Engineering test system for the performance of a new type photovoltaic inverter involved in power grid

doi:10.3969/j.issn.1674-1951.2021.09.003

Abstract

Abstract:

Since the conventional test method and test system for photovoltaic inverters cannot comprehensively evaluate the performance of inverters,a new engineering test system for the performance of photovoltaic inverters involved in power grid is proposed.By adding indicators such as site selection of power stations and access points and economic benefits,the applicability and performance evaluation capability of the method has been improved,making up the shortcomings of the original evaluation method which only assesses conventional test indicators such as power output characteristics,power quality,safety performance and system efficiency.The method not only meets the requirements of PV inverters'engineering application and test items of grid-connected standards for photovoltaic power stations,but also provides a comprehensive evaluation for the performance of a new type photovoltaic inverter involved in power grid.The onsite engineering test results of three types of silicon carbide（SiC） based PV inverters verifies the feasibility and effectiveness of the proposed test system for the performance of the new photovoltaic inverter involved in power grid.

Key words: PV inverter, grid related operation performance, SiC power electronic device, onsite engineering test, carbon neutrality, coordination of generation-network-load

CLC Number:

TM76

SU Xiaoling, YANG Jun, GAN Jiatian, LI Zhengxi, SI Yang, GAO Mengyu. Engineering test system for the performance of a new type photovoltaic inverter involved in power grid[J]. Huadian Technology, 2021, 43(9): 23-30.

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References 25

[1]	陈国平, 李明节, 许涛, 等. 关于新能源发展的技术瓶颈研究[J]. 中国电机工程学报, 2017, 37(1):20-26.
	CHEN Guoping, LI Mingjie, XU Tao, et al. Study on technical bottleneck of new energy development[J]. Proceedings of the CSEE, 2017, 37(1):20-26.
[2]	马进, 赵大伟, 钱敏慧, 等. 大规模新能源接入弱同步支撑直流送端电网的运行控制技术综述[J]. 电网技术, 2017, 41(10):3112-3120.
	MA Jin, ZHAO Dawei, QIAN Minhui, et al. Reviews of control technologies of large-scale renewable energy connected to weakly-synchronized sending-end DC power grid[J]. Power System Technology, 2017, 41(10):3112-3120.
[3]	YAO M Q, CAI X. An overview of the photovoltaic industry status and perspective in China[J]. IEEE Access, 2019, 7:181051-181060. doi: 10.1109/Access.6287639
[4]	SU X L, ZHAO Z K, SI Y, et al. Adaptive robust SMC-based AGC auxiliary service control for ESS-integrated PV/wind station[J]. Complexity, 2020(2):1-10.
[5]	孙骁强, 刘鑫, 程林, 等. 基于多调频资源协调控制的西北送端大电网新能源快速频率响应参数设置方案[J]. 电网技术, 2019, 43(5):1760-1765.
	SUN Xiaoqiang, LIU Xin, CHENG Lin, et al. Parameter setting of rapid frequency response of renewable energy sources in northwest power grid based on coordinated control of multi-frequency regulation resources[J]. Power System Technology, 2019, 43(5):1760-1765.
[6]	马晓伟, 徐海超, 刘鑫, 等. 适用于西北送端大电网新能源场站快速频率响应功能的入网试验方法[J]. 电网技术, 2020, 44(4):1384-1391.
	MA Xiaowei, XU Haichao, LIU Xin, et al. A test method for fast frequency response function of renewable energy stations in northwest power grid[J]. Power System Technology, 2020, 44(4):1384-1391.
[7]	KARKI S, ZIAR H, KOREVAAR M, et al. Performance evaluation of silicon-based irradiance sensors versus thermopile pyranometer[J]. IEEE Journal of Photovoltaics, 2021, 11(1):144-149. doi: 10.1109/JPHOTOV.5503869
[8]	FGW. Technical guidelines for power generationg units:Part 3 determination of electrical characteristics of power generating units connected to medium voltage,high voltage,high voltage and extra high voltage grids[S]. Germany, 2010:1-56.
[9]	FGW. Technical guidelines for power generationg units:Part 4 demands on modeling and validating simulation models of the electrical characteristics[S]. Germany, 2010:1-66.
[10]	光伏发电系统模型及参数测试规程:GB/T 32892—2016[S]. 北京: 中国标准出版社, 2016.
[11]	IEC. Utility-interconnected photovoltaic inverters-test procedure of islanding prevention measures:IEC 62116—2008[S]. Switzerland, 2008.
[12]	IEEE. IEEE standard conformance test procedures for equipment interconnecting distributed energy resources with electric power systems and associated interfaces:IEEE 1547.1—2020[S]. USA, 2020:1-282.
[13]	UL. Inverters,converters,controllers and interconnection system equipment for use with distributed energy resources:UL 1741—2001[S]. USA, 2001:1-174.
[14]	VDE. Automatic disconnection device between a generator and the public low-voltage grid:VDE0126-1-1[S]. Germany, 2006:1-15.
[15]	CENELEC. Overall efficiency of grid connected photovoltaic inverters:BS EN 50530—2010[S]. Belgium, 2010:1-40.
[16]	钱照明, 张军明, 盛况. 电力电子器件及其应用的现状和发展[J]. 中国电机工程学, 2014, 34(29):5149-5161.
	QIAN Zhaoming, ZHANG Junming, SHENG Kuang. Status and development of power semiconductor devices and its applications[J]. Proceedings of the CSEE, 2014, 34(29):5149-5161.
[17]	陈清, 郭培育, 周晴, 等. 集中式光伏发电站设备选型要点[J]. 华电技术, 2020, 42(12):78-81.
	CHEN Qing, GUO Peiyu, ZHOU Qing, et al. Key points to equipment selection for a centralized photovoltaic power station[J]. Huadian Technology, 2020, 42(12):78-81.
[18]	李艳红, 王兴兴. 光储充综合能源系统设计及优化[J]. 华电技术, 2019, 41(11):76-79.
	LI Yanhong, WANG Xingxing. Design and optimization of solar energy storage and charging in integrated energy systems[J]. Huadian Technology, 2019, 41(11):76-79.
[19]	ANTHON A, ZHANG Z, ANDERSEN M A E, et al. The benefits of SiC mosfets in a T-Type inverter for grid-tie applications[J]. IEEE Transactions on Power Electronics, 2017, 32(4):2808-2821. doi: 10.1109/TPEL.2016.2582344
[20]	AHMED M H, WANG M, HASSAN M A S, et al. Power loss model and efficiency analysis of three-phase inverter based on SiC MOSFETs for PV applications[J]. IEEE Access, 2019, 7:75768-75781. doi: 10.1109/Access.6287639
[21]	SHI Y J, WANG L, XIE R, et al. A 60 kW 3 kW/kg five-level T-Type SiC PV inverter with 99.2% peak efficiency[J]. IEEE Transactions on Industrial Electronics, 2017, 64(11):9144-9154. doi: 10.1109/TIE.2017.2701762
[22]	SHI Y J, WANG L, LI H, et al. Stability analysis and grid disturbance rejection for a 60 kW SiC based filter-less grid-connected PV inverter[J]. IEEE Transactions on Industry Applications, 2018, 54(5):5025-5038. doi: 10.1109/TIA.28
[23]	STEVANOVIC B, SERRANO D, VASIC M, et al. Highly efficient,full ZVS,hybrid,multilevel DC/DC topology for two-stage grid-connected 1 500 V PV system with employed 900 V SiC devices[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2019, 7(2):811-832. doi: 10.1109/JESTPE.6245517
[24]	KHODABANDEH M, AFSHARI E, AMIRABADI M. A single-stage soft-switching high-frequency AC-link PV inverter:Design,analysis,and evaluation of Si-based and SiC-based prototypes[J]. IEEE Transactions on Power Electronics, 2019, 34(3):2312-2326. doi: 10.1109/TPEL.63
[25]	BURKART R M, KOLAR J W. Comparative life cycle cost analysis of Si and SiC PV converter systems based on advanced multi-objective optimization techniques[J]. IEEE Transactions on Power Electronics, 2017, 32(6):4344-4358. doi: 10.1109/TPEL.2016.2599818

参数	逆变器容量/kW
参数	15	30	50
直流侧最大电压/V	1 000	1 000	850
MPPT电压范围/V	380~800	500~850	450~800
直流侧最大电流/A	20	22/30/30	120
额定输出功率/kW	15	30	50
额定输出电压/V	230/380	230/380	230/380
交流侧最大电流/A	22	52	90
工作频率/Hz	50	50	50
功率因数范围	-0.8~0.8	-0.8~0.8	-0.8~0.8
工作温度范围/°C	-25~60	-20~50	-20~50

逆变器容量/kW	逆变器对地绝缘电阻/MΩ
逆变器容量/kW	正母排	负母排
15	2.0	2.0
30	1.8	2.0
50	2.1	2.1

逆变器容量/kW	连接电阻/Ω
15	0.7
30	0.8
50	0.7

测试指标		逆变器容量/kW
测试指标		50	30	15
电压偏差	A相	0.3	0.2	0.3
	B相	0.3	0.2	0.3
	C相	0.2	0.3	0.2
频率偏差		0.132	0.122	0.126
三相电压不平衡度		0.09	0.08	0.09

测试指标		逆变器容量/kW
测试指标		50	30	15
电压偏差/%	A相	1.82	0.91	0.45
	B相	0.91	1.36	0.45
	C相	2.73	2.27	0.68
电压谐波含量与畸变率/%		0.91	0.91	0.92
三相电压不平衡度/%		0.25	0.89	0.28
直流电流分量/mA	A相	432	246	311
	B相	327	258	258
	C相	406	212	297
电压波动与闪变/V	A相	0.212	0.212	0.191
	B相	0.212	0.202	0.193
	C相	0.202	0.212	0.186
功率因数		0.99	0.99	0.99