Decentralized synergetic dispatch considering operating risk of interconnected power systems

摘要

Locational marginal price (LMP) is a market-pricing method used to determine optimal dispatch of interconnected power systems. In order to take system's operating risk into consideration, a modified risk-based LMP (RLMP) calculation method is given in this paper. We design a risk-based decentralized synergetic dispatch pattern in electricity market environment to avoid the drawbacks of centralized dispatch. A double-layer optimization model is considered. In the lower level, local dispatch centers operate autonomously to arrange their own generation plans and guarantee the risk constrains. In the upper level, the main dispatch center compares the updated RLMP curves sent from the lower level and figures out ideal power flows on tie lines to achieve the highest social welfare. Three different synergetic strategies for various system structures are respectively demonstrated. The validity and effectiveness of the proposed approach in interconnected power systems are illustrated on a 6-bus system and a three-area 42-bus system.