China Southern Power Grid Dispatch and Control Center

Guangzhou, China

China Southern Power Grid Dispatch and Control Center

Guangzhou, China
SEARCH FILTERS
Time filter
Source Type

Zhang C.,Zhejiang University | Lin Z.,Zhejiang University | Wen F.,Zhejiang University | Xue Y.,NARI Group | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013

Rational planning of the network reconfiguration procedure is of great importance for restoring a power system with a complete blackout. The network characteristics of a power system and the impact caused by the failure of reconnecting a transmission line are addressed first, and three indices for evaluating the importance of each line are presented, including the bridging power of the line, the line connectivity, and the power-bearing degree of the line. A new method is next presented to comprehensively evaluate the importance of each line. Then, the interpretative structural modeling (ISM) is employed to direct the network reconfiguration after a complete blackout. With the quick and secure restoration of each generating unit as the premise, the restoration benefit is defined and its maximization employed as the objective to select the generating unit to be restored, with the restored generation capacity and the importance of each relevant line comprehensively considered. By applying the developed optimization model, the restoration sequence of the generating units and their restoration paths can be optimized simultaneously. Finally, a New England 10-unit 39-bus power system is employed to demonstrate the essential characteristics of the method developed. ©2013 State Grid Electric Power Research Institute Press.


Liu K.,China Southern Power Grid Dispatch and Control Center | Chen Y.,China Southern Power Grid Dispatch and Control Center | Zhang K.,China Southern Power Grid Dispatch and Control Center | Hou J.,China Southern Power Grid Dispatch and Control Center | And 3 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2014

The loss minimization for AC/DC hybrid power grid is different from that of traditional AC power grid. For traditional AC power grid, the transmission loss is minimized by adjusting the distribution of reactive power in the system. For AC/DC hybrid power grid, the transmission loss can be minimized by adjusting DC power which can change the active power flow allocated between AC and DC transmission corridors, and this method is important for China Southern Power Grid (CSG) where the power transfer is huge through its AC/DC hybrid transmission network. since there are few theortical studies and practical method for the loss minimization of AC/DC power grid, the dispatcher of CSG can only adjust DC power by experience to reduce the transmission loss. This paper presents the theoretical analysis of the loss minimization for AC/DC system. The optimal power flow model to minimize the system loss by adjusting DC power is proposed. The optima criteria, which is equal loss sensitivity rule of such problem is proposed. The practical computation method for large scale system, such as CSG with more than 9 000 buses, is also provided is the paper. The realization of proposed method by this paper is introduced and the effect shows that the benefit of loss minization for CSG AC/DC hybrid grid is significant. © 2014 Chin. Soc. for Elec. Eng..


Jiang T.,Tianjin University | Huang H.,China Southern Power Grid Dispatch and Control Center | Jia H.,Tianjin University | Li X.,Tianjin University | And 2 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2015

This paper presented a novel approach to identify coherent generator groups using projection pursuit algorithm (PPA) in power system. The PPA was developed to model for wide-area measurement data (WAMD). Via the PPA model and genetic algorithm, the high-dimensional WAMD was projected into low-dimensional subspace and the key projection vector which includes characteristic of coherent generator was obtained. With the vector, coherent generator groups were identified. Using the WAMD, the proposed approach avoids the influence of model parameters on clustering and is also simple to implement on-line coherency identification. The simulated results of a classic double-area interconnected system and China Southern Power Grid demonstrate the feasibility and validity of the proposed method, and the relationship between coherent generator groups and power system oscillation modes is indicated as well. © 2015 Chin. Soc. for Elec. Eng.


Sun Y.,China Southern Power Grid Dispatch and Control Center | Liu K.,China Southern Power Grid Dispatch and Control Center | Chen Y.,China Southern Power Grid Dispatch and Control Center | Hou J.,China Southern Power Grid Dispatch and Control Center
Dianwang Jishu/Power System Technology | Year: 2016

Yunnan power grid is planned to be interconnected asynchronously with main Southern power grid in 2016 with multiple HVDC transmission systems, and main Southern grid will still be parallel AC/DC transmission network. With increasing transmission power, reducing power loss is necessary. Present loss minimization method for parallel AC/DC transmission network will not meet requirements of hybrid AC/DC transmission network with asynchronous interconnection. In this paper, according to Yunnan and main Southern grid frame of asynchronous interconnection, hybrid AC/DC transmission network loss minimization model is built, considering constraints of power flow, transmission power and transfer capability limitation. Optimal solution of the model is obtained with Lagrangian multiplier method. Physical meaning of optimal solution is analyzed from two aspects, HVDC transmission of asynchronous interconnection and parallel AC/DC transmission network in main grid. Optimal criteria of equal loss sensitivity are proposed. Using existing power flow calculation tools, practical computation method for large scale system is also provided. Southern power grid in 2016 is selected to analyze HVDC power transmission adjustment's influence on power flow and loss and to calculate loss minimization. Result shows that HVDC power transmission adjustment can reduce network loss with transmission power unchanged. © 2016, Power System Technology Press. All right reserved.

Loading China Southern Power Grid Dispatch and Control Center collaborators
Loading China Southern Power Grid Dispatch and Control Center collaborators