A Novel Approach of Rescheduling the Critical Generators for a New Available Transfer Capability Determination

Abstract

The transition to a deregulated electric power system industry has created a highly competitive electricity market with immense power transfer activity performed between the market participants. A poorly-damped oscillation of small-signal instability is usually imminent during a stress power system condition attributed by the base case power transfer or available transfer capability (ATC) compounded with an outage of critical line. The contingency ranking by means of lowest damping ratio is introduced so that execution of the most critical line outage will incite to a poorly-damped oscillation during the base case ATC. The rescheduling of few critical generators determined by using the normalized participation factor is presented in this paper as a novel, non-intricate and cost-effective solution for estimating a new value of ATC while ensuring a secure power system operating condition. Sturdiness of the proposed method is verified through comparison with the weighted-average sensitivity of stability index required for rescheduling the critical generators performed in a case study of 39-bus New England system. Comparative study on the results of cost minimization in generators rescheduling has also been done based on the critical generators selected by the two methods.Index Terms-Available transfer capability, contingency ranking by means of lowest damping ratio, critical generators rescheduling, normalized participation factor, small-signal instability.

Available Transfer Capability Calculation Constrained with Small-Signal Stability Based on Adaptive Gradient Sampling

“…Here, we compare the SQP-AGS's calculation effect on the same problem with a sensitivity method [3] and a participation factor method [4] for IEEE 39-bus system. e results run by the three methods are all restricted to a spectral abscissa constraint as η ≤ − 0.1 and detailedly listed in Table 2.…”

“…Othman and Busan [4] introduce a straightforward approach based on a normalized participation factor to identify critical generators for rescheduling so that a secure power transfer during the outage of critical is calculated. Compared with [3], its major contribution is that it formulates a closed-form of eigenvalue sensitivity with respect to power generation in terms of participation factors.…”

Available transfer capability calculation methods: A comprehensive review

“…Several techniques have been employed in literature to determine DATC . An algorithm based on improved RPF is proposed for the determination of DATC in bulk interconnected grid.…”

Optimal Available Transfer Capability Assessment Strategy for Wind Integrated Transmission Systems Considering Uncertainty of Wind Power Probability Distribution

“…The genetic algorithm [4,5], particle swarm optimization [6], optimal power flow method [7], probability analytical method, stochastic programming method [8], Monte Carlo simulation [9,10], and the enumeration method [11] were adopted for this purpose. For describing the wind power uncertainty, the statistical probability method [12][13][14][15] and scene analysis method [16] are adopted.…”