Calculation Method Research about Theoretical Line Loss' Boundary of Distribution Network

2013 ◽  
Vol 860-863 ◽  
pp. 1955-1962 ◽  
Author(s):  
Xiang Hua Zhang ◽  
Jiang Zeng ◽  
Chang Ming Chen ◽  
Shao Hua Xiao
Keyword(s):  
Calculation Method ◽  
Ultimate Load ◽  
Current Method ◽  
Maximum Load ◽  
Load Curve ◽  
Line Load ◽  
Shape Coefficient ◽  
Distribution Transformers ◽  
Theoretical Line ◽  
Line Loss

Based on mastering the supply power and the maximum load of the 10kV distribution transformers, this paper calculated the maximum and minimum load shape coefficient of the transformers and segmented lines, and obtained the upper and lower limitation of the theoretical line loss with average current method. In the largest variable loss calculating process, this paper put forward an effective iterative fitting algorithm. Firstly, it fitted out the ultimate load curve of the transformer high voltage side, then it fitted through iteration out the ultimate load curve of the superior branch lines and calculated the maximum shape coefficient, considering the influence of transformers loss on the line load curve in the calculation process. The calculation method provided theory evidence for enterprise line loss management level evaluation and vulnerable spot location in the line loss management and enterprise future line loss rate indicator setting.

Research on intelligent calculation method of theoretical line loss in station area

2021 ◽  
Author(s):  
Songhui Zhang ◽  
Hongxia Zhu ◽  
Congcong Li ◽  
Tao Liu ◽  
Yuqi Zang ◽  
...  
Keyword(s):  
Calculation Method ◽  
Theoretical Line ◽  
Line Loss

scholarly journals MODELAGEM DA CURVA DE CARGA DE TRANSFORMADORES DE DISTRIBUIÇÃO / LOAD CURVE MODELING OF DISTRIBUTION TRANSFORMERS

2021 ◽  
Vol 7 (1) ◽  
pp. 3331-3340
Author(s):  
Alzenira da Rosa Abaide ◽  
Giovana Bortoluzzi Brondani ◽  
Jordan Passinato Sausen
Keyword(s):  
Load Curve ◽  
Distribution Transformers ◽  
Curve Modeling

Theoretical Line Loss Calculation of Distribution Network Considering Wind Turbine Power Constraint

2014 ◽  
Vol 986-987 ◽  
pp. 630-634 ◽  
Author(s):  
Ke Li ◽  
Zhen Quan Sun ◽  
Meng Wang
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Wind Turbine ◽  
Real Time ◽  
Power Flow ◽  
Time Measurement ◽  
Power Constraint ◽  
Real Time Measurement ◽  
Theoretical Line ◽  
Line Loss

This paper presents a theoretical line loss calculation of distribution network containing an uncertainty power of wind turbine. First, this paper establishes the theoretical line loss mathematical model considering wind turbine power constraint within the sampling period. Then this paper gets multi group wind turbine output data satisfied the power constraints through Monte Carlo simulation. By combining with the first power coefficient method and Monte Carlo simulation technique, this paper also generates multi groups load pseudo measurement test of non real time. By combining the real-time measurement of power flow calculation, a group of simulated data with minimum error between the power flow results and the real time measurement are selected. Finally based on the selected pseudo measurement, the theoretical line loss within the given time period based on periodic accumulative calculation of real-time measurement are calculated. 14 nodes example is given to verify the accuracy and practicality of the algorithm.

scholarly journals Optimal Phase Arrangement of Distribution Transformers for System Unbalance Improvement and Loss Reduction

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 545 ◽  
Author(s):  
Chia-Sheng Tu ◽  
Ming-Tang Tsai
Keyword(s):  
Distribution System ◽  
Load Flow ◽  
Phase Selection ◽  
Customer Information ◽  
Distribution Transformers ◽  
Three Phase ◽  
Phase Combination ◽  
Line Loss ◽  
Operating Constraints ◽  
Selection Of

This paper presents an efficient strategy for transformer planning to reduce the system losses by means of transformer rearrangement. The customer connected to the distribution transformer are first investigated by the field survey, and the loads of the various customers are collected from the customer information system (CIS) and distribution database system (DAS) to derive their load patterns. The objective function is to minimize the total line loss in the 24 intervals. An improved bacterial foraging algorithm (IBFO) is proposed herein to find the optimal phase combination of distribution transformers to minimize the total line loss by considering operating constraints. A three-phase load flow program with Eeuivalent current injection (ECT) is used to solve the total line loss and system unbalance factor on a Taipower distribution system. The results can help operators not only perform the proper installation phase selection of distribution transformers, but also reduce the system losses, decrease the system unbalance factor, and improve the voltage profiles of the buses.

scholarly journals CIM-based Data-sharing Scheme for Online Calculation of Theoretical Line Loss

2012 ◽  
Vol 16 ◽  
pp. 1619-1626
Author(s):  
Yan Zhang ◽  
Yun Zhu ◽  
Xiaoqing Bai ◽  
Hua Wei
Keyword(s):  
Data Sharing ◽  
Sharing Scheme ◽  
Theoretical Line ◽  
Line Loss

scholarly journals Finite Element Analysis of Cracked One-Way Bubbled Slabs Strengthened By External Prestressed Strands

2021 ◽  
Vol 27 (1) ◽  
pp. 45-65
Author(s):  
Falah Hassan Ibrahim ◽  
Ali Hussein Ali
Keyword(s):  
Ultimate Load ◽  
Load Capacity ◽  
The Other ◽  
Ultimate Load Capacity ◽  
Element Analysis ◽  
Line Load ◽  
External Prestressing ◽  
Service Charge ◽  
External Strengthening ◽  
Initial Capacity

Bubbled slabs can be exposed to damage or deterioration during its life. Therefore, the solution for strengthening must be provided. For the simulation of this case, the analysis of finite elements was carried out using ABAQUS 2017 software on six simply supported specimens, during which five are voided with 88 bubbles, and the other is solid. The slab specimens with symmetric boundary conditions were of dimensions 3200/570/150 mm. The solid slab and one bubbled slab are deemed references. Each of the other slabs was exposed to; (1) service charge, then unloaded (2) external prestressing and (3) loading to collapse under two line load. The external strengthening was applied using prestressed wire with four approaches, which are L1-E, L2-E, L1-E2, and L2-E2, where the lengths and eccentricities of prestressed wire are (L1=1800, L2=2400, E1=120 and E2=150 mm). The results showed that each reinforcement approach restores the initial capacity of the bubbled slab and improves it in the ultimate load capacity aspect. The minimum and maximum ultimate strength of strengthened cracked bubbled slab increased by (17.3%-64.5%) and (25.7%-76.3%) than solid and bubbled slab, respectively. It is easier to improve behavior with an increased eccentricity of the prestressed wire than to increase its length.

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