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Generator L2 robust comprehensive control method based on square sum decomposition technique

A technology of comprehensive control and decomposition technology, which is applied in the field of generator L2 robust comprehensive control based on square sum decomposition technology, and can solve the problems that SOS decomposition technology has not been applied yet

Active Publication Date: 2017-08-18
GUANGXI UNIV
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  • Application Information

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Problems solved by technology

Therefore, for nonlinear systems containing uncertainties, the introduction of SOS decomposition technology reduces the complexity of its robust controller design
[0005] There are many nonlinear models containing uncertainties in the power system, but the SOS decomposition technology has not been applied to the related control research

Method used

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  • Generator L2 robust comprehensive control method based on square sum decomposition technique
  • Generator L2 robust comprehensive control method based on square sum decomposition technique
  • Generator L2 robust comprehensive control method based on square sum decomposition technique

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Experimental program
Comparison scheme
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Embodiment Construction

[0070] The above sum of squares L 2 The effectiveness of the robust synthetic control method will be in the case of figure 1 The verification is carried out in the 3-machine power system shown. figure 1 The initial power flow data of the power system are also given in .

[0071] figure 1 Medium Generator G 1 is an infinite system. G 2 and G 3 Fitted with squared sum L 2 Robust integrated controller, its model parameters are shown in Table 1:

[0072] Table 1 Generator G 2 and G 3 The model parameters of

[0073]

[0074] Will i Take the following values:

[0075] gamma 2 =0.1,γ 3 =0.1 (13)

[0076] SOS polynomial u ESOSi , u USOSi 、c 1i 、c 2i 、c 3i and c 4i It can be solved by SOSTOOLS toolbox:

[0077]

[0078]

[0079] In order to verify that the polynomials (13)-(15) can make the conditions (9) and (10) true, substitute the formulas (13)-(15) into the formulas (9) and (10), and use the SOSTOOLS toolbox to analyze the formula (9) and (10) for ...

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Abstract

The invention discloses a generator L2 robust comprehensive control method based on a square sum decomposition technique for improving the transient stability and the robustness of a power system. The method comprises steps of: firstly guaranteeing the satisfactory performance of the system by using a group of state-dependent inequalities: when the inequalities are positive semi-definite, the system is asymptotically stable and has L2 gain suppression performance to interference; then, converting the problem of determining whether the state-dependent inequalities are positive semi-definite into a problem of determining whether the state-dependent inequalities can be decomposed into a square sum (SOS) form; and finally, solving a SOS decomposition problem by using a SOSTOS toolbox to obtain a square sum L 2 robust comprehensive controller of the generator.

Description

technical field [0001] The invention relates to the field of generator control, in particular to a generator L based on square sum decomposition technology 2 Robust Synthetic Control Method. Background technique [0002] Excitation control affects the synchronous torque by changing the magnetic field of the generator, and thus can effectively improve the stability of the power system. The prime mover speed control is playing an increasingly important role in improving the power balance and stability of the power system due to the development of the fast electro-hydraulic speed control system. Therefore, organically combining the excitation and speed control of the generator to achieve comprehensive control has become a potential exploration direction in the field of generator control. Various nonlinear control methods have been applied in the research of comprehensive control of generators, such as: differential geometry method [1] , Direct Feedback Linearization (DFL) [...

Claims

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Application Information

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IPC IPC(8): H02P9/10H02P9/14H02J3/24
CPCH02J3/24H02P9/105H02P9/14
Inventor 李啸骢陈明媛王钧徐俊华
Owner GUANGXI UNIV
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