The projects aimed at achieving the energy transition are increasing the strain on electricity distribution networks, as electric vehicles, heat pumps, and battery storage systems require higher power outputs. Simultaneous network usage is also increasing. To prevent power outages and ensure security of supply, control mechanisms for network operators are necessary. These mechanisms allow the power consumption of high-power devices to be reduced when needed.
Without such control instruments, delays in the provision of grid connections could occur. Power increases for devices such as wallboxes or heat pumps might otherwise not be approved by grid operators. The new control instruments inevitably also change the communication between market participants. These changes are described below.
The three main topics of MaKo 2024
1. Section 14a EnWG
This paragraph specifies the control of technical resources (heat pumps, charging stations, etc.) via intelligent meters or smart meter gateways. The technical and controllable resources must be reflected in market communication.
2. API web service interface
Within the universal ordering process, the newly introduced API web services must be used for the procedural handling of control actions. This only occurs in the use case of a control command from the network operator or supplier to the metering point operator.
3. AS4 (Applicability Statement 4)
To ensure the secure and rapid transmission of EDIFACT messages, the transition of market communication from email to AS4 was initiated on October 1, 2023. Communication via the AS4 protocol must be fully implemented by April 1, 2024. The AS4 protocol is based on AS2 and OASIS ebMS 3.0 (Electronic Business Messaging Service).
Which formats are changing? An overview.
API web services:
-Will be newly introduced on 01.04.2024
-Mandatory for the universal ordering process
Regelungen zum Übertragungsweg:
AS4 is usable from 01.10.2023 and mandatory from 01.04.2024.
-EDIFACT transmission instead of via email, using direct communication between market partners
GPKE, MaBiS, WiM and MPES are affected
Regulations regarding the transmission path for AS4 2.1:
AS4 may be used for redispatch EDIFACT messages if the market participants agree.
Market participants must be verified by a CA (Certificate Authority) instead of the PARTIN.
MSCONS:
-Test identifier and quantity specification for energy quantities were added to determine the price ceiling.
– Segments and conditions in the case of correction energy quantities adjusted and removed
Code lists of article numbers and article IDs:
-By integrating controllable resources, article IDs were added for all existing constructs.
-With the entry into force of the law on restarting the digitalization of the energy transition, all article IDs will be adjusted according to the new MsbG.
-Correct description regarding converter
Decision tree diagrams and code lists:
– Bug fixes for GPKE, WiM and gas blocking processes
-The addition of new article IDs necessitates new verification steps.
-Due to the amendment of the MsbG, the chapter “Billing of metering point operation to the NB” is required.
INVOIC / REMADV:
-Billing for metering point operation with iMS is being expanded
-Incorrect segment names have been corrected.
PRICAT:
Price lists can be transmitted by the MSB to the NB from 01.04.2024.
-The instructions have been adapted to reflect verifiable prerequisites.
UTILMD MaBiS AHB:
-Elimination of the “settlement model” segment in master data synchronization, as the TSO no longer holds or processes this information.
UTILMD GAS MIG:
-New transaction reasons, as basic/substitute suppliers are informed of the reason why MaLo falls into EoG
-The operating status of the MaLo must be reported.
-The RFF segment is omitted, as only one MaLo is ever communicated in the GAS sector.
UTILMD GAS AHB:
-Die Segmente Daten der Marktlokation fallen weg, diese Daten werden nicht übertragen
-Extension to ensure customer value determination when transferring standard load profile
-Adjustment due to transmission of max. one MaLo
UTILMD STROM MIG:
-New transaction reason (market location not relevant for accounting purposes)
-New verification identifiers for MSB billing data
The MSB category must be known.
-Technical and controllable resources must be communicated
UTILMD STROM AHB:
-Technical resources do not possess master data in these use cases and therefore do not require a segment.
(Adjustments for better integration and transparency of technical resources according to Section 14a of the German Energy Industry Act (EnWG).)
-New use cases and adjustments for MSB billing data
The MSB category must be known.
-Adjustments for the metering point operator (MSB) to know the annual consumption forecast (APR) of the network operator (NB) if consumption data for the market location is not yet available for three years.
-Changes in the area of master data synchronization, as the TSO no longer maintains or processes the settlement model
-Introduction of the assignment to a counting time register to enable correct allocation of the concession fee.
-Removal of code Z52 from the use cases, as a switching time definition cannot exist at a market location.
-Adjustments so that the MSB still receives master data even if it cannot request it in a specific segment group.
UTILITS MIG:
-Version change
-Adjustments for feed-in tariff holders with PV systems due to the EEG (Renewable Energy Sources Act)
UTILITS AHB:
-Version change
-Adjustments for feed-in tariff holders with PV systems due to the EEG (Renewable Energy Sources Act)
CONTROL/APERAK AHB:
-Specific usage restrictions have been added for certain codes, relating to the application of these codes in specific scenarios.
-Further changes relate to the transmission of work and performance values in the case of mid-year supplier changes at market locations whose accounting basis is RLM.
PARTIN MIG
-The target address for communicating the successful setup of a control command according to GPKE III is included in process steps 4, 5 and 6 of chapter 5.1.1 UC: Control command from the network operator or supplier to the metering point operator.
PARTIN AHB:
-Removal of specific lines from the PARTIN related to the AS4 communication parameter, as the exchange of certificates takes place exclusively via the directory services.
-The target address for communicating the successful setup of a control command according to GPKE III is included in process steps 4, 5 and 6 of chapter 5.1.1 UC: Control command from the network operator or supplier to the metering point operator.
What’s next for MaKo 2024?
The format change on April 1, 2024, addresses three main topics. Due to the diverse applications of renewable energies and increased possibilities for consuming and storing them, future adjustments will be solidified around Section 14a of the German Energy Industry Act (EnWG).
Die Umsetzung zum Paragraf 14a EnWG bietet den Grundbaustein für den Einsatz von technischen und steuerbaren Ressourcen.
The implementation of Section 14a of the Energy Industry Act (EnWG) provides the basic building block for the use of technical and controllable resources.
