Overview
IEC TS 62933-3-1:2018 is an IEC Technical Specification for electrical energy storage (EES) systems focused on the planning and performance assessment of grid‑connected EES installations (indoor or outdoor). It defines the general specification for required functions, performance test items and assessment methods, monitoring and data acquisition, and the information exchange and control capabilities needed for reliable integration with the grid.
Key topics and technical requirements
- Scope and system architecture
- Applicability to grid‑connected EES systems and typical subsystem architecture: accumulation, power conversion, auxiliary, and control subsystems.
- Planning and sizing
- Considerations for site environment, grid parameters at the point of connection (POC), service conditions, local regulations, and sizing recommendations (power rating and energy capacity).
- Main electrical parameters
- Specification and assessment of input/output power rating, rated energy capacity, auxiliary power consumption, self‑discharge, roundtrip efficiency and duty‑cycle efficiency.
- Functional performance
- Required control functions and operation states, including frequency support, islanding and black‑start capability, active power limitation, manual/pattern/automatic power control, and modes for voltage support.
- Communication and information exchange
- Information model for EES systems, remote monitoring and control message categories, and interfaces for supervisory control and data acquisition.
- Testing and verification
- Factory Acceptance Test (FAT), Installation/Commissioning, Site Acceptance Test (SAT), and ongoing performance monitoring phases and test items.
Practical applications
IEC TS 62933-3-1 is designed to support practical EES deployments, including:
- Frequency regulation and reserve services (primary, secondary, dynamic)
- Renewable integration: energy firming and power smoothing for wind and solar
- Grid support: voltage control (Q(U)), power quality, and peak shaving
- Microgrid and black‑start capabilities where islanding and fast control are required
Who should use this standard
- EES system designers and manufacturers (OEMs)
- Project planners and system integrators sizing and specifying storage
- Utilities and transmission/distribution operators integrating storage at POC
- Commissioning and testing laboratories performing FAT/SAT
- Regulators and procurement teams defining performance requirements
Related standards and implementation notes
- IEC TS 62933-3-1 is part of the IEC guidance on electrical energy storage; users should check related IEC documents and local grid codes for specific grid connection requirements and safety standards. Use this Technical Specification to ensure interoperable monitoring, predictable performance, and compliant control functionality when planning or assessing grid‑connected EES projects.
Keywords: IEC TS 62933-3-1:2018, electrical energy storage, EES systems, planning, performance assessment, grid‑connected storage, roundtrip efficiency, monitoring, FAT, SAT, power conversion, frequency control.