Harmonic filter assessments at a Battery Plant
The facility set a peak demand of just over four megawatts in the twelve months prior to the plant expansion work. It contains 831 rectifier circuits, which represent about 60% of the plant load. Production is divided between building the batteries and charging them. The charging load can be carried based on production, or based on other parameters such as cost of electricity. The plant is served at 480 volts from Duke`s 44-kV sub-transmission system. Prior to the expansion, Duke operated two 1200-kvar switched capacitor banks on the 480-V bus for voltage regulation. After the expansion, Duke removed the capacitors and Freeborn installed a 1016-kvar switched harmonic filter on each delivery point. Inside the plant, Exide operates twelve 84-kvar harmonic filters on individual feeders. All harmonic filters are tuned to the 4.7th harmonic. As mentioned above, Exide operates 831 rectifier circuits. The typical AC system serving rectifiers consists of a 460/230-V transformer, connected wye-delta, rated at 124 kVA. This transformer serves 16 rectifiers. Note that the six-pulse bridge circuit consists of uncontrolled diodes. DC current control is achieved by adjusting current flow through the saturable AC reactors.
- OSTI ID:
- 192218
- Report Number(s):
- CONF-9501113-; TRN: 96:001030-0034
- Resource Relation:
- Conference: 1995 DA/DSM conference, San Jose, CA (United States), 23-25 Jan 1995; Other Information: PBD: 1995; Related Information: Is Part Of DA/DSM 1995 conference proceedings. Volume 1 and 2; PB: 699 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
1000-kVA arc power supply
SiC-Based 5-kV Universal Modular Soft-Switching Solid-State Transformer (M-S4T) for Medium-Voltage DC Microgrids and Distribution Grids