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The objective of this paper is to underline the potential as well as the control advantages of the modular-multilevel high-voltage-direct-current converter (MMC-HVDC). Firstly, a brief overview of the MMC-HVDC technology is given and the detailed equivalent model for this converter is presented. Secondly, a heavy focus is applied to the control of a converter substation. Thirdly, a Matlab simulation...
Integrating high proportions of residential photovoltaics (PV) in the distribution grid may potentially disrupt the nominal circuit operating conditions and result in power quality issues. The maximum PV capacity that can be integrated without incurring any grid impacts is referred to as the PV hosting capacity of the grid. Integrating more PV than the hosting capacity mandates grid upgrades and additional...
This paper presents a new mixed-integer linear programming (MILP) model to solve the multistage long-term expansion planning problem of electrical distribution systems (EDSs) considering the following alternatives: increasing the capacity of existing substations, constructing new substations, allocating capacitor banks and/or voltage regulators, constructing and/or reinforcing circuits, and modifying,...
In this contribution, the investigation on the failures of 115-kV capacitor banks during switching in Chiang Mai 3 substation is presented. The switching transient is caused by energizing an isolated bank and back-to-back switching. Close time of circuit breaker for energizing capacitor bank, system loads, and power factors are varied in the simulations by PSCAD/EMTDC program to determine the causes...
Supplying every customer a voltage that is within ANSI standards is a basic requirement of a distribution feeder. As the load on a feeder varies the voltage supplied to every customer will also vary. Some means of regulating the customer voltages must be implemented. Switched shunt capacitors and step voltage regulators are the two most common means used for regulating voltages. This paper addresses...
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