考虑多台区互联的中低压交直流混合配电网双层协同优化调度方法

doi:10.12204/j.issn.1000-7229.2024.01.004

电力建设 ›› 2024, Vol. 45 ›› Issue (1): 33-44.doi: 10.12204/j.issn.1000-7229.2024.01.004

考虑多台区互联的中低压交直流混合配电网双层协同优化调度方法

刘科研¹(), 盛万兴¹(), 詹惠瑜¹(), 佟博²(), 张璐²(), 唐巍²()

1.中国电力科学研究院有限公司配电技术中心,北京市 100192
2.中国农业大学信息与电气工程学院,北京市 100091

收稿日期:2022-11-02 出版日期:2024-01-01 发布日期:2023-12-24
通讯作者: 刘科研(1978),男,博士,教授级高级工程师,主要从事配电网运行分析、智能有源配电网故障诊断、配电网大数据分析、配电网仿真等相关的研究工作,E-mail: liukeyan@epri.sgcc.com.cn。
作者简介:盛万兴(1965),男,博士,教授级高级工程师,长期从事配电、分布式发电与微网等方面的研究、开发及管理工作,E-mail: shengwx@epri.sgcc.com.cn;
詹惠瑜(1994),女,硕士,工程师,主要从事配电网数据处理、运行状态分析、故障诊断等方面的研究工作,E-mail: zhanhy@epri.sgcc.com.cn;
佟博(1999),男,硕士研究生,主要研究方向为交直流配电网优化运行不确定性分析与建模,E-mail:tongbo@163.com;
张璐(1990),男,博士,副教授,主要研究方向为交直流混合配电网、电动汽车、配电网恢复力提升技术,E-mail:zhanglu1@cau.edu.cn;
唐巍(1971),女,博士,教授,主要研究方向为智能配电网规划与评估、分布式光伏消纳控制、交直流混合配电网、微电网与综合能源系统,E-mail:wei_tang@cau.edu.cn。
基金资助:
国家电网有限公司总部科技项目“适应新型直流用电的中低压交/直/储混合配电网网架优化和运行协调技术研究”(5400-202112139A-0-0-00)

Bi-level Optimization Scheduling of Mid-Low-Voltage AC/DC Hybrid Distribution Network Considering Interconnection Between Networks

LIU Keyan¹(), SHENG Wanxing¹(), ZHAN Huiyu¹(), TONG Bo²(), ZHANG Lu²(), TANG Wei²()

1. Power Distribution Technology Center, China Electric Power Research Institute, Beijing 100192, China
2. College of Information and Electrical Engineering, China Agricultural University, Beijing 100091, China

Received:2022-11-02 Published:2024-01-01 Online:2023-12-24
Supported by:
Science and Technology Project of State Grid Corporation of China(5400-202112139A-0-0-00)

摘要/Abstract

摘要：

高比例可再生能源的大量接入和新型用电设备的增加,使得配电网逐渐向区域化、网格化转型,中低压交互、多台区互联的交直流混合配电网将成为配电网的发展趋势。鉴于此,提出了考虑多台区互联的中低压交直流混合配电网功率双层协同优化调度方法。以综合成本最小为目标建立交直流低压台区功率优化调度模型,得到各个台区内储能充放电策略和电动汽车V2G(vehicle to grid)策略;以系统综合电压偏差最小、综合运行成本最小为目标,建立中压优化模型,得到互联换流器的交换功率。将上下层结果互相传递迭代优化,直至中压配电网和各个低压台区全部收敛。最后,以改进的IEEE 33节点算例系统对所提方法进行了验证,算例结果表明,所提方法能够有效减小系统网络损耗,平抑电压波动。

关键词: 交直流配电网, 多台区互联, 中低压协同优化, 储能, V2G, 双层迭代优化

Abstract:

With high penetration renewable energy and a new type of accessed load, traditional distribution networks have been gradually transformed into multiconnected networks. AC/DC hybrid distribution networks with multi-voltage level interaction have become the development trend of distribution networks. Based on this trend, a two-layer optimization method for an AC/DC distribution network is proposed, considering multi-connected and different voltage level interactions. The objective function of the low-voltage network problem is to minimize the schedule cost and achieve dispatching of energy storage and EV. The objective function of the mid-voltage problem is to minimize the schedule cost and voltage deviation. Next, the exchange power of the voltage-source converter is obtained. Two issues are iterated and optimized until they reach convergence. Finally, a case study was conducted based on the IEEE33 system. The results show that the proposed method can minimize power loss and voltage fluctuation.

Key words: AC/DC hybrid distribution network, multi-area-connected network, mid-low-voltage-level optimization, energy storage, vehicle to grid (V2G), two-layer optimization

中图分类号:

TM73

刘科研, 盛万兴, 詹惠瑜, 佟博, 张璐, 唐巍. 考虑多台区互联的中低压交直流混合配电网双层协同优化调度方法[J]. 电力建设, 2024, 45(1): 33-44.

LIU Keyan, SHENG Wanxing, ZHAN Huiyu, TONG Bo, ZHANG Lu, TANG Wei. Bi-level Optimization Scheduling of Mid-Low-Voltage AC/DC Hybrid Distribution Network Considering Interconnection Between Networks[J]. ELECTRIC POWER CONSTRUCTION, 2024, 45(1): 33-44.

图/表 18

图1 多台区互联的交直流配电网结构

Fig.1 Structure of multi-area connected AC/DC hybrid distribution network

图2 系统调度框架

Fig.2 System scheduling framework

图3 电压源型换流器结构

Fig.3 Topology of VSC

图4 模型求解流程

Fig.4 Flow chart of model solution

图5 算例拓扑

Fig.5 Topology of case study

图6 光伏和负荷曲线

Fig.6 PV and load curve

表1 台区电价情况

Table 1 Electricity price of courts

图7 储能充放电策略

Fig.7 Energy storage charging and discharging strategy

图8 7号充电桩电动汽车调度方案

Fig.8 EV charging and discharging strategy of No.7 charging station

图9 VSC功率流动情况

Fig.9 Power flow of VSC

表2 不同方案成本对比

Table 2 Comparision of total cost under different cases

表3 中压配电网损耗及电压偏差对比

Table 3 Power loss and voltage deviation of mid-voltage distribution network under different cases

表4 不同方案峰谷差

Table 4 Peak valley difference under different cases

图10 节点电压分布情况

Fig.10 System node voltage

图11 分布式光伏接入情况

Fig.11 PV access capacity

表5 分布式光伏消纳总量

Table 5 PV absorption of different cases

表A1 中压配电网线路参数及基础负荷

Table A1 Line parameters and basic load of medium voltage distribution network

图A1 不同方案电动汽车充放电调度结果

Fig.A1 The schedule results of electric vehicle charging and discharging under different cases

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考虑多台区互联的中低压交直流混合配电网双层协同优化调度方法

Bi-level Optimization Scheduling of Mid-Low-Voltage AC/DC Hybrid Distribution Network Considering Interconnection Between Networks

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