JSC NIIPT

Saint Petersburg, Russia

JSC NIIPT

Saint Petersburg, Russia

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Lubkov A.N.,JSC NIIPT | Privalov I.N.,JSC NIIPT
Power Technology and Engineering | Year: 2011

A procedure for the diagnostics of the insulation of high-pressure oil-filled 220 kV and 500 kV cable lines approved for use in hydroelectric power plant is presented. The results of the diagnostics and estimation of the residual life of the insulation of such cables, which have been operating for a considerable time in the Toktogul'skaya, Nizhnekamskaya and Bratskaya hydroelectric power plant, are presented. © 2011 Springer Science+Business Media, Inc.


Burmistrov A.,JSC Power Machines | Popov E.,NPP Ruselprom Electromash | Urganov A.,North West State Technical University | Gerasimov A.,JSC NIIPT | Esipovich A.,JSC NIIPT
44th International Conference on Large High Voltage Electric Systems 2012 | Year: 2012

UPS of Russia is a unique power system. Its operating conditions are quite different in comparison with power systems of other developed countries. In such operating conditions excitation control of synchronous generators plays not only technological role, but also is used as a powerful tool of voltage regulation and emergency automation for the security of reliability and survivability of power system. That's why in the power system of Russia special demands to the excitation control and in particular to the automatic voltage regulators and power system stabilizers are operating. According to the demands operating in UPS of Russia, all prototype models of excitation automatic controllers before installation in power system should pass the functioning tests according to the standard program approved by the key institutions of the power industry. In the report the conclusion about efficiency of an AVR certification technique applied in Russia, which ensures checking of a hardware representation of control law and allows to eliminate bugs of algorithmic and program character, is performed. The realized technique of certification of automatic excitation controllers in the conditions of physical model of power system and criteria of their efficiency estimation will be disputed during the meetings of IEC Maintenance Team No. 12 Excitation systems for synchronous machines (revision of the IEC 60034-16 series).


Koshcheev L.A.,JSC NIIPT | Shul'Ginov N.G.,JSC so EES
Power Technology and Engineering | Year: 2011

DC power transmission from the Leningradskaya Nuclear Power Plant (LAÉS) to city of Vyborg is proposed. This will provide a comprehensive solution to several important problems in the development and control of the unified power system (EÉS) of Russia. © 2011 Springer Science+Business Media, Inc.


Balyberdin L.L.,JSC NIIPT | D'Yachkov V.A.,JSC so EES | Kapitula Yu.V.,JSC NIIPT | Lozinova N.G.,JSC NIIPT
Power Technology and Engineering | Year: 2011

A new device-a dc multimodule fuse (DCMF)-and a method of using it to limit short-circuit currents in the networks of large cities are proposed. Future short-circuit currents for the power system of the Moscow region are estimated, and from the results of investigations the optimum position for inserting the DCMF is found. It is shown that the use of the DCMF to limit short-circuit currents is more effective compared with using ordinary fuses and resonance-type devices. © 2011 Springer Science+Business Media, Inc.


Korovkin N.V.,JSC NIIPT | Frolov O.V.,JSC NIIPT | Ivanova E.A.,JSC NIIPT | Shishiguin S.L.,Vologda State Technical University
IEEE International Symposium on Electromagnetic Compatibility | Year: 2012

Calculations for earthing devices (ED) are formulated as chain-field-like problems. The chain-field model of ED, computing techniques and software (AutoCAD application) have been developed, the program makes possible the solution of the problems related to EMC of electric power substations. © 2012 IEEE.


Kutuzova N.B.,JSC NIIPT
Power Technology and Engineering | Year: 2011

The environmental effects of dc overhead transmission lines are examined. The major effects of ac and dc transmission lines are compared. Dc lines have advantages compared to ac lines in terms of electrical safety for people under the lines, biological effects, corona losses, and clearance width. © 2011 Springer Science+Business Media, Inc.


Kapitula Y.V.,JSC NIIPT
Power Technology and Engineering | Year: 2014

The functioning of selective protection of a DC overhead cable transmission line when modeling short circuits at different points of the line is verified. It is shown that the developed algorithm of the selective protection of a line is capable of revealing short circuits on the line, taking into account the non-zero transition resistance at the short-circuit location, determining the location of the damage and generating an appropriate disconnection signal. © 2014, Springer Science+Business Media New York.


Ivanova E.A.,JSC NIIPT | Mazurov M.I.,JSC NIIPT
IEEE International Symposium on Electromagnetic Compatibility | Year: 2012

In the article the standardization of the disturbing interference of DC line harmonic currents is considered. The effectiveness of the methods of higher harmonic component suppression for mixed direct current transmission media consisting of overhead line and cable is analyzed on the example of LAES-2-Viborgskaya station HVDC transmission system. It is shown, that increasing of the smoothing reactor inductance isn't an efficient measure to reduce harmonic components levels, especially when quite strict ratings for telephone interference are established. Scheme of passive double frequency filter is offered and its parameters are calculated; such filter enables to considerable reduction of psophometric current throughout the dc line length; the effectiveness of the higher harmonic component suppression of the passive filtering device in conjunction with active part is estimated. Special feature of harmonic component suppression in composite direct current line is noted. © 2012 IEEE.


Frolov O.,JSC NIIPT | Shershnev Y.,JSC NIIPT | Gurevich M.,JSC NIIPT | Megretskiy K.,JSC CKB ME Rubin | And 2 more authors.
WIT Transactions on Ecology and the Environment | Year: 2014

The development of offshore fields is supported by drilling and production equipment which requires high performance and a reliable power supply. Russian offshore fields that can be developed using subsea technologies are located at up to 650 km from onshore infrastructures under extreme ice conditions. Requirements for the equipment capacities of power supplies may vary from dozens of kilowatts to hundreds of megawatts. It has been recognized that these days one of the most reliable and safe techniques for powering subsea oil and gas facilities is power transmission from an onshore power supply source through a subsea cable. Different systems of high voltage power supply have been considered: direct high voltage current transmission, alternating current and low frequency alternating current transmission. They have been compared in terms of loss minimization during power transmission and conversion, and the provision of reliability and safety of unattended operating. It has been concluded that high voltage direct current transmission at long distances ensures the sufficient reduction of cable losses as compared to alternating current transmission, but subsea DC-AC conversion (as subsea equipment usually uses alternating current) requires the development of a subsea converter. © 2014 WIT Press.


Frolov O.V.,JSC NIIPT | Shershnev Y.A.,JSC NIIPT | Gurevich M.K.,JSC NIIPT
44th International Conference on Large High Voltage Electric Systems 2012 | Year: 2012

Overhead lines (OHL) damages caused by ice coat on conductors represent a serious problem in many countries (Canada, Kazakhstan, Ireland, China, Iran etc.). Russia suffers all the more. Our experience has shown that along with perfection of designing of the overhead lines (application of new designs of towers, foundations and wires), other effective and quickly implemented action is de-icing the conductors by regulative direct current by means of controlled ice melting rectifiers (CIMR). This kind of equipment is very useful at OHL tooled up with ice sensor system. We use CIMR since 1994. Several types of CIMR with the nominal output voltage from 8 kV to 50kV and the maximal current up to 1600A have been designed to fit the parameters of particular OHL to be de-iced. Rated up to 14 kV CIMRs are designed as containerized equipment with closed forced air-cooling system. Such containerized CIMR can be easily mounted at outdoor substations. All types of CIMR are completed with developed microprocessor control, protection and automatics system (CPAS) which provides connection with various ice sensors and automatic process control system of the substation. By present time the most demanded are installations rated on 14kV of direct voltage and the heating current of 1200A or 1600A, which is marked CIMR-14/1200(1600). These rectifiers are able to melt ice both on phase conductors of the overhead line of voltage classes 110-500kV and on lightning-protective cables. Series connection of two CIMR-14/1200(1600) is possible. As a result the output voltage reaches 28kV and it becomes possible to accomplish de-icing on twice long OHL. Parallel connection of several CIMRs is also reasonable. All types of CIMR include power block which is installed inside the container, and microprocessor system of control, protection and automatics (CPAS) block which can be placed in any heated space in the distance up to 300 m from the container. The power block represents a classical three-phase thyristor rectifier. Forced air moving inside the container is produced by 42 fans located at the back sides of six thyristor stacks. Cooling is provided by specific common airline, formed by additional walls and floor. It's important that corrugated container's walls serve as heat dissipation surfaces. Due to such constructional design it is possible to use standard transport 20-foot container as a framework, a cooler and a case at the same time. Containerized equipment, placed in outdoor part of substation, stands all specific Russian weather conditions. Six thyristor stacks-shoulders are controlled through high-frequency high-voltage cables. by pulse formers mounted to ground potential. Thyristor control unit, located on the each thyristor potential, feeds pulse of complex form with the forced part and a long track current which guarantees a steady operation of the converter in all modes, including intermittent current mode. CPAS feeds put-on and put-off for CIMR and complex of different protections both of inner CIMR-equipment and other equipment of ice-melting system. CPAS works as from automatic process control system of substation signals, so from inner CIMR sensors.

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