PMU Based Islanding Operation Control Method for Ultra-High Voltage Direct Current Transmission System
Influenced by the operation characteristics of the Ultra-High Voltage(UHA)DC transmission system itself,it is difficult to realize rapid stabilization of the circulating current during the islanding operation phase,and the article proposes a study on the islanding operation control method of the UHV DC transmission system based on the Power Management Unit(PMU).Considering that the angle of output voltage will be changed instantaneously by the influence of Voltage Sourced Converters(VSC),the proposed active-phase angle sag control method,the inverter determines the reference coordinate system of Pike transformation through the synchronization signal of miniature PMU,and takes the target maintenance frequency of the islanded operation stage of UHV DC transmission system as the control benchmark.benchmark.Guided by adjusting the phase angle reference values of all Distributed Generation(DG)units in the UHV DC transmission system to be in a consistent state,the amount of active compensation is controlled by combining the common bus voltage phase angle parameter measured by the micro PMU.In the test results,the degree of deviation from the situation that occurs after the loop current reaches the value of 0 stabilizes within 10.0 VA and reaches the 0 steady state within 0.8 s after the test.
Ultra High-Voltage(UHA)direct current transmission systemisland operationtarget maintenance frequencyvoltage phase angle parameteramount of active compensation
万方数据
维普
