Capacity benefit margin assessment in the presence of renewable energy

Abstract

Summary Energy sustainability and reliability issues have created great concerns globally, instigating various utilities to create interconnections with one another for system security and techno‐economic benefits. Capacity benefit margin (CBM) is the amount of transmission capacity reserved between interconnected systems for emergency power exchange between utilities. It is usually estimated by evaluating the reliability of the generating units of interconnected systems to know the amount of external generation required during emergency supply shortage. Various techniques have been employed in literature to evaluate CBM. However, despite the global awareness on the continuous shift from conventional power generation sources to renewable energy sources, the assessment of CBM in the presence of renewable energy has not been addressed. Moreover, existing techniques for CBM calculation are based on iterative optimization and may not scale well to more than one deficient area. To solve these issues, this article incorporates wind power (WP) generation in CBM computation. The proposed technique is based on graph theory and can be used to calculate CBM in the presence of multi‐deficient areas and renewable energy sources, in particular, WP. Simulations using the IEEE 24‐bus reliability test system in MATLAB show that the proposed technique is significantly better in terms of scalability and accuracy as compared to existing techniques. The proposed technique can be employed by utilities for CBM estimation in the presence of renewable energy sources.

Assessment of the influence of wind energy incorporated capacity benefit margin in ATC computation

“…LOLE is the average number of days or hours in a specified period (typically one year) in which the daily/hourly peak load is envisaged to exceed the available generation capacity [26]- [28]. The condition is to maintain the LOLE of the concerned areas to be less than the standard value (usually 2.4 hours/year) [16], [29]. An area with LOLE higher than the standard value is deficient, and it needs external generation through CBM to improve its supply capability.…”

Improving Transient Behavior of a Brushless Doubly Fed Induction Generator through Reactive Current Control of Grid-Side Converter

“…Renewable energy systems are penetrating mainstream power generation due to their environment friendliness and an increasing demand for energy around the world. Variable speed constant frequency wind energy generation systems have gained a lot of popularity over the last decade, thanks to the higher aerodynamic range leading to better efficiency [1], e.g., the doubly-fed induction generator. However, these systems use a brush gear, which leads to difficult deployment and maintenance in remote locations such as in offshore applications.…”

Internal mode control based coordinated controller for brushless doubly fed induction generator in wind turbines during fault conditions

“…Low voltage ride through (LVRT), also referred to as fault ride through, represents the capability of electrical energy generators to remain connected to the power grid during short periods of lower electric network voltage, i.e., voltage dips [7], [8]. The main motivation behind having generators with good LVRT capabilities is to prevent widespread loss of generation caused by a short circuit at high voltage (HV) or extremely high voltage (EHV) levels [9], [10]. The winding current in a generator is responsible to maintain a magnetic field and in turn a minimum voltage to operate the generator.…”