| 引用本文: | 林玥廷,张维奇,林英明,等.考虑燃煤机组健康度与负荷转移的连锁故障供防控策略[J].电力系统保护与控制,2019,47(17):101-108.[点击复制] |
| LIN Yueting,ZHANG Weiqi,LIN Yingming,et al.Control strategy of cascading failures considering the health degree of coal-fired units and load transfer[J].Power System Protection and Control,2019,47(17):101-108[点击复制] |
|
| 摘要: |
| 随着能源互联网的发展，大规模间歇性新能源并网为电网运行带来挑战，增加了火电的调峰压力，对燃煤机组运行要求也越来越高。设计了对燃煤机组运行状态进行衡量的机组健康度指标，并在此基础上提出了基于发电机侧的结合预防和阻断的连锁故障防控策略。首先，提出用于评估燃煤机组运行状态的机组健康度指标。基于该指标构建协调系统风险和调度成本的多目标规划模型，采用NSGA-II算法计算多目标模型下机组健康度阈值的Pareto前沿，再通过熵权决策法对解集进行评估确定最优阈值。其次，通过比较机组健康度与最优健康度阈值，判断预防阶段或阻断阶段的燃煤机组是否符合负荷转移条件。最后，提出基于燃煤机组健康度的预防控制和阻断控制两种控制策略下的机组负荷调整方案，并以IEEE39系统作为算例进行仿真验证。结果表明，该控制策略能有效地实现电网安全可靠地调度，规避连锁故障的发生。 |
| 关键词: 燃煤机组 连锁故障 健康度 预防控制 阻断控制 |
| DOI：10.19783/j.cnki.pspc.180686 |
| 投稿时间：2018-08-05修订日期：2019-03-11 |
| 基金项目:湖南省自然科学基金杰出青年基金(2017JJ1011) |
|
| Control strategy of cascading failures considering the health degree of coal-fired units and load transfer |
| LIN Yueting,ZHANG Weiqi,LIN Yingming,DING Wei,WU Mingxin,TANG Jun,ZHANG Jiamei,JIANG Qin |
| (Electric Power Dispatching Control Center of GPGC, Guangzhou 510600, China;Datang Xianyi Technology Co., Ltd., Changsha 410007, China) |
| Abstract: |
| With the development of energy internet, large-scale intermittent renewable power integration brings challenge to operation of power grid, which increases the pressure of thermal power peak shaving and requirements for the operation of coal-fired units are getting higher. In this paper, the health degree of the unit for measuring the operating status of coal-fired units is designed, and a prevention and control strategy based on generator side to prevent and block cascading failures is proposed. Firstly, the health degree for evaluating the operating status of coal-fired units is proposed, and a multi-objective planning model for coordinating system risk and dispatch cost based on this index is constructed. The Pareto solution of the health threshold under multi-objective model is calculated by NSGA-II algorithm to get the Pareto frontier and then evaluate the solution set by entropy weight decision method to determine the optimal threshold. Secondly, by comparing the health of the unit with the optimal health threshold, it is determined whether the coal-fired units in the prevention or blocking phase can meet the load transfer conditions. Finally, generators dispatching adjustment schemes under strategies of preventive control and interdict control are put forward respectively based on health degree. The IEEE39 system is used as an example to verify the simulation. The results show that the control strategy can effectively realize the safe and reliable dispatching of the grid and avoid the occurrence of cascading failures. This work is supported by Distinguished Youth Fund of Natural Science Foundation of Hunan Province (No. 2017JJ1011). |
| Key words: coal-fired unit cascading failure health degree preventive control interdict control |
