Ground fault troubleshooting and non-power-cut core alignment detection method for secondary direct current system of transformer substation
The invention provides a transformer substation secondary direct current system ground fault troubleshooting and non-power-cut core alignment detection method. The method comprises the steps that equivalent capacitance of a to-be-detected cable is obtained; constructing an oscillation detection loop...
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| creator | OUYANG LIANG LIU WENJUN HUANG ZUOCAI LIAO XIANZE LIU CHANGJIANG TU ZHIBIN ZENG SONG XIE XIAOCHENG XIE XIAOFAN XIAO RENJIE GAO CHUAN YU LONGFEI FU YUN GUO WENXIN ZHENG SHANHAI HUANG ZHIPENG ZHANG LI YI XUESONG |
| description | The invention provides a transformer substation secondary direct current system ground fault troubleshooting and non-power-cut core alignment detection method. The method comprises the steps that equivalent capacitance of a to-be-detected cable is obtained; constructing an oscillation detection loop, and taking the equivalent capacitor as a constituent part of the oscillation detection loop; acquiring a detected oscillation frequency; and judging core alignment information or ground fault information according to the change of the oscillation frequency. Core detection and ground fault detection of the direct-current cable are realized by means of the equivalent capacitance parameter of the cable, the equivalent capacitance is obviously changed when the direct-current cable is grounded or core detection is abnormal, and the grounding state or core detection condition of the direct-current cable can be represented by monitoring the equivalent capacitance parameter of the cable. The change of the equivalent capa |
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The method comprises the steps that equivalent capacitance of a to-be-detected cable is obtained; constructing an oscillation detection loop, and taking the equivalent capacitor as a constituent part of the oscillation detection loop; acquiring a detected oscillation frequency; and judging core alignment information or ground fault information according to the change of the oscillation frequency. Core detection and ground fault detection of the direct-current cable are realized by means of the equivalent capacitance parameter of the cable, the equivalent capacitance is obviously changed when the direct-current cable is grounded or core detection is abnormal, and the grounding state or core detection condition of the direct-current cable can be represented by monitoring the equivalent capacitance parameter of the cable. 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The method comprises the steps that equivalent capacitance of a to-be-detected cable is obtained; constructing an oscillation detection loop, and taking the equivalent capacitor as a constituent part of the oscillation detection loop; acquiring a detected oscillation frequency; and judging core alignment information or ground fault information according to the change of the oscillation frequency. Core detection and ground fault detection of the direct-current cable are realized by means of the equivalent capacitance parameter of the cable, the equivalent capacitance is obviously changed when the direct-current cable is grounded or core detection is abnormal, and the grounding state or core detection condition of the direct-current cable can be represented by monitoring the equivalent capacitance parameter of the cable. 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The method comprises the steps that equivalent capacitance of a to-be-detected cable is obtained; constructing an oscillation detection loop, and taking the equivalent capacitor as a constituent part of the oscillation detection loop; acquiring a detected oscillation frequency; and judging core alignment information or ground fault information according to the change of the oscillation frequency. Core detection and ground fault detection of the direct-current cable are realized by means of the equivalent capacitance parameter of the cable, the equivalent capacitance is obviously changed when the direct-current cable is grounded or core detection is abnormal, and the grounding state or core detection condition of the direct-current cable can be represented by monitoring the equivalent capacitance parameter of the cable. The change of the equivalent capa</abstract><oa>free_for_read</oa></addata></record> |
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| title | Ground fault troubleshooting and non-power-cut core alignment detection method for secondary direct current system of transformer substation |
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