IEC 61400-25-4:2016

Overview

IEC 61400-25-4:2016 is part of the IEC 61400-25 series for communications for monitoring and control of wind power plants. This part specifies normative mappings of the IEC 61400‑25 information and exchange models to specific protocol stacks, enabling interoperable data exchange between a client and a remote server in wind energy generation systems. The standard defines how to encode messages for data access/retrieval, device control, event reporting and logging, publisher/subscriber patterns, device self‑description (device data dictionary), data typing and discovery.

Key protocol mappings covered (normative):

• SOAP‑based Web Services
• OPC/XML‑DA
• IEC 61850‑8‑1 (MMS / ISO 9506)
• IEC 60870‑5‑104
• DNP3

Edition and scope notes:

• Edition 2.0 (2016) - harmonized with IEC 61400‑25‑2 (information models) and IEC 61400‑25‑3 (information exchange services).
• Focus on reducing overlap and simplifying implementation by increased cross‑referencing.

Key Topics

• Protocol stack mappings: Concrete definitions showing how IEC 61400‑25 information objects and services map to each target protocol (SOAP, OPC XML‑DA, MMS, IEC 60870‑5‑104, DNP3).
• Information model alignment: Harmonization with IEC 61400‑25‑2 to ensure consistent naming, data typing and structure across mappings.
• Service mapping: Mapping of services for data read/write, control actions, reporting (buffered and unbuffered reports), logging and event handling.
• Device self‑description: Mechanisms for retrieving device data dictionaries and discovering data types.
• Interoperability focus: Guidelines to enable SCADA systems, controllers and vendor equipment to interoperate using standard communication profiles.

Applications

• Integration of wind turbines and sub‑systems into SCADA and asset‑management systems using standard protocols.
• Mapping IEC 61400‑25 information models to legacy or common utility protocols (IEC 60870‑5‑104, DNP3) for retrofit projects.
• Implementing publisher/subscriber and event reporting services across heterogeneous wind farm networks.
• Enabling OEMs, system integrators and operators to exchange typed device data and logs consistently.

Who Uses This Standard

• Wind farm operators and owners
• SCADA engineers and system integrators
• Turbine and control system manufacturers (OEMs)
• Protocol gateway and middleware vendors
• Test laboratories and certification bodies working on interoperability

Related Standards

• IEC 61400‑25‑2 (Information Model)
• IEC 61400‑25‑3 (Information Exchange Services)
• IEC 61850‑8‑1 / ISO 9506 (MMS)
• IEC 60870‑5‑104 and DNP3 (utility/legacy protocols)

Keywords: IEC 61400-25-4, wind power plant communications, protocol mapping, SOAP web services, OPC/XML-DA, IEC 61850-8-1 MMS, IEC 60870-5-104, DNP3, SCADA interoperability, device data dictionary.