To simplify the transient stability analysis of a large-scale power system and realize real-time emergency control,a fast transient stability simulation algorithm based on real-time dynamic equivalence is proposed.Gen...To simplify the transient stability analysis of a large-scale power system and realize real-time emergency control,a fast transient stability simulation algorithm based on real-time dynamic equivalence is proposed.Generator models are grouped and aggregated according to a fast numerical integration.A fast calculation method of the admittance matrix is then proposed to calculate the parameters of an equivalent system,and numerical integration is performed using the obtained equivalent system.Then,based on integral sensitivity,a new fast emergency control strategy is proposed for the equivalent system.The final emergency control strategy is obtained by mapping the control strategy for the equivalent system back to the original system.The results of a simulation on an East China Power System that includes 496 generators and 5075 buses show that the suggested algorithm can output an accurate transient stability simulation result and form an effective emergency control strategy.The proposed algorithm is much faster than the existing solutions and has the potential to be used for online pre-decision.展开更多
This paper provides an OpenMP-based parallel Very Dishonest Newton(VDHN) algorithm with variable step size,running transient stability simulations(TSA) on multi-core computers.Under the framework of simultaneous solut...This paper provides an OpenMP-based parallel Very Dishonest Newton(VDHN) algorithm with variable step size,running transient stability simulations(TSA) on multi-core computers.Under the framework of simultaneous solution method of TSA,the step-size control strategy is used according to the local truncation error theory firstly.Then,computation of the generation units,which is the most time-consuming part of the simulation,is dynamically dispatched to several cores using an α dynamic scheduling scheme to obtain workload balancing based on OpenMP.Due to the convergence of Newton-type iterations,an adaptive Jacobian update control strategy is applied to reduce the sequential part of the simulation and the overhead generated by OpenMP.Several large scale test cases verify the validity and practicability of the proposed parallel algorithm,showing that the proposed approach achieves high speed-up and a considerable reduction in parallel overheads.展开更多
文摘To simplify the transient stability analysis of a large-scale power system and realize real-time emergency control,a fast transient stability simulation algorithm based on real-time dynamic equivalence is proposed.Generator models are grouped and aggregated according to a fast numerical integration.A fast calculation method of the admittance matrix is then proposed to calculate the parameters of an equivalent system,and numerical integration is performed using the obtained equivalent system.Then,based on integral sensitivity,a new fast emergency control strategy is proposed for the equivalent system.The final emergency control strategy is obtained by mapping the control strategy for the equivalent system back to the original system.The results of a simulation on an East China Power System that includes 496 generators and 5075 buses show that the suggested algorithm can output an accurate transient stability simulation result and form an effective emergency control strategy.The proposed algorithm is much faster than the existing solutions and has the potential to be used for online pre-decision.
基金supported by the National Natural Science Foundation of China (Grant No. 2012CB215106)the National Basic Research Program of China ("973" Program) (Grant No. 50977082)
文摘This paper provides an OpenMP-based parallel Very Dishonest Newton(VDHN) algorithm with variable step size,running transient stability simulations(TSA) on multi-core computers.Under the framework of simultaneous solution method of TSA,the step-size control strategy is used according to the local truncation error theory firstly.Then,computation of the generation units,which is the most time-consuming part of the simulation,is dynamically dispatched to several cores using an α dynamic scheduling scheme to obtain workload balancing based on OpenMP.Due to the convergence of Newton-type iterations,an adaptive Jacobian update control strategy is applied to reduce the sequential part of the simulation and the overhead generated by OpenMP.Several large scale test cases verify the validity and practicability of the proposed parallel algorithm,showing that the proposed approach achieves high speed-up and a considerable reduction in parallel overheads.
