Objectives

The primary objective is to collect voluntary market intelligence to evaluate the technical capability, commercial readiness, and operational constraints of potential providers for Reliability Services (RS). This information will guide NTCSA in designing future Ancillary Services (AS) and Demand Response (DR) markets, developing procurement strategies, and establishing transparent participation frameworks. The RFI specifically aims to map the diverse supply landscape, identify technological and logistical limitations, gauge pricing expectations, and determine what data transparency or market design adjustments would encourage broader, more reliable participation.

Scope

This is a non-binding Request for Information targeting existing, under-construction, planned, or conceptual facilities capable of supporting grid reliability. The scope spans multiple resource types, including thermal and renewable generation, battery energy storage, industrial/commercial/agricultural loads, mining operations, data centres, distributed energy resources, and aggregated portfolios. It covers established reserve products (instantaneous, regulating, ten-minute, supplemental, emergency), frequency response services, system restoration, reactive power support, and demand-side flexibility. The RFI also explores emerging operational trends such as ultra-fast frequency response, grid-forming versus grid-following inverter configurations, and participation models involving market intermediaries like aggregators, traders, retailers, and balance responsible parties.

Technical Requirements

Respondents must demonstrate facility compatibility with national grid codes and performance monitoring standards. Key technical prerequisites include:

• Advanced metering, telemetry, and Supervisory Control and Data Acquisition (SCADA) or Energy Management Systems (EMS) capable of high-resolution data sampling (≤20 milliseconds) and GPS time synchronisation for data integrity.
• Dynamic data retention policies and the ability to switch between solicited and unsolicited data streams based on operational or participation status.
• Proven or planned capability to receive and execute dispatch instructions automatically, remotely, or manually with minimal latency.
• Compliance with or a clear pathway toward certification standards for specific AS categories, including Battery Energy Storage Facility (BESF) reserves, synchronous condenser operation, and reactive power support.
• For DR participants: verifiable load reduction or consumption capability, robust baseline development methodologies, and documented operational constraints during dispatch events.
• Modelling capacity using internal tools or publicly available data portals to forecast event frequency, duration, availability windows, degradation impacts, and commercial trade-offs.

Skills Requirements

Successful engagement requires multidisciplinary expertise across engineering, commercial, and regulatory domains:

• Power Systems & Grid Operations: Proficiency in South African Grid Codes, SCADA/EMS architecture, protection relaying, and real-time dispatch protocols.
• Certification & Compliance: Familiarity with performance monitoring standards, testing procedures, and regulatory approval pathways for AS/DR participation.
• Commercial & Financial Modelling: Ability to quantify opportunity costs, capital expenditure, battery degradation rates, maintenance impacts, and optimal remuneration structures (e.g., capacity vs. utilisation payments).
• Market Mechanisms & Intermediation: Knowledge of bidding/scheduling workflows, gate-closure timelines, aggregator/trader roles, and contractual risk allocation.
• Operational Forecasting & Risk Management: Competence in predicting facility availability under varying production cycles, weather conditions, and market signals, while managing non-performance penalties.

Explanation of Complex Terms

• Ancillary Services (AS): Grid-support functions beyond bulk energy delivery, essential for maintaining frequency, voltage, and system stability during contingencies or sudden generation/load imbalances.
• Demand Response (DR): Controlled adjustments in electricity consumption by end-users or aggregated portfolios in response to price signals, grid emergencies, or direct dispatch instructions.
• Grid Forming (GFM) vs. Grid Following (GFL) Inverters: GFM inverters autonomously establish voltage and frequency, enabling stable operation in weak or renewable-heavy grids. GFL inverters require an existing stable grid reference to synchronise and cannot operate islanded.
• Aggregator/Trader/Retailer/Balance Responsible Party: Licensed or registered entities that pool distributed resources for market participation, facilitate electricity trading, supply non-market consumers, or manage supply-demand balancing obligations respectively.