Configuration method for reducing demand for energy storage capacity by island microgrid with power spring

A technology of power spring and energy storage capacity, which is applied in power network operating system integration, circuit devices, photovoltaic power generation, etc., can solve problems such as inapplicability of real-time energy balance, etc., and achieve the requirements of improving lifespan, reducing capacity, and reducing charging and discharging current. Effect

Active Publication Date: 2018-10-23
SHANGHAI JIAO TONG UNIV +2
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  • Abstract
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Problems solved by technology

However, most of these methods are suitable for small time interval load demand management, not for real-time energy balance

Method used

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  • Configuration method for reducing demand for energy storage capacity by island microgrid with power spring
  • Configuration method for reducing demand for energy storage capacity by island microgrid with power spring
  • Configuration method for reducing demand for energy storage capacity by island microgrid with power spring

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Embodiment Construction

[0051] The technical solutions of the present invention will be further described below in conjunction with the examples and accompanying drawings, but the protection scope of the present invention should not be limited thereto. For example, in this embodiment, the energy storage system of the island microgrid is used as the specific implementation object of the control strategy of the present invention, but this should not limit the scope of application of the present invention.

[0052] The invention is based on the active adjustment ability of the electric spring to the power consumption of non-critical loads, and realizes the large charging and discharging of the intelligent load mitigation energy storage system through a two-layer energy optimization algorithm, reduces the charging and discharging power, and can effectively reduce the charging and discharging of the energy storage system Current and power, improve the life of the energy storage system; reduce the system's ...

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Abstract

The invention relates to a configuration method for reducing the demand for energy storage capacity by an island microgrid with a power spring. The island microgrid comprises conventional distributedpower sources, an energy storage system, a diesel generator, an alternating-current bus, electric loads, and a power spring. The conventional distributed power sources include wind power and photovoltaic power sources. The electric loads are classified into key loads and non-key loads based on different demands of the electric energy quality by electrical devices. According to the invention, positive interaction between the power spring and the energy storage system is realized, the charging and discharging current and power of the energy storage system are reduced effectively, and the servicelife of the energy storage system is prolonged; the demand of the energy storage capacity configuration by the system is reduced; and the economy of the island microgrid is improved. Therefore, one part of virtual energy storage capacity is provided for the microgrid by the power spring equivalently.

Description

technical field [0001] The invention relates to a micro-grid energy storage system, and relates to a configuration method for reducing energy storage capacity requirements of an isolated island micro-grid containing electric springs. Background technique [0002] In the traditional power system operation mode, the power generation is determined by the load demand. As the penetration rate of distributed renewable energy in the power grid continues to increase, the output of wind power and photovoltaic new energy is random and volatile, and it is difficult to accurately predict the power generation in real time. In order to achieve real-time power balance between load demand and power generation , which brings greater pressure to frequency modulation and voltage regulation, so that voltage fluctuations and frequency flicker are prone to occur. Large power grids have a certain self-healing ability to voltage fluctuations, while small island microgrids have poor adjustment capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/14
CPCH02J3/14H02J3/32H02J2203/20Y02B70/30Y02B70/3225Y02E10/56Y02E10/76Y02E70/30Y04S20/222Y04S20/242
Inventor 汪可友赵志宇李国杰江秀臣江剑峰陈金涛甄昊涵
Owner SHANGHAI JIAO TONG UNIV
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