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Active power distribution network fault recovering method including distributed power supply and micro power grid

A distributed power supply and active distribution network technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the lack of systematic consideration of fault recovery methods, lack of application of micro-grid power supply capabilities, and no consideration of active distribution network Issues such as management strategy island division, impact of failure recovery, etc.

Inactive Publication Date: 2018-10-26
STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

[0004] The existing fault recovery strategies mainly have the following three problems: (1) The influence of distribution network active management strategies on island division and fault recovery is not considered; (2) The application of microgrid power supply capacity assessment in fault recovery is lacking; ( 3) Lack of active distribution network fault recovery methods that systematically consider distributed power sources and microgrids

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  • Active power distribution network fault recovering method including distributed power supply and micro power grid
  • Active power distribution network fault recovering method including distributed power supply and micro power grid
  • Active power distribution network fault recovering method including distributed power supply and micro power grid

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] Such as figure 1 As shown, the active distribution network fault recovery method containing distributed power sources and microgrids described in the present invention includes the following steps:

[0034] Step a: Evaluate the external power supply capability of the microgrid: Evaluate the external power supply capability of the microgrid based on the risk quantity, determine the output of the microgrid to participate in island division and fault recovery, and use Monte Carlo simulation technology to calculate the external power supply capacity of the microgrid under a certain confidence level. power supply capability.

[0035] Step b: Form an island of feasible plan: analyze and process all distributed power sources and microgrids in the active distribution network before a fault occurs, form an island of feasible plan, and adopt a check period contract for the se...

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Abstract

The invention relates to an active power distribution network fault recovering method including a distributed power supply and micro power grid and belongs to the technical field of informatization and automation of electric power systems. The method comprises following steps of a, establishing external power supply ability of the micro power grid; b, forming a feasible plan island; c, carrying out fault diagnosis, determining whether there is a distributed power supply or a micro power grid in a fault feed line, if yes, entering step d, and if not, entering step e; d, disconnecting a switch required for formation of the distributed power supply and the micro power grid; e, carrying out fault positioning and isolation; f, carrying out network reconstruction on the active power distributionnetwork; and g, carrying out fault recovering: carrying out operation of the same term on all islands, carrying out grid connection again and then recovering to an operation mode before the fault. According to the invention, based on the island division strategy and network reconstruction strategy of the active power distribution network, effects on fault recovery imposed by active management measures and the distributed power supply / micro power grid are considered; and loss of power failures caused by faults of the power distribution network is effectively reduced.

Description

technical field [0001] The invention relates to an active distribution network fault recovery method including a distributed power supply and a micro-grid, and belongs to the technical field of power system informatization and automation. Background technique [0002] At present, as far as the world is concerned, countries with higher energy utilization efficiency and better environmental protection are more enthusiastic about developing distributed power supply and micro-grid technology. At the same time, developed countries have been exploring the power supply mode and fault recovery mode combining large power grid system and distributed power generation system to improve the reliability of power supply of the system. In the literature "Impact of intentional islanding of distributed generation on electricity market prices", H.H.Zeineldin, K.Bhattacharya et al. studied the distribution network fault recovery steps including DG on the basis of traditional algorithms, but its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J3/001
Inventor 张宏伟王华磊陈磊赵媛媛陈龙龙段波盖午阳
Owner STATE GRID SHANDONG ELECTRIC POWER
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