Integrated evaluation method for distribution system

Abstract

The invention provides an integrated evaluation method for a distribution system. The method comprises (1), an electric parameter, an element reliability parameter, and an initial network topological structure of a distribution system are obtained and a system reliability evaluation model is established; (2), a non-normal operation state of the distribution system is selected, reactive power compensation and optimization are carried out to realize correction and improvement, and then power supply reliability is evaluated; (3), a system state is generated, a non-normal state different from the previously listed non-normal state of the system is selected and the step (2) is repeated until a convergence condition is met; and (4), a reliability index and an overall power quality index of the whole distribution system are calculated and outputted. According to the method, reliability evaluation of the distribution system and system state correction are combined and correction on the non-abnormal operation state of the system is added, so that the voltage and wire losses are improved and the switching load in a non-abnormal state of the system is reduced. Therefore, indexes of the overall reliability and power quality of the system are improved correspondingly; and the integrated operation monitoring evaluation capability of the distribution network is enhanced obviously.

Description

technical field [0001] The invention belongs to the field of power distribution systems, and in particular relates to a comprehensive evaluation method for power distribution systems. Background technique [0002] The reliability evaluation of power system has become a basic index related to the quality of power supply. In the past, reliability research mainly focused on the reliability evaluation of power generation systems or combined power systems composed of power generation and transmission, while the reliability research of power distribution systems, especially medium and low voltage power distribution systems, has not received due attention. With the rapid development of my country's social economy in recent years, the pace of urban network transformation has been accelerated, and the reliability assessment of power distribution systems has received due attention. So far, great progress and development have been made. While power consumption has increased accordingl...

AI Technical Summary

Problems solved by technology

However, most of the modeling and algorithm theories are based on fixed operation modes, constant component reliability models and parameters, ignoring the influence of changes in real-time operating conditions such as line power flow, bus voltage, and system frequency on the component outage probability, and ignoring The impact of real-time operating conditions such as the operating mode of the unit, real-time changes in load, and network structure changes on the consequences of failures

[0004] The traditional static reliability evaluation cannot satisfy the reliability evaluation of the distribution network in operation due to its low online real-time performance. Meeting the needs of national production is a problem that needs serious consideration

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