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At a given nuclear power plant, nuclear safety is directly dependent on a reliable source of electric power supplied via the plant’s auxiliary power system. The auxiliary power system typically consists of an MV and LV AC and a DC distribution system, powering thousands of individual loads and circuits, i.e., pumps, fans, valves, sensors, and controls specifically designed to protect the integrity of the nuclear reactor and containment structures. This presentation will explore past practices and recent developments in the online monitoring of such systems using a digital twin. The presentation includes the reasons for utilizing online monitoring, the advantages of using a digital twin versus simple data collection, and the multi-faceted benefits realized from such a system (i.e., business, safety, reliability).
This study simulates the impact of step loading on the transient stability of a 2 x 25 MW GTG-based captive power plant at one of the Chemical Fertilizer Plants located at Trombay, India. The variation of electrical frequency and terminal voltage of the generator during the most conservative step loading of one generator unit is studied. The loads divided in steps are switched at certain time intervals to determine whether the frequency profile of the system is within the acceptable limit of ±5%. Load Flow and Short Circuit Studies are performed on the entire power plant distribution network of the fertilizer plant in advance to check the adequacy of equipment ratings during normal and short circuit conditions with all verified input data. The step load response study is carried out with only one GTG unit running in isolation, feeding only the critical emergency loads. Transient behavior of the GTG unit is simulated with IEEE transfer function dynamic models, viz. AC8B model of excitation system (AVR) and IEEE GGOV1 model for turbine governing system using the in-built standard library in ETAP software version 16.1.0. Various parameters of the generator like speed, active and reactive power, bus voltage, and frequency are plotted for determining the transient performance of the GTG unit.
Learn about ETAP ArcSafety, an all-in-one AC & DC arc flash solution for LV, MV & HV systems that improves safety, reduces risk, minimizes equipment damage, and validates mitigation techniques.
It is crucial to define the reactive power limits to evaluate the voltage support available under normal, abnormal and emergency operations with the unit's safe functioning. Published generator thermal capabilities curves, produced by the manufacturer, define the limits for safe operation based on the generator design's thermal limitations. Practically, the available reactive capability differs from the published equipment curves due to plant specific design and operating constraints. This presentation discusses a theoretical approach utilizing a simplified electrical distribution system and an ETAP model to identify and validate the plant-specific unit capability.
The implementation of a Microgrid involve several stages, in which the engineer has to deal with the interaction of different processes and dynamics, taking into account the different modes, topologies and scenarios that the system could possibly have. This is the case of an ongoing project for an important Grid operator in Colombia, in which PTI S.A and OTI are working together to deliver a comprehensive Monitoring and Control system for an entire Microgrid, comprised of different energy resources as Diesel, Solar, Batteries and a connection to the Public Grid. Project stages involve Planning, Design, Validation, In site Deployment and Testings, and for that purposes, Etap PS/RT and Opal RT solutions will be used, on a Digital Twin Platform environment.
This presentation focuses on HV arc flash hazard analysis, as part of a multi-voltage AF study (115, 34.5, 13.8, and 0.22 kV) for one of the three largest utilities in South America with hydro and renewables generation and T&D. It demonstrates the versatility of the ETAP ArcFault™ to assist in the calculations and estimates of electric arc currents and incident energy level for HV substation equipment. The presentation discusses how ArcFault study results were used to select engineering and administrative control strategies, personal protective equipment (PPE), changes in protection schemes and adjustments to reduce electrical risks in operation & maintenance of electrical T&D systems.
Since the release of IEEE 1584-2018, the industry has been challenged to reach a consensus on applying the new standard. The most significant application “pain” so far has been identifying actual equipment data for input to the study, including bus gap and electrode configurations in the equipment. A case study of an arc flash analysis for a large university campus with MV and LV power distribution equipment of different types, vintages, and manufacturers is presented. The presentation highlights selection of electrode configuration(s) for various equipment types and voltage levels and correct application of arc current and enclosure size correction factors to significantly reduce the data entry time and effort. The presentation will cover upcoming IEEE P1584.1 revisions to apply IEEE 1584 for arc-flash hazard calculations directly from the revision subgroup chair.
Case study of a a power system study, which involved the replacement of an extensive UPS system at a data center. The studies included short-circuit, protective device coordination, and arc-flash hazard analysis for both the AC and DC systems consistent with the NFPA 70E 2027 and IEEE 1584 2018 Standards. The DC equipment as installed required mitigation efforts due to high incident energies. This presentation details the analysis, findings, and recommended mitigation for anyone embarking on similar retrofit or expansion studies.
HyperloopTT focuses on systems that moves people and goods safely, efficiently and sustainably; bringing airplane speeds to the ground by using passive levitation and electric linear propulsion in a low-pressure tube. This presentation discusses the complex power system challenges and collaboration with ETAP for conceptual design and detailed engineering of the 1st commercial prototype. The companies will then thereafter collaborate with ETAP and migrate the digital twin into operations to validate and improve the prototype design and extend to upcoming long-distance commercial & freight systems.
This case study for Mumbai Metro Rail covers Operator Training Simulator (OTS), where the customer is specifically looking for a simulation environment to test their operations in a real-time environment for the following reasons: avoid errors, enhance communication & management of new crews, train inexperienced operators, certification and competency for operators, situational awareness & workload management. ETAP OTS helped Schneider Electric, India, to give the right solution for Metro Mumbai. ETAP OTS utilizes a model-driven power network that enables the customer to approve switching procedures, perform predictive simulations to verify correct switching actions with software-in-the-loop, replicate real-world situations with unlimited scenarios for knowledge transfer via a trainer-to-trainees learning environment.