摘要
为了提高系统的电压稳定性,在传统下垂控制的基础上,提出了一种基于有功电流和无功电流相结合的自适应下垂控制方法。详细介绍了构网型变流器并联组成微电网的控制策略。下垂控制器分为电流(功率)解耦、一阶微分和下垂控制3个单元。从同步发电机的角度出发,分析了一阶微分环节和下垂系数的设计原则。分析并验证了构网型变流器并联系统功率分担的“通信机制”。最后,建立仿真模型,通过仿真结果验证了该方法的可行性。
In order to improve the voltage stability of the system.Based on the traditional droop control,an adaptive droop control method based on the combination of active current and reactive current is proposed.The control strategy of microgrid composed by parallel network converter is introduced in detail.The droop controller is divided into three units is current(power)decoupling,first order differentiation and droop control.From the point of view of synchronous generator,the design principle of first order differential link and droop coefficient is analyzed.The“communication mechanism”of power sharing in parallel system of grid converter is analyzed and verified.Finally,a simulation model is established,and the feasibility of the proposed method is verified by the simulation results.
作者
何丰钰
陈兰杭
李先允
段梵
HE Fengyu;CHEN Lanhang;LI Xianyun;DUAN Fan(School of Electrical Engineering,Nanjing Institute of Technology,Nanjing 211167,China;State Grid Corporation of China Zhenjiang Power Supply Company,Zhenjiang 212000,China)
出处
《自动化与仪表》
2024年第2期5-10,共6页
Automation & Instrumentation
基金
国网镇江供电公司现代智慧配电网示范研究服务项目(SGJSZJ00BGWT2311202)。
关键词
构网型变流器并联
功率分担
下垂控制
一阶微分
下垂系数
parallel connection of grid-forming inverter
power sharing
droop control
first-order differentiation
droop coefficient
