DC micro-grid system based on solar-wave-storage complementary
A DC microgrid and power generation system technology, applied in photovoltaic power generation, AC network circuits, AC network load balancing, etc., can solve problems such as power loss and light wave uncertainty
Inactive Publication Date: 2019-08-16
GUANGDONG UNIV OF TECH
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[0004] In order to overcome the uncertainty of the power output of light waves combined with power generation caused by the uncontrollable weather of islands and sea waves, the invention introduces the power distribution of the energy storage system to adjust the system, improves the utilization rate of distributed energy, and improves the existing AC microgrid Due to the phenomenon of power loss caused by multiple converters, a DC microgrid system based on solar-wave-storage complementarity is proposed
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[0080] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent.
[0081] The present invention proposes a DC microgrid system based on light-wave-storage complementarity, in which the DC microgrid system is such as figure 1 shown, see figure 1 , including power generation unit system, load unit and DC bus connecting the power generation unit system and load unit, the power generation unit system includes wave energy generation system and its AC / DC converter, solar power generation system and its BOOST converter, energy storage system and Its energy distribution management system, bidirectional DC / DC converter, wherein the energy storage system is a hybrid energy storage, including supercapacitors and batteries, and the supercapacitors and batteries are connected in parallel...
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The invention discloses a DC micro-grid system based on solar-wave-storage complementary. The DC micro-grid system comprises a power generation unit system, a load unit and a DC bus connecting the power generation unit system to the load unit, wherein the power generation unit system comprises a wave power generation system and its AC / DC converter, a solar power generation system and its BOOST converter, an energy storage system and its energy distribution management system, and a bidirectional DC / DC converter; the energy storage system is a hybrid energy storage system including a supercapacitor and a battery; the load unit includes a DC load and its DC / DC converter, an AC load and its DC / AC converter, and a DC circuit breaker; the operating state of the energy storage system is adjustedaccording to a change in power flow between the power generation unit and the load unit in order to form three operating strategies of the micro-grid system, including an energy storage system charging operation strategy, an energy storage system discharging operation strategy, and an energy storage system limit charging operation strategy, thereby increasing the utilization rate of distributed energy and promoting the stable operation of the micro-grid system.
Description
technical field [0001] The present invention relates to the technical field of renewable energy power generation in a microgrid, and more specifically, to a DC microgrid system based on light-wave-storage complementarity. Background technique [0002] With the rapid development of my country's island construction, the island's demand for energy continues to increase. As an effective platform, the microgrid integrates distributed power generation and loads, making distributed power generation technology more flexible. attracted the attention of researchers at home and abroad. [0003] Studies have shown that wave energy, as a potential clean renewable energy, can meet 10% of the world's total electricity demand if it is developed reasonably, which is equivalent to the sum of the actual power generation of large hydropower stations in the world. In addition, the construction of solar power generation at sea can not only save the construction area, but also make full use of the...
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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/385H02J3/382H02J3/32Y02E70/30Y02E10/56
Inventor 谭绮仪杨俊华陈志炀田雨农蔡浩然
Owner GUANGDONG UNIV OF TECH