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ID:
178813
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| Summary/Abstract |
In the context of increasing renewable energy penetration in energy systems, demand response is acknowledged as a solution to guarantee grid stability and security of supply. Direct control of appliances by utilities, however, may lead to user dissatisfaction and disengagement via overrides. The present study, based on data from 6,389 connected thermostats in North America in the summer of 2019, investigates users' thermostat overriding behavior during demand response events targeting their air conditioners. An average event in this dataset was triggered around 3 p.m. and lasted three hours. The overall override rate was 12.9%. Overrides critically affected power usage during an event, with the share of the expected power demand reduction missed due to overrides being of the same order of magnitude as the override rate. In a decision tree analysis, the override rate showed to be particularly affected by occupants' habitual setpoint change frequency, outdoor temperature, event duration, and occupants’ previous experience with demand response. Even though the dataset is not representative of all types of demand response events, this study highlights the potential lying in connected thermostat data for utilities to design tailored demand response events with an increased success rate and a smaller impact on occupant comfort.
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| 2 |
ID:
190061
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| Summary/Abstract |
The digitalisation of the energy system brings out the question of cyber threats. How this area is perceived and how cyber-security policy in the energy sector develops is driven by the most spectacular cyber-incidents. How do these events shape public perceptions about the dangers of digitalisation? To understand this, we look at the 2016 CrashOverride cyberattack on Ukraine’s grid. Hypothesising that cyber-energy security incidents are interpreted in the context of socio-technical imaginaries of the energy sector and security imaginaries linked to foreign policy, we distil four discourses that emerged around the Ukraine attack among Western experts and commentators. One represented it as evidence of an accelerating race towards disaster, another as merely a tip of the iceberg. The third portrayed it as less catastrophic than initially suggested, while the last one as part of Russia’s cyber strategy. Not all of these were picked up by the broader public debate in Western security circles, and only the more alarmist discourses had a visible impact beyond niche communities.
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