Nonlinear Hydro Turbine Model for Medium and Long Term Power System Stability Analysis with Sharing Long Common Tunnel

2014 ◽  
Vol 960-961 ◽  
pp. 574-579
Author(s):  
Fan Tang ◽  
Li Jie Ding ◽  
Yu Fei Teng ◽  
Wei Wei
Keyword(s):  
Power System ◽  
Complex Structure ◽  
System Stability ◽  
Surge Tank ◽  
Theoretical Derivation ◽  
Diversion Tunnel ◽  
Hydro Turbine ◽  
Tunnel System ◽  
Turbine Model

Based on the theoretical derivation of hydraulic coupling relationship between the hydropower units sharing long common tunnel,the non-linear hydro turbine model with sharing long diversion tunnel system is established and order-reduced in accordance with the demand of power system simulation. And according to the complex structure characteristics of surge tank,a method of correcting surge tank storage constant with surge tank structure coefficient is proposed. This hydro turbine model can reflect the influence of surge tank and sharing common tunnel in the power system long term process,the accuracy of model is proved by comparison of simulation results and actual recording data in power system.

scholarly journals Testing a differential-algebraic equation solver in long-term voltage stability simulation

2006 ◽  
Vol 2006 ◽  
pp. 1-13
Author(s):  
José E. O. Pessanha ◽  
Alex A. Paz
Keyword(s):  
Power System ◽  
Algebraic Equation ◽  
Time Domain ◽  
Voltage Stability ◽  
Power System Stability ◽  
System Stability ◽  
Variable Order ◽  
Differential Algebraic Equation ◽  
Short Period

This work evaluates the performance of a particular differential-algebraic equation solver, referred to as DASSL, in power system voltage stability computer applications. The solver is tested for a time domain long-term voltage stability scenario, including transient disturbances, using a real power system model. Important insights into the mechanisms of the DASSL solver are obtained through the use of this real model, including control devices relevant to the simulated phenomena. The results indicate that if properly used, the solver can be a powerful numerical tool in time domain assessment of long-term power system stability since it comprises, among several important features, suitable and very efficient variable order and variable step-size numerical techniques. These characteristics are very important when CPU time is a great concern, which is the case when the power system operator needs reliable results in a short period of time. Prior to the present work, this solver has never been applied in power system stability computer analysis in time domain considering slow and fast phenomena.

Nuclear plant models for medium- to long-term power system stability studies

1995 ◽  
Vol 10 (1) ◽  
pp. 141-148 ◽  
Author(s):  
T. Inoue ◽  
T. Ichikawa ◽  
P. Kundur ◽  
P. Hirsch
Keyword(s):  
Power System ◽  
Power System Stability ◽  
Nuclear Plant ◽  
System Stability ◽  
Stability Studies

Interaction of a Nuclear Power Plant With the Egyptian Electrical Grid Based on PSS/E

2010 ◽  
Author(s):  
S. Othman ◽  
H. M. Mahmoud ◽  
S. A. Kotb
Keyword(s):  
Power System ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Simulation Software ◽  
System Stability ◽  
Medium Term ◽  
Electrical Grid ◽  
Unit Model

The capacity of the electrical power system in Egypt will increase rapidly in the coming twenty years. In year 2018, nuclear power generation will be connecting to the Egyptian electrical grid. Consequently, the interaction of nuclear power plants and other systems becomes a very important issue, and a detailed nuclear power model for the medium-term and long-term power system stability should be developed. However, there is no nuclear unit model that can describe the detailed characteristics of the nuclear unit in the available commercial power system simulation software. In this paper, a detailed pressurized water reactor (PWR) nuclear unit model for medium-term and long-term power system transient stability is proposed. The model is implemented by a user defined program in PSS/E through PSS/E Matlab Simulink Interface. This model can be used to analyze the interaction of nuclear power plants and other power systems. The simulation results show that the proposed model is valid.

scholarly journals Decentralized constrained optimal control of the multimachine power system stability improvement

2020 ◽  
Vol 17 (3) ◽  
pp. 1172
Author(s):  
Djibrine Abakar ◽  
A A Abouelsoud ◽  
Michael Juma Saulo ◽  
Simiyu Stanley Sitati
Keyword(s):  
Optimal Control ◽  
Power System ◽  
Complex Structure ◽  
Measurement Data ◽  
Power System Stability ◽  
Feedback Controller ◽  
System Stability ◽  
Control Input ◽  
Dynamical Equations ◽  
Constrained Optimal Control

<p>The paper proposes, a decentralized constrained optimal control of the multimachine power system stability. Today’s power network conditions, operating closer to their limits. Alternative Current power grids are more vulnerable and subject to instability than ever before. A three machine power system and four machines, power system connected with a transmission line lossy. Nonlinear controllers are more complex structure and inflexible to be used in practice paralleled with a linear controller. The linearized dynamical equations of the multimachine power system are near to an equilibrium point and it can be stabilized by using a decentralized constrained controller based on optimal control. The feedback controller, which comprises independent control stations receives the measurement data and influences the control input of the machine is only attached to the subsystems. State feedback controller guarantees the closed-loop system is asymptotically stable can guarantee the performance index. It bases designed controlled systems on the algebraic Riccati equations and all its poles are in the closed left half-plane. Decentralized constrained optimal control of the multimachine power system is achieved through simulation of the results. This achievement of results is proposed by improves power system stability.</p>

Research of the Adaptation of Turbine Model Related to the Grid

2014 ◽  
Vol 960-961 ◽  
pp. 1437-1441
Author(s):  
Ge Jin ◽  
Shu Chang Liu ◽  
Yu Jia Ma
Keyword(s):  
Power System ◽  
Rapid Development ◽  
System Stability ◽  
System A ◽  
The Stability ◽  
Turbine Speed ◽  
The Impact ◽  
Safety And Stability ◽  
Important Basis ◽  
Turbine Model

With the rapid development of China's interconnected power grid, power system operation environment has become increasingly complex. The safety and stability of the power system requirements are also increasing. Turbine is an important basis for the analysis of power system stability. This paper studied the influence of turbine parameters related to network on the stability of the grid from the perspective of the frequency domain, and obtained the impact properties of turbine speed control system parameters related to different oscillation frequency of the power system. The conclusions are validated from time domain. So that when analyzing the stability of the power system, a more targeted turbine model according to different research purposes can be chosen because the parameters’ importance can show the necessity of the modules.

scholarly journals Nonlinear hydro turbine model having a surge tank

2013 ◽  
Vol 19 (1) ◽  
pp. 12-28 ◽  
Author(s):  
Yun Zeng ◽  
Yakun Guo ◽  
Lixiang Zhang ◽  
Tianmao Xu ◽  
Hongkui Dong
Keyword(s):  
Surge Tank ◽  
Hydro Turbine ◽  
Turbine Model
Sign in / Sign up

Export Citation Format

Share Document