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This paper proposes a new control method for a Unified Power Quality Conditioner (UPQC). This method is based on the load equivalent conductance approach, originally proposed by Fryze. It can be useful not only for compensation for nonactive current and for improving voltage quality, but it also allows one to perform some unconventional functions. This control method can be performed by extending the orthodox notion of ‘static’ load equivalent conductance into a time-variable signal. It may be used to characterize energy changes in the whole UPQC-and-load circuitry. The UPQC can regulate energy flow between all sources and loads being under compensation. They may be located as well for UPQC’s AC-side as DC-side. System works properly even if they switch their activity to work either as loads or generators. The UPQC can operate also as a buffer, which can store/share the in-load generated energy amongst other loads, or it can transmit this energy to the source. Therefore, in addition to performing the UPQC’s conventional compensation tasks, it can also serve as a local energy distribution center.
Andrzej Szromba. The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load. Energies 2020, 13, 6298 .
AMA StyleAndrzej Szromba. The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load. Energies. 2020; 13 (23):6298.
Chicago/Turabian StyleAndrzej Szromba. 2020. "The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load." Energies 13, no. 23: 6298.
Andrzej Szromba; Wojciech Mysinski. Voltage-source-inverter-based conductance-signal-controlled shunt active power filter. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) 2017, 1 .
AMA StyleAndrzej Szromba, Wojciech Mysinski. Voltage-source-inverter-based conductance-signal-controlled shunt active power filter. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe). 2017; ():1.
Chicago/Turabian StyleAndrzej Szromba; Wojciech Mysinski. 2017. "Voltage-source-inverter-based conductance-signal-controlled shunt active power filter." 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) , no. : 1.
The purpose of this study is to find a control method for three-phase four-wire shunt active power filters, which uses a load-equivalent conductance for obtaining a reference signal for compensating non-active current. Changes of energy stored in an active filter’s reactance elements are monitored to find the active component of the load current. It is then used as a current reference to be realised as a supply source current. Computer simulation methods were used to verify the presented control method. To calculate the reference signal for the active filter action, it is enough to measure the active filter’s DC-side capacitors’ voltages. It has been proved that P regulators are sufficient to realise compensating current and to stabilise active filter capacitors’ voltages. The supply source-neutral conductor current can be zeroed even for nonlinear and unbalanced load-generating DC-component in its neutral conductor. In addition, the active filter can buffer load-active power changes and act simultaneously as a local energy accumulator. This paper provides an alternative approach to address the problem of the three-phase four-wire shunt active power filter control methods.
Andrzej Szromba. Three-phase four-wire shunt active power filter working simultaneously as energy conditioner. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 2017, 36, 702 -715.
AMA StyleAndrzej Szromba. Three-phase four-wire shunt active power filter working simultaneously as energy conditioner. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 2017; 36 (3):702-715.
Chicago/Turabian StyleAndrzej Szromba. 2017. "Three-phase four-wire shunt active power filter working simultaneously as energy conditioner." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 3: 702-715.
Shunt active power filters (SAPF) can be controlled using conductance signal related to the load active power. The distinctive feature of the considered control method is that certain changes of energy stored in the active filter's reactance elements are utilized as the source of information concerning the load power and then the reference signal for the SAPF action. Particularly difficult SAPF operating conditions can occur in systems with asymmetrical and distorted supply voltages. The paper deals with these problems.
Andrzej Szromba. Shunt active power filter control using signal of load equivalent conductance in asymmetrical three-phase systems under nonsinusoidal conditions. 2016 International Conference on Signals and Electronic Systems (ICSES) 2016, 161 -166.
AMA StyleAndrzej Szromba. Shunt active power filter control using signal of load equivalent conductance in asymmetrical three-phase systems under nonsinusoidal conditions. 2016 International Conference on Signals and Electronic Systems (ICSES). 2016; ():161-166.
Chicago/Turabian StyleAndrzej Szromba. 2016. "Shunt active power filter control using signal of load equivalent conductance in asymmetrical three-phase systems under nonsinusoidal conditions." 2016 International Conference on Signals and Electronic Systems (ICSES) , no. : 161-166.
This paper presents a load equivalent conductance based control method for a shunt active power filter. The principle of energy balance in the circuit, which means between supplying source - active filter - load, is used to obtain the control formula. The natural inertia of the active filter action is exploited, so no PI regulators are needed. The active filter can compensate for non-active current and, additionally, can stabilise the supplying source active power. In a case of generating loads energy harvesting is possible. The presented method is useful as well for voltage-source as current-source inverter based active filters, and for DC system as well as for AC single- or three-phase one.
Andrzej Szromba. Conductance-controlled global-compensation-type shunt active power filter. Archives of Electrical Engineering 2015, 64, 259 -275.
AMA StyleAndrzej Szromba. Conductance-controlled global-compensation-type shunt active power filter. Archives of Electrical Engineering. 2015; 64 (2):259-275.
Chicago/Turabian StyleAndrzej Szromba. 2015. "Conductance-controlled global-compensation-type shunt active power filter." Archives of Electrical Engineering 64, no. 2: 259-275.
The considered shunt active power filter can be controlled not only to compensate non-active current in the supply source, but additionally to optimize energy flow between the source and the load. In such a case the filter shapes the source current to be active and simultaneously regulates its magnitude. The presented filter/buffer can operate properly even when the load contains AC or DC variable energy source of any characteristic. The device can optimize energy flow for a single load, but also for a group of loads as well. The distinctive feature of the employed control method of the filter/buffer is that certain changes of energy stored in the device are utilized as the source of information concerning the active current of the load. This control method is very flexible and can be implemented to nearly all structures of active filters, for DC, single- and multiphase circuits.
Andrzej Szromba. Shunt power electronic buffer as active filter and energy flow controller. Archives of Electrical Engineering 2013, 62, 55 -75.
AMA StyleAndrzej Szromba. Shunt power electronic buffer as active filter and energy flow controller. Archives of Electrical Engineering. 2013; 62 (1):55-75.
Chicago/Turabian StyleAndrzej Szromba. 2013. "Shunt power electronic buffer as active filter and energy flow controller." Archives of Electrical Engineering 62, no. 1: 55-75.
Energy controlled shunt active power filters
Andrzej Szromba. Energy controlled shunt active power filters. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 2007, 26, 1142 -1160.
AMA StyleAndrzej Szromba. Energy controlled shunt active power filters. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 2007; 26 (4):1142-1160.
Chicago/Turabian StyleAndrzej Szromba. 2007. "Energy controlled shunt active power filters." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 26, no. 4: 1142-1160.
Andrzej Szromba. Synchronized active power filter. IEEE Compatibility in Power Electronics, 2005. 2005, 148 -165.
AMA StyleAndrzej Szromba. Synchronized active power filter. IEEE Compatibility in Power Electronics, 2005.. 2005; ():148-165.
Chicago/Turabian StyleAndrzej Szromba. 2005. "Synchronized active power filter." IEEE Compatibility in Power Electronics, 2005. , no. : 148-165.
A shunt active power filter: development of properties
Andrzej Szromba. A shunt active power filter: development of properties. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 2004, 23, 1146 -1162.
AMA StyleAndrzej Szromba. A shunt active power filter: development of properties. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 2004; 23 (4):1146-1162.
Chicago/Turabian StyleAndrzej Szromba. 2004. "A shunt active power filter: development of properties." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 23, no. 4: 1146-1162.