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The increase in penetration levels of distributed generators like PV and Wind in a distribution system makes the IEEE 519 standard to be a vital aspect towards power quality. The network resonance has been described by IEEE 519 as a major contributor towards the harmonic distortion. Non-linear loads such as transformers, machines, silicon-controlled rectifiers (SCRs), solid state devices, power transistors,...
A 13-bit 160MS/s hybrid ADC in 65 nm CMOS is presented in this paper. By combining the pipelined, flash and SAR architectures, a hybrid ADC architecture is proposed to improve the power efficiency. An input offset storage technique of dynamic comparator is proposed to increase the conversion linearity. A reference voltage buffer with the charge compensation is proposed to save power and reduce the...
This paper proposes a power-efficient capacitor-array-based digital-to-time converter (DTC) using a constant-slope approach. Fringe-capacitor-based digital-to-analog converter (C-DAC) array is used to regulate starting supply voltage of the constant slope fed to a fixed threshold comparator. The proposed DTC consumes only 15 μW from a 1V supply, while achieving fine resolution of 103 fs when running...
The motivation of this research arises from the design of a low scale electric generation project, where a poly-phase generator is designed to harvest the energy from static exercise machines. This article presents the development of a static power electronics scheme based on a rectifier, dc-dc converter and a voltage source inverter (VSI) that enables the efficient energy management between a variable...
An open-loop and closed-loop operating boost-power-stage converter with relatively low damping factor exhibit resonant behavior in transient conditions. Such an undamped transient characteristic introduces overshoot to the control-to-output-variable transfer function, which is also visible in the inductor current transient behavior. Therefore, due to the either too large duty ratio or voltage-reference...
This paper proposes a new high-voltage Pulse Generator (PG), fed from low voltage dc supply Vs. This input supply voltage is utilized to charge two arms of N series-connected modular multilevel converter sub-module capacitors sequentially through a resistive-inductive branch, such that each arm is charged to NVS. With a step-up nano-crystalline transformer of n turns ratio, the proposed PG is able...
Energy harvesting is an attractive option to generate power for different low power stand-alone electronic devices. Dielectric Elastomer Generator (DEG) is a special variable capacitor generator which, by virtue of its variable capacitance property, can convert vibrational mechanical energy to electrical energy. Hence the DEGs can be used as a means to harvest electrical energy from various environmental...
The paper deals with a high efficiency boost rectifier for high rotational speed Gen-Set applications. It is tailored around a permanent magnet synchronous generator (PMSG) featuring an open end winding configuration. According to such a configuration the generator stator windings are connected on one side to a three level T-type unidirectional rectifier, and on the other side, to an auxiliary two-level...
In this paper, a non-overlap clock (NVC) generator for high accuracy fully differential Switched Capacitor (SC) readout circuit which is applied in Micro-Electro Mechanical System (MEMS) differential sensor is proposed. Compared with traditional generator, generating a set of non-overlap clock, this circuit generates a new set of clocks which are being nested inside the primary non-overlap clocks,...
With the vigorous development of new energy sources, wind power generation technology has been developed rapidly. Due to the reverse distribution of wind energy resources and load centers, large-scale wind power transmission is inevitable. Using series capacitor compensation technology is an effective measure to complete large-scale wind power transmission, but may induce sub-synchronous oscillation...
This paper deals with design, simulations and comparison of various bipolar Marx topologies. Output voltage pulse specifications are 10 kV, % voltage droop − 10%, PRF − 1kHz and pulse width of 5μsec. The features of inductive charging and charging through input switch is analyzed. Bipolar Marx generator with six switches, five switches and four switch topologies are designed and simulated. These solid-state...
The purpose of the work is to develop and produce a new generator of electric overstress (EOS) pulses with extended characteristics and increased technical and monitoring capabilities. The goals and the purposes of creation of the generator with the declared parameters are specified. This article shows the main methods and ways of obtaining ultra-short high voltage pulses. The problems encountered...
A switched-capacitor circuit is proposed for the generation of noise resembling the typical noise spectral density of MOS devices. The circuit is based on the combination of two chaotic maps, one generating 1/f noise (hopping map) and the other generating white noise (Bernoulli map). Through a programmable weighted adder stage, the contribution of each map can be controlled and, thereby, the position...
The voltage balancing of the dc-link capacitors in an electric drive system with five-level neutral-point-clamped converters is investigated in this paper. A properly modified space-vector-modulation technique is utilized in combination with a multilevel dc/dc converter for controlling the capacitor voltages. An advanced algorithm has been developed for reducing the losses of the electric drive system...
This paper presents a concept for a compact high voltage generator based on a highly integrated power chain switching at frequencies above 500 kHz. The high frequency operation in combination with the high integration approach enable a reduction of volume and weight of HY-generators used in industrial or medical applications.
This paper examines resonant characteristics of the transmission line compensated with the Static Synchronous Series Compensator. Frequency-domain characteristics of the line impedance are studied to evaluate whether the SSSC can cause electrical resonance in the line, hence the potential to excite subsynchronous resonance (SSR) in neighboring turbine-generator plants. Detailed studies are performed...
The problems associated with the harmonics needs more attention as more number of distributed generators like PV and wind are integrated into a distribution system. Although the integration presents a lot of benefits, satisfying the needs of local load requirements by reducing the line losses and facilitating congestion management, the problems of power quality that impact the distribution system...
With the push towards Medium Voltage DC (MVDC) based shipboard electrical distribution systems, the power converter(s) between Medium Voltage AC generators and common MVDC buses must handle more power than any other electrical power conversion component in the ship. The Modular Multi-Level Converter (MMLC) is a compelling topology for this function because of its modular structure and the potential...
This paper investigates a class of electrical generators based on capacitors and diodes, with two capacitors being variable. Their main characteristics are a symmetrical structure and that they produce two outputs with the same polarity. The simplest version is analyzed in more detail, although in an approximate way, and generalizations of it are obtained, identified with a particular form of two-phase...
This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm...
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