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A crude oil production and shipping terminal was built and expanded over time such that the facility was powered by three isolated power systems. These separate plants have since been interconnected to permit the sharing of generation reserves. Initially, the interconnected system was supervised by a power management system (PMS) that relied on isochronous operation of one power plant for frequency...
In this paper the switched reluctance generator (SRG) is explored considering the improvement of its efficiency. This machine generates a DC power that is directly related to input driving parameters. Simulation results are presented bringing a case study of parametric regression to track the best efficiency for any input parameters: excitation voltage and turn off angle. A method known as parametric...
Since the wave energy power generation has a low voltage output and poor stability in low speed, the scheme of a compensation power generation scheme of two bilateral asymmetric linear switched reluctance generators (BALSRG) is proposed. The mathematic model of the BALSRG is derived and machine characteristics are investigated. Two control methods are discussed and compared. Experiment results demonstrate...
Since the wave energy power generation has a low voltage output and poor stability in low speed, the scheme of a compensation power generation scheme of two bilateral asymmetric linear switched reluctance generators (BALSRG) is proposed. The mathematic model of the BALSRG is derived and machine characteristics are investigated. Two control methods are discussed and compared. Experiment results demonstrate...
A hybrid model of the electrical power generation system that combines the computer model of the power scheme with the real control system is described. The results of research of the electromagnetic and electromechanical processes for main working regimes are presented.
Islanded DC microgrid architecture and control have become popular recently. One of the main control architectures is the DC bus voltage following type, where a main generator controls the DC bus voltage and the others follow the bus voltage and the power commands. Conventionally, the power regulation in the following generators is often employed with the droop control method. The main problem of...
With high-penetration levels of renewable generating sources being integrated into the existing electric power grid, conventional generators are being replaced and grid inertial response is deteriorating. This technical challenge is more severe with photovoltaic (PV) generation than with wind generation because PV generation systems cannot provide inertial response unless special countermeasures are...
The provision of reactive power/energy for the purposes of voltage control of the transmission system is, pursuant to the Swiss Electricity Supply Act of 2007, part of the ancillary services market. In line with it, Swissgrid, the Swiss TSO, developed a concept for the coordinated voltage control of the 220/380-kV transmission system that enables, along with transmission connected power plants, the...
This paper proposes a control scheme of the low voltage ride through (LVRT) in wind turbines (WTs). The LVRT requirement which is included in the grid-code regulates WTs to maintain their operation and supply reactive power during grid fault. If the systems do not have solutions for the LVRT control, the WTs cannot maintain operation under LVRT condition or the faults can be generated in the system...
This paper presents an investigation of voltage and frequency based BESS (battery energy storage system) controller used in micro grid for analyzing the optimum capability of plant. Micro grid is formed by using three hydro power plants feeding three phase four wire load. The proposed controller is used for load balancing, harmonic elimination, load leveling and neutral current compensation. The proposed...
Most of the Maximum Power Point Tracking(MPPT) controls for a wind generation system are based on the unknown wind speed. In these methods, a Power Signal Feedback(PSF) method, an optimal Tip Speed Ratio(TSR) method and a Perturbation & Observation(P&O) method are used. However, in this paper, an estimating technique of the wind speed using the efficiency curve of the blade is proposed. By...
This paper deals with a 30KW Interleaved DC/DC Converter for hybrid electric vehicle power supply system which is composed of a fuel cell/battery as primary source and a supercapacitors module as an intermediate energy storage system. A dedicated DC-DC converter is studied, where the design and control are the result of considerations on energy efficiency. The analysis of the efficiency shows that...
The paper presents the digital realization of a model of reactive power flow (QFM) in a steam power plant using a programmable logic controller (PLC). The steam power plant (SPP) model is developed for pre-commissioning validation testing of the coordinated reactive power-terminal voltage (Q-V) control system. The SPP QFM includes a model for a synchronous generator, an excitation system, a step-up...
The performance of a shipboard power station, which is a typical large-scale and complex system, relates directly to marine safety. To guarantee ideal performance, control system should be able to maintain the frequency and terminal voltage of electrical network stable in both steady states and transient processes. However, even for a well-tuned controller, in some special cases, its configuration...
Distributed generation draws increasing attention because of the energy shortage and environmental protection considerations. Furthermore, distribution power generation can improve the power system stability and reliability, providing the local power supply economically. Microturbine based power generation has many applications in distributed generation. In this paper, a mathematical model of a microturbine...
Taking a certain regional power system in China for an object to be researched, a simple and easy way is proposed to model impulsive load, which can be integrated with BPA simulation software. That is, changing measured curves of impulsive load into a column form. With them, the influences of impact loads on the adjacent power plant generator units are simulated under three different operation modes...
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