What is a three-phase imbalance?
Some linearization techniques are applied to simplify the model. Three-phase imbalance is a common phenomenon in three-phase four-wire distribution network systems (DNSs), which may cause power quality deterioration, increase power losses, and can even damage appliances as well.
Is a three phase imbalance related to a total load?
According to the comparison of two cases, it can be seen that the three phase imbalance at each moment is mainly related to the loads distribution on three phases, but not to the total load at that time. However, the active power losses at each moment is positively correlate with the total loads at that time.
How to mitigate three-phase imbalance in distribution system?
A kind of device is utilized to mitigate three-phase imbalance in distribution system. A joint optimization model from the perspective of the whole system is proposed. The current imbalance and voltage imbalance are simultaneously considered. Some linearization techniques are applied to simplify the model.
How do you calculate a three-phase power imbalance rate?
Meanwhile, in order to quantify the imbalance of the three-phase loads, we defined the three-phase active/reactive power imbalance rate of the distribution transformer as (24) L F f, t = max X f, t max - X f, t min X f, t max, X = {P, Q}, i ∈ N, t ∈ T, where X represents the active and reactive power flowing through the distribution transformer.
Can reconfiguration solve a three-phase imbalance problem?
Since the reconfiguration methods are primarily designed for relocating three-phase balanced load among feeders or isolate the fault section in DNSs to reduce network losses and improve power quality, it can just partially solve the three-phase imbalance problem .
Can Y-connected and -connected static reactive power compensation devices mitigate the three-phase imbalance?
In this paper, a joint optimization model based on the Y-connected and Δ-connected static reactive power compensation devices are proposed to mitigate the three-phase imbalance and minimize the active power losses in DNSs.
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