Power distribution network power supply capacity evaluation method considering N-1 criterion

Abstract

The invention belongs to the field of power distribution systems, and relates to a method for estimating the power supply capacity of a power distribution system, which takes the 'N-1' Principle into account. The method comprises the following steps: (1) the data of the power distribution system is collected; (2) the topology of the power distribution system is simplified, and the contact information is acquired; (3) the interconnection relation of the main transformer is analyzed to form a main transformer communication relational matrix; (4) the 'N-1' analysis of a communication unit is performed; (5) the analysis result of the step (4) is integrated to obtain the maximum allowable load factor of the main transformer; and (6) the maximum power supply capacity of the system is calculated based on the analysis result in the step (5). The invention overcomes the defects that the conventional power distribution system is based on flow and iterative optimization, takes the capacity constraint of the actual line and the in-station priority transfer factor of a transformer station into account, provides the maximum power supply capacity of the power distribution system based on the 'N-1' Principle and the one-time calculation of the interconnection relation, and finds out the network bottleneck when in calculation, thereby providing the reference basis for optimization and planning of the power distribution system.

Description

technical field [0001] The invention belongs to the field of power distribution systems, and relates to a method for evaluating the power supply capacity of a power distribution system in consideration of the "N-1" criterion. Background technique [0002] The urban power distribution system is an important infrastructure and a necessary energy supply system for urban modernization. For a long time, the power grids in many cities in my country have suffered from insufficient power supply capacity, uncertain network transfer capabilities, low utilization of power grid equipment, unbalanced loads, and large losses. As demand for electricity continues to increase, so does the need for continuous expansion of the grid. In order to adapt to the rapid economic development and the rising power load, make the distribution network construction adapt to the development of the main network, and avoid repeated construction and investment, it is necessary to do a good job in the optimiza...

AI Technical Summary

Problems solved by technology

[0014] The existing power supply capacity analysis methods are generally cumbersome, and accurate results may not be obtained when the network is complex, and the bottleneck equipment of the network cannot be quickly found; and the "N-1" criterion for the safety of urban power supply is not considered

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