计及高比例分布式光伏能源接入的配电网状态估计

doi:10.3969/j.issn.2097-0706.2022.10.002

摘要/Abstract

摘要：

分布式能源具有节能环保、资源丰富、建设简单等优势，被广泛引入到传统配电网中。为保证含分布式能源配电网的安全运行，亟须建立适应分布式能源接入的配电网状态估计方法，以提高状态估计结果的精确度和可靠性。以接入光伏发电（PV）系统的配电网为研究对象。首先，对接入光伏电源的配电网进行数学建模，基于PV较少或不发出无功功率的特点，将PV处理为PQ节点；其次，结合PV系统的特性，提出基于改进加权最小二乘法的配电网状态估计方法。最后，通过IEEE 33节点系统算例分析验证了所提出的计及光伏电源接入的配电网状态估计方法的可行性和有效性。

关键词: 配电网, 状态估计, 分布式能源, 基本加权最小二乘法, 光伏发电系统

Abstract:

Being of energy conservation，environmental protection，rich reservoir，simple construction and other advantages，distributed energy has been widely connected to the power grid.It is urgent to establish a state estimation method with high accuracy and reliability for the power grid with distributed energy，in order to secure the safe operation of the grid.Taking a distribution network connected PV power generation systems as the research object，the model of the network is established.The PV nodes is switched to PQ nodes since PV has less or no reactive power.Then，a state estimation method for the distribution network connected PV systems is proposed based on an improved weighted least square method.Finally，the feasibility and effectiveness of the proposed state estimation method for the distribution network with photovoltaic energy is verified by an IEEE 33-bus system.

Key words: distribution network, state estimation, distributed energy, basic weighted least square method, photovoltaic power generation system

中图分类号:

TK9：TM711X

王义, 杨志伟, 吴坡, 刘明洋, 裴杰才, 李春蕾. 计及高比例分布式光伏能源接入的配电网状态估计[J]. 综合智慧能源, 2022, 44(10): 12-18.

WANG Yi, YANG Zhiwei, WU Po, LIU Mingyang, PEI Jiecai, LI Chunlei. State estimation for the distribution network with high-proportion distributed photovoltaic energy[J]. Integrated Intelligent Energy, 2022, 44(10): 12-18.

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节点编号	PV接入后		PV接入前
节点编号	电压标幺值	电压相角/（°）	电压标幺值	电压相角/（°）
1	1.053 6	0.000 0	1.053 7	0.000 0
2	1.044 6	-0.558 8	1.044 7	-0.560 8
3	1.031 2	-0.493 5	1.031 2	-0.495 0
4	1.024 2	-0.414 9	1.024 3	-0.418 4
5	1.017 5	-0.328 3	1.017 4	-0.334 2
6	1.000 3	-0.336 5	1.000 3	-0.343 2
7	0.997 5	-0.510 8	0.997 5	-0.515 9
8	0.993 8	-0.485 6	0.993 9	-0.490 4
9	0.989 6	-0.534 6	0.989 7	-0.538 2
10	0.986 0	-0.575 4	0.986 0	-0.577 7
11	0.985 4	-0.572 0	0.985 5	-0.574 1
12	0.984 5	-0.568 3	0.984 6	-0.570 3
13	0.981 1	-0.633 0	0.981 2	-0.634 4
14	1.040 5	-0.680 0	1.040 5	-0.696 2
15	1.039 8	-0.704 2	1.039 8	-0.725 2
16	1.039 3	-0.730 8	1.039 2	-0.749 2

节点编号	PV接入后		PV接入前
节点编号	电压标幺值	电压相角/（°）	电压标幺值	电压相角/（°）
1	1.053 8	0.000 0	1.053 7	0.000 0
2	1.044 9	-0.523 1	1.044 7	-0.560 8
3	1.031 5	-0.447 8	1.031 2	-0.495 0
4	1.024 7	-0.355 5	1.024 3	-0.418 4
5	1.018 2	-0.251 8	1.017 4	-0.334 2
6	1.000 3	-0.269 6	1.000 3	-0.343 2
7	0.997 4	-0.470 0	0.997 5	-0.515 9
8	0.993 3	-0.455 8	0.993 9	-0.490 4
9	0.988 6	-0.532 9	0.989 7	-0.538 2
10	0.984 4	-0.600 6	0.986 0	-0.577 7
11	0.983 7	-0.599 6	0.985 5	-0.574 1
12	0.982 7	-0.599 7	0.984 6	-0.570 3
13	0.979 0	-0.688 4	0.981 2	-0.634 4
14	0.977 7	-0.747 6	0.980 0	-0.681 3
15	0.977 1	-0.780 4	0.979 4	-0.706 2
16	0.976 4	-0.804 8	0.978 8	-0.724 8

节点编号	PV接入后		PV接入前
节点编号	电压标幺值	电压相角/（°）	电压标幺值	电压相角/（°）
1	1.054 0	0.000 0	1.053 7	0.000 0
2	1.045 0	-0.549 4	1.044 7	-0.560 8
3	1.031 5	-0.472 6	1.031 2	-0.495 0
4	1.024 5	-0.399 1	1.024 3	-0.418 4
5	1.017 7	-0.318 4	1.017 4	-0.334 2
6	1.000 6	-0.338 9	1.000 3	-0.343 2
7	0.997 7	-0.507 3	0.997 5	-0.515 9
8	0.994 1	-0.475 6	0.993 9	-0.490 4
9	0.989 9	-0.513 0	0.989 7	-0.538 2
10	0.986 1	-0.541 2	0.986 0	-0.577 7
11	0.985 5	-0.535 4	0.985 5	-0.574 1
12	0.984 6	-0.527 0	0.984 6	-0.570 3
13	0.981 0	-0.570 9	0.981 2	-0.634 4
14	0.979 7	-0.607 8	0.980 0	-0.681 3
15	0.979 0	-0.629 2	0.979 4	-0.706 2
16	0.978 3	-0.641 5	0.978 8	-0.724 8

节点编号	PV接入后		PV接入前
节点编号	电压标幺值	电压相角/（°）	电压标幺值	电压相角/（°）
1	1.053 5	0.000 0	1.053 7	0.000 0
2	1.044 6	-0.563 2	1.044 7	-0.560 8
3	1.031 1	-0.498 9	1.031 2	-0.495 0
4	1.024 2	-0.421 5	1.024 3	-0.418 4
5	1.017 4	-0.336 1	1.017 4	-0.334 2
6	1.000 2	-0.340 2	1.000 3	-0.343 2
7	0.997 4	-0.508 4	0.997 5	-0.515 9
8	0.993 9	-0.477 6	0.993 9	-0.490 4
9	0.989 8	-0.513 3	0.989 7	-0.538 2
10	0.986 2	-0.540 1	0.986 0	-0.577 7
11	0.985 7	-0.534 9	0.985 5	-0.574 1
12	0.984 9	-0.527 5	0.984 6	-0.570 3
13	0.981 5	-0.570 0	0.981 2	-0.634 4
14	0.980 3	-0.613 2	0.980 0	-0.681 3
15	0.979 7	-0.633 4	0.979 4	-0.706 2
16	0.979 1	-0.645 3	0.978 8	-0.724 8