This paper presents a line commutated converter (LCC) based multi-terminal HVDC transmission (MTDC) system feeding very weak AC networks with hybrid reactive power compensators (RPC’s) at the inverter AC side. The hybrid compensator is accomplished by the equal mixing of any two of the following compensators: synchronous compensator (SC); static var compensator (SVC); static synchronous compens...

This paper presents an integral control strategy which integrates data from phase measurement units to damp inter-area oscillations. The proposed decentralized model predictive control method has one control unit for each controllable device (Generators, FACTS, HVDC) and coordinates their behavior after a fault. Each unit is designed by applying a systematic controller synthesis. The decentrali...

Hybrid HVDC systems have been proposed as an alternative for nominal VSC-Based offshore applications. consist of power station composed the connection high-power diode rectifiers in series with a fractional VSC-HVDC. This hybrid configuration allows large transfer from sites, added robustness, simplicity and efficiency uncontrolled rectifiers. In this research, robust fast-acting controller, Tw...

This research work proposes a multi-input multi-output (MIMO) online adaptive feedback linearization NeuroFuzzy control (AFLNFC) scheme to improve the damping of low frequency oscillations (LFOs) in an AC/DC power system. Optimized NeuroFuzzy identification architecture online captures the oscillatory dynamics of the power system through wide area measurement system (WAMS)-based measured speed ...

Conventional Voltage Source Converters (VSC) cannot interrupt DC fault currents and DC circuit breakers are not yet commercially available for HVDC power ratings. Thus, the protection of VSC-HVDC systems is still an obstacle for the development of this technology. The features of VSC-HVDC systems make them suitable for implementing HVDC grids. Nevertheless, HVDC grids are more complex than poin...

In this paper, the interconnection of a strong AC system to a weak AC system by using a Voltage Source Converter (VSC) based High Voltage DC (HVDC) transmission system is investigated. In this work, the weak AC system considered is an island system comprised of synchronous generators and passive load. Analysis is carried out for UPF load and inductive load. The ac filter requirement to achieve ...

With Europe dedicated to limiting climate change and greenhouse gas emissions, large shares of Renewable Energy Sources (RES) are being integrated in the national grids, phasing out conventional generation. The new challenges arising from energy transition will require a better coordination between neighboring system operators maintain security. To this end, paper studies benefit exchanging pri...

This paper is based on the EL mathematical model of the MMC synchronous rotating coordinate system, derived the MMC passive control law, the inner ring current passive controller is designed and the AC voltage controller is set. In order to restrain the negative sequence current caused by the network voltage unbalance or asymmetric AC system fault, the positive and negative sequence of independ...

In this paper we propose a controller architecture for High Voltage Direct Current (HVDC) based on our adaptive network called Fuzzified Input Perceptron (FIP). In FIP, the THEN part membership function and defuzzification steps are combined together, as a result the overall structure becomes simple. Moreover the initial setting of FIP’s parameters can be selected based on expert knowledge. FIP...