Study of Grid-Connected PV System for a Low Voltage Distribution System: A Case Study of Cambodia

Vai, Vannak; Eng, Samphors

doi:10.3390/en15145003

Cited by 9 publications

(4 citation statements)

References 26 publications

(28 reference statements)

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“…The power losses in the transformer and the cable line in the distribution network are determined by the following expressions [15,17].…”

Section: Resultsmentioning

confidence: 99%

Improving efficiency in a distribution network with asymmetric load due to connected solar panels with a phase relationship

Sattarov,

Sapayev,

Suyarov

et al. 2023

E3S Web of Conf.

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In the article, the distribution of symmetrical loads operating in extreme load, taking into account the total power of the consumers in the power network, was modeled by installing solar panels in apartments. As a result, as a result of the use of solar panels with a total power of 34 kW in the houses in the cable distribution network with a length of 0.444 km, a reduction of active power loss of 21382 kWh (37%) is achieved, a reduction of reactive power loss is achieved by 7309kVAR*hour (37%), the level of overloading of the cable network was 1- in the section of households, from 105% to 85%, and in the section of the last households, a decrease is achieved from 14% to 6%. In addition, it was found that the voltage drop at the ends of the apartments is not at the required level, and when the solar panels are connected, it is at the limit values.

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“…The power losses in the transformer and the cable line in the distribution network are determined by the following expressions [15,17].…”

Section: Resultsmentioning

confidence: 99%

Improving efficiency in a distribution network with asymmetric load due to connected solar panels with a phase relationship

Sattarov,

Sapayev,

Suyarov

et al. 2023

E3S Web of Conf.

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show abstract

“…This section provides several input data used for simulating and analyzing the economic evaluation of the project. Table 3 [3,[27][28][29][30] provides the input parameters, including load growth, the nominal discount rate, the expected inflation rate, the prices of PV panels, the prices of inverters, the prices of cables, etc. These data points are important for accurately modeling the financial performance of the project and assessing its economic viability over its expected lifetime [3,27,28].…”

Section: Tariff Payment For MV Feeders and Households In Rural Areasmentioning

confidence: 99%

“…Table 3 [3,[27][28][29][30] provides the input parameters, including load growth, the nominal discount rate, the expected inflation rate, the prices of PV panels, the prices of inverters, the prices of cables, etc. These data points are important for accurately modeling the financial performance of the project and assessing its economic viability over its expected lifetime [3,27,28]. Additionally, inputs of life-cycle CO 2 emissions for two types of sources (grid and PV) are provided in this section [29,30].…”

Section: Tariff Payment For MV Feeders and Households In Rural Areasmentioning

confidence: 99%

Planning of an LVAC Distribution System with Centralized PV and Decentralized PV Integration for a Rural Village

et al. 2023

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Energy demand is continuously increasing, leading to yearly expansions in low-voltage (LV) distribution systems integrated with PVs to deliver electricity to users with techno-economic considerations. This study proposes and compares different topology planning strategies with and without PVs in a rural area of Cambodia over 30 years of planning. Firstly, the optimal radial topology from a distribution transformer to end-users is provided using the shortest path algorithm. Secondly, two different phase balancing concepts (i.e., pole balancing and load balancing) with different phase connection methods (i.e., power losses and energy losses) are proposed and compared to find the optimal topology. Then, the integration of centralized (CePV) and decentralized PV (DePV) into the optimal topology is investigated for three different scenarios, which are zero-injection (MV and LV levels), no sell-back price, and a sell-back price. Next, the minimum sell-back price from CePV and DePV integration is determined. To optimize phase balancing, including the location and size of PV, an optimization technique using a water cycle algorithm (WCA) is applied. Finally, an economic analysis of each scenario based on the highest net present cost (NPC), including capital expenditure (CAPEX) and operational expenditure (OPEX) over the planning period, is evaluated. In addition, technical indicators, such as autonomous time and energy, and environmental indicator, which is quantified by CO2 emissions, are taken into account. Simulation results validate the effectiveness of the proposed method.

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“…Additionally, in order to determine optimal network routing, the feeders that link the loads to the grid substations utilize the minimum spanning tree (MST) [11]. Furthermore, by implementing radial distribution system optimizations, it is possible to search for the optimal system topologies by the shortest path algorithm that has been developed [12].…”

Section: Introductionmentioning

confidence: 99%

Optimal feeder routing and phase balancing for an unbalanced distribution system: a case study in Cambodia

Kay,

Vai,

Eng

2024

IJAPE

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This paper aims to minimize the distance of the feeder path from high-voltage/medium-voltage (HV/MV) substation to medium-voltage/low-voltage (MV/LV) transformers and minimize power loss in an unbalanced distribution system by the phase-swapping concept-based load balancing. The shortest path algorithm (SPA) and the genetic algorithm (GA) for optimal feeder routing and phase balancing separately in the MV unbalanced distribution network are proposed. First, the relevant data for the system is collected. These data include substation coordinates (X, Y), active and reactive power (P, Q), phase connections, and lines’ impedance (Z). secondly, the performance of the existing configuration of the test system with numerous indications is presented. Finally, the proposed method is performed to minimize the length and power losses. The real 47-bus test system in Cambodia is chosen to demonstrate the proposed method. In this study, overall power losses, the maximum voltage imbalance, and voltage regulation are computed by the backward/forward sweep load flow. The results based on the simulation indicate the importance of the proposed approach, especially for distribution system designers and operators.

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Study of Grid-Connected PV System for a Low Voltage Distribution System: A Case Study of Cambodia

Cited by 9 publications

References 26 publications

Improving efficiency in a distribution network with asymmetric load due to connected solar panels with a phase relationship

Improving efficiency in a distribution network with asymmetric load due to connected solar panels with a phase relationship

Planning of an LVAC Distribution System with Centralized PV and Decentralized PV Integration for a Rural Village

Optimal feeder routing and phase balancing for an unbalanced distribution system: a case study in Cambodia

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