Abstract. This paper presents a new analytical solution method for Supply FunctionEquilibrium-based (SFE) bidding strategy in electricity markets. It is assumed that every Generation Company (GenCo) has some generation units and bids a Linear Supply Function (LSF) for each of its units to the Independent System Operator (ISO). The problem is modeled as a bi-level optimization problem; in the inner level, ISO clears the market to maximize social welfare; in the outer level, each GenCo tries to maximize its individual welfare. The proposed method is used to solve the outer-level problem using an iterative algorithm, in which LSF coe cients are parameterized. The formulation is developed for both elastic and non-elastic demands for single-and multi-generator cases and also for integrated energy and Spinning Reserve (SR) markets with three models of competitions: a-, b-, and k-parameterization. Three sample networks are used to evaluate the proposed method. The results show that the proposed method is e ective and accurate for GenCos' strategic bidding in electricity markets compared with other optimization algorithms.
Votage source converter (VSC) based or current source converter (CSC) based shunt active power filter (SAPF)? It is the main question in harmonic elimination project using SAPF.This paper presents some criteria based on which the designer can decide which type of filter is more suitable for implementation of the project according to the nature and characteristics of the project.
Owing to the importance of cost and power losses criteria, relevant equations will be formulated and comparative analysis will be carried out between conventional structures based on CSC or VSC. For validation of analyses, simulation results have been studied in the MATLAB–SIMULINK environment.
Simulation results have examined two important criteria of power losses and costs. Although the results show the superiority of VSSAPF to CSSAPF in both criteria, this comparison is performed in a general and conventional condition. Using third-order filters of inductive-capacitive-inductive (LCL) type in VSSAPF, using insulated-gate bipolar transistor (IGBT) with reverse-voltage blocking ability in CSSAPF, which eliminates the need to use series diodes, and the use of superconducting technology in the DC-side endpoint in CSSAPF, not only reduce the difference of cost and losses in two schemes but also may lead to the lower costs and losses in CSSAPF than VSSAPF.
This paper is the result of many years working on active power filter and can be useful for engineers who are engaged in industrial projects.
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