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Monitoring device of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner

A monitoring device and micro-grid technology, applied in circuit devices, wind power generation, photovoltaic power generation, etc., can solve problems such as unfavorable system voltage stability and difficult power grid operation

Active Publication Date: 2015-06-24
GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At the same time, since the wind turbine is an asynchronous machine, if it is not controlled, it needs to absorb a certain amount of reactive power while generating active power, and does not use the voltage stability of the system
When the wind power penetration rate is low, these effects are not obvious. With the increase of the wind power penetration rate, the impact of wind energy on the power system gradually increases. difficulty

Method used

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  • Monitoring device of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner
  • Monitoring device of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner
  • Monitoring device of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner

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Embodiment Construction

[0046] figure 1 It shows a wind-solar-storage integrated microgrid 10 of the present invention that can be connected to the grid. The microgrid 10 includes: wind power generation equipment 14, photovoltaic power generation equipment 12, energy storage system 13, SVG equipment 18, DC bus, AC / DC bidirectional converter module 1 16 for connecting and isolating the DC bus from the large power grid 20, AC / DC bidirectional converter module 2 15 for connecting photovoltaic power generation equipment 12 and the DC bus, and load 17 and monitoring in the microgrid 装置11。 Device 11.

[0047] See figure 1 The energy storage system 13 includes a battery module 131 and a bidirectional DC / DC converter 132 connected to the aforementioned DC bus.

[0048] The monitoring device 11 includes: a photovoltaic power generation equipment monitoring module 114 for real-time monitoring of the photovoltaic power generation equipment 12 in the battery energy storage system 10 and for predicting the power gene...

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Abstract

A monitoring device of a wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner has the advantages that the monitoring device can predict the power generation power of wind-photovoltaic power generation equipment in a micro-grid and the load change in the micro-grid, track grid connection point voltage information of large power grids, acquire large power grid scheduling instructions in real time, detect storage battery module battery capacity in real time, set energy accumulation system discharge intervals, perform optimized management on the energy of an energy accumulation system on the basis of an SOC hierarchical control strategy, correct the charging and discharging power of the energy accumulation system in real time, optimize the working performance of the energy accumulation system, make and implement most appropriate control strategies, guarantee that the micro-grid participates in large power grid voltage adjusting according to the requirements of the large power grids during grid connection, and guarantee voltage stability during grid-connected operation.

Description

Technical field [0001] The invention relates to a monitoring device of a wind-solar-storage integrated micro-grid that can be connected to the grid. Background technique [0002] Energy and environmental crises have become important issues affecting the sustainable development of mankind, and the use of clean and renewable energy is the fundamental way to solve this problem. With the maturity of renewable energy power generation technologies such as wind power generation, photovoltaic power generation, and wave power generation, more and more renewable energy microgrids are connected to the power grid in a distributed form to meet people's daily production and living electricity needs. [0003] The microgrid based on wind power and photovoltaic power generation, as a supplement to the ultra-high voltage, long-distance, and large-scale grid power supply mode, represents the new development direction of the power system. The driving force of wind turbines is wind energy. Due to the ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J13/00
CPCH02J3/382H02J3/386H02J3/383H02J3/28H02J13/00Y04S10/123Y02P80/14Y02E10/56Y02E10/76Y02E40/70
Inventor 许驰
Owner GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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