Intelligent power grid distributed self-supporting photovoltaic power supply system
A smart grid and power supply system technology, applied in photovoltaic power generation, battery circuit devices, current collectors, etc., can solve the problems of small scale and low application level, expand installed capacity, ensure safety and reliability, and improve penetration rate effect
Active Publication Date: 2015-07-15
SHANDONG SACRED SUN POWER SOURCES
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Problems solved by technology
[0004] However, the proportion of civilian solar cell products for export is relatively high, and the application level and scale of domestic residents' self-use photovoltaic power supply systems are low, and the photovoltaic power supply systems are only economically beneficial when used in areas without electricity; However, there are still disadvantages in power transmission and power storage
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[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] The embodiment of the invention discloses a smart grid distributed self-sufficient photovoltaic power supply system, which can accept the remote scheduling of the system by the public power grid, realize the power interaction between the system and the power grid, the peak-staggered power consumption of the load and the economical operation of the system, and improve the system performance. Self-generated and self-consumption rate, ...
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The invention discloses an intelligent power grid distributed self-supporting photovoltaic power supply system. The system comprises a central controller, a DC / DC (direct current to direct current) direct chopper circuit, a power dispensable circuit, a DC / AC (direct current to alternating current) bidirectional inverter circuit, an island detection circuit and an energy accumulator, wherein the central controller is used for collecting data in real time, and controlling the DC / DC direct current chopper circuit, the power dispensable circuit, the DC / AC bidirectional inverter circuit, the island detection circuit and the energy accumulator through analytic calculation, so that the seamless switching between synchronization network and off network can be realized, the synchronization mode operation when a public utility grid is normal can be guaranteed, the system can quickly perform the automatic off-line and off-network mode operation when power is down, the remote dispatching acceptability to a public power grid, the power interaction between the system and the power grid, the off-peak power consumption of load and economical operation of the system can be realized, the power supply quality can be improved, the safety and the reliability of loaded power consumption can be guaranteed, the spontaneous self-supply rate of the system can be improved, and the impact of intermittency and fluctuation of photovoltaic power output to the power grid can be reduced.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power supply, and more particularly, to a distributed self-sufficient photovoltaic power supply system of a smart grid. Background technique [0002] Energy is the foundation of economic and social development, and it is also the main factor affecting economic and social development. With the development of economy and society, people use more and more energy, especially fossil energy. The restriction of energy on economic and social development is becoming more and more prominent, and the impact on the natural environment on which survival depends is also increasing, and fossil energy will eventually be consumed. exhausted. Therefore, improving energy utilization efficiency, adjusting energy structure, developing and utilizing renewable energy will be an inevitable choice for energy development. [0003] At present, with the rapid progress of photovoltaic power generation technology, the r...
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IPC IPC(8): H02J3/38H02J7/35H02J13/00
CPCY02E10/563Y02E10/566Y02E10/56
Inventor 隋延波孙佑宣孔令成马强
Owner SHANDONG SACRED SUN POWER SOURCES