Seasonal Influence on Safety of Substation Grounding


With the development of modern power system to the direction of extra-high voltage, large capacity, far distance transmission and application of advanced technologies the demand on the safety, stability and economic operation of power system became higher. A good grounding system is the fundamental insurance to keep the safe operation of the power system. The good grounding system should ensure the following:

To provide safety to personnel ....etc

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1.The dynamic viscosity of most of the gases______________with rise in temperature.
(A)Increases(B) Decreases
(C ) Does not change significantly (D) None of these

2.)Buoyant force is___________.
(A)Resultant of up thrust and gravity forces acting on the body
(B)Resultant force on the body due to the fluid surrounding it
(C )Equal to the volume of liquid displaced by the body
(D)Resultant of static weight of body and dynamic thrust of liquid

3.)The type of flow in which the velocity of every particle varies from ....etc

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Introduction

With the development of modern power system to the direction of extra-high voltage, large capacity, far distance transmission and application of advanced technologies the demand on the safety, stability and economic operation of power system became higher. A good grounding system is the fundamental insurance to keep the safe operation of the power system. The good grounding system should ensure the following:

To provide safety to personnel during normal and fault conditions by limiting step and touch potential.
To assur ....etc

[:=Read Full Message Here=:]

Introduction

With the development of modern power system to the direction of extra-high voltage, large capacity, far distance transmission and application of advanced technologies the demand on the safety, stability and economic operation of power system became higher. A good grounding system is the fundamental insurance to keep the safe operation of the power system. The good grounding system should ensure the following:

To provide safety to personnel during normal and fault conditions by limiting step and touch potential.
To assur ....etc

[:=Read Full Message Here=:]

The low or high resistivity soil layer formed in raining or freezing season affects the safety of grounding system, and leads the changes of grounding resistance of the grounding system, step and touch voltages on the ground surface.

This paper systematically discusses the seasonal influence on the safety of grounding system and the different methods to be adopted inorder to nullify the effect of seasonal changes.
Inorder to nullify the effect of the seasonal changes we can use long vertical grounding electrodes or by using chemically cha ....etc

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Seasonal Influence on Safety of Substation Grounding

Introduction
The low or high resistivity soil layer formed in raining or freezing season affects the safety of grounding system, and leads the changes of grounding resistance of the grounding system, step and touch voltages on the ground surface.

This paper systematically discusses the seasonal influence on the safety of grounding system and the different methods to be adopted inorder to nullify the effect of seasonal changes. Inorder to nullify the effect of the seasonal changes we c ....etc

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