**Author details**

H.C. Leung and Dylan D.C. Lu *Department of Electrical and Information Engineering, The University of Sydney, NSW 2006, Australia* 

#### **8. References**

[1] Ewald Fuchs and Mohammad A. S. Masoum (2008). "Power Quality in Power Systems and Electrical Machines": pp 398-399

**Chapter 5** 

© 2013 Mokhtarpour et al., 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,

**Electromechanical Active Filter** 

Additional information is available at the end of the chapter

decreasing of power quality by themselves.

increase reliability and decrease losses.

http://dx.doi.org/10.5772/55009

**1. Introduction** 

**as a Novel Custom Power Device (CP)** 

Ahad Mokhtarpour, Heidarali Shayanfar and Mitra Sarhangzadeh

One of the serious problems in electrical power systems is the increase of electronic devices which are used by the industry as well as residences. These devices, which need highquality energy to work properly, at the same time, are the most responsible ones for

In the last decade, Distributed Generation systems (DGs) which use Clean Energy Sources (CESs) such as wind power, photo voltaic, fuel cells, and acid batteries have integrated at distribution networks increasingly. They can affect in stability, voltage regulation and

One of the most efficient systems to solve power quality problems is Unified Power Quality Conditioner (UPQC). It consists of a Parallel-Active Filter (PAF) and a Series-Active Filter (SAF) together with a common dc link [1-3]. This combination allows a simultaneous compensation for source side currents and delivered voltage to the load. In this way, operation of the UPQC isolates the utility from current quality problems of load and at the same time isolates the load from the voltage quality problems of utility. Nowadays, small synchronous generators, as DG source, which are installed near the load can be used for

Scope of this research is integration of UPQC and mentioned synchronous generators for power quality compensation and reliability increase. In this research small synchronous generator, which will be treated as an electromechanical active filter, not only can be used as another power source for load supply but also, can be used for the power quality compensation. Algorithm and mathematical relations for the control of small synchronous generator as an electromechanical active filter have been presented, too. Power quality compensation in sag, swell, unbalance, and harmonized conditions have been done by use

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

power quality of the network as an electric device connected to the power system.


**Chapter 5** 
