The Research of DPFC Considering EEAC
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In this paper, the distributed power flow controller which belongs to the new generation of flexible AC transmission equipment is briefly introduced. The extended equal area criterion is used to study the transient stability of the distributed power flow controller, and the influences of the distributed power flow controller on the extended equal area criterion are analyzed. The equivalent model of the distributed power flow controller is built on the ADPSS software platform. The simulation results verify that this equivalent model is adaptable to extended equal area criterion method. And the method can be used to analysis distributed power flow controller's transient stability.Keywords:
Distributed power
Transient (computer programming)
This paper presents a model of a multi-machine system and examines the efficacy of power system stabilisers and static VAR compensator in transient stability enhancement. The main contribution of this work is a compact, user-friendly and comprehensive model to analyse and reinforce the system stability through a coordinated focus on damping of electromechanical oscillations and suppression of voltage deviations. The model is developed by integration of various mathematical equations pertaining to synchronous machines and some network equations. To test the effectiveness of the proposed model, MATLAB-based simulations are carried out by subjecting the system to challenging transients. The performance evaluation of the model incorporating both power system stabilisers and static VAR compensator is tested against the individual performance of each. It is found that the model is effective in maintaining transient stability as well as improving transient stability limits.
Transient (computer programming)
Static VAR compensator
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The basic characteristics of power system transient stability, the function and feature, and mathematical model of power system blockset and Simulink based on MATLAB are introduced in the paper. MATLAB SimPowerSystems are used to build up Simulink models of a three-machine system. Powerful functions of Matlabinthesimulationofpowersystemareshownbythesimulation of power system failure. The result shows that the dynamic behavior of power system during transient processes can be observed quite accuratelyanddirectly.
Transient (computer programming)
Power system simulation
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Based on structure-preserving Topological Energy Function for a multi-machine power system, the feature of line transient energy distributing over a network after a transient fault was analyzed in the paper. Setting method on reclosing time for a permanent fault was proposed, which is based on network dynamic variables. The method can improve transient stability and damp the interconnected power system oscillation. Simulations with a real inter-connected power system were performed to verify the applicability of the method proposed.
Transient (computer programming)
Power network
Line (geometry)
Oscillation (cell signaling)
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Considering the current status that the electro-mechanical transient simulation and electromagnetic transient simulation are independent relatively and respectively in power system,and based on the actual requirements for both electro-mechanical transient and electromagnetic transient simulations,this paper proposes a data system for the conversion between electromechanical transient and electromagnetic transient sim-ulations based on PSS/E and EMT.The system establishes a contact between electromechanical transient and electromagnetic transient simulation with data conversion.The actual application of the system in Shanghai Power Grid suggests the system can convert the electromechanical transient data into electromagnetic transient data accurately.
Transient (computer programming)
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Abstract Based on electromechanical transient simulation data, an electromagnetic transient simulation model can be quickly generated through a computer program. However, electromechanical transient data are not sufficient to describe completely the corresponding electromagnetic transient simulation model. In view of this, the paper proposes an electromagnetic transient simulation model generation method that integrates multiple information sources. First, the data characteristics of electromechanical transient simulation software PSD-BPA and electromagnetic transient simulation software PSCAD/EMTDC are introduced. Then, considering the difference between electromechanical transient and electromagnetic transient model data, a method to quickly generate PSCAD/EMTDC simulation data is established. This method is based on the electromechanical transient simulation data, and takes into account those information which is not available in the electromechanical transient data but needed in the electromagnetic transient in the conversion process, so that the converted model is more detailed and accurate. Finally, this method is used to model and analyse an actual fault. The simulation results show that the method proposed in the paper is effective and credible.
Transient (computer programming)
Simulation software
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As the number of consumers of electricity increases the electric power generated required to serve the consumers increases. Due to the long distance transmission of the generated power the power system becomes complex. That is why HVDC transmission system used for long distance carriage of power. During transmission of HVDC system protection and security of the system is compulsory in order to minimize the overall losses. This review paper discusses the protection of HVDC line based on transient energy and transient power. The fault which is occurred on the system reflected on three main parts of the system. Using modified traveling wave algorithm the transient parameters are determined and the type and location of fault can be detected. The simulation is done using PSCAD/EMTDC, MATLAB/Simulink. Motivation/Background: Due to the complication of a power system, HVDC power transmission system was chosen. But the system needs protection to secure the transportation of the needed amount of power. Method: In this review paper a modified travelling wave algorithm is used to detect the faults. Results: The result from the output of the algorithm shows the transient power and energy came to stability within short time. Conclusions: By detecting the transient power and energy, it can easily be protect the system from severe problem.
Transient (computer programming)
Power transmission
Transmission system
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Distributed power
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Auto-reclosing is one of the main methods to improve the stability and reliability of power systems. For a transient fault, people generally believe that the earlier the reclosing time, the better the system stability will be. A new application of the transient energy function (TEF) is introduced in this paper to analyze the influence of reclosing time on power system stability and the results show that there exists an optimal reclosing time. The transient energy of the system is minimum when reclosing at the optimal time. Though the TEF of power systems is deduced from classical models, simulation results show that the optimal reclosing time calculated from TEF is also valid in complex model systems. Simulation results of a realistic system (46 generators and 230 buses) show that the method proposed in this paper is very effective for giving the correct optimal reclosing time of transient faults and that the oscillations of the generator angle and transmission line power can be largely damped when reclosing at that time.
Transient (computer programming)
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Transient (computer programming)
Transient analysis
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This paper introduces the working principle and the mathematical model of additional power system excitation control-Power System Stabilizer (PSS). Through established a typical single machine-infinite bus power system simulation model, we simulate the synchronous generator’s transient operational characteristics following a severe disturbance. The simulation results show that the PSS can not only effectively increase the system damping, but also improve operational characteristics of the generator, considerably enhance power system dynamic and transient stability.
Transient (computer programming)
Stabilizer (aeronautics)
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