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    To perform dispatch control and electricity transmission functions, Ukrenergo operates and develops unique hi-tech facilities: overhead power transmission lines and 220-750 kV substations, transmitting billions of kWh of electricity across the country and abroad every year.

    Reliable performance of existing power transmission lines and substations is underpinned by a complex of operational, major overhaul, modernization and reconstruction works.

    Our technical reports include key quantitative, physical and cost indicators of major overhauls, modernization and reconstruction for main elements of power transmission lines, electrical substations, relay protection equipment, control communication equipment, etc.

    At the end of every year, we provide information regarding disturbance dynamics for the past decade and the number of disturbances at the company’s energy facilities for infrastructure sectors (power lines, substations, protection systems, etc.).

    OL length and service periods by voltage class (as of 31.12.2017)

    Voltage class Total, km Including lines in operation (years)(by links)
    by route by links under 25 25-30 30-40 over 40
    800 кВ 98,540 98,540 98,540
    750 кВ 4595,111 4595,111 692,650 272,720 2313,070 1316,671
    500 кВ 374,760 374,760 38,100 159,600 177,060
    400 кВ 338,950 338,950 338,950
    330 кВ 12972,379 13536,732 1396,846 435,848 2282,108 9421,930
    220 кВ 3019,385 3975,965 178,628 14,695 379,942 3402,700
    110 кВ 448,728 549,780 52,730 20,500 40,505 436,045
    35 кВ 112,441 114,051 21,318 12,530 17,400 62,803
    Total: 21960,294 23583,889 2380,272 756,293 5192,625 15254,699

    OL length and service periods by voltage class in power systems (as of 31.12.2017)

    PS Total, km Including lines in operation (years)(by links)
    by route by links under 25 25-30 30-40 over 40
    Dniprovska 4577,687 4956,897 394,998 577,984 775,933 3207,982
    Donbaska 1346,049 1856,599 114,456 11,459 298,377 1432,307
    Zakhidna 3418,860 3796,360 208,310 87,000 958,280 2542,770
    Krymska* 1274,823 1311,115 150,626 0,000 160,680 999,809
    Pivdenna 2581,818 2650,972 645,731 0,000 873,326 1131,915
    Pivdenno-Zakhidna 2259,870 2263,400 229,540 46,820 502,060 1484,980
    Pivnichna 3618,707 3852,736 150,181 12,530 964,889 2725,136
    Tsentralna 2882,480 2895,810 486,430 20,500 659,080 1729,800
    Total: 21960,294 23583,889 2380,272 756,293 5192,625 15254,699

    – because the Autonomous Republic of Crimea is temporarily occupied, the data on Krymska PS is provided as of 01.01.2014;

    – because the parts of Donetsk and Luhansk regions are temporarily uncontrolled, the data on Donbaska PS is provided as of 01.01.2017.

    OL length and service periods by voltage class (as of 31.12.2016)

    Voltage class Total, km Including lines in operation (years)(by links)
    by route by links under 25 25-30 30-40 over 40
    800 кВ 98,540 98,540 98,540
    750 кВ 4120,541 4120,541 218,080 411,600 2382,690 1108,171
    500 кВ 374,760 374,760 38,100 159,600 177,060
    400 кВ 338,950 338,950 338,950
    330 кВ 12862,389 13423,662 1276,368 798,278 2202,918 9146,098
    220 кВ 3019,385 3975,965 178,628 56,425 338,212 3402,700
    110 кВ 448,728 549,780 52,730 26,920 34,085 436,045
    35 кВ 112,441 114,051 21,318 12,530 17,400 62,803
    Total: 21375,734 22996,249 1785,224 1305,753 5134,905 14770,367

    OL length and service periods by voltage class in power systems (as of 31.12.2016)

    PS Total, km Including lines in operation (years)(by links)
    by route by links under 25 25-30 30-40 over 40
    Dniprovska 3993,740 4264,620 194,260 623,340 594,510 2852,510
    Donbaska 1346,049 1856,599 114,456 21,999 287,837 1432,307
    Zakhidna 3301,410 3678,910 90,860 100,100 1230,480 2257,470
    Krymska* 1274,823 1311,115 150,626 60,100 178,297 922,092
    Pivdenna 2581,818 2650,972 644,819 881,129 1125,024
    Pivdenno-Zakhidna 2259,870 2263,400 229,540 46,820 502,060 1484,980
    Pivnichna 4202,654 4545,013 344,903 432,894 680,592 3086,624
    Tsentralna 2415,370 2425,620 15,760 20,500 780,00 1609,360
    Total: 21375,734 22996,249 1785,224 1305,753 5134,905 14770,367

    *– due to temporary occupation of the Autonomous Republic of Crimea, the data for Krymska PS is used as of 31.12.2013

    OL length and service periods by voltage class (as of 31.12.2015)

    Voltage class Total, km Including lines in operation (years) (by links)
    by route by links under 25 25-30 30-40 over 40
    800 кВ 98,540 98,540 98,540
    750 кВ 4120,541 4120,541 218,080 594,790 2199,500 1108,171
    500 кВ 374,760 374,760 38,100 159,600 177,060
    400 кВ 338,950 338,950 338,950
    330 кВ 12862,489 13423,762 1432,928 1037,518 2153,139 8800,177
    220 кВ 3019,385 3975,965 161,868 56,425 338,212 3419,460
    110 кВ 453,828 559,980 52,730 26,920 34,085 446,245
    35 кВ 115,251 116,861 21,318 12,530 17,400 65,613
    Total: 21383,744 23009,359 1925,024 1728,183 4901,936 14454,216

    OL length and service periods by voltage class in power systems (as of 31.12.2015)

    PS Total, km Including lines in operation (years)(by links)
    by route by links under 25 25-30 30-40 over 40
    Dniprovska 3993,740 4264,620 367,930 569,340 602,830 2724,520
    Donbaska 3398,417 4045,947 453,939 199,663 495,830 2896,515
    Zakhidna 3301,410 3678,910 90,860 100,100 1230,480 2257,470
    Krymska* 1274,823 1311,115 150,626 60,100 178,297 922,092
    Pivdenna 2581,818 2650,972 610,949 83,490 858,429 1098,104
    Pivdenno-Zakhidna 2259,870 2263,400 229,540 46,820 502,060 1484,980
    Pivnichna 2158,296 2368,775 5,420 541,530 336,650 1485,175
    Tsentralna 2415,370 2425,620 15,760 127,140 697,360 1585,360
    Total: 21383,744 23009,359 1925,024 1728,183 4901,936 14454,216

    *– due to temporary occupation of the Autonomous Republic of Crimea, the data for Krymska PS is used as of 31.12.2013

    Number of substations by voltage class and rated capacity of automatic transformers and electrical transformers (as of 31.12.2017)

    Voltage class, kV Number of SS Rated capacity of AT and ET, MVA
    110 4 286,0
    220 33 9394,2
    330 88 48972,9**
    400 2 1609,0
    500 2 1753,0
    750 8 16613,0
    Total 137* 78753,1

    *17 substations are located in the temporarily occupied Autonomous Republic of Crimea, and another 17 substations in the areas temporarily uncontrolled by the Government of Ukraine;

    ** – the total capacity takes into account the autotransformer at SS-330kV “Myrhorod” with the capacity of 200 MVA, installed at the end of 2017 at the expense of “Pivdenna Zaliznytsia” but not reflected on the balance sheet of SE “NPC “Ukrenergo.”

    Number of substations by voltage class and rated capacity of automatic transformers and electrical transformers (as of 31.12.2016)

    Voltage class, kV Number of SS Rated capacity of AT and ET, MVA
    110 4 286,0
    220 33 9394,2
    330 88 *48897,9
    400 2 1609,0
    500 2 1753,0
    750 8 16613,0
    Total 137 78553,1

    * – including the 200 MVA automatic transformer at Myrhorod 330 kV SS, installed in 2007 at the expense of Southern Railway but not posted to Ukrenergo’s balance.

    Number of substations by voltage class and rated capacity of automatic transformers and electrical transformers (as of 31.12.2015)

    Voltage class, kV Number of SS Rated capacity of AT and ET, MVA
    110 4 286,0
    220 33 9394,2
    330 88 *48897,9
    400 2 1609,0
    500 2 1753,0
    750 8 16613,0
    Total 137 78553,1

    * – including the 200 MVA automatic transformer at Myrhorod 330 kV SS, installed in 2007 at the expense of Southern Railway but not posted to Ukrenergo’s balance.

    Consolidated major overhaul and ongoing repair indicators, 2017

    No Description Unit of measurement Quantity % of fulfilment
    1. Overhead power transmission lines
    1.1. Replacement of insulation Plan pc  9334 125
    Actual 11697
    1.2. Replacement of overhead earth wire Plan ton 157,4 103
    Actual 161,7
    1.3. Replacement of reinforced concrete pylons Plan pc 66 100
    Actual 66
    1.4. Route clearing Plan ha 1767,1 126
    Actual 2217,9
    2. SS equipment
    2.1. 220-750 kV automatic transformers Plan pc 7 114
    Actual 8
    2.2. 35-100 kV  transformers Plan pc 3 133
    Actual 4
    2.3. 220-750 kV circuit breakers Plan pc 60 100
    Actual 60
    2.4. 110-154 kV circuit breakers  Plan pc 176 101
    Actual 178
    2.6. Compressors Plan pc 84 100
    Actual 84
    2.7. Batteries Plan pc 5 100
    Actual 5
    3. Repair costs Plan thousands UAH 207158,0 100
    Actual 207158,0

    Consolidated major overhaul and ongoing repair indicators, 2016

    No Description Unit of measurement Quantity % of fulfilment
    1. Overhead power transmission lines
    1.1. Replacement of insulation Plan pc 9815 181
    Actual 17782
    1.2. Replacement of overhead earth wire Plan ton 161,1 101
    Actual 163,2
    1.3. Replacement of reinforced concrete pylons Plan pc 69 100
    Actual 69
    1.4. Route clearing Plan ha 1996,5 119
    Actual 2374,4
    2. SS equipment
    2.1. 220-750 kV automatic transformers Plan pc 3 100
    Actual 3
    2.2. 220-750 kV circuit breakers Plan pc 57 100
    Actual 57
    2.3. 110-154 kV circuit breakers  Plan pc 162 101
    Actual 164
    2.4. 35 kV circuit breakers Plan pc 56 104
    Actual 58
    2.5. 6-10 kV circuit breakers Plan pc 120 103
    Actual 123
    2.6. Compressors Plan pc 115 101
    Actual 116
    2.7. Batteries Plan pc 2 100
    Actual 2
    3. Repair costs Plan thousands UAH 235779,6 82
    Actual 193944,1

    Consolidated major overhaul and ongoing repair indicators, 2015

    No Description Unit of measurement Quantity % of fulfilment
    1. Overhead power transmission lines
    1.1. Replacement of insulation Plan pc 13607 117
    Actual 15895
    1.2. Replacement of overhead earth wire Plan ton 157,2 102
    Actual 160,8
    1.3. Replacement of reinforced concrete pylons Plan pc 69 100
    Actual 69
    1.4. Route clearing Plan ha 2134,1 131
    Actual 2786,0
    2. SS equipment
    2.1. 220-750 kV automatic transformers Plan pc 4 100
    Actual 4
    2.2. 35-154 kV transformers Plan шт. 1 100
    Actual 1
    2.3. 220-750 kV circuit breakers Plan pc 70 107
    Actual 75
    2.4. 110-154 kV circuit breakers Plan pc 173 113
    Actual 196
    2.5. 35 kV circuit breakers Plan pc 66 111
    Actual 73
    2.6. 6-10 kV circuit breakers Plan pc 149 104
    Actual 155
    2.7. Compressors Plan pc 86 103
    Actual 89
    2.8. Batteries Plan pc 1 100
    Actual 1
    3. Repair costs Plan thousands UAH 205332,0 82
    Actual 168141,3