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Fuel cells coupled with biomass gasifiers can offer the potential of highly efficient and renewable power generation in an environmentally friendly and CO2-neutral manner. Three key aspects, i.e. the fuel resources and fuel cell types as well as gas cleaning for this combined system were discussed to present the feasibility of applying biomass gasification (BG) based solid oxide fuel cell (SOFC) system...
This paper investigates power system small-signal oscillation stability as affected by a grid-connected SOFC (solid oxide fuel cell) power plant. It is demonstrated in the paper how the conventional and effective damping torque analysis can be applied to study the effect of the grid-connected FC (fuel cell) power generation on the damping of power system oscillations. It is concluded in the paper...
The output power of the Wave Energy Conversion (WEC) system, such as AWS, varies, which may not satisfy the requirements of the grid code for the integration of wave generation into power grids. To deal with this issue, in this paper the Battery Energy Storage (BES) is applied to smooth the output power of the WEC. The BES is integrated to the converters of the WEC, and the controllers for the battery...
In this paper, the simulation model for grid-integrated PV station is established in DIgSILENT/ PowerFactory. The impact on reactive power and voltage of the grid are investigated for integration of PV station. The principle that PV station affects the voltage of the point of common coupling (PCC) is analyzed. Taking a PV station integration project as an example, this paper discusses the operation...
The influence of end effect on electromotive force, induced magnetic field and flow loss of the reciprocating liquid metal magnetohydrodynamic (LMMHD) generator was investigated. The 3D numerical simulation was done firstly, then the electromagnetic and flow performances predicted from quasi-2D and 3D analyses were compared and three end influence coefficients quantifying end effect were defined....
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...
In this paper, a new nonlinear multimass model has been developed for SSR (Subsynchronous Resonance) evaluation. This paper first gives a brief derivation of the shaft model, which is without damping, and then provides the new nonlinear modal damping model, which is the primary contribution of this paper. Following that, the integrated modal multimass model is shown and applied to the Shangdu power...
This paper introduces several fundamental results on the marginal valuation of coordinated preventive and corrective security actions. These results indicate that the likelihood of contingencies as well as the relative marginal costs of their associated preventive and corrective security actions are determining factors when it comes to handling contingencies in a fashion that is economic and technically...
The target to solve multiobjective optimization problems (MOOP) is to find as many Pareto-optimal solutions as possible. A new algorithm aimed to solve MOOP was proposed in this paper - multi-agent quantum evolutionary algorithm (MAQEA) on the basis of quantum mechanics theory, the study and competition ability of multi-agent system and organic evolutionary strategy. In the multi-agent system, the...
We present a novel method for placing PMU in power systems based on power system intrinsic characteristics. In the method power system was first analyzed for find out the major or critical interchanges and major load areas, major control systems, critical equipments and power plants in the power system. The overall PMU facilities should provide comprehensive information of line flows, bus conditions,...
With the increasing complex operating environment of the electric power system and the ongoing electric power system reform, the traditional power grid needs to be further improved to achieve the transition to the smart grid. At the same time, the global energy and environmental problems became public concern, and the energy-efficient distribution of the power grid can effectively raise the energy...
With the rapid growth of the Chinese economy and the increasing demand for electricity, the problems of energy shortage and environment pollution become more and more severe. In order to solve these problems, all options for power generation by new and renewable energies are enjoying growing attention in recent years. As one of the renewable energies power generation solar thermal power using concentrating...
Carbon capture and storage (CCS) is one of the principal options for reducing greenhouse gas (GHG) emissions from coal-fired power plants. It involves capturing carbon dioxide from power plants, transporting it and storing it in secure places including former oil and gas fields and marine aquifers. However, the use of coal does not only contribute to the global climate change, it also has other important...
A three-phase linear permanent magnet generator (LPMG) can be used to convert wave energy to electric energy. This generator has a simple structure and is economical to use compared with the conventional rotating generators. A LPMG is designed and simulated to convert wave energy to electric energy suitable for the north coast of Iran, Caspian Sea. Influence of wave amplitude, number of phases, floater...
This paper investigates the impact of a large photovoltaic (PV) penetration on power system small signal oscillation stability. A comprehensive model of a single-machine infinite-bus power system integrated with a PV power generation power plant is established. Numerical computation of damping torque contribution from the PV power plant is carried out, which is confirmed by the results of calculation...
This paper presents a control system performance evaluation method based on rough set, which uses historical data as the original decision rule data (training data). Through data discretization, decision rules merge similar terms, condition attribute simplification, calculating the core value of each of the rules, and uses the logic reasoning to achieve the training of historical data. It uses the...
Energy-saving generation dispatching can effectively reduce the energy consumption and harmful gas emission, which is of significant social benefits, helps to further clean energy resources development and promote the sustainable development of power system and the whole society. Therefore, it is of theoretical and practical significance. The establishment of a suit of effective models and algorithms...
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