| 程春田,赵志鹏,靳晓雨,刘令军,钟儒鸿.梯级水电站群高水头巨型机组不规则多限制区自动规避方法[J].水利学报,2019,50(11):1299-1310 |
| 梯级水电站群高水头巨型机组不规则多限制区自动规避方法 |
| Automatic avoidance method for multiple irregular restricted operational zones of giant units with the high head for cascade hydropower systems |
| 投稿时间：2019-08-11 |
| DOI：10.13243/j.cnki.slxb.20190569 |
| 中文关键词: 不规则限制区 机组组合 短期调峰 MILP 凸剖分 |
| 英文关键词: irregular restricted operational zones hydro unit commitment hydropower short-term scheduling MILP convex decomposition |
| 基金项目:国家自然科学基金项目（91547201） |
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| 中文摘要: |
| 高压瞬变流使得西南地区干流梯级水电站群普遍存在多个高水头不规则限制区，这些电站和机组面临响应多个电网负荷需求任务，容易导致机组水头、出力变化频繁，因此，如何快速避开机组多个不规则限制区就成为制约西南地区水电安全经济运行的瓶颈问题。以常见的梯级水电站群响应电网调峰需求任务为背景，本文提出了梯级水电站群高水头巨型机组不规则多限制区的自动规避方法。该方法首先根据Hertel-Mehlhorn凸剖分算法，将去除不规则限制区后的安全运行区剖分为若干个凸平面多边形，然后基于凸优化理论方法和析取规划方法将不规则限制区约束构建为通用混合整数线性规划（MILP）约束形式，并采用Gurobi求解器进行优化求解。提出的方法在西南某干流流域梯级水电站群进行了方法验证，结果显示，该方法可以实现对复杂不规则限制区的自动化规避，充分发挥水电机组的调峰能力。与传统方法相比，所提方法不需要对限制区进行人工预处理，适应于调峰、调频和电力市场化交易等一般性问题，具有广泛的适应性和通用性。 |
| 英文摘要: |
| High-pressure transient flow makes the phenomenon of multiple irregular restricted operational zones common in the mainstream cascade hydropower systems in southwest China. These hydropower stations and units are faced with the task of responding to multiple grid load demands,which may lead to frequent changes in water head and output. Therefore,how to avoid the restricted operational zones of the hydro unit has become a bottleneck restricting the safe and economic operation of hydropower in the southwestern region. Taking the common power grid peak shaving model as the application background, this paper proposes an automatic avoidance method for the multiple irregular restricted operational zones of the giant units with the high head of the cascade hydropower systems. Firstly, according to the Hertel-Mehlhorn convex decomposition algorithm,the safe operating zone after removing the irregular restricted zones is divided into several convex polygons, and then the MILP form of the irregular restricted operational zones constraints are constructed based on the convex optimization theory and the disjunction programming method. The model is finally optimized by the Gurobi solver. The proposed method is tested in a cascade hydropower system in southwest China. The results show that the method can realize the automatic avoidance of complex irregular restricted zones and give full play to the peaking ability of hydropower units. Compared with the traditional method,the proposed method does not require manual pre-processing of the restricted operational zones and is suitable for general situations such as peak shaving and participation of hydropower in the electricity market. |
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