Shared photovoltaic conversion system and maximum power point tracking method

A conversion system, sharing technology, applied to a single AC network with different frequencies, parallel operation of DC power supplies, electrical components, etc., can solve the problem of low load power supply efficiency, save power conversion links, and improve system energy efficiency.

Pending Publication Date: 2020-06-26
南京安贝旭电力科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a shared photovoltaic conversion system and a maximum power point tracking me

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  • Shared photovoltaic conversion system and maximum power point tracking method
  • Shared photovoltaic conversion system and maximum power point tracking method
  • Shared photovoltaic conversion system and maximum power point tracking method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0030] Such as figure 2 As shown, the shared photovoltaic conversion system includes an interface converter, a DC bus and several photovoltaic direct-feed home power supply systems; The DC bus is connected through the corresponding converter, the DC side of the interface converter is parallel connected with a DC capacitor, the DC side of the interface converter is connected to the DC bus, and the AC side of the interface converter is externally connected to the AC power grid.

[0031] Variable-frequency loads such as air conditioners, refrigerators, and washing machines are connected to the DC bus through DC / AC converters, and other types of loads such as lighting, computers, and televisions a...

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Abstract

The invention discloses a shared photovoltaic conversion system, and the system comprises an interface converter, a direct current bus and a plurality of photovoltaic direct-fed household power supplysystems; each photovoltaic direct-fed household power supply system comprises household photovoltaic part and a plurality of loads; the household photovoltaic parts are fed into a direct-current bus,and the loads are connected into the direct-current bus through corresponding converters; the direct-current sides of the interface converters are connected with the direct-current bus, and the alternating-current sides of the interface converters are externally connected with an alternating-current power grid. Meanwhile, the invention discloses a corresponding maximum power point tracking method. Only one converter is arranged between the photovoltaic and the load, so two stages of AC/DC and DC/DC power conversion links are effectively saved, and the energy efficiency of the system is greatly improved.

Description

technical field [0001] The invention relates to a shared photovoltaic conversion system and a maximum power point tracking method, belonging to the field of photovoltaic grid connection. Background technique [0002] figure 1 It is a traditional distributed photovoltaic access form, and photovoltaics are connected to the grid through DC / DC and DC / AC converters. Table 1 shows common residential loads, mainly including: 1. Frequency conversion loads: connected to the power grid through AC / DC / AC; 2. Power electronics loads and motor loads, such as TV sets, lighting, computers, and electric fans etc.), connected to the power grid through DC / AC and power frequency step-up transformers; 3. Resistance heating loads, such as electric kettles, are connected to the power grid through power frequency step-up transformers. [0003] Table 1 Comparison of residents' load access methods [0004] [0005] Household photovoltaic power supply to residential loads requires multi-stage po...

Claims

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Application Information

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IPC IPC(8): H02J1/10H02J3/38H02J3/02H02J4/00
CPCH02J1/10H02J3/02H02J4/00Y02B10/10
Inventor 葛雪峰王伟琦田昊李运帷
Owner 南京安贝旭电力科技有限公司
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