An Active Frequency Support Strategy for Costal Wind Farms in East China

doi:10.11930/j.issn.1004-9649.202209011

Abstract

Abstract:

According to the characteristics of transient frequency response of the East China Power Grid under various operation modes, an active frequency support strategy is proposed for coastal wind farms. Through the PSCAD/EMTDC-based electromagnetic transient equivalent model of the East China Power grid, the requirements of the East China power grid on the support capacity of wind farms under different penetration of renewable energy, and the basic rules of collaborative inertia response with conventional synchronous generators are given. The simulation results show that when the penetration of renewable energy in the East China Grid is higher than 30%, the inertia response of wind power plays an obvious role in increasing the frequency nadir of the grid, and with the rapid growth of the capacity of coastal wind farms, it is indispensable for wind turbines to provide active inertia support; the virtual inertia time constant of wind turbines should be set around the physical inertia time constant of the wind turbines; when wind turbines are needed to participate in the primary frequency regulation (PFR), the pitch system control of wind turbines and the PFR control of synchronous generators should be co-optimized to avoid frequency oscillation. This article can provide a useful reference for the power grid operation under high penetration of non-synchronous power sources.

Key words: wind farm, frequency support, inertia response, primary frequency regulation, high penetration

Jianhua LI, Lu CAO, Renxin YANG, Zhenyan DENG, Zheng LI, Xu CAI. An Active Frequency Support Strategy for Costal Wind Farms in East China[J]. Electric Power, 2023, 56(11): 49-58, 112.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202209011

https://www.electricpower.com.cn/EN/Y2023/V56/I11/49

Figures/Tables 17

References 17

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发电机	系统参数	数值
G1	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.3
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
G2和G3	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.5
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
G4	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.6
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
等值G_eq	调节系数(p.u.)	0.092
	惯性时间常数H/s	5.4
	汽轮机再热器时间常数T_RH/s	15.0
	汽轮机HP级功率占比F_HP	0.3

发电机	系统参数	数值
G1	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.3
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
G2和G3	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.5
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
G4	调节系数(p.u.)	0.085
	惯性时间常数H/s	4.6
	汽轮机再热器时间常数T_RH/s	10.0
	汽轮机HP级功率占比F_HP	0.3
等值G_eq	调节系数(p.u.)	0.092
	惯性时间常数H/s	5.4
	汽轮机再热器时间常数T_RH/s	15.0
	汽轮机HP级功率占比F_HP	0.3

场景	非常规电源占比/%	常规机组开机容量/GW	传统直流容量/GW	新能源开机容量/GW
场景	非常规电源占比/%	常规机组开机容量/GW	传统直流容量/GW	光伏	风电
1	30	210	60	20	10
2	50	140	60	40	40
3	70	100	60	100	70

场景	非常规电源占比/%	常规机组开机容量/GW	传统直流容量/GW	新能源开机容量/GW
场景	非常规电源占比/%	常规机组开机容量/GW	传统直流容量/GW	光伏	风电
1	30	210	60	20	10
2	50	140	60	40	40
3	70	100	60	100	70

系统参数		数值
额定容量/MW		2
交流线电压基准值/kV		0.69
直流电压基准值/kV		1.2
直流电容/mF		10
滤波电感/μH		170
滤波电容/μF		466
箱变漏抗/%		10
开关频率/kHz		3
风轮+发电机等效惯性时间常数/s		11