Development of Transient Stability Controller System (TSC) Based on On-Line Stability Calculation

Chubu Electric Power Co., Ltd.'s hybrid power system simulator consists of analog models and hybrid models. The power system facilities are downsized as an analog model, while the synchronous generators and the loads are modeled as an actual current source model through the amplifier and the digital model. In recent years, there is a growing interest in analyzing power system dynamic phenomena caused by a high penetration of distributed generations. Therefore, the multifunctional generator model that can simulate distributed generation has been developed. C⃝ 2016 Wiley Periodicals, Inc. Electr Eng Jpn, 198(3): 46-57, 2017; Published online in Wiley Online Library (wileyonlinelibrary.com).

Section: Introductionmentioning

confidence: 99%

Development of a Hybrid Simulator for Power System Analysis for a High Penetration of Distributed Generations

Kitagawa

Takagi

Yokoi

et al. 2016

“…These factors impose severe requirements on system stability and increase the risk of generator step-out or wide-area power outage [1]. This calls for constant monitoring and estimation of power system stability to prevent generator step-out and other problems.…”

Section: Introductionmentioning

confidence: 99%

“…Such an approach is advantageous in that the equipment parameters can be estimated online without unit decommissioning [2]. Particularly in recent years, various methods of online monitoring have been proposed [1,3,4]. These methods place emphasis on widearea control to flexibly handle variations of the system state.…”

Section: Introductionmentioning

confidence: 99%

Identification of characterization factor for power system oscillation based on multiple synchronized phasor measurements

Hashiguchi

Watanabe

Matsushita

et al. 2008

SUMMARYElectric power systems in Japan are composed of remote and distributed location of generators and loads mainly concentrated in large-demand areas. The structures having long-distance transmission tend to produce heavy power flow with increasing electric power demand. In addition, some independent power producers (IPP) and power producer and suppliers (PPS) are participating in the power generation business, which makes power system dynamics more complex. However, there was little observation as a whole power system. In this paper the authors present a global monitoring system of power system dynamics by using the synchronized phasor measurement of demand-side outlets. Phasor Measurement Units (PMU) are synchronized based on the global positioning system (GPS). The purpose of this paper is to show oscillation characteristics and methods for processing original data obtained from PMU after certain power system disturbances triggered by accidents. This analysis resulted in the observation of the lowest and the second lowest frequency mode. The derivation of eigenvalue with the two-degree-offreedom model brings a monitoring of two oscillation modes. Signal processing based on wavelet analysis and simulation studies to illustrate the obtained phenomena are presented in detail.

“…It is known that two coherent generator groups oscillate in reverse phase in the long-period mode [6]. These two generator groups are specified by the coherency of internal voltage phasors, and the step-out is predicted for an aggregated two-machine equivalent power system.…”

Section: Introductionmentioning

confidence: 99%

Midterm stability evaluation of wide‐area power system using synchronized phasor measurements

Ota

Ukai

Nakamura

et al. 2004

SUMMARYIn recent years, the PMU (Phasor Measurement Unit) has received a great deal of attention as a synchronized measurement system of power systems. Synchronized phasor angles obtained by the PMU provide valuable information for evaluating the stability of a bulk power system. The aspect of instability phenomena during midterm tends to be more complicated, and the stability analysis using the synchronized phasor measurements is effective in order to keep a complicated power system stable. This paper proposes a midterm stability evaluation method for the wide-area power system using synchronized phasor measurements. By clustering the power system to some coherent groups, step-out is predicted on the basis of an aggregated two-machine equivalent power system. The midterm stability of a longitudinal power system model of Japan's 60-Hz systems constructed by a hybrid-type power system simulator is practically evaluated using the proposed method.