Nair, Nirmal-Kumar (2004-12). Incorporating voltage security into the planning, operation and monitoring of restructured electric energy markets. Doctoral Dissertation. Thesis uri icon

abstract

  • As open access market principles are applied to power systems, significant changes are happening in their planning, operation and control. In the emerging marketplace, systems are operating under higher loading conditions as markets focus greater attention to operating costs than stability and security margins. Since operating stability is a basic requirement for any power system, there is need for newer tools to ensure stability and security margins being strictly enforced in the competitive marketplace. This dissertation investigates issues associated with incorporating voltage security into the unbundled operating environment of electricity markets. It includes addressing voltage security in the monitoring, operational and planning horizons of restructured power system. This dissertation presents a new decomposition procedure to estimate voltage security usage by transactions. The procedure follows physical law and uses an index that can be monitored knowing the state of the system. The expression derived is based on composite market coordination models that have both PoolCo and OpCo transactions, in a shared stressed transmission grid. Our procedure is able to equitably distinguish the impacts of individual transactions on voltage stability, at load buses, in a simple and fast manner. This dissertation formulates a new voltage stability constrained optimal power flow (VSCOPF) using a simple voltage security index. In modern planning, composite power system reliability analysis that encompasses both adequacy and security issues is being developed. We have illustrated the applicability of our VSCOPF into composite reliability analysis. This dissertation also delves into the various applications of voltage security index. Increasingly, FACT devices are being used in restructured markets to mitigate a variety of operational problems. Their control effects on voltage security would be demonstrated using our VSCOPF procedure. Further, this dissertation investigates the application of steady state voltage stability index to detect potential dynamic voltage collapse. Finally, this dissertation examines developments in representation, standardization, communication and exchange of power system data. Power system data is the key input to all analytical engines for system operation, monitoring and control. Data exchange and dissemination could impact voltage security evaluation and therefore needs to be critically examined.
  • As open access market principles are applied to power systems, significant changes
    are happening in their planning, operation and control. In the emerging marketplace,
    systems are operating under higher loading conditions as markets focus greater attention
    to operating costs than stability and security margins. Since operating stability is a basic
    requirement for any power system, there is need for newer tools to ensure stability and
    security margins being strictly enforced in the competitive marketplace. This dissertation
    investigates issues associated with incorporating voltage security into the unbundled
    operating environment of electricity markets. It includes addressing voltage security in
    the monitoring, operational and planning horizons of restructured power system.
    This dissertation presents a new decomposition procedure to estimate voltage
    security usage by transactions. The procedure follows physical law and uses an index
    that can be monitored knowing the state of the system. The expression derived is based
    on composite market coordination models that have both PoolCo and OpCo transactions,
    in a shared stressed transmission grid. Our procedure is able to equitably distinguish the
    impacts of individual transactions on voltage stability, at load buses, in a simple and fast
    manner.
    This dissertation formulates a new voltage stability constrained optimal power flow
    (VSCOPF) using a simple voltage security index. In modern planning, composite power
    system reliability analysis that encompasses both adequacy and security issues is being
    developed. We have illustrated the applicability of our VSCOPF into composite
    reliability analysis.
    This dissertation also delves into the various applications of voltage security index.
    Increasingly, FACT devices are being used in restructured markets to mitigate a variety
    of operational problems. Their control effects on voltage security would be
    demonstrated using our VSCOPF procedure. Further, this dissertation investigates the
    application of steady state voltage stability index to detect potential dynamic voltage
    collapse.
    Finally, this dissertation examines developments in representation, standardization,
    communication and exchange of power system data. Power system data is the key input
    to all analytical engines for system operation, monitoring and control. Data exchange
    and dissemination could impact voltage security evaluation and therefore needs to be
    critically examined.

publication date

  • December 2004