Power system distributed cooperative control method based on consistency algorithm

A power system and collaborative control technology, applied in computing, electrical components, circuit devices, etc., can solve problems such as the influence of excitation control and speed regulation control, mechanical input power changes, etc., and achieve the effect of solving transient stability control problems

Pending Publication Date: 2021-11-26
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

However, in the above method, the mechanical input power of the generator is considered as a constant, but the mechanical input power will change in the actual excitation control, which means that the excitation control and speed control interact with each other

Method used

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  • Power system distributed cooperative control method based on consistency algorithm
  • Power system distributed cooperative control method based on consistency algorithm
  • Power system distributed cooperative control method based on consistency algorithm

Examples

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Embodiment Construction

[0061] Concrete implementation steps of the present invention are as Figure 9 shown.

[0062] figure 1 Taking the New England 39-node test system as an example, the system is built in the MATLAB-Simulink environment and equipped with a fast-acting external energy storage device, and the following distributed adaptive controller is selected:

[0063]

[0064] figure 2 Represents the communication topology graph and its adjacency matrix A of the New England 39-node test system. In addition, a three-phase ground short-circuit fault is set on the bus 23 (line 23-24 side), and the power system excitation stabilizer is in a closed state.

[0065] image 3 and Figure 4 They are the frequency dynamics and power angle dynamics of the 5th to 9th generators under only PSS control, and all synchronous generators in the system lose synchronization.

[0066] Figure 5 and Figure 6 They are the frequency dynamics and power angle dynamics of the 5th to 9th generators under exci...

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Abstract

A power system distributed cooperative control method based on a consistency algorithm comprises the following steps: (1) determining neighbor generators of each generator by using topology modeling, and setting communication weights among the generators so as to determine a parameter matrix of the system; (2) defining a relative power angle and a relative rotating speed between each synchronous generator and a neighbor generator thereof; (3) designing a leader following consistency error of each synchronous generator; and (4) designing a distributed self-adaptive controller by using the relative power angle and relative rotating speed information between the local generator and the neighbor generator, and performing active adjustment by adjusting the power output of an external energy storage device so as to asymptotically eliminate the deviation of all synchronous generators and enable the system to recover to be stable. According to the invention, a leader following consistency theory of a second-order nonlinear multi-agent system is popularized to an intelligent power grid, so that a transient stability control problem is solved; and the deviation of all synchronous generators is eliminated.

Description

technical field [0001] The invention relates to a distributed cooperative control method of a power system based on a consensus algorithm, which belongs to the technical field of smart grids. Background technique [0002] The stability of the power system is the main problem of its stable operation. When the system suffers from a serious fault, the generator often oscillates or even loses synchronous operation. Speed ​​control and excitation control are two main methods to improve the stability of the power system. If there is no coordinated control between the two, the input of electric energy will lead to the collapse of the power system, so part of the power must be discarded. At present, the abandonment rate of wind power generation in my country is about 10%, dozens of times that of Germany. Therefore, effective cooperative control strategies must be designed to damp the oscillations while restoring the stable operation of the system after a fault. [0003] The speed r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/28G06F30/20
CPCH02J3/00H02J3/28G06F30/20H02J2203/20G06F2113/04G06F2119/02
Inventor 陈世明田进鹏
Owner EAST CHINA JIAOTONG UNIVERSITY
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