation system based on an RTDS (Real Time Digital Simulator) platform with a maximum power point tracking (MPPT) function under partial shadow. Background technique [0002] With the development of power systems, traditional digital simulation or physical experiment simulation has been difficult to describe some new problems faced by power systems, especially with the rise of high-power power electronic components, digital-physical hybrid simulation has become more and more important. Digital-analog hybrid simulation can combine the advantages of digital simulation and physical experiments to solve many problems encountered in current power systems. Photovoltaic power generation is an important renewable energy, and the research on photovoltaic power generation grid-connected sy...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 冯琳李国杰陈侃
Owner SHANGHAI JIAO TONG UNIV
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