Dynamic Security and Stability Region Under Different Renewable Energy Permeability in IENGS System

The integration of renewable energy sources (RESs) remains growing rapidly in recent years. At the same time, security problems after contingencies were attracting great attention, due to deficiencies for stable operation, even could induce collapse integrated systems with deep interconnection such RESs. To existing issues, hyper-plane (HP) expression is proved be an excellent tool power system situational awareness and stability-constrained operation practical dynamic stability regions (PDSSR). In this study, a concept model proposed high penetration electricity-natural gas (HRE-IENGS) based on N - 1 guideline. scheme instruction evaluation processes as follows: order improve accuracy IENGS system, simulation fitting solutions PDSSR boundary presented according hybrid algorithm, including self-adaptive differential evolution algorithm (DSADE), least square support vector machine (LSSVM) algorithm. adopted approach was applied rapid approximating by HP injection spaces. Simultaneously, different permeabilities (DREPs) set from 5 50 %, active injections DREPs under short circuit fault IEEE 118 bus simulated using DIgSLENT/power factory software. As consequence, mentioned method effectively described HRE-IENGS, realized three-dimensional visualization space DREPs-PDSSR. addition, behavior points carefully investigated, unstable runs accurately exposed. Through PDSSR, state analysis conducted several parameters, assessment various supply capabilities. Meanwhile, these indexes calculated offline on-line. results study verified effectiveness modeling considered thus provide technical HRE-IENGS system.