The Influence of Deployment of DSM on Power System Angular and Frequency Transients and Stability

Abstract

Demand side management (DSM) has become one of the most effective methods to enhance and improve power system flexibility and stability, which are challenged by high operational variability and uncertainty of modern and future power systems. However, by manipulating load consumption patterns and compositions, DSM can be considered as a disturbance, and it may endanger system stability when the system is transferring from pre-DSM to post-DSM operating points. The paper illustrates system transient behaviour following a DSM deployment using a Monte Carlo simulation based probabilistic analysis. It also demonstrates advantages of applying time delays between DSM actions as a potential mitigating solution. By emphasising the importance of the transient period following the actual deployment (connection or disconnection of demand) of DSM for overall system angular and frequency stability, it contributes to better planning and implementation of DSM in power systems. All simulations have been performed in a mixed Matlab and DigSilent/PowerFactory environment and illustrated using a modified version of the IEEE 68-bus test system.