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This paper proposes a generation dispatch model based on the maximum entropy principle. The objective is to find an optimal generation dispatch strategy that minimizes the generation cost and satisfies the security constraints of power systems, while taking into account the uncertainty of wind power. Since in many situations, only partial information of the probabilistic variables can be obtained,...
When fault occurs in power system, the duration of voltage sag is determined by the fault clearing time of the protection system. In order to describe the duration of voltage sag more accurately, the time characteristic of protection system is considered for stochastic assessment of voltage sag. Based on the traditional assessment model, the mapping relationship between the time characteristic of...
A microprocessor-based relay protection unit has strong self-test capability that allows the device to monitor operation conditions and diagnose problems by itself. Based on the characteristics of microprocessor-based protection software and hardware architecture, this paper proposed an online health monitoring methodology using the self-test information of protection units. In accordance with expression...
The Electronic Current Transformer based on Rogowski coils (ECT) has many advantages, such as simple insulation structure, immunity to electromagnetic interference, no saturation effect, no flammable materials such as oil, and lightweight, etc. As a result, ECT has been considered as the appropriate substitute of the traditional electromagnetic current transformer. But the ECT is new equipment in...
The construction of 1000 kV EHV AC\DC net challenges the reliability of relay protection unprecedentedly. One of these new issues is how to record the true value measured and sent by intelligent relay protection system. The introduction of switch in net-sample-net-trip substation causes uncertain transfer delay and arrival interval deviation, which makes the recorded data unreliable. While the mirrored...
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