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Security constrained unit commitment with continuous time-varying reserves

机译：安全约束单位承诺与连续的时变储备

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This paper presents a security constrained unit commitment (SCUC) with continuous intra-hour time-varying reserves. The hourly formulation extends the power-based UC formulation and has reserves which vary continuously within the hour, as opposed to the traditional hourly energy-based SCUC that uses constant reserves within the hour. We show that the traditional hourly energy-based formulation cannot ensure N-1 security at all times, since this formulation is not able to take the power trajectories of units within the hour into account. This is remedied by an hourly power-based version which allows the formulation of contingency constraints to guarantee N-1 security at all times within the hour. The proposed formulation uses continuous time-varying reserves which lowers the cost for providing reserves and makes better use of units' flexibility while still ensuring N-1 security. The energy-based and power-based formulations are evaluated using different versions of a 5-min security-constrained economic dispatch (SCED) based on real load data, thus simulating the real time operation of the system under different assumptions for reserve procurement. The results show that the powerbased formulation increases security compared to the energy-based formulation, both if reserves are fixed to the values from the SCUC or co-optimized in real time by the SCED.
机译：本文提出了一种安全约束的单位承诺（SCUC），具有连续的时间间隔储备。每小时配方扩展了基于功率的UC配方，并且在小时内不断变化的储备，而与在小时内使用恒定储备的传统节能的SCUC相反。我们表明，传统的每小时能源的配方始终无法确保N-1安全性，因为此配方无法在帐户中将单位的功率轨迹带到。这是由基于每小时功率的版本进行补充，这允许在小时内始终始终保证N-1安全性。所提出的配方使用连续的时变保留，这降低了提供储备的成本，并更好地利用单位的灵活性，同时仍然确保了N-1安全性。根据真实负载数据使用不同版本的5分钟安全受限经济调度（SCED）的不同版本评估基于能量和功率的配方，从而模拟了系统的实时运行，在不同的储备采购下的不同假设下。结果表明，与基于能量的配方相比，功率的配方增加了安全性，如果储备固定到来自SCUC的SCUC或实时共同优化的值。

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