Spare power automatic switching system with self-adaptive switching intermediate resistance grounding mode, and operation method thereof

• Main Authors: ZHANG YUE, DENG XING, CHEN HENGXIANG, TAO JUN, LIU HUPING
• Format: Patent
• Language: English
• Published: 04.02.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a spare power automatic switching system with a self-adaptive switching intermediate resistance grounding mode, and an operation method thereof. The spare power automatic switching system comprises a spare power automatic switching device which is applied to a 10 KV transformer substation system with the intermediate resistance grounding mode, wherein the 10 KV transformer substation system adopts an external bridge expansion wiring mode, a 110 KV side is provided with three bus bars connected through buscouple switches, and the 10 KV side is provided with four sections of bus bars with three grounding transformers respectively. The spare power automatic switching device comprises an analog input end, trip position contacts and input amount contacts of bus bar intermediate resistance switching-in pressing plates, wherein the analog input end is connected into voltage and currents of the four sections of bus bars on the 10 KV side; the trip position contacts are connected into all branch loop switches, buscouple switches and all intermediate resistance switches connected with all the buses on the 10 KV side. The 10 KV transformer substation system comprises contact on-off input ends of all locking spare power automatic switching switching-in amount aiming at spare protection of all main transformers and manual tripping acts of all switches. The spare power automatic switching system can achieve mutual switching of main power supplies and spare power supplies as well of self-adaptive switching of intermediate resistance grounding points by optimizing the structure and the operation logic of the spare power automatic switching system.