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A monitoring device for a wind-solar-storage integrated microgrid that can be connected to the grid

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 difficulty in power grid operation.

Active Publication Date: 2017-01-04
GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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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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  • A monitoring device for a wind-solar-storage integrated microgrid that can be connected to the grid
  • A monitoring device for a wind-solar-storage integrated microgrid that can be connected to the grid
  • A monitoring device for a wind-solar-storage integrated microgrid that can be connected to the grid

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Embodiment Construction

[0047] figure 1 It shows a wind-solar-storage integrated microgrid 10 of the present invention that can be operated in parallel with 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 with the large power grid 20, AC / DC bidirectional converter module 2 15 for connecting photovoltaic power generation equipment 12 and DC bus, load 17 and monitoring in the microgrid device 11.

[0048] see figure 1 , the energy storage system 13 includes a battery module 131 and a bidirectional DC / DC converter 132 connected to the above-mentioned DC bus.

[0049] The monitoring device 11 includes: a photovoltaic power generation equipment monitoring module 114, used for real-time monitoring of the photovoltaic power generation equipment 12 in the battery energy storage system 10, and predicting the...

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Abstract

A monitoring device for a wind-solar-storage integrated microgrid capable of grid-connected operation. The monitoring device can predict the power generation power of the wind-solar power generation equipment in the microgrid and the load change in the microgrid, and can track the voltage information of the grid-connected point of the large grid and obtain real-time Large power grid dispatching instructions, real-time detection of battery module battery capacity, setting of energy storage system discharge interval, based on SOC hierarchical control strategy, optimize energy storage system energy management, real-time correction of energy storage system charge and discharge power, optimize energy storage system Work performance, formulate and implement the most appropriate control strategy to ensure that the microgrid participates in the voltage regulation of the large grid according to the needs of the large grid when it is connected to the grid, and ensures the voltage stability during grid-connected operation.

Description

[0001] Technical field [0002] The invention relates to a monitoring device for a wind-solar-storage-integrated micro-grid capable of grid-connected operation. Background technique [0003] The energy and environmental crisis has become an important issue affecting the sustainable development of human beings, and the utilization of clean and renewable energy is the fundamental way to solve this problem. With the maturity of wind power generation, photovoltaic power generation, wave power generation and other renewable energy power generation technologies, more and more renewable energy microgrids are connected to the power grid in a distributed manner to meet people's daily production and living electricity needs. [0004] As a supplement to the ultra-high voltage, long-distance, and large-grid power supply mode, the micro-grid based on wind power and photovoltaic power generation represents a new development direction of the power system. The driving force of wind turbines ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J13/00
CPCH02J3/382H02J3/386H02J3/383H02J3/28H02J13/00Y04S10/123Y02P80/14Y02E10/56Y02E10/76Y02E40/70
Inventor 丁业豪杨程霍沛威马发轩麦琪钱庆堂叶柏林梁耀林
Owner GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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