关键词: 特高压（UHV）, 受端电网, 网源协调, 电网, 燃煤发电机组, 可调出力, 供热, 辅机, 煤质

Abstract: To avoid the impact of UHV faults on the receiving end power grid and effectively enhance the response ability of the local power resources, the study on the adjustable output online monitoring model is carried out based on the concept of power grid coordination. The model assesses the adjustable power output margin of the main coal-fired units in the aspects of the heating unit, the main auxiliary equipment running state, and the coal quality. This model tends to help the electric power dispatching department for decision making on dealing with extra high voltage failures. The model has been put into trial operation in Jiangsu power grid and been dynamically evaluating the adjustable output of more than 130 units in the province, providing real-time and reliable online monitoring and evaluation results.

Key words: UHV, receiving end power grid, coordinated control of power grid and power supply, power grid, coal-fired generation unit, adjustable output, heating, auxiliary equipment, coal quality