System-control-requirement-oriented energy storage system optimum allocation method

A technology for energy storage systems and requirements, which is applied in the field of optimal configuration of energy storage systems for system regulation requirements, and can solve problems affecting the regulation and control performance of energy storage systems, limiting the configuration capacity of energy storage systems, and high investment costs of energy storage systems

Active Publication Date: 2015-04-22
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high investment cost of the energy storage system, the configuration capacity of the energy storage system is greatly limited, which affects the control performance of the energy storage system.

Method used

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  • System-control-requirement-oriented energy storage system optimum allocation method
  • System-control-requirement-oriented energy storage system optimum allocation method
  • System-control-requirement-oriented energy storage system optimum allocation method

Examples

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Embodiment Construction

[0056] The method for optimal configuration of an energy storage system oriented to system regulation and control requirements of the present invention will be further described below using the drawings and embodiments.

[0057] This example takes a provincial power grid as an example, and selects a wind farm group composed of 8 wind farms in the province as the research object, with a total installed capacity of 1193MW; figure 1 It is the wind power space that can be accepted by the power grid at each time period on a dispatch day, with figure 2 is the extreme value of the wind power operable domain and the actual output curve of the wind farm group. Each dispatch day is composed of 24 dispatch periods, and the sampling interval is 5 minutes. Because lithium-ion batteries have the advantages of high density, high efficiency, and long service life, lithium-ion batteries are used in energy storage systems. The operating life of the energy storage system is set to 15 years, it...

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Abstract

The invention relates to a system-control-requirement-oriented energy storage system optimum allocation method. The method is characterized by comprising the following steps: from the angle of power imbalance of wind power on the whole power grid, controlling the output power of a wind power plant group to not exceed the power balance target of the whole power grid, setting a discharge interval of the energy storage system in the residual power grid utilization space, performing optimal management on the energy of the energy storage system based on the SOC hierarchical control strategy, correcting the charge and discharge power of the energy storage system in real time, optimizing the working performance of the energy storage system, establishing a wind storage operating economy evaluation model, taking the maximum comprehensive income as a target, and determining the optimum discharge interval of the energy storage system. The capacity of the energy storage system is optimized, the service life of the energy storage system is prolonged, the grid-connected scale of new energy power is improved, and the acceptable wind-power space of the power grid is effectively utilized.

Description

technical field [0001] The invention relates to the technical field of wind power generation, and is an optimal configuration method of an energy storage system oriented to system regulation and control requirements. Background technique [0002] At present, my country is facing the dual pressure of energy depletion and environmental pollution, and the development and utilization of renewable energy has attracted widespread attention. The white paper "China's Energy Policy (2012)" proposes that my country should vigorously develop new energy and renewable energy, and achieve the goal of 15% of non-fossil energy consumption by 2020. Due to its environmental friendliness, wind power has developed rapidly around the world. As of 2013, the total installed capacity of wind power in the world has increased by 35GW, and the cumulative installed capacity has reached 318GW. However, with the expansion of wind power grid-connected scale, the randomness and intermittency of wind power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/386Y02E10/76
Inventor 李军徽严干贵葛延峰王月冯凯翔
Owner NORTHEAST DIANLI UNIVERSITY
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