Abstract
Flexible loads, most of which are on/off appliances, are playing an important role in keeping the balance between power generation and demand. In this paper, a distributed consensus-based control strategy is proposed for the economic load dispatch in the frequency regulation. In order to avoid the complexity caused by the discrete cost characteristics, the continuous cost function of each user is fitted by the least squares method in advance. To minimize the overall load dispatching costs during the frequency regulation, Incremental Cost Consensus (ICC) algorithm is proposed in the load control. The economic load dispatch is realized through the convergence of the Incremental Cost (IC) of users. Case studies are provided to verify the effectiveness of the proposed method, with comparisons of different discretization methods.
Highlights
As considerable researches have demonstrated the effectiveness of demand side load control in this respect, this paper aims to realize the economic load dispatch for distributed flexible loads which participate in the frequency regulation
Case 3: Incremental Cost Consensus (ICC) algorithm is adopted for on/off loads to participate in the frequency control
In this paper, an economical distributed control strategy is designed for on/off loads to enhance the frequency stability of the power system
Summary
Fluctuations of REG would result in the unbalance between power generation and demand, making it difficult to maintain the system frequency stability [4]–[6]. To address this issue, reliable and economic approaches must be utilized to deal with the frequency oscillations caused by the high penetration of REG. A novel hierarchical demand-side load control strategy is proposed in [13] to provide the primary frequency control. It improves the inter-area oscillation damping and enhances the dynamic performance of the power system. Integrated with Battery Energy Storage System (BESS), flexible loads are employed in [17] to improve the frequency stability of the power system
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