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Chai X.-Z.,Henan Electrical Power Dispatching and Control Center | Wang H.-Y.,Henan Electrical Power Dispatching and Control Center | Fu H.-J.,Henan Electrical Power Dispatching and Control Center | Zheng L.,State Grid Electric Power Research Institute of China | And 3 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

The more and more operators and researchers of power grid have realized that the synthetic defending measures are important to avoid large scale blackout. The existing forewarning and preventive control systems focus on the real-time and on-line security and stability analysis and defending measures, but considering the whole process of power grid operating and production can realize a systematic and synthetic defending. The system engineering idea is applied to four important steps in power grid operating and production, and security and stability analysis and preventive control measures should be adopted. And so, four-grade forewarning and preventive control method is presented. The implementation of four-grade forewarning and preventive control method for secure and reliable operation of Henan power grid is introduced. The main content is implementation of detailed functions, innovative technology applications, and thinking and inspirations of application. It provides reference for future development of early-warning and preventive control system. Source


Chai X.,Henan Electrical Power Dispatching and Control Center | Zeng R.,Tsinghua University | Liang X.,Tsinghua University | Sun J.,Henan Electrical Power Dispatching and Control Center | Hao J.,Henan Electrical Power Dispatching and Control Center
Gaodianya Jishu/High Voltage Engineering | Year: 2015

Because HV shunt reactors are generally applied to limit power-frequency overvoltage in China and more and more TCSC are adopted in power transmission system, their functions in limiting power-frequency overvoltage and improving transient stability should be specially considered in the planning of series-compensated power transmission system. Consequently, we proposed a method of "pseudo-linear programming" to realize optimal scheme for series-compensated power transmission system. Using this method, according to the basic principle considering power-frequency overvoltage and transient stability of series-compensated power transmission system and the optimal economical object, we could get proper parameters of series capacitors and shunt reactors to realize optimal scheme. The proposed method has been applied to an existing power transmission background, showing its applicability. © 2015, High Voltage Engineering Editorial Department of CEPRI. All right reserved. Source

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