DC voltage stabilization control in telecommunications DC distribution systems

As telecommunication networks have evolved, so also has the need for safe, reliable, and stable DC power-with the power sources working in conjunction with their associated distribution system. Compared to technical advances in other areas of the telecommunications network, few incremental improvements have been made to the DC distribution system to achieve these requirements. Historically, distribution system design and installation practices served only to minimize the effect of load changes; but larger power requirements, longer cable runs, increased capacitive loads, and the use of long-delay interruption devices now place significant new demands on the distribution system. The dynamic effect of such large currents and longer time constants can create a significant period of unstable DC voltage, potentially resulting in costly equipment downtime. By analyzing the factors that affect the DC voltage, including power plants, cable distribution, interruption devices, and degree of fault, it is possible to position large amounts of controlled stored energy in the form of controlled bulk capacitance at strategic points in the distribution system to safely and reliably maintain the DC voltage within the required limits during load changes. Continued technical advancements in component design have made it possible to automatically regulate the large amounts of current associated with dramatic transient events while remaining transparent to normal operations.