In larger grid networks with low penetration of solar and wind, the intermittent output from solar and wind can be balanced by reliance on other generation and energy storage systems, states the international market analyst firm.
On the other hand, in independent grids, it is harder to balance the intermittent output from renewables especially if the share of renewable resources is relatively high.
Renewable energy integration
However, to address such an issue, utilities need to integrate accurate weather forecasting and local demand projection into their supply-demand balancing.
Forecasting will cover projections of electricity demand as well as output from renewable resources taking into account detailed weather conditions.
In so doing, utilities will possess an efficient grid control function which will assist them towards their grid reliability and efficiency as well as optimised operations in a majority of their departments.
The control function will integrate four grid operation components including the supply demand operation plan, economic dispatch, load frequency control and real time balancing.
The supply-demand operation plan will help the utilities to analyse the total output from renewable resources to determine whether they should compliment the output with power from other generation and storage facilities.
By implementing the economic dispatch, utilities will be able to optimise the dispatch order of each power plant to achieve the lowest cost generation mix overall, whilst the load frequency control will ensure a reliable control of the frequency power grid within the target range.
Real time balancing will ensure supply and demand remain in balance.
To help utilities meet up their demand and supply, the Bloomberg New Energy Finance in collaboration with Mitsubishi UFJ Research and Consulting, compiled a whitepaper taking into consideration the lessons learnt from a smart grid pilot implemented by Japan’s power utility Fuji Electric.
The project ‘Community Energy Management System’ was aimed at realising resilient and sustainable energy infrastructure in Kita Kyushu, Japan.
Under the project, the utility in partnership with a number of technology companies including IBM, deployed a number of programmes and technologies including energy management systems.
According to the whitepaper, by implementing energy management system programmes, utilities in developing economies would improve the quality of electricity service by ensuring better balance between and demand, as well as, improve the integration of renewable energy resources and storage facilities.