基于机会约束的主动配电网动态经济调度方法

doi:10.12204/j.issn.1000-7229.2021.04.001

电力建设 ›› 2021, Vol. 42 ›› Issue (4): 1-8.doi: 10.12204/j.issn.1000-7229.2021.04.001

• 配电网智能化感知与供电质量提升关键技术 ·栏目主持唐巍教授· • 上一篇下一篇

基于机会约束的主动配电网动态经济调度方法

何惠清¹, 钱赟¹, 何炳源¹, 何乐彰¹, 王彬², 周哲民²

1.国网江西省电力有限公司上饶供电分公司,江西省上饶市 334000
2.清华大学电机工程与应用电子技术系,北京市 100084

收稿日期:2020-09-02 出版日期:2021-04-01 发布日期:2022-07-27
作者简介:何惠清(1971),男,学士,高级工程师,研究方向为电网运行与控制
钱赟(1973),男,学士,高级工程师,研究方向为电网运行与控制;何炳源(1986),男,学士,工程师,研究方向为配电网建设与运行
何乐彰(1987),男,硕士,高级工程师,研究方向为配电网运检技术
王彬(1984),男,博士,副研究员,研究方向为电网调度自动化和无功电压优化控制
周哲民(1989),男,硕士,工程师,研究方向为电网调度自动化信息系统
基金资助:
国家自然科学基金项目(51725703)

Chance-Constrained Dynamic Economic Dispatch Method for Active Distribution Networks

HE Huiqing¹, QIAN Yun¹, HE Bingyuan¹, HE Lezhang¹, WANG Bin², ZHOU Zhemin²

1. Shangrao Power Supply Branch of State Grid Jiangxi Electric Power Co., Ltd., Shangrao 334000,Jiangxi Province, China
2. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

Received:2020-09-02 Online:2021-04-01 Published:2022-07-27
Supported by:
National Natural Science Foundation of China(51725703)

摘要/Abstract

摘要：

分布式电源在主动配电网中大规模接入后,需要对主动配电网进行动态经济调度,以降低主动配电网整体运行成本。由于可再生能源出力具有随机性和不确定性,主动配电网的动态经济调度面临广泛随机性,这对调度策略的可靠性提出挑战。为此,提出一种基于机会约束的主动配电网动态经济调度模型,该模型考虑了分布式电源出力及负荷预测的不确定性。由于该模型无法被直接求解,文章利用凸松弛原理,将原机会约束模型转化为确定性混合二阶锥规划模型。基于IEEE-33节点系统的算例表明,该模型可有效求解出主动配电网的最优经济调度策略,且电压越限率和线路容量越限率被严格控制在给定的机会约束概率以内。此外,算例结果表明所提出基于机会约束的经济调度方法优于传统确定性经济调度和鲁棒经济调度模型。

关键词: 主动配电网, 动态经济调度, 分布式电源, 机会约束

Abstract:

The integration of large-scale distributed generation requires dynamic economic dispatch to reduce the total operational cost of active distribution networks. With the wide penetration of renewable energy in distribution network, great challenges have been addressed on the accuracy of economic dispatch with the concern of uncertainty. This paper proposes a stochastic dynamic economic dispatch model of active distribution network, in which the uncertainties of distributed generation output and load forecasting are incorporated. This model becomes a chance-constrained optimization problem and cannot be directly solved. In this paper, authors describe a relaxation algorithm to relax it as a deterministic mixed second order cone programming model. Numerical tests on IEEE 33-node distribution network shows that the model can be effectively solved with predefined constraint-violating-rate, and this method outperforms the traditional robust optimization model.

Key words: active distribution network, dynamic economic dispatch, distributed generation, chance constrained

中图分类号:

TM732

何惠清, 钱赟, 何炳源, 何乐彰, 王彬, 周哲民. 基于机会约束的主动配电网动态经济调度方法[J]. 电力建设, 2021, 42(4): 1-8.

HE Huiqing, QIAN Yun, HE Bingyuan, HE Lezhang, WANG Bin, ZHOU Zhemin. Chance-Constrained Dynamic Economic Dispatch Method for Active Distribution Networks[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(4): 1-8.

图/表 9

图1 传输功率约束线性化示意图

Fig.1 Illustration of linearization of transmission capacity constraints

图2 IEEE-33节点测试系统

Fig.2 Modified IEEE-33 test distribution system

表1 燃气轮机耗量特性系数

Table 1 Consumption characteristic coefficients of as turbines

图3 不同节点光伏预测曲线

Fig.3 Forecasting curves of photovoltaic ower at different nodes.

图4 主变及发电机节点的有功出力曲线

Fig.4 Active power output of main substation and generators

图5 光伏电站的有功、无功出力曲线

Fig.5 Active and reactive power output of PVs

图6 一天不同时段配电网各节点电压标幺值

Fig.6 Per unit value of bus voltages in distribution system at ifferent time of a day

表2 不同优化模型结果对比

Table 2 Result comparison for different optimization models

表3 不同约束概率结果对比

Table 3 Result comparison for conditions with different chance probabilities

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基于机会约束的主动配电网动态经济调度方法

Chance-Constrained Dynamic Economic Dispatch Method for Active Distribution Networks

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