【政策法规】ENIEC62933-2-1-2018储能系统.第2-1部分：单元参数和试验方法.通用规范

Summary of IEC 62933-2-1:2017 - Electrical Energy Storage (EES) Systems - Part 2-1: Unit Parameters and Testing Methods - General Specification

Core Content

IEC 62933-2-1:2017 is a standard that provides general specifications for the unit parameters and testing methods of Electrical Energy Storage (EES) systems. It outlines the key parameters that define the performance of EES systems and specifies the testing procedures to ensure compliance with these parameters. The document is part of a series that includes a vocabulary standard (IEC 62933-1) and other parts that address specific applications and testing requirements.

Main Purpose

The standard focuses on defining and testing the basic unit parameters of EES systems, which are essential for ensuring their functionality, reliability, and performance in various applications. It does not cover energy storage devices and technologies, which are the subject of other parts of the series.

Key Parameters

• Nominal energy capacity: The energy that can be output by the system at the point of connection (POC) under standard testing conditions.
• Input and output power rating: The power that the EES system can absorb or provide at the POC for a specified duration, categorized into active, reactive, and apparent power.
• Roundtrip efficiency: The ratio of output energy to input energy, expressed as a percentage.
• Expected service life: The anticipated operational lifespan of the EES system, expressed in years or duty cycles.
• System response: Includes step response time and ramp rate, which are critical for evaluating the system's ability to respond quickly to changes in demand or supply.
• Auxiliary power consumption: The power used by auxiliary subsystems during operation.
• Self-discharge: The energy loss of the EES system over time when not in use.
• Rated voltage and frequency range: The operational voltage and frequency limits of the system.

Testing Methods

• Parameter tests:

  • Actual energy capacity test: Measures the system's energy output under standard conditions.
  • Input and output power rating test: Evaluates the system's ability to handle specified power levels.
  • Roundtrip efficiency test: Determines the efficiency of energy storage and retrieval.
  • Expected service life test: Assesses the long-term performance of the system.
  • System response test: Measures step response time and ramp rate.
  • Auxiliary power consumption test: Evaluates the energy used by auxiliary components.
  • Self-discharge test: Determines the rate at which energy is lost when the system is not in operation.
  • Rated voltage and frequency range test: Verifies the system's operation within specified limits.

• Performance tests:

  • Class A applications: Focus on frequency regulation, fluctuation reduction, and voltage regulation.
  • Class B applications: Focus on peak shaving and peak shifting.
  • Class C applications: Focus on back-up power supply during emergencies.

• System implementation tests:

  • Visual inspection
  • Continuity and validity of conductors
  • Earthing test
  • Insulation test
  • Protective and switching device test
  • Equipment and basic function test
  • Grid connection compatibility test
  • Available energy test
  • EMC immunity test

Classification of EES Systems

EES systems are classified based on their application into three main categories:

• Class A: Short-duration applications requiring rapid power input/output, such as frequency regulation, fluctuation reduction, and voltage regulation.
• Class B: Long-duration applications for peak shaving or peak shifting, which help in managing energy demand and improving grid efficiency.
• Class C: Emergency back-up power applications, providing power to critical systems during outages without relying on an external source.

Environmental and Testing Conditions

• Reference environmental conditions:

  • Ambient air temperature: ≤ 40 °C (indoor and outdoor)
  • 24-hour average temperature: ≤ 35 °C
  • Minimum temperature: -5 °C (indoor), -10 °C (outdoor), -15 °C (indoor), -25 °C (indoor), -40 °C (outdoor)
  • Solar radiation: negligible for indoor, ≤ 1000 W/m² for outdoor
  • Altitude: ≤ 1000 m
  • Relative humidity: ≤ 95% (no condensation)
  • Atmospheric pressure and condensation/precipitation conditions are also considered.

• Standard testing conditions:

  • Ambient air temperature: 25 °C
  • Altitude: ≤ 1000 m
  • Humidity: ≤ 95% with no condensation

Notes and Additional Information

• The standard is harmonized with European standards (EN) and is approved without modification by CENELEC.
• The document is based on the IEC Technical Committee TC 120's work on EES systems.
• The use of this standard requires attention to potential patent rights.
• The document includes informative annexes for additional details on testing procedures and duty cycles.

Conclusion

IEC 62933-2-1:2017 provides a comprehensive framework for defining and testing the unit parameters of EES systems. It ensures that systems are designed and evaluated to meet the requirements of different applications and environmental conditions, promoting consistency and reliability in the electrical energy storage industry.