Hydrogen Power Of A Power System

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1. INTRODUCTION: 1.1 Background: Reactive power in a power system is important to maintain or support the voltage to deliver the active power demanded by the load side. Synchronous generators are the main source of reactive power in most of the power plants. The reactive power capability of the generator is the amount of the reactive support produced at the rated generator terminals. The capability of these generators are represented by capability curves that are published by the manufacturer based solely on the thermal limitations as shown in figure-1. But in the real world, when the generator is employed in a power plant, its reactive capability is much less compared to that of published generator capability due to several design and operating constraints of the plant. This forms the basis to determine the reactive capability of the generator operating in the power plant. Fig. 1. Generator Reactive Capability Curve (D-Curve) with Different hydrogen pressures for Plant Under Study 1.2 Unit Capability: Unit capability of steam power plants using synchronous generators is the amount of the reactive power that is produced by the unit considering design constraints, system operations and limitations. In a Bulk Electric System (BES) unit capability can determine the amount of reactive power required to improve the voltage profile. So, it is important to define the capability limits to evaluate the voltage support under normal, abnormal and emergency conditions. The

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