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Miniature gas turbine robust control method based on H(indefinite) mixed sensitivity

A technology of micro gas turbine and mixed sensitivity, which is applied to electrical components, single AC networks with different frequencies, AC network circuits, etc., and can solve problems such as frequency fluctuations and microgrid power fluctuations

Active Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fluctuation of WP, PV and Load, the power fluctuation and frequency fluctuation of the microgrid are caused

Method used

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  • Miniature gas turbine robust control method based on H(indefinite) mixed sensitivity
  • Miniature gas turbine robust control method based on H(indefinite) mixed sensitivity
  • Miniature gas turbine robust control method based on H(indefinite) mixed sensitivity

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing, the present invention is based on H ∞ A mixed-sensitivity robust control method for a micro gas turbine is described in detail.

[0048] In this example based on H ∞ Mixed Sensitivity Robust Control Method for Micro Gas Turbines. Including the following steps:

[0049] (1) The parameter data of a certain microgrid are shown in Table 1, it can be seen that the controlled object

[0050] Table 1 parameter values

[0051]

[0052] (2) Let ω d =0.5, u max = 1000, then the parameters selected to meet the constraints are: K 1 =20,K 2 =0.001,K 3 = 0.1, A = 5, ω c=20, so the weighting functions are W 3 = 1 100 s + 1 10 .

[0053] (3) Solve the closed-loop system transfer function T of the generalized controlled object zw (s) are as follows:

[0054] ...

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Abstract

The invention provides a miniature gas turbine robust control method based on H(indefinite) mixed sensitivity, which comprises the following steps: according to a relationship between a micro-grid frequency deviation deltaf and a power deviation deltaP, establishing a transfer function Gp(s) of a miniature gas turbine; establishing a sensitivity function S and a complementary sensitivity function T, and constructing weighting functions W1, W2, W3 which satisfy restriction conditions; and establishing a closed-loop system transfer function Tzw(s) of a generalized controlled object of the micro-grid, and furthermore a transfer function K(s) of an H(indefinite) controller Chinf of the miniature gas turbine. According to the miniature gas turbine robust control method, an MT power controller based on robust H(indefinite) control is constructed, and defects of high difficulty for designing a plurality of controllers, low coordination, complicated structure, etc. in prior art can be overcome. Robustness, dynamic performance and interference resistance of a micro-grid system are effectively improved.

Description

technical field [0001] The present invention is based on the H ∞ The mixed-sensitivity micro-gas turbine robust control method belongs to the field of new energy power system and power grid technology. Combined with modern robust control, the micro-gas turbine controller is designed for the stable and safe operation of the micro-grid. It is suitable for wind power generation systems, photovoltaic power generation systems, A micro-turbine, a fuel cell, a load-controllable electrolyzer system (or energy storage system) for producing hydrogen, and a micro-grid composed of electric loads. Background technique [0002] With the increase of energy demand and the depletion of fossil energy, the change of energy structure forces people to actively seek and develop green and recyclable new energy. Solar energy and wind energy have effectively alleviated energy demand, but the instability of wind energy and solar energy is a serious challenge to the quality of electric energy and the...

Claims

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Application Information

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IPC IPC(8): H02J3/02H02J3/24
CPCH02J3/00H02J3/02H02J2203/20
Inventor 李相俊陈金元谢巍郭光朝惠东
Owner STATE GRID CORP OF CHINA
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