Category Archives: Grid Impact Studies

This spreadsheet assists municipal distributors evaluate grid impact studies for embedded generators to connect to their distribution grid (DIgSILENT, 2022).

This spreadsheet assists the exchange of data between municipal distributors and customers installing embedded generation for the purposes of grid impact studies (DIgSILENT, 2022).

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)

This information booklet provides information to municipalities that are experiencing an increase in the number of SSEG on their networks. The booklet focuses on the grid impacts of SSEG by introducing two tools: (1) an SSEG load from tool, and (2) an SSEG hosting capacity tool. (CSIR, 2022)

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).

Presentation on Grid Impact studies: Theory and Practical (Crescent Mushwana & MpeliRampokanyo-CSIR, 2019).

Presentation on the connection of small generators to LV networks, and simplified grid impact study calculation method that can be used (Peter Lilje 2019).

The Grid Impact Study guideline provides a hand calculation method to assess whether any network changes are required to enable the connection of generators (such studies are often required if systems exceed the parameters in NRS097-2-3). Covers low and medium voltage connections (MPE, 2018).