Optimisation of design of suburban sub transmission network with distributed renewable energy systems Lekshmi S1, Sasi Amrita2, Shaju P P3, Dr. Anand S R4 1Asst. Engineer, Kerala State Electricity Board Ltd. 2Asst. Executive Engineer, Kerala State Electricity Board Ltd. 3Executive Engineer, Kerala State Electricity Board Ltd. 4Director (Transmission, System Operation, Planning & Safety), Kerala State Electricity Board Ltd. Online published on 6 May, 2023. Abstract This paper discusses the design considerations for the 33kV Unitised substation project being implemented in Kerala State Electricity Board Ltd (KSEBL) for development of Sub-transmission network in Kerala for evacuation of Green Energy and facilitating network availability for EV charging. The unmanned 33 kV unitized substations are situated near to load centers to carter the increasing load demand, providing a resilient network for distributed renewable power evacuation. The scheme also considers shifting of the existing load on the 11 kV distribution network to 33kV thus reducing the losses. A ring main network is considered in the 33 kV realizing redundancy of supply, where each unmanned unitized substation will be situated nearer to the load centers with single transformers feeding local load. This cost effective solution for meeting the increasing load demand can further be extended to have automated single point control of all unmanned 33kV unitized substations in immediate future. Top Keywords Unitised 33kV substations, Unmmaned substations, RMU, Remote operation, Sub transmission network. Top |