Method for calculating voltage fluctuation of power grid caused by rail traction shock load

A technology of impact load and grid voltage, which is applied in the field of electric power engineering, can solve problems such as three-phase load imbalance in the power system, achieve the effects of improving power quality, scientific and reasonable reactive power compensation capacity on the low-voltage side, and reducing the impact of grid impact
CN101699693AActive Publication Date: 2010-04-28JIANGSU KENENG ELECTRIC POWER ENG CONSULTING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU KENENG ELECTRIC POWER ENG CONSULTING
Publication Date
2010-04-28

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Abstract

The invention relates to a method for calculating the voltage fluctuation of power grid caused by rail traction shock load. The method is performed by applying a Power System Analysis Synthesis Package (PSASP) and comprises the following steps: 1) determining a load value on the high-voltage side of a traction station before a locomotive is started, inputting the load value into a power grid model for load flow calculation, and using a load flow calculation result as a basic load flow for transient stability calculation; 2) calculating reactive shock load values on the high-voltage side respectively when two locomotives on two arms of a traction transformer are started; and 3) applying the PSASP, stimulating reactive shock at a bus on the high-voltage side of the traction station and calculating the voltage fluctuation of a PPC point. The method has great significance for reducing the influence of the traction load on power grid shock and improving the power quality of a power system and the operating safety and stability of the power grid.
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Description

technical field

[0001] The invention belongs to the technical field of electric power engineering, in particular to a method for calculating voltage fluctuations of a power grid caused by railway traction impact loads. Background technique

[0002] The traction power of the electrified railway is an electric locomotive. The locomotive itself does not carry energy, and the required energy is provided by the electric traction power supply system. The traction power supply system mainly refers to the traction substation and catenary. The substation is located near the railway, and it sends the current from the power plant through the high-voltage transmission line to the catenary above the railway. Catenary is a device that directly transmits electric energy to electric locomotives. Along both sides of the railway line, a row of pillars is erected, with metal wires hanging from it, which is the catenary. The electric locomotive uses the pantograph on the roof to obtain elect...

Claims

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