A Passive Robust Control Method
A control method and passive robust technology, applied in the electrical field, can solve problems such as difficulty in achieving global consistency, and achieve the effect of enhancing stability
Active Publication Date: 2018-06-26
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology
[0005] This application provides a passive robust control method to solve the current problem of difficulty in achieving global consistency in power systems containing doubly-fed induction generators
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[0021] see figure 1 , is a flow chart of a passive robust control method provided in the embodiment of the present application. The methods include:
[0022] Step 100, obtaining three characteristics in the power system, the three characteristics include: system nonlinearity a(x), parameter uncertainty b(x) and wind speed randomness d(t);
[0023] Step 200, aggregate the three characteristics to obtain the disturbance ψ(x,u,t);
[0024] Step 300, introduce virtual state x n+1 Characterize the disturbance ψ(x,u,t);
[0025] Step 400, introducing a disturbance observer to estimate the characterized disturbance in real time;
[0026] Step 500, introduce a robust passive controller to compensate the disturbance after the real-time estimation, and control the output of active power and reactive power of the doubly-fed induction generator in the power system, so that the generator is After the neutralization voltage drops, keep running off-grid.
[0027] It can be seen from th...
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The invention discloses a passive robustness control method. The method comprises the steps of acquiring three features in a power system, wherein the three features comprises a system nonlinearity a(x), parameter uncertainty b(x), and wind speed randomness d(t); combining the three features, so as to obtain disturbance Psi(x, u, t); introducing a virtual state xn+1 to represent the disturbance Psi(x, u, t); introducing a disturbance observer, and estimating the represented disturbance in real time; and introducing a robustness passive controller, compensating the disturbance estimated in real time, and controlling output of active power and reactive power of a double-feed induction generator in the power system. The method is applied to the power system containing the double-feed induction generator. When the power system containing the double-feed induction generator is disturbed, the output of the active power and reactive power of the double-feed induction generator is adjusted based on the robustness passive control of the disturbance observer, so as to make the power system more stable.
Description
technical field [0001] The present application relates to the field of electrical technology, in particular to a passive robust control method. Background technique [0002] In recent years, countries around the world have seen a growing demand for renewable energy due to the surge in global electricity demand and the reserve constraints of fossil fuels and their harmful effects on the environment. Wind energy is a green, non-polluting energy with huge reserves in nature. Therefore, the proportion of wind power generation in the power system is increasing. With the large-scale grid connection of wind farms, it is very important to ensure and enhance the stability of the power system. [0003] There are many methods used to enhance the stability of the power system in the prior art. From the perspective of control, there are feedback linearization control, sliding mode adaptive reverse push control, fuzzy logic control, control based on Lyapunov function, etc.; from the per...
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IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 李胜男吴水军何廷一彭俊臻陈勇刘明群周鑫张丽
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST