Island detection method and device, storage medium and converter system

• Main Authors: HUANG WEIHUANG, YUAN ZHIYONG, CAI DONGXIAO, LIU TENG, LI YAN
• Format: Patent
• Language: Chinese; English
• Published: 23.02.2024
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

The invention provides an island detection method and device, a storage medium and a converter system. The method comprises the following steps: monitoring whether a first alternating current frequency of the network-forming converter in a normal operation mode falls into a preset first frequency range or not in real time; if the first alternating-current frequency does not fall into the first frequency range, calculating a target active instruction value according to the offset of the first alternating-current frequency relative to the system rated frequency; adjusting the active power instruction value of the network construction type converter from an original value to a target active power instruction value; monitoring whether a second alternating current frequency of the network construction type converter is within a preset second frequency range or not after the network construction type converter is adjusted to the target active instruction value; if it is monitored that the second alternating current