Optimal power and capacity selection method of mobile battery energy storage DC-based deicing system

Abstract

The invention relates to an optimal power and capacity selection method of a mobile battery energy storage DC-based deicing system. The method comprises the following steps: step S1: providing a mobile battery energy storage DC-based deicing system, wherein the DC-based deicing system comprises a battery energy storage system, a bidirectional converter, a DC / DC converter, a background monitor and switch combination; step S2, carrying out statistics on the distribution of ice regions of a power grid; step S3, calculating the current value of the DC-based deicing system in the DC-based deicing process; and step S4, calculating deicing powers, deicing capacities and optimization functions of the DC-based deicing system under three deicing modes of "1-1, 1-2", "1-1, 1-1", "1-2, 1-2, 1-2". Starting from the angle of system cost, according to the conditions of ice regions, the state grid guideline and the actual situation of lines of mountainous areas, the method can be used for putting forwards a cost optimization function by calculating the powers and capacities of the DC-based deicing system under three deicing modes, thereby providing a basis for selection of power and capacity of the mobile battery energy storage DC-based deicing system.

Description

technical field [0001] The invention relates to the field of ice melting systems, in particular to a power and capacity optimal selection method for a mobile battery energy storage DC ice melting system. Background technique [0002] Ice and snow disasters have serious harm to power grids, traffic, and crops. Severe ice coating on power transmission and distribution lines will lead to a sharp decline in their mechanical and electrical performance, resulting in ice accidents. Although Fujian Province is located in southern China, the distribution network lines in the high-altitude mountainous areas of northern, eastern and western Fujian are often covered with ice in winter, which has a very adverse impact on the daily life of residents and industrial and agricultural production. In 2008, especially Seriously, strong cold air began to invade Fujian Province from the end of January. The low temperature lasted for more than ten days, accompanied by freezing rain, freezing snow,...

AI Technical Summary

Problems solved by technology

Although Fujian Province is located in southern China, the distribution network lines in the high-altitude mountainous areas of northern, eastern and western Fujian are often covered with ice in winter, which has a very adverse impact on the daily life of residents and industrial and agricultural production. In 2008, especially Seriously, strong cold air began to invade Fujian Province from the end of January. The low temperature lasted for more than ten days, accompanied by freezing rain, freezing snow, and ice covering. The power grid facilities were damaged in a large area. Many transmission and distribution lines were disconnected and disconnected due to ice covering. , collapsed towers and forced to stop operation, resulting in severe damage to the 220kV and below systems in northwestern Fujian, Jianning, Shaowu, Guangze, Ninghua, Pucheng, Changting, Taining, Shanghang, Wuyishan, Wuping 26 counties (cities) ) Some villages and towns suffered varying degrees of losses, among which the five counties and cities of Jianning, Shaowu, Guangze, Ninghua, and Pucheng were the most serious, and large-scale power outages occurred in 35kV and below power grids

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