Research Article

A Stability Analysis of Thermostatically Controlled Loads for Power System Frequency Control

Figure 8

Initial fridge distributions in -space, with labels matching those in Table 3. Pink indicates switched off fridges, and blue indicates switched on. Distributions scaled by and histograms formed of 100 bins. (a) has no perturbation to the proportion of fridges switched on, and (b) has increasing perturbation (going downwards) to the number of fridges switched on. All involve sinusoidal distribution perturbations.