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Independent type photovoltaic power generation system and capacity optimization method

A photovoltaic power generation system, an independent technology, applied in photovoltaic power generation, photovoltaic power stations, light radiation generators, etc., can solve the problems of short battery life and high initial investment costs

Inactive Publication Date: 2012-04-04
JIANGSU UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the initial investment cost of batteries for energy storage is relatively high, and the life of batteries is short, and the replacement cost of batteries may be added during the use of photovoltaic power generation systems

Method used

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  • Independent type photovoltaic power generation system and capacity optimization method
  • Independent type photovoltaic power generation system and capacity optimization method
  • Independent type photovoltaic power generation system and capacity optimization method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] figure 1 It is the structure of photovoltaic power generation system. Each component in the photovoltaic power generation system is connected to the DC bus through a power converter, so as to realize system integration. stabilizes the voltage on the DC bus at V bus = About 220V, each component realizes mutual matching of output characteristics through a power converter. The photovoltaic array first obtains the maximum power output through the maximum power point tracking (MPPT) controller, and then sends the photovoltaic power to the DC bus through a DC / DC converter; divides the storage battery into three groups, implements group management, and centralizes The limited photovoltaic power is used to charge a specific group to avoid the battery being undercharged all the time. Each group is connected to the DC bus through a bidirectional DC / DC converter.

[0025] ...

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Abstract

The invention discloses an independent type photovoltaic power generation system and a capacity optimization method, belonging to the field of photovoltaic power generation. The independent type photovoltaic power generation system comprises a photovoltaic subsystem, a storage battery subsystem, a load and a control center. The capacity optimization method comprises the following steps of: taking the capacity of each element in the system as decision variable, and firstly determining the minimum of the number of photovoltaic arrays to obtain a group of system minimum configuration based on the restraint of meeting annual energy demand of the load under the condition of certain storage battery capacity; determining a sires of minimum system configuration according to the sequence of different storage battery storage capacities from low to high, and calculating the economic and technical performance indexes, wherein a user can select corresponding system capacity configuration according to demands per se. The capacity optimization method is suitable for capacity optimization of the photovoltaic power generation system using single or various energy storage devices.

Description

technical field [0001] The invention relates to an independent photovoltaic power generation system and a capacity optimization method. Background technique [0002] Solar energy is a ubiquitous, resource-rich and renewable energy without any environmental pollution. Solar photovoltaic power generation technology (Photovoltaic, PV) with photovoltaic cells as the core is an important application field for the development and utilization of solar energy. According to data from the International Energy Agency, installing solar photovoltaic power generation systems on 4% of the world's deserts is enough to meet global energy demand . [0003] At present, the investment cost of photovoltaic power generation system is high, and the operation of the system is affected by many external factors. Solar energy itself is greatly affected by seasons, weather and time, and the capacity of photovoltaic arrays cannot be designed in the same way as conventional power sources. Due to the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00H02J7/00H02S10/20H02S40/30
CPCY02E10/50Y02E70/30
Inventor 李春华曾庆军王玉龙章飞康
Owner JIANGSU UNIV OF SCI & TECH
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