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Micro-grid system capable of controlling frequency automatically

A frequency control and micro-grid technology, applied in the field of micro-grid systems, can solve the problems of weak grid construction and low power grid active power regulation ability, and achieve the effects of extending service life, ensuring safety, and suppressing the impact of voltage and frequency.

Inactive Publication Date: 2015-07-01
CHENGDU DINGZHIHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When wind power is connected to the grid, especially for small grids that operate independently, the grid construction is relatively weak, and the grid’s active power adjustment capability is small, and the grid stability problems caused by wind power grid connection are more obvious

Method used

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  • Micro-grid system capable of controlling frequency automatically
  • Micro-grid system capable of controlling frequency automatically
  • Micro-grid system capable of controlling frequency automatically

Examples

Experimental program
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Effect test

Embodiment Construction

[0032] figure 1 It shows a microgrid 10 with an energy storage system capable of stabilizing power fluctuations according to the present invention. The microgrid 10 includes: a photovoltaic power generation device 12, an energy storage system 13, a wind power AC / DC bidirectional converter module 1 16 connected to and isolated from large grid 20 , DC bus, AC / DC bidirectional converter module 2 15 for connecting photovoltaic power generation equipment 12 and DC bus, load 17 and monitoring device 11 .

[0033] 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.

[0034] 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 power generation power of the photovoltaic power generation equipment 12;...

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Abstract

The invention provides a micro-grid system capable of controlling frequency automatically. By the micro-grid system, the generation power of a power generation assembly in a micro-grid and load change in the micro-grid can be predicted, frequency information and voltage information of a large grid can be tracked, a dispatching instruction of a large grid is acquired in real time, the capacity of batteries of a storage battery module is detected in real time, a suitable control strategy can be formulated and carried out, the frequency and the voltage of the large grid can be adjusted by the micro-grid according to requirements of the large grid, the safety performance of an energy storage system is improved as much as possible, and the service life of the energy storage system is prolonged as much as possible.

Description

Technical field [0001] The invention relates to a micro-grid system capable of automatically realizing frequency control. Background technique [0002] Micro-grid (Micro-Grid), also translated as micro-grid, is a new type of network structure. It is a system unit composed of a group of micro-power sources, loads, energy storage systems and control devices. It can realize an autonomous system of self-control, protection and management. , it can run in parallel with the external power grid or run in isolation. [0003] 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 is wind energy. Due to the intermittent and random fluctuations of wind energy, the power generated by wind turbines is intermittent and fluctuating. The connection of these fluctuating wind energy to the syst...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J3/08
CPCH02J3/08H02J3/32H02J3/386Y02E10/76Y02E70/30
Inventor 肖会
Owner CHENGDU DINGZHIHUI TECH
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