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Damping adaptive control system based on Youla parameterization and control method

An adaptive control and parameterization technology, applied in the direction of reducing/preventing power oscillation, can solve the problems of lack of effectiveness and robustness

Active Publication Date: 2013-10-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a parameterized Youla-based adaptive damping control system and control method for the lack of effectiveness and robustness of the existing wide-area damping control system in the case of unknown disturbances. above question

Method used

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  • Damping adaptive control system based on Youla parameterization and control method
  • Damping adaptive control system based on Youla parameterization and control method
  • Damping adaptive control system based on Youla parameterization and control method

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Embodiment 1

[0043] A damping self-adaptive control system based on Youla parameterization proposed by the present invention includes sequentially connected data input subsystems, self-adaptive control decision-making subsystems and result output subsystems.

[0044] The self-adaptive control decision-making subsystem includes system Youla parameterization module and controller Youla parameterization module connected with each other; system Youla parameterization module is connected with data reading subsystem, and controller Youla parameterization module is connected with result output subsystem.

[0045] The data reading subsystem is used to read in the wide-area signal data and send it to the Youla parameterization module of the system. The wide-area signal data is the bus frequency of each generator relative to the reference generator.

[0046] The system Youla parameterization module is used to establish the system Youla parameterization model, and determine the operating conditions of t...

Embodiment 2

[0094] use figure 2 The shown IEEE16 machine system further verifies the validity and feasibility of this method. The generator adopts a 6-order detailed model, the excitation adopts IEEE-DC1 type excitation, all load nodes are mixed load models, the active power is 15% constant current and 15% constant power, and the remaining load is 75% constant impedance load. In order to stabilize the regional low-frequency oscillation mode, the adaptive control strategy is investigated, and three energy storage systems (ESD) are added, which are installed on the buses 37, 44 and 52 respectively. According to the contribution factor, the optimal input signal is the bus frequency of bus 5, 13, 14 and 15.

[0095] Four interval oscillation modes are obtained through the characteristic analysis method, as shown in Table 1. The oscillation mode with the lowest frequency appears as the oscillation between the generators in regions 3, 4, 5 and the generators in regions 1 and 2. The second o...

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Abstract

The invention discloses a damping adaptive control system based on Youla parameterization and a control method. The damping adaptive control system comprises a data read-in subsystem, a self-adaptive control decision subsystem and a result output subsystem which are sequentially connected, wherein the self-adaptive control decision subsystem comprises a system Youla parameterization module and a controller Youla parameterization module, the system Youla parameterization module determines an operation state of a dynamic electric power system through updating system Youla parameters, the controller Youla parameterization module realizes online update of Youla parameters of a controller according to the updated system Youla parameters, and the self-adaptive controller which is suitable for the operation state of a present electric power system is acquired. The damping adaptive control system solves problems of lack of validity and robustness existing in a wide area damping control system in the prior art under an unknown disturbance condition.

Description

technical field [0001] The invention belongs to the technical field of power system stability control, and in particular relates to a damping adaptive control system and control method based on Youla parameterization. Background technique [0002] Interregional low-frequency oscillation in the power system is an essential attribute of the interconnected large power grid, and its severity varies with the size of the transmission power of the tie line and the change of the load characteristics. Due to the rapid development of the power system and its changing operating conditions, its security and stability problems are becoming more and more serious and need to be solved urgently. [0003] There are many uncertainties in the power system, such as the change of generator output, the change of network structure and the change of load, etc. h ∞ Robust control and μ control can reduce the impact of the above uncertainties on control to some extent. Uncertainties in these contr...

Claims

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Application Information

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IPC IPC(8): H02J3/24
Inventor 马静王彤王增平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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