Feasibility analyzing method for accessing distributed power supplies into transformer station based on voltage deviation

Abstract

The invention discloses a feasibility analyzing method for accessing distributed power supplies into a transformer station based on voltage deviation. The feasibility analyzing method comprises the following steps of (1) extracting voltage data of a power distribution network through a data acquisition system; (2) calculating the voltage deviation; (3) calculating the limit range of the power distribution network of the transformer station; and (4) calculating the maximal accessing scale of the power distribution network of the transformer station which accesses into the distributed photovoltaic power generation system. The data which is extracted from the step (1) are extracted and the voltage deviation of the power distribution network of the transformer station is calculated. According to a standard requirement, the limit range of the voltage of the power distribution network of the transformer station is obtained. The P-U relationship of different load characteristics of the power distribution network of the transformer station is obtained through analyzing according to a voltage stability P-U curve. The maximal value of the active power of the distributed photovoltaic power generation system which is accessed into the transformer station can be obtained according to the current, the receive-side voltage and a power relationship. Furthermore the maximal accessing scale of the power distribution network of the transformer station which accesses into the distributed photovoltaic power generation system is obtained.

Description

technical field [0001] The invention relates to the field of intelligent substations, relates to power system stability analysis, and in particular to a feasibility analysis method for distributed power sources connected to substations based on voltage deviation. Background technique [0002] Smart substation adopts advanced, reliable, integrated, low-carbon, and environmentally friendly smart equipment, and takes the digitalization of the whole station information, the networking of the communication platform, and the standardization of information sharing as the basic requirements, and automatically completes information collection, measurement, control, protection, measurement, and monitoring. And other basic functions, and can realize advanced functions such as real-time automatic control of the power grid, intelligent adjustment, online analysis and decision-making, and collaborative interaction according to needs. Therefore, the smart substation realizes unattended ope...

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Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a feasibility analysis method for distributed power sources connected to substations based on voltage deviations, and to solve the problem of static voltage deviations in local nodes of the distribution network after large-scale distributed photovoltaics are connected. , the technical problem that the distribution network, especially the low-voltage network, is sensitive to voltage changes

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