Acceleration method for zero sequence inverse time limit overcurrent protection of adjacent lines in one-tower two-circuit lines
The invention discloses an acceleration method for zero sequence inverse time limit overcurrent protection of adjacent lines in one-tower two-circuit lines. The method includes calculating a critical failure position of false action of adjacent line protection according to an obtained zero sequence...
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| creator | YIN FENGZHAO SHENG YARU XIAO JING ZHANG ZIJIN KANG QIBAO CONG WEI WANG ANNING ZHANG LIQIANG SUN MENGCHEN HU LIANGLIANG |
| description | The invention discloses an acceleration method for zero sequence inverse time limit overcurrent protection of adjacent lines in one-tower two-circuit lines. The method includes calculating a critical failure position of false action of adjacent line protection according to an obtained zero sequence impedance value; calculating zero sequence inverse time limit protection zero sequence current flowing through the two ends of a failure line when a failure occurs at the critical failure position and calculating the action time of failure line two end protection; calculating the action time of protection of adjacent lines on two sides of the two-circuit lines by adding a time delay to the action time of failure line two end protection; solving a time setting coefficient of protection of adjacent lines on two sides of the two-circuit lines after a setting process. The invention also discloses a zero sequence current change based acceleration scheme for zero sequence inverse time limit overcurrent protection of the |
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The method includes calculating a critical failure position of false action of adjacent line protection according to an obtained zero sequence impedance value; calculating zero sequence inverse time limit protection zero sequence current flowing through the two ends of a failure line when a failure occurs at the critical failure position and calculating the action time of failure line two end protection; calculating the action time of protection of adjacent lines on two sides of the two-circuit lines by adding a time delay to the action time of failure line two end protection; solving a time setting coefficient of protection of adjacent lines on two sides of the two-circuit lines after a setting process. 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| subjects | CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION |
| title | Acceleration method for zero sequence inverse time limit overcurrent protection of adjacent lines in one-tower two-circuit lines |
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