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Method of assessing reliability of micro-grid in isolated island operation state

A technology of operating status and reliability, applied in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2014-04-02
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a lack of a full-time and comprehensive evaluation method for the reliability of the microgrid in the prior art

Method used

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  • Method of assessing reliability of micro-grid in isolated island operation state
  • Method of assessing reliability of micro-grid in isolated island operation state
  • Method of assessing reliability of micro-grid in isolated island operation state

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Embodiment Construction

[0052] The specific implementation manner of the present invention will be described in further detail below according to the accompanying drawings.

[0053] Such as figure 1 Shown is an example structure diagram of a microgrid under the island operation mode. The present invention provides a method for evaluating the reliability of the microgrid under the island operation state, and its flow chart is as follows figure 2 shown by figure 2 It can be seen that the method includes:

[0054] Step 1. Obtain the topology of the microgrid, the failure rate and repair rate of each component of the system, the system load characteristics, and the configuration of distributed energy and energy storage devices, and obtain the full-time fan, photovoltaic and energy storage in the normal operating state of the microgrid. Battery output and real-time load value.

[0055] Step 2, judge whether the microgrid is running normally; if yes, according to the full-time fan, photovoltaic and ba...

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Abstract

The invention provides a method of assessing reliability of a micro-grid in the isolated island operation state. The method includes: 1, acquiring data information of the micro-grid; 2, judging whether or not the micro-grid runs normally; if yes, judging power balance and load reduction to obtain outage times and outage period of outage load, and executing the step 6; if not, determining running time TTFmin of an element running in a shortest time before failing, pushing a simulation clock to the moment of running time TTFmin, and executing the step 3; 3, determining fault time TTR of the element; 4, acquiring the outage times and outage time of the outage load in the period of from TTFmin to TTFmin+TTR; 5, judging whether nor not the time of the simulation clock meets duration required for assessment accuracy; if yes, determining the element running in the shortest time before failing, and executing the step 3; if not, executing the step 6; 6, calculating reliability indexes of the micro-grid. According to the assessing method, power fluctuation in distributed energy resources, variation characteristics in the load and restraints of an energy storage device are fully considered, and the micro-grid is assessed by full-time comparison.

Description

technical field [0001] The invention relates to the field of power grid reliability evaluation, in particular to a micro-grid reliability evaluation method in an isolated island operation state. Background technique [0002] Power system reliability refers to the ability of the power system to provide uninterrupted power to power users in accordance with acceptable quality standards and required quantities. In today's society where electricity is the main way of energy consumption, residents are increasingly dependent on electricity. In areas far away from the power grid, local direct power generation is the best choice, so the micro-grid operating in an isolated island becomes the power source most needed by people. [0003] The traditional power grid reliability assessment is to establish the operation-outage state model of each component of the system, analyze the consequences of component outage according to the configuration of the power grid, and then evaluate the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘海涛吴鸣苏剑郭力李洋季宇于辉李蕊
Owner STATE GRID CORP OF CHINA
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