365 citations · 1.3k across the 23 of their papers we have counts for
9 papers · 1 filter
A Stochastic Multi-Agent Optimization Framework for Interdependent Transportation and Power System Analyses
Zhaomiao Guo, Fatima Afifah, Junjian Qi +1
We study the interdependence between transportation and power systems considering decentralized renewable generators and electric vehicles (EVs). We formulate the problem in a stoc…
Optimal distributed generation planning in active distribution networks considering integration of energy storage
Yang Li, Bo Feng, Guoqing Li +3
A two-stage optimization method is proposed for optimal distributed generation (DG) planning considering the integration of energy storage in this paper. The first stage determines…
An SQP Method Combined with Gradient Sampling for Small-Signal Stability Constrained OPF
Peijie Li, Junjian Qi, Jianhui Wang +3
Small-Signal Stability Constrained Optimal Power Flow (SSSC-OPF) can provide additional stability measures and control strategies to guarantee the system to be small-signal stable.…
EV Dispatch Control for Supplementary Frequency Regulation Considering the Expectation of EV Owners
Hui Liu, Junjian Qi, Jianhui Wang +3
Electric Vehicles (EVs) are promising to provide frequency regulation services due to their fast regulating characteristics. However, when EVs participate in Supplementary Frequenc…
Optimal Placement of Dynamic Var Sources by Using Empirical Controllability Covariance
Junjian Qi, Weihong Huang, Kai Sun +1
In this paper, the empirical controllability covariance (ECC), which is calculated around the considered operating condition of a power system, is applied to quantify the degree of…
Dynamic State Estimation for Multi-Machine Power System by Unscented Kalman Filter with Enhanced Numerical Stability
Junjian Qi, Kai Sun, Jianhui Wang +1
In this paper, in order to enhance the numerical stability of the unscented Kalman filter (UKF) used for power system dynamic state estimation, a new UKF with guaranteed positive s…
Decentralized Voltage and Power Regulation Control of Excitation and Governor System with Global Asymptotic Stability
Hui Liu, Junjian Qi, Jianhui Wang +1
The Global Asymptotic Stability (GAS), Voltage Regulation (VR), and Power Regulation (PR) of the excitation and governor control system are of critical importance for power system…
Adaptive Optimal PMU Placement Based on Empirical Observability Gramian
Junjian Qi, Kai Sun, Wei Kang
In this paper, we compare four measures of the empirical observability gramian, including the determinant, the trace, the minimum eigenvalue, and the condition number, which can be…
Optimal PMU Placement for Power System Dynamic State Estimation by Using Empirical Observability Gramian
Junjian Qi, Kai Sun, Wei Kang
In this paper the empirical observability Gramian calculated around the operating region of a power system is used to quantify the degree of observability of the system states unde…