Suppression method of urban rail transit power supply current spike based on temporary speed limit in section

Abstract

The invention discloses a method for suppressing power supply current spikes of urban rail transit based on interval temporary speed limit. The method is as follows: establish a train traction power supply system model, including a train model, a substation model, a catenary model, and a return network model; establish an operation data module, including a train data module, a substation data module, and a line data module; Speed ​​train operation characteristics module; establish a train operation characteristics module with temporary speed limit in the interval, including judging whether to limit the speed according to the peak value of the allowable power supply current, setting a speed limit mode that matches the peak value of the power supply current; traversing all time to get the temporary limit The current of the substation feeder cabinet under the speed mode is compared with the current of the substation feeder cabinet without the temporary speed limit mode to test the effect of the temporary speed limit on suppressing the peak of the supply current. The invention can suppress the peak value of the power supply current, prevent tripping accidents, and has the advantages of high feasibility, low cost and strong adjustability.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a method for suppressing power supply current spikes of urban rail transit based on inter-section temporary speed limit. Background technique [0002] Urban rail transit power supply system is the power source of urban rail transit operation, responsible for the supply and transportation of electric energy, providing power for train operation and power and lighting power for stations, sections, depots, control centers and other buildings. The power supply system should have high security and reliability to ensure power consumption. In the actual operation of the line, due to the excessive traffic density, excessive passenger capacity, emergency repairs and other harsh working conditions on the line, frequent voltage shocks and current shocks will occur in the traction step-down hybrid substation, resulting in peak power supply current and high-speed circuit breaks The...

AI Technical Summary

Problems solved by technology

However, the above scheme has the following problems: (1) Excessively increasing the set current range of the DC cabinet will increase the heat generated by the equipment, reduce the sensitivity of the components, cause the components to age, and increase the safety hazard of the power supply system; (2) Properly extend the filtering of the high-speed circuit breaker The time will violate the protection essence of high-speed circuit breakers, and the filtering time is difficult to determine; (3) The transformation of high-speed circuit breakers involves more substation equipment, which increases the difficulty of implementation and the expected cost

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