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Adaptive adjustment strategy of 10 kilovolt double-loop self-healing system based on dynamic topology identification

A technology of self-adaptive adjustment and dynamic topology, applied in emergency power supply arrangement, AC network with the same frequency from different sources, AC network circuit, etc., can solve the problem of self-healing system topology setting applicability without consideration To solve problems such as compatibility, to enhance the ability to cope with topology changes and extreme situations, optimize cooperation, and improve reliability

Pending Publication Date: 2021-10-22
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Problems solved by technology

However, the above-mentioned literature does not consider the applicability of the setting after the topology of the self-healing system changes and the action coordination of the self-switching of the self-healing system.

Method used

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  • Adaptive adjustment strategy of 10 kilovolt double-loop self-healing system based on dynamic topology identification
  • Adaptive adjustment strategy of 10 kilovolt double-loop self-healing system based on dynamic topology identification
  • Adaptive adjustment strategy of 10 kilovolt double-loop self-healing system based on dynamic topology identification

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Embodiment

[0095] 4.1 Case data

[0096] In order to verify the effectiveness of the dynamic topology identification method and adaptive adjustment strategy for a 10 kV double-loop self-healing system, this paper takes the actual 10 kV double-loop self-healing system of a power supply company in Shanghai as a case study. Self-healing system topology such as Image 6 As shown, the open loop point is set at the CB 669 switchyard. The data of each substation and switch station in the self-healing system are shown in Table 1.

[0097] Table 1 Data of each substation and switch station

[0098]

[0099]

[0100] 4.2 Setting adaptive adjustment case:

[0101] As shown in Table 1, the current four switching stations are only configured with one set of setting values. When the number of switching stations changes, it cannot play a good protective role. Since the rheological transformation ratio of each switching station is different, the setting value of the backup protection is conver...

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Abstract

The invention discloses a 10 kilovolt double-loop self-healing system self-adaptive adjustment strategy based on dynamic topology identification, and belongs to the field of control. Firstly, all intelligent terminals are numbered and uploaded to a host, global topology generation is achieved in the host, and an initial topological structure of the self-healing system is obtained; furthermore, when a newly added switching station exists in the system or the position state of the circuit breaker is changed due to a fault, the self-healing system performs topology updating in real time to generate a new dynamic topology structure, and redefines the stage number of each switching station in the system; and finally, aiming at the change of the stage number of the switching stations, the backup protection setting value of each switching station and the segmented backup power automatic switching action time are adjusted according to an adaptive adjustment strategy to form a new protection strategy so as to adapt to the current topological structure. Therefore, effective protection and reasonable self-healing of the 10-kilovolt double-loop network in the flexible change process of the topological structure are realized. The method is suitable for the field of self-healing operation and self-adaptive operation management of a 10-kilovolt double-loop network power supply system.

Description

technical field [0001] The invention belongs to the field of operation control of a power supply system, in particular to an adaptive adjustment method for a 10 kV double-loop self-healing system. Background technique [0002] With the improvement of the level of social and economic development, people have higher and higher requirements for the reliability of power supply, and higher and higher requirements for the ability to quickly restore power supply when the power grid fails. [0003] The traditional 10 kV distribution network usually adopts a single power supply radial structure, even if the feeder automation and other means are used to restore power supply in a short time, it is still limited. Therefore, it is very urgent to study a distribution network topology with self-healing ability. [0004] Distribution network self-healing should be able to realize fault location, fault isolation and fast load transfer of non-fault segments. [0005] In recent years, many s...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/06H02J9/06H02H7/26
CPCH02J3/00H02J3/06H02J9/06H02J9/062H02H7/26H02J2203/10H02J2203/20
Inventor 夏澍徐迅陈春琴郑熠施昱青沈磊张鑫龚瑾
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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