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Independent microgrid frequency hierarchical robust control method based on coordination of BESS and DE

A robust control and micro-grid technology, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve problems such as poor frequency regulation response, net load power fluctuation, etc.

Inactive Publication Date: 2016-05-04
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, when the battery energy storage system and the diesel generator set deal with the system net load power fluctuation problem caused by the instantaneous change of wind power and photovoltaic output power in the microgrid system, there is still a problem of poor frequency regulation response.

Method used

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  • Independent microgrid frequency hierarchical robust control method based on coordination of BESS and DE
  • Independent microgrid frequency hierarchical robust control method based on coordination of BESS and DE
  • Independent microgrid frequency hierarchical robust control method based on coordination of BESS and DE

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing, the present invention will be further described:

[0049] In order to achieve the above purpose, the present invention provides a frequency layered robust control method for an independent microgrid based on the coordination of a battery energy storage system and a diesel generator set. The overall implementation method includes the following steps:

[0050] Step 1: Calculate the frequency deviation Δf and active power deviation ΔP of the independent microgrid system to satisfy the following relationship:

[0051] Δ f Δ P = G ( s ) = 1 s M + D

[0052] Among them, ΔP=P MG -P L , P MG is the total output power of the independent microgrid system (P MG...

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Abstract

The invention discloses an independent microgrid frequency hierarchical robust control method based on coordination of a BESS (Battery Energy Storage System, BESS) and a DE (Diesel Generator Energy, DE). The independent microgrid comprises two controllable power supplies for the BESS and the DE, and two uncontrollable power supplies for a wind power generation unit and a photovoltaic power generation system; the independent microgrid frequency hierarchical robust control method comprises the steps of (1) the BESS adopts H <infinity> control to replace the conventional droop control for realizing primary-level control for the system frequency; and (2) the DE speed regulation system adopts the H <infinity> control to replace the conventional PI control for realizing secondary-level control for the system frequency. According to the independent microgrid frequency hierarchical robust control method, the coordination and control for the two different controllable distributed power supplies for the BESS and the DE are realized; the frequency dynamic performance of the microgrid system is effectively improved; quick response and robustness of the system frequency are ensured; and the stability of the system frequency is improved.

Description

technical field [0001] The present invention relates to the micro-grid frequency control technology, and more specifically, relates to a frequency-layered robust control method for an independent micro-grid based on the coordination of a battery energy storage system and a diesel generator set. Background technique [0002] At present, the hybrid energy microgrid integrating various distributed power sources and energy storage systems has become a flexible, reliable and economical power supply method, which can effectively solve the power shortage problem in remote areas such as islands and mountainous areas. With the continuous advancement and development of distributed power generation technology, renewable energy distributed power sources such as wind power and solar photovoltaic power generation account for an increasing proportion in microgrids. However, their inherent intermittent output power characteristics are likely to cause microgrids The active power of the syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/32H02J3/48
CPCH02J3/24H02J3/32H02J3/381H02J3/48Y02E10/56Y02E10/76Y02E40/10Y02E70/30Y02P80/14
Inventor 马艺玮
Owner CHONGQING UNIV OF POSTS & TELECOMM
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