Power electronics intelligence at the network edge (PINE)

Chou, Hung-Ming; Xie, Le; Enjeti, P.N.; Kumar, P. R.

doi:10.1109/ecce.2017.8096876

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…The base case with 30% PV penetration contains an equal share of autonomous and legacy inverters. Since the likelihood of experiencing voltage issues is location-dependent [9], we randomly select 40 different PV locations. This set includes an instance with a PV cluster with the minimum electric distance from the secondary transformer and another with a cluster at the maximum distance.…”

Section: Model Setup and Evaluationmentioning

confidence: 99%

Interaction Between Coordinated and Droop Control PV Inverters

Lusis

Andrew

Liebman

et al. 2020

Proceedings of the Eleventh ACM International Conference on Future Energy Systems

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Autonomous droop control PV inverters have improved voltage regulation compared to the inverters without grid support functions, but more flexible control techniques will be required as the number of solar photovoltaic (PV) installations increases. This paper studies three inverter future deployment scenarios with droop control inverters, non-exporting inverters, and coordinated inverter control (CIC). The network operation and the interaction between various inverter control methods are studied by simulating inverter operation on two low-voltage networks. Considering 30% PV penetration as the base case, we demonstrate that coordinated inverters can mitigate overvoltages and voltage fluctuations caused by the tripping of passive inverters in 85% of PV location cases when at least as many coordinated as passive inverters are deployed on the 114-node test feeder. However, this rate reduced to 37% with the IEEE 906-node network demonstrating that the deployment of coordinated inverter control may not be able to reverse passive inverter-related voltage disturbances when the build-up of passive inverters has reached a certain threshold.The aggregated PV output from coordinated inverters can be also used to provide grid support services. When the low-voltage networks operate close to the upper voltage limits, the change in the power output from coordinated inverters following a regulation request may be partially offset by passive inverters. Considering an equal number of passive and coordinated inverters, this paper shows that for each unit of the down-regulation request delivered by coordinated inverters, passive inverter output may increase by up to 0.2 units and decrease by up to 0.45 units during coordinated inverter up-regulation.

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Section: Model Setup and Evaluationmentioning

confidence: 99%

Interaction Between Coordinated and Droop Control PV Inverters

Lusis

Andrew

Liebman

et al. 2020

Proceedings of the Eleventh ACM International Conference on Future Energy Systems

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“…Two inverter control strategies for mitigating sudden changes in load or solar PV output relying on a single-loop P −Q regulation method and double loop control method were demonstrated in [29]. Voltage regulation based on network clustering and two-stage inverter output optimisation was presented in [30], but line losses were ignored; we show that reducing line losses is the biggest benefit of OID.…”

Section: Introductionmentioning

confidence: 98%

The Added Value of Coordinating Inverter Control

Lusis,

Andrew,

Liebman

et al. 2020

Preprint

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Coordinated photo-voltaic inverter control with a zero-current injection function and centralised curtailment coordination in low-voltage distribution networks is studied. Comparing to autonomous droop-control inverters, up to 7% more PV output is utilised at high PV penetration with 50 mm 2 low-voltage conductors. The hosting capacity could be doubled when the highimpedance network is constrained by the transformer capacity limits. The added value of coordinated control in terms of the utilisation of active power is diminishing with larger conductors and at lower penetration levels. However, even in that case, it is demonstrated that coordinated inverter control prevents inverter cycling and gives additional flexibility for achieving different objectives such as the fairer distribution of PV curtailment and rewarding PV customers for utilising the excess power locally.

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“…Simulations in [10] demonstrate that increasing inverter reactive power compensation further from the distribution feeder improves the voltage profiles relative to fixed compensation schemes that ignore the size and location of PV inverter. A scalable, decentralized method for voltage regulation using power electronic converters able to support a high amount of PV and electric vehicles at the distribution grid is presented in [11]. An ability to provide reactive power compensation on demand requires each customer in the network to install additional converters increasing the costs of the proposed solution.…”

Section: Introductionmentioning

confidence: 99%

Reducing the Unfairness of Coordinated Inverter Dispatch in PV-Rich Distribution Networks

Lusis

Andrew

Liebman

et al. 2019

2019 IEEE Milan PowerTech

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The integration of a high share of solar photovoltaics (PV) in distribution networks requires advanced voltage control technologies or network augmentation, both associated with significant investment costs. An alternative is to prevent new customers from installing solar PV systems, but this is against the common goal of increasing renewable energy generation. This paper demonstrates that solar PV curtailment in low voltage areas can be reduced and fairly distributed among PV owners by centrally coordinating the operation of PV inverters. The optimal inverter active and reactive power operation points are computed by solving a multi-objective optimization problem with a fairness objective. The main results show that fair optimal inverter dispatch (FOID) results in less power curtailment than passive voltage regulation based on Volt/VAr droop control, especially at high solar PV to load ratios. The effectiveness of the model is demonstrated on a residential low voltage network.

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Power electronics intelligence at the network edge (PINE)

Cited by 8 publications

References 21 publications

Interaction Between Coordinated and Droop Control PV Inverters

Interaction Between Coordinated and Droop Control PV Inverters

The Added Value of Coordinating Inverter Control

Reducing the Unfairness of Coordinated Inverter Dispatch in PV-Rich Distribution Networks

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