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Superconducting magnetic energy storage-storage battery-based transient-stability control method of microgrid

A superconducting magnetic energy storage and transient stability technology, applied in the field of power system and automation, can solve the problems of difficulty in meeting the instantaneous power change power requirements of microgrids, limited power, slow response speed, etc. The effect of state stability, smooth switching, compensation voltage sag

Inactive Publication Date: 2018-08-31
WUHAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Although the input and output power of this device itself is limited and the response speed is slow, it is difficult to meet the power requirements caused by instantaneous power changes and sudden failures in the microgrid, and its shortcomings can be compensated by the superconducting magnetic energy storage device SEMS

Method used

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  • Superconducting magnetic energy storage-storage battery-based transient-stability control method of microgrid
  • Superconducting magnetic energy storage-storage battery-based transient-stability control method of microgrid
  • Superconducting magnetic energy storage-storage battery-based transient-stability control method of microgrid

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Embodiment Construction

[0040] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] figure 1 Shown is a microgrid system including a superconducting magnetic energy storage-battery hybrid energy storage device in an example application of the present invention. The selected microgrid contains two distributed generation (DG) units for photovoltaic power generation, PV1 and PV2, each DG unit is connected to the PCC, the common coupling point between the microgrid and the main grid via a DC / AC inverter ; There are 1 superconducting magnetic energy storage device SMES and 1 lead-acid battery, which are connected to the common coupling point PCC through a DC / DC converter and a DC / AC inverter respectively; there are 2 loads, respectively load 1 And load 2, and DG unit together form a simple microgrid system. S PCC For the circuit breaker.

[0042] Regarding the specific implementation of the superconducting magnetic...

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Abstract

The invention relates to a superconducting magnetic energy storage-storage battery-based transient-stability control method of a microgrid. The superconducting magnetic energy storage-storage battery-based transient-stability control method is characterized by comprising the steps of 1) installing a superconducting magnetic energy storage-storage battery hybrid energy storage device at a public coupling point of the microgrid and a main power grid by a DC / AC inverter and a DC / DC converter; 2) employing a superconducting magnetic energy storage (SMES)-storage battery coordination method duringinternal fault processing; 3) employing an SMES-storage battery coordination method during external fault processing; and 4) combining the SMES-storage battery coordination methods during internal fault processing and external fault processing to form an SMES-storage battery coordination control method during processing different faults. By combining the complementary technical characteristics ofSMES and storage battery energy storage, remarkable effects on aspects of reducing power fluctuation, reducing a fault current, compensating voltage sag, preventing frequency fluctuation and the likeunder different faults are achieved, and generally, the SMES-storage battery transient-stability control method has remarkable effect of improving transient stability of the microgrid.

Description

Technical field [0001] The invention belongs to the field of power systems and automation, and in particular relates to a microgrid transient stability control method based on superconducting magnetic energy storage-battery, combining the complementary technical characteristics of superconducting magnetic energy storage and battery energy storage to improve Transient stability of high-permeability microgrid under different faults. Background technique [0002] The Consortium for Electic Reliability Technology Solutions (CERTS) put forward the concept of microgrid in 2003, which is widely recognized internationally. The microgrid is composed of micropower sources, loads, energy storage devices, etc. The microgrid can supply electric energy and heat energy. The micropower sources and energy storage devices can be effectively controlled by power electronic components, and the system runs under certain control strategies. The microgrid can be connected to the main grid through the P...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/24H02J3/38
CPCH02J3/24H02J3/32H02J3/383H02J3/388Y02E10/56Y02E40/10Y02E40/60Y02E70/30
Inventor 陈磊李国城
Owner WUHAN UNIV
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