本文首先基于经济学原理,对 DA 和 RT 市场的三种交易模式和两部制电价进行了理论分析。在考虑电力行业独特技术经济特征的基础上,为了保证短期调度的经济效率性,并为长期发电、输电投资提供正确的经济激励。我们认为中国应该考虑放弃...本文首先基于经济学原理,对 DA 和 RT 市场的三种交易模式和两部制电价进行了理论分析。在考虑电力行业独特技术经济特征的基础上,为了保证短期调度的经济效率性,并为长期发电、输电投资提供正确的经济激励。我们认为中国应该考虑放弃发展两部制电价机制,转向发展单一市场出清价格式的完全成本库 DA 和 RT 市场交易模式。同时,考虑到中国电力改革正处于转型期,我们认为,在双边契约,电力交易所和电力库三种完全成本库交易模式中,短期内的最优选择是强制性电力交易所,而在长期内,我国应该大力促进双边交易的发展。展开更多
The low-frequency oscillation(LFO)has occurred in the train-network system due to the introduction of the power electronics of the trains.The modeling and analyzing method in current researches based on electrified ra...The low-frequency oscillation(LFO)has occurred in the train-network system due to the introduction of the power electronics of the trains.The modeling and analyzing method in current researches based on electrified railway unilateral power supply system are not suitable for the LFO analysis in a bilateral power supply system,where the trains are supplied by two traction substations.In this work,based on the single-input and single-output impedance model of China CRH5 trains,the node admittance matrices of the train-network system both in unilateral and bilateral power supply modes are established,including three-phase power grid,traction transformers and traction network.Then the modal analysis is used to study the oscillation modes and propagation characteristics of the unilateral and bilateral power supply systems.Moreover,the influence of the equivalent inductance of the power grid,the length of the transmission line,and the length of the traction network are analyzed on the critical oscillation mode of the bilateral power supply system.Finally,the theoretical analysis results are verified by the time-domain simulation model in MATLAB/Simulink.展开更多
The allocation of transmission cost provides important references and signals for system expansions and investments.This paper proposes a power tracing based equivalent bilateral exchange(PTEBX)method in which network...The allocation of transmission cost provides important references and signals for system expansions and investments.This paper proposes a power tracing based equivalent bilateral exchange(PTEBX)method in which network users are responsible for not only their induced power flows,but also power flows induced by whom they have equivalent bilateral exchanges with.The equivalent bilateral exchanges are recognized based on the power tracing.To evaluate the performance of different methods of allocating transmission cost,seven criteria are put forward that take into consideration characteristics of power systems.Theoretical analysis is then conducted to certify whether the methods satisfy the criteria.The results indicate that only the PTEBX method is able to satisfy all the seven criteria.Numerical examples based on the IEEE-30 system are presented to further demonstrate the applicability of the proposed method.展开更多
文摘本文首先基于经济学原理,对 DA 和 RT 市场的三种交易模式和两部制电价进行了理论分析。在考虑电力行业独特技术经济特征的基础上,为了保证短期调度的经济效率性,并为长期发电、输电投资提供正确的经济激励。我们认为中国应该考虑放弃发展两部制电价机制,转向发展单一市场出清价格式的完全成本库 DA 和 RT 市场交易模式。同时,考虑到中国电力改革正处于转型期,我们认为,在双边契约,电力交易所和电力库三种完全成本库交易模式中,短期内的最优选择是强制性电力交易所,而在长期内,我国应该大力促进双边交易的发展。
基金This work was supported by the Applied Basic Research Program of Science and Technology Plan Project of Sichuan Province of China(No.2020YJ0252).
文摘The low-frequency oscillation(LFO)has occurred in the train-network system due to the introduction of the power electronics of the trains.The modeling and analyzing method in current researches based on electrified railway unilateral power supply system are not suitable for the LFO analysis in a bilateral power supply system,where the trains are supplied by two traction substations.In this work,based on the single-input and single-output impedance model of China CRH5 trains,the node admittance matrices of the train-network system both in unilateral and bilateral power supply modes are established,including three-phase power grid,traction transformers and traction network.Then the modal analysis is used to study the oscillation modes and propagation characteristics of the unilateral and bilateral power supply systems.Moreover,the influence of the equivalent inductance of the power grid,the length of the transmission line,and the length of the traction network are analyzed on the critical oscillation mode of the bilateral power supply system.Finally,the theoretical analysis results are verified by the time-domain simulation model in MATLAB/Simulink.
基金supported by the Management Consulting Program of the State Grid Corporation of China under Grant SGTYHT/15-WT-218.
文摘The allocation of transmission cost provides important references and signals for system expansions and investments.This paper proposes a power tracing based equivalent bilateral exchange(PTEBX)method in which network users are responsible for not only their induced power flows,but also power flows induced by whom they have equivalent bilateral exchanges with.The equivalent bilateral exchanges are recognized based on the power tracing.To evaluate the performance of different methods of allocating transmission cost,seven criteria are put forward that take into consideration characteristics of power systems.Theoretical analysis is then conducted to certify whether the methods satisfy the criteria.The results indicate that only the PTEBX method is able to satisfy all the seven criteria.Numerical examples based on the IEEE-30 system are presented to further demonstrate the applicability of the proposed method.
