Abstract
• The paper proposes a diagnostic faults method constructed with logical functions of alarm, measurement and control, protection and fault recording in distribution networks cyber physical system, the action characteristics and states of elements comprehensively resolve by considering the malfunction and refusal of protection action and circuit breaker as well as the omission and false alarm information; • IEC61850 is used to construct the flexible configuration of system information and physical equipment, the functional layout and communication flow of protection switches and circuit breakers are established to the construction of the fault diagnosis, the cyber physical system interaction process of the system can be realized; • GOOSE message analyzes the protection and circuit breaker situations to establish the information model with measurement and control, protection and fault recording logic functions, the low-accuracy hidden dangers of traditional data acquisition and supervisory control can be avoided. In order to improve the fault tolerance and solution efficiency of power grid fault diagnosis model, a distribution network cyber physical system (CPS) fault diagnosis model based on advanced digital power system simulator (ADPSS) and IEC61850 is proposed. Firstly, the action rules and action status of CPS fault mode of distribution network from the whole correlation of fault element, protection action and circuit breaker trip, and the CPS grid topology of distribution network is constructed in ADPSS based on the topology and component characteristics of system. Secondly, according to the IEC61850 unified information model and modeling rules for the protection function of system equipment and operation function of circuit breaker, an information model with alarm, measurement, protection and fault recording logic is established. Then, the action status is obtained and used for the establishment of the distribution network fault diagnosis model by parsing the GOOSE message. Finally, the proposed modeling method and fault diagnosis strategy is validated through the test case.
Published Version
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