Scenarios for a South African CSP Peaking System in the Short Term

Silinga, C.; Gauché, Paul

doi:10.1016/j.egypro.2014.03.163

Cited by 15 publications

(16 citation statements)

References 1 publication

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“…There was a significant drop in the indexed tariff from round three -after the introduction of the two-tier tariff. This also proves the feasibility of utilising CSP systems to supply peak energy, as was proposed in the hybrid CSP study [1].…”

Section: Figure 2 South Africa Load Demand Profilementioning

confidence: 73%

“…The previous studies [1], [2] investigated and presented some of the benefits that the proposed peaking CSP system provides in South Africa. The highlighted benefits constituted; capital costs mitigation, incremental fuel dependence reduction, local CSP learning rate, additional reserve margin and lower system LCOE.…”

Section: -3mentioning

confidence: 99%

“…We draw our work from the previously proposed studies: The Short Term Hybrid CSP Peaking System Study (peaking CSP system) [1] and the South African Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) two-tier CSP tariff -Implications for a proposed hybrid CSP peaking system (implications for a peaking CSP system) [2]. The former study proposed a virtual hybrid system comprising of a planned Open Cycle Gas Turbine (OCGT) and an optimized fleet of CSP plants.…”

Section: Introductionmentioning

confidence: 99%

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CSP scenarios in South Africa: Benefits of CSP and the lessons learned

Silinga

Gauché

Niekerk³

2016

AIP Conference Proceedings

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Abstract. The dispatchibility potential of CSP in South Africa was investigated in the previous study. This was done by proposing a virtual hybrid system including the planned Open Cycle Gas Turbines and an optimized fleet of CSP plants. The study revealed a number of benefits; mitigates costs of capital, incrementally reduces fuel dependency, adds reserve margin and leads to a lower LCOE of the system. The subsequent paper to that, investigated the effects of the two-tier tariff structure, introduced in the Independent Power Producer Programme of the Department of Energy, which has on the proposed 3 300 MW capacity of CSP plants that is proposed as a peaking CSP system. The former study showed that the proposed CSP system generates 29 % less revenue under the two-tier tariff. However, when the CSP system is optimized for the two-tier tariff, it becomes profitable -with a smaller storage capacity of 5 hours. This report investigates and presents the results and beneficial strategies from the previous reports. In addition, this report investigates the strategies of increasing the CSP energy share to the peak energy. The results show that the two-tier tariff results in a smaller storage optimized system -due to profitability. The implications would not reflect an increase in the share of CSP energy during peak time. In addition, it reduces the share of CSP energy during the winter season.

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Section: Figure 2 South Africa Load Demand Profilementioning

confidence: 73%

Section: -3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CSP scenarios in South Africa: Benefits of CSP and the lessons learned

Silinga

Gauché

Niekerk³

2016

AIP Conference Proceedings

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“…The overall system model is based on an hourly spatial-temporal method as used in several previous studies [1][2] [3]. All hours of a single year are synchronously modeled in a quasi-steady-state manner and hourly outputs are reasonably validated against what is expected from actual technology outputs in terms of aggregated power generation over each hour.…”

Section: Methodsmentioning

confidence: 99%

“…We have conducted several studies that consider the potential of CSP to serve base-load power in South Africa and worldwide [1] [2]. We have also studied the potential for CSP to offset the avoided cost of diesel powered generators in terms of cost to the system [3].…”

Section: Introductionmentioning

confidence: 99%

CSP opportunity and challenges in a national system: The WWF renewable vision for a 2030 South African electricity mix

Gauché

Backström

Brent

et al. 2016

AIP Conference Proceedings

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Abstract. The WWF proposes a renewable energy vision scenario for South Africa as an alternative to the currently mandated policy which favors additional nuclear in reducing greenhouse gas emissions. Current policy also blends additional coal, hydropower, renewables and gas turbine (open and combined cycle) capacity. We validated and refined the WWF scenario showing that a renewable favored scenario potentially leads to the lowest cost system while also demonstrating better resilience. This paper focusses on the role that CSP plays within the WWF scenario. For the WWF scenario to lead to a low cost and reliable system, significant CSP capacity was needed and the optimal storage rating was high (avg. 12 hours). Through initial sensitivity analysis of the WWF scenario, we try to understand this role. Our findings suggest that provided CSP capacity is planned well, it indeed can play a pivotal role in our future. Not just in justifying a renewable path, but as essential in the best solution for South Africa in the period leading to 2030.

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