Electric power

About: Electric power is a research topic. Over the lifetime, 73036 publications have been published within this topic receiving 636991 citations.

Power System Level Impacts of PHEVs

Abstract: This paper presents investigations into various aspects of how plug-in hybrid electric vehicles (PHEVs) could impact the electric power system. The investigation is focused on impacts on the power system infrastructure and impacts on the primary fuel utilizations due to PHEV charging. The investigation is presented in terms of examples of typical systems. Methodologies are presented for computing loss of life of distribution transformers, which sets the basis for needed expansion or upgrades of systems with PHEV penetration. In addition, a methodology is presented for evaluating the impact on primary fuel source utilization considering all the operating constraints of an electric power system. Examples of fuel utilization impact are presented for various levels of PHEV penetration. In general, PHEVs cause a shift of fuel utilization from petroleum to less expensive fuels utilized by electric power utilities.

Noncontact power receiving apparatus and vehicle including the same

Abstract: A noncontact power receiving apparatus for receiving electric power from a power transmission coil transmitting the electric power received from a power supply includes: a power reception coil for receiving, by means of electromagnetic resonance, electric power transmitted from the power transmission coil; a rectifier for rectifying the electric power received by the power reception coil; a load supplied with the electric power rectified by the rectifier; and a first relay provided on a path over which the electric power is transmitted from the power reception coil to the rectifier, for cutting off the electric power.

Generating energy transaction plans

Abstract: A computer implemented method, apparatus, and computer program product for generating an energy transaction plan to manage an electric vehicle charging transaction. The energy transaction planner identifies an electric vehicle associated with a charging station and a set of principals associated with a charging transaction for the electric vehicle. The charging transaction is a transaction associated with at least one of charging the electric vehicle, storing electric power in an electric storage mechanism associated with the electric vehicle, and de-charging the electric vehicle. The energy transaction planner receives charging transaction information. The charging transaction information comprises requirements, constraints, and preferences applicable to the charging transaction. The energy transaction planner generates an energy transaction plan based on the charging transaction information. The energy transaction plan comprises terms for governing all aspects of the charging transaction.

Power transmitting apparatus

Abstract: A power transmitting apparatus includes a clutch that operates based on pressure of a fed fluid to adjust a mode of power transmission of an engine or/and a motor/generator on a power transmission route, a first driving pump that feeds the fluid to the clutch by being driven in accordance with rotation of the motor/generator, and a second driving pump that feeds the fluid to the clutch by being driven in accordance with electric power, wherein a first engagement unit and a second engagement unit can be caused to engage rapidly or slowly by selecting one of the first driving pump and the second driving pump as a source of the fluid, and when a drive request of the clutch is present and a rotation speed of the motor/generator is lower than a predetermined rotation speed, the first engagement unit and the second engagement unit are caused to engage rapidly by feeding the fluid from the second driving pump.