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박용업(Yong-Up Park),강문호(Moon-Ho Kang),조남훈(Nam-Hoon Jo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The equipment using the power electronic device is recently increased in the distribution system, so power utility and customers increase in concerning about harmonics level. Accordingly, The power utility which prepares a measure for the harmonic public standard and manege process must analysis of the harmonics level and the effect on equipment interconnecting distribution system. In the past, the measurement equipment and technique is imperfect, so very difficult to investigate the harmonics and trend. But the improvement of the measurement equipment recently is possible to obtain the data realtime for harmonic analysis. In this paper, we research the measuring domestic harmonic and constructing of DB based on the IEC standard.
박용업(Yong-Up Park),강문호(Moon-Ho Kang),이건행(Keon-Hang Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
The main contents of this paper are distribution power system harmonic voltage measurement and analysis. The PQM system has recently constructed by KEPCO in order to investigate power quality of distribution power system for new power quality standard of KEPCO. In result,we have confirmed that voltage harmonic measurement value of this paper is suitable in most point and voltage harmonic of distribution line end side is not always high.
박용업(Yong-Up Park),이건행(Keon-Hang Lee) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.9
The main contents of this paper are the PQM system construction case and distribution system harmonic voltage analysis. The PQM system has constructed by KEPCO in order to investigate power quality of distribution power system for new power quality standard of KEPCO. In result, we have confirmed that voltage harmonic measurement value of the high voltage contract customer 8 households is suitable the KEPCO harmonic standard tentative plan. And the voltage harmonic value of distribution line end side is not always more high than source side by harmonic current offset effect. In the future, acquired data by season, region, load from the PQMS will be used on the resonable harmonic standard enactment in KEPCO.
대용량 전동기 기동시 배전계통의 순간전압강하 발생사례 분석
박용업(Yong-Up Park),이건행(Keon-Hang Lee) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.10
Recently, the KEPCO is constructing the PQMS(Power Quality Monitoring System) each of the distribution line and will establish the voltage sag standard based on the long time measurement data of PQMS. The voltage sag prospect is difficult for the power system manager, however, the voltage sag forecasted is very important because the damage effect of the voltage sag is very broad. This paper describes the prospect formula of the voltage sag magnitude in the PCC(Point Common Coupling) by the starting current when the high capacity equipment is connected with the distribution line. To achieve this, this paper has proposed the sag prospect formula revision of KEPCO for the reliability improvement and the proposed formula has been applied the voltage sag real case to inspect the calculation procedure and reliability.
박용업(Yong-Up Park),최성훈(Seung-Hoon Choi),장준수(Joon-Soo Chang) 대한전기학회 2010 전기학회논문지 Vol.59 No.1
In order to operate the power system satisfactory for both system operators and customers, it is important to limit the harmonic currents to the allowable levels which injected into the system from the distorting installations. In this regard, the principles for the allocation of emission limits on individual customer were introduced in the technical report of IEC61000-3-6. According to these general principles, the emission limits are dependent on the agreed power of the customer, the power of the harmonic-generating equipment, and the system characteristics. The considerations in this report are very comprehensive and the process introduced is practical enough to implement as it is. However, there is a fact not appropriately dealing in the report that could be a very tickle but has a huge impact on determining the emission limit. This is the effect of non-harmonic load currents. More precisely, these are from the equipments which do not emit any harmonic or may emit harmonics but this specific order under the consideration by themselves if the source power is sinusoidal. The load currents originated from these equipments have an effect of active filter against the specific order of harmonic therefore, these should be dealt as a significant factoron the process of determining the emission limits for individual customer.
전력회사 관점의 배전계통 경제형 PQM 시스템 구축방안
박용업(Yong-Up Park),이건행(Keon-Hang Lee) 대한전기학회 2010 전기학회논문지 Vol.59 No.9
This paper describes the distribution power system econimical PQMS(Power quality monitoring system) of Utility. Recently, the korea power quality standard has been established based on the IEC Std. By IEC Std., the power quality assessment point is measured in PCC(Point of common coupling). In this case, the utility has to construct PQM system in all customer PCC point and the PQ meter cost would be very high in order to acquire the suitable data. Also the distribution system would be encounter the communication overload problem due to the huge data. Accordingly the utilities could not apply to PQM system in the distribution power system by the cost and communication problem. In this paper, the proposed economical PQMS has the voltage and current signal reiteration function and FFT operation function is transferred the server. Also the voltage and current measurement channels are minimized by a classified substation construction.
박용업(Yong-Up Park),강문호(Moon-Ho Kang),윤기갑(Gi-Gap Yoon) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The dispersed generation is recently increased introduction for the energy supply rationalization and effective management of power system. But the dispersed generation causes to the various trouble that isn't occurred in the past, for example, the two way systems have an effect on the mistake action of protection equipment and the power quality. In this paper, we research the influence on the harmonic when the dispersed generation is interconnected with distribution system. To achievement, we construct the interconnecting dispersed generation and distribution system which is applied to the permission of harmonic emission. After that, we simulate about the harmonic of distribution system interconnection dispersed generation by the PSCAD/EMTDC analyzing transient state of the power system.