Spanish PV GRID workshop - 26th March, 2014 - Madrid
Date: March 26th, 2014
Time: 10:00 – 14:00
Venue: Universidad Pontificia de Comillas. C/ Alberto Aguilera, 23, Madrid
The Spanish Workshop started with an Initial presentation by Eduardo Collado, UNEF, showing a data compilation of the project’s relevant data, structure, objectives and instruments of the PV LEGAL (previous project), to follow with a description of the PV GRID, that is challenges for large-scale integration of PV electricity into the distribution grid, the objectives were reviewed, the project’s workflows with the different Working Groups and within the project, the evaluation of the national PV development frameworks in each of the 16 participant countries, offering for every of the 3 market segments (assembly in residential, commercial and industrial land of PV systems) a description of:
• Procedures and administrative requirements to connect into the grid
• Term and costs involved
• Market barriers and solutions
It was also mentioned that the research is conducted by the National Associations of the solar industry, it is complimented with interviews to national developers of PV systems and operators and it is aimed at developers and designers of project policies.
All the information is available with free access in the PV GRID database: http://www.pvgrid.eu/database/
The summary of the research results is reviewed in order to move forward into the main task of this Project, which is the technical solutions for the PV installations connection to the grid.
Next, Pablo Frías from the Universidad Pontificia de Comillas, presents “Technical challenges of PV integration into the distribution grid”, with the following:
- Technical solutions and challenges
- Examples of integration
- Impact on the network
- Planning of technical solutions
All this, with the technical conditions and challenges defined as follows:
- Problems of frequency stability
- Voltage stability
- Management of network congestion
- Safety issues
- Capacity warranty
- Storage and communication issues
The focus have been on the first two points, that is voltage and frecuency.
It was mentioned the islanding initial problem (years 2008-2009) and how problems have been solved, due to an increasingly demanding conditions, it has come to a compromise, that although the creation of islands, we can have synchronous generators connected, and it is increasingly difficult to create this islands.). The electricity companies’ representatives state that islanding is still taking place twice or three times a year.
Problems in Italy are reviewed, such as how in some parts of the network reverse power flows take place in the transformers MT/BT y AT/MT, due to PV generation.
It is also mentioned that in Germany, storage is being promoted to prevent these problems as far as possible; in addition to obtaining the benefits of using stored energy whenever it is required removing the need to transport energy so much.
There have also been voltage problems and to solve it several technical solutions have been studied.
Those technical solutions have been listed and studied in depth.
Finally Carlos Mateo from the Universidad Pontificia de Comillas, makes a presentation about all barriers and its solutions:
- Regulations preventing power reduction to renewable energies except for safety reasons
- Insufficient framework for self-consumption
- Insufficient access for DSO to advanced functions of the investor
- Insufficient framework for storage solutions in the consumer – generator
- Insufficient framework for DSO storage solutions
- Insufficient framework for the active management of the demand
- Insufficient framework of smart meters
- Regulatory frameworks do not stimulate Smart Grids
All the participants in the Forum discussed about the abovementioned barriers, reaching very useful conclusions.