KR102771212B1 - 전력설비의 동작 감시 장치 및 그 방법 - Google Patents
전력설비의 동작 감시 장치 및 그 방법 Download PDFInfo
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- KR102771212B1 KR102771212B1 KR1020190081205A KR20190081205A KR102771212B1 KR 102771212 B1 KR102771212 B1 KR 102771212B1 KR 1020190081205 A KR1020190081205 A KR 1020190081205A KR 20190081205 A KR20190081205 A KR 20190081205A KR 102771212 B1 KR102771212 B1 KR 102771212B1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
- H03L2207/50—All digital phase-locked loop
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
도 2는 본 발명의 일 실시예에 따른 전력설비의 동작 감시 방법을 설명하기 위한 흐름도이다.
30 : 경고부 40 : 출력부
50 : 디지털 제어설비 60 : 디지털 위상 검출부
70 : 디지털 위상 입력부
Claims (9)
- AC 전력계통으로부터 3상 전압의 위상을 아날로그 회로로 검출하는 아날로그 위상 검출부;
상기 AC 전력계통에 연계된 디지털 제어설비로부터 디지털 회로를 통해 검출된 위상을 입력받는 디지털 위상 입력부; 및
상기 아날로그 위상 검출부로부터 검출된 아날로그 위상과 상기 디지털 위상 입력부로부터 입력된 디지털 위상을 비교하여 위상의 일치여부를 기반으로 상기 디지털 제어설비의 동작 상태를 판단하는 제어부;를 포함하되,
상기 제어부에서 상기 디지털 제어설비의 동작 상태를 판단하여 상기 아날로그 위상과 상기 디지털 위상간 위상차가 설정오차 이상 발생하여 사이버 공격이 발생한 것으로 판단된 경우, 상기 디지털 제어설비의 작동을 정지시키기 위한 트립신호를 출력하는 출력부;를 더 포함하고,
상기 아날로그 위상 검출부는, 아날로그 PLL을 이용하여 위상을 검출하고,
상기 아날로그 PLL은, DSOGI(Double Second Order Generalized Integrator) PLL을 포함하며,
상기 디지털 제어설비는, 디지털 PLL을 이용하여 위상을 검출하는 디지털 위상 검출부;를 포함하는 것을 특징으로 하는 전력설비의 동작 감시 장치.
- 삭제
- 삭제
- 삭제
- 제 1항에 있어서, 상기 제어부에서 판단한 동작 상태에 따라 알람을 발생시키는 경고부;를 더 포함하는 것을 특징으로 하는 전력설비의 동작 감시 장치.
- 삭제
- 제어부가 아날로그 위상 검출부로부터 검출한 아날로그 위상을 입력받는 단계;
상기 제어부가 디지털 위상 입력부를 통해 디지털 제어설비에서 검출한 디지털 위상을 입력받는 단계; 및
상기 제어부가 상기 아날로그 위상과 상기 디지털 위상의 일치여부를 판단하여 상기 디지털 제어설비의 동작 상태를 판단하는 단계;를 포함하되,
상기 제어부가 상기 디지털 제어설비의 동작 상태를 판단하여 상기 아날로그 위상과 상기 디지털 위상간 위상차가 설정오차 이상 발생한 경우, 상기 디지털 제어설비를 정지시키기 위한 트립신호를 출력하는 단계;를 더 포함하고,
상기 디지털 제어설비의 동작 상태를 판단하여 위상차가 발생한 경우 알람을 발생시키는 단계;를 더 포함하며,
상기 아날로그 위상을 입력받는 단계는, DSOGI(Double Second Order Generalized Integrator) PLL을 포함하는 아날로그 PLL을 이용하여 검출한 아날로그 위상을 입력받고,
상기 디지털 위상을 입력받는 단계는, 디지털 PLL을 이용하여 검출한 위상을 입력받는 것을 특징으로 하는 전력설비의 동작 감시 방법. - 삭제
- 삭제
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