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WG C4.605 Modelling and aggregation of loads in flexible power networks

Scope:

Although loadmodelling is a mature topic with significant research and effort having been applied to this subject, there is a renewed interest in industry and academia for this important topic. The renewed interest is particularly fuelled by the appearance of new, non-conventional types of loads  (power electronics based or interfaced through power electronics) and requirements to operatemodern electric power networks with increased penetration of non-conventional types (mostly stochastic) of generation and power electronic devices in a safe and secure manner. The flexible operation of power networks of the future, both distribution and transmission, will depend evenmore on adequatemodelling of all network components. Guidelines are therefore need for: i) development of individual and aggregate loadmodels of various existing and future types of loads (e.g., electric vehicles) for steady state and transient network studies at all voltage levels; ii) load parameter identification and validation procedures and (iii) better means of capturing the non-linear and sometimes discontinuous dynamic response of loads (e.g. single phase inductionmotor load stalling etc.) In order to address the issues highlighted above this WG will:

  • Provide critical and updated overview of existing loadmodels and parameters for power system studies at all voltage levels and identify types of devices/load classes for which adequate loadmodels are missing at present.
  • Provide critical overview of existing methodologies for loadmodelling with detailed critical overview of component based and measurement based approaches. Identify clearly their advantages and disadvantages.
  • Develop a set of recommendations and step-by-step procedures for loadmodel development and validation using either component based or measurement based approaches.
  • Develop loadmodels for all typical devices and classes of customers for whichmodels do not exist at themoment and recommend typical parameter ranges for those.

Provide recommendations on developing equivalent static and dynamic models of clusters of diverse loads/generators including equivalent models of microgrids and distribution network cells.

Deliverables:
  1. A CIGRE report/guidelines formodelling and aggregation of loads in contemporary and future power networks addressing each of the points 1-5 specified above.
  2. Electra publication summarizing major conclusions and recommendations.
Convener: J. Milanovic (UK)

Progress Report 2013 (pdf, 112kB)