Electrical Signals Databases

DATA_S.npz (sha256: e6bb851a89f58f6874df1788641204fcc60a2666d8e3b13c038676a56cd94056)

DATA_i.npz (sha256: 7a103da040f1e56e12bb1a3cb03c0c02cb0afbec0d811736fa685e5c7a025aa3)

DATA_u.npz (sha256: 204647569416d7f8010d4607058c9610db1407ad6a2f81cc0647f8c427d07209)

Citation:

@online{DatabaseRTE,
author = {Presvôts, Corentin and Prevost, Thibault},
title = {Database of Voltage and Current Samples Values from the French Electricity Transmission Grid, Réseau de Transport d'Electricité (RTE), France},
url = {[https://github.com/rte-france/digital-fault-recording-database/](https://github.com/rte-france/digital-fault-recording-database/)},
year = {2024},
}

Voltages and Current Database, DATA_S

This database comprises 12053 measured voltage and current waveform signals (phase-ground) on high voltage lines of the French electricity transmission grid during various faults.

Signal Characteristics

All signals are stored in a list DATA_S of shape (12053, 6, 21000)

• 12053 number of observed faults

• 6 signals per observed fault (v1, v2, v3, i1, i2, i3)

• 21000 samples per signal (3.28125s)

• Nominal frequency of the network 50 Hz

• Nominal voltage 90 kV

These signals are only a subset of all faults recorded, selected on waveform shape.

Sample Characteristics

The sampling frequency is 6400 Hz

The number of bits to encode a sample is 16 bits

Quantization levels range from -32767 to 32767

The quantization step size for voltage signals is 18.310 V

The quantization step size for current signals is 4.314 A

Examples of Observed Voltage and Current Signals

Signal 1

Signal 2

Signal 3

Transient Signals, DATA_u and DATA_i

The lists DATA_u and DATA_i are vectors of voltage and current signals derived from DATA_S.

DATA_u and DATA_i contain 30000 signals of size 128 samples, corresponding to one period of the nominal frequency of the network at 50 Hz.

To obtain DATA_u and DATA_i, each voltage signal is temporelly segmented into 128 samples. A transient selection criterion is applied to each segment. The signal is kept if:

• the standard deviation of the signal is greater than 100 times the quantization step (to remove windows where the signal amplitude changes little)
• if the mean absolute value of the signal is greater than 2000 V

If the voltage signal are retained, the current signal are also retained.
DATA_u[k] and DATA_i[k] are therefore derived from the observation of the same conductor.

Examples of Recovered Transient Voltage Signals

Download DATA_u, DATA_i, and DATA_S

Download the npz files DATA_S.npz, DATA_u.npz and DATA_i.npz

Space required to download the databases :

DATA_S.npz : 2 GB

DATA_u.npz : 10 MB

DATA_i.npz : 5 MB

then with python run:

import numpy as np
import matplotlib.pyplot as plt

DATA_S_load = np.load('DATA_S.npz')['DATA_S'] # Load DATA_S from the npz file 
DATA_u_load = np.load('DATA_u.npz')['DATA_u'] # Load DATA_u from the npz file
DATA_i_load = np.load('DATA_i.npz')['DATA_i'] # Load DATA_i from the npz file


## test 
print("DATA_S_load",np.shape(DATA_S_load))
print("DATA_u_load",np.shape(DATA_u_load))
print("DATA_i_load",np.shape(DATA_i_load))

t=np.linspace(0,(21000-1)/6400,21000)
for k in range(10):
    fig=plt.figure(figsize=(15,5),dpi=100)
    for i in range(3):
        plt.plot(t,DATA_S_load[k][i]*18.310,lw=2,label='v{}'.format(i+1))
        plt.xlabel('t (s)')
        plt.ylabel('Voltage (V)')
        plt.grid( which='major', color='#666666', linestyle='-')
        plt.legend()
        plt.minorticks_on()

    fig=plt.figure(figsize=(15,5),dpi=100)
    for i in range(3):            
        plt.plot(t,DATA_S_load[k][i+3]*4.314,lw=2,label='i{}'.format(i+1))
        plt.xlabel('t (s)')
        plt.ylabel('Courrent (A)')
        plt.grid( which='major', color='#666666', linestyle='-')
        plt.legend()
        plt.minorticks_on()   

Prerequisites

• numpy

• matplotlib.pyplot