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Configuration method for islanded microgrids with power springs to reduce energy storage capacity requirements

A technology of electric springs and energy storage capacity, which is applied in the direction of power network operating system integration, circuit devices, wind power generation, etc., and can solve problems such as inapplicable real-time energy balance

Active Publication Date: 2021-07-06
SHANGHAI JIAOTONG UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 islanded microgrids with power springs to reduce energy storage capacity requirements
  • Configuration method for islanded microgrids with power springs to reduce energy storage capacity requirements
  • Configuration method for islanded microgrids with power springs to reduce energy storage capacity requirements

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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

A configuration method for reducing the demand for energy storage capacity of an isolated island microgrid containing electric springs. The isolated island microgrid includes a conventional distributed power supply, an energy storage system, a diesel generator, an AC bus, an electric load, and an electric spring. Conventional distributed power includes wind power and photovoltaics. Electric loads can be divided into critical loads and non-critical loads according to the different demands of electrical appliances on power quality. The invention realizes the active interaction between the electric spring and the energy storage system, can effectively reduce the charging and discharging current and power of the energy storage system, improve the service life of the energy storage system, reduce the system's demand for energy storage capacity configuration, and improve the economy of the isolated island microgrid. It is equivalent to the electric spring providing a part of the virtual energy storage capacity for the microgrid.

Description

technical field [0001] The invention relates to a micro-grid energy storage system, and relates to a configuration method for an isolated island micro-grid containing electric springs to reduce the demand for energy storage capacity. 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 Patents(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 JIAOTONG UNIV
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