| 引用本文: | 孙东阳,孙立志,吴凤江.SCESS-DFIG发电系统宽时间尺度功率波动的平抑控制方法[J].电力自动化设备,2018,(9): |
| SUN Dongyang,SUN Lizhi,WU Fengjiang.Smoothing control method of wide time scale power fluctuation for SCESS-DFIG power generation system[J].Electric Power Automation Equipment,2018,(9): |
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| 摘要: |
| 针对高渗透率风电宽时间尺度功率波动平抑问题，提出了将变桨控制与超级电容储能功率控制相结合的功率波动抑制方法。利用超级电容对风电场有功功率波动进行双向快速、准确的调节，有效地控制了输出功率短时间尺度的波动；通过减载变桨控制留出功率裕度，当超级电容电压过低或过高时进行辅助功率调节，既优化了超级电容的能量管理，又实现了宽时间尺度的功率波动抑制。在通过建立含有双馈风力发电机(DFIG)、直流双向升/降压变换器、超级电容储能单元模型的基础上，对一个由3台具有超级电容储能的DFIG(SCESS-DFIG)组成的风电场进行仿真分析。通过在具有相同额定参数、不同风速曲线给定、不同的超级电容初始电压的运行状态下的模拟，验证所提控制策略的有效性。 |
| 关键词: 双馈风力发电机 超级电容 风电功率波动 电压反馈 能量管理 变桨控制 协调控制 |
| DOI：10.16081/j.issn.1006-6047.2018.09.016 |
| 分类号:TM614 |
| 基金项目:黑龙江省自然科学基金资助项目(E2016031) |
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| Smoothing control method of wide time scale power fluctuation for SCESS-DFIG power generation system |
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SUN Dongyang, SUN Lizhi, WU Fengjiang
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School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| In order to smooth the power fluctuation caused by high penetrations of wind power in a wide time scale, an approach combining the variable pitch control with super-capacitor energy storage power control is proposed. The super-capacitor is employed to enable bidirectional regulation of the wind farm active power fluctuation in a rapid and accurate way, and consequently the short time scale fluctuation of the output power is effectively controlled. The power redundancy is obtained using the load reduction variable pitch control. The auxiliary power adjustment will be triggered when the super-capacitors’ voltage violates the voltage limit, which can not only optimize the energy mana-gement of super-capacitors, but also achieve the wide time scale power fluctuation suppression. Based on the model establishment of DFIG(Doubly-Fed Induction Generator),DC bidirectional up/down converter and super-capacitor energy storage unit, a wind farm composed of three SCESS-DFIGs(DFIGs with Super-Capacitor Energy Storage System) is simulated. Based on the simulation of the operating conditions with the same rated parameters, different wind speed curves, and different super-capacitor initial voltages, the validity of the proposed control strategy is verified. |
| Key words: DFIG super-capacitor wind power fluctuation voltage feedback energy management variable pitch control coordinated control |
