Analysis Of Voltage Stability Of Hami Grid Containing High Permeability Intermittent Energy

Effects of intermittent power suppling to the grid voltage is the key of the safe operation of power grid. Hami area includes not only the gap of supply and high permeability, and access to the electric iron in large amounts, and by the AC and DC transmission system and the other grid. This increases the voltage instability in Hami area.In order to simulate the static and dynamic voltage stability of Hami power network, the Hami power network model including high permeability gap power supply, electric load and DC transmission system is built in PSASP.;The characteristics of power network structure and power supply in Hami:The partition of Hami power grid research, the Hami power grid is divided into northern, central and southeast regions, selection of key nodes in each region, analysis method of PV curve, the static voltage stability of Hami area of high permeability intermittent power access simulation, analysis and comparison of the key node load power margin the index and margin index of voltage, reveal the node voltage is relatively weak, and explain the reason of its appearance in Hami area; the dynamic voltage stability of the power supply gap of high permeability access from the following four aspects: simulation to mahuanggou West and North Section Yandun substation as an example, when wind power disturbance are access node of the total installed capacity of wind power 40%, change the node voltage and power transmission lines;Effects of Shisanjianfang area of electrified railway load on the region related to the node voltage fluctuation; clusters of wind power and photovoltaic power station in three kinds of different network capacity condition under, whole network of 750 k V and 220 k V substation on the bus voltage change situation; five surf the Internet for different DC power supply facilities with different DC send power combined conditions, unipolar atresia after the occurrence of the Tianshan station 750 k V, 500 k V and wind machine terminal bus voltage variation situation. On the basis of the static voltage stability analysis of weak nodes and Hami grid existing reactive power allocation, application of capacitors and reactors, static var compensator and high resistance to partition the voltage level formulation for reactive with measures, the voltage level of the voltage control in a certain range, in order to achieve the purpose of improving voltage stability in Hami area. The simulation results show that the scheme is of benefit for improving the voltage stability of Hami area.Hami region of static voltage stability are studied by modeling and Simulation in this paper, gives the Hami grid voltage is relatively weak link. The four typical disturbance, Hami grid voltage changes, based on analysis the possible voltage line. Aiming at the two aspects of the analysis results with no effective measures of reactive power compensation, simulation results show that the compensation measures can effectively improve the Hami grid voltage stability and provides a powerful reference for Hami grid for the future research.