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Load frequency control method for wind-diesel hybrid power system based on diesel engine side

A hybrid power system and load frequency control technology, applied in the control system, control of generators, electrical components, etc., can solve the problems of reducing the penetration rate of wind power and insufficient utilization of new energy

Inactive Publication Date: 2015-09-09
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

The document "Atsushi Yona, Hideomi Sekine, Chul-Hwan Kim, Output power control for large wind power penetration in small power system, Renewable Energy, 2009" aims at the single-domain wind-diesel hybrid power system, through the fuzzy control method to realize the wind power output power frequency adjustment, but this must reduce the penetration rate of wind power. Although the method is feasible, it does not make full use of new energy

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  • Load frequency control method for wind-diesel hybrid power system based on diesel engine side
  • Load frequency control method for wind-diesel hybrid power system based on diesel engine side
  • Load frequency control method for wind-diesel hybrid power system based on diesel engine side

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Embodiment Construction

[0062] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0063] (1) Mathematical model of wind-fired hybrid small power system

[0064] Establish a mathematical model of the wind power generation subsystem:

[0065] C p (λ,β)=c 1 (β)λ 2 +c 2 (β)λ 3 +c 3 (β)λ 4

[0066] c 1 ( β ) = c 10 + c 11 β ...

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Abstract

The invention relates to a load-frequency control method for a wind-diesel hybrid electric power system mainly relying on a diesel engine side. The method comprises the following steps of (1) controlling the output power of a wind driven generator by adopting a PID variable pitch control method according to the rated power of the wind driven generator; (2) controlling the output power of a diesel engine subsystem by adopting a sliding-mode control method based on a BP neural network observer, and establishing a system state equation by using the output power of the wind driven generator in the step (1) as a measurable disturbing term in the sliding-mode control; (3) calculating control input u(t) by adopting a reaching law method, and optimizing the frequency deviation of the whole hybrid electric power system according to the control input. Compared with the prior art, the load-frequency control method for the wind-diesel hybrid electric power system mainly relying on the diesel engine side has the advantages of being high in control precision, and improving the load frequency deviation of the electrical power system effectively.

Description

technical field [0001] The invention relates to a load frequency control method of an electric power system, in particular to a load frequency control method of an air-fired diesel hybrid power system mainly on the diesel engine side. Background technique [0002] In recent years, the pollution of the environment by traditional power generation forms such as thermal power has become increasingly serious, and in the context of the rapid depletion of traditional energy sources, new energy sources such as wind energy and solar energy have attracted more and more attention and research. However, areas rich in new energy resources are generally relatively remote, such as wind resources in islands and solar resources in Xinjiang are very rich. Due to the inconvenient transportation in remote areas and isolated islands, the large power grid cannot provide continuous power supply to them. In this way, these areas will be more equipped to vigorously develop and utilize new energy co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02P9/04
Inventor 米阳韩云昊包晓炜
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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