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DC microgrid group power optimization strategy based on PWM model prediction

A DC microgrid and optimization strategy technology, applied in the direction of DC power input conversion to DC power output, DC network circuit device, constraint-based CAD, etc. process, solve the effect of large amount of online calculation and minimize power loss

Active Publication Date: 2021-07-30
唐山冀东石油机械有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a DC microgrid group power optimization strategy based on PWM model prediction, which solves the problems of large amount of online calculation and unfixed frequency in traditional model predictive control

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  • DC microgrid group power optimization strategy based on PWM model prediction
  • DC microgrid group power optimization strategy based on PWM model prediction
  • DC microgrid group power optimization strategy based on PWM model prediction

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Embodiment Construction

[0076] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] The present invention is a DC micro-grid group power optimization strategy based on PWM model prediction. In order to reduce power loss and balance the group-level power imbalance caused by sub-network power mutation or bus failure, a strategy with minimum loss as the goal and self-adaptive allocation is proposed. The coefficient optimization strategy, through the correction of the predicted power of each subnet, realizes the coordination and optimization of the power of the DC microgrid group; in order to predict the power change of each subnet, a model predictive control based on pulse width modulation is proposed to predict the duty of the converter Compared with the carrier wave, a PWM control signal with a fixed frequency is obtained, which reduces the amount of online calculation. Applications such as figure 1 As shown, the ring...

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Abstract

The invention discloses a DC microgrid group power optimization strategy based on PWM model prediction. In order to reduce power loss and balance group-level power unbalance caused by factor network power sudden change or bus faults, an optimization strategy which takes minimum loss as a target and has a self-adaptive distribution coefficient is provided. The coordination and optimization of the power of the direct-current micro-grid group are realized by correcting the predicted power of each sub-grid; in order to predict the power change condition of each sub-network, prediction based on a PWM model is provided, the process of traversing all bus coupler converter states is reduced, and therefore, the online calculation amount is reduced.

Description

technical field [0001] The invention belongs to the technical field of DC micro-grid group energy coordination and optimization, and specifically relates to a DC micro-grid group power optimization strategy based on PWM model prediction. Background technique [0002] The DC microgrid meets the development needs of the smart grid and is an important part of the future grid. However, due to the inherent volatility and randomness of distributed power generation, it is impossible to fully realize the friendly connection with the AC grid. In order to improve the friendly connection between the DC micro-grid and the AC distribution network, the DC micro-grids with the same geographic location are interconnected, supplemented by energy storage to form a DC micro-grid group, and realize the interconnection and energy mutual aid of multiple DC micro-grids. The power supply efficiency and reliability of a single DC microgrid, but the access of multiple DC subnets increases the difficu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J1/10H02M3/155G06F30/20
CPCH02J1/00H02J1/10H02M3/155G06F30/20G06F2113/04G06F2111/04
Inventor 张辉张伟亮支娜曾成王韩伟杜明桥
Owner 唐山冀东石油机械有限责任公司
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