The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper provides optimal design of new topologies of the thyristor controlled reactors TCR used in static VAR compensators systems SVC with zero harmonic content. The paper discusses the principle of operation of the new topologies which depends on thyristor switched reactors TSR. The objective function and its constrains to get optimal design of such topologies are suggested to get proper reactive...
In order to stabilize the grid frequency in case of sudden loss of power generation, an injection of real power is needed. For this, a Static Var Compensator (SVC) can be combined with ultracapacitors, forming a grid frequency stabilizer. To prove the feasibility of this novel combination, the paper shows the realization of a 1 MW class test rig for full-size modules. Single modules are tested using...
Compensation of reactive power is one of the most important factors in power system operation. At present, advanced technologies like Flexible AC Transmission System (FACTS) and Flexible AC Distribution System (FACDS) are being introduced in the modern power system to improve power system stability as well as for stable compensation of reactive power. FACTS and FACDS controllers are widely adopted...
A new scheme for a 4-level Static Compensator (STATCOM) integrating two 2-Level converters, supplying / absorbing reactive power to / from the grid is proposed in this paper. Reduced component count and simpler layout of switches are the attractive features of the proposed topology over the existing diode clamped multilevel converter. Furthermore, less number of dc links and smaller dc link capacitor...
This paper deals with a unique combination of two inverters those may work as an active power filter (APF) or a STATCOM. Two inverters are switched at different frequencies. The low frequency inverter takes care of the reactive power demand of the system and makes the source current in phase with the voltage, while, the high frequency inverter mostly compensates for the harmonics. In the limiting...
This paper proposes a modification on the Hybrid Active Series Filter (HASF) creating a topology named Hybrid Active Var Compensator (HAVarC) suitable to manipulate, in continuous way, the displacement power factor or voltage regulation. The HAVarC is composed by a small rating Active Power Filter (APF) in series with a capacitor bank. The main objective of this topology is to control the reactive...
As a compromise between economy and good performance, this paper adopts the combined system using active power filter (APF) and static var compensator (SVC) to compensate reactive power and harmonic currents simultaneously. The SVC is constructed by fixed capacitor (FC) and thyristor controlled reactor (TCR), and the APF is constructed by a voltage source converter and its filter reactor. SVC acts...
Industrial plants are faced with stringent requirements by the utility to maintain near unity power factor. These plants have traditionally utilized switched capacitor banks as a cost-effective means for power factor correction. However, if there is a significant level of harmonics present in the current that is disturbing neighboring loads, then a separate unit for harmonic filtering is required...
This paper describes various problems in transmission and distribution systems and demonstrates the significance of reactive power management. Static VAR compensator and STATCOM principles of operation and power characteristics are described. The most common types of multilevel voltage source converters used in STATCOM applications are comparatively analyzed. The most promising topology of multi-level...
This paper draws on considerable real world experience relating to the challenges that can arise when connecting significant levels of wind generation to electricity networks. It also presents how these challenges can be effectively addressed using STATCOM reactive compensation, ensuring grid integrity is maintained while renewable energy goals are achieved. The primary focus is on the origins of...
Voltage source converters (VSC) have been widely utilized to provide instantaneous reactive power support to power systems, an application referred to as static synchronous compensators (StatCom). Integration of energy storage (ES) into a StatCom makes it possible for the StatCom to provide a certain amount of active power as well as reactive power support. The possible benefit of the additional active...
The custom power devices provide compensation capabilities to mitigate power quality problems like harmonics and reactive power. In this work a reactive power and dc-voltage control for the DSTATCOM is presented as part of a general control strategy. The controller is based in a multi-operating-point multio-bjective approach to adjust the power factor and the dc-voltage. The resulting strategy is...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.