scholarly journals Some issues with Quasi-Steady State model in long-term stability

2013 ◽  
Author(s):  
Xiaozhe Wang ◽  
Hsiao-Dong Chiang
Keyword(s):  
Steady State ◽  
State Model ◽  
Quasi Steady State ◽  
Term Stability ◽  
Long Term Stability ◽  
Steady State Model

scholarly journals Modified Quasi-Steady State Model of DC System for Transient Stability Simulation under Asymmetric Faults

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Jun Liu ◽  
Zhanhong Wei ◽  
Wanliang Fang ◽  
Chao Duan ◽  
Junxian Hou ◽  
...  
Keyword(s):  
Steady State ◽  
Transient Stability ◽  
State Model ◽  
Calculation Error ◽  
Half Cycle ◽  
Quasi Steady State ◽  
Dc Voltage ◽  
Dc System ◽  
Steady State Model ◽  
Negative Effect

As using the classical quasi-steady state (QSS) model could not be able to accurately simulate the dynamic characteristics of DC transmission and its controlling systems in electromechanical transient stability simulation, when asymmetric fault occurs in AC system, a modified quasi-steady state model (MQSS) is proposed. The model firstly analyzes the calculation error induced by classical QSS model under asymmetric commutation voltage, which is mainly caused by the commutation voltage zero offset thus making inaccurate calculation of the average DC voltage and the inverter extinction advance angle. The new MQSS model calculates the average DC voltage according to the actual half-cycle voltage waveform on the DC terminal after fault occurrence, and the extinction advance angle is also derived accordingly, so as to avoid the negative effect of the asymmetric commutation voltage. Simulation experiments show that the new MQSS model proposed in this paper has higher simulation precision than the classical QSS model when asymmetric fault occurs in the AC system, by comparing both of them with the results of detailed electromagnetic transient (EMT) model of the DC transmission and its controlling system.

DEM-based virtual experimental blast furnace: A quasi-steady state model

2017 ◽  
Vol 314 ◽  
pp. 557-566 ◽  
Author(s):  
Qinfu Hou ◽  
Dianyu E ◽  
Shibo Kuang ◽  
Zhaoyang Li ◽  
A.B. Yu
Keyword(s):  
Blast Furnace ◽  
Steady State ◽  
State Model ◽  
Quasi Steady State ◽  
Steady State Model
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