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Photovoltaic under-power output control method

A technology of output control and underpower, which is applied in the field of photovoltaic underpower output control, can solve the problems of large computing pressure on the processor, and achieve the effects of less calculation, convenient transplantation, and high efficiency

Active Publication Date: 2021-02-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the above method not only requires additional hardware expenditure, but also the complex model calculation will bring great computing pressure to the processor

Method used

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  • Photovoltaic under-power output control method
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  • Photovoltaic under-power output control method

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Embodiment Construction

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.

[0055] Such as figure 1As shown, a photovoltaic under-power output control method does not require temperature and irradiance sensors, and efficiently utilizes existing hardware resources, and can be portably transplanted into the current photovoltaic system. It is mainly divided into two parts: dp / dv control and constant voltage control. The specific steps are as follows:

[0056] S01, get the current output voltage v of the photovoltaic array pv and the current output current i pv ;

[0057] S02, calculating the value of dp / dv, using dp / dv control to determine the photovoltaic operating voltage range;

[0058] S03, add constant voltage control on the basis of dp / dv control, and determine t...

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Abstract

The invention discloses a photovoltaic under-power output control method. The method comprises the following steps: (1) acquiring a current output voltage vpv and a current output current ipv of a photovoltaic array; (2) calculating a value of dp / dv, and determining a photovoltaic working voltage range by adopting dp / dv control; and (3) adding constant voltage control on the basis of dp / dv control, and determining the photovoltaic power hot standby operation voltage according to the voltage range obtained by dp / dv control. By means of the method, equal-proportion hot standby of the output power of the photovoltaic power supply at different temperatures and irradiance can be achieved, temperature and irradiance sensors are not needed, existing hardware resources are efficiently utilized, and the photovoltaic power supply can be conveniently transplanted into a current photovoltaic system.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic networking, and in particular relates to a photovoltaic underpower output control method. Background technique [0002] In recent years, more and more photovoltaic systems have been connected to the power grid. With the increase of photovoltaic installed capacity, the inertia of the entire power system is also reduced, which in turn affects the frequency change rate and frequency deviation of the power grid, and may eventually lead to serious disasters. frequency stability issues. [0003] In order to solve the problem of frequency stability caused by intermittent photovoltaic output, power reserve control is gradually applied to photovoltaic systems, aiming to use the reserved power to participate in system frequency regulation. Generally, there are two ways to implement power reserve control: using energy storage equipment or photovoltaic power hot backup. [0004] The former generally us...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/381H02J3/241H02J2203/20H02J2300/24Y02E10/56
Inventor 项基倪佳华
Owner ZHEJIANG UNIV