Title :
On-line transient stability assessment in operation-DEEAC in Northeast China Power System
Author :
Xue, Y. ; Luo, Y. ; Xue, Feng ; Zhu, Wei ; Yang, K. ; Jiang, J.
Author_Institution :
Nanjing Autom. Res. Inst., China
Abstract :
Achievements in on-line transient stability assessment of the Northeast China Power System are reported in this paper. The improved dynamic extended equal area criterion (DEEAC) is interfaced to a state estimator with DBMS in an advanced EMS environment. Thousands of DEEAC results, recorded from snapshots of on-line estimations have been thoroughly checked with an off-line numerical integration method. For first swing stability assessment of both symmetrical and asymmetrical faults, there are only less than 1% of cases whose errors exceed 10%. Moreover, all large errors occur with mild contingencies only. Each critical clearing time (CCT) calculation takes about 10 s CPU time of a VAX-11/785 computer. In an HABITAT environment (developed by ESCA Corp.), the on-line EEAC package is very user-friendly.<>
Keywords :
database management systems; electrical faults; load management; power system analysis computing; power system stability; power system transients; state estimation; DBMS; EMS environment; HABITAT environment; Northeast China Power System; VAX-11/785 computer; asymmetrical faults; critical clearing time; dynamic extended equal area criterion; first swing stability assessment; off-line numerical integration method; on-line transient stability assessment; state estimator; symmetrical faults; user-friendly package; Control systems; Medical services; Power system analysis computing; Power system control; Power system dynamics; Power system modeling; Power system stability; Power system transients; Power systems; SCADA systems;
Conference_Titel :
TENCON '93. Proceedings. Computer, Communication, Control and Power Engineering.1993 IEEE Region 10 Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-1233-3
DOI :
10.1109/TENCON.1993.320588
