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Author: h.gras
Type: Model
Downloaded: 76 times
Date: 2022-10-20

Dynamic Exponential Load

Description:
This device is an implementation of the three-phase exponential load model. The load active power and reactive power vary as function of its voltage amplitude and frequency. This device is implemented... see more as described in [1]. It allows to perform classical and sophisticated dynamic-stability studies in EMTP. This device can be used in the load flow and time-domain simulations.

During the load initialization, the initial active power and initial reactive power are used to find the load-flow. The load voltage magnitude and phase with update from the load flow results automatically.
[1] "Load representation for dynamic performance analysis (of power systems)," IEEE Transactions on Power Systems, vol. 8, no. 2, pp. 472-482, May 1993.

Tag(s): dynamic, load, frequency, exponential, stability,

Author: h.gras
Type: Example
Downloaded: 118 times
Date: 2022-04-04

AC line pipeline magnetic coupling

Description:
Example of overvoltage induced by magnetic coupling between a line and a pipeline

Tag(s): pipeline, coupling, induced, overvoltage

Author: rcastilloj
Type: Model
Downloaded: 93 times
Date: 2021-10-01

Power System with a Transmission Line operating at low frequency

Description:
Demonstration of the operation of a power system with a transmission line in low frequency. This model contains a 5-bus power system with a transmission line operated at a frequency of 41Hz.
The ... see moresystem includes:
- Model of frequency converters (averaged model of the Modular Multilevel Matrix Converter, MMMC).
- Converters control schemes.
- Initialization branches to include the low frequency line in the steady-state calculation.
- Internal variables of the converters such as voltages in the storage capacitors, branch currents, internal voltages, among others, can be plotted.
- External variables to the converters such as power flow in the low frequency line, currents and voltages can also be plotted.

Tag(s): MMMC, Low-Frequency AC Transmission, Power System Operation, Power converters, Control of power converters

Author: h.gras
Type: Example
Downloaded: 73 times
Date: 2021-07-23

Zero-crossing fault

Description:
This example provides a device which is a 3-phase bolted fault.
Once the simulation time has passed faultTime, the first phase voltage
crossing zero triggers the fault on the 3 phases simult... see moreaneously.

Tag(s): zero-crossing, zerocrossing, fault, DC, asymmetry

Author: h.gras
Type: Example
Downloaded: 201 times
Date: 2019-04-16

Load-flow voltage violation assessment

Description:
This example shows a way to automatically detect voltage violations of the load-flow results.
Users can set low and high limits for each bus (for example 0.95pu-1.05pu).

Tag(s): voltage, violation, load-flow