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Micro-grid energy storage capacity optimization configuration method

A capacity optimization configuration and optimization configuration technology, which is applied in the direction of circuit devices, AC network circuits, AC network load balancing, etc., can solve problems such as delay and high energy storage optimization capacity

Active Publication Date: 2016-08-24
NANJING INST OF TECH
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Problems solved by technology

The low-pass filtering method is used to stabilize the power fluctuation of renewable energy. On the basis of considering the variable life of energy storage equipment, the problem of capacity allocation of hybrid energy storage applied to photovoltaic power stations is studied from the perspective of economy. However, the low-pass The filter will generate a delay during the filtering process, resulting in a high energy storage optimization capacity

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Embodiment Construction

[0076] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0077] Taking a renewable energy power generation system composed of wind power generation and photovoltaic power generation, a hybrid energy storage system composed of batteries and supercapacitors, and a microgrid system with conventional loads as examples, the present invention provides a method for optimizing the configuration of microgrid energy storage capacity ,Such as figure 1 As shown, the microgrid energy storage capacity optimization configuration method includes the following steps:

[0078] (1) Combining the output power of the renewable energy power generation system and the power consumption of the load, the energy storage model of the microgrid system is established;

[0079] (2) Based on the energy power characteristics of the energy st...

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Abstract

The invention provided a micro-grid energy storage capacity optimization configuration method. Based on frequency spectrum analysis performed on micro-grid net load power, a micro-grid system power allocation policy coordinating operation of a storage battery and a super capacitor is provided; by analyzing the cost structure of an energy storage system, a micro-grid hybrid energy storage capacity optimization model by taking a comprehensive minimum cost of the energy storage system as a target function and simultaneously considering constraint conditions, such as energy storage charging and discharging power, residual electricity and the like, is established. Based on experiments, technique reasonability and economic practicability of the provided method are proved, and theoretical evidence and technical supports are provided for the micro-grid energy storage plan and design.

Description

technical field [0001] The invention belongs to the technical field of configuration optimization of a micro-grid energy storage system, and in particular relates to a method for optimizing configuration of a micro-grid energy storage capacity. Background technique [0002] Distributed renewable energy such as wind energy and solar energy will occupy a pivotal position in the future energy pattern where the energy crisis and environmental pollution are increasingly severe due to its advantages such as wide distribution of resources, large reserves, and no pollution. However, with the continuous improvement of the installed capacity and penetration rate of renewable energy power generation systems, its inherent randomness and volatility have also brought many negative effects on the stable operation of the power system. It is particularly important to equip the system with reasonable energy storage equipment that can ensure the flexibility of renewable energy utilization and ...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/00H02J3/32H02J2203/20
Inventor 杨志超陆文伟葛乐马寿虎陆文涛顾佳易王蒙
Owner NANJING INST OF TECH
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