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A small-disturbance stability analysis method for wind-storage isolated grid system

An analysis method and technology of small disturbances, applied in the field of power systems, can solve the problems of less research on stability analysis of small disturbances

Active Publication Date: 2019-10-25
中电投东北新能源发展有限公司
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Problems solved by technology

At present, there are few researches at home and abroad on the small-disturbance stability analysis of large-capacity wind storage isolated grid systems

Method used

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  • A small-disturbance stability analysis method for wind-storage isolated grid system
  • A small-disturbance stability analysis method for wind-storage isolated grid system
  • A small-disturbance stability analysis method for wind-storage isolated grid system

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Embodiment Construction

[0052] The invention judges the small disturbance stability of the wind storage isolated grid system by establishing a mathematical model of the wind storage isolated grid system and adopting eigenvalue analysis. Such as Figure 1-8 shown, including the following steps.

[0053] Step 1: Determine the composition of the wind storage isolated grid system.

[0054] Step 2: According to the composition of the wind storage isolated grid system, establish the mathematical model of the wind storage isolated grid system.

[0055] Specifically include: Step 1: Establish a mathematical model of the permanent magnet wind generator. The second step: establish the mathematical model of the converter used for the energy conversion of the permanent magnet wind power generator. The third step: establish the mathematical model of the energy storage battery. Step 4: Establish the mathematical model of the inverter used for the energy conversion of the energy storage battery. Step 5: Establ...

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Abstract

The invention belongs to the field of electric power system technology and especially relates to a small signal stability analysis method for a wind storage isolated network system. The method improves the operation reliability of the wind storage isolated network system. The method comprises the steps: step1, determining constitution of the wind storage isolated network system, step2, establishing a mathematical model of the wind storage isolated network system according to the constitution of the wind storage isolated network system, step3, establishing a wind storage isolated network system small signal linearization matrix equation according to the established mathematical model of the wind storage isolated network system, step4, calculating a characteristic constant of the small signal linearization matrix equation, and step5, judging the small signal stability of the wind storage isolated network system according to Lyapunov linear system stability criterion.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a small-disturbance stability analysis method of a wind storage isolated grid system. Background technique [0002] Wind power is the main form of development and utilization of renewable energy. In recent years, the installed capacity of wind power has been increasing continuously, but the output of wind power has inherent defects such as spatial dispersion, temporal random fluctuation, intermittent, and low dispatchability. New energy such as wind power The process of centralized integration into the traditional grid has brought new problems to the safe and stable operation of the grid; in addition, due to the constraints of grid transmission capacity and stable operation requirements, the grid's ability to accept new energy is insufficient. The access to new energy sources such as wind power has changed the comprehensive load characteristics of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/386H02J2203/20Y02E10/76
Inventor 叶鹏李山许晓峰韩玥王亮于力王雪洁
Owner 中电投东北新能源发展有限公司
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