Analysis of a Retrofit for PT Secondary Circuit of 220 kV Busbar
The paper analyzes the problem of excessive voltage drop in the secondary circuit of potential transformers(PT),identifies the basic reasons for the excessive voltage drop and proposes countermeasures.The voltage drop data be-fore and after the modification of the PT secondary circuit of the 220 kV busbar shows that the modification can signifi-cantly improve voltage drop.Theoretical analysis and calculation show that this modification measure can recover consider-able economic losses for power enterprises.
voltage transformersecondary circuitvoltage dropexcessiveeconomic losses
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