Micro-grid and frequency modulation method and frequency modulation device thereof

• Main Authors: ZHANG RONGHAI, JIANG WENZHUO, CHEN TAO, LI JIE, WANG XIAN, LIU PEIPEI, JIANG TAO, SUN BO, CHENG ZHANQIANG, OUYANG BENKAI, ZHUANG ZEHONG, PENG CHUNYAN
• Format: Patent
• Language: Chinese; English
• Published: 08.07.2022
• 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 micro-grid and a frequency modulation method and device thereof. The micro-grid comprises multiple stages of hydroelectric generating units, in each stage of hydroelectric generating units, the installed capacity of the previous stage of hydroelectric generating unit is larger than the installed capacity of the next stage of hydroelectric generating unit, and the frequency modulation method of the micro-grid comprises the following steps: when the micro-grid is in an unstable working state, sequentially adjusting the output power of each stage of hydroelectric generating unit, the frequency of an alternating current signal output by the micro-grid is obtained in real time; and when the frequency of the alternating current signal is within a preset frequency range, controlling the micro-grid to enter a steady-state working state. With the adoption of the technical scheme, when the micro-grid is in an unstable working state, the risk that a hydroelectric device is damaged due to freque