Stochastic Unit Commitment of Wind-Integrated Power System Considering Air-Conditioning Loads for Demand Response

Abstract

Abstract:As a result of extensive penetration of wind farms into electricity grids, power systems face enormous challenges in daily operation because of the intermittent characteristics of wind energy. In particular, the load peak-valley gap has been dramatically widened in wind energy-integrated power systems. How to quickly and efficiently meet the peak-load demand has become an issue to practitioners. Previous literature has illustrated that the demand response (DR) is an important mechanism to direct customer usage behaviors and reduce the peak load at critical times. This paper introduces air-conditioning loads (ACLs) as a load shedding measure in the DR project. On the basis of the equivalent thermal parameter model for ACLs and the state-queue control method, a compensation cost calculation method for the ACL to shift peak load is proposed. As a result of the fluctuation and uncertainty of wind energy, a two-stage stochastic unit commitment (UC) model is developed to analyze the ACL users' response in the wind-integrated power system. A simulation study on residential and commercial ACLs has been performed on a 10-generator test system. The results illustrate the feasibility of the proposed stochastic programming strategy and that the system peak load can be effectively reduced through the participation of ACL users in DR projects.

Stochastic Unit Commitment Problem, Incorporating Wind Power and an Energy Storage System

“…Thus, today's power system operators extended the classical models of several problems in order to consider the intermittency of WP [4]. The unit commitment problem (UCP) of wind energy has been one of the most studied problems over the last few years [5][6][7][8]. The UCP aims to determine which units have to be committed/uncommitted from an economic perspective [9].…”

Consumer flexibility driven energy management for air conditioning systems in a building community

“…To this end, the model for an ACS of a residential building is introduced in this section. Some methods are presented in the literature to establish the model of an HVAC system or a load model for ACSs [38]. For instance, the methods of cooling and heating load calculations [39], measuring historical data [40,41], physically-based electrical model [42], and simplified equivalent thermal parameter (ETP) model [43,44].…”

“…The method of cooling and heating load calculations is based on a systematic and stepwise procedure and has simpler principles. However, this method may require complex calculations and have weakness in accuracy [38]. Building the model of an HVAC system by measuring the historical data is another method but may not give the results of sufficient accuracy.…”

Impact Evaluation of Electric Vehicle Parking on Solving Security-Constrained Unit Commitment Problem

“…Because of the increasing rate of electric power consumption and demand, most of the power industry is open to extending novel methods and technologies [17,18]. Economic and environmental issues are important factors that have attracted the interest of researchers to pursue this field of research [19]. However, success in the efficient utilization of V2G technology is highly dependent on how to schedule these V2G units in limited parking lots.…”