Research On 1200MW Turbine Generator Negative-sequence Operation

Thermal power generation, nuclear power generation and natural flow generation are still the main way to produce the energy, Although we are trying our best to develop the wind power generation solar electrical energy generation, turbogenerator is absolutely necessary to transformate mechanical energy into power energy at present. All the eighty percent power energy is provided by turbonator,so the development of national economy is so closed related with the development of turbogenerator.Modern power system is made up of large power generation, large turbogenerator and high voltage,,so our revenue is to make the big power net and large turbogenerator work together in harmony and bing down the accident probability.The mathematical models and methods for predicting the coupled eddy and the temperature field arising from negative sequence current in a turbogenerator, and the distribution of the eddy current and temperature fields of a 1200MW turbogenerator are studied.Firstly, a series of mathematical models and methods for numerical analysis of the eddy current and thermal fields are developed based on the finite element method,with the goal of proving flexible computation tools for engineering application.Secondly, by comparing the advantages and disadvantages of different solution methods of coupled physical fields, the sequential analysis method is employed in the proposed study, and the corresponding mathematical models for coupled negative sequence eddy current-temperature field developed.In the final, the eddy current and temperature fields of a 1200MW turbogenerator are studied, and some useful conclusions are drawn.