3 research outputs found
A Novel Power-Band based Data Segmentation Method for Enhancing Meter Phase and Transformer-Meter Pairing Identification
This paper presents a novel power-band-based data segmentation (PBDS) method
to enhance the identification of meter phase and meter-transformer pairing.
Meters that share the same transformer or are on the same phase typically
exhibit strongly correlated voltage profiles. However, under high power
consumption, there can be significant voltage drops along the line connecting a
customer to the distribution transformer. These voltage drops significantly
decrease the correlations among meters on the same phase or supplied by the
same transformer, resulting in high misidentification rates. To address this
issue, we propose using power bands to select highly correlated voltage
segments for computing correlations, rather than relying solely on correlations
computed from the entire voltage waveforms. The algorithm's performance is
assessed by conducting tests using data gathered from 13 utility feeders. To
ensure the credibility of the identification results, utility engineers conduct
field verification for all 13 feeders. The verification results unequivocally
demonstrate that the proposed algorithm surpasses existing methods in both
accuracy and robustness.Comment: Submitted to the IEEE Transactions on Power Delivery. arXiv admin
note: text overlap with arXiv:2111.1050
An Iterative Bidirectional Gradient Boosting Algorithm for CVR Baseline Estimation
This paper presents a novel iterative, bidirectional, gradient boosting
(bidirectional-GB) algorithm for estimating the baseline of the Conservation
Voltage Reduction (CVR) program. We define the CVR baseline as the load profile
during the CVR period if the substation voltage is not lowered. The proposed
algorithm consists of two key steps: selection of similar days and iterative
bidirectional-GB training. In the first step, pre- and post-event temperature
profiles of the targeted CVR day are used to select similar days from
historical non-CVR days. In the second step, the pre-event and post-event
similar days are used to train two GBMs iteratively: a forward-GBM and a
backward-GBM. After each iteration, the two generated CVR baselines are
reconciled and only the first and the last points on the reconciled baseline
are kept. The iteration repeats until all CVR baseline points are generated. We
tested two gradient boosting methods (i.e., GBM and LighGBM) with two data
resolutions (i.e., 15- and 30-minute). The results demonstrate that both the
accuracy and performance of the algorithm are satisfactory.Comment: 5 pages, 8 figures, 2 table
MultiLoad-GAN: A GAN-Based Synthetic Load Group Generation Method Considering Spatial-Temporal Correlations
This paper presents a deep-learning framework, Multi-load Generative
Adversarial Network (MultiLoad-GAN), for generating a group of load profiles in
one shot. The main contribution of MultiLoad-GAN is the capture of
spatial-temporal correlations among a group of loads to enable the generation
of realistic synthetic load profiles in large quantity for meeting the emerging
need in distribution system planning. The novelty and uniqueness of the
MultiLoad-GAN framework are three-fold. First, it generates a group of load
profiles bearing realistic spatial-temporal correlations in one shot. Second,
two complementary metrics for evaluating realisticness of generated load
profiles are developed: statistics metrics based on domain knowledge and a
deep-learning classifier for comparing high-level features. Third, to tackle
data scarcity, a novel iterative data augmentation mechanism is developed to
generate training samples for enhancing the training of both the classifier and
the MultiLoad-GAN model. Simulation results show that MultiLoad-GAN outperforms
state-of-the-art approaches in realisticness, computational efficiency, and
robustness. With little finetuning, the MultiLoad-GAN approach can be readily
extended to generate a group of load or PV profiles for a feeder, a substation,
or a service area.Comment: Submitted to IEEE Transactions on Smart Gri