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32.发明公开터빈 발전기 시스템의 샤프트 비틀림 토크를 고려하여 선로의 고장 제거 시간을 최적화하는 방법 및 이를 이용한 선로 차단 장치 有权考虑涡轮发电机系统和断路器装置的轴扭矩的电力线路故障断路时间的优化方法
公开(公告)号：KR1020170010252A
公开(公告)日：2017-01-26
申请号：KR1020150101620
申请日：2015-07-17
Applicant: 성균관대학교산학협력단
Abstract: 본발명의실시예들에따른터빈발전기시스템을위한계통고장제거시간최적화방법은, 선로차단장치가터빈발전기시스템의고장제거허용구간또는고장제거차단구간중 하나와, 임계고장제거시간을획득하는단계, 선로고장이검출된경우에고장검출신호를획득하는단계및 고장검출신호가획득되면, 고장제거허용구간이나고장제거차단구간중 하나와임계고장제거시간에기초하여, 고장제거시점을결정하고, 결정된고장제거시점에따라고장제거신호를생성하는단계를포함할수 있다.
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公开(公告)号：KR101686322B1
公开(公告)日：2016-12-14
申请号：KR1020150031621
申请日：2015-03-06
Applicant: 성균관대학교산학협력단
CPC classification number: Y02E40/10
Abstract: 본발명의실시예들에따른분산된배터리전력저장장치들(BESS)을위한협조제어시스템은, 배전계통에설치된센서들로부터전압의크기, 주파수및 위상각, 부하의크기를포함하는측정데이터들을수신하고, 배터리전력저장장치그룹을구성하는 BESS들로부터각각의충전상태데이터를수신하며, 측정된측정데이터들에기초하여배전계통의외란발생여부를판정하고, 외란발생시에는배전계통에발생한외란이억제되도록충전제어신호또는방전제어신호를상기각 BESS 그룹의선순위 BESS에송신하는협조제어서버및 충전제어신호또는방전제어신호를각 BESS 그룹내에서주어진순위에따라차례로수신하면서, 2차배터리의충전상태에기초하여, 충전동작, 방전동작또는계통분리동작중 하나를수행하는적어도하나의배터리전력저장장치를포함할수 있다.
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公开(公告)号：KR101648308B1
公开(公告)日：2016-08-24
申请号：KR1020150078408
申请日：2015-06-03
Applicant: 성균관대학교산학협력단
IPC: G01R31/02 , G01R19/165
Abstract: 본발명의실시예에따른컴퓨터를이용한저압직류배전계통을위한고저항지락고장검출방법은, 컴퓨터가매 샘플링시간마다 (i) 저압직류배전계통의직류전류측정치를획득하는단계, (ii) 저압직류배전계통에서획득된직류전류측정치에대하여웨이블릿특이값분해기법(WSVD)을수행하여 SD(Sum of the absolute value of Detail) 값을도출하는단계, (iii) 직전리셋이후부터현재샘플링시간까지의 SD 값들의에너지인 SD 에너지값들을누적한누적 SD 에너지값을산출하는단계및 (iv) SD 에너지값들의누적이시작된이후경과된누적시간이소정의리셋시간에도달하기전에누적 SD 에너지값이문턱값을초과한때에, 고저항지락고장으로판정하는단계를포함할수 있다.
Abstract translation: 本发明的实施例涉及通过使用计算机来检测低压直流配电系统中的高阻抗接地故障的方法。 该方法包括以下步骤：（i）由计算机每采样时间获取直流测量值; （ii）通过对在低压直流配电系统中获取的直流测量值执行小波奇异值分解（WSVD）来得出细节绝对值（SD）值的和; （iii）计算其中SD值的SD能量值从先前复位时间累积到当前采样时间的累积SD能量值; 以及（iv）当所述SD能量值的积累达到某个复位时间之后的经过累积时间之前累积能量值超过阈值时，确定高阻抗接地故障。
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公开(公告)号：KR101645857B1
公开(公告)日：2016-08-16
申请号：KR1020150031617
申请日：2015-03-06
Applicant: 성균관대학교산학협력단
CPC classification number: H01F29/04 , H01H9/0005 , H01H9/548
Abstract: 본발명의실시예들에따른부하시 탭절환장치는 1차권선과 2차권선을포함하고 1차권선또는 2차권선중 하나에복수의탭들을구비하는변압기를위한부하시 탭절환장치로서, 배전계통의서로다른지점에서측정된복수의전압측정치들을입력받는전압측정치입력부및 입력된전압측정치들중 적어도하나의전압측정치에기초하여산출된하나의전압값에따라, 2차권선의저압전압이허용범위내에들어오도록만드는탭 번호를결정하는탭 번호결정부를포함할수 있다.
Abstract translation: 根据本发明的实施例的有载分接开关作为用于变压器的有载分接开关，其包括第一线和第二线，并且包括在第一线和第二线中的一个上的多个抽头， 可以包括电压测量值输入部，其接收在配电系统的不同点测量的多个电压测量值，以及抽头数确定部，其确定抽头数，以允许第二线的低电压处于 根据输入的电压测量值中基于至少一个电压测量值计算出的一个电压值来设置容差带。 因此，可以提供多点测量类型的有载分接变换方法，有载抽头变换器和使用其的变压器。
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Patent Agency Ranking
公开(公告)号：KR101352204B1
公开(公告)日：2014-01-16
申请号：KR1020120073264
申请日：2012-07-05
Applicant: 성균관대학교산학협력단
Abstract: A method for judging cause of power quality disturbances according to embodiments of the present invention may include: calculating S(τ, I0) through S-transform of a zero phase current IO obtained from single phase current of a three-phase power distribution line; acquiring harmonic components hk (2 =2) from a fundamental wave (h1) and a second harmonic (h2) and to an N^th harmonic (hN) on the basis of the S-transform result S(τ, I0) of the zero phase current IO; calculating average of harmonic value (AHV) from N harmonic components (hk) from the fundamental wave (h1) to the N^th harmonic (hN); and judging the cause of the disturbance as one of single-line-to-ground fault, operation of a transformer and unbalanced load or as one of capacitor switching or operation of a converter, according to the statistical characteristics of the AHV. [Reference numerals] (AA) START; (BB,EE,GG,II,KK) NO; (CC,DD,FF,HH,JJ) YES; (LL) END; (S11) Obtain zero phase current I_0 from phase current; (S12) Calculate S(τ,I_0) by S-transform of zero phase current I_0; (S13) Obtain harmonic components hk (2 =2) from fundamental wave (h1) and second harmonic (h2) to N^th harmonic (hN) on the basis of S-transform result S(τ, I0); (S14) Calculate average of harmonic value (AHV) from N harmonic components (h_k); (S15) Continuous sample difference >α?; (S16) AHV maximum value >β?; (S22) Operate transformer; (S24) Single-line-to-ground fault; (S25) unbalanced load; (S32) Operate converter; (S33) Capacitor switching
Abstract translation: 根据本发明的实施例的用于判断电能质量干扰的原因的方法可以包括：通过从三相配电线路的单相电流获得的零相电流IO的S变换来计算S（τ，I0） 基于S变换从基波（h1）和二次谐波（h2）到N次谐波（hN）获取谐波分量h k（2 <= k <= N，N> = 2） 零相电流IO的结果S（τ，I0）; 计算从N个谐波分量（hk）到基波（h1）到N ^次谐波（hN）的谐波值（AHV）的平均值; 根据AHV的统计特性，将干扰原因作为单线对地故障，变压器运行和不平衡负载或电容器切换或转换器的运行之一。 （附图标记）（AA）START; （BB，EE，GG，II，KK）NO; （CC，DD，FF，HH，JJ）是; （LL）END; （S11）从相电流获取零相电流I_0; （S12）通过零相电流I_0的S变换来计算S（τ，I_0） （S13）基于S变换结果S从基波（h1）和二次谐波（h2）到N ^次谐波（hN）获得谐波分量h k（2 <= k <= N，N> = 2） （τ，I0）; （S14）从N个谐波分量（h_k）计算谐波值（AHV）的平均值; （S15）连续采样差>α？ （S16）AHV最大值>β？ （S22）操作变压器; （S24）单线对地故障; （S25）不平衡负载; （S32）操作转换器; （S33）电容开关
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公开(公告)号：KR101331274B1
公开(公告)日：2013-11-20
申请号：KR1020120062514
申请日：2012-06-12
Applicant: 성균관대학교산학협력단
IPC: G01R31/08
Abstract: The present invention relates to a fault detection method of a distribution system and a fault detection device, which automatically detect failure through singular value decomposition and wavelet transformation of a phase voltage in a relay and determine the kind of the failure. The fault detection method of a distribution system according to an embodiment of the present invention comprises a step of obtaining phase-voltage data of a distribution system; a step of performing wavelet transformation for the phase-voltage data; a step of calculating a first fault detection index (SD) using a wavelet detail coefficient value to a value as a result of the wavelet transformation; a step of calculating a second fault detection index (SA) using a wavelet approximation coefficient value to the value as a result of the wavelet transformation; and a step of detecting the failure of the distribution system using the first fault detection index and the second fault detection index. [Reference numerals] (S10) Step of obtaining phase-voltage data of a distribution system;(S20) Step of performing wavelet transformation for the phase-voltage;(S30) Step of calculating a first fault detection index (SD) using a wavelet detail to a value as a result of the wavelet transformation;(S40) Step of calculating a second fault detection index (SA) using a wavelet approximation to the value as a result of the wavelet transformation;(S50) Step of detecting the failure of the distribution system using the first fault detection index and the second fault detection index;(S60) Step for detecting the kind of failure of the distribution system by using NSD, NSA, NSS, image voltage, and AR (SA Rank), which determines the ranking of NSA1 in an ascending order, with a differential value calculated by the first fault detection index and the second fault detection index
Abstract translation: 本发明涉及分配系统故障检测方法和故障检测装置，其通过奇异值分解和继电器中的相电压的小波变换来自动检测故障并确定故障的种类。 根据本发明实施例的分配系统的故障检测方法包括获得分配系统的相电压数据的步骤; 对相电压数据执行小波变换的步骤; 使用小波细节系数值作为小波变换的结果的值来计算第一故障检测索引（SD）的步骤; 使用小波近似系数值计算作为小波变换的结果的值的第二故障检测索引（SA）的步骤; 以及使用所述第一故障检测指标和所述第二故障检测指标来检测所述分配系统的故障的步骤。 （S10）获取配电系统的相电压数据的步骤（S20）对相电压进行小波变换的步骤;（S30）使用小波计算第一故障检测指标（SD）的步骤 细节作为小波变换的结果的值;（S40）使用对小波变换的结果的小波近似计算第二故障检测指数（SA）的步骤;（S50）检测故障的步骤 所述分配系统使用所述第一故障检测指标和所述第二故障检测指标;（S60）通过使用NSD，NSA，NSS，图像电压和AR（SA等级）来检测所述分配系统的故障类型的步骤，其确定 NSA1的排序按升序排列，具有由第一故障检测指标和第二故障检测指标计算出的差分值
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公开(公告)号：KR101129634B1
公开(公告)日：2012-03-28
申请号：KR1020110002137
申请日：2011-01-10
Applicant: 성균관대학교산학협력단
CPC classification number: H02H3/066 , H02H1/0015
Abstract: PURPOSE: A reclosing control apparatus which uses a harmonic ratio and a method thereof are provided to minimize unnecessary no-voltage time by effectively detecting a final arc time point, thereby improving reliability of a power supply process. CONSTITUTION: A voltage detection part(110) extracts a harmonic component included in a fault phase voltage waveform using a STFT(Short Time Fourier Transform). An HR(Harmonic Ratio) calculation part(120) calculates a harmonic ratio value of an odd harmonic wave and an even harmonic wave based on the extracted harmonic component. A filtering part(130) arranges a window with a predetermined size in a waveform which has the harmonic ratio value calculated by the HR calculation part. A reclosing controller(140) determines a final arc state. The reclosing controller controls a reclosing process according to a determination result.
Abstract translation: 目的：提供一种使用谐波比的重合闸控制装置及其方法，通过有效地检测最终的电弧时间点来最小化不必要的无电压时间，从而提高供电过程的可靠性。 构成：电压检测部（110）使用STFT（短时傅立叶变换）提取包含在故障相电压波形中的谐波成分。 HR（谐波比）计算部（120）基于提取的谐波分量来计算奇次谐波和偶次谐波的谐波比值。 滤波部件（130）以具有由HR计算部分计算的谐波比值的波形布置具有预定尺寸的窗口。 重新闭合控制器（140）确定最终的电弧状态。 重合闸控制器根据确定结果控制重合闸过程。
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公开(公告)号：KR101073205B1
公开(公告)日：2011-10-12
申请号：KR1020090110802
申请日：2009-11-17
Applicant: 성균관대학교산학협력단
IPC: H02H7/22
Abstract: 본발명은비대칭고장전류제거가가능한재폐로차단장치가개시된다. 일실시예에서, 재폐로차단기에있어서, 고장이발생하면, 재폐로차단기의 1차개로동작까지의전류를이용하여임피던스위상각을검출한후 그검출된임피던스위상각을이용하여비대칭고장전류가발생하지않는시점을구한후 그시점에서재폐로시킴으로써비대칭고장전류를감소시키는고장전류조절기를포함하는것으로, 재폐로차단기의무전압시간이후재폐로시비대칭고장전류가발생하지않는시점에서재폐로를제공함으로써시스템을안정적으로유지할수 있는것입니다.
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公开(公告)号：KR1020110054229A
公开(公告)日：2011-05-25
申请号：KR1020090110802
申请日：2009-11-17
Applicant: 성균관대학교산학협력단
IPC: H02H7/22
Abstract: PURPOSE: A reclosing blocking device for eliminating asymmetrical fault currents and control method thereof are provided to supply a reclosing path at time when asymmetrical fault currents are not generated. CONSTITUTION: A fault current controller is composed of a DFT(Discrete Fourier Transform)(110), a reclosing time detecting unit(120), and a reclosing controller(130). The DFT extracts a basic wave for a fault current in case of a circuit trouble. The reclosing time detecting unit obtains the phase angle of a changed impedance after a malfunction through the time difference between the 0 cross points of a current and a voltage of a basic wave. The reclosing controller performs reclosing at time when the voltage phase of a reclosing circuit breaker is the same as the phase angle of impedance.
Abstract translation: 目的：提供一种用于消除非对称故障电流的重合闸阻断装置及其控制方法，用于在不产生不对称故障电流时提供重合闸路。 构成：故障电流控制器由DFT（离散傅里叶变换）（110），重合闸时间检测单元（120）和重合闸控制器（130）组成。 在电路故障的情况下，DFT提取故障电流的基本波。 重新闭合时间检测单元通过电流的0个交叉点与基本波的电压之间的时间差来获得故障后的改变的阻抗的相位角。 重合闸控制器在重合闸断路器的电压相位与阻抗相位角相同时执行重合闸。
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