Coordinated Active Power Operation and Voltage Fluctuation Suppression Strategy for Traction Networks Considering Onboard Energy Storage
Aiming at the problem of unstable traction network voltage caused by the impact of locomotives on the traction network voltage during starting and braking,this paper firstly proposes a traction network optimal power flow calculation method that takes into account the influence of geographical and climatic parameters on the resistance value of the line.Secondly,it proposes a voltage fluctuation suppression strategy within the framework of onboard supercapacitor electric locomotives.Finally,through numerical simulation,it analyzes the distribution of locomotive end network voltage within the power supply range under three extreme geographical and meteorological scenarios.The results indicate that the influence of geographical and climatic parameters along the traction network on the locomotive end network voltage can't be ignored,and on this basis,the proposed strategy is further applied for case analysis.The research results show that the proposed strategy can effectively suppress the fluctuation of locomotive network voltage under limited energy storage capacity.Within the power supply range,this strategy can prevent the locomotive end network voltage from exceeding or falling below the allowable network voltage range of the traction converter,avoid traction blocking,and improve the reliability of locomotive operation.
traction blockadesuppression of network voltage fluctuation at the locomotive endgeographical and climatic conditiononboard energy storage
万方数据
维普
