This paper presents the survey of the smart grid technologies, including the background, motivation and practical applications. The driving forces for the smart grid technologies are presented, including the blackout, global energy crisis and environmental protection requirement. The key technology issues for building the smart grid are discussed. The crucial elements of the smart grid and thei...

This paper deals with a three-phase unified power quality conditioner (UPQC), with a combination of shunt active power filter and series active power filter is used to eliminate supply current harmonics, compensate reactive power, voltage sag and voltage swell compensation on distribution network. The performance of the active power filter mainly depends on control strategy used to generate ref...

This paper presents a multi-objective control strategy for power quality issues. With increasing applications of nonlinear and semi-conductor devices in distribution systems and industries, power-quality (PQ) problems, such as harmonics, neutral current elimination, voltage sag, voltage swell reactive power has become an unavoidable issue. Due to the changing trends and restructuring of power s...

Any electrical power system consists of wide range of electrical, electronic and power electronic equipment in commercial and industrial applications. Since most of the electronic equipment is nonlinear in nature these will induce harmonics in the system, which affect the sensitive loads to be fed from the system. One among the many compensating devices is Unified Power Quality Conditioner (UPQ...

Wind power generation is grasping more attention nowadays because it offers the benefits of reduced cost, increased efficiency, less pollution and so on. But the known disadvantage is that the integration of wind farm with grid leads to many power quality problems such as voltage sag, swell, unbalance, harmonics, flickers etc. This paper concentrates mainly on diminution of source voltage sag a...

In a modern power system, the unified quality conditioner (UPQC) is considered to be most effective device for mitigating problems. The use of dynamic voltage restorer (DVR) active-reactive power-sharing reduces loading on UPQC in all operating conditions, leading better system efficiency and reliability. VA DVC can controlled by maintaining proper angle between load source voltage. this paper,...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract This paper presents two different control strategies applied to Unified Power Quality Conditioner (UPQC) to improve power quality in a three-phase, four-wire distribution system. The two control techniques are Unit Vector Template Generation (UVTG)...

Unified power quality conditioner (UPQC) with energy storage is commonly based on conventional capacity configuration strategy angle control. It has problems such as phase jumping before and after compensation. DC-link cannot continuously emit active externally. Therefore, this paper presents the compensation of full load voltage magnitude in UPQC. The topology UPQC integrated a series filter (...

This paper presents a control strategy for a Unified Power Quality Conditioner. This control strategy is used in three-phase three-wire systems. The UPQC device combines a shunt-active filter together with a series-active filter in a backto-back configuration, to simultaneously compensate the supply voltage and the load current. Previous works presented a control strategy for shunt-active filte...