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Photovoltaic micro-grid interval optimization scheduling method with multi-time scales

A multi-time scale, interval optimization technology, applied in photovoltaic power generation, AC network circuits, AC network load balancing, etc., can solve problems such as scheduling deviation and microgrid power imbalance.

Active Publication Date: 2017-02-22
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology

The present invention solves the problem that the day-ahead scheduling deviates from the actual operation situation caused by the unbalanced micro-grid power, and has real-time scheduling that follows the day-ahead spinning standby plan, and adjusts the plan according to the real-time error situation, balances intermittent energy fluctuations, and ensures the economy of the system Advantages of running

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[0027] In the following, with reference to the drawings, through the description of the embodiments, the specific implementation of the present invention such as the shape and structure of the various components involved, the mutual position and connection relationship between the various parts, the function and working principle of each part, and the manufacturing process And the operation and use method, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present invention.

[0028] Such as figure 1 As shown, the grid-connected photovoltaic microgrid is optimized for multiple time scales. Among them, the photovoltaic system is integrated into the AC bus through a DC / AC inverter (ECS), and the maximum power tracking control strategy is adopted; the energy storage system passes the voltage Source-type bidirectional power converter (PCS for short) is co...

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Abstract

The invention discloses a photovoltaic micro-grid interval optimization scheduling method with multi-time scales, and belongs to the field of renewable energy source micro-grid techniques. The photovoltaic micro-grid interval optimization scheduling method comprises the following steps: by using an interval value description method, describing the intermittency of renewable energy and inaccuracy characteristics of load prediction; meanwhile, by adopting a dual-layer optimization strategy, providing active power instructions for operation of different micro-grid components within 24 hours of a former day and in real time (every 15 minutes); and because of a relatively large amount of indefinite factors in the operation process of a micro-grid and a limited rotation reserve capacity available inside a system, generally confirming positive and negative rotation reserve capacities purchased from a power distribution grid by the micro-grid according to a current scheduling plan, and coordinating operation of different components of the micro-grid. The photovoltaic micro-grid interval optimization scheduling method is capable of solving the problems that the current scheduling is deviated from actual operation situations and the like because of unbalanced micro-grid power, and has the advantages that real-time scheduling can be implemented to comply with the current rotation reserve plans, the plans can be adjusted according to real-time error situations, intermittent energy fluctuation can be balanced, and economic operation of the system can be ensured.

Description

Technical field [0001] The invention belongs to the technical field of renewable energy microgrids in the field of smart grids, relates to a photovoltaic microgrid interval scheduling direction, and specifically relates to a multi-time scale photovoltaic microgrid interval optimal scheduling method. Background technique [0002] As one of the main forms of smart grid development, photovoltaic microgrid has been developed rapidly in recent years. It is mainly composed of distributed power sources, energy storage systems, loads, and energy management systems (Energy management system, EMS), protection systems, and monitoring systems. It can operate independently as a whole or run in parallel with the large power grid. Thus, it can provide a powerful supplement and support for the large power grid, which is an important part of the smart grid. Because there are many uncertain factors in the operation of microgrid, and the spinning reserve capacity that can be provided within the sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/28
CPCH02J3/003H02J3/28H02J3/383H02J3/46Y02E10/56Y02E70/30
Inventor 陈其工禹威威高文根刘世林季乐乐徐伟凡胡咏洪家尧曹益飞王坤蒋曼梁巍
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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