Optimal flow analysis of a unified energy system with effects of P2G

Abstract

The reformation of energy hubs has significantly augmented the apprehensions about the levels of dependency between different energy sources which often can also be discussed as independent systems conventionally. This research brings focus on the formulation and analysis of an integrated system with bi-directional energy conversions and its effects on the stability of the system for the benefit of overall secure and cost-effective operations. A general unification approach is adopted for the integration of two energy systems to execute optimal flow analysis in the form of one system based on Newton-Raphson scheme. PV solar energy is added into the system via electrical power system (EPS) to analyze the effects of renewable energy on electric network. A case study is presented to analyze the operational status of EPS and natural gas system (NGS) and effects of different factors on each system. The applicability of the proposed method is established by analysis of 20-Node Belgian gas network combined with IEEE-39 test system. The proposed method verifies not only that integrated systems with P2G capabilities and bi directional conversion increases the rate of smooth and reliable operations significantly but also discusses the limitations still present.