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1.电力电子节能与传动控制河北省重点实验室(燕山大学),河北省秦皇岛市 066004
2.国网冀北电力有限公司廊坊供电公司,河北省廊坊市 065000
3.国网冀北电力有限公司智能配电网中心,河北省秦皇岛市 066000
付利达(1999—),男,硕士研究生,主要研究方向:新能源并网调压技术。E-mail:15515120559@163.com
贾清泉(1970—),男,教授,博士生导师,主要研究方向:分布式发电并网技术、电网电能质量分析。E-mail:jiaqingquan@sina.com
孙玲玲(1987—),女,博士研究生,主要研究方向:虚拟电厂分布式资源聚合与调控技术。E-mail:linglingwudi@126.com
收稿:2024-08-12,
修回:2025-01-13,
网络出版:2025-02-19,
纸质出版:2025-06-25
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付利达,贾清泉,孙玲玲等.构网/跟网型光伏逆变器混联的配电网有功无功双层调压策略[J].电力系统自动化,2025,49(12):171-183.
FU Lida,JIA Qingquan,SUN Lingling,et al.Bi-level Voltage Regulation Strategy for Active and Reactive Power of Distribution Network with Hybrid Grid-forming/Grid-following Photovoltaic Inverters[J].Automation of Electric Power Systems,2025,49(12):171-183.
付利达,贾清泉,孙玲玲等.构网/跟网型光伏逆变器混联的配电网有功无功双层调压策略[J].电力系统自动化,2025,49(12):171-183. DOI: 10.7500/AEPS20240812002.
FU Lida,JIA Qingquan,SUN Lingling,et al.Bi-level Voltage Regulation Strategy for Active and Reactive Power of Distribution Network with Hybrid Grid-forming/Grid-following Photovoltaic Inverters[J].Automation of Electric Power Systems,2025,49(12):171-183. DOI: 10.7500/AEPS20240812002.
分布式光伏渗透率的不断提高加剧了电压越限风险。构网/跟网型逆变器混联并网的情况下,如何协调构网/跟网型设备和传统设备调节配电网电压成为重要问题。考虑构网/跟网型设备的不同调节特性,提出一种多类型设备协同调压方法。首先,根据节点电气距离选取出构网型设备最优配置节点,在此类节点配置构网型设备,建立起构网/跟网型设备混联的配电网调压模型;其次,考虑短时间尺度下的调压需求,计算极端场景下构网型光伏逆变器的备用容量,留取一定无功裕量;然后,在日前阶段考虑配电网有功无功耦合特性,构建有功无功双层优化模型,通过有功无功协调优化来降低系统运行成本和电压偏差;最后,通过Fisher最优分割法对离散设备进行动态无功优化,得到最优动作时间和挡位,有效降低了离散设备的动作次数。仿真结果表明,该方法具有良好的电压控制效果和经济性。
The voltage overlimit risk intensifies the continuous increase in the penetration rate of distributed photovoltaics. In the case of hybrid grid connection of grid-forming/grid-following inverters
how to coordinate the grid-forming/grid-following equipment and traditional equipment to regulate the voltage of distribution network has become an important issue. Considering different regulation characteristics of grid-forming/grid-following equipment
a collaborative voltage regulation method for multi-type devices is proposed. Firstly
the optimal configuration node for the grid-forming equipment is selected based on the electrical distance between nodes
and the grid-forming equipment at such nodes is configured to establish a voltage regulation model for the distribution network with hybrid grid-forming/grid-following equipment. Secondly
considering the voltage regulation demand on a short time scale
the reserve capacity of grid-forming photovoltaic inverters in extreme scenarios is calculated to leave a certain reactive power margin. Then
in the day-ahead stage
considering the coupling characteristics of active and reactive power in the distribution network
a bi-level optimal model of active and reactive power is constructed to reduce system operating costs and voltage deviations through coordinated optimization of active and reactive power. Finally
by using the Fisher optimal segmentation method to dynamically optimize the reactive power of discrete equipment
the optimal action time and tap are obtained and the number of actions of discrete equipment is effectively reduced. The simulation results indicate that the method has good voltage-control effect and economy.
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