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Photovoltaic assembly power optimizer and photovoltaic power generation system therewith

A photovoltaic power generation system and power optimizer technology, applied in the field of power electronics, can solve the problems of not being able to maximize performance, not taking into account strings in maximum power tracking, not being able to search and locate, etc.

Inactive Publication Date: 2016-01-06
BEIJING DYNAMIC POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the process of realizing the design of the photovoltaic power generation system, the inventors found that there are at least the following problems in the prior art: in the prior art, the power station-type solution connects all series-connected photovoltaic modules in parallel first, and then performs MPPT maximum power tracking uniformly. Maximum power tracking cannot take into account all the strings, and cannot maximize performance; cannot monitor the power generation status of each component, and if some components are damaged, they cannot be searched and located

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Embodiment Construction

[0015] A photovoltaic module power optimizer provided by an embodiment of the present invention and a photovoltaic power generation system having the optimizer will be described in detail below with reference to the accompanying drawings.

[0016] Such as figure 1 As shown, the present invention provides a photovoltaic power generation system with a photovoltaic module power optimizer; the photovoltaic power generation system includes: a photovoltaic module power optimizer DC / DC and a combiner box.

[0017] The photovoltaic module power optimizer is used for photovoltaic module power optimization and maximum power tracking, and multiple power optimizers are connected in series as a group of strings;

[0018] The photovoltaic module power optimizer does not need to collect voltage and current at the same time to obtain the maximum power, only collects the output voltage, and uses the ramping method such as Figure 5 As shown, the maximum power output of the battery pack is sou...

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Abstract

The invention provides a photovoltaic assembly power optimizer and a photovoltaic power generation system therewith. The system comprises the photovoltaic assembly power optimizers and a combiner box. The photovoltaic assembly power optimizers are used for photovoltaic assembly power optimization and maximum power tracking, wherein a plurality of photovoltaic assembly power optimizers are connected in series to form a string. The combiner box is used for enabling the photovoltaic assembly power optimizers of at least two strings to be connected in parallel for combination, and enables the combination information and the state information of all optimizers to be transmitted to a controller or a remote monitor. The system not only can improve the output power under a shielding condition, also can monitor the working state of each assembly, and facilitates maintenance.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a photovoltaic component power optimizer and a photovoltaic power generation system with the optimizer. Background technique [0002] In a photovoltaic power generation system, the shadow problem will reduce the output efficiency of the array, and it is prone to hot spots and damage the cells. In order to avoid damage to the battery, in the current photovoltaic battery module, generally when several batteries are connected in series and the voltage reaches 12V, a diode is connected in parallel. After adding the diode, the damage of the battery can be avoided, but the problem of multi-peak and the reduction of the output efficiency of the array cannot be avoided. question. When one is blocked in series, all the batteries connected in parallel with the same diode will be bypassed, and the power of the whole string will be lost. At present, the photovoltaic inverter usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/30
CPCY02E10/50
Inventor 张文学
Owner BEIJING DYNAMIC POWER CO LTD
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