Time filter

Source Type

Ni Z.,South Dakota State University | Tang Y.,University of Rhode Island | Sui X.,Dalian Power Supply Company | He H.,University of Rhode Island | Wen J.,Huazhong University of Science and Technology
International Journal of Electrical Power and Energy Systems | Year: 2016

We investigate an adaptive neuro-control approach, namely goal representation heuristic dynamic programming (GrHDP), and study the nonlinear optimal control on the multi-machine power system. Compared with the conventional control approaches, the proposed controller conducts the adaptive learning control and assumes unknown of the power system mathematic model. Besides, the proposed design can provide an adaptive reward signal that guides the power system dynamic performance over time. In this paper, we integrate the novel neuro-controller into the multi-machine power system and provide adaptive supplementary control signals. For fair comparative studies, we include the control performance with the conventional heuristic dynamic programming (HDP) approach under the same conditions. The damping performances with and without the conventional power system stabilizer (PSS) are also presented for comparison. Simulation results verify that the investigated neuro-controller can achieve improved performance in terms of the transient stability and robustness under different fault conditions. Source

Shi W.,Dalian Power Supply Company | Feng S.,Liaoning Electrical Power Company Ltd | Xia Y.,NARI Group
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012

This paper proposes a new intelligent distribution automation terminal design scheme. Manual configuration and modify of remote protocol point table is replaced by self-describing function of IEC 61850-6 standard. The ICD self-description file can be generated automatically by the hardware encoder. Distribution master station can get the ICD file from the distribution automation terminal via FTP. The three remote tables information and the distribution network topology information can be parsed by the ICD file. SCADA system in distribution master station can realize the auto generation of front telecontrol protocol tables, graphics and database. © 2012 State Grid Electric Power Research Institute Press. Source

Piao Z.,ShenYang Agricultural University | Zhao L.,Dalian Power Supply Company
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

In recent years, the development and utilization of renewable energy has been paid more and more attentions. Wind power is becoming the cheapest and most promising green energy. With the development of wind power technology, the proportion of wind power to the traditional energy becomes larger and larger gradually. As for the limitation of geographical location in wind farm establishment, most of the wind power farm plants are built on the end of the power system, wind power has great impacts on voltage quality of the grid in the actual wind farm. By analyzing the causes of reactive power loss in the internal wind farm, on the assumption that ensuring the operating stability of the wind farm system, a wind turbine was used for generating reactive power to compensate for the voltage fluctuations of the gird system caused by reactive power through specific calculating, so as to meet the requirements of the network operating system stability. The results show that the method is feasible. Source

Sui X.,Dalian Power Supply Company | Tang Y.,University of Rhode Island | He H.,University of Rhode Island | Wen J.,Huazhong University of Science and Technology
IEEE Transactions on Power Systems | Year: 2014

Low-frequency oscillation is one of the main barriers limiting power transmission between two connected power systems. Although power system stabilizers (PSSs) have been proved to be effective in damping inner-area oscillation, inter-area oscillation still remains a critical challenge in today's power systems. Since the low-frequency oscillation between two connected power systems is active power oscillation, power modulation through energy storage devices (ESDs) can be an efficient and effective way to maintain such power system stability. In this paper, we investigate the integration of a new goal representation heuristic dynamic programming (GrHDP) algorithm to adaptively control ESD to damp inter-area oscillation. A particle swarm optimization (PSO)-based power oscillation damper (POD) has also been proposed for comparison. Various simulation studies with residue-based POD controller design, the proposed PSO optimized controller design, and the GrHDP-based controller design over a four-machine-two-area benchmark power system with energy storage device have been conducted. Simulation results have demonstrated the efficiency and effectiveness of the GrHDP-based approach for inter-area oscillation damping in a wide range of system operating conditions. © 2014 IEEE. Source

Wei X.,Dalian University of Technology | Sun H.,Dalian University of Technology | Wei X.,China Electric Power Research Institute | Ma Q.,Liaoning Power Company | Xu F.,Dalian Power Supply Company
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2011

This paper presented a new control scheme of dual vector current and harmonic compensation controller in the stationary αβ reference frame(αβ-DVCC&HC) to restrain the 2nd harmonic ripple on the DC link and 3rd harmonic in the AC currents under unbalanced AC grid conditions. The DC voltage ripple is restrained without need of sequencial-component decomposition that is with the defect of instability and weak dynamic performance, and the possibility of 3rd harmonic AC currents through the current control loop. Furthermore, the compensation control for 3rd harmonic currents improving the power quality is supplemented to decrease the AC currents distortion in the normal operation AC system due to the active power ripple. The voltage source converter based high voltage direct current transmission (VSC-HVDC) model and αβ-DVCC&HC have been represented in PSCAD/EMTDC, the results show its availability. © 2011 Chin. Soc. for Elec. Eng. Source

Discover hidden collaborations