A 110 kV substation high, medium and low three-side standby automatic switch-on action coordination method

• Main Authors: TIAN XINCHENG, MENG FANJIN, SUN GUOZHONG, CHEN XUEWEI, LI SHUN, SUN JING, GAN JINGFU, ZHANG WEI, YU PENG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2019
• 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 relates to a 110 kV substation high-medium-low three-side standby automatic switch-on action coordination method, belonging to the technical field of electric power standby automatic switch-on method. The technical scheme is that the locking condition is added into the automatic switching device on the middle and low voltage side, two signals of the high-voltage side bus voltage andthe three-winding main transformer differential protection action are introduced into the medium-low voltage side-by-side throwing device, when both signals are absent, the automatic switching deviceon the middle and low voltage side will be locked. The invention has the beneficial effects that: by adding additional locking logic into the middle and low-voltage side standby automatic throw operation, the possibility of the middle and low-voltage side standby automatic throw operation can be eliminated fundamentally, and the sensitivity of the middle and low-voltage side standby automatic throw operation is ensured. 本发