Method for designing wide area damping control system with robustness

A control system and wide-area damping technology, applied in system integration technology, information technology support system, reducing/preventing power oscillation, etc., can solve problems such as type uncertainty, poor observability of interval low-frequency oscillation, easy deviation from stable equilibrium point, etc. , to achieve the effects of interference suppression, dynamic performance improvement and good robustness

Active Publication Date: 2011-09-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

With the expansion of the grid scale and the close connection of the grid, the limitations of the traditional control mode are becoming more and more apparent, mainly in two aspects: the traditional control mode uses local signals for feedback to form a closed-loop system, which makes the interval low-frequency oscillation The observability is poor, and the damping control effect cannot be effectively exerted; the tra...

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  • Method for designing wide area damping control system with robustness
  • Method for designing wide area damping control system with robustness
  • Method for designing wide area damping control system with robustness

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Embodiment Construction

[0053] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0054] The present invention proposes a wide-area damping control system with good robustness, including the following contents:

[0055] 1. The low-frequency oscillation problem in the power system is equivalent to the vibration suppression problem of the flexible structure, and the power system is linearized to obtain the second-order dynamic equation of the system as:

[0056]

[0057] In the formula:

[0058] Ψ is the n×1-dimensional system state vector;

[0059] γ is the measurement vector,

[0060] u is an m×1-dimensional control input vector, u=-Pγ, and P is a non-negative definite feedback matrix to be obtained;

[0061] M is the mass matrix;

[0062] C is the damping matrix;

[0063] K is the stiffn...

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Abstract

The invention discloses a method for designing a wide area damping control system with robustness in the technical field of power system stabilization control. In the method, the multiple input multiple output wide area damping control system is formed by utilizing a comprehensive gain matrix from global stability; and a phasor measurement unit (PMU) acquires power grid phasor data as a feedback signal, and the related additional control equipment of a power system is driven to timely suppress power oscillation. By the method, high robustness is ensured, the potential of a wide area phasor measurement system in the construction of wide area control and the improvement of large-scale dynamic performance of the system is fully developed, a plurality of additional controllers of the same type can be coordinated to form the wide area damping control system, and the additional controllers of different types also can be coordinated to fully and effectively develop a damping control function; and the method for designing the control system is simple and practical.

Description

technical field [0001] The invention belongs to the technical field of power system stability control, and in particular relates to a design method of a robust wide-area damping control system. Background technique [0002] As the scale and complexity of interconnected systems continue to increase, large-capacity, long-distance power transmission will become more frequent, switching power will increase, and transmission lines will remain on the edge of stability for a long time. In this case, the dynamic characteristics of the large power grid are more complex, the interval low-frequency oscillation occurs more and more frequently, the amplitude of the oscillation becomes larger and wider, and the scope of the oscillation becomes wider and wider, causing great trouble to the safe and stable operation of the power grid . [0003] The traditional controller for suppressing low-frequency oscillation in the interval is mostly the power system stabilizer PSS (Power System Stabil...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCY02E60/728Y04S10/265Y02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 马静王彤王增平米超王希
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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