Impact of reactive power compensation equipment on the harmonic impedance of high voltage networks

Sensitivity analysis of the Electrical Stresses in Mechanically Switched Capacitors with Damping Network due to Components’ Tolerances

“…As already mentioned, a MSCDN consists of four components that are electrically connected as shown in The value of C 1 , C 2 , L are unequivocally defined by the required reactive power Q r , the nominal voltage U n at PCC, the selected tuning frequency f t and the nominal frequency of the power system f n . The mathematical relations are given in [1] and [2]. The tolerances of these three elements cause a detuning of the MSCDN.…”

“…The calculations are performed for all the possible permutations that appear by modifying each of the four components independently of each other by 1% (11 4 ≈ 14.000). The method to calculate the electrical stresses in each component caused at a given frequency is explained in detailed in [1]. The calculation of these electrical stresses is made with a model based on lossless elements.…”

Behaviour of Mechanically Switched Capacitors with Damping Network (MSCDN) during Energization

“…To compensate this lack of reactive power, a common solution is shunt compensation based on mechanically switched capacitors (MSC). MSCs tend to cause resonances with the grid and must be designed to withstand all harmonics in steady state [1]. A solution to these disadvantages is the Mechanically Switched Capacitors with Damping Network (MSCDN).…”