含网电变压器保护的电动修井机超级电容储能控制*

doi:10.11985/2021.02.016

摘要/Abstract

摘要：

针对电动修井机工作时井场变压器承受电流冲击大,严重威胁井场电网的用电安全问题,提出了含网电变压器保护的电动修井机超级电容储能装置控制策略。该策略通过程控模式切换对系统的六种工作模式进行调控。以网电变压器过流保护作为首要控制,实现了容量调节和稳定直流母线电压的控制。既能保证网电变压器的安全,又能吸收电动修井机回馈的能量,实现电能的节约和再利用。基于PSIM仿真平台,完成了电动修井机超级电容储能控制的仿真,验证了所提控制方法的正确性、可行性和有效性。

关键词: 电动修井机, 超级电容, 网电变压器保护, 模式切换

Abstract:

While electric workover rigs runs, the current of grid-connected transformer is usually over its rated current. It is serious to endanger to its safety operating. The control strategy of super capacitor energy storage system with grid-connected transformer protected is proposed. The mode switching is designed to regulate 6 operation modes, which is controlled by program. The over-current protection of grid-connected transformer is thought as the primary control, and the capacity regulating control as well as DC bus voltage stable control are completed. Not only the grid-connected transformer running safety is ensured, but also the workover rigs feedback energy is absorbed quickly. These electric energies are saved and utilized again. Based on the PSIM simulation platform, the proposed control strategy is adopted. The simulation of the super-capacitor energy storage control for electric workover rig is executed. The results verify that the presented control method is correct, feasible and effective.

Key words: Electric workover rig, super capacitor, grid-connected transformer protected, mode switching

中图分类号:

TM561

伍文俊, 王思佳, 蔡嘉齐. 含网电变压器保护的电动修井机超级电容储能控制^*[J]. 电气工程学报, 2021, 16(2): 122-130.

WU Wenjun, WANG Sijia, CAI Jiaqi. Control Strategy for Electric Workover Rig Super Capacitor Energy Storage System with Grid-connected Transformer Protected[J]. Journal of Electrical Engineering, 2021, 16(2): 122-130.

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参数		数值
电动修井机的供电系统	变压器容量S/(kV·A)	50
	二次侧交流侧相电压/V	220
	输入滤波电容C_d/μF	5 000
超级电容储能系统	滤波电感L/mH	1.5
	功率P_sc/kW	80
	超级电容容量/F	44.8
	超级电容内阻/mΩ	19.43
	超级电容电压上限值/V	355
	超级电容电压下限值/V	185
系统控制参数	网侧电流保护值I_s-ref/A	76
	电流充电系数k	0.8
	P_min/kW	1
	直流母线电压下限U_dc-low/V	520
	直流母线电压上限U_dc-up/V	585
	直流母线电压阈值U_dc_-max/V	600
	开关频率/kHz	5