Sarah
Johnston

Global Head of Modelling

Phone: 01603 604400
Email: sem.johnston@cornwall-insight.com

Sarah is the Global Head of Modelling at Cornwall Insight. She has a background in electrical engineering and over eight years’ techno-economic modelling experience. Before joining Cornwall Insight, Sarah worked for WSP, consulting for a range of international stakeholders from government utilities and international financiers to start-ups and private investors. She has specialised in market simulation, generation planning and dispatch, and renewable integration studies using PLEXOS and SDDP.

Her experience includes building bespoke models for master planning the Ethiopian power system, co-optimising the power and water sectors under varying levels of inter-emirate cooperation in the UAE, and assessing the feasibility of combined solar and battery energy storage projects in GB, Senegal and the Caribbean.

Sarah leads the GB Modelling Team and supports the development and optimisation of market models that provide bespoke quantitative analysis for clients and analytics and forecasts for some of Cornwall Insight’s key energy products.

Latest thinking

Low carbon generation

GB Power Market Outlook to 2030 Q4 2022

This report provides an annual overview of trends for the GB Power Market out to 2030 using outputs from Cornwall Insight’s latest Benchmark Power Curve (BPC) for the British Electricity Market covering England, Scotland and Wales. This publication is based on comprehensive market and asset-level power price modelling that delivers...

Commercial and market outlook

Australian Power Price Trends to 2041

This report provides captured power price trends for the Queensland energy market (neutral case in line with AEMO's ISP Progressive Change scenario) from 2022 up to 2041 using outputs from Cornwall Insight Australia’s latest NEM Benchmark Power Curve (BPC), published on 26 October 2022. We hope this information is of...

Low carbon generation

GB Power Market Outlook to 2030 Q3 2022

This report provides an annual overview of trends for the GB Power Market out to 2030 using outputs from Cornwall Insight’s latest Benchmark Power Curve (BPC) for the British Electricity Market covering England, Scotland and Wales. This publication is based on comprehensive market and asset-level power price modelling that delivers...

Announcement

Australian FCAS power price trends

This report provides power price trends for the technology enablement as a percentage of total market share, using outputs from Cornwall Insight Australia’s latest Frequency Control Ancillary Service (FCAS) price curves, published on 30 August 2022. We hope this information is of value-add to you and your business. Please don't...

Low carbon generation

GB Power Market Outlook to 2030 Q2 2022

This report provides an annual overview of trends for the GB Power Market out to 2030 using outputs from Cornwall Insight’s latest Benchmark Power Curve (BPC) for the British Electricity Market covering England, Scotland and Wales. This publication is based on comprehensive market and asset-level power price modelling that delivers...

Low carbon generation

GB Power Market Outlook to 2030

This report provides an annual overview of trends for the GB Power Market out to 2030 using outputs from Cornwall Insight’s latest Benchmark Power Curve (BPC) for the British Electricity Market covering England, Scotland and Wales. This publication is based on comprehensive market and asset-level power price modelling that delivers...