In the end,it discussed the protection system of DC voltage-stabilized source and put forward the principles of protection system design and the measure of the whole machine protecting.

In the new historical conditions,research on the overall protection of the surrounding environment of historical and cultural heritages has gradually become the key content catching people\'s eyes.

These problems caused by TA saturation,station transformer protection,excessive excitation inrush current and protection setting are analyzed in theory respectively,and the corresponding technical measures are proposed.

While equipment being changed, dispatching is special; testing the new equipment needs temporary protection setting and operation mode.

A discussion of protection setting of AT feeder line with short distance in electrification railway is given in this paper.

By analyzing the cases of Bologna historic centre and Shanghai Xintiandi district,and contrasting the modes of integrated conservation which attach more importance to humanism factor with the mechanism of development which attach more importance to commercial benefit,the paper takes a reconsideration of the mode which deserves an excessive attention,and the metho.