A microgrid expansion planning method with mobile energy storage
A mobile energy storage and micro-grid technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve the problems of resource waste in micro-grid expansion planning, reduce expansion planning costs, alleviate energy stagnation, reduce The effect of capacity
Active Publication Date: 2021-01-26
SOUTHEAST UNIV +4
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[0005] Purpose of the invention: The present invention provides a microgrid expansion planning method with mobile energy storage, which solves the problem of waste of microgrid expansion planning resources caused by short-term large-scale DC load growth in the microgrid, and can improve the economy of microgrid expansion planning
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[0064] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0065] Such as figure 1 As shown, a microgrid expansion planning method with mobile energy storage described in the present invention includes the following steps:
[0066] 1. According to the scenario that the short-term increasing DC load can be cut off, the pre-established grid-connected AC microgrid topology model is extended to a grid-connected AC-DC hybrid microgrid topology model with mobile energy storage.
[0067] The pre-established grid-connected AC microgrid topology model structure is as follows: figure 2 As shown, including: AC bus, photovoltaic cells, wind generators, fixed energy storage, AC loads, DC loads, converters, and photovoltaic cells, wind generators and AC loads are connected to the AC bus, the fixed energy storage The DC load is connected to the AC busbar through the converter, and the AC busbar is connected to the AC grid throug...
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The invention discloses a microgrid extension planning method with mobile energy storage. First, the pre-established grid-connected AC microgrid topology model is extended to a grid-connected AC-DC hybrid microgrid topology model with mobile energy storage; secondly , to establish optimization objectives, optimization constraints under normal conditions, and dispatching strategies for mobile energy storage within the decommissioning time of the AC / DC hybrid microgrid system due to DC / AC converter faults, establish optimization constraints under fault conditions, and establish a grid-connected system with mobile energy storage Finally, the model is solved according to the optimization objective and optimization constraints, and the optimal configuration results of mobile energy storage capacity in grid-connected AC-DC hybrid microgrid with mobile energy storage are obtained. The invention can solve the problem of wasting resources in microgrid expansion planning, alleviate the problem of non-circulation of energy on both sides during decoupling operation of the AC and DC sides, reduce the cost of expansion planning of the microgrid, and improve the economy of the microgrid system.
Description
technical field [0001] The invention belongs to the technical field of micro-grid planning, and in particular relates to a micro-grid expansion planning method including mobile energy storage. Background technique [0002] Microgrid is a small power system, which has complete power generation, transmission and distribution functions, can realize local power balance and energy optimization, and has two operation modes: grid-connected operation and island operation. In order to develop the concept of low-carbon and clean energy, equipment such as photovoltaics, wind power and energy storage should be reasonably connected to the microgrid, and its capacity should be reasonably planned. [0003] At present, most of the existing planning schemes only consider the current load, and seldom consider the sudden increase of short-term load, such as the large increase in temporary load during the game. However, because such loads can be removed after a short period of time, re-plannin...
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IPC IPC(8): H02J3/28H02J3/38
Inventor 吴在军王沐凡于德明刘海军杨士惠张子健韦凌霄刘庆时
Owner SOUTHEAST UNIV