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In 2019, two energy districts of Yakutia were connected to the Unified Energy System of Russia
Since January 1 of 2019, the Central and Western energy regions of the Republic of Sakha (Yakutia) have been connected to the Unified Energy System of Russia with the inclusion of the East in parallel with the Unified Energy System (ECO). The republic’s southern energy district “outstripped” other territories of Yakutia: it entered the UES back in 1980.
Now the Unified Energy System of the East includes 27 power plants with a capacity of up to 2010 MW, power lines 110 – 500 kV with a total length of more than 33 thousand km. The total installed generation capacity of the UES of the East is 11 230 MW. The operating area of the ODU (Joint Dispatch Office of the Vostok Energy System) covers the territories where more than five million people live.
According to the results of the 2018 year, the power plants of the East UES generated 37 645 million kWh of electricity. Consumption amounted to 34 197 mln kWh In 2019, these figures will obviously increase, because now two energy regions of Yakutia have also entered the UES of the East.
More reliable doesn't mean more.
The Western and Central energy districts of the Republic of Sakha include 17 uluses (districts) and two cities. 730 thousand people live on this territory, or 71% of the region’s population. Thus, starting this year, 82% of the region’s consumers (including the previously connected South Yakutsk energy district) are already connected to the Unified Energy System in the republic. Such a large-scale event took place in the Far East for the first time in the last 30 years. Before, the East UES was so significantly expanded only in the 1990 year with the accession of the Sovgavan energy district of the Khabarovsk Territory.
Yakutia has become the 79-m subject of Russia, included in the Unified Energy System. Until that moment, the power supply to the Central Group of Regions came from the Yakutsk State District Power Station and State District Power Station-2, as well as the Yakutsk State District Power Plant. Western - from Vilyui and Svetlinskaya hydroelectric power station. The total installed capacity of these generation facilities is 1519 MW. In January 2019, PJSC Yakutskenergo, a subsidiary of PJSC RusHydro, transferred the authority for operational dispatch control to this system operator of the Unified Energy System.
“At the same time, all power equipment, both generating and network, remained in Yakutskenergo. But the Generation mode is now set by the System Operator - specialists in this case use the term "technical synchronization". The sales function also remained with Yakutskenergo. For consumers, no changes (when it comes to financial and organizational aspects) have occurred. The only difference is that the work of both Yakutskenergo and the System Operator is planned and coordinated in a new way, ”explained Alexander Sloik, Director General of PJSC Yakutskenergo.
Perhaps the only and most important change that consumers have felt is that energy supply in the region has become more reliable. Now, if necessary, the Central and Western energy regions of the republic can be provided with electricity due to the flow of capacities from the South Yakutia energy district or the Amur energy system. In turn, when necessary, the generating facilities of the Central and Western energy districts of Yakutia provide electricity and capacity to the UES of the East. This year, thanks to such overflows from Central Yakutia, for example, operational repairs of generating equipment of the Neryungri State District Power Plant became available.
Taking into account the connected power districts, the annual volumes of electricity supply increased by 2,5 times and, according to the forecast for 2019, amounted to 3 million kWh, the annual purchase plan is 757,5 million kWh.
“The most significant and most understandable to the consumer effect is a radical increase in the reliability of power supply. This is especially true for the central part of our republic, where the main consumption is not industrial, but household, primarily in the city of Yakutsk, ”says Alexander Sloik. - Until recently, technological violations that occurred on generating equipment in an isolated mode of operation of the Central Energy District, led to the disconnection of consumers. For example, in 2018, 11 facts of temporary interruptions in power supply were noted for this reason. In 2019 there were three cases with a disconnection of generating equipment, but there was no de-energization of consumers: it helped to transfer power from the UES of the East. The same result is in the Western region: a hypothetical shutdown of any hydro generator of the Vilyui hydropower cascade or Svetlinsk hydroelectric power station will not lead to a disconnection of consumers. ”
Changes were also appreciated by industrial consumers: high-quality energy supply affects productivity and, ultimately, reduces the costs of enterprises. In addition, for industrialists, the electricity tariff was reduced due to access to the wholesale energy market of the Far East. The cost of electricity for legal entities is calculated monthly, based on its parameters on the basis of formulas and components approved by the State Committee for Pricing Policy of the Republic of Sakha (Yakutia). Price categories differ in the terms of application of the tariff for electricity transmission services. The consumer chooses one of six price categories independently.
Connections will get stronger
To make the accession of the Central and Western energy districts to the UES of the East possible, a lot of work and serious investments were required: the total cost of the project amounted to 19 billion rubles. It was implemented in several stages.
From 2015 to 2018, 220 kV transits were built along the routes “Nizhny Kuranakh - NPS-15 - Olekminsk” and “Nizhny Kuranakh - Tommot - Maya” with substations 220 kV “Tommot” and “Maya”. To connect the Maya substation to the distribution network of the Central Energy District, Yakutskenergo constructed the approaches of the existing 110 kV transmission lines with the formation of a double-circuit cable-overhead line (KVL) along the routes Maya - Tabaga, Maya - Churapcha, Maya - Borogontsy, Maya - Nizhny Bestyakh.
It should be noted that the energy transit of the Neryungrinskaya GRES-Nizhny Kuranakh-Tommot-Maya route, built by FGC UES, is the largest in Russia. Its length is 756 km. All power facilities were prepared for work in difficult climatic conditions of Yakutia.
Of course, the objects did not work overnight: for several years they were tested. In 2016, a historic event for the domestic energy industry took place: for the first time, tests were conducted to turn on the parallel synchronous operation of the UES of the East and the Western energy district of the Yakutsk energy system. And in the spring of 2018 of the year, a full-scale experiment was carried out, which confirmed: if necessary (for example, in the event of an accident), it is guaranteed that the power supply to consumers of the Central Energy District of Yakutia from the UES of the East can be restored by transferring the interface between them. The accession of the energy districts to the UES of the East, which took place in 2019, once again proved the correctness of all calculations - not in an experimental manner, but in everyday work.
“We went a long way towards this. For many years, the energy infrastructure of Yakutia was isolated, and we all remember very well what problems any emergency outages in our villages and cities caused us. Joining the UES of the East is a historic event that the region was waiting for, - said the head of Yakutia, Aisen Nikolaev, at the ceremony of introducing a new energy supply scheme, held in May 2019 at the Maya substation. He stressed that improving the reliability of energy supply is extremely important in and of itself, and especially for Yakutia, with its climatic conditions. ”
FGC UES continues to work on creating additional links between the energy regions of Yakutia and UES of Russia. In 2019, the construction of the 220 kV Sukhoi Log substation and an 248 km-long power transmission line extending from it to the Western energy district is nearing completion. This will ensure its stable connection with the power system of Siberia - together with the facilities already built: the substation 500 kV Ust-Kut, the overhead line 220 kV Tira - Nadezhdinskaya and the reconstructed substation 220 kV Taksimo.
According to the Federal Law “On Electric Power Industry” adopted in 2003, the management of the UES of Russia is carried out by the System Operator. This allows to introduce uniform work standards in different constituent entities of the Russian Federation, unify hardware and software, and establish almost instant information exchange at all levels. This approach makes it possible to quickly respond to any emergency situations, to ensure the transfer of capacities from one part of the power system to another in the event of an accident, which means that, as a result, the power supply to consumers is as reliable as possible.