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hvdc
Digital controller for hybrid filter in HVDC based on approximate inverse system
      
The results of both simulations based on PSCAD and experiments on a 30 kVA HVDC system prove that the proposed digital control system is stable and efficient for eliminating the harmonics.
      
A robust adaptive control with unmodeled dynamic for HVDC transmission systems
      
Utilizing the feature of quick response of HVDC to improve the performance of AC/DC system has become the emphasis to be researched.
      
The additional control of HVDC with unmodeled dynamics only uses the local signals and its design is simple, furthermore it can obviously improve the stability of power system in different operational conditions.
      
Analysis of nonlinear electric field of hvdc wall bushing with a finite element approach
      
With the model and the iteration technique established, the nonlinear characteristics of the HVDC wall bushing can be investigated with efficiency.
      
Modern travelling wave based fault location techniques for HVDC transmission lines
      
In order to apply the travelling wave principles to HVDC transmission lines, the special technical problems are studied.
      
Based on this, a fault locating system for HVDC transmission lines is developed.
      
In the system, the fault generated transients are induced from the ground leads of the over-voltage suppression capacitors of an HVDC line through specially developed travelling wave couplers.
      
The system was applied to 500 kV Gezhouba-Nanqiao (Shanghai) HVDC transmission line in China.
      
A new converter equivalent circuit for fast digital simulation of multiterminal HVDC systems
      
A new converter equivalent circuit suitable for dynamic simulation of multiterminal HVDC systems with multibridge converters is presented.
      
A new control design for multiterminal HVDC systems using optimal entire eigenstructure assignment
      
This paper presents a new method of control design for multiterminal HVDC systems.
      
The feedback-gains are computed to assign the closed-loop eigenvalues of the HVDC system at any specified distinct modes and simultaneously minimize an appropriate linear quadratic (LQ) performance index.
      
A suboptimal static controller for HVDC links supplying isolated AC networks
      
The design of a centralized suboptimal static controller for HVDC links connected to load systems without AC generators, using the projective control technique, is presented.
      
Soft switching techniques have been applied to develop a novel dc/dc power converter for feeding small loads (under 5?MW) with low cost and high reliability, from HVDC transmission lines.
      
 

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