National Statistical Institute
|Contact organisation unit|
Environmental and Energy Accounts Department
|Contact person function|
|Contact mail address|
2, P. Volov str., 1038 Sofia, Bulgaria
|Contact email address|
|Contact phone number|
+359 2 9857 621
|Contact fax number|
|Metadata last certified||23 July 2021|
|Metadata last posted||23 July 2021|
|Metadata last update||23 July 2021|
The indicators Capacity, highly effective production of electricity and heat, fuel inputs and number of CHP units are observed as data are presented by type of combined cycle and in compliance with the methodological guidelines:
|Statistical concepts and definitions|
Maximum electrical capacity (gross and net), Maximum net heat capacity, Electricity production (gross and high effective combined), Useful heat production, Fuel inputs for high effective combined production, Number of CHP units.
Enterprises licensed for cogeneration of electricity and heat.
High effeciency CHP plants.
For the territory of the Republic of Bulgaria.
|Unit of measure|
MWh, MW, TJ, t, 1000 m3
|Legal acts and other agreements|
Directive 2012/27/EC on energy efficiency that replaced the Directive 2004/8/EC.
Data is provided to Eurostat.
|Confidentiality - policy|
|Confidentiality - data treatment|
Individual data are not published in accordance with article 25 of the Law on Statistics. The publishing of individual data can be performed only in accordance with article 26 of the same law.
The date for publication of statistical information is listed in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. Statistical data are published until the end of April of the 2-nd year following the reported one.
|Release calendar access|
The calendar is available on the website of NSI: https://www.nsi.bg/en/node/480
Statistical data are published on the NSI website, section Energy in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers.
|Frequency of dissemination|
|Accessibility and clarity|
Detailed results are available to all users of the NSI website under the heading Environment and Energy -Energy - Combined heat and power units as well as in IS INFOSTAT at the following links:
|Documentation on methodology|
The Annexes I and II to Directive 2012/27/EC on energy efficiency that replaced the Directive 2004/8/EC.
NSI has developed and implemented an Integrated Information Quality and Security Management System (ISM) in accordance with the international standards ISO 9001: 2015 and ISO / IEC 27001: 2013:
The implementation of ISM includes: Management Regulation, Procedures, Instructions, Information Security Policies, Risk Assessment Methodology, ISM Training, Reports, Audit. The NSS quality assurance framework includes methods and tools that aim to ensure compliance with the requirements for statistical processes and products and to ensure the necessary quality of statistical information:
The data are nationally representative and comparable to other countries, as the Eurostat methodology is applied.
Have not been studied.
Data are provided for all licensed companies with CHP.
|Accuracy and reliability|
Data are representative for the country.
|Timeliness and punctuality|
Data from the respondents are received 4 months after the reporting year. The analysis, verification and preparation of representative for the country CHP data is carried out by the end of April of the 2nd year after the reporting one.
The deadline for publication in compliance with Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute is observed.
|Coherence and comparability|
|Comparability - geographical|
Data are representative at national level, as required by the methodology.
|Comparability - over time|
Data across time series are calculated by one methodology and are fully compatible.
|Coherence - cross domain|
|Coherence - internal|
Data are compared with the Decisions of the Energy and Water Regulatory Commission (EWRC) on the issuance of certificates of origin for electricity produced from CHP inuts.
|Cost and burden|
Costs related to the collection and production of statistics on CHP data are announced annually in the National Statistical Programme.
No specific surveys on the burden of respondents.
|Data revision - policy|
|Data revision - practice|
Statistical survey by a specific Questionnaire for heat and electricity production of CHP units, included in the National Statistical Programme.
|Frequency of data collection|
Data collection by a form in Excel format, received by email.
The primary data are compared with the data from previous periods, other surveys on Energy Statistics and the EWRC Decisions on the issuance of certificates of origin for electricity produced from CHP units.
Data are aggregated at national level.
Download in SDMX 2.1 file format: COMBINED HEAT AND POWER UNITS (CHP UNITS) - fuel inputs, high efficiency production and capacity of CHP units
Metadata Structure Definition in SDMX 2.1: ESMS_MSD+BNSI+2.0+SDMX.2.1.xml
Download in SDMX 2.0 file format: COMBINED HEAT AND POWER UNITS (CHP UNITS) - fuel inputs, high efficiency production and capacity of CHP units
Metadata Structure Definition in SDMX 2.0: ESMS_MSD+BNSI+2.0+SDMX.2.0.xml