The Short-Term Electricity Markets in India are operated based on the Available Transfer Capability (ATC) declared by National Load Dispatch Centre (NLDC). A realistic determination of ATC is thus necessary for optimal market operation in India. This paper discusses the various issues and challenges in the ATC calculation and the methods that can be adopted to make a more realistic estimation of ATC. In this paper a Modified Repeated Load flow Method (MRPF) is presented for calculation of Total Transfer Capability. The method is applied to the All India 3771 Bus system and the time of calculation of TTC by MRPF method is compared to the RPF method. The study is also conducted to analyze and assess the effects of loop-flows, and simultaneous power transfers between the different regions of the Indian Transmission Grid
The deregulation of Power Sector in India has led to the development of a vibrant power market. The Short Term Power Markets in India have gained momentum following the Electricity Act of 2003. The inter-regional Short Term Markets in India are run based on the inter-regional Available Transfer Capability (ATC). The ATC is an indicator of the feasible trade between the regions involved in trade. ATC calculation must consider the violation of thermal limit, voltage limit and stability limit for an accurate analysis. This paper presents a method to calculate the Total Transfer Capability (TTC) which is the basis of calculation of ATC based on the thermal limits of the transmission lines considering the variation of ambient temperature across the Indian subcontinent. IEEE standard for calculating the current temperature of bare overhead conductor is used to determine the thermal ratings of the line. The thermal ratings obtained are used to determine the Inter-regional TTC of the system. The case study is conducted on the All India N-E-W Grid 3771 equivalent bus data. The TTC without considering the variation in Temperature across the Indian landmass is compared to the TTC values obtained after the consideration of the variation of temperature across the sub-continent.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.