TY - GEN
T1 - Study of WLS state estimation convergence characteristics under topology errors
AU - Chen, Jiaxiong
AU - Liao, Yuan
AU - Gou, Bei
PY - 2013
Y1 - 2013
N2 - Power system state estimation determines the optimal system states based on the network model and the gathered measurements from the system. Weighted least square (WLS) state estimation is the most commonly used method in power industry, and it may suffer divergence under stressed system conditions. This paper investigates the impacts of variations of line power flow increment and topology errors on convergence property of the WLS state estimator. A simple 3-bus system and the IEEE 118-bus system are used as the test cases and simulation results are reported. Furthermore, this paper also studies the effect of adding phasor measurement unit (PMU) voltage phasor measurements to convergence property of WLS state estimation. Simulation results show that adding PMU measurements could generally improve the robustness of state estimation, but there exists a few special cases violating the rule and needs to be taken care when applying PMU measurements in state estimation.
AB - Power system state estimation determines the optimal system states based on the network model and the gathered measurements from the system. Weighted least square (WLS) state estimation is the most commonly used method in power industry, and it may suffer divergence under stressed system conditions. This paper investigates the impacts of variations of line power flow increment and topology errors on convergence property of the WLS state estimator. A simple 3-bus system and the IEEE 118-bus system are used as the test cases and simulation results are reported. Furthermore, this paper also studies the effect of adding phasor measurement unit (PMU) voltage phasor measurements to convergence property of WLS state estimation. Simulation results show that adding PMU measurements could generally improve the robustness of state estimation, but there exists a few special cases violating the rule and needs to be taken care when applying PMU measurements in state estimation.
KW - Load increment
KW - Phasor measurement unit
KW - Topology error
KW - WLS state estimation
UR - http://www.scopus.com/inward/record.url?scp=84883214962&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883214962&partnerID=8YFLogxK
U2 - 10.1109/SECON.2013.6567383
DO - 10.1109/SECON.2013.6567383
M3 - Conference contribution
AN - SCOPUS:84883214962
SN - 9781479900527
T3 - Conference Proceedings - IEEE SOUTHEASTCON
BT - IEEE SoutheastCon 2013
T2 - IEEE SoutheastCon 2013: Moving America into the Future
Y2 - 4 April 2013 through 7 April 2013
ER -