Abstract:This report reflects the results of U.S. Department of Energy's (DOE) Grid Modernization project 0074 "Models and methods for assessing the value of HVDC [high-voltage direct current] and MTDC [multiterminal direct current] technologies in modern power grids." The work was done by the Pacific Northwest National Laboratory (PNNL) and Oak Ridge National Laboratory (ORNL) in cooperation with Mid-Continent Independent System Operator (MISO) and Siemens. The main motivation of this study was to show the benefit of … Show more
“…One of the studies considers the benefits of introducing a higher penetration of solid-state power substations like HVdc systems. An Oak Ridge National Laboratory (ORNL) and Pacific Northwest National Laboratory (PNNL) [28,29] study considered different configurations of HVdc systems based on voltage-source converters (VSCs) and line-commuted converters (LCCs) connecting US interconnections. One configuration is a VSC based multiterminal direct current (MTdc) systems connecting EI, ERCOT, and Western Interconnection (WI) grids.…”
“…Organization/Reference Scenarios and Studies Challenges Identified Outcomes ORNL, PNNL [28,29] Different configurations of HVdc systems based on VSCs and LCCs connecting US interconnections have been researched.…”
Section: Table Es-2 Summary Of Studies On Us Grids With High Penetration Of Power Electronics That Used Emt Simulation Tools (Continued)mentioning
confidence: 99%
“…The typical simulation of duration of components is hundreds of milliseconds to two seconds with a time step on the order of nanoseconds to microseconds. The number of states simulated is on the order of tens of thousands (with a maximum of 50,000 estimated), and the time taken to simulate ranges from 1 min to 10 h [28,29].…”
“…One of the studies considers the benefits of introducing a higher penetration of solid-state power substations like HVdc systems. An Oak Ridge National Laboratory (ORNL) and Pacific Northwest National Laboratory (PNNL) [28,29] study considered different configurations of HVdc systems based on voltage-source converters (VSCs) and line-commuted converters (LCCs) connecting US interconnections. One configuration is a VSC based multiterminal direct current (MTdc) systems connecting EI, ERCOT, and Western Interconnection (WI) grids.…”
“…Organization/Reference Scenarios and Studies Challenges Identified Outcomes ORNL, PNNL [28,29] Different configurations of HVdc systems based on VSCs and LCCs connecting US interconnections have been researched.…”
Section: Table Es-2 Summary Of Studies On Us Grids With High Penetration Of Power Electronics That Used Emt Simulation Tools (Continued)mentioning
confidence: 99%
“…The typical simulation of duration of components is hundreds of milliseconds to two seconds with a time step on the order of nanoseconds to microseconds. The number of states simulated is on the order of tens of thousands (with a maximum of 50,000 estimated), and the time taken to simulate ranges from 1 min to 10 h [28,29].…”
“…Modern power grid is experiencing a major evolution from ac to mixed ac-dc transmission systems with decreasing costs and noticeable economic and technical benefits of dc technologies. Some of the technical benefits of dc technologies include the abilities to interconnect several asynchronous grids, to integrate renewable energy generations, to support underground transmission, to increase the power transfer capability over long distances [1], [2], and to supply loads through variable frequency drives (VFDs) [3] - [5]. The dc technologies are also capable of providing ancillary services to enhance the economics and reliability of power systems and optimize the performance of ac grids [2].…”
Section: Introductionmentioning
confidence: 99%
“…This work has developed high-fidelity dynamic models of modular multilevel converters (MMCs) -based high-voltage direct current (HVdc) system [6]. The deliverables also include the development of high-fidelity models and control algorithms of multi-terminal MMC-HVdc systems connecting Eastern Interconnection (EI), Western Electricity Coordinating Council (WECC), and Electric Reliability Council of Texas (ERCOT) [2], [6]. The developed control strategy for the multi-terminal MMC-HVdc system exhibits up to 51.75% improvement in frequency response with the connection of all the three asynchronous power grids in the United States [7].…”
Modular multilevel converters (MMCs) are widely used in the design of modern high-voltage direct current (HVdc) transmission system. High-fidelity dynamic models of MMCsbased HVdc system require small simulation time step and can be accurately modeled in electro-magnetic transient (EMT) simulation programs. The EMT program exhibits slow simulation speed and limitation on the size of the model and brings certain challenges to test the high-fidelity HVdc model in system-level simulations. This paper presents the design and implementation of a hybrid simulation framework, which enables the co-simulation of the EMT model of Atlanta-Orlando HVdc line and the transient stability (TS) model of the entire Eastern Interconnection system. This paper also introduces the implementation of two high-fidelity HVdc line models simulated at different time steps and discusses a dedicated method for sizing the buffer areas on both sides of the HVdc line. The simulation results of the two HVdc models with different sizes of buffer areas are presented and compared.
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