tailieunhanh - The optimal location and compensation level of thyristor controlled series compensator (TCSC) in wholesale electricity markets considering active power reserves

In this paper, a method for determining the optimal location and control parameters of TCSC in the wholesale electricity market, which consists of price-sensitive loads and ancillary services related to frequency control has been suggested. | Journal of Science & Technology 131 (2018) 036-041 The Optimal Location and Compensation Level of Thyristor Controlled Series Compensator (TCSC) in Wholesale Electricity Markets considering Active Power Reserves Pham Nang Van*, La Minh Khanh Hanoi University of Science and Technology – No. 1, Dai Co Viet Str., Hai Ba Trung, Ha Noi, Viet Nam Received: January 17, 2017; Accepted: November 26, 2018 Abstract In the electricity market operation, when the congestion in power systems appears, total system cost increases, making the difference of locational marginal prices on the branch becomes bigger and generators can have market power. One of the measures to overcome network congestion is using thyristor-controlled series capacitor (TCSC). In this paper, a method for determining the optimal location and control parameters of TCSC in the wholesale electricity market, which consists of price-sensitive loads and ancillary services related to frequency control has been suggested. The sensitive method based on performance index is employed to optimally locate TCSC. The TCSC compensation level is appraised by co-optimization technique of energy and active power reserves with an objective function to maximize social welfare and minimize investment cost of TCSC. Moreover, this work has also made a comparison between additional social welfare and the investment cost of TCSC. The calculated results are applied on the North power system in Vietnam. Keywords: Locational marginal prices (LMP), wholesale power markets, active power reserves, sensitive method, thyristor-controlled series compensator (TCSC), AC optimal power flow (ACOPF). 1. Introduction access and enhance competitiveness among participants, demand on security and reliability of transmission network has increased enormously. Thyristor controlled series compensators (TCSC) have been evaluated to become one of measures which can considerably benefit modern power systems in term of increasing power transfer limits, .