A Coordination Control Strategy of Interline Power Flow Controller in Carbon Peaking and Carbon Neutrality

doi:10.16183/j.cnki.jsjtu.2021.321

Abstract

Abstract:

The goal of “carbon peaking and carbon neutrality” puts forward higher requirements for low-carbon operation of power system considering security and stability. The large-scale access of new energy easily leads to problems such as uneven distribution of power flow and electromechanical oscillation. As the representative device of the third-generation flexible AC transmission system (FACTS), interline power flow controller (IPFC) is greatly capable of power flow control, damping control and transient stability control, but the main objectives of IPFC vary considerably under different working conditions, and there is contradiction between the goals. First, based on the improved relative gain matrix (MRGA) theory, the system state equation with IPFC was linearized, the interaction between targets was quantitatively analyzed, the superposition position of the additional controller was selected, and the interaction between steady-state control and dynamic control was weakened. Then, for the transient process, combined with fuzzy logic theory, the IPFC multi-objective coordinated controller was designed. Finally, the controller parameters were optimized using the particle swarm algorithm. While improving the transient stability and small disturbance stability, the controller reduced the power flow overshoot during the transient process and enhanced the coordinated control ability of IPFC under different system operating conditions. It was helpful to solve the problems of energy transmission and consumption, safety and stability control caused by the large load, low inertia, and random fluctuations of the power system under the “dual carbon” background.

Key words: interline power flow controller, interaction analysis, coordination control, fuzzy control, particle swarm optimization algorithm

CLC Number:

TM732

CAI Hui, GAO Boyang, QI Wanchun, WU Xi, XIE Zhenjian, HUANG Junhui. A Coordination Control Strategy of Interline Power Flow Controller in Carbon Peaking and Carbon Neutrality[J]. Journal of Shanghai Jiao Tong University, 2021, 55(12): 1608-1618.

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发电机	P_n	X_d	X'_d	X″_d	X_q	X″_q	T'_d₀	T″_d₀	T″_q₀	H
G₁	1.0	1.305	0.296	0.252	0.474	0.243	1.01 s	0.053 s	0.1 s	3.7
G₂	1.2	1.305	0.296	0.252	0.474	0.243	1.01 s	0.053 s	0.1 s	3.7

线路	r₁	l₁×10³	c₁×10⁹	长度/km
ij	0.02546	0.9337	12.74	0.4
ik	0.02546	0.9337	12.74	0.6
il	0.02546	0.9337	12.74	0.5

常规控制目标	常规控制对附加控制影响	附加控制对常规控制影响
主控侧有功	1.0542	1.0437
主控侧无功	0.9773	1.2262
辅控侧有功	1.0544	1.0431
直流侧电压	6.7813	1.3120

偏差微分	偏差
偏差微分	PB	PM	PS	ZR	NS	NM	NB
PB	PB	PB	PB	PM	PM	PS	ZR
PM	PB	PB	PM	PM	PS	ZR	NS
PS	PB	PM	PM	PS	ZR	NS	NM
ZR	PM	PM	PS	ZR	NS	NM	NM
NS	PM	PS	ZR	NS	NM	NM	NB
NM	PS	ZR	NS	NM	NM	NB	NB
NB	ZR	NS	NM	NM	NB	NB	NB