High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller gains, it is shown to stabilize the MTDC system. The controller is shown to always keep the voltages close...

Wind is one of the most abundant renewable sources of energy in nature. Wind energy can be harnessed by a wind energy conversion system (WECS) composed of a wind turbine, an electric generator, a power electronic converter and the corresponding control system. The most advanced generator type is perhaps the permanent magnet synchronous generator (PMSG). As far as microgrid is concerned the load...

In order to solve the stability problems and increase the PSRR performance of the Low Drop-out Voltage (LDO) a novel technique is presented. The main purpose of this work was to obtain a high PSRR, high power efficiency with a low load current. To achieve this, several techniques such as Nested Miller Compensation (NMC), Pole-Zero Tracking Frequency Compensation (PZTFC) and Single Miller Compen...

A procedure for the design and tuning of two control loops of a High Voltage DC system is presented. The controlled variables are direct current on the rectifier side and direct voltage on the inverter side. The dynamics of both control loops interact with each other and are determined by the overall properties of the combined AC/DC system. Constraints on the information available for feedback ...

Low-frequency oscillations are a primary issue for integrating renewable source into the grid. The objective of this study was to find sensitive parameters that cause low-frequency and design Twin Delayed Deep Deterministic Policy Gradient (TD3) agent controller damp without requiring an accurate system model. In work, Q-learning (QL)-based model-free wind speed DFIG designed on rotor-side conv...

This paper develops a new distributed secondary cooperative control scheme to coordinate distributed generators (DGs) in islanded microgrids (MGs). A finite time frequency regulation strategy containing a consensus-based distributed active power regulator is presented, which can not only guarantee the active power sharing but also enable all DGs’ frequencies to converge to the reference value w...

The fundamental concept of control for a three-legged IGBT-based voltage source regulator-based stabiliser was thoroughly discussed in this paper. proposed technique's effectiveness and efficiency two-machine based model is demonstrated by comparative analysis grid integrated hybrid system. solar wind system produces 400 volts voltage. A the various stabilisation algorithms currently underway. ...

The paper proposed an approach to study the power system voltage coordinated control using Linear Temporal Logic (LTL). First, the hybrid Automata model for power system voltage control was given, and a hierarchical coordinated voltage control framework was described in detail. In the hierarchical control structure, the high layer is the coordinated layer for global voltage control, and the low...

This paper proposes a control methodology for compensation of grid voltage unbalances using a new scheme of doubly fed induction generator (DFIG) based on a series grid side converter (SGSC), the seriesDFIG scheme. In such DFIG scheme, the grid side converter (GSC), which is usually connected in parallel to the machine stator, is replaced by the SGSC, connected in series with the machine stator...

Voltage Source Converter (VSC) based HVDC is the most recent HVDC technology with extruded DC cables in small and medium power transmission. VSC-HVDC converters include Insulated Gate Bipolar Transistors (IGBT’S) and operated with high frequency Pulse Width Modulation (PWM) in order to get high speed control of both active and reactive power. With VSC-HVDC there is an addition degree of freedom...