不同渗透率下多种新能源电力系统动态安全域分析

doi:10.12204/j.issn.1000-7229.2022.04.007

电力建设 ›› 2022, Vol. 43 ›› Issue (4): 58-68.doi: 10.12204/j.issn.1000-7229.2022.04.007

• 高比例新能源交直流电网特性分析与运行控制·栏目主持辛业春教授、姜涛教授、吴学光教授、宋晓博士· • 上一篇下一篇

不同渗透率下多种新能源电力系统动态安全域分析

杨金海¹, 武家辉¹(), 王海云¹, 姚磊²

1.新疆大学教育部可再生能源发电与并网控制工程技术研究中心,乌鲁木齐市 830047
2.国网新疆综合能源服务有限公司,乌鲁木齐市 830011

收稿日期:2021-09-03 出版日期:2022-04-01 发布日期:2022-03-24
通讯作者: 武家辉 E-mail:wjha29@sina.com
作者简介:杨金海(1996),男,硕士研究生,主要研究方向为电力系统稳定分析与控制;
王海云(1973),女,硕士,教授,博士生导师,主要研究方向为可再生能源发电与并网技术;
姚磊(1972),男,学士,工程师,主要从事节能及电能代替工作。
基金资助:
新疆维吾尔自治区自然科学基金(2020D01C068)

Dynamic Security Region Analysis of Power System under Different Penetration Rate of New Energy

YANG Jinhai¹, WU Jiahui¹(), WANG Haiyun¹, YAO Lei²

1. Engineering Research Center of Education Ministry for Renewable Energy Power Generation and Grid Control, Xinjiang University, Urumqi 830047, China
2. State Grid Xinjiang Integrated Energy Service Co., Ltd., Urumqi 830011, China

Received:2021-09-03 Online:2022-04-01 Published:2022-03-24
Contact: WU Jiahui E-mail:wjha29@sina.com
Supported by:
Natural Science Foundation of Xinjiang Uygur Autonomous Region(2020D01C068)

摘要/Abstract

摘要：

新能源大规模并网会给电力系统的动态安全稳定带来新影响,因此新能源的安全、稳定、高效利用是能源未来的发展方向之一。不同种类的新能源对电力系统的暂态稳定影响各不相同,采用“域”的分析法能够较好地解决这一问题。首先,提出了基于改进的动态差分进化-内点法(dynamic differential evolution-interior point method,DDE-IPM)进行动态安全域构建和分析,该方法与传统方法相比,具有速度快、误差小、准确率高等优点。其次,在DIgSILENT/PowerFactory进行时域仿真,对故障下不同种类新能源、不同渗透率下系统动态安全域进行校验,并分析系统在不同渗透率下的低电压穿越能力,得出以下结论:在系统各新能源渗透率下,系统的动态安全域超平面具有平行的性质且边界距离与新能源的容量增量成正比;新能源的补偿设备对系统的暂态安全性在一定范围内起到支撑作用,系统的动态安全域有所外扩;系统风电机组和光伏电站均满足并网运行的低电压穿越能力。

关键词: 渗透率, 超平面系数, 时域仿真, 实用拟合, 动态安全域

Abstract:

The large-scale grid-connection of new energy sources will bring new impact on the dynamic safety and stability of the power system, so the safe, stable and efficient utilization of new energy sources is one of the future directions of energy development. Different types of new energy sources have different effects on the transient stability of power systems, and this problem can be better solved by using the “region” analysis method. This paper proposes to construct and analyze the dynamic safety region applying the improved dynamic differential evolution-interior point method (DDE-IPM), which has the advantages of high speed, low error and high accuracy compared with the traditional method. The time-domain simulation in DIgSILENT/PowerFactory calibrates the dynamic safety region of the system under different types of new energy and different penetration rate under fault, and analyzes the low voltage ride-through capability of the system under different penetration rates, and draws the following conclusions: the dynamic safety region hyperplane of the system is parallel in nature and the boundary distance is proportional to the capacity of the new energy under each penetration rate of the system. The compensation equipment of the new energy source supports the transient safety of the system within a certain range, and the dynamic safety region of the system is expanded; both wind power and PV plants of the system have the LVRT capability of grid-connected operation.

Key words: permeability, hyperplane coefficient, time domain simulation, practical fitting, dynamic security region

中图分类号:

TM73

杨金海, 武家辉, 王海云, 姚磊. 不同渗透率下多种新能源电力系统动态安全域分析[J]. 电力建设, 2022, 43(4): 58-68.

YANG Jinhai, WU Jiahui, WANG Haiyun, YAO Lei. Dynamic Security Region Analysis of Power System under Different Penetration Rate of New Energy[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(4): 58-68.

图/表 22

图1 动态安全域示意图

Fig.1 Dynamic security region diagram

图2 安全域超平面系数求解流程

Fig.2 Flow chart for solving hyperplane coefficients in safety region

图A1 改进IEEE118节点测试系统接线

Fig.A1 Improved IEEE 118 node test system wiring diagram

图3 各发电机组故障时有功响应

Fig.3 Active response during failure of each generator set

表1 拟合超平面方程系数

Table 1 Fitting hyperplane equation coefficients

图4 5%渗透率下的DNEP-DSR

Fig.4 DNEP-DSR at 5% penetration rate

图5 50%渗透率下的DNEP-DSR

Fig.5 DNEP-DSR at 50% penetration rate

图B1 10%渗透率下的DNEP-DSR

Fig.B1 DNEP-DSR at 10% permeability rate

图B2 15%渗透率下的DNEP-DSR

Fig.B2 DNEP-DSR at 15% permeability rate

图B3 20%渗透率下的DNEP-DSR

Fig.B3 DNEP-DSR at 20% permeability rate

图B4 25%渗透率下的DNEP-DSR

Fig.B4 DNEP-DSR at 25% permeability rate

图B5 30%渗透率下的DNEP-DSR

Fig.B5 DNEP-DSR at 30% permeability rate

图B6 35%渗透率下的DNEP-DSR

Fig.B6 DNEP-DSR at 35% permeability rate

图B7 40%渗透率下的DNEP-DSR

Fig.B7 DNEP-DSR at 40% permeability rate

图B8 45%渗透率下的DNEP-DSR

Fig.B8 DNEP-DSR at 45% permeability rate

表2 5%渗透率的时域仿真结果

Table 2 Time domain simulation results for 5% penetration rate

表3 不同新能源渗透率下的系统运行指标对比

Table 3 Comparison of system operation indicators under different new energy penetration rate

表4 不同构建动态安全域方法的结果比较

Table 4 Comparison of the results of different methods of constructing dynamic security regions

图6 不同渗透率下DFIG风电场故障电压跌落曲线

Fig.6 Fault voltage dip curves for DFIG wind farms with different penetration rate

图7 不同渗透率下DFIG风电场低电压穿越能力

Fig.7 LVRT capability of DFIG wind farms with different penetration rate

图8 不同渗透率下光伏电站故障电压跌落曲线

Fig.8 Fault voltage dip curves for PV plants with different penetration rate

图9 不同渗透率下光伏电站低电压穿越能力

Fig.9 LVRT capability of PV plants with different penetration rate

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不同渗透率下多种新能源电力系统动态安全域分析

Dynamic Security Region Analysis of Power System under Different Penetration Rate of New Energy

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