State Grid Corporation of China

State Grid Corporation of China Economic & Technology Research

Institute of Hubei Electric Power Company

Economic & Technology Research Institute of Hubei Electric Power Company

Central China Grid Company Limited

Jingyou Xu

Qing Chang

Dongjun Yang

Hanping Xu

Jisheng Li

Chunming Wang

Shunming Bai

Youping Xu

Ting Hu

Daqiang Xiao

Dawei Huang

Xiuwen Xiong

Yinya Zhang

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

The invention relates to a parallelization method for black-start subsystems of a power grid with external support, which includes, after power blackout, partitioning the power grid into subsystems, and respectively performing black-start on the subsystems based on a power grid black-start research scheme, performing stability check on each subsystem, performing voltage calculation on parallel lines between the subsystems, checking the parallelizing simulation of the subsystems, and determining a feasible parallelizing path and a recommendable charging direction. The method further includes, starting from the subsystems having external support and higher stability, networking them with an external power grid, parallelizing the networked subsystems having external support to obtain a subnet of the subsystems, parallelizing subsystems having no external support with the subnet of the subsystems to obtain a regional subnet, and finally parallelizing the remaining subsystems with the regional subnet to implement parallelization of black-start subsystems of the whole power grid.

Parallelization method for black-start subsystems of power grid with external support

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Hubei, China

Jingyou Xu