The Power System Voltage Stability Analysis Under Electricity Market Environment

The electricity market reform brings about new projects for electric power system stability analysis. The voltage stability under electricity market environment was researched in theory and calculation by this paper. The paper began from the important parameter: price, then the 'Reduced Gradient Method' that spot price calculation method was introduced. Then studied the judge method of the power system voltage steady-state stability, brought forward voltage steady-state stability global index, calculation method of the node's affection degree to the voltage stability, and voltage steady-state stability analysis flow, and using example to expounded and proven this analysis. On this base, discovered the spot price was similar to controlled variable sensitivity which was used in voltage steady-state stability analysis, and further expounded the voltage stability information that hiding in spot price theory. Then catch from two kind basis form of electricity market, that is, a single buyer model and bilateral contract model, analyzed the affection of market economy action to voltage steady-state stability, has reached a series of important viewpoint and used market example to simulate finally.