Enhancement of Voltage Stability of DC Smart Grid During Islanded Mode by Load Shedding Scheme

Nassor, Thabit Salim; Senjyu, Tomonobu; Yona, Atsushi

doi:10.1515/ijeeps-2015-0016

Cited by 11 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the power demand during the power system operation is fluctuated greatly by the short-period load variation within 1 h [4][5][6]. These intermittent load fluctuations may cause critical unbalance problems in operating power systems [7][8][9]. Therefore, the power system operator purchases ancillary service at a high price and provides such services for frequency following for the stabilization of power system [10,11].…”

Section: Introductionmentioning

confidence: 99%

Technical Measures to Mitigate Load Fluctuation for Large-Scale Customers to Improve Power System Energy Efficiency

Lee¹,

Lee

Gim

et al. 2020

Energies

View full text Add to dashboard Cite

Industrial equipment such as electric arc furnaces and steel mills are often associated with rapid and high load disturbances, so their power systems require additional control equipment to limit the frequency. However, proper ancillary service fees are not paid in these cases with extreme and variable load demands. The frequency regulation reserve equipment adds to power generation costs. Therefore, variable power generation loads lead to increases in the cost of energy production. We propose a load frequency control method that is applied on the customer end instead of the power supply end to reduce the operating reserve required to improve the energy efficiency of the power system. We analyzed the load fluctuation of steel mill customers using real data sampled at two-second intervals from the energy management system in Korea. We developed an automatic generation control program to simulate the power system’s frequency characteristics. We also propose compensation techniques for mitigation of the system’s frequency deviation at the customer end based on an energy storage system, pump storage hydro generator, customer generator, and plant process adjustment. To recover the frequency deviation, we calculated the compensation facility capacity and analyzed static characteristics, and we proved the feasibility via simulations.

show abstract