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With the development of the Wide-Area Measurement System (WAMS), researchers has proposed different kinds of Wide-Area Damping Controller (WADC) to suppress inter-area power oscillations. However time delays in WAMS communication networks have made it less effective to improve dynamic stability of large-scale power system. Traditional methods such as modal analysis and simulation cannot study the...
To suppress both the low-frequency oscillation and subsynchronous oscillation, the coordinated optimization strategy of the multi-channel PSS and TCSC Damping Controller is researched in this paper. Considering the oscillation modes to be suppressed as the objective modes, and the maximization of the damping ratio of the objective modes as the optimization objects, an optimization model is established...
With the advent of smart-grid technology, the wide application of FACTS (Flexible AC Transmission Systems)- based damping controllers exerts influences on both small signal stability and transient stability. Traditional Modal Analysis (MA) method can hardly meet the requirements of online applications. According to the inter-area oscillation mode to be studied, the multi-machine system can be equivalent...
To assist dispatchers to on-line monitor small signal stability of power grid, this paper proposed an artificial intelligent method-Case-Based Reasoning(CBR) theory to predict small signal stability based on measurement data of wide area measurement system (WAMS). Oscillatory active power increment distribution (OAPID) was introduced to improve the prediction accuracy. The designing process of small...
This paper proposes a power system small signal (dynamic) stability early warning approach based on Case-Based Reasoning (CBR) theory, which is an artificial intelligent method. According to measurement data of Wide Area Measurement System (WAMS), this approach is able to achieve following functions: In normal operation status, it can estimate small signal stability of power grid via CBR in historical...
In this paper, a silicon bulk micromachined lateral-axis tuning-fork gyroscope (TFG) with a decoupled comb drive and torsional sensing comb capacitors is presented. The novel driving comb capacitors are used to suppress the parasitic out-of-plane electrostatic force and, hence, can decouple the mechanical crosstalk from the sensing mode to the driving mode in a simple manner. The torsional sensing...
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