14Solar PV in the 100% RES Power System

Operating agents


The main goal of Task 14 is to promote the use of grid-connected PV as an important source in electric power systems at the higher penetration levels that may require additional efforts to integrate dispersed generators. The aim of these efforts is to reduce the technical barriers to achieving high penetration levels of distributed renewable systems.


Task 14 will focus on electricity grid configurations with a high penetration of RES, where PV constitutes the main RES. Although up to now no common definition of “high-penetration PV scenarios” exists, there is consensus amongst the parties developing this Task that a high penetration situation exists if additional efforts will be necessary to integrate the dispersed generators in an optimum manner.

Task 14 will analyze the issues related to the penetration of PV in electricity grids and establish penetration scenarios in order to guide discussions on respective technical challenges. Key aspects which influence this definition can include:

  1. characterization of the load (worst case, average, peak, load shapes, seasonal aspects…)
  2. AC output characteristics of PV (seasonal, daily, spatia)
  3. influence of the grid characteristics (e.g. grid topologies, impedances, etc.)


A certain number of distribution system integration-related issues are emerging first for PV systems, Task 14 will focus on working with utilities, industry, and other stakeholders to develop the technologies and methods to enable the widespread deployment of distributed, grid-connected PV technologies.

Task 14 aims to:

  1. develop and verify mainly technical requirements for PV systems and electric power systems to allow for high penetrations of PV systems interconnected with the grid
  2. discuss the active role of PV systems relating to energy management and system control of electricity grids.

Task 14's current phase began in 2018, ends in 2022 and activities are organized as follows

11 Subtask A - Dissemination and Outreach

  • Events and workshops
  • Dissemination materials
  • “Task 14 Wiki”
  • Coordination with other tasks and initiatives
  • Outreach to emerging economies and new PVPS members

22 Subtask B - Operating and planning power systems with 100% PV and RES

  • Integration studies (Methodologies, transmission – distribution,
    PV + other RES integration)
  • Ancillary services delivered upstream from distribution to transmission
  • Evolving Role of PV (from passive generator to ancillary service provider)
  • Dynamic performance of systems with declining inertia
  • Reliability and resilience of power systems with high PV+RES share
  • Evolving grid codes and regulatory frameworks
  • PV in micro grids
  • Value/Cost of integration options, market design and operation aspects
  • Analysis of grid disturbances and the actual or potential role of PV
  • Solutions for high RES share in emerging power systems

33 Subtask C - PV in the Smart Grid

  • Collection and analysis of demonstration projects of communication and control concepts
  • Data Model and Data Acquisition for PV registration schemes and grid connection – Best Practice and Recommendations
  • PV curtailment practices in IEA countries
  • Smart Inverters and Power Interfaces
  • IT-related aspects of smart-grid integration of PV, incl. cyber security
  • Smart PV grid recommendations for different kinds of infrastructures.

Task 14 Reports