DPIA and PIA Guidelines
There are various projects to create Guidelines for Data Protection Impact Assessments and Privacy Impact Assessments.
EC DPIA Template for Smart Grid and Smart Metering Systems
The Smart Grids Task Force was set up by the European Commission in 2009 to advise on issues related to smart grid deployment and development. One of the working group (WG2) is on security and privacy.
The EC has provided a Data Protection Impact Assessment Template for smart grid and smart metering systems.
The EC has decided to have a two-year trial of the template starting from March 2015.
CNIL PIA Support
CNIL is the French Data Protection Authority (DPA).
In June 2012, CNIL published a guide on privacy risk management, applicable to complex processings or high risks scenarios. It helped data controllers to get an objective understanding of the risks arising from their processings, in order to select the necessary and sufficient security controls.
This guide was updated in July 2015 to remain in line with the European Data Protection Regulation project and the WP29’s work on the risk based approach. It also considers feedbacks and improvements proposed by different interested parties on privacy impact assessments guidelines. Three documents are available:
Manual 1: PIA Methodology (how to carry out a PIA)
Manual 2: Tools (templates and knowledge bases)
In December 2017, CNIL made available an open source software for PIA
ULD PIA Guide
The "Unabhängige Landeszentrum für Datenschutz" presented a guide to DPIA's according to the GDPR at the annual privacy forum. So far it has not been published online to my knowledge but is part of the APF booklet.