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Time correlation and component runtime-based microgrid reliability calculation method

A technology of time correlation and calculation method, applied in calculation, complex mathematical operation, instrument, etc., can solve the problems of failure rate error, poor reliability index, not considering the running time of existing components, etc., and achieve comprehensive and accurate sampling. Effect

Active Publication Date: 2017-12-22
STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST +2
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Problems solved by technology

The more complex the structure of the microgrid, the more complex the reliability calculation process, the longer the calculation time, the greater the possibility that users will be affected by component failures, and the worse the reliability index may be
[0006]2. Component failure rate
[0011]1. The research has not yet involved the time correlation between new energy output and load. When simulating the system state at any time, the output of new energy power and the load have not been accurately compared. Load value one-to-one correspondence
[0012]2. The operating time of existing components is not considered in the reliability calculation, and the failure rate of the effective life of the components is always used. There is a certain error
[0013]3. It is difficult for the traditional sampling method to traverse all intervals when sampling the wind speed and there is a large error in this sampling method

Method used

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  • Time correlation and component runtime-based microgrid reliability calculation method
  • Time correlation and component runtime-based microgrid reliability calculation method
  • Time correlation and component runtime-based microgrid reliability calculation method

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Embodiment 1

[0140]Taking a microgrid in a southern city (119°33′19″E, 23°34′02″N) as an example, the present invention will be further described.

[0141] a. The microgrid is composed of wind turbines, photovoltaic panels, energy storage equipment, etc., including two feeders, ten circuit breakers, eight distribution transformers, and eight load points. The load types include residential electricity and commercial electricity. Electricity and industrial electricity, the proportion of various types of loads is stable, and the proportion of each load point to the total load is stable;

[0142] b. The microgrid includes 300 fans, 5,000 photovoltaic units, 10 diesel engines, 1.5×105 lithium batteries, and 60 supercapacitors;

[0143] c. Fan rated power 30kW, rated wind speed 12m / s, cut-in wind speed 3m / s, cut-out wind speed 24m / s, photovoltaic unit rated power 0.2kW, standard light intensity 1kW / m2, standard working temperature 25°C, power temperature coefficient - 0.0045, diesel engine rate...

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Abstract

The invention discloses a time correlation and component runtime-based microgrid reliability calculation method. The method comprises the steps of obtaining an accurate fault rate of a component by reference to a bathtub curve of the component according to component runtime of a microgrid, and by establishing a moment tag and a season tag, comprehensively considering randomness and fluctuation of a new energy output; and extracting a wind speed through an improved Latin hypercube sampling method, determining illumination intensity through the moment and season tags, calculating out a new energy power supply output, and performing reliability calculation based on a state duration sampling method. The method is suitable to calculate the reliability of the microgrid containing a new energy power supply; a new energy power supply output and a load at any moment can be associated through the time tag; and the fault rate of the component in a real running condition is considered, so that the reliability of the microgrid containing the new energy power supply can be calculated more accurately and more really.

Description

technical field [0001] The invention relates to the research field of power system reliability calculation, in particular to a method for calculating the reliability of a microgrid based on time correlation and component running time. Background technique [0002] The power industry is the foundation of national economic development, and power grid security is an important part of social public security. For a long time, thermal power has been in a dominant position in my country's electric power industry, and the massive consumption of traditional energy has seriously damaged the ecological environment and caused an energy crisis. The development of new energy power generation mainly based on wind energy and solar energy is an inevitable choice for building an environment-friendly society. Large power outages in traditional power grids occur from time to time, and distributed power generation technology using new energy for power generation has become a sustainable develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/15G06Q50/06
CPCG06F17/15G06Q50/06
Inventor 周二彪彭素江周红莲李娟王冬赵军王志江杜彬甄欣彭丽玉董昱廷纪凤坤薛静杰胡志云李云霞鹿晓明付林王伟范建兵田淼刘自发王泽黎
Owner STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST
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