The entities participating in the Balancing Market shall be categorized into Balancing Service Entities and Balance Responsible Entities. The Balancing Service Entities shall be represented by Balancing Service Providers, while the Balance Responsible Entities shall be represented by the Contracted Balance Responsible Parties.

The Balancing Service Entities shall be entitled to provide Balancing Energy and/or Balancing Capacity and shall include the following categories:

a) Dispatchable Generating Unit,

b) Dispatchable RES Units Portfolio,

c) Dispatchable Load Portfolio.

The Dispatchable RES Units Portfolios are categorised into Non-Intermittent RES Units Generation Portfolios with no technology distinction and Intermittent RES Generation Units Portfolios, based on the technology of the facilities. RES Units that are in Commissioning Operation status are not eligible to participate in Dispatchable RES Units Portfolio.

The Dispatchable RES Units Portfolios and the Dispatchable Load Portfolios have a minimum allocated capacity of 1 MW. The following are registered in the HETS Operator Registry in separate portfolios:

a) Dispatchable Load,

b) Dispatchable Non-Intermittent RES Generation Units,

c) Dispatchable Intermittent RES Generation Units with wind farms,

d) Dispatchable Intermittent RES Generation Units with photovoltaics,

e) Dispatchable Intermittent RES Generation Units with small hydroelectric plants.

Contracted Generating Units are also included among the Entities, but are not referred to in paragraph 2 of this Article since they do not participate in the Balancing Market procedures. The Contracted Generating Units shall provide additional services in any situation that may lead to the load and/or reserve requirements not being covered during the Integrated Scheduling Process (ISP), following conclusion of a relevant contract, as stipulated in the HETS Grid Code.

Balance Responsible Entities are those entities that assume responsibility for imbalances created and include the Balancing Service Entities referred to in paragraph 2 of this Article as well as the following entities:

a) Non-Dispatchable RES Units Portfolio, 

b) Load Portfolio,

c) RES Units Portfolio without Market Participation Obligation,

d) Import Portfolios and Export Portfolios, excluding the Cross-Border Physical Deliveries corresponding to imports and exports under the coupled interconnection within the framework of the Single Day-Ahead Market Coupling (SDAC), Intraday Auctions, and Continuous Intraday Trading, as calculated in the results of the Single Day-Ahead Market Coupling, Intraday Auctions, and Continuous Intraday Trading, respectively.

Cross-Border Physical Deliveries corresponding to imports and exports through coupled interconnections within the framework of Single Day-Ahead Market Coupling, Intraday Auctions, and Continuous Intraday Trading, as calculated in the corresponding results of the Single Day-Ahead Market Coupling, Intraday Auctions, and Continuous Intraday Trading, respectively, shall be declared to the HETS Operator in accordance with the provisions of the HETS Grid Code and the contract concluded between the HETS Operator and the Shipping Agent.

The HETS Operator shall keep a Balancing Market Generating Units Registry for the registration of the Dispatchable Generating Units that have successfully completed the relevant pre-qualification tests described in the Technical Decision “Process and Prequalification Tests for BSPs”.

The information included in the Balancing Market Generating Units Registry and any supporting documents required for registration therewith are described in detail in the Technical Decision “Procedures of Registration with the HETS Operator Registry”.

The Producer is obliged to immediately notify the HETS Operator of any modification in the Generating Unit data entered in the Balancing Market Generating Units Registry.

For a power generation unit which has a valid production license, is located on the mainland or on the interconnected islands and has an installed capacity over 5 MW to be put in the Commissioning operation or to perform pre-qualification tests, the unit must have been pre-registered with the Balancing Market Generating Units Registry.

Each Producer is obliged to immediately notify the HETS Operator of any changes in the data held in the Balancing Market Generating Units Registry. The HETS Operator shall determine whether any upcoming change in the technical characteristics of the Unit requires the repeat execution of prequalification tests for the Unit, as defined in the Technical Decision ‘Process and Prequalification Tests for BSPs’. The Producer shall again pay 50 % of the registration fee applicable to Balancing Service Entities for the execution of new prequalification tests.

Dispatchable Generating Units shall be deleted from the Generating Units Registry when they permanently cease to operate, as arising from the relevant decision of the RAEWW.

As regards Dispatchable Auto-producer Units, Dispatchable HECHP Units, Dispatchable Units with Alternative Fuel and Dispatchable Multi-Shaft Combined Cycle Units, the provisions of this Rulebook relating to Dispatchable Generating Units shall apply, unless otherwise expressly stated.

The HETS Operator shall keep a Dispatchable RES Units Portfolio Registry for the registration of the Dispatchable RES Units Portfolios that have successfully completed the relevant pre-qualification tests described in the Technical Decision “Process and Prequalification Tests for BSPs”.

The information included in the Dispatchable RES Units Portfolios Registry and any supporting documents required for registration therewith are described in detail in the Technical Decision “Procedures for Registration with the HETS Operator Registry”.

Each RES Producer/RES Aggregator is obliged to immediately notify the System Operator of any changes in the data held in the Dispatchable RES Units Portfolios Registry. The HETS Operator determines whether any upcoming change in the technical characteristics of the Portfolio requires the re-performance of prequalification tests for the Portfolio, either in whole or in part, as defined in the Technical Decision “Process and Prequalification Tests for BSPs”. To conduct the new prequalification tests, the Aggregator or the RES Producer pays again 50 % of the registration fee as applicable for Balancing Service Entities.

For a Dispatchable RES Units Portfolio to be put in Commissioning operation or to undergo pre-qualification tests, the Portfolio must have been pre-registered with the Dispatchable RES Units Portfolio Registry. During the pre-registration, DAPEEP enters the under testing portfolios in the Table of RES and CHP Units, which it maintains and notifies to the HETS Operator in accordance with the provisions of the RES & Guarantees of Origin Operator Code.

Each Dispatchable RES Units Portfolio is required to participate separately in the Day-Ahead Market and the Intra-Day Market.

The HETS Operator shall keep a Dispatchable Load Portfolio Registry for the registration of the Dispatchable Load Portfolios that have successfully completed the relevant pre-qualification tests described in the Technical Decision “Process and Prequalification Tests for BSPs”.

The information included in the Dispatchable Load Portfolios Registry and any supporting documents required for registration therewith are described in detail in the Technical Decision “Procedures of Registration with the HETS Operator Registry”. The Aggregator of Dispatchable Load Portfolios submits, together with the registration documents, a technical report stating, under the responsibility of the Aggregator, the technical readiness for the provision of Balancing Services.

Each Response Demand Aggregator and each Consumer participating in the Balancing Market as Balancing Service Provider is obliged to immediately notify the HETS Operator of any changes in the data held in the Dispatchable Load Portfolios Registry. The HETS Operator determines whether any upcoming change in the technical characteristics of the Portfolio requires the re-performance of prequalification tests for the Portfolio, either in whole or in part, as defined in the Technical Decision “Process and Prequalification Tests for BSPs”. To conduct the new prequalification tests, the Demand Response Aggregator or the Consumer pays again 50% of the registration fee as applicable for Balancing Service Entities.

Each Dispatchable Pumped-Storage hydro Generating Unit shall be a distinct Dispatchable Load Portfolio. The Producers representing the above Units are obliged to immediately notify the HETS Operator of any changes in the data held in the Dispatchable Load Portfolios Registry.

Placement of a Load Portfolio with Demand Response capability under commissioning operation or under execution of prequalification tests requires prior registration in the Dispatchable Load Portfolio Registry.

The HETS Operator maintains a Table of Meters for the Dispatchable Load Portfolios, which clearly indicates the meters of the loads included in each Portfolio of the Demand Response Aggregator, as described in the Technical Decision “Procedures of Registration with the HETS Operator Registry”. The HETS Operator sends the above table to HEDNO for the purposes of the settlement procedure.