Development of converter based reconfigurable power grid emulator

Yang, Liu; Ma, Yiwei; Wang, Jingxin; Wang, Jing; Zhang, Xiaohu; Tolbert, Leon M.; Tomsovic, Kevin

doi:10.1109/ecce.2014.6953944

Cited by 44 publications

(15 citation statements)

References 24 publications

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“…The proposed HTB can integrate with other real-time simulator platforms with an amplifier since the HTB can output actual electrical/analog signals. The HTB [26] has been used to study several different power system scenarios. This paper provides an overview of this unique HTB testing platform, its characteristics, including advantages and shortcomings, and provides a few examples of power system scenarios that have been studied with this platform.…”

Section: Key Contributionsmentioning

confidence: 99%

Reconfigurable Real-Time Power Grid Emulator for Systems With High Penetration of Renewables

Tolbert

Wang

Tomsovic

et al. 2020

IEEE Open J. Power Energy

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Novel power system control and new utility devices need to be tested before their actual deployment to the power grid. To assist with such a testing need, real-time digital emulators such as RTDS and Opal-RT can be used to connect to the physical world and form a hardware in the loop (HIL) emulation. However, due to the limitations of today's computational resources, the accuracy and fidelity suffer from different levels of model reductions in purely digital simulations. CURENT has developed a reconfigurable electric grid hardware testbed (HTB) to overcome the limitations of digital emulators. The HTB has been used to develop measurement, control, modeling, and actuation techniques for a national grid with a high penetration of renewables. The power electronic-based system includes emulators for synchronous generators; photovoltaics with gridinterfacing inverter; wind turbines; induction motor loads, ZIP loads, power electronic loads; batteries; ac and dc transmission lines; short circuit faults and grid relay protection; and a multiterminal HVDC overlay including power electronics interfaces. The system contains real elements of power flow, measurement, communication, protection, and control that mimic what would be seen in an actual electric grid. This paper presents an overview of the HTB and several scenarios that have been run to determine control and actions needed for the future power grid.

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Section: Key Contributionsmentioning

confidence: 99%

Reconfigurable Real-Time Power Grid Emulator for Systems With High Penetration of Renewables

Tolbert

Wang

Tomsovic

et al. 2020

IEEE Open J. Power Energy

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“…Owing to the complexity and expensive nature, it is impractical to demonstrate the effectiveness of the new control strategy in a real power grid. Hence, the proposed adaptive WADC is implemented in a two-area four-machine system [36] on a real-time power grid emulation platform to show its effectiveness. Although the existing platform only has one inter-area mode, the concept is applicable to any adaptive hierarchical inter-area damping control.…”

Section: Case Studymentioning

confidence: 99%

“…The HTB [36] in the National Science Foundation and Department of Energy (NSF/DOE) engineering research center-Center for Ultra-wide-area Resilient Electric Energy Transmission Networks (CURENT), USA, is a platform built for power grid control methodology test and demonstration. The two-area four-machine system as shown in Fig.5 is now emulated on the HTB [37], which provides a perfect environment for WADC implementation, testing, and demonstration.…”

Section: A Hardware Test-bed (Htb) Platformmentioning

confidence: 99%

“…MATLAB code of an adaptive WADC was integrated into the HTB control software using standard LabVIEW interface. The configuration and parameters of this two-area fourmachine system are described in [36]. All PMU equipped generators are monitored with frequency deviation measured and transmitted to the wide-area damping control center via the PMU data collection system.…”

Section: A Hardware Test-bed (Htb) Platformmentioning

confidence: 99%

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Design and implementation of a measurement-based adaptive wide-area damping controller considering time delays

Bai

Zhu

et al. 2016

Electric Power Systems Research

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Wide-area measurement systems enable the wide-area damping controller (WADC) to use remote signals to enhance the small signal stability of large scale interconnected power systems. System operating condition variations and signal transmission time delays are the major factors to worsen the damping effect and even deteriorate the system stability. This paper proposes a novel measurement-based adaptive wide-area damping control scheme using oscillation mode prediction and system identification techniques. These techniques adjust the parameters of WADC as well as the time delay compensation in an online environment. To achieve fast online implementation, an identified high order multi-input multi-output (MIMO) model is deformed into a low order single-input single-output (SISO) model according to the residue of MIMO model. The SISO model can accurately represent the power system dynamics in the form of a transfer function, capturing the dominant oscillatory behaviors in the frequency range of interest. Moreover, the WADC has been implemented on a hardware test-bed (HTB) by adding its output signal to the excitation system of a selected generator. The effectiveness of the proposed measurement-based adaptive WADC has been demonstrated in a two-area four-machine system on the HTB under various disturbance scenarios.

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“…Based on the PHIL concept, many different kinds of converter-based emulators whose electrical behaviours are controlled to represent those of the models have been developed for the realistic and flexible testing, such as synchronous generator emulator [12], load emulator [13], induction motor load emulator [14], variable-speed wind turbine emulator [15], photovoltaic emulator [16], and energy storage emulator [17], etc. Typically, a number of emulators, each emulating a particular component, are connected together to form a hardware test bed (HTB) for the emulation of power systems [18]. In practice, the HTB can only emulate limited power network and its stability issues will be more severe due to the multiple power interfaces among the multiple emulators [2,19,20].…”

Section: Introductionmentioning

confidence: 99%

Applications of Digital-Physical Hybrid Real-Time Simulation Platform in Power Systems

et al. 2018

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Digital-physical hybrid real-time simulation (hybrid simulation) platform integrates the advantages of both digital simulation and physical simulation by combining the physical simulation laboratory and the real-time digital simulator. Based on a 400 V/50 kVA hybrid simulation platform with 500 kVA short-circuit capacity, the hybrid simulation methodology and a Hausdorff distance based accuracy evaluation method are proposed. The case validation of power system fault recurrence is performed through this platform, and the stability and accuracy are further validated by comparing the hybrid simulation waveform and field-recorded waveform and by evaluating the accuracy with the proposed error index. Two typical application scenarios in power systems are studied subsequently. The static var generator testing shows the hybrid simulation platform can provide system-level testing conditions for power electronics equipment conveniently. The low-voltage ride through standard testing of a photovoltaic inverter indicates that the hybrid simulation platform can be also used for voltage standard testing for various power system apparatus with low cost. With this hybrid simulation platform, the power system simulation and equipment testing can be implemented with many advantages, such as short period of modelling, flexible modification of parameter and network, low cost, and low risk. Based on this powerful tool platform, there will be more application scenarios in future power systems.

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Development of converter based reconfigurable power grid emulator

Cited by 44 publications

References 24 publications

Reconfigurable Real-Time Power Grid Emulator for Systems With High Penetration of Renewables

Reconfigurable Real-Time Power Grid Emulator for Systems With High Penetration of Renewables

Design and implementation of a measurement-based adaptive wide-area damping controller considering time delays

Applications of Digital-Physical Hybrid Real-Time Simulation Platform in Power Systems

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