Superposition technique for MOV-protected series capacitors in short-circuit calculations

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/61.400921· OSTI ID:136573

Mahseredjian, J; Lagace, P J; Lefebvre, S ^[1]; Chartrand, A ^[2]

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1. Inst. de Recherche d`Hydro-Quebec, Varennes, Quebec (Canada)
2. Hydro-Quebec, Montreal, Quebec (Canada)

A new method for modeling series capacitors protected by metal oxide varistors is developed using superposition on sequence networks. This technique is incorporated in a short-circuit program within an iterative process which allows the consideration of the nonlinear characteristic of metal oxide varistor (MOV)protected series capacitors. The iterative process is rendered dynamic by evaluating the voltage and current of the series capacitors and by adjusting the state of the varistors at each iteration without reformulating the network nodal admittance matrix. The 60 Hz impedance characteristic of the nonlinear MOV protected series capacitors is simulated by fictive shunt current sources across varistors. Results show that the proposed procedure can adequately and efficiently model MOV protected series capacitors in a standard short-circuit program.

• OSTI ID: 136573
• Report Number(s): CONF-940702--
• Journal Information: IEEE Transactions on Power Delivery, Journal Name: IEEE Transactions on Power Delivery Journal Issue: 3 Vol. 10; ISSN ITPDE5; ISSN 0885-8977
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CALCULATION METHODS
CAPACITORS
ELECTRIC CURRENTS
EQUIPMENT PROTECTION DEVICES
SIZING