Abstract:

Multiple singlecore cables are used to connect a gas turbine generator outlet and a main transformer lowvoltage side during samephase parallel operation. There is overtemperature and overrated current in cables due to uneven current distribution and high induced voltage, which poses a large safety hazard.Thus,an optimization strategy of multiple  output cables samephase parallel operation for gas turbine generators is proposed. Firstly, main causes of the overtemperature cable of the gas turbine generator are analyzed in depth. Secondly, the optimization model of the multiple singlecore cables between the gas turbine generator and the lowvoltage side of the main transformer in samephase parallel operation is constructed, and the model is solved by particle swarm optimization. Changing the arrangement of cables from the generator outlet to the main transformer lowvoltage side can effectively address the uneven current distribution and high induced voltage of the multiple singlecore cables in samephase parallel operation. Finally, the typical case of a Tianjin gasfired distributed power station is studied.The results show that optimizing the crossing layout of five outphrase cables can distribute the current of each cable evenly, so as to guide the design and operation of the parallel operation of the singlecore cables of generators.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">gas turbine generator, multiple cables samefont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">phase parallel, cables, current distribution, optimization strategy, distributed energy