Optimized energy exchange in primary distribution networks with DC links

Intelligent load-flow control allows efficiency-maximized and cost-optimized operation of a power distribution network. Networks with differing parameters can be linked, and voltage stability and power quality are influenced positively. The scope of new applications using power converter technology is presented, and specific applications are explained in this paper. This paper shows what scope is offered by innovative power supply systems for enhancing supply conditions and cutting costs. DC long-distance transmission and back-to-back links are nothing new in the high-voltage sector. The advances made in power electronics mean that such systems are also of interest for medium voltage. With SIPLINK (Siemens multifunctional power link), Siemens has developed a system for medium voltage, which cuts investment costs, system costs and lifecycle costs - depending on the particular application and configuration of the existing network. SIPLINK controls load flow in power transmission and optimizes voltage stability by provision of reactive power.