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A dynamic equivalent approach based on coherency is researched for dynamic simulation test in ±800 kV DC transmission project from Yunnan to Guangdong in China. To reduce the full system, the dynamic equivalent model of large-scale power system based on coherency is established, in which the identification of coherent generator groups, coherent buses reduction, aggregation coherent generator parameters...
With the developing of power system, there many power plant of HUBEI JINGZHOU CHINA with small generation capacity interconnected with weak lines and more and more small capacity interconnected to power grid threaten the stability of power system. The small capacity system is not normally meet local load (contrariwise), and sometimes even larger shortage. Aimed at the different types of small electric...
With the increase of wind generation penetration in power systems, it becomes more and more important to study its impact on power systems characteristics. The accurate dynamic modeling of wind plants is critical for the grid planning and operating studies. The field test of a three phase short circuit fault at a 35kV busbar in a wind farm in Zhangjiakou Area was performed and a series of corresponding...
In this paper the analysis of small signal stability of grid-connected doubly fed induction generators (DFIG) is presented. The detailed model of grid-connected DFIG wind turbine is firstly established, and the eigenvalues are classified and characterized based on participation factors. Then the modal analysis including its converter and pitch controllers is studied, and model simplification of the...
In this paper, using a new solution method, the phasor simulation, a model of two-machine power system with static var compensators (SVC) and power system stabilizers (PSS) is built. By this system model, the transient stability analysis of this two-machine power system when single-phase fault and 3-phase fault is simulated. The result shows that the phasor solution method can reduce simulation time...
Restoration of power system operation after a major collapse is a complex process. It involves many technical and organizational aspects. And restoration has often to be handled under stress. Thus it is essential that restoration is analyzed beforehand and trained by the operators. To do all this, simulation tools are necessary. The paper starts to list a number of critical aspects during restoration...
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