Reliability Calculation Method of Microgrid Based on Combined Operation Strategy of Microturbine and Energy Storage
An operation strategy, a technology for micro-gas turbines, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of different reliability effects, reliability problems, and failure to consider the impact of the reliability of the energy storage system.
Active Publication Date: 2017-09-26
CHONGQING UNIV
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The investment cost of the energy storage system is directly affected by its own capacity. The higher the capacity of the energy storage system, the greater the improvement of system reliability, but the investment will be too high, and the capacity of the energy storage system is too small, and the reliability of the micro grid won't improve much
[0004] The existing technology has the following disadvantages in dealing with system reliability: First, because there are many energy storage system operation strategies in the microgrid, different operation strategies have different effects on the reliability of the microgrid, and the existing technology does not analyze the reliability of the microgrid for different strategies. Second, with the expansion of the scale of the microgrid, the energy storage system is also developing towards a large-scale trend, and its reliability also has problems. The existing technology does not consider the impact of the reliability of the energy storage system itself
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[0124] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0125] A microgrid reliability calculation method based on a microturbine-energy storage joint operation strategy, including the following steps:
[0126] a: Establish a micro-grid deficit power model including wind turbines, and use a micro-turbine-energy storage joint operation strategy to balance the deficit power. This step includes:
[0127] Establish a short-sequence state model of microgrid with wind turbines;
[0128] The time series state model of the microgrid deficit power is converted into a frequency domain model by Fourier transform;
[0129] The deficit power is decomposed into low-frequency components and high-frequency components through the frequency domain model of the deficit power of the microgrid, and a micro-gas turbine is provided that uses a micro-turbine to provide the low-frequency component of the deficit ...
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The invention discloses a method for calculating the reliability of a microgrid based on a micro-gas turbine-energy storage joint operation strategy, which includes the following steps: a: establishing a micro-grid deficit power model, and using a micro-gas turbine-energy storage joint operation strategy to balance the deficit Power; b: Establish a 6-state reliability model of the energy storage system based on the micro-turbine-energy-storage joint operation strategy; c: Use time-series Monte Carlo simulation method to analyze the reliability of the micro-grid based on the micro-turbine-energy storage joint operation strategy to evaluate. The remarkable effect is: the invention not only provides a combined operation strategy based on micro-gas turbine-energy storage, but also takes into account the influence of the reliability of the energy storage system itself on the reliability of the micro-grid; Reliability; it can also reduce the capacity configuration requirements of the energy storage system and save energy.
Description
technical field [0001] The invention relates to the field of power system evaluation, in particular to a method for calculating the reliability of a micro-grid based on a micro-gas turbine-energy storage joint operation strategy. Background technique [0002] With the depletion of fossil energy and the outbreak of environmental crisis worldwide, people pay more and more attention to distributed power. Distributed energy is rich in resources, clean and pollution-free, and has a wide distribution range, making it widely used in microgrids. However, due to the shortcomings of distributed power sources such as poor controllability, output power affected by the environment, and intermittent and random nature, the introduction of energy storage systems in the microgrid can effectively maintain the stable operation of the microgrid, improve the reliability of the microgrid, and improve the reliability of the microgrid. Utilization of distributed energy resources. [0003] Energy ...
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IPC IPC(8): H02J3/00
Inventor 胡博谢开贵李龙云聂佳焰李昌林
Owner CHONGQING UNIV