US non-profit organisation Smart Grid Interoperability Panel has issued an updated version of a paper released in 2014 addressing the issue of system stability arising from broadcasting real-time pricing to devices.
‘Smart Grid System Stability with Broadcast Communications‘ expands upon ‘Broadcast-based H2G Communication Solutions’ looks at the concept of stability as based on system control theory.
The paper presents various control strategies to enable optimisation of the intended operational goals while ensuring system stability.
For the purpose of this paper, real-time pricing can be in many forms such as wholesale, locational marginal price, retail, time of use, predictive, critical peak pricing or emergency.
There can also be two types of price streams: those that the customer is actually paying, and those that the customer is not.
For either, there doesn’t need to be any restriction on how the price is determined, states the paper. The one most useful to a utility is the price stream that most effectively balances instantaneous supply and demand.
Radio broadcast for real-time pricing
The report first outlines the benefits of radio broadcasting as a powerful and low-cost method to reach a large number of energy-consuming devices including no limit to multipoint receiving devices, nearly instantaneous and simultaneous message delivery, easy to install/setup, acceptance by consumers and amenable to convenient mass deployment.
The scope of the system under study is primarily broadcasting prices to devices with implications not only for Demand Response but also for renewable generation and Transactive Energy architectures.