Power System Static Voltage Stability Analysis Including Wind Farms

With the energy crisis and environmental pollution damage situation is increasingly grim,the development and utilization of renewable clean new energy has become the focus of the world's consistent study of the world.Among them,the wind energy inexhaustible and the advantages of clean,making the wind energy resources have been valued by all countries.The proportion of wind power in the capacity of the power system is also increasing,but the randomness of wind power and the demand for reactive power of the system also make the voltage stability of the power system more prominent.Taking into account the randomness of wind power,it is very important to analyze the voltage stability of power system with wind farm,to master the degree of voltage stability of the system,to prevent the system voltage collapse and to monitor the system voltage very well.In this paper,considering the wind power randomness,the probabilistic evaluation of the static voltage stability of the system is carried out.Combined with the genetic algorithm,a reasonable method of reactive power / voltage control for the power system with wind farm is proposed.Finally,based on the static voltage stability index,Wind farm injection power The best partition under the desired scenario,the best choice for each zone of the no-function compensation node.The main contents are as follows:Based on the power flow calculation model of the wind power system,the electrical connection between the power of the injected node and the static voltage stability of the system is analyzed.The randomness of the wind power is analyzed by combining the random distribution of the active power in the wind farm.The static voltage stability of the load nodes of the system,and the probability of static voltage stability of the system to assess the safety and stability of the system to provide accurate information.Reasonable reactive power / voltage control partitioning of the system.Because the traditional sensitivity matrix information is not comprehensive,which leads to the power node and the load node between the electrical connection between the neglect,so the establishment of full-dimensional node voltage / reactive sensitivity synthesis matrix.On this basis,the use of genetic algorithm,combined with the upward classification ofreactive power / voltage control partition ideas,wind power system with wind power /voltage control partition.Aiming at the contradiction between the randomness of wind power and the stability of system reactive power / voltage control zoning,the concept of proportional fitness is introduced,the factors of wind farm are reasonably dealt with,and the simulation results are validated.Based on the static voltage stability index,the best reactive power / voltage control partition under the expected field of the wind power injection power is selected,and the simulation results are validated.