19 октября 2017
«ЭЛЕКТРОЭНЕРГИЯ. Передача и распределение» № 5(44), сентябрь-октябрь 2017
СТРАТЕГИИ И ПЕРСПЕКТИВЫ
СТРАТЕГИИ И ПЕРСПЕКТИВЫ
УПРАВЛЕНИЕ СЕТЯМИ
УПРАВЛЕНИЕ АКТИВАМИ
УПРАВЛЕНИЕ АКТИВАМИ
ЭНЕРГОЭФФЕКТИВНОСТЬ
ЭЛЕКТРИЧЕСКИЕ СЕТИ 20 КВ
ВОЗДУШНЫЕ ЛИНИИ
КАБЕЛЬНЫЕ ЛИНИИ
РЕЛЕЙНАЯ ЗАЩИТА И АВТОМАТИКА
ОБОРУДОВАНИЕ
ОБОРУДОВАНИЕ
ДИАГНОСТИКА И МОНИТОРИНГ
МИРОВОЙ ОПЫТ
TABLE OF CONTENTS
GUEST OF THE ISSUE
Less talk, more action
EVENTS
Repair or replacement?
Volga region power engineers are the best in the CIS
Winners of “Energoproryv-2017” competition are determined
Metrologists and producers talk about participation in the interstate standards development
INNOVATIONS
New tasks of PJSC “ROSSETI” innovative development
New possibilities for cable lines diagnostics
STRATEGIES AND PROSPECTS
Power engineering problems in Russia and some suggestions for their solution
Abstract.
Some problems of backbone and distribution networks of Russia are considered. The “bottlenecks” are shown with specific references and suggestions for their elimination are given. It is pointed out that the main problems are related to distribution electric grids, which are the technological basis for the emerging retail electricity market.
Keywords:
electric grids, backbone electrical networks, distribution electrical networks, efficiency of operation and development
Online monitoring systems development as a condition for improving the reliability of the Russian electric power industry
GRID CONTROL
The problems of determining the time of events occurrence in technological information systems of distribution electrical networks
Abstract.
The paper considers the organization of maintaining single time in automated systems of energy facilities. These facilities provide technological events recording as well as processing and analyzing of incoming energy data for electric power distribution management and commercial and technical accounting. Such facilities as step down substations distributed in the region and dispatching centers of layered control system are among important and sophisticated elements of any utility. The features of time synchronization in heterogeneous systems, ways of single time distribution over the communication channels and collection of information about connection between time and events occurring in technological equipment are considered.
Keywords:
automated system, correct time, power facility, communication channels, energy data
ASSET MANAGEMENT
Development of automated process control system for operating-technical and situational management of Moscow Cable Networks electrical grids
Sequencing of 0.38-20 kV distribution networks overhaul according to technical condition
ENERGY EFFICIENCY
Energy saving when transmitting electric power through 0.38 kV lines with asymmetrical load Kosoukhov F.D., Vasilev N.V., Filippov A.O.,
Boroshnin A.L., Gorbunov A.O.
Abstract.
The paper presents research, design and development works performed with the aim of increasing efficiency of energy saving and power quality in 0.38 kV electrical networks with asymmetrical load. “Electric power losses” computer program and method for calculating power losses, electric power losses and voltage and current unbalance indexes in 0.38 kV electrical networks with distributed asymmetrical load have been developed. Invention patents have been received for all afore-mentioned developments. All developments are innovative.
Keywords:
energy saving, electric power transmission, three-phase electrical network, asymmetric load, symmetrical components of current, load balancing filter device, computer program
20 KV ELECTRICAL GRIDS
Scheme for 20 kV electrical networks development in Moscow for the period until 2030
Abstract.
The conceptual issues of the scheme for 20 kV electrical networks development in Moscow are considered. The design concepts of existing network as well as parameters, state and current load of the main equipment are determined. Integrated characteristics are calculated. Two options of load growth estimates for different scenarios of economic growth are developed. Also, an analysis of forecasts accuracy for previous development schemes is conducted. Measures for power losses reducing in the electrical network are proposed. The volume of necessary financing is determined until 2030.
Keywords:
distribution networks, power supply scheme, forecast of power consumption growth, energy losses
OVERHEAD TRANSMISSION LINES
Structural features of 20 kV overhead lines with low resistance neutral grounding
Abstract.
20 kV overhead systems with low resistance neutral grounding are considered (such systems are new among home-grown technologies). The justification and calculation of necessary single-phase ground current for providing electrical network reliability and efficiency are presented. The influence of various factors on the target current value is shown (the target current has different values for cable and overhead systems). Recommendations on the structure and parameters of 20 kV electrical network are given.
Keywords:
20 kV overhead systems, structure and parameters, low resistance neutral grounding, relay protection and automation, grounding devices of electrical installations, personnel safety
CABLE LINES
Influence of modern trends of urban distribution networks development on transfer potentials
in a low voltage network
Abstract.
In recent years, a significant number of articles have been published on the negative impact of XLPE cables on transfer potentials. Also, the transfer of medium voltage distribution networks on the low-resistance grounding has been the subject of discussion. In view of the fact that low-resistance grounding (as compared to insulated/ inductive neutral grounding) as well as XLPE cables (instead of cables with paper-oil insulation) are considered to be effective modern solutions for urban cable distribution networks, a study for developing recommendations to calculate the transfer potentials in a low voltage electrical network was conducted, and analysis of measures to prevent the transfer of hazardous potentials in the network was executed.
Keywords:
cable distribution network, XLPE insulation, neutral grounding
Polymer pipes as an important part of the cable system
While on this subject…
RELAY PROTECTION AND AUTOMATION
Centralized relay protection of 110/35/6 kV substation based on the principles of protection algorithms integration in a single device. Experience of application at JSC “Tyumenenergo”
EQUIPMENT
110 kV gas insulated switchgears serial production in «ZETO — Gazovye Tekhnologii», LLC
SKB EP, LLC instruments at the Interregional personnel competitions for PJSC “FGC UES” substations equipment maintenance and repair
JSC “UNECO” summed up the results of the project for transformer substations artistic design
TESTING
Mechanical testing as a new business line for “TsKSI”, LLC
DIAGNOSTICS AND MONITORING
Non-destructive methods for 20 kV electrical equipment technical condition monitoring. Experience of PJSC “Lenenergo”
Technical diagnostics of electrical equipment
INDUSTRIAL INJURIES
Save somebody’s life!
STAFF TRAINING
Platov South-Russian State Polytechnic University (NPI) turns 110
GLOBAL EXPERIENCE
Important events in world power systems operation and development in August-September 2017
JOURNEY THROUGH THE PAST
Three fourths of million volts
Underground transmission lines — light above Moscow