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Volt/VAR optimization

To sustain the energy supply expansion, utilities are looking into emerging smart grid technologies in order to find methods to optimize their network. 
Eaton's CYME Volt/VAR Optimization module is a powerful tool that helps find the optimal way to operate the distribution network so that current and future demand can be met through energy efficiency improvement and demand reduction. The module simulates a Volt/VAR management application. Simulating such a system gives crucial information such as the switching of capacitors and optimal tap positions of voltage regulators and LTCs leading to loss and demand reduction. Utilities can know beforehand how much their network can be improved taking into account power factor, kvar constraints, voltage limits and varying loading conditions.

Volt/VAR optimization module


Eaton's CYME Volt/VAR Optimization module capabilities include:

  • Conservation Voltage Reduction (CVR) analysis
  • VAR optimization analysis
  • Capacitor priority sequencing by defining capacitor switching priority
  • Multiple power system constraints
  • Single load scaling factor or multiple load scaling factor
  • Economical benefits evaluation
  • User-defined voltage profile charts and tabular reports

CVR and VAR optimization

Eaton's CYME Volt/VAR Optimization module can perform:

  • VAR Optimization
  • Conservation Voltage Reduction (CVR)

The Conservation Voltage Reduction objective is contrary to the normal approach of operating Volt/VAR control devices individually. It recommends concurrent device settings for shunt capacitors, load tap changers and voltage regulators all at the same time to recommend the optimal settings for the devices.

Multiple system constraints

Optional constraints can be applied to a given simulation such that the analysis considers them when making a setting recommendation. Constraints include:

  • Minimize active power demand
  • Minimize active power losses
  • Remove abnormal conditions
  • Power factor constraint at substation or at multiple selected devices
  • Reactive factor constraint at substation or at selected devices

Load factors and capacitor sequencing

A single load factor or a user-defined load scaling table can be used. With multiple load scaling factors, capacitor bank sequencing can be selected to meet varying power factor needs.

Through illustrative charts and reports, the module will provide a comprehensive Volt/VAR control device management analysis to help you find viable ways to save energy.

Magnetic fields

The reduction in active power generation and the decrease in active power loss brought by the module are both measurable.

With Eaton's CYME software, Volt/VAR optimization case studies can be built and the annual savings of different scenarios compared.

Since the module helps alleviate overloading conditions, installations of new equipment can be postponed and maintenance costs reduced, resulting in further savings.

Real-time simulation with CYME Server

Eaton's CYME Server solution offers a complete Service Oriented Architecture solution that is embedded into your enterprise applications. It is possible to perform quasi real time Volt/VAR management studies to quickly respond to any network change.

Need product support?

CYME users portal:

P: 450-461-3655 or 800-361-3627 (Canada and US)


Questions before you buy