Reclosing and emergency control integrated optimization method for power grid based on DSR (Dynamic Security Region)

A technology of emergency control and optimization method, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, electrical components, etc. The effect of increasing safety domain margin, reducing economic cost, and increasing action margin

Inactive Publication Date: 2015-05-20
TIANJIN UNIV
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Problems solved by technology

However, the current automatic reclosing switch in the power system cannot distinguish whether the fault is permanent or transient. If the line fault is transient, the reclosing is successful; Hazards in the event of a short circuit during normal operation

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  • Reclosing and emergency control integrated optimization method for power grid based on DSR (Dynamic Security Region)
  • Reclosing and emergency control integrated optimization method for power grid based on DSR (Dynamic Security Region)
  • Reclosing and emergency control integrated optimization method for power grid based on DSR (Dynamic Security Region)

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0028] 1. About the input and output parameters of this comprehensive optimization system

[0029] This comprehensive optimization system aims to make up for the defect that the original power system control and tuning system is only aimed at emergency control or reclosing and can not control actions uniformly, which leads to the excessive threat of secondary impact to the transient stability of the system in the case of permanent faults.

[0030] The system input parameters are divided into two parts: the offline calculation part and the online calculation part. The input parameters required for the offline calculation part are: system topology (nodes, line relationships, transformer distribution, line impedance admittance and other systems, line parameters), and short-circuit ...

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Abstract

The invention discloses a reclosing and emergency control integrated optimization method for a power grid based on a DSR (Dynamic Security Region). The reclosing and emergency control integrated optimization method comprises the following steps: analyzing a reclosing time domain of a system by adopting a method of the DSR; combining emergency control quantitative analysis and an optimal time emergency control strategy of the DSR; integrally optimizing the reclosing and the emergency control. The invention provides an optimal reclosing time scheme with the DSR as the reference when permanent faults occur; according to the method, the impact of unsuccessful reclosing on the system stability can be effectively relieved, and a safety limit of the system is improved.

Description

technical field [0001] The invention relates to the fields of electrical equipment and electrical engineering, in particular to a comprehensive optimization method for reclosing and emergency control under a power grid based on DSR. Background technique [0002] Automatic reclosing is a key technology in the development of power systems. After a long period of research and development, it has formed a variety of specialized branches. With the continuous deepening of modern power system research, the recloser has developed towards the direction of modularization, integration and intelligence. At present, the reclosing research at home and abroad is mainly divided into the following two parts: "adaptive reclosing" research based on fault type discrimination (transient fault and permanent fault) and optimal time reclosing research based on transient stability considerations . [0003] The purpose of automatic reclosing is to put the line back into operation after the transien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/06
Inventor 刘怀东王曦冉马林吴贺崔晓君
Owner TIANJIN UNIV
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