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A flexible interconnection system based on multi-microgrid and its energy storage capacity optimization method

A technology of interconnection system and energy storage capacity, which is applied in the field of energy storage, micro-grid technology in power system, and power electronics technology. It can solve the problems that energy storage devices cannot be configured, and the same or similar reports have not been found, so as to achieve space transfer. and complementary, smoothing the power fluctuation characteristics, and reducing the effect of the total amount of power fluctuations

Active Publication Date: 2020-12-25
JIANGSU BEICHEN HUBANG ELECTRIC POWER CO LTD
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Problems solved by technology

However, considering the cost of energy storage devices, in a microgrid with a high penetration rate of distributed photovoltaics, in order to ensure system economy, it is impossible to configure energy storage devices with corresponding capacity, and a new solution is urgently needed to stabilize the power fluctuation of the microgrid.
[0005] After searching, there is no report identical or similar to the subject of the present invention in the prior art

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  • A flexible interconnection system based on multi-microgrid and its energy storage capacity optimization method
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  • A flexible interconnection system based on multi-microgrid and its energy storage capacity optimization method

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[0028] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0029] Such as figure 1 As shown, a flexible interconnection system based on multiple microgrids, including: multiple microgrids (AC microgrid 1, AC microgrid 2, ... AC microgrid n), multiple voltages corresponding to the multiple microgrids Source converter devices (VSC1, VSC2, ... VSCn) and a common DC line, and multiple voltage source converter devices (VSC1, VSC2, ... VSCn) respectively connect corresponding multiple microgrids (AC microgrids) 1. AC microgrid 2, ... AC microgrid n) are interc...

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Abstract

The invention provides a flexible interconnection system based on multiple micro-grids and an energy storage capacity optimization method thereof. The system comprises multiple micro-grids, multiple voltage source converter devices corresponding to multiple micro-grids and a common DC line. Multiple voltage source converter devices interconnect the multiple corresponding micro-grids through the common DC line. Power flow optimal dispatching among multiple micro-grids is realized through flexible control of the VSC for aiming at the problem of high capacity of the energy storage device appliedto smooth the micro-grid power fluctuation, and the complementarity of different micro-grid power curves can be fully utilized so that the total power fluctuation of the micro-grids can be reduced andthe energy storage device capacity required for the micro-grids can be optimized.

Description

technical field [0001] The invention relates to the fields of microgrid technology, power electronics technology, and energy storage technology in power systems, and in particular, to a multi-microgrid-based flexible interconnection system and an energy storage capacity optimization method thereof. Background technique [0002] In recent years, more and more photovoltaic (Photovoltaic, PV) power generation systems have been connected to the distribution network in the form of distributed power, which has played a positive and effective role in energy conservation, emission reduction and the development of clean energy. However, since photovoltaic power generation is easily affected by factors such as weather, temperature, and light intensity, its output is random and intermittent, which brings more and more challenges to the safe and reliable operation of distribution networks. At the level of distribution network operation, short-term photovoltaic power fluctuations (second...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32H02J3/24
CPCH02J3/383H02J3/24H02J3/32Y02E10/56
Inventor 张建文周剑桥蔡旭
Owner JIANGSU BEICHEN HUBANG ELECTRIC POWER CO LTD
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