Glossary by "B"

  • 148

    Backup Power (Reliability)

    This electric service reliability application focuses on the need for back-up power systems at Commercial and Industrial facilities. Usually, the facilities use a combination of batteries for ride-through of momentary outages and then have a diesel generator for longer duration outages.

    Source: ESA Technical Working Group
  • 149

    Balancing authority

    Acronym(s): BA

    The responsible entity that integrates resource plans ahead of time, maintains load-interchange-generation balance within a balancing authority area (BAA), and supports Interconnection frequency in real time.

  • 150

    Balancing authority area

    Acronym(s): BAA

    The collection of generation, transmission, and loads within the metered boundaries of the Balancing Authority.  The Balancing Authority maintains load- resource balance within this area.

  • 151

    Base load

    The minimum amount of electric power delivered or required over a given period at a constant rate.  

  • 152

    Baseload generation

    Electricity generation designed/intended to operate constantly almost all of the time.

    Source: ESA Technical Working Group
  • 153


    1. Two or more electric cells connected together electrically. In common usage, the term “battery” is also applied to a single cell, such as a household battery. 2. A system comprised of identical electrochemical cells.

    Source: ESA Technical Working Group and AA Portable Power Corp.
  • 154

    Battery electric vehicle

    Acronym(s): BEV

    A battery electric vehicle (BEV) is a type of electric vehicle (EV) that uses chemical energy stored in rechargeable battery packs. BEVs useelectric motors and motor controllers instead of internal combustion engines (ICEs) for propulsion.

    Source: ESA Technical Working Group
  • 155

    Battery electricity storage

    Acronym(s): BES

    Large scale battery systems connected to the electrical grid for both power and energy Storage

    Source: ESA Technical Working Group
  • 156

    Bilateral transaction

    A transaction between two willing parties who negotiate an agreement. For example, the sale of electricity from an Independent Power Producer (IPP) to utility customers and other large customers is often the result of a bi-lateral transaction.  

  • 157

    Black start

    Black start service is the ability of a generating unit to start without an outside electrical supply, or is the demonstrated ability of a generating unit with a high operating factor to automatically remain operating at reduced levels when disconnected from the grid. Black start service is necessary to help ensure the reliable restoration of the grid following a blackout.

  • 158

    Black start capability plan

    A documented procedure for a generating unit or station to go from a shutdown condition to an operating condition delivering electric power without assistance from the electric system.  This procedure is only a portion of an overall system restoration plan.  

  • 159

    Bulk electric system

    As defined by the Regional Reliability Organization, the electrical generation resources, transmission lines, interconnections with neighboring systems, and associated equipment, generally operated at voltages of 100 kV or higher.  Radial transmission facilities serving only load with one transmission source are generally not included in this definition.

  • 160


    Operation of the Bulk Electric System that violates or is expected to violate a System Operating Limit or Interconnection Reliability Operating Limit in the Interconnection, or that violates any other North American Electric Reliability Corporation (NERC), Regional Reliability Organization, or local operating reliability standards or criteria.