N−1 security in optimal power flow control applied to limited areas

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N−1 security in optimal power flow control applied to limited areas

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© The Institution of Engineering and Technology
Published

Blackouts in recent years have demonstrated that a reliable and secure power system is a key component of an efficient economy. Therefore control devices such as flexible AC transmission system devices (FACTS) are placed in the system and utilised to improve the security of the system. A method to determine appropriate settings for these devices is optimal power flow control. As the area of influence of a FACTS device is usually limited, it is sufficient to include only a reduced area in the optimisation problem. Here, such an optimal power flow problem is formulated where the considered area is defined using sensitivity analysis. To include N−1 security as an objective, a current injection method is applied, which facilitates the determination of the system state in the case of a line outage, without having to carry out a full-load flow simulation.

Inspec keywords: load flow control; power system security; power transmission reliability; flexible AC transmission systems

Other keywords: flexible AC transmission system devices; optimal power flow control; N-1 security; power system security; FACTS; power system reliability; sensitivity analysis

Subjects: Control of electric power systems; Power system protection; a.c. transmission; Reliability

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