State Grid Corporation of China

State Grid Corporation of China Economic & Technology Research

Institute of Hubei Electric Power Company

Wuhan Central China Electric Power & Grid Technology Company, Ltd.

Dongjun Yang

Jisheng Li

Jingyou Xu

Hanping Xu

Jianyong Ding

Daqiang Xiao

Chunjian Luo

Yinya Zhang

Ting Hu

Shunming Bai

Cong Wei

The invention relates to a method for determining an integrated network loss rate in the UHV AC cross-regional electricity trading. The method includes fitting a curve relationship between integrated network loss rates and transmitting powers on the basis of theoretical calculations of the UHV AC transmission line loss, using a relational fitted curve between actual values of integrated network loss rates and transmitting powers calculated according to gateway power statistical data to perform geometrical average correction on the original curve, and making planned values of the integrated network loss rates to be closer to the actual values according to a method for determining UHV AC integrated network loss rates according to a correction curve function relation, which greatly increases fairness of the trading settlement. The method is simple and easy to implement with high accuracy, and applicable to planning and trading settlement of regular or real-time UHV AC electricity trading.

Method for determining integrated network loss rate in UHV AC cross-regional electricity trading

Disclosed is a method for determining a position of a forced power oscillation disturbance source in a regional interconnected power grid. According to the method, when forced power oscillation occurs in a regional power grid, an algebraic sum of energy flow directional factors in the regions of the regional interconnected power grid is calculated so as to online determine the position of the disturbance source in real-time. Compared with the conventional disturbance source positioning method based on an energy function, the disturbance source positioning method based on calculation of the energy flow directional factors provided by the invention can reduce the impact of a periodic disturbance component and an initial constant on the determination of an aperiodic component of branch potential energy, thus achieving higher accuracy. Moreover, the integration links are reduced and the calculation process is simplified, thus better meeting the requirements for real-time power grid calculation.

Method for determining position of forced power oscillation disturbance source in regional interconnected power grid

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Hubei, China

Dongjun Yang