Photovoltaic grid-connected inverter with stored energy management and load-power-based output functions

A technology of load power and inverter, which is applied in the field of electricity, can solve problems such as the impact of the power grid, and achieve the effects of avoiding impact, improving power utilization efficiency, and safe and reliable power supply

Active Publication Date: 2012-11-07
江苏辉伦太阳能科技有限公司
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Problems solved by technology

The grid-connected inverter is the most widely used at present, but its use is lim

Method used

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  • Photovoltaic grid-connected inverter with stored energy management and load-power-based output functions
  • Photovoltaic grid-connected inverter with stored energy management and load-power-based output functions
  • Photovoltaic grid-connected inverter with stored energy management and load-power-based output functions

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[0020] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] see Figure 4 , the photovoltaic grid-connected inverter with energy storage management and output according to load power of the present invention includes: solar array, maximum power tracking (MPPT) module, power control module, charge and discharge management module, energy storage device, inverter Grid-connected module, load monitoring module.

[0022] Among them, the function of the MPPT module is to: obtain the electric energy of the solar array through the MPPT algorithm, and make full use of the solar energy to the greatest extent; Grid-connected power; the function of the power control module is to manage the output power of the inverter grid-connected module and the electric energy flow direction and power from the charging and discharging management module to the energy storage device. And the state of the energy stora...

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Abstract

The invention discloses a photovoltaic grid-connected inverter with stored energy management and load-power-based output functions. The photovoltaic grid-connected inverter is characterized by comprising a solar array, a maximum power point tracking (MPPT) module, a power control module, a charging/discharging management module, an energy storage device, an inversion grid-connection module and a load monitoring module, wherein the MPPT module acquires the electric energy of the solar array through an MPPT algorithm; and the load monitoring module detects power parameters and the total current of load operation. The invention has the advantages that 1, according to the photovoltaic grid-connected inverter, the MPPT module is used for acquiring the generated energy of the solar array, and solar energy can be utilized to the greatest extent for power generation; 2, the load monitoring module is used for detecting the power parameters and the total current of the load operation, so impact on a power grid is avoided, and the energy storage device is managed; and 3, in a mode of connecting the grid-connected inverter and the power grid, the capacity of the energy storage device is effectively reduced, the utilization efficiency of the electric energy is improved, and load power is not limited by inverter power.

Description

technical field [0001] The invention relates to a grid-connected inverter, in particular to a photovoltaic grid-connected inverter with energy storage management and output according to load power; it belongs to the field of electricity. Background technique [0002] With the development of sustainable energy such as solar energy, the research and development in the field of grid-connected photovoltaic power generation has been driven. The existing photovoltaic inverters are divided into three types: grid-connected inverters, off-grid inverters and bidirectional inverters. , the corresponding structures are as figure 1 , 2 , 3 shown. Among them, the grid-connected inverter is to invert the direct current generated by photovoltaics into alternating current, and output all the electric energy to the grid. It is characterized by tracking the power of photovoltaic power generation, and all power generation can get the maximum output. The influence of photovoltaic power genera...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J9/00
CPCY02E10/563Y02B70/30Y02E10/56Y04S20/20
Inventor 张永文
Owner 江苏辉伦太阳能科技有限公司
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