Distributed hybrid new energy power generation and grid connection control device and method

Abstract

The invention discloses a distributed hybrid new energy power generation and grid connection control device which comprises a generating unit, a generating end feedback type control unit, an inverter, a pipeline filter, a breaker and a grid connection end circuit breaking control unit. The generating unit comprises a wind energy generating unit, a solar generating unit, a fuel battery generating unit, a gas turbine generating unit and a direct current confluence unit. The generating end feedback type control unit comprises a sensor module, a voltage transformer, a current transformer, a data sampling module, an A / D converter, an RAM and a microprocessor. The grid connection end circuit breaking control unit comprises a signal collecting module, a signal modulating module, a DSP processing unit and an upper computer. By the adoption of the device, the reliability of distributed new energy power generation and grid connection is greatly improved, the defects that large voltage fluctuation of independent wind energy generation and solar generation is overcome, and safety of a power distribution grid is improved.

Description

technical field [0001] The invention belongs to the field of new energy power generation and electrical technology, and relates to a distributed hybrid new energy power generation and grid-connected control device and method. Background technique [0002] With the rapid development of China's economy and science and technology, my country's new energy power generation has shown a rapid development trend, especially wind power and solar power generation technology are increasingly valued. In my country's total new energy grid-connected installed capacity, wind power grid-connected capacity ranks first. However, a single wind energy or a single solar energy cannot guarantee the continuous supply of electric energy in windless and rainy days and harsh weather conditions, so a single wind energy or a single solar power generation has the characteristics of intermittent, random, and poor dispatchability . In the case that the grid acceptance capacity cannot be adjusted by itsel...

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Problems solved by technology

However, a single wind energy or a single solar energy cannot guarantee the continuous supply of electric energy in windless and rainy days and harsh weather conditions, so a single wind energy or a single solar power generation has the characteristics of intermittent, random, and poor dispatchability

In the case that the grid acceptance capacity cannot be adjusted by itself, large-scale new energy power generation grid integration will cause a decline in power quality in the distribution network, affecting electrical equipment and threatening the lives of users. Therefore, in order to ensure the stability of the distribution network, It is necessary to ensure the stability of new energy power generation and the reliability of access to the grid

Although the currently researched wind-solar hybrid technology can reduce the fluctuation of the output voltage of wind and solar power generation to a certain extent, it requires the energy storage battery to be continuously charged and discharged to maintain it, and the long-term continuous charging and discharging of the battery will reduce the service life of the battery and further reduce the battery life. Bring certain risks to system stability

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