Control optimization method for wind power-thermal power-stored power combined frequency modulation system

A technology of an energy storage system and a control method, which is applied in the field of control optimization of a wind power-thermal power-energy storage combined frequency modulation system

Active Publication Date: 2017-03-08
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a control optimization method for wind power-thermal power-energy storage combined frequency modulation system to solve the problem that traditional wind and thermal power dispatching cannot fundamentally solve the problem of wind power grid-connected frequency modulation

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  • Control optimization method for wind power-thermal power-stored power combined frequency modulation system

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[0043] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0044] Based on the analysis of the output characteristics of wind farms and the frequency modulation characteristics of thermal power units and energy storage, the present invention constructs a control optimization method for a combined frequency modulation system integrating wind power, thermal power and energy storage. The discrete Fourier transform method is used to analyze the actual output power data of wind farms, and based on the obtained wind farm output power variation law and the frequency modulation characteris...

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Abstract

The invention discloses a control optimization method for a wind power-thermal power-stored power combined frequency modulation system. The method comprises the steps of (S1) building a thermal power unit frequency modulation response model and a power storage system frequency modulation response model participating in frequency modulation, and analyzing and determining the frequency modulation characteristics of a frequency modulation thermal power unit and a power storage system in the system; (S2) carrying out spectrum analysis on output power of a wind power plant and controlling stored power-assisted thermal power participating in the frequency modulation; (S3) building a fuzzy PI control strategy of taking a control deviation ACE of two regional systems and the variation thereof as control inputs; and (S4) building a control strategy of the wind power-thermal power-stored power combined frequency modulation system on the basis of a control strategy of the stored power-assisted thermal power participating in the frequency modulation and the fuzzy PI control strategy. Meanwhile, the invention discloses the wind power-thermal power-stored power combined frequency modulation system, so that coordinated operation of the thermal power and the stored power can be ensured; an analysis basis and a calculation basis are provided for operation control of a wind power-thermal power-stored power system; and the control strategy for coordinated operation of the stored power and the thermal power unit is designed.

Description

technical field [0001] The invention relates to the field of power system frequency modulation control, in particular to a control optimization method for a combined frequency modulation system of wind power-thermal power-energy storage. Background technique [0002] The power system frequency is one of the three major indicators of power quality, reflecting the safe and stable operation of the power system. The stability of the frequency is closely related to the safety and efficiency of the majority of users' power equipment and the power generation and supply equipment itself. Frequency deviation is not conducive to the safe, reliable and economical operation of the power grid, and even damages the operating equipment in the power grid. In severe cases, it will cause system collapse. In recent years, the scale of wind power development in my country has continued to grow rapidly. After large-scale wind power is connected to the grid, it can provide clean energy to the gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32H02J3/381H02J3/386Y02E10/76Y02E70/30
Inventor 谢桦王文剑
Owner BEIJING JIAOTONG UNIV
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