Hybrid three-phase power flow analysis method for ungrounded distribution systems
First Claim
1. A method for a three phase power flow analysis of an ungrounded power distribution system, comprising a step:
- partitioning a topology of the power distribution system into a mainline system and a set of tap systems, wherein the mainline system is formed by mainline buses connecting a swing bus and a set of constant active power and voltage magnitude(PV) buses, wherein the tap system is formed by one or many tap buses, such that a root bus of each tap system corresponds to a mainline bus; and
iteratively performing two voltage determining steps until voltage mismatches for all mainline and tap buses are less than a maximum tolerance;
determining voltages of the mainline buses based on a function of a total load of each tap system; and
determining voltages of tap buses based on a voltage of the corresponding root bus of the mainline and load of each tap bus, wherein steps of the method are performed by a processor.
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Abstract
A method for a three phase power flow analysis of an ungrounded power distribution system partitions a topology of the power distribution system into a mainline system and a set of tap systems, wherein the mainline system is formed by mainline buses connecting a swing bus and a set of constant active power and voltage magnitude (PV) buses, wherein the tap system is formed by one or many tap buses, such that a root bus of each tap system corresponds to a mainline bus. Next, the method determines voltages of the mainline buses based on a function of a total load of each tap system; and determines voltages of tap buses based on a voltage of the corresponding root bus of the mainline and load of each tap bus.
24 Citations
17 Claims
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1. A method for a three phase power flow analysis of an ungrounded power distribution system, comprising a step:
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partitioning a topology of the power distribution system into a mainline system and a set of tap systems, wherein the mainline system is formed by mainline buses connecting a swing bus and a set of constant active power and voltage magnitude(PV) buses, wherein the tap system is formed by one or many tap buses, such that a root bus of each tap system corresponds to a mainline bus; and
iteratively performing two voltage determining steps until voltage mismatches for all mainline and tap buses are less than a maximum tolerance;determining voltages of the mainline buses based on a function of a total load of each tap system; and determining voltages of tap buses based on a voltage of the corresponding root bus of the mainline and load of each tap bus, wherein steps of the method are performed by a processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for a three phase power flow analysis of an ungrounded power distribution system, comprising:
a processor for partitioning a topology of the power distribution system into a mainline system and a set of tap systems, and for iteratively determining voltages of mainline buses based on a function of a total load of each tap system and determining voltages of tap buses based on a voltage of the corresponding root bus of the mainline and load of each tap bus until voltage mismatches for all mainline and tap buses are less than a maximum tolerance. - View Dependent Claims (17)
Specification