POWER-GEN Asia 2018

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The Grid Compliance for Distributed Genset in the Future Power Grids in Asia (Room Garuda 9, 1st Floor)

The penetration of renewable energies into the electrical power system is gaining pace at a global level driven by environmental concerns and the desire for sustainable development. The stability and reliability of the power system is potentially challenged by a high level penetration of the renewable energy. Two challenges might be raised in the power systems; the first is the reducing of the stored kinetic energy and this weakens the capability of the transient stability. The second is that a quick response is required on the power generation to compensate the power variation caused by the renewable energies. To maintain high reliability in future power systems, many grid codes have been revised to address these anticipated challenges. Engine gensets are often used for back-up power, but they are increasingly used in industries as localized generators to produce electricity mainly for local loads and supplemented by a connected utility. They can also supply power to the utility grid for the peak demands when required. In these grid-connected applications, the engine gensets are required to comply with the revised connection requirements in order to have a resilient future power system. This paper addresses the grid compliance requirements for distributed synchronous generators operating in parallel with the power grids. First, the need for grid compliance for small synchronous generators is discussed. The recent changes to the grid connection requirements (both globally and regional context) are highlighted. Subsequently, the challenges encountered while designing solutions that comply with the new connection requirements are presented. A case study is carried out to assess the grid compliance of a standard industrial sized distributed genset. Finally, several approaches for enhancing the capabilities of engine gensets, with regards to grid compliance, are discussed.