Relation formulation between daily and hourly load curve based loss of load expectation indices

2016 ◽  
Author(s):  
Yeonchan Lee ◽  
Ungjin Oh ◽  
Duy-Phuong N. Do ◽  
Jaeseok Choi ◽  
Hongseok Choi ◽  
...  
Keyword(s):  
Load Curve ◽  
Loss Of Load Expectation

Evaluating hardness and the S-test

TAPPI Journal ◽  
2019 ◽  
Vol 18 (3) ◽  
pp. 161-169
Author(s):  
Doug Cash ◽  
Benjamin Frank
Keyword(s):  
North American ◽  
Test Method ◽  
Load Curve ◽  
Permanent Damage ◽  
Additional Load ◽  
The North ◽  
Complete Failure

The corrugated industry typically quantifies crush resistance using the Concora corrugated medium test (CMT) on fluted medium or flat crush on combined board. These tests compress the materials until the point of complete failure of the flutes. Combined board elastically resists crushing forces until a certain point, the hardness of the structure, while additional load causes permanent damage and deformation. This study investigates how hardness can be measured directly from a load curve collected during CMT (or flat crush) testing and how it varies throughout the North American paper supply. It also explores how hardness correlates with the values obtained from the newly developed S-test. This new test method deserves further study as a potentially more appropriate specification for crush resistance of corrugated medium.

A Study of a Next Day Electric Load Curve Forecasting Method and its Accuracy Improvement

2014 ◽  
Vol 134 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Hisatomo Miyata ◽  
Kazutoshi Miyashita ◽  
Takayuki Endo ◽  
Yuichi Shimasaki ◽  
Tatsuya Iizaka ◽  
...  
Keyword(s):  
Electric Load ◽  
Load Curve ◽  
Accuracy Improvement ◽  
Forecasting Method

scholarly journals A New Peak-Shaving Model Based on Mixed Integer Linear Programming with Variable Peak-Shaving Order

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 887
Author(s):  
Xianliang Cheng ◽  
Suzhen Feng ◽  
Yanxuan Huang ◽  
Jinwen Wang
Keyword(s):  
Linear Programming ◽  
Power Systems ◽  
Integer Linear Programming ◽  
Mixed Integer Linear Programming ◽  
Mixed Integer ◽  
Time Interval ◽  
Renewable Energy Resources ◽  
Load Curve ◽  
Peak Shaving ◽  
Model Based

Peak-shaving is a very efficient and practical strategy for a day-ahead hydropower scheduling in power systems, usually aiming to appropriately schedule hourly (or in less time interval) power generations of individual plants so as to smooth the load curve while enforcing the energy production target of each plant. Nowadays, the power marketization and booming development of renewable energy resources are complicating the constraints and diversifying the objectives, bringing challenges for the peak-shaving method to be more flexible and efficient. Without a pre-set or fixed peak-shaving order of plants, this paper formulates a new peak-shaving model based on the mixed integer linear programming (MILP) to solve the scheduling problem in an optimization way. Compared with the traditional peak-shaving methods that need to determine the order of plants to peak-shave the load curve one by one, the present model has better flexibility as it can handle the plant-based operating zones and prioritize the constraints and objectives more easily. With application to six cascaded hydropower reservoirs on the Lancang River in China, the model is tested efficient and practical in engineering perspective.

Experimental modeling of adjacent parallel shield tunnels subjected to train-induced vibration loads

2021 ◽  
pp. 095440972098626
Author(s):  
Junchen Zhang ◽  
Qixiang Yan ◽  
Kai Yang ◽  
Minghui Sun
Keyword(s):  
Experimental Studies ◽  
Bimodal Distribution ◽  
Dominant Frequency ◽  
Experimental Modeling ◽  
Load Curve ◽  
Hilbert Huang Transform ◽  
Frequency Peak ◽  
Train Speed ◽  
Vibration Loads ◽  
Train Induced Vibration

Previous studies have performed numerical simulations of adjacent parallel shield tunnels under train-induced vibration loads. However, few experimental studies have been performed for the interaction mechanisms. In this study, experimental modeling is conduced to explore the interaction of adjacent parallel shield tunnels subjected to different train-induced vibration loads. A new Hilbert-Huang transform (HHT) is applied to obtain the instantaneous responses of tunnels. The results show that the acceleration of the tunnel follows the trend of the train load curve. The peak accelerations of the tunnels experience a unimodal distribution along the train speed, while the dominant frequencies of the tunnels follow a bimodal distribution. The interaction between the adjacent parallel tunnels is significant. The transform of the vibration loads to the adjacent tunnel is through the soil below the tunnel. The farther away from the train load is, the greater the train speed corresponding to the dominant frequency peak.

scholarly journals Automated Load Curve Data Cleansing in Power Systems

2010 ◽  
Vol 1 (2) ◽  
pp. 213-221 ◽  
Author(s):  
Jiyi Chen ◽  
Wenyuan Li ◽  
Adriel Lau ◽  
Jiguo Cao ◽  
Ke Wang
Keyword(s):  
Power Systems ◽  
Load Curve ◽  
Data Cleansing

Some Aspects of Sampling Load Curve Data On Distribution Systems

1985 ◽  
Vol PAS-104 (11) ◽  
pp. 3221-3228 ◽  
Author(s):  
H. Willis ◽  
T. Vismor ◽  
K. Powell
Keyword(s):  
Distribution Systems ◽  
Load Curve
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