**Author details**

Sharad W. Mohod *Ram Meghe Institute of Technology & Research,Badnera-Amravart, India* 

Mohan V. Aware *Visvesvaraya National Institute of Technology, Nagpur, India* 

#### **5. References**

34 An Update on Power Quality

network.

**4. Conclusion** 

point of common coupling and the phase angle

significant impact on the power system operation.

*Ram Meghe Institute of Technology & Research,Badnera-Amravart, India* 

*Visvesvaraya National Institute of Technology, Nagpur, India* 

reliability and for power quality.

**Author details** 

Sharad W. Mohod

Mohan V. Aware

The wind turbine generator (WTG) shall be equipped with voltage and frequency relays for disconnection of the wind farm at abnormal voltages and frequencies. The relays shall be set according to agreements with the regional grid company and the system operator. Following

**Voltage Rise (u)** -The voltage rise at the point of common coupling can be approximated as a function of maximum apparent power Smax of the turbine, the grid impedances R and X at the

**Voltage dips (d) -** The voltage dips is due to start up of wind turbine and it causes a sudden

**Flicker**-The measurements are made for maximum number of specified switching operation of wind turbine with 10-minutes period and 2-hour period are specified. The Limiting Value

*Harmonics The THD limit for KV is* 132 3%.

**Grid frequency-** The grid frequency in India is specified in the range of 47.5-51.5 Hz, for wind farm connection. The wind farm shall able to withstand change in frequency up to 0.5Hz/sec. Thus the requirements in the Grid Code can be fulfill the technical limits of the

The chapter provides the challenges regarding the integration of wind energy in to the power systems. Today the worldwide trend of wind power penetration is increased. The integration of high penetration level of wind power into existing power system has

The wind turbines connected to weak grids have an important influence on power system. The weak grid is characterized by large voltage and frequency variations, which affects wind turbines regarding their power performance, safety and allied electrical components. The strength of the distribution system is important from the point of power quality. The needs for consistent qualification of power quality characteristics of wind turbines, the International Electro-Technical Commission to facilitate for power quality parameters for various issues are presented. The latest grid code requirements are to ensure that wind farms do not adversely affect the power system operation with respect to security of supply,

. The Limiting voltage rise value is < 2%

are the technical requirements to be fulfilled to integrate the wind generation system.

reduction of voltage. The acceptable voltage dips limiting value is 3 %.

for flicker coefficient is about 0.4, for average time of 2 hours


[17] S.W.Mohod, S.M.Hatwar, M.V.Aware. "Wind Energy Generation Interfaced System with Power Quality and Grid Support" Journal of Advanced Materials Research, Volumes 403 - 408, Tech Publication Swizerland, pp.2079-2086, Nov.2011.

**Section 2** 

**Power Quality Improvement in Transmission** 

**and Distribution Systems** 

**Power Quality Improvement in Transmission and Distribution Systems** 

36 An Update on Power Quality

[17] S.W.Mohod, S.M.Hatwar, M.V.Aware. "Wind Energy Generation Interfaced System with Power Quality and Grid Support" Journal of Advanced Materials Research,

Volumes 403 - 408, Tech Publication Swizerland, pp.2079-2086, Nov.2011.

**Chapter 3** 

© 2013 Zellagui and Chaghi, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2013 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution,

**Impact of Series FACTS Devices (GCSC, TCSC** 

The electricity supply industry is undergoing a profound transformation worldwide. Market forces, scarcer natural resources, and an ever-increasing demand for electricity are some of the drivers responsible for such unprecedented change. Against this background of rapid evolution, the expansion programs of many utilities are being thwarted by a variety of well-founded, environment, land-use, and regulatory pressures that prevent the licensing

The ability of the transmission system to transmit power becomes impaired by one or more

These limits define the maximum electrical power to be transmitted without causing damage to transmission lines and electrical equipment. In principle, limitations on power transfer can always be relieved by the addition of new transmission lines and generation

Alternatively, Flexible Alternating Current Transmission System (FACTS) controllers can enable the same objectives to be met with no major alterations to power system layout. FACTS are alternating current transmission systems incorporating power electronic-based and other static controllers to enhance controllability and increase power transfer capability.

and reproduction in any medium, provided the original work is properly cited.

and building of new transmission lines and electricity generating plants.

**and TCSR) on Distance Protection Setting** 

**Zones in 400 kV Transmission Line** 

Mohamed Zellagui and Abdelaziz Chaghi

Additional information is available at the end of the chapter

of the following steady state and dynamic limitations:

http://dx.doi.org/10.5772/54257

**1. Introduction** 


facilities.
