Project Case Study

20MVA BATTERY ENERGY STORAGE SYSTEM

20MVA battery energy storage compound housing eleven battery units, six transformers and separate DNO and client switchrooms.

High Voltage Engineering · NERS-Accredited Independent Connection Provider

Voltage

33kV

Capacity

20MVA

Sector

Renewable / Storage

Delta HV Role

Tier 2 HV specialist contractor

Client

JSM (Tier 1 Principal Contractor)

Project Overview

Delta HV delivered the electrical engineering, installation and commissioning scope for a 20MVA battery energy storage compound housing eleven battery units, six transformers and separate DNO and client switchrooms. Delta HV produced the detailed electrical design and gained DNO and client approval, procured and installed the 33kV switchgear, auxiliary transformer and secondary systems, and took the site through cold and hot commissioning to energisation, adoption and as-built handover alongside the DNO's own non-contestable works.

Scope of Works

Electrical Protection Design

Substation Engineering

Installation

Procurement

Commissioning & Adoption

Energisation

Description & Overview of Works

What Delta HV Delivered

Electrical protection design

33kV protection and interface design, protection drawings, settings and grading, and G99 and power system studies supporting DNO and client design approval.

Substation engineering

DNO substation design, auxiliary transformer design for the site LVAC supply, battery sizing calculations and equipment schedules, cable schedules and calculations, and earthing design and reporting.

Installation

Installation and commissioning of a 2-panel 33kV switchboard and ancillary equipment within a GRP enclosure, auxiliary transformer and LVAC supplies, DNO and client switchroom fit-out, protection panels and secondary wiring, and terminations to 700m of on and off-site 33kV cable plus fibre and inter-battery connections.

Procurement

Procurement of protection relays and panels, auxiliary transformer, battery chargers and DC systems, metering, LVAC distribution, and HV terminations and accessories.

Commissioning & adoption

Cold commissioning, secondary injection, settings application and verification, functional and interface testing, witnessed DNO adoption testing, and delivery of the as-built and completion pack.

Energisation

Hot commissioning, on-load testing and energisation of the 33kV switchboard, transformers and BESS plant, followed by completion and handover.

technical highlight

Interface with non-contestable works

The DNO's non-contestable works were executed by their own contractor alongside Delta HV within an already constrained compound. Delta HV worked to a programme that carried the non-contestable scope alongside the contestable works and held regular site liaison meetings with the DNO, keeping switchgear delivery, cable terminations and commissioning sequenced without clash or standing time.

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Unit D3 / D2
‍Chaucer Business Park
Dittons Road
Polegate
BN26 6QH
‍
01323 700036
info@deltahv.co.uk

20MVA BATTERY ENERGY STORAGE SYSTEM

Scope of Works

What Delta HV Delivered

Interface with non-contestable works

Need to share this offline?

RECENT CASE STUDIES

2MVA 11kV EV CHARGING STATION CONNECTION

300MW 132/33kV DATA CENTRE DESIGN

132kV ENERGY-FROM-WASTE CONNECTION

Talk to us about your project

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