Yearly Report on the Operation of the Czech Electrical Grid 2018
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Yearly Report on the Operation of the Czech Electrical Grid 2018 Statistics and Quality Monitoring, ERO, Prague 2019 2018 Table of Contents General information and commentary 1 Abbreviations, acronyms and explanations page 3 2 Commentary on the year under review page 4 Electrical energy balances, generation and consumption 3.1 Electrical energy balances ‒ generation page 5 3.2 Electrical energy balances ‒ consumption page 6 3.3 Development of electrical energy balances and generation page 7 3.4 Year-on-year change in electricity generation page 8 3.5 Fuels and technologies used in gross electricity generation page 9 3.6 Development of electricity generation and consumption page 10 3.7 Year-on-year change in electricity consumption page 11 3.8 Long-term development in electricity generation and consumption page 12 3.9 Development of electricity consumption by demand category page 13 Electricity generation and consumption in Czech Regions and regional distribution companies 4.1 Gross electricity generation in Czech Regions by generating technology page 14 4.2 Net electricity consumption in Czech Regions by demand category page 14 4.3 Net electricity consumption in Czech Regions by national economy sector page 15 4.4 Year-on-year change in net electricity consumption by national economy sector page 16 4.5 Fuels and technologies in gross electricity generation in Czech Regions page 17 4.6 Net electricity consumption in each RDS page 18 4.7 Year-on-year change in net electricity consumption in regional distribution systems page 19 Electricity generation by technology and fuel 5 Nuclear power plants and thermal power stations page 20 6 Combined cycle plants page 21 7 Gas fired power stations page 22 8 Hydroelectric, including pumped storage, power stations page 23 9 Wind power plants page 24 10 Photovoltaic plants page 25 11 Combined heat and power generation (cogeneration) page 26 12 Generation from biomass page 27 13 Generation from biogas page 28 14 Development of gross electricity generation from renewable energy sources page 29 Installed capacity 15 Development of installed capacity and breakdown by Czech Regions page 30 Cross-border flows 16.1 Cross-border physical flows page 31 16.2 Year-on-year change in cross-border physical flows page 32 16.3 Development of cross-border physical flows page 32 Maximum and minimum loads 17.1 Grid peak load day page 33 17.2 Grid minimum load day page 34 17.3 Monthly maximum and minimum loads in the Czech grid (gross w/o pumping at PSHE) page 35 17.4 Gross consumption w/o pumping at PSHE on the days of the annual peak and minimum page 36 Balances, technical details and supply quality in RDS and tariff statistics 18 Balances of physical flows in the TS and RDS page 37 19 Lengths of routes and lines in the TS and RDS page 38 20 Supply points and transformers in the TS and RDS page 39 21 Development of key technical details about the TS and RDS page 40 22 Development in the electricity supply quality page 41 23 Tariff statistics for 2017 page 42 24 Development in the tariff statistics page 43 Additional graphs and map 25 Additional graphs page 45 26 Map page 48 Page 2 of 48 1 Abbreviations, acronyms and explanations BDMW biologically degradable municipal waste CAIDI Customer Average Interruption Duration Index in the period under review CC combined cycle plants CHP combined heat and power generation DS distribution system DSO distribution system operator EHV extra high voltage over 52 kV (under the ČSN 330010 standard) [≈ high voltage] GFPS gas fired power stations HD_C high demand customers HE hydroelectric power stations HV high voltage from 1 kV to 52 kV (under the ČSN 330010 standard) [≈ medium voltage] LD_B low demand customers, businesses LD_C low demand customers LD_H low demand customers, households LDS local distribution system LV low voltage up to 1 kV (under the ČSN 330010 standard) NPP nuclear power plants PSHE pumped storage hydroelectric power stations PV photovoltaic plants RDS regional distribution system RES renewable energy sources SAIDI System Average Interruption Duration Index in the period under review SAIFI System Average Interruption Frequency Index in the period under review TPS thermal power stations TS transmission system TSO transmission system operator WPP wind power plants Balancing difference = Gross electricity generation + cross-border balance - national gross consumption (NGC) Cross-border balance = Net balance of cross-border exchanges of electrical energy in a given period. It is the difference between total electricity imports and total electricity exports in a given period. A positive value denotes electricity imports exceeding exports, and a negative value denotes electricity exports exceeding imports. Electricity consumption in the Czech Republic = NNC - OU h Gross load = The hourly value of electrical power supplied to the Czech electrical grid by connected electricity producers + net balance (it is shown with and without the value of pumping power at pumped storage hydroelectric power stations) Installed capacities = Installed capacities reflect the capacities actually connected in the transmission system and the distribution systems, i.e. the figures do not reflect the sum of the licences awarded for the respective category of electricity generation Local consumption = Consumption of producers and entities directly connected to the respective generating plant National gross consumption (NGC) = NNC + consumption for pumping at PSHE + total losses + OU e National net consumption (NNC) = HD_C at the EHV level + HD_C at the HV level + LD_H + LD_B + consumption of the TSO and DSOs + local consumption + OU h Gross electricity generation = Total electricity available at generator terminals Net electricity generation = Gross electricity generation minus OU e Own use (process only) for electricity generation (OUe) = This expression denotes the consumption of electricity that is required for the electricity generating process. It covers all operations that are crucial for electricity generation, including losses in electricity generation. The definition is based on ‘process own use’ specified in Section 2(u) of Act No 165/2012, on supported energy sources and amending certain laws, as amended. Own use (process only) for heat production (OUh) = Analogous to OU e Total losses = Losses in distribution system operators’ and the transmission system operator’s networks Page 3 of 48 2 Commentary on the year under review 2018 Under Section 17 (7) (m) of Act No 458/2000 as amended (the Energy Act), the Energy Regulatory Office (ERO) publishes the Yearly Report on the Operation of the Czech Electrical Grid for 2018. All data is based on information received from licensees. This Report follows up on the yearly reports released in preceding years and provides information about the electricity industry’s key statistics for 2018, including their development over the past ten years. Its respective chapters contain statistics on electrical energy balances for January to December 2018, and the development of electricity generation and consumption by category, including renewable energy sources (RES) and combined heat and power generation (CHP). The Report also contains an overview of the installed capacities in the Czech electrical grid, cross-border electricity flows, and some Region-specific evaluations. The Report also provides more details about the consumption of the various fuels, broken down by power plant technology and also by Region. A new feature of the Report is tables and charts illustrating year-on-year changes and tariff statistics. The Yearly Report for 2018 is based on the data in the report for 4Q 2018 and contains some data that is more accurate. In 2018, gross electricity generation totalled more than 88 TWh, up by almost 1 TWh (+1.1%) on 2017. The largest electricity quantity was produced in March, 8,448 GWh; one of the reasons was higher demand due to colder weather. The largest year-on-year change in gross electricity generation in fuel-fired power stations was registered in nuclear power plants, up by 1.6 TWh (+5.6%). On the other hand, gross electricity generation declined by 361 GWh (-0.8%) in thermal power stations, by 32 GWh (-0.8%) in combined cycle plants, and by 29 GWh (-0.8%) in gas-fired power stations. While electricity generation from brown coal increased by 756 GWh (+2.0%), generation from hard coal dropped by 999 GWh (-22.4%) year-on-year. Generation from natural gas increased by 100 GWh (+2.9%) compared with 2017. Electricity generation in pumped-storage hydroelectric power stations dropped by 120 GWh, i.e. down by 10.2% year-on-year. Gross electricity generation from renewable energy sources decreased by 214 GWh (-2.2%) year-on-year and totalled 9,404 GWh. At the same time, national gross consumption is continuously rising and the share of gross electricity generation from renewable sources in total consumption dropped to 12.7%. Generation from biologically degradable municipal waste (BDMW) also decreased, specifically by 14 GWh (-12.3%). As regards renewable electricity generation, the largest increase was registered for photovoltaic plants, by 146 GWh (+6.7%), while their installed capacity almost did not change. Wind power plants produced 18 GWh more, while their installed capacity rose by 8 MW (+2.6%). The largest year-on-year change in generation was registered for hydroelectric power stations, a drop by 241 GWh (-12.9%) with an unchanged installed capacity. While electricity generation in large hydroelectric power stations declined by 6.6% year-on-year, small hydroelectric power stations experienced a significant drop in generation by 187 GWh (-17.6%). National gross electricity consumption continued to grow slightly and in 2018 amounted to 73.9 TWh (+0.2%), the highest value over the time it has been monitored in ERO’s yearly reports. Consumption only increased in the segment of high demand from EHV (high voltage), up by 76 GWh (+1.0%), and in the segment of high demand from HV (medium voltage), up by 455 GWh (+1.9%).