Pathom Attaviriyanupap

Transmission Expansion in the Deregulated Power System Considering Social Welfare and Reliability Criteria

In the present paper, the authors propose a new method to determine an optimal transmission expansion plan in the deregulated power system. In the proposed scheme, social welfare and reliability are taken into account. Social welfare is computed from the summation of welfare of all market participants. On the other hand, reliability is determined from the cost of the loss of load or outage cost of consumers. Uncertainties such as generation, load, participant bidding strategies and facility availability are included in the planning problem. Uncertainties of generation and load are handled by using the analytical method while uncertainty of bidding strategy and facility availability are handled by using Monte Carlo simulation. In the proposed method, two transmission expansion cases: enhancing the existing transmission line capacity and investing in the new transmission line are investigated. In both cases, a set of transmission expansion plan candidates are picked up based on the social welfare sensitivity and price difference between buses. The most appropriate plan is selected based on three decision making approaches: average value, risk-based and probabilistic criterion. Numerical simulation is carried out for the modified IEEJ West 10-machine system

Economic Benefit Comparison between Series FACTS Device Installation and New Transmission Line Investment in the Deregulated Power System using Probabilistic Method

Economic benefit of installing a static synchronous series compensator (SSSC) has been evaluated and compared to that of adding a new transmission line for the modified IEEJ East standard model system. The equipment availability and load variations are included probabilistically, and the evaluation has been made in terms of the energy generation bid cost in the deregulated spot market and the investment cost For the model system, the evaluation has favored the installation of a SSSC compared with adding a new transmission line. SSSC applications to other systems can be evaluated similarly

Sail Generator Feasibility Study

In this paper, the authors propose a new small size vertical axis wind power generation system for operating in standalone mode at low speed under weak wind conditions. The proposed system consists of a sail turbine and an outer zipper rotor generator. The sail turbine is designed so that it can catch energy from weak wind and also can protect itself from damage under strong wind. The generator is designed for standalone operation without brush and gear. The feasibility study of the proposed generation system is conducted using Fourier expansion. Analytical results show that the target output can be achieved.

Price volatility and service interruption risk-hedging by transmission contract

In this paper, we propose a transmission contract for reliability and risk-hedging in the deregulated power system. The proposed transmission contract, which is conducted by the transmission system operator (TSO), is a product of the agreements between the generation company (GENCO), the TSO, the distribution company (DISCO), and the large consumer. The proposed transmission contract results in a certain income of the GENCO and provides an incentive for new investments to meet demand in the future. Furthermore, it can help the DISCO and the large consumer hedge the risks, which are caused by the volatility of the price in the spot market. Additionally, for the large consumer, whose load needs high reliable electricity, the proposed contract gives a guarantee that his or her load will always be supplied, or otherwise, he or she will receive a compensation for the service interruption. The effectiveness, especially from the consumers viewpoint, is shown by using the simulation based on two market models: pool model and mixed pool/bilateral model.