In a nutshell
- The Application Rule standardizes the collaboration between up-and down-stream network operators in critical grid situations
- A functioning operational and informational cascade is prerequisite for reliable system operation
During critical grid situations and according to the Energy Industry Act (EnWG), network operators can request supportive measures from downstream network operators within the scope of a “cascade”. The safe and reliable functioning of this cascade is a fundamental prerequisite for maintaining a reliable system operation.
Consequently, the "Cascading Measures for the System Safety of Power Grids" (VDE-AR-N 4140) Application Rule lays down important foundations. The VDE.Application Rule describes the collaboration of network operators if system safety is at risk or disrupted. The goal of the Application Rule is to optimize the operational and informational cascade which must be triggered in critical grid situations across all network levels.
The document describes in detail the collaboration between network operators, technical solutions to implement the cascade, the information exchange between network operators as well as maximum response times from those involved in the cascade. In addition, it includes specifications for communication, documentation and monitoring as well as standardized forms to facilitate the communication.
