计及用户端调节容量的变频空调自适应电压调控策略

doi:10.3969/j.issn.2097-0706.2022.02.004

摘要/Abstract

摘要：

随着分布式新能源的高比例接入以及电动汽车的普及,配电网过电压、欠电压、电压波动等电压质量问题与日俱增。变频空调作为一种常见的柔性负荷,可以改变自身的运行功率为配电网提供电压调节服务,提高配电网的电压质量。然而,利用用户侧资源为配电网提供电压调节服务需要考虑用户侧资源的电压调节容量,为此,提出了一种计及用户端调节容量的变频空调自适应电压调控策略,通过逐步计算各个节点的电压调节功率来控制补偿功率,并建立空调的热电等效模型描述房间热动态变化,评估空调电压调节潜力。为了验证所提出的调控策略的有效性,计及用户端调节容量的变频空调自适应电压调控策略将用于IEEE 33节点配电系统进行配电网电压优化仿真,仿真结果证明所提出的计及用户端调节容量的变频空调自适应电压调控策略,能够保证配电网电压不越限的前提下,减少调节所需的补偿功率,并充分发挥空调的电压调节潜力。

关键词: 电压调节, 空调, 配电网, 新能源并网, 碳中和, 新型电力系统

Abstract:

High penetration access of distributed renewable energy and the popularization of electric vehicles have led to voltage quality problems such as over-voltage, under-voltage and voltage fluctuation in the distribution network. As a common flexible load, the inverter air conditioner （AC） can change its operating power, provide voltage regulation service for distribution network and improve the voltage quality of distribution network. However, it is necessary to consider the voltage regulation capacity on user side as providing voltage regulation service for distribution network. Therefore, an adaptive voltage regulation strategy considering the regulation capacity on user side of inverter AC is proposed. The compensation power is controlled by calculating the voltage regulation result at each node, and the voltage regulation potential of ACs can be evaluated by the AC thermoelectric equivalent model which is established to describe the dynamic characteristics of the indoor temperature. In order to verify the effectiveness of the proposed regulation strategy, the adaptive voltage regulation strategy of inverter ACs will be simulated in an IEEE 33 node distribution system. In the regulation process, the regulation capacity on user side is considered. The simulation results show that the proposed adaptive voltage regulation strategy of inverter ACs can reduce the compensation power required for regulation without over-voltage and under-voltage events,which gives full play to the voltage regulation potential of ACs.

Key words: voltage regulation, AC, distribution network, new energy grid connection, carbon neutrality, new power system

中图分类号:

TK01⁺8

华咏竹, 谢强强, 秦会斌, 邵李焕, 崔佳冬. 计及用户端调节容量的变频空调自适应电压调控策略[J]. 综合智慧能源, 2022, 44(2): 21-28.

HUA Yongzhu, XIE Qiangqiang, QIN Huibin, SHAO Lihuan, CUI Jiadong. Adaptive voltage regulation strategy for inverter air conditioners considering the regulation capacity on user side[J]. Integrated Intelligent Energy, 2022, 44(2): 21-28.

图/表 12

图1

图2

图3

图4

表1

热电等效模型参数

参数	定义	单位	取值范围
$t in$	房间温度	℃	22~26
$t set$	设定温度	℃	22~26
$α$	空调制冷功率方程系数		(-90.72,10.00)
$β$	空调制冷功率方程系数		(3 265.92,800.00)
$γ$	空调制冷功率方程系数		(-4 193.28,800.00)
$μ$	空调制运行率方程系数		(0.007 2,0.000 5)
$ν$	空调制运行率方程系数		(-0.009 6,0.000 5)
$C a$	空气等效热容量	℃/kW	(0.48,0.10)
R	房间等效热阻	kW·h/℃	(8.33,0.10)
$f AC max$	压缩机最大频率	Hz	180

表1

图5

图6

图7

图8

图9

图10

图11

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