Smart grids use digital technology to enable monitoring and control of the power distribution network. They improve energy efficiency and reliability and can be used to facilitate the integration of renewable energy sources.
They also allow consumers to monitor their energy usage and take action to reduce their consumption, as well as spot problems with the infrastructure so they can be fixed before they cause power outages. This FactBook provides an overview of the technologies and applications that make up smart grids.
Improved Efficiency
The smart grid’s ability to monitor real-time data enables it to deliver better efficiency. Specifically, by better balancing demand and supply to optimize electricity delivery, smart grids can reduce energy costs for everyone on the system.
For example, instead of every home turning on their dishwasher after dinner on weeknights at the same time, which would increase both demand and prices for electricity, the smart grid could send a price signal to the appliances that signals when it’s most effective to run them, allowing consumers to become micro-entrepreneurs and take advantage of lower electricity rates during off-peak hours.
The smart grid also enables two-way communication between the system and end-consumers. This is facilitated by smart meters, which allow for accurate and honest energy usage data to be sent back to your energy supplier. This allows for real-time dialogue that can help you to save energy, cut your carbon footprint and only pay for the energy you use.
Enhanced Security
Modernized distribution networks with smart technology optimize monitoring and control, support new energy uses, and enable active consumer participation. They reduce costs, improve power quality, and limit greenhouse-gas emissions.
Smart grids allow operators to detect and respond to issues more quickly, such as a faulty breaker or outage. This is because sensors and control systems monitor and exchange data, allowing them to automatically adjust to a system’s normal functioning and to identify potential problems at an early stage.
They also allow operators to better balance supply and demand by directing electricity flows based on predicted load patterns. They can enhance reliability through rapid fault detection, isolation and restoration processes, and improve power quality by ensuring that the right amount of energy is delivered to the correct places. This is possible thanks to the automation technologies embedded in smart reclosers, which make distribution networks self-healing. These capabilities depend on rigorously validated grid components and deterministic control behavior.
Enhanced Reliability
With the smart grid, information and electricity flow in both directions. This allows utilities and grid operators to have a better understanding of how consumers use electricity. For example, when all the dishwashers start running on weeknights at the same time, causing a spike in demand and prices, they can proactively send a price signal to the appliance that it’s cheaper to run it earlier or later in the day.
The smart grid also helps reduce electricity losses. Historically, around 8 percent of energy is lost as it travels over long distances from power plants to population centers. Smart grids reroute power more quickly, which prevents some outages and shortens the length of those that occur.
Lastly, smart grid technology helps integrate renewables into the power system by dynamically responding to shifts in generation from distributed sources such as rooftop solar. It does this by calling on storage resources to shift demand, using artificial intelligence to optimize charging and discharging schedules based on electricity prices forecasts, renewable energy predictions, and network conditions projections.
Better Integration of Renewable Energy
One of the primary challenges with renewable energy is its intermittency. Since wind and solar power generation fluctuate throughout the day, it’s difficult to maintain a balance between supply and demand without relying on fossil fuel-based backup energy. Smart grids provide an essential solution to this problem by monitoring electricity flows in real time and adjusting them as needed. They also help reduce energy curtailment by facilitating demand response programs that encourage consumers to alter their electricity consumption when the grid is stressed or at peak prices.
In addition, the technology used by smart grids allows them to communicate with electricity generators and other power distribution infrastructure in real time, allowing for improved efficiency and reducing technical losses. Smart grids also monitor electricity networks 24/7, enabling them to detect problems as soon as they occur and automatically isolate the affected areas to prevent outages. This self-healing feature is vital to the reliability of any electric system, but it is especially valuable for sustainable energy systems.