In this paper, the main contributions to congestion management and electricity pricing, i.e., nodal, zonal, and uniform electricity pricing, are surveyed. The key electricity market concepts are structured and a forma...In this paper, the main contributions to congestion management and electricity pricing, i.e., nodal, zonal, and uniform electricity pricing, are surveyed. The key electricity market concepts are structured and a formal model framework is proposed for electricity transportation, production, and consumption in the context of limited transmission networks and competitive, welfare maximizing electricity markets. In addition, the main results of existing short-run and long-run congestion management studies are explicitly summarized. In particular, the important interconnection between short-run network management approaches and optimal long-run investments in both generation facilities and network lines are highlighted.展开更多
This paper constructs a synthetic framework for the operational reliability evaluation and risk mitigation of asynchronous grids coupled through flexible high-voltage DC(HVDC)systems(AGs-FDCSs).First of all,an analyti...This paper constructs a synthetic framework for the operational reliability evaluation and risk mitigation of asynchronous grids coupled through flexible high-voltage DC(HVDC)systems(AGs-FDCSs).First of all,an analytical model for the unavailability of DC units is reformulated to refine and facilitate the reliability modeling of such flexible HVDC systems considering their time-dependent features as well as the impacts of converter station configurations.Subsequently,the operational risk associated with the redispatch procedure is extended to the reliability evaluation of composite power system,and the risk is mitigated through an optimal power flow(OPF)based short-term state assessment model.In addition,some new reliability indices like expected DC transmission power(EDCTP)and DC terminal outage probability(DCTOP)are defined to quantify the impact of the reliability of flexible HVDC systems on the entire grid.The effectiveness of the proposed framework on a modified IEEE RTS-79 system is validated with the elaborate discussions on the time-dependent reliability of AGs-FDCSs as well as the impacts of the converter station configurations.展开更多
文摘In this paper, the main contributions to congestion management and electricity pricing, i.e., nodal, zonal, and uniform electricity pricing, are surveyed. The key electricity market concepts are structured and a formal model framework is proposed for electricity transportation, production, and consumption in the context of limited transmission networks and competitive, welfare maximizing electricity markets. In addition, the main results of existing short-run and long-run congestion management studies are explicitly summarized. In particular, the important interconnection between short-run network management approaches and optimal long-run investments in both generation facilities and network lines are highlighted.
基金supported by the National Natural Science Foundation of China(No.52177071)。
文摘This paper constructs a synthetic framework for the operational reliability evaluation and risk mitigation of asynchronous grids coupled through flexible high-voltage DC(HVDC)systems(AGs-FDCSs).First of all,an analytical model for the unavailability of DC units is reformulated to refine and facilitate the reliability modeling of such flexible HVDC systems considering their time-dependent features as well as the impacts of converter station configurations.Subsequently,the operational risk associated with the redispatch procedure is extended to the reliability evaluation of composite power system,and the risk is mitigated through an optimal power flow(OPF)based short-term state assessment model.In addition,some new reliability indices like expected DC transmission power(EDCTP)and DC terminal outage probability(DCTOP)are defined to quantify the impact of the reliability of flexible HVDC systems on the entire grid.The effectiveness of the proposed framework on a modified IEEE RTS-79 system is validated with the elaborate discussions on the time-dependent reliability of AGs-FDCSs as well as the impacts of the converter station configurations.
