周金辉,盛晔,苏义荣,刘浩军,陈铭
ZHOU Jinhui,SHENG Ye,SU Yirong,LIU Haojun,CHEN Ming

• 1:国网浙江省电力有限公司电力科学研究院
• 2:国网浙江省电力有限公司
• 3:国电南瑞科技股份有限公司
• 4:国网浙江海宁市供电有限公司

摘要(Abstract)：

随着分布式光伏大量接入,电压波动问题严重威胁着配电网安全稳定运行。为了改善高渗透率光伏并网后的配电网电压水平,提升系统的调压能力,提出了一种含高比例光伏的配电网电压协调控制策略。该策略通过协调光伏有功和无功,以及变压器OLTC实现配电网的电压协调控制。对光伏出力比较大的高、中压配电网,使用基于PI控制器的有功控制;对于光伏出力较小的低压配电网,采用无功控制方法保证母线电压处于允许偏移范围;此外,将调整OLTC的分接头作为一种后备调节方式。算例的仿真结果验证了所提控制策略可以明显改善配电网电压水平。
With the massive access of distributed photovoltaics, voltage fluctuations seriously threaten the safe and stable operation of distribution networks. In order to improve the voltage level of the distribution network with integration of high-permeability photovoltaics and enhance the voltage regulation capability of the system,a coordinated voltage control strategy for the distribution network with high proportion photovoltaics is proposed. This strategy coordinates the active and reactive power of photovoltaics, and the transformer OLTC to realize the coordinated voltage control of the distribution network. For high-voltage and medium-voltage distribution networks with large photovoltaics output, active control based on PI controllers is used; for low-voltage distribution networks with small photovoltaics output, reactive power control methods are used to ensure that the bus voltage is within the allowable offset range; besides, OLTC tap adjustment is taken as a backup adjustment method. The simulation results of the example verify that the proposed control strategy can significantly improve the voltage level of the distribution network.

关键词(KeyWords)： 高渗透率光伏;有功控制;无功控制;有载调压分接开关;协调控制
high-permeability photovoltaics;active power control;reactive power control;OLTC;coordinated control

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目(5211DS17002M)

作者(Author): 周金辉,盛晔,苏义荣,刘浩军,陈铭
ZHOU Jinhui,SHENG Ye,SU Yirong,LIU Haojun,CHEN Ming

DOI: 10.19585/j.zjdl.201804002

参考文献(References)：

• [1]刘健,黄炜.分布式光伏电源与负荷分布接近条件下的可接入容量分析[J].电网技术,2015,39(2):299-306.
• [2]蔡永翔,唐巍,徐鸥洋,等.含高比例户用光伏的低压配电网电压控制研究综述[J].电网技术,2018,42(1):220-229.
• [3]ALAM M J E,MUTTAQI K M,SUTANTO D.A multimode control strategy for VAr support by solar PV inverters in distribution networks[J].IEEE Tra-nsactions on Power Systems,2015,30(3):1316-1326.
• [4]刘科研,何开元,盛万兴.基于协同粒子群优化算法的配电网三相不平衡状态估计[J].电网技术,2014,38(4):1026-1031.
• [5]FEKETE K,KLAIC Z,MAJDANDZIC L.Expansion of the residential photovoltaic systems and its harmonic impact on the distribution grid[J].Renewable Energy,2012(43):140-148.
• [6]LIN CHENG.Miutigating Voltage Problem in Distribution System With Distributed Solar Generation Using Electric Vehicles[J].IEEE Transactions on Sustainable Energy,2015,6(4):1475-1484.
• [7]CHOI J H,KIM J C.Advanced voltage regulation method of power distribution systems interconnected with dispersed storage and generation systems[J].IEEE Transactions on Power Delivery,2001,16(2):329-334.
• [8]杨素琴,罗念华,韩念杭.分布式电源并网动态无功优化调度的研究[J].电力系统保护与控制,2013,41(17):122-126.
• [9]MAJUMDER R.Aspect of power stability and reactive power support in active distribution[J].IET Generation,Transmission and Distribution,2014,8(3):442-450.
• [10]PEDERSEN R,SLOTH C,ANDRESEN G B,et al.Di SC-A Simulation Framework for Distribution System Voltage Control[J].2014.
• [11]MORF H.A stochastic solar irradiance model adjusted on the Angstro¨m-Prescott regression[J].Solar Energy,2013,87:1-21.