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Luo X.,Electrical Reliability Council of Texas Inc. | Ma K.,National Electrical Power Dispatching and Communication Center
Dianwang Jishu/Power System Technology | Year: 2011

ERCOT region has witnessed the booming of wind generation development in recent years and leads the U. S. with the most installed wind generation capacity. ERCOT has gained rich experience in operations of wind generation. This paper introduces wind power forecast, and day-ahead and real-time operations of wind generation in ERCOT nodal power market. ERCOT's emergency operations in wind related events are also presented. The paper is concluded with a summary of ERCOT's experience that can be learned to improve operations of wind generation in China. Source


Lin Y.,Tsinghua University | Sun H.,Tsinghua University | Wu W.,Tsinghua University | Yu J.,National Electrical Power Dispatching and Communication Center | Zhang B.,Tsinghua University
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012

Formulation of day-ahead operation schedule for large-scale power grid requires security validation, including static security, dynamic and transient stability. It is an important and basic task for day-ahead security validation to generate an AC power flow that satisfies the demand of the schedule. A new method of generating the day-ahead schedule power flow is proposed, which consists in dividing the problem into two subproblems-the active subproblem and the reactive subproblem. The inconsistency of various kinds of schedule data is coordinated by solving the active subproblem, while a rational voltage distribution is achieved by solving the reactive subproblem. Both of the two problems are formulated as optimization models with constraints satisfied and are solved with an interior point algorithm. Numerical test results on the testing system and real power systems show that the method is capable of providing rational day-ahead schedule power flow. © 2012 State Grid Electric Power Research Institute Press. Source


Feng C.-Y.,National Electrical Power Dispatching and Communication Center | Feng C.-Y.,Xian Jiaotong University | Wang X.-F.,Xian Jiaotong University
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2011

Unit maintenance scheduling (UMS) is important to reduce the unit failure rate and guarantee the system reliability. The deregulation of power industry creates the independent market entities with different objectives, including the self-interested power producers for maximizing their potential payoffs and the independent system operator (ISO) for ensuring the system reliability. Therefore, UMS should also be determined to achieve a balance between the producers' benefits and the system reliability, which is different from the traditional system-centralized mechanism. Based on the current research, this paper mainly discusses the impacts of market environment on the UMS from several aspects, which contain the schedule mode, the related uncertainty factors, the assessment criterion, the producers' UMS model and the ISO's coordination strategy, and the model's solving algorithm. Furthermore, some challenges that may be faced in the future study are also presented. Source


Pei Z.,National Electrical Power Dispatching and Communication Center | Wu Y.,Huazhong University of Science and Technology | Ji C.,North China Electrical Power University | Li G.,State Grid Electric Power Research Institute of China
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

The distribution of hydropower stations in China and its hydro and water regulation characteristics are studied in the paper. The dispatch model for joint optimal dispatch of some large-scale hydroelectric power station group between southwest China & Central China is established. The dispatch problem of cross-regional hydropower station group may divide into several smaller tasks, then overall coordination can be made with reservoir operation experience. The analysis results show that hydropower generation optimal dispatch can not only increase the hydropower generation capacity, and but also can improve the guaranteed output of hydropower station group. The hydropower generation dispatch is of great significance for implementation of national strategy of transmitting power from west to east, optimizing resource allocation and achieving sustainable development. © 2010 State Grid Electric Power Research Institute Press. Source


Xin Y.,National Electrical Power Dispatching and Communication Center
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2010

The situation analysis on power grid large disturbance in recent years by CIGRE'2010 study committee (SC) C2 is presented. The key technology subjects are reviewed, including dynamic security assessment, wide area measurement system (WAMS), security criterions and key indices, as well as control center coordination. At last, preferential key technology subjects of SC C2 for the year of 2012 are listed. © State Grid Electric Power Research Institute Press. Source

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