Aggregate Protection Response of Motor Loads in Commercial Buildings

2018 IEEE Power &Amp; Energy Society General Meeting (PESGM)

et al. 2018

Self Cite

Protection strategies for transmission and distribution systems have been extensively investigated to facilitate better coordination of physical protection devices. A diverse range of functional motors with dedicated protection schemes are being used more and more in commercial, residential, and industrial buildings. This paper focuses on simulating several of the most popular protection schemes using the Electro-Magnetic Transient Program (EMTP) model for three-phase and single-phase induction motors in existing commercial buildings connected to typical distribution feeders. To investigate the behaviors of singlephase motors stalling, the actions of motor protection and reconnections, and the impacts of device-level protection on system-level dynamics, we imposed voltage depressions at the head of a feeder fully loaded with functional induction motors. Several distribution feeders are represented in a standard IEEE 39-bus transmission system to simulate fault-induced delayed voltage recovery (FIDVR) and explore mitigation strategies by optimally configuring the building-level motor protection settings.Index Terms-aggregate protection response, induction motor, load modeling, motor stalling, WECC composite load model I.

“…The percentage of each motor type is shown in TABLE I. This feeder is connected to Bus 18 of the IEEE 39 bus system [13] to replace the original ZIP load, as illustrated by Fig. 3.…”

Section: Study Casesmentioning

confidence: 99%

“…Fig. 3 IEEE 39 bus transmission system [13] The building load ratings in TABLE I are identically scaled to match the original load at Bus 18. A six-cycle three-phaseto-ground fault is applied at Bus 16 of the transmission system, depression the voltage at Bus 18 to 0.35 pu.…”

Section: Study Casesmentioning

confidence: 99%

Impact of Building-Level Motor Protection on Power System Transient Behaviors

Liu

Huang

2018 IEEE Power &Amp; Energy Society General Meeting (PESGM)

et al. 2018

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“…Due to the diversity and complexity of protection schemes in induction motor loads [10], developing adequate aggregate protection models and setting proper parameters is a complex and challenging task. The fractions of the motor loads in the composite load model vary based on different regions, seasons and day types.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a composite protection model is needed to aggregate the performance of the protection of all the motor loads in the composite load model. Recent works have looked into the composite protection behavior of residential and commercial building motor loads [10]- [13]. In [11], the authors presented a methodology to generate composite protection profiles for different commercial buildings in representative cities across different climate zones.…”

Section: Introductionmentioning

confidence: 99%

“…In [11], the authors presented a methodology to generate composite protection profiles for different commercial buildings in representative cities across different climate zones. Using integrated transmission and distribution dynamic co-simulation with detailed models of motor loads and associated protection schemes, the authors showed in [10] that the aggregate protection response of motor loads of different types can vary significantly, which were not adequately captured or reflected by the existing protection in WECC composite load model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Nonlinear Regression Method for Composite Protection Modeling of Induction Motor Loads

2020 IEEE Power &Amp; Energy Society Innovative Smart Grid Technologies Conference (ISGT)

Chu

Liu

et al. 2020

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Protection equipment is used to prevent damage to induction motor loads by isolating them from power systems in the event of severe faults. Modeling the response of induction motor loads and their protection is vital for power system planning and operation, especially in understanding system's dynamic performance and stability after a fault occurs. Induction motors are usually equipped with several types of protection with different operation mechanisms, making it challenging to develop adequate yet not overly complex protection models and determine their parameters for aggregate induction motor models. This paper proposes an optimization-based nonlinear regression framework to determine protection model parameters for aggregate induction motor loads in commercial buildings. Using a mathematical abstraction, the task of determining a suitable set of parameters for the protection model in composite load models is formulated as a nonlinear regression problem. Numerical examples are provided to illustrate the application of the framework. Sensitivity studies are presented to demonstrate the impact of lack of available motor load information on the accuracy of the protection models.

Generation of composite load protection profiles for reliable system operation

Tang

2018 IEEE Power &Amp; Energy Society Innovative Smart Grid Technologies Conference (ISGT)

James

et al. 2018

Self Cite

Motor loads are equipped with protective mechanisms to prevent any damage to the loads in the event of a fault. Accurate representation of dynamic motor loads and their protection schemes is vital for power system planning and operation, especially in understanding system's response moments after a fault has occurred. Existing load models are inadequate to capture the behavior of protection mechanisms which can vary widely between different end-use appliances. This article proposes a methodology to generate composite protection profiles for commercial building motor loads. Combining knowledge of various protection schemes available in various end-use appliances, with the commercial buildings survey data (from U.S. Energy Information Administration) and typical end-use profiles generated using EnergyPlus TM ), composite load protection profiles were generated at one-hour interval over a year, for different commercial buildings in representative cities from different climate zones.