Two-phase STATCOM (Static Synchronous Compensator) management device on traction side of electrified railway, and control method of device
A technology for electrified railways and control methods, applied in flexible AC power transmission systems, reactive power adjustment/elimination/compensation, etc., can solve problems that hinder the effective and smooth progress of power quality control in power systems, large installation and maintenance workloads, and economic costs. Increase and other problems, to achieve the effect of reducing governance cost and operation and maintenance workload, novel control strategy, and obvious compensation effect
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[0020] The present invention will be further described below in conjunction with accompanying drawing and example.
[0021] Such as figure 1 As shown, the voltage level of the system side is 110kV, and the minimum short-circuit capacity is 450MVA. Adopt V / V wiring traction transformer 110 / 27.5kV, the impedance voltage is 8.4%, and the installed capacity is 2×40MVA. There is a train of locomotives running on the left and right power supply arms respectively. Because the loads of the two power supply arms are seriously unbalanced, if the power quality control device is not used, a high-amplitude negative sequence current will be generated on the system side, which will seriously affect the safe operation of the system.
[0022] The STATCOM device is installed between the two-phase power supply arms on the secondary side of the traction transformer, including the converter equipment and the control system. The converter equipment includes two voltage source converters, which f...
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