Microgrid energy optimization method based hybrid energy storage dispatching under different time scales

A time-scale, hybrid energy storage technology, applied in AC network circuits, AC network load balancing, single-network parallel feeding arrangements, etc., can solve the problems of long time scale, difficult to track, poor accuracy, etc., and meet the scheduling requirements Effect

Inactive Publication Date: 2015-05-13
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

[0004] Aiming at the problems of poor day-ahead scheduling prediction accuracy, long time scale, and difficulty in tracking the actual operating state, the present invention proposes a micro-grid energy optimization method based on hybrid energy storage scheduling under different time scales, and r

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  • Microgrid energy optimization method based hybrid energy storage dispatching under different time scales
  • Microgrid energy optimization method based hybrid energy storage dispatching under different time scales

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Embodiment Construction

[0035] The present invention takes into account the disadvantages of poor day-ahead scheduling prediction accuracy, applies opportunity-constrained programming, takes the satisfaction of the backup demand under a certain confidence level as the reliability constraint, takes the minimum operating cost as the optimization goal, and utilizes the difference in time-of-use electricity prices to optimize and coordinate each micro-source and The output of the energy storage system; for the power fluctuations caused by uncertain factors such as fans, photovoltaics and loads in the microgrid, the first-order low-pass filtering algorithm is used to smooth the fluctuating power in real-time scheduling, and the filtered fluctuations are analyzed by the moving average filtering method. The power is reasonably distributed in the hybrid energy storage, so that the battery energy storage bears more low-frequency power fluctuations, and the super capacitor bears high-frequency fluctuations. Rea...

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Abstract

The invention relates to a microgrid energy optimization method based hybrid energy storage dispatching under different time scales. Microgrid optimized dispatching is divided into day-ahead dispatching and real-time dispatching according to different time scales; for the day-ahead dispatching, the operation plan of future 24 hours is provided one day in advance, the time granularity is 1 hour, the connecting line interaction power and the fuel cell (FC) output are optimized according to the difference between the electricity prices in the peak and valley periods, and a storage battery (SB) is dispatched to achieve low-storage high-output interest arbitrage; the real-time dispatching coordinates with the day-ahead dispatching, the microsource output is allocated according to the day-ahead plan, the time granularity is 1 minute, the power fluctuation in the microgrid is smoothened by use of a first-order low-pass filtering algorithm, the filtered fluctuating power is distributed reasonably between storage battery energy accumulation and a super capacitor by use of a moving average filtering algorithm and then reference is provided for the optimized dispatching of hybrid energy storage.

Description

technical field [0001] The invention relates to a micro-grid optimization scheduling technology, in particular to a micro-grid energy optimization method based on hybrid energy storage scheduling under different time scales. Background technique [0002] Micro-grid systems often use energy-based energy storage devices such as storage batteries (Storage Battery, SB) as the main energy storage equipment, but due to their shortcomings of long charge and discharge cycles, short life, and high cost, it is difficult to deal with high-frequency components of power fluctuations. Super Capacitor (SC) as a representative of power energy storage has the characteristics of high power density, long cycle life, fast response, etc., and has obvious complementary advantages with batteries. Therefore, connecting the Hybrid Energy Storage System (HESS) in the microgrid can solve the problem that the two kinds of energy storage are restricted by the energy density and response speed when used ...

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Application Information

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IPC IPC(8): H02J3/28H02J3/32H02J3/24G06Q10/04G06Q50/06
CPCH02J3/32H02J3/46H02J2203/20
Inventor 刘方杨秀刘舒张美霞时珊珊方陈柳劲松袁加妍朴红艳
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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