Strengthening Auxiliary Strategy of Provincial High-Voltage Power Grid in Response to Severe Natural Disasters

doi:10.12204/j.issn.1000-7229.2022.06.013

Abstract

Abstract:

Extreme natural disasters such as typhoons and earthquakes will easily destroy operating equipment and leading to large-scale fault of the power grid and power outages, so there is an urgent need for effective measures to assist the dispatching of complex power grid in order to prevent and deal with the faults caused by disasters. In this paper, the current coordinated control technology of generation-grid-load three sides after the fault of the high-voltage grid is introduced. In addition, according to the calculation of connectivity of weak links between and in stations, the resilient power grid construction technology which include network strengthening strategies for the hot standby lines operation and the bus tie switches closing with their technical implementation methods are proposed in detail. Finally, case studies on the high-voltage grid model of A province power grid prove that the strategy can effectively reduce the loss of power grid fault and provide reasonable auxiliary decision-making for power grid dispatching work.

Key words: network strengthening, hierarchical database (HIDB), high-voltage power grid, fault prevention

CLC Number:

TM732

MA Chenxiao, DAI Zemei, HU Chaofan, LUO Yuchun, WANG Yi, ZHANG Xiaocong, SHAN Xin. Strengthening Auxiliary Strategy of Provincial High-Voltage Power Grid in Response to Severe Natural Disasters[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(6): 119-127.

Figures/Tables 13

Table 1 Load status of Zhejiang Power Grid before and after typhoon

Fig.1 Load curve of Taizhou during typhoon

Table 2 The impact of typhoon on Zhejiang high-voltage grid

Fig.2 Framework of generation-grid-load disposal

Fig.3 Framework of high-voltage grid strengthening strategy

Fig.4 Relationship diagram between HIDB and external interface

Fig.5 Implementation steps of grid strengthening strategy

Table 3 Number of 220 kV equipment

Table 4 Line information of 220 kV substation JF

Fig.6 Case of strategy for hot standby lines operation

Fig.7 Operating condition of 220 kV XW substation

Table 5 Switch strategy for 220 kV XW substation

Table 6 Strategy result after the fault of line RX-2P03 MW

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