- With the development of civilization, the electric power industry became more and more an infrastructure industry. This is especially evident in the life of modern cities. Electricity is on a par with water, air and sunlight.
- Disruption of power supply to cities and industrial centers is accompanied by dangerous consequences for human life and health. Here is how the accident in Moscow on May 23-26, 2005 is described: “Despite the end of the heating season, it officially brought enormous losses of up to $ 70 million. Many enterprises stopped in the Moscow, Ryazan, Kaluga and Tula regions. All Moscow transport was paralyzed. Not only the metro carrying the bulk of passengers didn’t work, but the movement of road transport was disrupted, because traffic lights, gas stations didn’t work. They froze the water supply, hot water supply, and sewage system, since I have pumps of these devices electric drive. Not working outlets. stop the elevator. Urban life is virtually paralyzed. It’s good that are not logged in Moscow in mass usage electronic locks and locks apartments. Otherwise, the Muscovites could not get into their apartments. ”
- An analysis of such accidents allows us to conclude that the damage from a power outage far exceeds the cost of preventing them.
- Obviously, the reliability at the level of absolutely uninterrupted power supply to all city facilities is impossible. Therefore, certain short-term repayments of a part of power receivers are inevitable due to short circuits and other accidental failures of power equipment. High-category power consumers must have individual protection and redundancy from such failures. In general, the network bandwidth should provide power flows in normal and post-accident conditions when individual network elements are disconnected. The choice of the power supply network scheme depends on specific conditions: load density and growth rate; quantity and characteristics of power sources; historical existing network scheme, etc.
- On average, in the city, industry accounts for about 70% of total electricity consumption, domestic consumers – 11%, transport – 7%, water supply and sewage – 5%, consumers with small motor load – 7%. The reasons for the recognized high energy intensity of our economy lie in the high energy consumption of industrial enterprises, in the cost of production of which there is a large share of energy costs due to the high energy intensity of the main equipment, inefficient energy consumption, general obsolescence of equipment and its physical deterioration. So, for example, in the chemical industry, the share of energy costs can reach 40%, for engineering – 6-15%. In the direction of preventing accidents and reducing power consumption, it is necessary to work already at the design stage of the facility. The main goal of the design work is the rational organization of power supply to the customer’s building. Calculation of the power supply project should not limit the owner in the operation of the object planned by him, but all material costs should be optimized. The design of power supply should be calculated with the prospect of development of the facility. The designer himself cannot know about the customer’s plans for the purchase and installation of this or that equipment in the future, therefore the main task of the customer of the power supply project is to determine his plans as accurately as possible and inform the designer about them.
- Currently, when designing power supply systems, much attention is paid to intelligent protection, automation and control devices installed at the facilities. In this direction, devices of the MRZS series manufactured by the state-owned enterprise PO Kyivpribor have proved to be excellent. Recently, they have been installed in distribution points at such facilities in Kiev as the Toronto business center, Comforttown, Ocean Plaza shopping center, Euroformat-PPM, French Quarter LCD, Housing estates in Poznyaki and Troieschyna and in a number of residential buildings (Klovsky Uzviz St., Reunification Ave, Obukhovskaya St., etc.)
- They attract customers with high reliability, a wide range of functions, relatively low cost and, what is extremely important, free repair. In none of the facilities did the functioning of the MRSA devices cause any complaints about operation, especially since these devices have long been familiar to Kyivenergo specialists.
Improving energy supply efficiency can go, for example, in three directions
- The first direction is the creation of a new electric network with an increased level of voltage. Distribution city networks are carried out at a voltage of 10 kV. Voltages of 6 and 35 kV for use in urban networks are not recommended for technical and economic reasons. Energy consumption of cities is growing steadily, which requires the construction of new facilities. At the same time, the construction of new substations and distribution points is difficult due to the significant cost of land allocated for the construction site, and in most cases it is even impossible due to the lack of required space and architectural requirements within the city.
The experience of European countries, such as Poland, France and Germany, where an electrical network with a voltage level of 20 kV is introduced and exists, shows the effectiveness of such a solution.
An important component of an electric network of 20 kV should be the construction of relay protection and automation, telemechanization and supervisory control on principles and approaches that are different from a 10 kV network. These requirements are met by the MRZS-D device manufactured by SE Kyivpribor Production Association, the first among domestic devices that fully meets the requirements of relay protection and automation equipment in 20 kV networks.
Second direction – automation of the power supply system, including the development of automated process control systems for the electrical part of substations, the automated process control system of the enterprise, registration of emergency events, and organization of monitoring the quality of electric energy throughout the power supply system.
The previously mentioned devices of the MRZS series fully fulfill the task of recording emergency events, and, combined into a local ACS network, allow solving other tasks of automation of the power supply system. In addition, there is a promSCADA automated control system installed by NVP Promavtomatika, which is initially oriented to work with devices of the MRZS series and is designed specifically for automation of power supply systems.
Third Direction – Smart Grid.
- Currently, in the context of the development of information technology and an innovative economy, the intellectualization of technological equipment, facilities, energy systems and their management is becoming a promising base in the energy sector. Today, new conceptual provisions for the development of the electric power industry are studied and formed, corresponding to new goals and functioning trends using modern methods and controls. The new management concept, known abroad as the “smart” (Smart Grid) system, is a logical consequence of the evolutionary development of energy engineering and technology. The strategic goal of creating smart energy supply systems in large cities is the ability to maintain the most reliable, safe and cost-effective mode of operation of the system at any real time and under any changing external and internal conditions of its functioning. The main provisions of the innovative intellectual and technological development of power supply are as follows:
- reassessment of traditional modern energy technologies from the perspective of progressive information innovations, global automation and robotization of management processes;
- wide and deep diagnostics of equipment, monitoring the status of equipment and systems;
- the gradual transformation of managed objects and their environment into “digital reality”, regulated by intellectual resources, including artificial intelligence.
- To accomplish these tasks, the MRZS series devices use data transmission and control according to the IEC 61850 standard, designed specifically for organizing SmartGrid systems in power supply.
- The listed areas are only part of ways to improve energy supply efficiency. In any case, without the use of innovative solutions and modern intellectual technology in the matter of electricity supply now can not do.
New smart device designs
- At the Elcom2017 exhibition, a new fourth generation of MRZS series protections produced by the Kievpribor production association was presented. The fourth generation is distinguished by its modular design and the ability to increase hardware resources with the help of additional easily installable blocks, a significant improvement in application software and the expansion of the range of supported communication protocols.
- Typical solutions, binding schemes, recommendations for calculating settings and maintenance, etc., have been developed for MRZS devices. The company’s specialists provide warranty and post-warranty technical support to customers, take part in installation and commissioning. Corresponding MRZS series training courses have been developed and are being conducted.