变无功电流比例系数的直驱风电并网系统电压连续穿越控制策略  

Continuous Voltage Ride Through Segmentation Control Strategy for PMSG-based Wind Power Integrated Systems With Dynamic Reactive Current Scale Factor

作　　者：田书新 陈武晖 王盼盼 陈鸿琳 迟永宁 TIAN Shuxin;CHEN Wuhui;WANG Panpan;CHEN Honglin;CHI Yongning(College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,China;Grid Planning&Research Center,Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,Guangdong Province,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China)

机构地区：[1]太原理工大学电气与动力工程学院,山西省太原市030024 [2]广东电网有限责任公司电网规划研究中心,广东省广州市510080 [3]中国电力科学研究院有限公司,北京市海淀区100192

出　　处：《中国电机工程学报》2024年第19期7671-7683,I0015,共14页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：新疆维吾尔自治区重大科技专项(2022A01007-1);南方电网有限公司科技项目(037700KK52190012(GDKJXM20198282))。

摘　　要：新能源并网导则规定风电并网系统应具备电压连续穿越的能力,而现有故障穿越控制策略主要保持无功电流比例系数为定值,缺乏定量描述无功电流比例系数的依据,可能导致后续电压连锁故障与变流器过调制等问题。为解决此问题,提出一种变无功电流比例系数的电压连续穿越控制策略。该策略依据有功电流大小与无功补偿装置切入时机划分故障电压区间,并根据并网准则要求、变流器过流限制、过调制、故障前风机的运行工况以及后续电压连锁故障等约束条件,实时计算出不同故障电压下风电场动态无功电流比例系数。该方法在满足约束条件的同时能最大程度提升风电并网系统的电压主动支撑能力,确保电压连锁故障期间风电并网系统安全稳定运行。最后,在PSCAD/EMTDC软件平台建立仿真模型,验证上述分析的正确性。The renewable energy grid code stipulates that wind power integrated system should have the capability of continuous voltage ride through,but existing fault ride through control strategies mainly keep the reactive current scale factors as fixed values and lack a basis for a quantitative description of the reactive current scale factor,which leads to problems such as voltage continuity faults and converter over-modulation.To solve this problem,this paper proposes a voltage continuous ride through control strategy with dynamic reactive current scale factor.This strategy divides the fault voltage interval based on the active current magnitude and the cut-in time of the reactive power compensation device.Dynamic reactive current scaling factors of wind farms under different fault voltages is also calculated in real time,according to the requirements of the grid code,converter overcurrent limit,over modulation,operating conditions of the wind turbine before the fault and subsequent voltage continuity faults and other constraints.The strategy can maximize the voltage active support capability of the wind power integrated system while satisfying the constraints,and ensure safe and stable operation of the wind power integrated system during voltage continuity faults.Finally,a simulation model is built in the PSCAD/EMTDC software platform to verify the correctness of the above analysis.

关 键 词：直驱式风电并网系统 电压连续穿越 动态电流无功比例系数 自适应无功功率调节 

分 类 号：TM614[电气工程—电力系统及自动化]