PV Inverter Reliability-Constrained Volt/Var Control of Distribution Networks

V-Iq Based Control Scheme for Mitigation of Transient Overvoltage in Distribution Feeders With High PV Penetration

“…These methods mitigate steady-state voltage deviations but are not effective against transient overvoltage caused by abrupt changes of the PV output power during cloud passing. To solve this issue, a real time V-Q based voltage control scheme is presented in [29,32], in which the reactive power is calculated from the instantaneous value of the rms voltage. Although cloud passing is considered in [20,21], but stability concerns have not been investigated.…”

“…Although cloud passing is considered in [20,21], but stability concerns have not been investigated. Furthermore, the maximum value of the reactive power and hence the slope of the curve is changed with the PV's operating point such that the apparent power is limited to the nominal value [32]. It is shown that by decreasing the slope of the V-Q curve, the damping of the system can be improved at the expense of increasing the steady-state voltage deviation.…”

Data-driven control and operation of active distribution system

“…where P ij,t loss is the power loss of the branch from bus i to bus j at time t, 𝑉 𝑖,𝑡 is the voltage magnitude of bus 𝑖, 𝑉 𝑛 is the reference value and is set as 1.0 p.u.. With eq. (6.1)-(6.2), a multi-objective VVC optimization model is formulated as below [93]: , ,…”

“…However, providing reactive power support can impact the reliability of the inverters, as reported in ref. [23],…”

“…Eq. (5.7) limits the maximum reactive power that an inverter can deliver according to the apparent power capacity, 𝛿 is the coefficient corresponding to the reliability constraints for ensuring the lifetime of the PV-inverters [23]. Eq.…”