Commonwealth Associates, Inc.

Experience the power of partnership.

Website

About the firm

Commonwealth Associates, Inc. provides power and energy engineering services, drawing on decades of experience in transmission and distribution systems, substations, renewable energy, and power generation. The practice delivers engineering across renewable energy integration, solar PV, battery energy storage, microgrids, power delivery infrastructure from 2.4 kV to 765 kV, conventional power generation, and specialized technical studies such as grid integration, arc flash, transient stability, and NERC compliance. It serves electric utilities, independent power producers, industrial and institutional owners, municipalities, and renewable energy developers.

Team
Midsize
Firm type
Electrical Engineering · Power & Utility Engineering · Owner's Engineer · EPC

Capabilities

Renewable Energy Engineering

Service website

Comprehensive planning and engineering for solar PV, battery energy storage systems, collector stations, microgrids, EV integration, and owner's engineer services.

  • Solar PV Design

    Detailed electrical engineering and layout design for photovoltaic generator collector systems.

  • Battery Energy Storage Systems

    Engineering, grid interconnection planning, and support for utility-scale battery energy storage installations.

  • Collector Station Services

    Substation and electrical collector design for wind and solar facility interconnections.

  • Microgrids

    Engineering of integrated localized grids incorporating distributed generation, storage resources, and advanced controls.

  • EV Integration

    Infrastructure design and system engineering to integrate electric vehicle charging with the power grid.

  • Project Development Services

    Feasibility planning, project definition, and owner's engineering to support early-stage renewable projects.

Power Delivery

Service website

Grid modernization, substation engineering from 2.4 kV to 765 kV, protection and controls, transmission and distribution design, right-of-way, and data center electrical infrastructure.

  • Transmission & Distribution Design

    Overhead and underground line design, structural engineering, and line routing.

  • Substation Engineering

    Comprehensive physical and electrical design for utility, collector, and switching stations up to 765 kV.

  • Protection & Controls

    System design, relay settings, coordination studies, and RTU configuration.

  • Underground Transmission

    Cable system design and engineering for high-voltage underground power transmission lines.

  • Land & Right of Way Services

    Siting, routing, permitting support, and right-of-way planning for infrastructure projects.

  • Data Center Services

    Power delivery studies and electrical infrastructure design to support critical mission facilities.

Power Generation

Service website

Engineering support for conventional, thermal, and alternative power generation, including CHP systems, central utility plants, plant betterment, and small modular reactor integration.

  • Reciprocating Internal Combustion Engine (RICE) Systems

    Design and optimization of RICE power generation installations.

  • Combined Heat & Power (CHP)

    Thermal and electrical integration design for high-efficiency cogeneration facilities.

  • Central Utility Plants

    Engineering of boilers, chilled water systems, and associated high-energy piping systems.

  • Plant Betterment

    Asset life extension, retrofits, regulatory compliance upgrades, and efficiency improvements.

  • Coal Conversion

    Engineering studies and designs for converting coal generation facilities to alternative fuels.

  • Small Modular Reactor (SMR) Services

    Consulting and balance-of-plant engineering support for SMR deployment.

Studies and Consulting

Service website

Analytical and strategic consulting services, including grid integration, NERC compliance, electrical studies, arc flash analysis, and lifecycle cost assessments.

  • Grid Integration Studies

    Interconnection and grid-code compliance evaluations for new generation projects.

  • Arc Flash & Short Circuit Analysis

    Hazard analysis and short circuit calculations to ensure operational safety and compliance.

  • Transient Stability Analysis

    Dynamic system stability modeling and performance evaluations under transient conditions.

  • NERC Compliance

    System protection reviews, compliance documentation, and engineering support for regulatory reliability standards.

  • Feasibility & Planning Studies

    Economic and technical evaluations of proposed generation, storage, and transmission assets.

  • Power Process Analysis

    Load flow, harmonic, and system capability studies using industry-standard software.

Environmental and Permitting

Service website

Environmental planning, desktop and field screening, and regulatory permitting support for power infrastructure developments.

  • Environmental Site Screening

    Desktop and field assessments to identify regulatory and ecological constraints.

  • Wetland Delineation

    Field identification and mapping of wetland boundaries for power infrastructure projects.

  • Habitat & Species Surveys

    Targeted surveys for rare or endangered species to support project planning and environmental approvals.

  • Cultural Resource Evaluation

    Evaluating cultural and historical resources as part of environmental review processes.

  • Permitting & Compliance Support

    Preparing agency applications and coordinating compliance throughout project development.

Industries

Electric Utilities · Power Transmission & Distribution · Renewable Energy · Power Generation · Industrial · Manufacturing · Education · Healthcare · Government · Data Centers · Solar · Energy Storage

Projects

Southwest Battery Interconnection

Texas · Energy Storage · 2023

Project details

Provided distribution and interconnection engineering for a utility-scale battery energy storage system.