Grid Impact Study Specification (Guide)
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)
Single Line Diagrams (SLDs) for EG, Off-grid, UPS etc systems (Compilation)
PDF file with example SLDs for a range of typical system types and configurations.
Single Line Diagrams for EG, off-grid, UPS etc (zip folder)
A downloadable zip folder containing ALL single line diagrams in different formats.
NRS097-2-1: 2024 Grid Connection of Embedded Generation – Utility Interface
NRS097-2-1: 2024 Grid Connection of Embedded Generation – Utility Interface
Guide to integrating embedded generation and wheeling in municipal electricity billing systems
This guideline is intended as an introductory resource to give direction to municipalities faced with integrating export tariffs or wheeling transactions into their billing systems.
Approved Photovoltaic Inverter List (September 2024)
The City of Cape Town’s approved inverter list for NRS097-2-1 2017 and later versions (inverters with NRS097-2-1 certificates before 2017 version are not on this list). Cape Town updates this list periodically, so visit the City of Cape Town website to see the latest version.
NRS 097-2-3:2023 Simplified Connection Criteria for LV Connected generators
NRS 097-2-3 provides criteria to be applied when applications for LV connected embedded generators are being assessed. If generators fall within these criteria, they can be approved without doing grid impact studies.
Grid Impact Study Evaluation Form
This spreadsheet assists municipal distributors evaluate grid impact studies for embedded generators to connect to their distribution grid (DIgSILENT, 2022).
Guide for Municipalities on Assessing EG Applications 1MW and Larger
Provides step-by-step guidance for municipal Distributors regarding assessing applications 1MW or larger, including regulatory aspects, technical standards, necessary documentation etc.
Grid Impact Study Data Requirements Spreadsheet
This spreadsheet assists the exchange of data between municipal distributors and customers installing embedded generation for the purposes of grid impact studies (DIgSILENT, 2022).
Rooftop PV Guidelines for Safe and Legal Installations in Cape Town (April 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,
Cape Town EBE27 EG Quality of Supply
City of Cape Town’s quality of supply specification for embedded generators on the distribution network.
Cape Town EEB1330 System Operations Manual
City of Cape Town’s embedded generator operations manual for category B and C generators (>1MW), which form part of their requirements for such generators.
Cape Town EEB705 Technical Standard for the Interconnection of Embedded Generation
City of Cape Town’s technical standard governing the connection of embedded generation to the distribution network.
Technical Standard for the Interconnection of Embedded Generation (Cape Town)
Cape Town’s standard for the interconnection of embedded generation (City of Cape Town)
SSEG Grid Impacts Support Information Booklet
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)
Recommended Practice for Grid Code Compliance Studies for RPP and Hybrid Power Plants
Recommendations for simulation studies as part of Grid Code compliance for Renewable Energy Power Plants and Hybrid Power Plants (P13906). MPE.
Deterministic Hosting Capacity Analysis tool
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
Stochastic Hosting Capacity Analysis tool
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
Hosting Capacity analysis tool user guide
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
SSEG Load Flow Tool Test Cases
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).
SSEG Load Flow Tool User Guide
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
SSEG Load Flow Tool
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
SSEG Bi-directional Metering Checklist and Specification Guide
Provide a checklist of meter functionality requirements and information to be included in a meter specification (Sept 2021)
SSEG Guide for Municipal Distributors
This document describes how municipal distributors can adjust to a future where SSEG is a more significant part of their network. It starts by outlining the high-level institutional and operational changes that are necessary, and then moves to the practicalities of the processes, requirements, documents, and capacity needed to accommodate
Power systems simulations comparison
A table comparing different power system simulation software characteristics. Compiled by the CSIR (CSIR, 2019).
Smart Prepayment Solutions for PV/SSEG
A presentation on smart prepayment metering solutions for PV/SSEG (Dave Tarr, 2019).
PV Green Card Brochure for Installers
An overview of the PV Green Card quality assurance programme for installers, the benefits of engaging in this programme, as well as how to apply for such Green Card accreditation (South African Photovoltaics Industry Association, 2018).
PV Green Card Brochure for Customers
Provides an overview of the PV Green Card quality assurance programme, the benefits the programme for prospective PV SSEG customers, as well as how to go about engaging with PV GreenCard installers. (South African Photovoltaics Industry Association, 2018)
Metering for Small-Scale Embedded Generation Guide
Provides information to assist the choice and procurement of bi-directional metering for SSEG, including types and configurations of meters, links with smart metering systems, and relevant metering specifications (Sustainable Energy Africa, 2019).
Approved Photovoltaic Inverter list (NRS097-2-1, 2010 and 2017)
The City of Cape Town’s list of type tested inverters/equipment in terms of NRS 097-2-1 (2010 and 2017). Cape Town periodically updates this list, so check the City of Cape Town website for the latest list (City of Cape Town, 2019).
Declaration for off-grid SSEG
City of Cape Town’s form for declaring any off-grid generators and UPS systems (City of Cape Town, 2019).
Guide for the Application of Standards for Smart Metering Systems in Africa
Provides information on standards for smart metering, in the interests of harmonising standards across the continent (AFSEC, 2018).
Recommended practice for assessing the connection of small generators based on renewable energy sources to low-voltage and medium-voltage municipal grids
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).
NRS097-2-1: 2017 Grid Interconnection of Embedded Generation – Utility Interface
NRS097-2-1 Grid Interconnection of Embedded Generation - Utility Interface
NRS 049:2016 Advanced Metering Infrastructure Requirement for Smart Metering System
NRS 049 covers the entire smart metering system from the enterprise level down to the end device.
Grid Connection Code for Renewable Power Plants Connected to the electricity transmission system or the distribution system in South Africa
The grid connection code is to specify minimum technical and design grid connection requirements for Renewable Power Plants (RPPs) connected to or seeking connection to the South African electricity transmission system (TS) or distribution system (DS).
Ekurhuleni Solar PV Case Study
A brief hi-level description of Ekurhuleni’s Leeupan 200kW solar PV plant (Ekurhuleni Metropolitan Municipality, 2012).
NRS 057:2005 South African National Standard Code of practice for electricity metering
This code of practice specifies the procedures and standards to be adhered to by electricity licensees and their agents in operating and servicing new and existing metering installations.