<p>Planning of high voltage direct current (HVDC) grids requires inclusion reliability assessment alternatives under study. This paper proposes a methodology to evaluate the adequacy source converter/VSC-HVDC networks. The analyses performance system using N-1 and N-2 contingencies in order detect weaknesses DC network evaluates two types remedial actions keep entire acceptable operating ...

Any problem with voltage in a power network is undesirable as it aggravates the quality of the power. Power electronic devices such as Voltage Source Converter (VSC) based Static Synchronous Compensator (STATCOM) etc. can be used to mitigate the voltage problems in the distribution system. The voltage problems dealt with in this paper are to show how to mitigate unbalanced voltage sags and volt...

This paper investigates the operation of a currentcontrolled Voltage Source Converter (VSC) under weakgrid conditions caused by large grid impedance. Threedifferent current controller structures are investigated; theconventional decoupled PI-controller in the synchronouslyrotating reference frame, Proportional Resonant (PR)controllers in the stationary reference frame, a...

We proposed voltage-sourced converter (VSC) with Pulse-width modulation (PWM) provides a faster control that is required for flicker mitigation purpose. The voltage regulation in the distribution feeder is improved by installing a shunt compensator. The proposed DSTATCOM is modeled and its performance is simulated and verified for power factor correction and voltage regulation along with neutra...

Most of the wind power plants currently installed at North Sea are near to shore connected with the onshore grid through AC cable. AC transmission technology is proven and reliable, but there will be a need to switch from AC to DC transmission since large number of offshore power plants at longer distance to shore are expected to be installed by the end of 2020. Furthermore, to enhance the inte...

This paper investigates the relationship between frequency support by voltage-source converter based high-voltage direct current (VSC-HVDC) systems and deloaded wind power operation considering stability constraints. The is incorporated as additional constraints in optimal flow (OPF) analysis. reserve capacity of plants should be provided for support, which requires output suppression during st...

With the development and advancement of power electronics devices in recent years, changes in the scenario in the field of controlling and handling the power quality issues have been very effective. FACTS devices are the outstanding approach. In this manuscript,we choose one such FACTS device known as STATCOM, a powerful shunt controller, for discussing its impact and depth how to tackle the po...

AbstractThe dynamic voltage restorer (DVR) is a series connected device for mitigating voltage sag/This paper presents with feed forward pre-sag/swell voltage control method to regulate the output voltage of pulse width modulated (PWM) voltage source converter (VSC). The proposed controller maintains a constant load voltage under the multiple balanced/unbalanced dynamic PQ disturbances. The pro...

Back-to-back static synchronous compensator (BtBSTATCOM) consists of two back-to-back voltage-source converters (VSC) with a common DC link in a substation. This configuration extends the capabilities of conventional STATCOM that bidirectional active power transfer from one bus to another is possible. In this paper, VSCs are designed in quasi multi-pulse form in which GTOs are triggered only on...

To improve both the stability and disturbance suppression ability of single-phase grid-connected inverters through LCL filters, this paper proposes an inverter output impedance enhancing control mechanism. The mechanism employs a virtual node-voltage feedforward to ensure sufficient passivity high amplitude over wide frequency range interest. proposed is realized combination low-voltage bidirec...