Energy storage system capacity allocation method taking wind limiting characteristic and economy into consideration

A technology of energy storage system and capacity allocation, applied in the direction of AC network load balancing, etc., can solve problems such as hindering the large-scale utilization of wind power, endangering power grid security, and insufficient power grid regulation capacity.

Active Publication Date: 2015-11-18
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

[0002] In recent years, my country's wind power has shown a development trend of "large-scale wind power and high penetration". With the large-scale development of wind power, the existing grid regulation capacity has gradually become insufficient, and the contradiction between wind power and the grid has escalated sharply, resulting in large-scale wind abandonment and even endangering the grid. Safety, which seriously hinders the large-scale utilization of wind power

Method used

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  • Energy storage system capacity allocation method taking wind limiting characteristic and economy into consideration
  • Energy storage system capacity allocation method taking wind limiting characteristic and economy into consideration
  • Energy storage system capacity allocation method taking wind limiting characteristic and economy into consideration

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specific Embodiment

[0095] 1 Calculation conditions

[0096] This calculation example takes a provincial power grid wind farm group in Northeast China (total installed capacity 994.5MW) as an example to study the configuration capacity of its energy storage system. The wind power limited wind data (point / 5min) is taken from 2012.1.1-2012.12.31 annual data, other calculation conditions include:

[0097] 1) On-grid tariff of wind power C w = 600 yuan / (MW h), power grid peak and valley electricity price difference C d =300 yuan / (MW h), the emission cost C of the unit electric energy produced by the thermal power unit f =230 yuan / (MW·h);

[0098] 2) The energy storage system uses an all-vanadium flow energy storage battery. Literature [14] introduced that its cycle life is greater than 10,000 times. Considering that the deep charge and discharge of the energy storage system in some periods will shorten its operating life, the energy storage system can be charged and discharged every day. 1 time, ...

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Abstract

The invention relates to an energy storage system capacity allocation method taking wind limiting characteristic and economy into consideration. The method is characterized in that the wind limiting characteristic is analyzed based on the measured wind limiting power of a wind farm first, and on the basis, an energy storage system multi-scenario regulation control strategy is put forward and a corresponding scenario division principle is formulated; and then, an energy storage system capacity allocation method taking both wind limiting characteristic and economy into consideration is put forward by constructing an economic evaluation model taking into consideration the power benefit, environmental benefit, investment cost, maintenance fee and other factors of an energy storage system. Important reference is provided for capacity allocation of a concentrated charging and discharging large-scale energy storage system.

Description

technical field [0001] The invention belongs to the technical field of grid-connected operation of wind power generation, and relates to a method for configuring the capacity of an energy storage system in consideration of wind-limiting characteristics and economy. Background technique [0002] In recent years, my country's wind power has shown a development trend of "large-scale wind power and high penetration". With the large-scale development of wind power, the existing grid regulation capacity has gradually become insufficient, and the contradiction between wind power and the grid has escalated sharply, resulting in large-scale wind abandonment and even endangering the grid. Safety has seriously hindered the large-scale utilization of wind power. The use of energy storage system can realize the time-space translation of energy, so as to achieve the effect of reducing wind curtailment, improving the safety and economy of power grid and wind power operation. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28
Inventor 崔杨朱加明严干贵李焕奇杨海威徐蒙福
Owner NORTHEAST DIANLI UNIVERSITY
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