1 kV capacitor detection method

(PDF) Detecting breakdowns in capacitor voltage transformers: A

PDF | On Feb 1, 2024, Chuanji Zhang and others published Detecting breakdowns in capacitor voltage transformers: A knowledge-assisted online approach | Find, read and cite all the

Self-detection method for measurement error of capacitor

Therefore, real-time detection methods are required to determine the measurement error of CVTs without power outage, to timely grasp the measurement error

Self-detection method for measurement error of capacitor

Thus, this study first analyzes the basic principle of the CVT measurement error self-detection method based on principal component analysis under the constraints of three

Online Detection Method for Capacitor Voltage Transformer

A robust detection and diagnosis method for incipient faults under the principal component analysis that can detect all incipient sensor faults in traction systems of high-speed trains in

New Method of Capacitors Failure Detection and Location in

New Method of Capacitors Failure Detection and Location in Shunt Capacitor Banks Hesam Jouybari -Moghaddam–Western University 138 kV 138kV / 33kV 25 MVar 20 Ω 0.008 H 20.

CN102749525A

The invention relates to the field of electronics, and discloses a capacitor detection method and a capacitor detection circuit. According to the method, the voltage of a negative input

An online detection method for capacitor voltage transformer with

To address this problem, several online methods have been proposed, which can be divided into three categories: the precise modeling method, the signal processing method,

Self-detection method for measurement error of capacitor voltage

Therefore, real-time detection methods are required to determine the measurement error of CVTs without power outage, to timely grasp the measurement error

An online detection method for capacitor voltage transformer

In this paper, an online detection method based on load classification has been proposed. Several identification parameters are first put forward to classify loads. With these

Analysis of capacitor detection methods-EEWORLD

The detection of capacitors is mainly divided into three categories: fixed capacitor detection, electrolytic capacitor detection, and variable capacitor detection. 1. Detection of fixed capacitors

Transient inrush current detection and classification in 230 kV

The substation shunt capacitor bank is the model shown in Fig. 1 . A four-step capacitor bank rated at 72 Mvar, 230 kV was used to investigate the high-transient inrush

Online Detection Method for Capacitor Voltage Transformer

To address the problem of insufficient real-time periodic calibration using standard transformers, this article proposes an online detection method for CVT measurement

Self-detection method for measurement error of capacitor voltage

Thus, this study first analyzes the basic principle of the CVT measurement error self-detection method based on principal component analysis under the constraints of three

An online detection method for capacitor voltage transformer

To address this problem, several online methods have been proposed, which can be divided into three categories: the precise modeling method, the signal processing method,

Detecting breakdowns in capacitor voltage transformers: A

The metering winding noted as 1 a − 1 n in Fig. 1 is the best signal source for the detection method attributed to its stable burden and high accuracy. The CVT function

Transient inrush current detection and classification in 230 kV

Transient inrush current detection and classification in 230 kV shunt capacitor bank switching under various transient-mitigation methods based on discrete wavelet

A review on partial discharge diagnosis in cables: Theory,

IEC 60502 (up to 35 kV) and IEEE 400.2 (up to 69 kV) provide the test methods for cable testing employing VLF. 3.1.3. Damped AC (DAC) voltage test In the conventional

Detecting breakdowns in capacitor voltage transformers: A

In this study, we present an unsupervised online poor contact detection method. It first exploits a time series similarity matrix derived from the measured voltage data. The

A test method for 220 kV capacitive voltage transformer

Some specific methods are put forward to measure the C 1, C 2 capacitance and dielectric loss of 220 kV CVT respectively by using the method of self-excitation. Discover the

Self-detection method for measurement error of capacitor

ZhangZhu,1,a) LuHeng,1 andLiBinbin1,2 AFFILIATIONS 1 School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, People''s Republic

1 kV capacitor detection method [PDF]

6 FAQs about [1 kV capacitor detection method]

What is the measurement error of capacitor voltage Transformers (CVTs)?

The measurement error of capacitor voltage transformers (CVTs) has poor stability under the complex environment of substations. Conventionally, error detection is performed by regularly comparing the output of standard transformers, which lacks real-time performance. Moreover, CVTs are prone to operating in an out-of-tolerance state.

Why are capacitor voltage transformers prone to error detection?

The measurement error of capacitor voltage transformers (CVTs) has poor stability under the complex environment of substations. Con-ventionally, error detection is performed by regularly comparing the output of standard transformers, which lacks real-time performance. Moreover, CVTs are prone to operating in an out-of-tolerance state.

Do uncalibrated capacitive voltage transformers degrade measurement accuracy?

Uncalibrated capacitive voltage transformers (CVTs) may significantly degrade measurement accuracy, because of the undetected excessive measurement error (ME). In this article, an online detection method is proposed which combines multi-source heterogeneous data composed of CVT measurements, acceptance test errors, and error limits.

What is the most accurate device for voltage sampling?

In the practical substation, the most accurate device for voltages sampling are the energy meter with 0.2% ratio error, which is too rough to estimate the CVTs with this PCA method. Therefore, the wide application of high-accuracy energy meters is the foundation of this method.

Why are capacitor voltage transformers used in power systems?

As a key equipment for signal acquisition in power systems, capacitor voltage transformers (CVTs) are widely used in 110 kV and above power systems due to their excellent insulation perfor-mance and low cost. Moreover, their measurement error is easily affected by various factors during operation,1–7 resulting in lower stability.

Does analog-to-digital conversion equipment affect self-detection results of CVT measurement errors?

Then, the impact of the signal conversion error of analog-to-digital conversion equipment on the self-detection results of CVT measurement errors in engineering applications is analyzed, and a multi-layer wavelet analysis signal denoising method is proposed to enhance the self-detection ability of CVT measurement errors.

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