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Island microgrid optimization operation method based on tie line and energy storage life

A technology for optimizing operation and connecting lines, applied to AC network circuits, single-network parallel feeding arrangements, collectors, etc., can solve problems such as insufficient consideration of energy storage life loss, and achieve asset utilization optimization and energy storage life optimization , to avoid the effects of extreme situations

Inactive Publication Date: 2021-02-12
WENZHOU ELECTRIC POWER DESIGN +1
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  • Application Information

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Problems solved by technology

And when using energy storage to stabilize fluctuations, the life loss of energy storage is not fully considered

Method used

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  • Island microgrid optimization operation method based on tie line and energy storage life
  • Island microgrid optimization operation method based on tie line and energy storage life
  • Island microgrid optimization operation method based on tie line and energy storage life

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Embodiment Construction

[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Surface", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular part.

[0057] refer to Figure 1 to Figure 6 As shown, in order to achieve the above object, the present invention provides the following technical solutions: a method for optimizing the operation of the sea-island micro-grid according to the tie line and the energy storage life, the method includes:

[0058] S1: Establish a battery charge and discharge model, which is used to feed back the state of charge of the battery pack and the state of charge and discha...

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Abstract

The invention discloses an island microgrid optimization operation method based on a tie line and an energy storage life. The method is characterized in that the method comprises the steps of buildinga storage battery throughput life model, enabling the storage battery throughput life model to convert the state of charge of a battery pack and a feedback charging and discharging depth state into economic cost and carrying out the evaluation, establishing a tie line power evaluation index, introducing uncertain constraints of natural resources and loads by adopting a random opportunity constraint method, describing a probability part of an error by normal distribution, converting the uncertain constraints into certain constraints, and adding the certain constraints into the storage batterythroughput life model for solving, adopting a target membership function, converting a multi-target problem into a single target to be optimized and solved according to a maximum satisfaction index method, and conducting optimization by taking the economic cost of the island microgrid, the load rate of the tie line and the power variance of the tie line as optimization targets. The method can optimize theasset utilization rate and the energy storage life of the tie line, and an extreme condition under single-target optimization is avoided.

Description

technical field [0001] The present invention relates to the technical field of sea-island micro-grid optimization, more specifically, it relates to a sea-island micro-grid optimization operation method based on tie lines and energy storage life. Background technique [0002] In recent years, due to problems such as energy crisis, environmental pollution, and excessive carbon emissions, renewable energy power generation technology and energy storage technology have attracted people's attention. With the development and utilization of renewable energy, distributed generation (distributed generation, DG) has received extensive attention, and microgrid technology has also been fully developed. The island area is rich in wind energy and solar energy resources. China has a vast coastline and has many island micro-grid demonstration projects. For example, Nanji Island Power Grid underwent new energy transformation in 2014. The existing wind power generation system is 1,000kW, phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/32H02J3/38H02J7/00G06Q10/04G06Q50/06
CPCH02J3/008H02J3/32H02J3/381H02J7/0048G06Q10/04G06Q50/06H02J2203/20H02J2300/22H02J2300/28Y04S10/50Y02E40/70
Inventor 赵璞潘乐真林群戴瑞海郑圣郑思源段浩金东吴昌设张清周朱海立周婕
Owner WENZHOU ELECTRIC POWER DESIGN
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