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A Novel Method for Fault Detection of Three Phase Transmission Lines by Wide Area Voltage Measurements in IOT
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A Novel Method for Fault Detection of Three Phase Transmission Lines by Wide - Area Voltage Measurements in IOT

Category : Internet Of Things

Sub Category : Energy management

Project Code : ITIOT5

Project Abstract

Smart transmission grids are intended to utilize various measurements for enhanced operation. In particular, synchronized phasor measurements have found many applications in this context. This paper presents a linear weighted least-squares(WLS) method for fault location estimation of transmission lines by synchronized voltage measurements. The measurements may be taken from the faulted line terminals or buses far from the faulted line. The circuit equations of the network are used to find the transfer function between the fault location and each voltage measurement. Next, two auxiliary variables are defined to transform the nonlinear fault location estimation problem into a linear WLS problem. A closed-form solution is then obtained for fault location. The use of multiple measurements provides the opportunity of identifying erroneous measurements by a statistical test. The linearity of the problem expedites both estimation and identification procedures. Moreover, the method requires neither to classify the fault type nor to estimate the fault resistance. Furthermore, transmission lines are modeled by distributedparameters so that the method can be applicable to long lines. Electromagnetic transient simulations for 9-bus and 22-bus test systems reveal accurate fault location estimation, regardless of fault type and resistance, as well as successful identification of measurement errors

Existing system

Proposed  system

Ø The time needed to determine the fault point along the line will affect the quality of the power delivery

Ø  Need to do some calculation.

Ø  RS232 communication only available


Drawbacks existing system:

Ø  Chances for human error while reading.

Ø  Only devices are available with wired communication

Ø The devices are enabled by wireless communication (Zigbee).

Ø  The fault that occurs at a particular distance of  a particular phase.

Ø  Driver circuit is used to protect the device

Advantages proposed system:

Ø  Less no. of components only needed.

Ø  Faster and reliable in operation.

Ø  Operational cost is low.

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