结合新能源的电力系统调度策略的研究

发布时间：2018-03-03 18:44

本文选题：电力调度　切入点：新能源　出处：《东北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：2015年,我国对风电机组的装机量超过11.46万MW,光伏机组装机量超过1.86万MW,总共安装新能源机组数目超过7万台。新能源大规模并网下,其大多处于负荷较低的地区,因为电网规模小,如果远距离传输,网损和层层变损对输电经济性影响很大。同时新能源波动性、随机性特质使电力调度的调峰问题愈加严峻。为了降低输电网络的运行费用,达到经济调度、合理调度的目的,针对电网企业安全运行中存在的经济、快速调度的不足之处,对结合新能源的调度策略进行研究。实现的主要工作具体如下:首先,对电力系统发电端调度策略进行深入研究,在新能源机组与传统机组组合发电调度的前提下,研究当下调度算法的特点,并对解决效果进行了分析。针对大规模新能源机组并网,机组组合发电算法的计算易造成“维数灾”问题,对新能源并网下的如何快速计算机组组合的最小成本花费问题进行研究,设计了基于决策量的动态规划算法,以符合新能源的约束要求作为决策,对新能源机组的出力进行合理安排,最终快速计算负荷供给平衡下的最小经济成本。其次,对自主运行的电力孤岛进行最优路径规划的研究,孤岛是脱离大电网自主运行的小型局域电网。含有大量新能源并网使网络接线数目增加,连线方式特别复杂,区间位置跨度大,输送途中也存在较高事故发生的可能。当局部因某原因出现电力孤岛时,应快速确定最佳输电路径供应电力孤岛,尽可能减少传输过程的损失。本文提出基于改进的启发式搜索最优路径规划算法,以维护大电网安全、保证电力孤岛稳定运行同时,减少网络传输的花费。最后,对上述电力系统调度策略进行实验验证,本文完成了基于决策量的动态算法和基于改进的启发式搜索算法,从算法执行效率、计算结果分析调度策略的有效性并给出整个策略的具体流程,实验结果表明本文提出结合新能源的电力系统调度策略的研究对电网调度策略提供了一定的参照价值。
[Abstract]:In 2015, China installed more than 114,600 MWs of wind turbines and 18,600 MWs of photovoltaic units, with a total of more than 70,000 new energy units installed. Because of the small scale of the power network, if the transmission is long distance, the loss and the layer by layer change will have a great impact on the economy of transmission. Meanwhile, the fluctuation of new energy and the randomness of the power supply make the problem of power dispatching peak regulation more serious. In order to reduce the operating cost of the transmission network, To achieve the purpose of economic dispatch and reasonable dispatch, aiming at the shortcomings of economic and rapid dispatch in the safe operation of power grid enterprises, this paper studies the scheduling strategy combined with new energy. The main work is as follows: first, Based on the deep research of generation terminal scheduling strategy of power system, under the premise of new energy unit and traditional unit combined generation dispatching, the characteristics of current scheduling algorithm are studied. The solution effect is analyzed. For large-scale new energy generating units connected to the grid, the calculation of generating algorithm of unit combination is easy to cause the problem of "dimension disaster". In this paper, the minimum cost problem of fast combination of computers is studied, and a dynamic programming algorithm based on decision quantity is designed to meet the constraint requirements of new energy. Finally, the minimum economic cost of load supply balance is calculated quickly. Secondly, the optimal path planning of autonomous power island is studied. Islanding is a small local power network that operates independently from the large power grid. It contains a large number of new energy sources and makes the number of network connections increase, the mode of connection is particularly complex, and the interval position span is large. There is also the possibility of higher accidents in transit. When there is an isolated island for some reason, the optimal transmission path should be determined quickly to supply the isolated island of power. This paper proposes an improved heuristic search algorithm for optimal path planning to maintain the security of large power grids, ensure the stable operation of isolated islands, and reduce the cost of network transmission. In this paper, the dynamic algorithm based on the decision quantity and the heuristic search algorithm based on the improved algorithm are completed, and the efficiency of the algorithm is analyzed. The result of calculation analyzes the effectiveness of the dispatching strategy and gives the specific flow of the whole strategy. The experimental results show that the research of the dispatching strategy of power system combined with new energy provides a certain reference value for the dispatching strategy of the power network.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73

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