[> Read the report (pdf).]
MCRs have been produced in Russia and the Commonwealth of Independent States since 1976, and have been used more and more widely without problems since their first implementation.
More than 40 MCRs are in current operation, and installation results have been dramatic.
At Permenergo's Kudymkar Substation, for example, a grid had been experiencing wild power fluctuations and had required over 800 switching events per year, with serious capital outlay for labor and in rapid depreciation of the switching equipment.
An MCR was installed in 1999, and the system immediately stabilized.
There has been only one switching event per month since then, the substation has saved an average of 2.5 MW during peak hours i.e., 5.5 GW-hours per year.
Moreover, construction of a new power line has become completely unnecessary for the next 8 years saving the utility well in excess of $25M, even in Russia's economy (it would be more then three times this amount in America).
Thus, MCR's significantly reduce costly system power losses, increase the operational reliability of electrical grids and optimize power-line operating conditions and automatically minimize manual events and switching operations at line substations.
Also, rated-condition internal power losses are about half those of comparable TCR-and-transformer systems. Yet MCRs are as simple to maintain as regular transformers, and consequently, fewer, or at least no additional substation personnel are required for their operation.
Read Permenergo's report (pdf).