Abstract
In this paper, a new Distribution Management System (DMS) framework based on security region is proposed. First, the concept of Distribution System Security Region (DSSR) is introduced. DSSR is capable to describe the N − 1 security boundary of the whole distribution network, including the secure output range of DGs. This new theoretic tool provides a chance for the implementation of real-time security analysis and active controls in DMS. Second, this paper proposes and describes five security states for distribution system. Third, an upgraded DMS enhanced with DSSR is proposed, which consists of advanced security functions such as preventive and predictive control of the trajectory of operating points. Finally, a practical case is presented to simulate the proposed DSSR-enhanced DMS, in which both the security region of network and the output range of DGs are calculated. Typical security functions are also demonstrated. In conclusion, the new DMS framework aims to help operate the system closed to its security boundary in order to improve the efficiency significantly within same security standard. This work is beneficial for future low carbon distribution systems with high penetration rate of DGs.
Highlights
Climate change is recognized as one of the key challenges the world is facing in the 21st century
The problems aroused by distributed generations (DG) and electric vehicles have been studied in the research of Active Distribution Network (ADN) [8,9,10,11], on-line security assessment and control is rarely involved
The operating point WA outside the security boundary is adjusted to WB, which is inside the security region
Summary
Climate change is recognized as one of the key challenges the world is facing in the 21st century. Flexible network configuration and operation mode under distribution automation (DA) provide the great potential to improve operation efficiency and assets utilization resulting in less grid construction [4, 5]; on the other hand, smart grid introduces large amounts of renewable distributed generations (DG) into the distribution systems. These DGs produce far less CO2 than traditional thermal power, and may reduce power losses [6,7,8]. A new DMS framework based on DSSR for future low carbon distribution networks is proposed in this paper. A practical case demonstrates the advanced security functions of future DMS
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