• Korean journal of communication and information
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• v.31
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• pp.261-293
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• 2005

This article aims at investigating the origin of 'gookmin', which is currently working as the dominant discourse and leading identity in the South Korean society. Like 'nation', 'people' or/and 'citizen', the term of 'gookmin' is a very much particular and historical outcome of the colonial modernity. Nevertheless, however, there have been not so much serious socio-linguistic, cultural-political studies about its root. It is theoretically as well as practically quite important to trace back the birth of 'gookmin', which is working as an ideological, epistemological frame in/between subject and reality. In this regard, this article will consider the late Japanese colonial period as a key period of the birth of 'gookmin'. It will then critically scrutinize how the total mobilization system by adopted the colonial government has formed the discourse and subjectivity of 'gookmin' based on various physical apparatuses. By revealing that a totalistic nation/state of Japanese colonialism is behind 'gookmin', which wanted to mobilize every individuals into a so-called article of empire, this article tries to show the fascist and propaganda nature of 'gookmin' continuing even after the liberation. As a historical-materialist work of deconstruction the dominant discourse of 'gookmin', this study will basically take a cultural studies approach.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.173-174
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• 2016

This paper proposes a comparison of Voltage Oriented Control (VOC) and Direct Power Control (DPC) under command mode transition for PMSG Wind Turbines (WT). Based on a neutral point clamped three level back to back type Voltage Source Converter (VSC), proposed control scheme automatically control the generated output power to satisfy a grid requirement from the hierarchical wind farm controller. Automatic command mode transition based on the dc-link voltage error provides a command mode changing between grid command and MPPT mode. It is confirmed through PLECS simulations in Matlab. Simulation result shows that proposed control scheme of VOC and DPC achieves a much shorter transient time of generated output power than the conventional control scheme of MPPT with optimal torque control and VOC under a step response. The proposed control scheme makes it possible to provide a good dynamic performance for PMSG wind turbines in order to generate a high quality output power.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.367-368
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• 2014

This paper investigates characteristics of high power semiconductor device losses in 5MW-class Permanent Magnet Synchronous Generator (PMSG) Medium Voltage (MV) wind turbines. High power semiconductor device of press-pack type IGCT of 6.5kV is considered in this paper. Analysis is performed based on neutral point clamped (NPC) 3-level back-to-back type voltage source converter (VSC) supplied from grid voltage of 4160V. This paper describes total loss distribution at worst case under inverter and rectifier operating mode for the power semiconductor switches. The loss analysis is confirmed through PLECS simulations. In addition, the loss factors due to di/dt snubber and ac input filter are presented. The investigation result shows that IGCT type semiconductor devices generate the total efficiency of 97.74% under the rated condition.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.361-362
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• 2015

This paper proposes a Direct Power Control (DPC) scheme of improved command tracking capability for Permanent Magnet Synchronous Generator (PMSG) Medium Voltage (MV) Wind Turbines. Benchmarking is performed based on a neutral point clamped three-level back-to-back type voltage source converter. It is introduced to design the DPC modeling and propose DPC scheme of a three-level NPC (3L-NPC) converter. During the fault condition in wind farms, the proposed control scheme directly controls the generated output power to the command value from the hierarchical wind farm controller. The proposed control scheme is compared with conventional control scheme as respect to loss and thermal analysis. The DPC scheme of improved command tracking capability is confirmed through PLECS simulations. Simulation result shows that proposed control scheme achieves a much shorter transient time in a step response of generated output power. The proposed control scheme makes it possible to provide a good dynamic performance for PMSG MV wind turbine to generate a high quality output power under grid fault condition.

• The Transactions of the Korean Institute of Power Electronics
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• v.21 no.3
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• pp.238-248
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• 2016

In this study, an automatic command mode transition strategy of direct power control (DPC) is proposed for permanent magnet synchronous generators (PMSGs) medium-voltage (MV) offshore wind turbines (WTs). Benchmarking against the control methods are performed based on a three-level neutral-point-clamped (NPC) back-to-back type voltage source converter (VSC). The ramping rate criterion of complex power is utilized to select the switching vector in DPC for a three-level NPC converter. With a grid command and an MPPT mode transition strategy, the proposed control method automatically controls the generated output power to satisfy a grid requirement from the hierarchical wind farm controller. The automatic command mode transition strategy of DPC is confirmed through PLECS simulations based on Matlab. The simulation result of the automatic mode transition strategy shows that the proposed control method of VOC and DPC achieves a much shorter transient time of generated output power than the conventional control methods of MPPT and VOC under a step response. The proposed control method helps provide a good dynamic performance for PMSGs MV offshore WTs, thereby generating high quality output power.

• Korean journal of communication and information
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• v.77
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• pp.111-136
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• 2016

This paper focuses on the national "flagging" as a current affair, important phenomenon. National flags, it sees, take over varous places, control the surrounding space, and even dictate everybody's perspective by being visualized everywhere anytime. It investigates the issue of national flags and their hoisting poles as a sort of apparatuses that interpellate me as well as us into patriotic 'gookmin'. The placement, arrangement of national flag poles around the country continued throughout 2015 and particularly speeded up in October of the year is regarded as a key symbolic, symptomatic sign to read the transformation of political conjuncture. Preparing a radically conjuncturist cultural study about the changing reality, the researcher will see the flagging poles as a phenomenal result, outcoming of certain intent and plan for reconstructing the political actuality. More precisely, he will interpretate the tall omni-present poles of national flags as a dispositif of appearing the neoliberal/neoconservative capitalist state, as a apparatus of constituting and expressing the masses' psycho-ideological condition of today. The researcher, who perceives the national flag poles as a kind of ISAs. will first review the increased flagging phenomenon and related media discourses. Next, he will critically investigate the 'love our country' 'national flagging' movements organized by the above and operated from the bottom. Then, he will focus more on the very tall national flag poles built and seen around the country. Finally, he will conclude the study with a critical remark, touching briefly the case of controversy over setting a pole in the center of Seoul city square.