EPE Association: EPE 1997 – 54: Dialogue Session DS4e: CONVERTER CONTROL, PFC/LINE HARMONICS

EPE 1997 – 54: Dialogue Session DS4e: CONVERTER CONTROL, PFC/LINE HARMONICS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 54: Dialogue Session DS4e: CONVERTER CONTROL, PFC/LINE HARMONICS

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   TO DESIGN AN OPTIMIZED PID CONTROLLER OF A SINGLE PHASE POWER FACTOR PRE-REGULATOR FOR AN ON-LINE UPS - GENETIC ALGORITHM APPROACH
By YU QIN; SHANSHAN DU [View]
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Abstract: An optimized digital PID controller for a single phase PFC converter is proposed in this paper. With the help of GENETIC ALGORITHM searching mechanism, the parameters of digital PID compensator are selected and optimized based on time domain specifications such as response time, percent of overshoot etc. for a step reference. The phase margin of the feedback loop is checked to ensure the stability of the system controlled by this optimized PID controller. The simulation shows excellent results in terms of response time and output overshoot for a step reference. This design approach provides an attractive alternative way to classical frequency domain methods to design a digital PID controller of the PFC converter. It can be easily extended to applications for all switching regulator control loop design.

   LOW-LEVEL IMPLEMENTATION OF HARMONIC ELIMINATION METHODS BASED ON STRUCTURAL PROPERTIES
By P. Bolognesi; G. Carrara; D. Casini; L. Taponecco [View]
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Abstract: To show the implementation advantages coming from the application of a new harmonic elimination methodology previously proposed, the conceptual design of a low-level digital controller, that can be implemented employing less than 600 equivalent NAND-NOR elementary logic gates, is presented in detail. The controller implements a simple method that acts on the line voltages of a standard 3-phase VS! inverter in such a way to obtain a symmetric tern of alternative output waveforms not containing the harmonic families 5 and 7. The controller permits also the regulation in real-time of the fundamental component frequency and amplitude. A prototype logic circuit based on the proposed controller scheme is then presented with some experimental tests results, to prove the actual feasibility of a cheap implementation employing simple TIL standard ICs . The circuit is able to generate the 3 branch command signals up to over I kHz of output frequency, with a global error for the fundamental component amplitude lower than 0.5% of the DC bus voltage on the entire useful range.

   MULTI CHOPPER FULL WAVE CONTROL INTERLACING TECHNIQUE MINIMISING FLICKER EFFECT
By N. Volochina; A. Piel; E. Destobbeleer; L. Protin [View]
[Download]

Abstract: Pairs of choppers delivering the same power are used in bottle forming industrial heating. Their full wave control avoids prohibited high frequency harmonic components but create a flicker effect. Applying amplitude modulation theory to the voltage drop across the line impedance gives a very good reduction of the flicker effect. The result is a heating system without any filter creating no prohibited harmonics.

   Minimizing the Line Interference of High-Power Low-Frequency Converters
By Oscar Apeldoorn; Trund Skullerud; Rik De Doncker; Tore Undeland [View]
[Download]

Abstract: High-Power Low-Frequency converters require an optimized control strategy in order to realize a high power factor and a low line interference at their input. Various control strategies which answer to these demands have already been developed. For a comparative study, the most important of these methods are simulated with Matlab-Simulink. New predictive methods which operate in the time and frequency domain were developed and are also presented· in this paper. The superiority of these methods also holds at distorted line-input voltages.

   High-Performance Sigle-Phase Power Factor Correction Converter Using New Pulse Integral Value-Related Modulation Scheme and Its Practical Evaluation
By Y. NISHIDA; E. HIRAKI; J. YASHITSUGU; M. NAKAOKA [View]
[Download]

Abstract: A high performance single-phase power factor correction converter using new modulation scheme based on pulse integral/average value is described. Since accurate local average value of the modulated current is detected and controlled in real time by means of analog oriented simple modulator, the PFC converter obtains a desirable input current under condition with a rippled dc current and varying modulation frequency. The theory of the proposed modulation scheme is described. Performance of a PFC converter using the new modulation scheme is practically evaluated and the validity of the theory is confirmed through experimental results. Further, applicability of the modulation scheme to the discontinuous or boundary current mode converters and (quasi) resonant converters are discussed.

EPE 1997 – 54: Dialogue Session DS4e: CONVERTER CONTROL, PFC/LINE HARMONICS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 54: Dialogue Session DS4e: CONVERTER CONTROL, PFC/LINE HARMONICS
	[return to parent folder]

	TO DESIGN AN OPTIMIZED PID CONTROLLER OF A SINGLE PHASE POWER FACTOR PRE-REGULATOR FOR AN ON-LINE UPS - GENETIC ALGORITHM APPROACH By YU QIN; SHANSHAN DU	[View] [Download]
Abstract: An optimized digital PID controller for a single phase PFC converter is proposed in this paper. With the help of GENETIC ALGORITHM searching mechanism, the parameters of digital PID compensator are selected and optimized based on time domain specifications such as response time, percent of overshoot etc. for a step reference. The phase margin of the feedback loop is checked to ensure the stability of the system controlled by this optimized PID controller. The simulation shows excellent results in terms of response time and output overshoot for a step reference. This design approach provides an attractive alternative way to classical frequency domain methods to design a digital PID controller of the PFC converter. It can be easily extended to applications for all switching regulator control loop design.

	LOW-LEVEL IMPLEMENTATION OF HARMONIC ELIMINATION METHODS BASED ON STRUCTURAL PROPERTIES By P. Bolognesi; G. Carrara; D. Casini; L. Taponecco	[View] [Download]
Abstract: To show the implementation advantages coming from the application of a new harmonic elimination methodology previously proposed, the conceptual design of a low-level digital controller, that can be implemented employing less than 600 equivalent NAND-NOR elementary logic gates, is presented in detail. The controller implements a simple method that acts on the line voltages of a standard 3-phase VS! inverter in such a way to obtain a symmetric tern of alternative output waveforms not containing the harmonic families 5 and 7. The controller permits also the regulation in real-time of the fundamental component frequency and amplitude. A prototype logic circuit based on the proposed controller scheme is then presented with some experimental tests results, to prove the actual feasibility of a cheap implementation employing simple TIL standard ICs . The circuit is able to generate the 3 branch command signals up to over I kHz of output frequency, with a global error for the fundamental component amplitude lower than 0.5% of the DC bus voltage on the entire useful range.

	MULTI CHOPPER FULL WAVE CONTROL INTERLACING TECHNIQUE MINIMISING FLICKER EFFECT By N. Volochina; A. Piel; E. Destobbeleer; L. Protin	[View] [Download]
Abstract: Pairs of choppers delivering the same power are used in bottle forming industrial heating. Their full wave control avoids prohibited high frequency harmonic components but create a flicker effect. Applying amplitude modulation theory to the voltage drop across the line impedance gives a very good reduction of the flicker effect. The result is a heating system without any filter creating no prohibited harmonics.

	Minimizing the Line Interference of High-Power Low-Frequency Converters By Oscar Apeldoorn; Trund Skullerud; Rik De Doncker; Tore Undeland	[View] [Download]
Abstract: High-Power Low-Frequency converters require an optimized control strategy in order to realize a high power factor and a low line interference at their input. Various control strategies which answer to these demands have already been developed. For a comparative study, the most important of these methods are simulated with Matlab-Simulink. New predictive methods which operate in the time and frequency domain were developed and are also presented· in this paper. The superiority of these methods also holds at distorted line-input voltages.

	High-Performance Sigle-Phase Power Factor Correction Converter Using New Pulse Integral Value-Related Modulation Scheme and Its Practical Evaluation By Y. NISHIDA; E. HIRAKI; J. YASHITSUGU; M. NAKAOKA	[View] [Download]
Abstract: A high performance single-phase power factor correction converter using new modulation scheme based on pulse integral/average value is described. Since accurate local average value of the modulated current is detected and controlled in real time by means of analog oriented simple modulator, the PFC converter obtains a desirable input current under condition with a rippled dc current and varying modulation frequency. The theory of the proposed modulation scheme is described. Performance of a PFC converter using the new modulation scheme is practically evaluated and the validity of the theory is confirmed through experimental results. Further, applicability of the modulation scheme to the discontinuous or boundary current mode converters and (quasi) resonant converters are discussed.