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Microgrid reliability evaluation method considering different operation strategies

A technology of operation strategy and reliability, applied in the direction of calculation, single-grid parallel feeding arrangement, instruments, etc., can solve the problem of inapplicable micro-grid reliability analysis and so on

Inactive Publication Date: 2018-01-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Reliability indicators can provide reference for microgrid operation and transformation, but traditional power system reliability analysis methods are not suitable for microgrid reliability analysis, and microgrids also have different operating strategies, so a method that takes into account different operating strategies is proposed The microgrid reliability evaluation method is particularly important

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  • Microgrid reliability evaluation method considering different operation strategies
  • Microgrid reliability evaluation method considering different operation strategies
  • Microgrid reliability evaluation method considering different operation strategies

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Embodiment Construction

[0060] The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0061] Such as figure 1 As shown, the method for evaluating the reliability of the microgrid according to the present invention considering different operation strategies includes the following steps:

[0062] Step 1: Establish the reliability model of the energy storage system according to the state space method, and obtain the equivalent failure rate and repair rate of the system; obtain the failure rate and average repair time of wind turbines, photovoltaic units and diesel generators, and the failure rate of wind turbines is taken as is 0.22 times / year, the average repair time is 60 hours / time, the failure rate of photovoltaic units is 0.12 times / year, the average repair time is 72 hours / time, the failure rate of diesel generators is 0.18 times / year, and the average repair time 12 hours / time;

[0063] In this embo...

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Abstract

The invention provides a microgrid reliability evaluation method considering different operation strategies. The method comprises the following steps: I, a reliability model for an energy storage system is built based on a state space method; II, according to historical data of wind speeds and sunlight radiation intensities over the past 10 years in a certain area, an autoregressive moving averagemodel (ARMA model) is built, and according to a power conversion formula, a single wind power and photovoltaic unit output model considering unit fault in the next year is solved; III, a load time sequence model which plans to use a microgrid for power supply is built; IV, a biogeography particle swarm hybrid algorithm is adopted to solve the optimal allocation of a wind-solar-diesel-storage capacity in the microgrid considering an operation strategy; and V, in consideration of the specific grid structure of the microgrid, reliability evaluation is carried out. Before reliability evaluation,the wind-solar-diesel-storage capacity connected to the microgrid is determined, the evaluation is in consideration of the specific grid structure of the microgrid and the operation strategies, the evaluation conforms to the reality, and the power supply reliability in the case of independent operation of the microgrid can be effectively mastered.

Description

technical field [0001] The invention relates to a method for evaluating the reliability of a microgrid, in particular to a method for evaluating the reliability of a microgrid considering different operation strategies. Background technique [0002] Since the 21st century, the use of fossil energy has been increasing, so there has been an energy crisis, and it has also brought a series of environmental problems, such as climate warming. New energy sources, including solar energy, wind energy, tidal energy, and biomass energy, have received widespread attention from various countries, so the use of distributed power sources for power supply has emerged. Microgrid has the characteristics of effective utilization of distributed power supply and flexible and intelligent control. Microgrid is a small power generation and distribution system composed of distributed power supply, energy storage device, energy conversion device, related loads, monitoring and protection devices, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06Q10/06G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 卢锦玲周松浩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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