Power Engineers Window

Grid Operation Part 3 System Interconnection Synchronous Better Start With PART-1 Performance of grid system was encouraging. Found to be favorable for its stiffness with increased system bias and inertia. Interconnection with neighboring system is beneficial to both the systems. It facilitates power assistance to each other during distress condition. Also Government of India undertaking like NPC, NTPC, NHPC had established pooled power plants in the region.  Interconnection were also necessary to draw share of power from such plants. So interconnections with neighboring systems were established. But with this operation criteria had changed. Review of water supply system will high light the issue. Water supply system setup is modified accordingly. There are two tanks with its inflow and outflow lines as in the figure. Both the tanks are connected at bottom by a pipe line. Initially interconnecting line valve IC is kept closed. In this condition both the systems are ...

  Grid Operation Part 2 Grid System Better Start With PART-1 Standalone systems were small and unstable as expansion was limited to local load only. But transformer changed the scenario. Current for specified load is inversely proportional to the operating voltage. Power loss on line is proportional to square of the current and voltage drop on line is also proportional to line current. So power loss and voltage drop problem can be solved by sending power at high voltage. It was possible to change voltage as required by transformer. Also voltage at receiving end can be adjusted as required by transformer tapping. So feeding loads at faraway become practically feasible without any technical hitch. Sending end voltage was raised by step up transformer and power transmitted to faraway loads at high voltage. Receiving end voltage again reduced by step down transformer as required and fed to the loads. In this way third element Transmission was added in power system and system...