Energy Storage Configuration Considering the System Wind Power Reserve Capacity Under High Wind Power Permeability

doi:10.12096/j.2096-4528.pgt.22128

Abstract

Abstract:

The high proportion penetration of the wind power weakens the inertia and frequency regulation capacity of the power system. The energy storage system (ESS) is widely used in the inertia support and frequency regulation of the power grid with the characteristics of rapid response and stable output. Firstly, the rated speed and active power output of the doubly fed induction generator (DFIG) were taken as constraint conditions, and the optimal power reservation coefficient was set based on the rotor overspeed control to divide the wind speed range of the DFIG participating in the system frequency modulation. On this basis, considering the frequency support capacity of the system, a coordinated frequency modulation method of the DFIG and the ESS was proposed. Based on the analysis of the ESS active power output and system steady-state recovery process, the dynamic frequency regulation characteristics of the ESS under the control strategy of the virtual synchronous machine were described, so as to realize the optimal configuration of the control parameters of the ESS under different working conditions and different support requirements. Simulation results show that the proposed method can make full use of the frequency modulation capacity of the DFIG while ensuring the frequency modulation requirements of the system, optimize the configuration results of the ESS parameters, realize the smooth output of the ESS, and improve the frequency support ability of the system.

Key words: wind power generation, energy storage system, doubly fed induction generator, rotor overspeed control, virtual synchronous generator, power reserve coefficient

CLC Number:

TK 8

Hongbo LIU, Yongfa LIU, Yang REN, Li SUN, Shencheng LIU. Energy Storage Configuration Considering the System Wind Power Reserve Capacity Under High Wind Power Permeability[J]. Power Generation Technology, 2024, 45(2): 260-272.

Figures/Tables 19

Fig. 1 Cp characteristic curve

Fig. 2 Principle diagram of rotor overspeed control

Fig. 3 Block diagram of rotor overspeed control

Fig. 4 Control block diagram of the ESS

Fig. 5 Block diagram of voltage and current double-closed-loop control

Fig. 6 12 bus power system

Fig. 7 Frequency response of the system upon load mutation

Fig. 8 Maximum unbalanced power that the system can bear under different operating conditions

Tab. 1 Different working conditions of the system

运行工况	最大不平衡功率Δ P_sysm/MW	功率波动 Δ P/MW	风速范围 v/(m/s)
工况1	Δ P_G	Δ P<Δ P_sysm1	任意风速
工况2	Δ P_G+Δ P_ESS	Δ P_sysm1<Δ P<Δ P_sysm2	v>11、 v<7
工况3	Δ P_G+Δ P_wind	Δ P_sysm1<Δ P<Δ P_sysm3	7< v<11
工况4	Δ P_G+Δ P_wind+Δ P_ESS	Δ P_sysm3<Δ P<Δ P_sysm4	7< v<11

Fig. 9 Frequency response of the system under different Dv(example 1)

Fig. 10 Changing trend of Trec and Zamp at different Dv (example 1)

Fig. 11 Frequency response of the system under different Hv(example 2)

Fig. 12 Changing trend of Trec and Zamp at different Hv(example 2)

Fig. 13 Frequency response of the system under different Kv

Fig. 14 Frequency response of the system under different Dv(example 4)

Fig. 15 Changing trend of Trec and Zamp at different Dv(example 4)

Fig. 16 Frequency response of the system under different Hv(example 5)

Fig. 17 Changing trend of Trec and Zamp at different Hv(example 5)

Fig. 18 Flow chart of adaptive control of ESS control parameters

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