Renewable energy is growing exponentially in  recent years thanks to new energy transition  policies based on the promotion of renewable  energy, technological advances, the large-scale  deployments, the monopolization of the renewable  industry, the significant fall in prices in the  world market, and of course the global awareness  of the multifaceted risks of climate change and  the urgent need to curb carbon emissions into the  atmosphere. 
    With a growth rate of 8.5% in 2015 (newly  installed 153 gigawatts in 2015), the renewable  installed capacity in 1985 reached a record GW,  according to the International Renewable Energy  Agency (IRENA) (1) driven mainly by solar with 26%  (47 GW newly installed in 2015), a cumulative  installed capacity of 219 GW of solar photovoltaic  and wind power with 17% (63 GW newly installed in  2015), a cumulative installed capacity of 416 GW .  IRENA provides that the costs of onshore wind  should decrease from 26% in 2025 compared to 2015,  those of offshore wind (at sea) of 35%, while  those of solar PV could fall 59%, which would  allow renewable crossing the threshold of 40% of  the total electricity generation by 2030. the same  agency shows that in 2015 the number of direct and  indirect jobs in the field of renewable increased  5%, or 8.1 million people worldwide and is  expected to reach 24 million in 2030. 
    For its part, the report “New Energy  Outlook 2016″, the consulting firm Bloomberg  New Energy Finance (BNEF) (2), which made  projections to 2040, shows the United States,  renewable energy going from 14% in 2015 to 44% of  the electricity mix in 2040, while in Europe they  move from 32% in 2015 to 70% in 2040. This  profound change in the global electrical system is  driven by the continued decline in prices of solar  and wind power technologies. From 2020,  electricity from solar and wind renewable sources  would be competitive in several countries of the  world. 
    However, despite this dramatic development,  solar and wind power are largely different from  fossil fuels like coal, oil and gas, new energy  sources such as nuclear and even other renewable  energies such as hydropower and biomass where  electricity is generated continuously, day and  night. It can operate a nuclear power plant or  coal in a continuous manner throughout the night,  while we can not do it with a solar plant. 
   The production of electricity from solar and  wind power is dependent on solar radiation and  wind, respectively. 
    This variability or intermittent solar and  wind was cited recurrently, often by the lobbies  of conventional energy and nuclear, to suggest  that the production of electricity from these  sources energy can not exceed 15 to 20% of all  electricity injected into the grid (electric grid  or English). Yet new studies show that it is  possible to achieve very high penetration rate of  the production of solar and wind power in the  network, such as the case in Portugal that  operated with 100% of the wind, solar and hydro  for four days last May and Texas, which reached a  record 45% just with the wind. Such situations are  repetitive in Germany where the renewable  currently covers one third of the electricity  production and could exceed 80% in 2050. For  example, on May 8, solar and wind power covered  more than 90% demand of electricity in the  country. However, to spare an important  penetration, smart and sophisticated technology  network management (smart grid) and real-time  response to the demand for electricity had to be  deployed. 
    A fundamental change or a disruption in the  electrical system management mode had to be  operated in countries where renewable occupies  more and more of the terrain and becomes  competitive with fossil and nuclear energy. 
   The proliferation of storage technologies for  large-scale energy, including storage batteries of  electric current and the intelligent management of  application / consumption of electricity or the  electricity market (smart market) are all  recommended solutions by experts to overcome the  intermittent and random nature of solar and wind  power and to allow an even greater deployment of  these clean energy sources in the future. To  better manage the network, the network operator  must know, at any given time, how many solar and  wind power will be fed into the grid and order, in  case of excess, reducing the production of  electricity from gas or other fossil fuels. Models  and prediction tools for the production of  renewable electricity that convert weather  forecasting algorithms and non-linear functions  are deployed to reduce unnecessary consumption of  fossil and avoid emissions of greenhouse gases.  
    One way to solve the problem of  intermittency of renewables lies in the storage of  energy which is essential for increasing the share  of renewables in the network. The batteries are  used to store electrical energy generated by the  systems to renewable energy sources when there is  an excess and then return to the time of  application. The large-scale energy storage  remains today very expensive to deploy, but that  should change, especially as even more significant  penetration of renewable makes it more  economically viable deployment because of the need  for additional services that it can provide. New  energy storage markets will be created and new  models of fiscal incentives like nature for the  use of storage systems to the network or  residential scale (storage of energy generated by  photovoltaic solar modules) will the day. 
    The report evaluates the BNEF battery market  to $    250 billion. 
  Another alternative  would be the management of electricity according  to the response to the request  “demand-response”, that is to say  attract large electricity consumers or group of  individuals, qualified as “interactive  grid” to lower consumption at key times of  the day when the network is experiencing strong  demand, with compensation mechanisms (special  rates or fiscal or quasi-fiscal incentives). The  development of smart markets and the means of ICT  has also made this possible and viable solution.  Electric vehicles could be another option  electricity storage and management of peak  consumption. It also cites the mobile photovoltaic  “PV mobile” as solution of  “back-up”. Electric cars will account  for 35% of new vehicle sales in the world in 2040,  41 million cars, according to the report of BNEF.  
    In the digital era, technologies are  advancing at such a speed that we suggest that it  is very possible that smart grid technologies and  energy storage become good medium-term market, as  already the case for renewable, and will partner  with solar and wind power to produce a simple  grid. 
    Furthermore, the implementation of the Paris  Agreement on climate change will be an opportunity  for the development of green energy and  development of energy storage technologies and  smart grid management. This agreement aims to  contain global warming below the limit of 2 ° C  compared to pre-industrial times, putting in place  support mechanisms for the deployment of clean  energy and a regulation increasingly severe with  the use of carbon energy sources. Algeria has  adopted, on a voluntary basis, a renewable energy  development program to generate 22,000 MW by 2030  and diversify its energy mix and preserve its  export capacity of oil and gas. To deploy this  ambitious program that aims to increase the share  of renewables to 27% in the national electricity  mix by focusing primarily on sources of  intermittent renewables such as solar photovoltaic  
  (13,750 MW) and wind power (5010 MW), new  technologies and digital solutions listed above  should be necessarily included in its  implementation. 
    The completion of this strategic objective  inevitably will lead to a fundamental  transformation of the national electricity system  and its management. research centers and  university laboratories should give importance to  these multidisciplinary research projects that  combine renewable with the Information and  Communication Technology (ICT). The Renewable  Energy Development Center (CDER), aware of this  primordial energy issue for our country, has  already made a priority in its strategic plan for  2020 by working hand in hand with relevant sectors  so as to address these major technological  challenges. The pilot stations, solar photovoltaic  (1.1 MW), solar thermal (25 MW solar) and wind (10  MW), added to that the 20 solar power plants (343  MW) installed in the Highlands and the South  should serve as experimental platforms to gain  experience, develop skills and learn to better  deploy the program outlined by the government.  Regions where the share of renewable is important,  as the case of Adrar, could be used to test these  new intelligent network management technologies.  Algerian authority fully versed in new technology  will easily meet the challenges of the third  revolution is that of renewable and digital. The  economic sector eager to embark on this promising  niche, creator of wealth and jobs, should also  take these aspects into their business plan. 
     Reference  
  1)  – http://www.irena.org 
  2) –  http://www.bloomberg.com/company/new-energy-outlook/