Category Archives: Tools and Guidelines

Provides step-by-step guidance for municipal Distributors regarding assessing applications 1MW or larger, including regulatory aspects, technical standards, necessary documentation etc.

A specification that can be given to installers/consultants which clarifies the grid impact assessments that are to be undertaken, and various approaches and parameters that are acceptable in such studies. Municipal distributors should fill in and/or customize as necessary. (Sustainable Energy Africa, 2022)

If you are considering installing a rooftop photovoltaic (PV) system, but you are not sure how to do it safely and legally, these guidelines will help you to: Make informed decisions about what type of PV system to install. Select the best service provider. Understand all the key requirements before, during and after installation.

Recommendations for simulation studies as part of Grid Code compliance for Renewable Energy Power Plants and Hybrid Power Plants (P13906).  MPE.

The Deterministic Hosting Capacity Analysis tool is a DIgSILENT programming language (DPL) script that calculates the hosting capacity of a LV network through deterministic means. It computes the generation capacity that can be accommodated on each bus out of a set of selected buses (determined by the user) of a LV network without violating any voltage or thermal limits. However, it does not compute the hosting capacity of the whole network. The hosting capacity of each bus is calculated assuming that no generators are connected any else on the network. For each bus, the tool also determines where network strengthening can be applied to increase the bus hosting capacity.

The Stochastic Hosting Capacity Analysis tool is a DIgSILENT programming language (DPL) script that calculates the hosting capacity of a LV network using stochastic methods. The tool computes the generation capacity that can be accommodated by the whole LV feeder network without violating any voltage or thermal limits. Additionally, the tool provides results for a configuration that describes how this generation capacity can be distributed between a given set of buses/nodes (determined/identified by the user). The tool also provides information on where network strengthening can be applied to increase its hosting capacity. The nature of the algorithm applied is such that is closely mimics events as seen in real networks where small-scale embedded generators of random sizes are connected at random locations.

This user guide is intended to help the reader with using the hosting capacity analysis tool for both the deterministic and stochastic method. The hosting capacity analysis tool is meant for use in LV networks to assess the amount of generation capacity that can be integrated into LV networks without compromising the power quality and reliability of the networks under existing control configurations and without requiring network strengthening. This guide covers the requirements needed/prerequisites that need to be met to use the tool, how to import the scripts of into DigSILENT project, and steps on how to use the stochastic and deterministic hosting capacity analysis methods/scripts. (CSIR, 2021)

The following test cases can be used to test the load flow assessment tool. The parameter for each network are given together with the expected results for each scenario (CSIR, 2021).

This user guide is a reference for use of the Load Flow Assessment tool for Small Scale Embedded Generation (SSEG) into medium and low voltage networks. It is intended for small radial distribution networks with a maximum of four buses and a minimum of two buses. Its purpose is to calculate steady-state currents, bus voltages, real and reactive power flows through branches in a network. It offers insight into how a network performs in a various operating conditions. The tool also gives insight into over and under voltage situations and thermal limit violations (CSIR, 2021).

The Load Flow Assessment tool is for Small Scale Embedded Generation (SSEG) in medium and low voltage networks. It is intended for small radial distribution networks with a maximum of four buses and a minimum of two buses. Its purpose is to calculate steady-state currents, bus voltages, real and reactive power flows through branches in a network. It offers insight into how a network performs in a various operating conditions. The tool also gives insight into over and under voltage situations and thermal limit violations (CSIR, 2021).