Apparatus Section 16: Synchronous Machines: Higher Frequency Cross Currents Between Synchronous Machines
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theoretical Elements of Electrical Engineering |
| Year | 1915 |
| Section ID | theoretical-elements-electrical-engineering-section-37 |
| Location | lines 10124-10189 |
| Status | candidate |
| Word Count | 538 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”XVI. Higher Frequency Cross Currents between Synchronous Machines 30. If several synchronous machines of different wave shapes are connected into the same circuit, cross currents exist between the machines of frequencies which are odd multiples of the circuit frequency, that is, higher harmonics thereof. The machines may be two or more generators, in the same or in different stations, of wave shapes containing higher harmonics of different order, intensity or phase, or synchronous motors or converters of wave shapes different from that of the system to which they are connected. The intensity of these cross currents is the difference of the corresponding harmonics of the machines divided by the impe- dance between the machines. This impedance includes the self- inductive reactance of the machine armatures. The reactance obviously is that at the frequency of theSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”XVI. Higher Frequency Cross Currents between Synchronous Machines 30. If several synchronous machines of different wave shapes are connected into the same circuit, cross currents exist between the machines of frequencies which are odd multiples of the circuit f ...Impedance / reactance
Section titled “Impedance / reactance”... ters of wave shapes different from that of the system to which they are connected. The intensity of these cross currents is the difference of the corresponding harmonics of the machines divided by the impe- dance between the machines. This impedance includes the self- inductive reactance of the machine armatures. The reactance obviously is that at the frequency of the harmonic, that is, if x = reactance at fundamental frequency, it is nx for the nth harmonic. In most cases these cro ...Waves / transmission lines
Section titled “Waves / transmission lines”XVI. Higher Frequency Cross Currents between Synchronous Machines 30. If several synchronous machines of different wave shapes are connected into the same circuit, cross currents exist between the machines of frequencies which are odd multiples of the circuit frequency, that is, higher harmonics thereof. The machines may be two or more generators, in the sam ...Field language
Section titled “Field language”... onic is low, that is, the voltage nearly a sine wave, and with machines of massed armature winding, as uni- tooth alternators, the reactance is high. These cross currents thus usually are noticeable only at no load, and when adjusting the field excitation of the machines for minimum current. Thus in a synchronous motor or converter, at no load, the minimum current, reached by adjusting the field, while small compared with full-load current, may be several times larger than the min ...Chapter-Local Concept Hits
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