Novel constant current method suitable for emergency power support of direct-current power transmission system

• Main Authors: HUANG RONG, ZHANG JINPING, ZHANG PING, HAO XIAOHONG, GU QUN, ZHANG YANQI, MA MING, ZHAO LONG, WANG DINGMEI, LI JIN, DING KUN, CHEN ZHAO, ZHOU QIANG, MA YANHONG, ZHANG YANLI, HAN XUSHAN, DING YUHAN, WANG MINGSONG, WANG NINGBO, LYU QINGQUAN, ZHANG RUIXIAO, HU KAIWEI, ZHANG JIANMEI
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2020
• 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 belongs to the technical field of power transmission, and particularly relates to a novel constant-current method suitable for emergency power support of a direct-current power transmission system. The method comprises the following steps of replacing an input value (a preset current setting value) in a traditional constant-current method with a comparison selector; monitoring transmission power of a direct current system and inputting measured power parameters into a selection and comparison link; and acquiring a new current setting value through comparison in the selection andcomparison link. The current is hierarchically controlled according to a change of power, the method can be more suitable for power fluctuation in power transmission, and stability of a voltage of analternating-current bus can be effectively maintained for power support under emergency conditions. 本发明属于输电技术领域，具体涉及一种适用于直流输电系统紧急功率支援的新型定电流方法，该方法如下：将传统的定电流方法中的输入值(预设电流整定值)用比较选择器进行替换；监测直流系统的传输功率并将所测得功率参数输入选择比较环节中；通过选择比较环节进行比较得出