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An electrical power system network consists of number of buses, individual elements coupled together and to form a big and complex network which have the capable of generation, transmission and distribution of electrical energy over large environmental areas. In order to satisfy the increasing power demand, the power system network is developing each and every day. The power demand is reduced either...
The electric railroads have expanded and have been improved by power electronics technologies. This paper introduces power electronics applications in traction power supply systems in Japan. The three-phase 25-MVA STATCOMs (STATic synchronous COMpensator) suppress fluctuations of the system voltage in an independent power system of a metropolitan rail network. The single-phase STATCOMs called as RPCs...
This work presents a comparative study between the traditional method based on PI controller and an advanced smooth Sliding Mode Control (SMC) applied to a voltage source inverter based STATCOM. Both of the systems are used to regulate the reactive power by controlling the grid voltage at the Point of Common Coupling (PCC). A smooth saturation function is used to minimize the chattering generated...
This paper is concerned with the use of medium-voltage power electronics in providing active compensation to distribution networks. The primary purpose of using active compensation is to allow for network growth in the form of distributed generation or customer demand increases. With continuing growth, network thermal and voltage constraints would eventually be violated at some point, even with the...
In mining power systems, voltage sag caused by the starting currents of direct-on-line asynchronous machines can affect adjacent plant. This paper utilises a STATCOM installed on the terminals of an asynchronous machine, implementing a voltage support algorithm, to correct voltage sag. Experimental results are presented from a three phase, low voltage system showing the local correction of voltage...
Various studies have been devoted to modulation and control of power electronic systems. Modeling of such a system is often required for control purposes. One modeling approach is the standard state space average model (SSSAM), which considers switching behaviors of the converters. The developed SSSAM of the static compensators (STATCOM) describes a non-affine model that is hardly controllable. A...
Towards the reactive compensation feature of distribution network and integral substation, this paper proposed an integration structure of distribution transformer and STATCOM (DT-STATCOM). It use the surplus capacity of transformer to compensate the reactive power; by setting the connect voltage flexible, it extended the switching devices selection; the integration structure reduce the volume and...
Towards the reactive compensation feature of distribution network and integral substation, this paper proposed an integration structure of distribution transformer and STATCOM (DT-STATCOM). It use the surplus capacity of transformer to compensate the reactive power; by setting the connect voltage flexible, it extended the switching devices selection; the integration structure reduce the volume and...
This paper presents the fourth part of the Bibliography of FACTS technology for 2009 and 2010. It provides a listing of various journal and conference papers in this area.
The use of powerful modular multilevel converters (MMC) for FACTS applications has resulted in the development of new STATCOM products, which have been already applied in a number of projects, due to its superior characteristics and competitive costs. The MMC simplifies equipment design, improves response time and reduces losses. This paper introduces a STATCOM of this type, discussing the characteristics...
Most marine applications, from ships to platforms, are increasingly using high power electronics for motor drives and power conversion and power distribution. In this digital age control/protection technology is advancing rapidly and substantial improvements can be attained through cost effective upgrades. with potential benefits from upgrading and adding new features of control/protection from time...
In this paper a new method has been proposed to decide optimal placement and best sizing of static synchronous compensator (STATCOM). Seeking the best place is performed using the sensitivity analysis and sizing of STATCOM is managed using the genetic algorithm. The average model can account for the high-frequency effects and power electronic losses, and more accurately predict the active and reactive...
Control architecture for high-power electronics from power semiconductor device levels to the power system level is defined and characterized. Coverage includes the application of power electronics in the areas of Power Quality/Custom Power, Flexible AC Transmission Systems (FACTS), High Voltage DC Transmission (HVDC), Distributed Generation, Energy Storage applications, etc. with a power range from...
Most marine applications, from ships to drilling platforms, are increasingly using power electronics for motor drives and HVDC power conversion for shore to platform transmission. IEEE Working group i8 is well along in developing a standard for control/protection architecture for power electronics converters. In this digital age control/protection technology is advancing rapidly and substantial improvements...
Phase-Locked-Loop (PLL) plays important role in grid connected power electronics system. A good PLL system can detect the grid phase angle and frequency fast and accurately, and additionally it can extract the positive sequence exactly. In real applications, source signal (voltage or current) usually includes harmonic distortion, unbalanced components. Conventional PLL strategy cannot solve the unbalanced...
This paper presents a segmented PI controller for an 84-pulse voltage source converter (VSC), subjected to several common disturbances in voltage and load levels. The corresponding voltage total harmonic distortion (THD) is compatible with special applications' requirements which include hospitals and airports (IEEE Std 519-1992), while the quantity of employed switches is reduced in comparison to...
FACTS controllers and HVDC links are high power electronics-based structures which have shown its strength in improving the operation and control of nowadays electrical networks worldwide. Alongside the many benefits they provide, there are also collateral effects on the grid as consequence of dynamically deviating localized network parameters, which affects the protection system for instance. This...
The world's largest 450MVA STATCOM using GCT(Gate Commutated Turn-off) thyristor is designed for installation plan at Toshin substation of Chubu Electric Power Co. in Japan. The main purposes of the STATCOM are improvement of the power system stability and suppression of AC over-voltage occurred after route outage fault at heavy load condition. This paper describes the determination procedure of specification...
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