Main-distribution integrated online real-time closed-loop analysis method based on CIM/SVG

Abstract

The invention discloses a main-distribution integrated online real-time closed-loop analysis method based on CIM / SVG, which is characterized by comprising the steps of establishing a main-distributionnetwork integrated model; analyzing the model to determine a loop closing path; and performing power flow calculation before and after loop closing on the loop closing path, and performing safety verification according to the closed-loop power flow calculation result to obtain a conclusion on whether the closed loop is successful or not and an adjustment suggestion. The invention has the advantages that the safety verification of the closed loop is provided through closed-loop analysis, the conclusion on whether the closed loop is successful or not is obtained, corresponding adjustment measures and suggestions are provided for the closed loop which does not pass the safety verification, the judgment information of whether the closed loop condition is met after the adjustment is provided,operation dispatchers are enabled to know the closed-loop operation result more visually and clearly through the closed-loop analysis, and meanwhile, the dispatchers can also be facilitated to realizethe closed-loop operation timely, effectively and quickly.

Description

technical field [0001] The invention relates to the field of power system power flow calculation, in particular to a CIM / SVG-based online real-time loop-closing analysis method for master-distribution integration. Background technique [0002] With the rapid development of distribution network construction and the gradual expansion of scale, customers have higher and higher requirements on the power supply capacity of power grid enterprises. Power grid enterprises need to continuously improve the level of distribution network closure, reduce frequent power outages for users, and improve the quality of power supply in distribution networks. [0003] The distribution network adopts closed-loop wiring and open-loop operation. Realizing load transfer through loop closing operation is an important means for regulators in the adjustment of distribution network mode and fault handling process, and it is also an important guarantee for improving the reliability of power supply in di...

AI Technical Summary

Problems solved by technology

However, the steady-state current of each transformer through the closing of the distribution line and the impact current of the closing of the ring at the moment of closing may cause equipment overload or even tripping of the relay protection action.

[0004] Facing the technical difficulties of loop closing and unpacking verification, the technical difficulties are the same. The loop closing and unpacking current only calculates the steady-state current after loop closing, and does not calculate the impact current at the instant of loop closing; There is a lack of analysis tools to check the phase angle difference; it may only consider the impact on the relay protection of the substation outlet switch, and does not consider the installation of smart switches on the pole on the distribution line and smart switches in the ring network cabinet. The impact of relay protection; even if the loop closing operation is calculated in advance, there is still a lack of feasible measurement equipment and measurement schemes to conduct actual measurements to verify the error of the theoretical calculation value of the loop closing operation, and the main network above 10kV has been subjected to different degrees of equivalent processing , which greatly reduces the calculation accuracy of the loop closing current and affects the correctness of the loop closing decision analysis

Does not consider the evaluation of whether the loop closing check conditions are met after the calculation of the loop closing current; there is a large error between the loop closing calculation results and the actual operation; if the loop closing current calculation does not meet the loop closing check conditions, such as adjusting the bus Feedback suggestions for technical measures such as voltage adjustment, transformer tap adjustment, and load distribution adjustment. Therefore, improving technical measures to realize the practical application of power flow calculation for distribution network closure requires more technical exploration

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