• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.59 no.2
• /
• pp.173-178
• /
• 2010

Frequency is an important operating parameter of a power system. Due to the sudden change in generation and loads or faults in power system, the frequency is supposed to deviate from its nominal value. It is essential that the frequency of a power system be maintained very close to its nominal frequency. And monitoring and an accurate estimation of the power frequency by timing synchronized signal provided by FDR is essential to optimum operation and prevention for wide area blackout. As most conventional frequency estimation schemes are based on DFT filter, it has been pointed out that the gain error by change in magnitude could cause the defects when the power frequency is deviated from nominal value. In this paper, an advanced frequency estimation scheme using gain compensation for fault disturbance recorders (FDR) is presented. The proposed scheme can reduce the gain error caused when the power frequency is deviated from nominal value. Various simulation using both the data from EMTP package and user's defined arbitrary signals are performed to demonstrate the effectiveness of the proposed scheme. The simulation results show that the proposed scheme can provide better accuracy and higher robustness to harmonics and noise under both steady state tests and dynamic conditions.

• Journal of the Korean Institute of Telematics and Electronics D
• /
• v.34D no.1
• /
• pp.30-34
• /
• 1997

An improved clock-feedthrough compensation scheme for switche dcurrent system is proposed. Both the signal dependent and the constant clock-feedthrough terms are cancelled by using both NMOS and PMOS current samplers and by adopting a source replication technique. The proposed current memory cell was fabricated with 0.6$\mu$m CMOS process. Both experimental and theoretical results on clock-feedthrough error reveal substantial reduction over the existing compensation schemes.

• Journal of Institute of Control, Robotics and Systems
• /
• v.4 no.5
• /
• pp.636-643
• /
• 1998

This paper is presents multivariable control scheme for industrial robot manipulators. The control scheme consists of two loops. The modeling error between linearized robot model and actual robot model is compensated in error compensation loop. The PID control loop is designed for pole assignment to stability of robot system and utilized for trajectory tracking. Alternatively computer simulation results are given for illustration purpose of suggested controller.

• Proceedings of the KIEE Conference
• /
• 1995.11a
• /
• pp.178-181
• /
• 1995

In this paper, on-line adaptive friction compensation scheme for the precise position control is presented. 2 DOF system with compliance and friction is used for the plant model. In order to reduce the calculation time for the parameter estimation, 1 DOF estimation model is used. The computer simulation and experimental results show the validity of the supposed scheme.

• Proceedings of the KIPE Conference
• /
• 1998.10a
• /
• pp.888-893
• /
• 1998

In practice, not only the load current but also the load voltage may contain asymmetric and harmonic components. Instantaneous power using p-q theory is analyzed to have compensation of reactive power, harmonics and asymmetry at the same time. In this paper, the limitation of p-q theory by using only shunt or series active filter is analyzed. A new scheme is proposed to solve the above issues.

• Proceedings of the KIEE Conference
• /
• 2001.04a
• /
• pp.218-221
• /
• 2001

This paper presents a new control scheme for a Dynamic Voltage Restorer(DVR) system consisting of series voltage source PWM converters. The control system is designed using differential controllers and digital filters to transfer the faulted ac source voltage to a d-q model and to separate the positive and negative sequence component for individual compensation. The performance of the presented controller and scheme are confirmed through simulation and actual experiment.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.649-651
• /
• 2003

In the framework of competitive electricity market, the Market Power due to the transmission congestion, lack of demand-side response, various uncertain factors etc. have been significant problem. This paper reviews the market rules of Korea power system and the uplift scheme for constrained on/off generators. Then, this paper points out several problems and the mitigation measures of local market power concerning the compensation for constrained-off generators.

• The Journal of Industrial Distribution & Business
• /
• v.14 no.7
• /
• pp.1-7
• /
• 2023

Purpose: The present research is to explore and investigate the meaningful difference between job-based pay and skill-based pay in the current literature to shed light on the advantages and caveats of two compensation approach, providing direction for human resource practitioners looking to develop efficient and fair compensation plans. Research design, data and methodology: The methodology based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) was used for this research. The PRISMA technique is generally considered the gold standard since it guarantees openness, repeatability, and rigor. Studies comparing salaries based on work duties versus those based on individual skills published in English and accepted for publication in peer-reviewed journals are eligible for inclusion. Results: According to the comprehensive literature analysis, the present research provides clear comparison between Job-based pay and skilled-based pay, pointing out a similarity and four differences (1. Criteria for pay determination, 2. Flexibility, 2. Job Scope, and 4. Career progression. Conclusions: The result of the current research implies that human resource professionals would be well to learn the effects of various compensation structures on career advancement, and suggests for them that employees can take advantage of chances to advance in their careers based on right compensation schemes.

• Proceedings of the KIPE Conference
• /
• 2004.07b
• /
• pp.533-536
• /
• 2004

In this paper, a novel compensation scheme for ac-dc pwm converters under switching device fault status has been proposed, along with an effective diagnosis method. With the proposed scheme, the pwm converter can be properly operated even when one of the switching devices of the converter is out of control, so that it may ensure the performance and reliability of pwm converters to be increased. The developed scheme is explained in theoretically and the validity is verified by the informative simulation and experimental results in detail.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.11
• /
• pp.5594-5600
• /
• 2013

The compensation for employee invention from the university can be taxed or non-taxed depending on the classification of the type of income. The government legislated the Promotion of Industrial Education and Industry-Academic Cooperation Act and the Technology Transfer and Commercialization Promotion Act in order to improve the research productivity of universities and industrial-academic collaboration via transferring the technologies. However, the confusion with taxation on the compensation of employee invention from the university has been incurred due to the difference of legal interpretation between government bureaus. In this research, bureaucratic conflict on the non-taxation scheme is examined in a legal aspect and the effect of non-taxation scheme is also studied in aspect to personal tax exemption. Finally, some suggestions are provided for the purpose of settlement of the non-taxation scheme in order to improve employee invention from the university.