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This paper concerns the VSC-HVDC application to improve the long-term voltage stability. For this purpose the NORDIC32 test system is considered. All necessary dynamics to study the long-term voltage stability are included in the test system. An appropriate control strategy for VSC-HVDC is proposed in the paper. The goal is to reach the best condition from long-term voltage stability perspective with...
This paper concerns the dynamic and static analysis of the effect of shunt capacitor control strategies on the long-term voltage instability. For this purpose a simplified test system called N3area, reflecting the key voltage instability characteristics of NORDIC32 is considered. Two different control strategies for shunt capacitors including the local and neighboring schemes are applied to improve...
The development of e-government in the Netherlands shows two different worlds. The large national organisations implement Electronic Service Delivery (ESD) fairly successfully, while municipalities are slow to adopt ESD. This is a pity, since municipalities account for over 70% of the public services. They are expected to implement ESD on their own although they lack the necessary resources and distributed...
The Netherlands puts much effort in establishing itself as a modern country and as one of the leading countries in the information age. At the same time, however, it has been losing its position as a forerunner in the electronic delivery of public services. This is mainly due to the fact that most public services are delivered at the level of the Dutch municipalities. At this level eService development...
Renewable technology expands geographically and in capacity. The long transmission distance and bulk power transfer involved make multi-terminal VSC-HVDC systems a key technology for future power systems. This expansion could be hampered by the pace of development of multi-terminal systems especially when standardization is not reached in hardware or the control system. A general control system structure...
This paper analyzes and explains the mechanism behind long-term voltage collapse in the NORDIC32 test system. For this purpose a simplified test system called N5area, reflecting the key voltage collapse characteristics of NORDIC32 is proposed. Applying control algorithms is much easier in N5area than in NORDIC32. Load recovery and generator excitation current limiter actions which are two important...
Distributed Generation (DG) installations have been increasing during the last years. Wind power and photovoltaics are two of the most common renewable energy sources for DG typically connected to the distribution network (DN) originally planned and built to supply loads. DG units connected to the DN impact the voltage where customers are connected. Network voltage is an important quality criterion...
Distributed generation (DG) in medium voltage distribution networks has become widespread during the last years. Distribution networks are normally planned and built to cope with decreasing voltage from the substation along the feeders. With a high DG penetration the power flow can be reversed in some feeders during some time periods and thus the voltage increases along the feeder. In this paper an...
During the last years the amount of electricity generated by Distributed Energy Resources (DER), especially wind turbines, has been increasing a lot. These Distributed Generation (DG) units are often connected to rural distribution networks, where they have a large impact on the voltage and the network losses. The network voltage at the customers point of connection is an important quality criteria...
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