Power quality controller voltage stability control method and device based on robust residual generator
A technology for power quality and voltage stability, applied in circuit devices, AC network voltage adjustment, electrical components, etc., can solve the problems of many adjustable parameters, complex evaluation signals of voltage robust controllers, and difficulty in obtaining optimization effects, and achieve the guarantee The effect of stability
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Embodiment 1
[0053] In step S110, a control framework of a power quality controller based on a stability controller and a compensation controller may be constructed, the compensation controller including an observer-based residual generator and a parameter matrix.
[0054] In the embodiment of this example, the method also includes:
[0055] Construct a control architecture of a power quality controller based on a stability controller and a compensation controller, the compensation controller includes an observer-based residual generator and a parameter matrix, and generates a state space expression of the residual generator
[0056]
[0057] Among them, e x is the state variable of the residual generator, for e x The differential of , x and w are the state quantity and disturbance input quantity of the standard plant respectively, A, C and E are the system matrix, output matrix and disturbance input matrix of the standard plant respectively, and L is the observer gain matrix.
[00...
Embodiment 2
[0072] Step 1, plug and play robust fault-tolerant control structure design
[0073] Step 1.1: Robust Residual Generator Based Control Architecture
[0074] Given the control loop of the plant G(s) and a control signal u provided by the existing controller K(s) 0 , the control loop is internally stable, then all internally stable controllers can be parameterized as:
[0075] u(s)=u 0 (s)+Q(s)r(s) (1)
[0076] In the formula: Q(s) is also called the compensation controller matrix, is the residual matrix generated by the perturbation.
[0077] If the original system is closed-loop stable, the introduction of Q(s) can still ensure the stability of the system. While enhancing the robustness of the closed-loop system, Q(s) does not affect the pre-designed tracking performance, and the output of Q(s) is directly superimposed on the output of the controller, which has a simple structure and does not need to change the parameters of the original controller. Improve system respo...
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