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The most difficult challenge of converting the PSCAD model for use in the Electromagnetic Simulation Program (ESP), developed by China Southern Power Grid (CSG), is that the PSCAD model is graphically-based and the topology information of all elements is realized via the closeness of the coordinates of the element. This paper describes the details of PSCAD models, how to map the PSCAD model into the...
Increasing renewable penetration and deployment of microgrids have the potential to completely change the way the power systems are being operated today. In order to address these emerging challenges, new simulation tools need to be developed to study the influence of renewables, microgrids, distributed generation resources, and the interaction among them. Towards this end, China Southern Power Grid...
The most difficult challenge of converting the PSCAD model for use in the Electromagnetic Simulation Program (ESP), developed by China Southern Power Grid (CSG), is that the PSCAD model is graphically-based and the topology information of all elements is realized via the closeness of the coordinates of the element. This paper describes the details of PSCAD models, how to map the PSCAD model into the...
The paper discusses how to develop the Geomagnetically Induced Currents (GIC) model for a real power system, identifies the transformers most susceptible to high levels of GIC flow and estimates transformer reactive power (Var) losses associated with GIC-induced over excitation. Even though Southern California Edison (SCE) is located at lower latitudes, the study shows that GIC may cause significant...
A hybrid simulation/measurement-based framework for online dynamic security assessment (DSA) is proposed in this work. It combines the strengths and features of simulation-based and measurement-based approaches to develop a tool that integrates the results and provides real-time situational awareness on available operating margins against major stability problems. High performance computing capability...
An online transmission line (TL) impedance parameter identification system (TPIS) using PMU measurements was recently developed and implemented at China Southern Power Grid Company (CSG). Traditional approaches for TL impedance calculation only approximate the effect of conductor sags and ignore the dependence of impedances on temperature variation. Utilizing PMU measurements may improve the accuracy...
China Southern Power Grid Company (CSG) and eMIT, LLC recently developed and implemented an online risk-based security assessment system-Probabilistic Security Risk Assessment (PSRA). PSRA calculates the probability of undesirable events in the transmission system and evaluates their corresponding severities. PSRA combines the probability measure of each undesirable event with the consequence measure...
This paper presents an overview of the research project “High-Performance Hybrid Simulation/Measurement-Based Tools for Proactive Operator Decision-Support”, performed under the auspices of the U.S. Department of Energy grant DE-OE0000628. The objective of this project is to develop software tools to provide enhanced real-time situational awareness to support the decision making and system control...
In this paper, parallelization and high performance computing are utilized to enable ultrafast transient stability analysis that can be used in a real-time environment to quickly perform “what-if” simulations involving system dynamics phenomena. EPRI's Extended Transient Midterm Simulation Program (ETMSP) is modified and enhanced for this work. The contingency analysis is scaled for large-scale contingency...
A novel renewable energy intermittency model and a new midterm dynamic simulation tool in power systems are developed for examining dynamic behavior along the load curve for different combinations of the system operation reserves and renewable portfolio standard (RPS) rates. The system’s import limits are considered. It is concluded that ignoring intermittency and governor effects is an inadequate...
Dynamic stability analysis (DSA) software allows for computing transient and dynamic responses to a large number of potential grid system disturbances (contingencies). Typically, using past tools, DSA analysis is performed off-line since the simulation process took hours to compute the simulation of a large number of contingencies for a large interconnected power system. This paper presents a new...
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