Negative Sequence Current Optimizing Control Based on Railway Static Power Conditioner in V/v Traction Power Supply System

In order to bring railway static power conditioner (RPC) into full play in suppressing negative sequence current in the V/v traction power supply system, the reason of negative sequence current and compensation mechanism were analyzed, and the mathematical model with minimum negative sequence curren...

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Vydáno v:IEEE transactions on power electronics Ročník 31; číslo 1; s. 200 - 212
Hlavní autoři: Zhang, Dinghua, Zhang, Zhixue, Wang, Weian, Yang, Yanling
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.01.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Comparative analysis
Computation
Electric potential
Fluctuations
Linear programming
Negative sequence current
Optimization
Optimization algorithms
power quality
Power supplies
Power supply
Quadratic programming
railway static power conditioner
Railways
Reactive power
Sequences
sequential quadratic programming
Simulation
Traction
Traction power supplies
V/v traction power supply system
Windings
sequential quadratic programming (SQP)
power quality
Negative sequence current
railway static power conditioner (RPC)
V/v traction power supply system
ISSN:0885-8993, 1941-0107
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Shrnutí:In order to bring railway static power conditioner (RPC) into full play in suppressing negative sequence current in the V/v traction power supply system, the reason of negative sequence current and compensation mechanism were analyzed, and the mathematical model with minimum negative sequence current under the constraint of voltage fluctuation, power factor, device capacity, transformer winding capacity, and energy conservation was set up. For solving the small-scale multidimensional nonlinear and constrained optimization problem, an intelligent algorithm based on sequential quadratic programming (SQP) method is proposed through a comparative analysis of existing optimization algorithms and the traditional analytical method. The proposed algorithm is capable to complete an optimizing computation process in several milliseconds with the precision of 0.1 A, and its computational efficiency and precision can meet the needs for real-time control of RPC. A self-adaption real-time optimization computing platform was built in combination with detectable analogue quantities of traction power supply system and RPC, including catenary network voltages, feeder currents, and compensation currents. Simulation and engineering experimentation results are provided to illustrate that the model and its computation are effective and feasible.
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ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2015.2404934