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A Reliability Assessment Method for Active Distribution Network Based on Switch Boundary Partitioning

A distribution network and reliability technology, which is applied in the field of reliability evaluation of active distribution network based on switch boundary partition, can solve problems such as complex action logic of protection devices, promote rational development, reduce the amount of analysis, and improve calculation accuracy Effect

Active Publication Date: 2017-12-12
STATE GRID CORP OF CHINA +3
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Problems solved by technology

In a power distribution system containing multiple distributed power sources, in order to form an active island, the action logic of the protection device will become very complicated

Method used

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  • A Reliability Assessment Method for Active Distribution Network Based on Switch Boundary Partitioning
  • A Reliability Assessment Method for Active Distribution Network Based on Switch Boundary Partitioning
  • A Reliability Assessment Method for Active Distribution Network Based on Switch Boundary Partitioning

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Embodiment Construction

[0068] A method for evaluating the reliability of an active power distribution network based on switch boundary partitioning according to the present invention will be described in detail below in conjunction with embodiments and drawings.

[0069] A method for evaluating the reliability of an active distribution network based on switch boundary partitions of the present invention comprises the following steps:

[0070] 1) According to the installation position of the switch, the active distribution network is divided into 9 areas.

[0071] After the distributed power generation is connected to the power distribution system, the fault impact analysis process should not only consider the fault of the traditional non-power distribution network components but also consider the fault of the distributed power source. At the same time, due to the access of distributed power sources, the structure of the power grid has changed to a certain extent. When analyzing the impact of faults,...

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Abstract

The invention provides a reliability evaluation method for an active power distribution network based on switch boundary subarea division. The reliability evaluation method comprises dividing the area containing the active power distribution network into nine subareas according to the installation positions of switches; according to reliability calculating expressions corresponding to different fault subareas, calculating the duration of power interruption, which is caused by a fault point corresponding to a feeder line of a fault, of a load point, the calculation comprising: calculating the interruption fault rate and interruption duration of the fault point in areas without power supply of a distributed power source, and calculating the interruption fault rate and interruption duration of the fault point in areas with power supply of the distributed power source; and measuring system reliability through calculating annual fault interruption rate and annual average interruption time of the load point, specially, measuring system reliability by adopting a system average interruption frequency index SAIFI and a system average interruption duration index SAIDI. The method of the invention reduces analysis amount, can accurately evaluate reliability of the power distribution network containing a distributed power source and provides reliability evaluation basis for development of Chinese active power distribution networks in the future.

Description

technical field [0001] The invention relates to a method for evaluating the reliability of an active power distribution network. In particular, it relates to a method for evaluating the reliability of active distribution networks based on switch boundary partitions for urban distribution network planning work of public institutions. Background technique [0002] As the link between end users and power generation and transmission systems, power distribution system is an important link to ensure safe and reliable power supply for users. With the rapid popularization of distributed power access in power distribution system, distributed power has brought various influences to power distribution system with its own characteristics, and at the same time, it will also change the original theory of reliability evaluation of power distribution system. with method. Since users can obtain power from both traditional power sources and distributed power sources at the same time, the fa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/381H02J3/383H02J3/386H02J3/388H02J2203/20Y02E10/56Y02E10/76
Inventor 李琥刘洪谢珍建谈健吴强黄河王海潜归三荣韩俊乔黎伟赵宏大戚博硕
Owner STATE GRID CORP OF CHINA
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