Assessment Method for Substation Capacity Credit of Generalized Power Source Considering Grid Structure

Abstract

This paper presents the concept of the generalized power source in an active distribution network. After the energy storage system (ESS), distributed generators (DG), and demand-side controllable load are connected to the active distribution network, part of the system load can be undertaken by these ESS, DG, and controllable load instead of relying on the capacity of the substation, which greatly improves the reliability of the system. The above-mentioned distributed energy resources in the active distribution network are collectively referred to as the generalized power source (GPS). Substation credible capacity refers to the capacity of the GPS to supply the distribution network that is equivalent at the high voltage distribution network level when considering the faults of the main transformer, 110 kV lines, and circuit breakers. Considering the uncertainties and control strategies of GPS, this paper takes a specific distribution area as the background to study its substituted substation capacity. Based on a sequential Monte Carlo evaluation framework and the principle of constant reliability, an evaluation method of the GPS credible capacity is proposed. In order to verify the effectiveness of the method proposed in this paper, the credible capacity of various typical connection modes of a high voltage distribution network is quantitatively analyzed in the case study, which can provide a reference for the capacity planning of an active distribution network substation and grid structure selection.

Important Factors for Consideration during the Specification of SF6 Circuit Breakers for High Voltage Generators

“…The energy system of the Republic of Kosovo is connected to international transmission lines with the neighboring countries of Albania, Montenegro, North Macedonia, and Serbia, using high voltage transmission lines with high transmission capacities of 400 kV, 220 kV, and 110 kV. This solid connection of the transmission network with the surrounding networks makes the energy system of Kosovo one of the most important electrical nodes in the region [4]. In the transmission system, various power CBs were installed by different manufacturers.…”

“…Many studies have been carried out on this phenomenon. Some research dealing with a similar phenomenon that occurred in the energy system of the Republic of Kosovo (Kosovo is located in the center of the Balkans) has been provided in the references of this paper [1][2][3][4][5].…”

“…Therefore, various electrical relay protection systems for this kind of phenomenon have been developed to protect equipment in this mode of operation. The existence of any differences during the process of activating the generator on the network causes instant or cumulative damage to the turbine, generator, or other elements of the network [3,4].…”

Analisis Tren Konsumsi Energi Listrik pada Penyulang Singkarak

“…Pengembangan juga dapat dilakukan, dengan menggabungkan penyimpanan energi dan sistem distribusinya. Selain itu trend dapat pembentukan platform penjadwalan sistem pembangkitan energi listrik, pengaturan stok bahan bakar, termasuk prakiraan beban dan pasokan energi [6], simulasi sistem, analisis optimasi, bahkan membangun pusat interkoneksi [2] untuk penyaluran dan pengaturan penggunaan daya.…”

Dynamic Performance Simulation and Stable Current Collection Analysis of a Pantograph Catenary System for Trolley Wire Overhead Electrically Actuated LHD

“…The current collection for the pantograph catenary system of the trolley wire overhead electrically actuated LHD is achieved by the sliding contact between the pantograph and the catenary [19,20], as shown in Figure 2. When the trolley wire overhead electrically actuated LHD operates to collect current, the random vibrations between the pantograph and the catenary have a great impact on the catenary.…”