The multiple parallel inverters have more than one resonant frequency influenced by many factors, which tends to result in stability and power quality problems. This paper develops the multiple input multiple output model of the grid-connected inverters system using the closed-loop transfer function. The influence factors of resonant characteristics are analyzed with the developed model. The an...

Electronic loads are a family of power converters which can be used as a variable impedance load in different applications. This paper analyzes high efficiency zero-voltage electronic loads based on the quasi Z-source converter topology .The proposed topology operate as an ideal current source which enables the operation of the zero input voltage. It can achieve a high efficiency of more than 9...

This article presents a gray-box hierarchical instability source identification method of multiple-inverter-fed power systems, which enables stability analysis at system, component, and parameter levels sequentially. Impedance frequency responses all components are first obtained using scanning method. System impedance network model is then established by connecting these individual based on sy...

This paper addresses a cause for false tripping of photovoltaic inverters with anti-islanding protection based on impedance measurement with inter-harmonic injection. Earlier discussions about tripping problems happening when several devices are doing the measurement at the same time are supplemented with a problem caused by inrush transients of nearby devices. A series of experiments was condu...

In this paper Embedded based Z-source multilevel inverter (ZSMLI) is proposed. This work implements a five level cascaded H-bridge Z-source inverter by using embedded control. Switching devices are triggered using embedded controller. In this controller coding is described by using switching table. The presence of Z-source network couples inverter main circuit to the power source that providing...

Ripple control is the technique of controlling loads and other devices in the distribution grid by sending lowfrequency signals along the phase conductors or the neutral conductor. The magnitude of the signal is determined by the impedance of the network, loads, capacitor banks, filters and generators. An increase of the amount of electrical equipment connected to the grid, e.g. due to an incre...

Inverters are playing an increasingly important role in the electrical utility grid due to proliferation of renewable energy sources. Obtaining inverter models with accurate parameters is, therefore, essential for studies and design. In this paper, a methodology estimate output impedance residential grid-tied is proposed. The first verified through simulation. A sensitivity analysis conducted d...

In this paper, a small signal model based on droop controller is established for the self-synchronous voltage source parallel system. The influence of coefficient system stability analysed, and constraint conditions are given. Based analysis inverter, multi-machines control scheme inverter formulated. test platform built to carry out simulation experimental verification distributed line impedan...

As the size of the integrated circuits become smaller with higher speed of operation, the RLC interconnect effects have greater impact on signal propagation and signal integrity issue that is reflected in terms of noise or cross talk effects and giving rise to delay, ringing, glitches and overshoot, undershoot or false signaling problems etc. (figure-1, [7]). These definitely impose a great cha...