| 摘要 |
Electrical power systems and methods using bidirectional power converters to provide, among other functions, uninterruptible power supplies for loads such as cell towers. The power-packet-switching power converter can be connected, for example, to a photovoltaic array, batteries, and a critical load such as a cell tower. An AC generator can also be connected in order to power the cell tower and/or to charge the batteries as needed. Green energy utilization is maximized, power conversion efficiency is increased, and system costs are decreased, by having only a single power conversion stage for all conversions. |
| 主权项 |
1. An electrical power system, comprising:
a multiport power converter, comprising a plurality of electrical ports, each having at least two lines, and an energy transfer reactance comprising an inductor and a capacitor in parallel, wherein each said line of each said port is connected to each end of said energy transfer reactance through multiple respective bidirectional switches; a DC power source connected to a first one of said ports, and an AC power source connected to a second one of said ports, a third one of said ports being connected to lines of a utility power grid, and a fourth one of said ports being connected to an electrical load; and wherein said converter draws power from said first, second, and/or third ports, and drives power into said first, third, and/or fourth ports, while changing the frequency and/or phase of power received at said second port to thereby provide power synchronously to said third and/or fourth ports, and while also compensating transients when power is output to said first port, to thereby provide a smooth power waveform. |
