Energy dispatching method of tramcar hybrid energy storage system

Abstract

The invention discloses an energy dispatching method of a tramcar hybrid energy storage system. The energy dispatching method comprises the following steps of (1) acquiring train driving characteristic, determining train traction load energy, performing fuzzy control on a train power monitored in real time and a supercapacitor charge state to obtain charging rate of a lithium battery energy storage unit, and calculating maximum charge-discharge power of the two energy storage units; (2) calculating capacity of the hybrid energy storage system, calculating respective pre-allocation energy of the two energy storage units in the hybrid energy storage system by a lowpass filtering algorithm according to a start and stop load energy curve of a train; and (3) performing secondary correction on the pre-allocation energy according to the respective real-time charge states of the two energy storage units, multiplying a secondarily-corrected energy value by an adjustment coefficient by taking maximum charge-discharge energy and the maximum charge-discharge power obtained in the step (1) as a constraint condition, and determining energy allocation of the two energy storage units. The energy dispatching method is used for energy recycling of the tramcar, and the energy utilization efficiency and the system stability are improved.

Description

technical field [0001] The invention relates to an energy dispatching method for an urban rail transit system, in particular to an energy dispatching method for a tram hybrid energy storage system. Background technique [0002] With rapid economic development, increasing urban population, accelerating urbanization, increasing traffic congestion, and increasing global energy consumption. In order to solve the above problems, urban rail transit came into being. It has the characteristics of large transportation volume, high environmental friendliness, high density, punctuality, comfort, safety and reliability. The rapid rise of urban rail transit has become the key to solve the large population and inconvenient transportation in my country. . Up to now, more than 300 cities around the world have built rail transit projects including subways and light rails. In developed countries, urban rail transit has become the main body of urban traffic, accounting for about 50%-80% of th...

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Problems solved by technology

[0003] Urban rail transit provides great convenience for people to travel, but it also brings a problem that cannot be ignored-huge energy consumption

The main reasons for this phenomenon include: (1) There is an intersection between the transportation network and the regional energy network, but the nearby renewable energy cannot be consumed; (2) A large amount of renewable energy generated when the urban rail transit system starts and stops has not been recovered (3) Demand side response technology is

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