article · IEEE Access
Integrating thyristor-controlled series compensators into electrical grids improves power system performance by minimising power losses, enhancing transmission line flow reserves, and supporting voltage profiles. However, determining their optimal locations and capacities requires balancing technical enhancements against equipment and generation expenses. A multi-objective optimal power flow framework addresses this challenge using an adaptive parallel seeker optimisation algorithm paired with a technique to reduce the search space. The algorithm identifies optimal placements and ratings for compensator devices under both normal and contingency operating states. Evaluated across standard benchmark networks including nine, thirty, fifty-seven, and one hundred and eighteen bus systems, the method demonstrates lower total power losses and reduced voltage deviations compared to earlier approaches, supporting improved energy utilisation efficiency while controlling overall system expenditures.
Modern electricity grids face growing demands that strain transmission lines and cause energy losses. Optimising where and how flexible alternating current transmission devices are installed helps operators keep grid voltages stable and cut wasted power during normal operations and unexpected failures, all while keeping operational and capital costs low.
This optimisation method could assist transmission system operators and utility engineers planning flexible AC transmission system deployments. By evaluating placement on standard benchmark networks including a realistic 118-bus system, the tool aims to support cost-effective grid upgrades. However, the work remains at an algorithmic simulation stage and has not yet been demonstrated in live utility operations or commercial energy management software.
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Usually, the optimal integration of thyristor-controlled series compensators (TCSCs) aims at enhancing power system performance like all of flexible AC transmission systems (FACTS) devices. The insertion of TCSC unites targets to minimize active/reactive power losses, increase transmission-lines flow reserve beyond the thermal limit, and improve the voltage profile while maintaining the total generation cost of the system slightly affected compared to its single objective base case. In this paper, the optimal power flow (OPF) framework is considered to find the best site and size of the TCSCs devices considering techno-economic issues for reducing the costs of installed TCSCs devices as well as for generation costs. An adaptive parallel seeker optimization algorithm (APSOA) is investigated to employ this techno-economic study. The proposed APSOA is used to solve the multi-objective OPF problem while LSR reduces the search space. The proposed algorithm is tested over three IEEE standards with 9-, 30- and 57-bus test systems at normal and contingency operating conditions. Also, a large system of IEEE 118-bus is used also in order for the proposed technique to be adopted by industry, sound solutions for practical and realistic test systems are needed besides proof of concept on small IEEE test systems. Four-study cases considered to demonstrate the capabilities and gains of the proposed method from the point of view of reducing losses and total voltage deviation to lower levels as compared to those on literature for better energy utilization efficiency.
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DOI: 10.1109/access.2019.2905266
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