Solid-state switch for capacitors bank used in reactive power compensation

Ruszczyk, Adam; Koska, Krzysztof; Janisz, Konrad

doi:10.1109/isncc.2015.7174699

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…When controlling capacitive loads, special SSRs must be used, which have a complex control system, which requires a detailed theoretical, simulated and experimental study (which is not the subject of this paper). In some researches, analyzes were made, especially experimental ones, regarding the operation of SSRs [27,28]. The current work focuses on the practical verification of the PF regulation concept with classic PFCs for switching on/switching off CBs with a single three-phase SSR.…”

Section: Of 29mentioning

confidence: 99%

Low-Cost System with Transient Reduction for Automatic Power Factor Controller in Three-Phase Low-Voltage Installations

Popa,

Diniș

2024

Energies

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In power engineering, the importance of maintaining a high power factor in low-voltage electrical installations is known. In power substations for industry, the usual method of coupling is to use an automatic power factor controller which connects capacitors banks (with electromagnetic contactors). Sometimes, AC reactors are connected to the phases of the capacitors banks (to reduce transient phenomena and the deforming regime), depending on the desired value of the power factor. This paper presents an analysis (more focused on experimentation) of a low-cost system for automatic regulation of the power factor with a reduction in transients and an increase in the life of contactors (eliminating the electric arc during switching on), with capacitors banks for low-voltage three-phase installations that connect the capacitors banks by means of one three-phase solid-state relay (an expensive device for a quality device; one is used for all capacitors banks) and using several electromagnetic contactors. The automatic power factor adjustment system has a controller with a microprocessor with six outputs, controlled by the phase shift between the current (measured with a current transformer proportional to the current in a bar) and the phase voltage, which is part of a system of distribution bars (L1,2,3, N) from which electrical consumers (e.g., induction motors) are supplied. To reduce transients when connecting capacitors banks, a three-phase solid-state relay and two related electromagnetic contactors are used for each capacitors bank. The automatic power factor controller is connected to two low-capacity PLCs that control the logic of connecting the capacitors banks to reduce transients. By using the proposed regulation system, a cheaper control solution is obtained compared to the use of one solid-state relay for each capacitors banks, under the conditions in which the power factor adjustment is made as in the classic solution. If twelve capacitors banks are used, the proposed installation is 22.57% cheaper than the classical power factor regulation installation.

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Section: Of 29mentioning

confidence: 99%

Low-Cost System with Transient Reduction for Automatic Power Factor Controller in Three-Phase Low-Voltage Installations

Popa,

Diniș

2024

Energies

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“…However, EMR is less expensive than SSR and has a low conduct loss due to its excitation and mechanical movement [12]. SSR are mainly used in applications such as converters [13], distribution transformers [14] and power systems [15]. An alternative to the relay switch is the use of MOSFET transistors as the switching element.…”

Section: (B)-(c)mentioning

confidence: 99%

Exploitation of MOSFET‐based AC switches in capacitive impedance matching networks in inductive wireless power transfer systems

Alexandru

Zhu

2020

IET Power Electronics

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This study investigates the exploitation of MOSFET-based AC switches in capacitive impedance matching networks (IMNs) for inductive wireless power transfer (WPT). The IMN optimum capacitance has been chosen for a 200 kHz resonant frequency. The activation of the tuning capacitor on the tuning branch is achieved with the use of MOSFET AC switches in order for the WPT system to achieve maximum power transfer efficiency. The MOSFET AC switch is modelled as an internal parasitic resistor and capacitor connected in parallel. A WPT analytical model is developed to study the effects of the MOSFET's parasitic elements on the WPT system's efficiency and is verified experimentally. Various MOSFET switches and relays have been implemented as the IMN switching elements and compared when tested under the same conditions. It is concluded that MOSFET AC switches which have low on-resistances and small parasitic capacitances are desirable as they have a smaller impact on efficiency. Additionally, parasitic capacitances of MOSFET AC switches need careful consideration for different resonant frequencies as they can affect the overall IMN tuning capacitance especially when they are turned off. Comparing to commonly used relay switches, MOSFET-based AC switches have similar switching performance but are significantly smaller in size.

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Investigation and Reduction of Effects of Transient Signals for Switching Capacitor into a Power System by Using an Experimental Test Set

Yoomak

Pothisarn

Jettanasen

et al. 2017

Advances in Fuzzy Logic and Technology 2017

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Solid-state switch for capacitors bank used in reactive power compensation

Cited by 4 publications

References 2 publications

Low-Cost System with Transient Reduction for Automatic Power Factor Controller in Three-Phase Low-Voltage Installations

Low-Cost System with Transient Reduction for Automatic Power Factor Controller in Three-Phase Low-Voltage Installations

Exploitation of MOSFET‐based AC switches in capacitive impedance matching networks in inductive wireless power transfer systems

Investigation and Reduction of Effects of Transient Signals for Switching Capacitor into a Power System by Using an Experimental Test Set

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