Prevention and control method for cascading failures of coal-fired unit

• Main Authors: TANG JUN, LIU WENZHE, WU MINGXIN, LU JIANGANG, ZHANG JIAMEI, XIE XIAOPENG, LONG JIANPING, DING WEI, WANG BIN, LI HAOCAI, WANG YINHE, ZHANG CHENGYU, ZOU GUANGQIU, GUO WENXIN, LIN YUETING, LIN YINGMING
• Format: Patent
• Language: Chinese; English
• Published: 30.10.2018
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a prevention and control method for cascading failures of a coal-fired unit. The method comprises the steps of acquiring a health degree, failure maintenance cost and failure load transferring cost of each coal-fired unit; computing the failure rate of the coal-fired unit via the health degree, and computing the risk factor of the same through combining with the failure maintenance cost; building a multi-target function by using minimization of the risk factor and failure load transferring cost as targets; solving a health degree threshold by using Pareto of a multi-target particle swarm optimization algorithm via the multi-target function; and when the health degree is more than the health degree threshold, keeping the running state of the coal-fired unit, and otherwise, transferring load. According to the method provided by the invention, the health degree threshold is analyzed according to the running state of the coal-fired unit, the health degree of the unit is compared with the h