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In this paper, the PMU performances evaluation, especially the dynamic one, are presented, which is significant for improving PMU behavior in smart grid. The comprehensive test program including steady state test and dynamic test is outlined. And the details of the test items are revealed. On the basis of this, the performances of PMUs from three main vendors in China are tested and evaluated. The...
A novel phase selector is proposed based on the multi-parameter comparison of fault components. Each of three phases is used as the reference phase in turn to calculate the positive sequence component and the sum of the zero and negative sequence components. The phase difference between the positive sequence component and the sum of the zero and negative sequence components is calculated under three...
The instrument transformer is the necessary equipment which connects the primary power system and PMU. Therefore, the measurement accuracy of PMU is directly affected by the transfer accuracy and the transient response of instrument transformer. In this paper, the dynamic signal models are abstracted from the phenomena of practical power systems. Under such kinds of dynamic signal models, the impact...
The comparison between periodic function space based power theory and three other power theories including traditional power theory , instantaneous power theory put forward by Akagi and Fryze power theory are analyzed in this paper. The consistency and difference are indicated in several different aspects: physical meaning, mathematical concept and the derivation of expressions. Analyses shows that...
In this paper, a new method of hybrid non-linear state estimation with PMU is proposed. Firstly, the voltage phasor measurements are transformed into indirect equivalent branch current measurements, with which the conventional state estimator takes the impact of PMU into consideration. Secondly, the indirect measurement errors caused by the measurement transforming are analyzed and calculated in detail...
Synchronized phasor measurement technology has been gaining increasingly interests in China due to its wide area time synchronization capability and fast transmission speed. Over 10 years of implementation of wide area measurement system (WAMS) in Chinese power grid have shown its great value in power system dynamic monitoring and potential applications in system modeling and validation, feedback...
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