基于逆变器直流侧电流控制的微网无幅差控制
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解东(1990),男,硕士研究生,主要从事微电网运行控制的研究;Email:xiedongwumiao@163.com

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国网浙江省电力公司科技项目(SGZJPX00PXJS1500197)


Nonamplitude difference control of microgrid based on DCside current control of inverter
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    摘要:

    在储能系统作为主电源的微网中,储能系统的输出特性直接影响微网的电能质量。当储能系统输出不能快速调节时,将出现微网电能质量不满足要求的问题。传统的V/f控制策略采用无功-电压下垂控制策略,在孤岛运行时存在电压偏移,会影响微网整体的电能质量,且在下垂控制中下垂系数参数选取难免会出现误调节问题。为解决这些问题,该文探讨逆变器直流侧和交流侧电量的关系,在实施储能逆变器控制策略的基础上加入直流电流控制,解决电压偏移以及误调节问题,达到微电网无幅差控制的目的。最后,使用PSCAD软件搭建风光储微网模型进行仿真检验,证明控制策略的有效性。

    Abstract:

    In the microgrid with the energy storage system as the main power source, the output characteristics of the energy storage system directly affect the power quality of the microgrid. When the output of the energy storage system can not be adjusted quickly, the problem occurs that the power quality of the microgrid does not meet the requirements. The traditional V/f control strategy adopts the reactivevoltage droop control strategy. When the island is running, there is a voltage offset, which will affect the overall power quality of the microgrid. And in the droop control, the droop coefficient parameter selection inevitably leads to misadjustment. In order to solve these problems, this paper discusses the relationship between the DC and AC power of the inverter. Based on the implementation of the control strategy of the energy storage inverter, DC current control is added to solve the problem of voltage offset and misadjustment to achieve nonamplitude difference control of microgrid. Finally, the PSCAD software is used to build the wind and solar storage microgrid model for simulation and verification, proving the effectiveness of the control strategy.

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解 东,杨欢红,丁宇涛,王 洁.基于逆变器直流侧电流控制的微网无幅差控制[J].电力科学与技术学报,2020,35(4):107-113. XIE Dong, YANG Huanhong, DING Yutao, WANG Jie. Nonamplitude difference control of microgrid based on DCside current control of inverter[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2020,35(4):107-113.

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  • 在线发布日期: 2020-09-04