A Fundamental Study on the Transient Stability of Power Systems with High Shares of Solar PV Plants

Nikhil Kalloe,Jose Rueda Torres,Mart Van Der Meijden,Jorrit Bos,Peter Palensky

doi:10.3390/electricity1010005

Nikhil Kalloe, Jose Rueda Torres + Show 3 more

Open Access

https://doi.org/10.3390/electricity1010005

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Journal: Electricity	Publication Date: Nov 12, 2020
Citations: 8	License type: CC BY 4.0

Affiliation: Tennet (Netherlands), Delft University of Technology

Abstract

The last decade has seen an immense growth in renewable energy sources such as solar photovoltaic (PV) plants due to environmental concerns. Due to this rapid growth, solar PV plants are starting to have a larger influence on power system stability and thus their dynamic behavior cannot be ignored in stability studies. The lack of well-established models and parameter sets is the primary reason solar PV plants are not modeled with dynamic characteristics. This paper presents a method to define a standard parameter set for representing large-scale and aggregated solar PV plants in stability studies from the perspective of the transmission system operator (TSO). The method takes into account primarily the conditions provided in the grid connection requirements; for illustrative purposes, the connection requirements of the Netherlands are used. Additionally, a relationship defined as short-circuit current (SCC) PV ratio is proposed to estimate the effect of solar PV plants on transient stability. To illustrate the workings of the proposed ratio, the transmission network of the TenneT TSO B.V. in the Netherlands is used. The analysis demonstrated that high values of SCC PV ratio are an indicator that solar PV plants affect the transient stability while low values of SCC PV ratio showed that solar PV plants have minimal effect on the transient stability. Additionally, methods to improve the transient stability are provided which include limiting the operation regions of critical generators, increasing short-circuit ratio by adding a synchronous condenser or static compensator (STATCOM) and decreasing the reactance between the critical synchronous generator and faulted bus.

Highlights

Over the last couple of years, the temperature of the surface of the earth has increased significantly
The software tools to carry out the simulations are Power System Simulator for Engineering abbreviated as PSS/E version 34.7 aided by Python 2.7
This paper proposes a method for obtaining a standard parameter set for representing large-scale and aggregated solar PV plants to address the research gap concerned with a lack of accepted parameters sets for representation of solar PV plants

Summary

Introduction

Over the last couple of years, the temperature of the surface of the earth has increased significantly It is projected, if no additional measures are taken, an increase between 1.1 ◦C and 6.4 ◦C will take place of the global mean surface temperature over the coming 100 years [1]. The emission of greenhouse gases (GHGs) is the root cause for soaring temperatures on the surface of the earth. These earth-damaging gases come from different sectors such as the energy sector, agriculture sector and waste sector, just to name a few. Fossil fuels (such as coal and natural gas) used for producing electrical energy are accountable for a huge part of GHG emissions in the energy sector [5]

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