This paper cites results of thermal testing of various types and designs of power-generating gas-turbine plants (GTP), which have been placed in service at electric-power stations in Russia in recent years. Thermotechnical and ecological indicators are codified and compiled for their characteristic regimes when operating on natural gas and liquid fuel. The operational economy is evaluated for the GTP on the whole, and operating characteristics are given for their components -compressor, turbine, and combustion chamber. The operating conditions of the GTP are examined for variable regimes, including a regime where a forward channel is used for the compressor. A comparative analysis is performed on the variation in the indicators of type-V94.2 GTP with allowance for their long-term operation.

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An electronic three-phase fully fiber-optic measuring voltage transformer (FOVT) of accuracy class 0.2 for a nominal voltage of 220 kV with a digital output for operation at power system facilities, including electrical substations, is described. The operation principle of the device is based on the use of a longitudinal linear electro-optical effect (Pockels effect) for measuring AC voltage. The fiber-optic measurement scheme based on low-coherent interferometry is connected via a fiber cable to an optical high-voltage primary converter (HVPC) with an electro-optical crystal placed in it; there are no additional voltage dividers inside. The digital signal processing unit (DPU) contains optical and electronic circuits for generating, detecting, and processing an electro-optical signal. FOVT has a digital interface that complies with the IEC 61950-9-2 LE standard, and can be used as a component for the Digital Substation and Smart Power Grid technologies. The design features of the HVPC and the DPU are described and the results of the metrological characteristics of FOVT-220, based on the data obtained during the certification and pilot operation at the 220 kV electrical substation, are presented.

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