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Standards Development
This proposal provides technical requirements for the hardware in the loop testing (HIL), commissioning testing, and periodic testing that allows the verification, and quantification of the performance of Microgrid Monitoring, Control, and Energy Management Systems (MMCS & MEMS). This technical specification applies to MMCS & MEMS developed for grid-connected or islanded microgrids.
This technical specification includes the following aspects:
1. General technical requirements
2. Hardware in the loop testing
3. Commissioning testing
4. Periodic testing
The HIL test aims to verify the performance of MMCS & MEMS’ major functions and provide a set of metrics to quantify the minimum requirements of different functions. This test requires the interaction between both systems and the real-time simulation environment.
The commissioning test provides the performance evaluation of both systems’ major functions on -site. This test shall be conducted after MMCS & MEMS are installed and ready for operation. Certain testing items will show actual performances of the MMCS & MEMS such as voltage deviation, harmonics, step power response, transient voltage/current evolution, stability margin, power management efficiency, etc.
The periodic function test is set to verify certain functions’ performance after a certain time of operation. The test interval is specified by the manufacturer, system integrator, or microgrid owner
This proposed project aims to provide a standardized testing procedure for MMCS & MEMS’ major functions. The major functions of MMCS & MEMS include the control of device switching, islanding detection, operation modes switching, active/reactive power contr ol, black-start, anti-maloperation locking, local power quality control, frequency/voltage regulation, tertiary control, etc. This proposed standard specifies the tests to be performed during the life cycle of MMCS & MEMS: design, commission, and operation . This proposed standard also adopts a modular approach to ensure minimum requirements are met and establish comparative performance indices for different functions.
A standardized set of testing procedures could facilitate the wide adoption of standard M MCS & MEMS functional and performance requirements by vendors and utilities, for ease of interfacing with the Distribution Management System (DMS) while reducing the cost of design and construction.
IEC TS 62898 series is intended to provide comprehensive guidelines and technical requirements for microgrid projects, however, there are some standardization gaps left in this series.
Identified standardization gaps among the existing standards: IEC TS 62898-3-2 covers the technical requirements for microgrid energy management systems (MEMS), but this standard does not specify any testing procedures required for MEMS.
IEC TS 62898-3-4 covers the technical requirements for the monitoring and control of microgrids, however, it does not specify any testing items or procedures for MMCS.
Therefore, IEC TS 62898-3-5 will improve the IEC microgrid standard architecture and will be complementary to IEC TS -3-2 and -3-4 which are in DTS stage.
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