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Method for optimal configuration of independent micro grid mixed energy storage capacity

A technology for energy storage capacity and optimal configuration, applied in energy storage, AC network load balancing, photovoltaic power generation, etc., can solve problems such as difficult to achieve power supply and demand balance, and achieve the effect of increasing utilization efficiency and saving investment costs

Inactive Publication Date: 2014-10-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0004] The present invention is aimed at the problem that it is difficult to balance the supply and demand of electricity in an independently operated microgrid, and proposes an optimization configuration method for the hybrid energy storage capacity of an independent microgrid, and optimizes the energy storage capacity for an independently operated wind-solar complementary microgrid Configuration, on the basis of comprehensive consideration of the load characteristics of the power generation unit and energy storage unit, the objective function with the lowest investment cost of the hybrid energy storage system is established, and the energy constraint and power constraint are proposed, and the calculation example is carried out with the particle swarm optimization algorithm solution, which proves the correctness of this capacity optimization configuration method

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  • Method for optimal configuration of independent micro grid mixed energy storage capacity
  • Method for optimal configuration of independent micro grid mixed energy storage capacity
  • Method for optimal configuration of independent micro grid mixed energy storage capacity

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Embodiment Construction

[0029] When the wind power generation units and photovoltaic units are not enough to supply the electricity required by the load, the energy storage system is responsible for supplying the insufficient power; when there is a surplus in power generation, the energy storage system absorbs the surplus power. The surplus and deficiency of microgrid power generation is the basis for determining the capacity of the energy storage system. Similarly, when the load fluctuates suddenly, the energy storage system also provides buffering impact power, so the impact power when the load fluctuates greatly and the power consumption during this period are also one of the key factors to determine the energy storage capacity. On the basis of comprehensive consideration of the load characteristics of the power generation unit and energy storage unit, the objective function with the lowest investment cost of the hybrid energy storage system is established, the energy constraint and power constrain...

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Abstract

The invention relates to a method for optimal configuration of independent micro grid mixed energy storage capacity. According to a mixed energy storage system composed of a storage battery and a supercapacitor, with one-time investment of the mixed energy storage system serving as an objective function, the capacity of the mixed energy storage system is comprehensively considered and determined from the aspects of the energy supply capability and the power supply capability of the energy storage system, a particle swarm optimization algorithm is adopted to solve a calculation example, and an optimal solution which is the least investment of the mixed energy storage system on the premise of meeting system reliability is output finally. The correctness of a mixed energy storage capacity optimization model is verified, and the method reduces investment cost of an energy storage device and improves utilization efficiency of renewable resources.

Description

technical field [0001] The invention relates to a micro-grid capacity configuration technology, in particular to a method for optimal configuration of independent micro-grid hybrid energy storage capacity. Background technique [0002] In a microgrid, the power generation of distributed power sources such as wind power and photovoltaics is restricted by weather conditions, which is unstable and uncontrollable. In addition, there is also a certain degree of randomness in the load, so it is very difficult in an independently operating microgrid. It is difficult to balance the supply and demand of electricity. By configuring a certain energy storage unit, the power supply reliability of the microgrid can be effectively improved and the energy supply and demand balance can be achieved. At present, the prices of various energy storage devices are relatively expensive. Therefore, when configuring the energy storage system, strive to achieve the best combination of distributed pow...

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Application Information

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IPC IPC(8): H02J3/32
CPCY02E10/56Y02E70/30
Inventor 彭道刚钟永张浩钱玉良李辉夏飞黄丽黄超
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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