The Analysis on the Effect of Speed Regulating System on Low Frequency Oscillation

2015 ◽  
Vol 737 ◽  
pp. 220-225
Author(s):  
Tong Tian Deng ◽  
Jia Sheng Wang ◽  
Xiao Jun Li ◽  
Xi Tian Wang ◽  
Jin Fu Liu ◽  
...  
Keyword(s):  
Control System ◽  
Forced Oscillation ◽  
Oscillation Mode ◽  
Low Frequency ◽  
Speed Control ◽  
Regulation System ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Speed Regulation ◽  
Speed Control System

With the strengthening of interconnected power grid connection, interval oscillation mode damping continue to improve, interval power oscillation accidents still occur, however, the negative damping mechanism of the classic cannot be satisfactorily explain these phenomena, this paper provides the researches forced oscillation mechanism of the low frequency oscillation, the speed control system is likely to form the forced oscillation source, speed regulation system and low frequency oscillation formed an adverse coupling effect. In this paper, based on the mechanism of their method, speed control system are analyzed, the effect of various parameters on the low frequency oscillation in order to avoid speed regulation system to participate in the low frequency oscillation provides technical support.

scholarly journals Twin Channel of Speed Control System Based on DSP

2011 ◽  
Vol 2-3 ◽  
pp. 447-451
Author(s):  
Bin Li ◽  
Zheng Feng Cao ◽  
Jin Ping Hong
Keyword(s):  
Control System ◽  
Frequency Conversion ◽  
Speed Control ◽  
Regulation System ◽  
Motor Speed ◽  
The Core ◽  
Speed Regulation ◽  
Speed Control System ◽  
Complex Algorithm ◽  
Exchange Data

A microprocessor as the core of the digital controller has become one of the major features AC speed regulation system in modern. Based on DSP as the core of the speed control system，it can realize complex algorithm. At the same time, it can achieve the diagnosis of system’s fault, and the self-setting of parameters controlled, etc. Thus it can make the motor speed control system have higher performance. This paper introduces the motor speed control system which consists of three DSP. This system is able to adjust two Frequency conversion motor. Division of work to the DSP is according to the function of DSP. Inter-DSP makes use of dual-port RAM to exchange data and communicate. They work together to achieve and improve the performance of the control system.

scholarly journals Research on Governor Parameter Optimization to Suppress Ultra-Low Frequency Oscillation of Power System Caused by Hydropower Unit

2021 ◽  
Vol 2087 (1) ◽  
pp. 012001
Author(s):  
Wei Yan ◽  
Yunbang Sun
Keyword(s):  
Single Machine ◽  
Optimization Algorithm ◽  
Low Frequency ◽  
System Model ◽  
Regulation System ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Speed Regulation ◽  
Damping Torque ◽  
The Relationship

Abstract In the actual power system with hydropower, long-time and ultra-low frequency oscillation events occur many times. It is found that the unreasonable setting of governor parameters is an important reason for the oscillation. Firstly, the single machine on load system model is used to analyse the relationship between the PID parameters of the governor and the system stability, then the relationship between oscillation mode and PID parameters of governor is analyzed by eigenvalue analysis method, and the negative damping provided by speed regulation system is analyzed by damping torque method, and then the particle swarm optimization algorithm is used to optimize the PID parameters. Through the analysis of the step response of the single machine system before and after the optimization and the damping torque coefficient provided by the speed regulation system, it shows the effectiveness of the optimization algorithm. Finally, in the simulation platform MATLAB/SIMULINK, a single machine load system model which is closer to the actual power grid is built. The governor parameters of the generator are simulated and verified, and the PID parameters are adjusted by using the parameters obtained by the optimization algorithm. The results show that the optimized parameters have a good suppression for the ultra-low frequency oscillation.

Identification the Low-Frequency Oscillation Stakeout of Power System by Wide-Area Measurement System

2011 ◽  
Vol 128-129 ◽  
pp. 594-601
Author(s):  
Yang Liu ◽  
Qian Huang ◽  
Dong Chen
Keyword(s):  
Power System ◽  
Measurement System ◽  
Rapid Development ◽  
Oscillation Mode ◽  
Low Frequency ◽  
Area Measurement ◽  
Wide Area ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Wide Area Measurement System

With the rapid development of interconnected power grid, the phenomenon of power system low-frequency oscillation appears unavoidably. Then, the appearance of wide-area measurement system provided a supporting technology for better scout low-frequency oscillation system and better recognize the oscillation mode . In this paper, the existing oscillation mode identifying methods are analyzed from the viewpoint of calculation speed, criterion, calculation accuracy, etc. Mainly compared the applicability of two methods, Prony and ESPRIT . Based on the above research, a new idea of monitoring power system low frequency oscillation based on WAMS is put forward in this paper.

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