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Multi-time scale coordinated control method for independent microgrid with hybrid energy storage

A multi-time scale, coordinated control technology, applied in AC networks, electrical components, circuit devices, etc. with energy trade/energy transmission authority, and can solve problems such as limited applicability

Inactive Publication Date: 2019-01-04
SOUTH CHINA UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, none of the above papers included the hybrid energy storage system as an element of coordinated control, and its applicability is limited.

Method used

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  • Multi-time scale coordinated control method for independent microgrid with hybrid energy storage
  • Multi-time scale coordinated control method for independent microgrid with hybrid energy storage
  • Multi-time scale coordinated control method for independent microgrid with hybrid energy storage

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Embodiment Construction

[0080] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0081] Such as figure 1 As shown, the present invention discloses an improved multi-time-scale coordinated control method for an independent microgrid with hybrid energy storage, which controls the independent microgrid with hybrid energy Coordinated control of the microgrid; and the multi-time-scale coordinated control method includes a sequentially executed day-ahead planning decision model, an intraday rolling optimization model, a quasi-real-time coordinated control model, a real-time coordinated control model, and main power balance.

[0082] The day-ahead planning and decision-making model of the present invention comprises the following steps:

[0083] Step 1: The microgrid energy management system obtains the next day's electric...

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Abstract

The invention discloses an improved multi-time scale coordinated control method for independent microgrid containing hybrid energy storage, this method is based on the day-ahead planning decision model, The intra-day rolling optimization model based on model predictive control, the quasi-real-time coordinated control model based on comprehensive criteria and the real-time coordinated control modelare constructed. Firstly, the day-ahead planning decision-making model takes the operation economy as the optimization objective, the operation restriction of distributed generation and the safety and stability of the system as the constraint conditions. Then the controllable unit start-stop plan deviation and load switching plan deviation are introduced into the rolling optimization model as soft constraints, which allow to revise the unit start-stop plan and load switching plan before the day. Secondly, a comprehensive criterion is introduced into the quasi-real-time coordinated control todecide the priority of distributed generation. Finally, in the real-time coordinated control, the hybrid energy storage system adopts the improved first-order low-pass filter algorithm to compensate the second-order unbalanced power adaptively.

Description

technical field [0001] The invention relates to the technical field of coordinated control of micro-grids, in particular to a multi-time-scale coordinated control method for independent micro-grids with hybrid energy storage. Background technique [0002] A microgrid is a small power supply and consumption system that can basically achieve internal power balance, which is composed of distributed power generation, energy storage systems, power loads, monitoring, protection and automation devices, and can be connected to the distribution network through public connection points. It can operate as an "equivalent controllable load" that can flexibly handle energy, or independently provide power for loads in the microgrid without the distribution network. For special occasions where the distribution network cannot be reached in remote areas, islands, etc., the microgrid can only operate independently. At present, energy storage devices such as batteries are usually used as the m...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/46H02J3/28H02J3/24
CPCH02J3/008H02J3/24H02J3/28H02J3/46H02J2203/20
Inventor 陈敬峰李可杨苹彭嘉俊卢东亮
Owner SOUTH CHINA UNIV OF TECH
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