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首页> 外文期刊>Journal of regulatory economics >Locational-based coupling of electricity markets: benefits from coordinating unit commitment and balancing markets
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Locational-based coupling of electricity markets: benefits from coordinating unit commitment and balancing markets

机译：电力市场基于位置的耦合：协调单位承诺和平衡市场的收益

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We estimate the benefits of electricity locational marginal pricing (LMP) that arise from better coordination of day-ahead commitment decisions and real-time balancing markets in adjacent power markets when there is significant uncertainty in demand and wind forecasts. To do so, we formulate a series of stochastic models for committing and then dispatching electric generators subject to transmission limits. In the unit commitment stage, the models optimise day-ahead generation schedules under either the full set of network constraints or a simplified net transfer capacity (NTC) constraint, where the latter represents the present approach for limiting forward electricity trade in Europe. A subsequent redispatch model then creates feasible real-time schedules. Benefits of LMP arise from decreases in expected start-up and variable generation costs resulting from consistent consideration of the full set of network constraints both day-ahead and in real time. Meanwhile, coordinating adjacent balancing markets provides benefits because intermarket flows can be adjusted in real-time in response to changing conditions. To quantify these benefits, we analyse a stylised four-node network, examining the effects of varying system characteristics on the magnitude of the locational-based unit commitment benefits and the benefits of intermarket balancing. We conclude that both categories of benefits are situation dependent, such that small parameter changes can lead to large changes in expected benefits. Although both can amount to a significant percentage of operating costs, we find that the benefits of coordinating balancing markets generally exceed unit commitment benefits.
机译：我们估计，当需求和风能预测存在重大不确定性时，通过更好地协调日前承诺决策和相邻电力市场中的实时平衡市场，可以产生电力区域边际定价（LMP）的收益。为此，我们制定了一系列随机模型来提交和分配受传输限制的发电机。在机组承诺阶段，模型可以在整套网络约束条件或简化的净输电能力（NTC）约束条件下优化提前发电计划，后者代表了目前限制欧洲远期电力贸易的方法。然后，随后的重新分发模型将创建可行的实时计划。 LMP的好处来自预期启动和可变发电成本的减少，这归因于日复一日和实时一致地考虑整套网络约束。同时，协调相邻的平衡市场可以带来好处，因为可以根据不断变化的条件实时调整市场间的流量。为了量化这些收益，我们分析了一个程式化的四节点网络，检查了不同系统特征对基于位置的单位承诺收益和市场间平衡收益的影响。我们得出的结论是，这两种收益都与情况有关，因此，较小的参数更改会导致预期收益的较大变化。尽管两者都可能占运营成本的很大一部分，但我们发现协调平衡市场的收益通常超过单位承诺收益。

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