Power compensation control method and apparatus for high-power multi-functional efficient charging system
A power compensation control method and apparatus for a high-power multi-functional efficient charging system. A topology structure of the charging system includes at least two parallel high frequency link matrix converters. The power compensation control method includes: calculating a difference between an input voltage phase of an i th converter and an ideal reference input current phase under a dq two-phase synchronous rotating coordinate system, where i is an odd number; calculating, according to the above difference, a required rotating phase angle of a space current vector of an (i+1) th converter, where by total instantaneous reactive power at input sides of the i th converter and the (i+1) th converter is zero; correspondingly rotating the vector, and judging a sector to which the rotated vector belongs; and generating a corresponding control pulse signal based on the corresponding sector and modulation ratio, so as to act on the (i+1) th converter to realize power compensation.
1. A power compensation control method for a high-power multi-functional efficient charging system, wherein a topology structure of the charging system is constituted by at least two parallel high frequency link matrix converters, and the power compensation control method comprises:
calculating a difference between an input voltage phase of an i th converter and an ideal reference input current phase under a dq two-phase synchronous rotating coordinate system, where i is an odd number;
calculating, according to the above phase difference, a required rotating phase angle of a space current vector of an (i+1) th converter, wherein by the required rotating phase angle, total instantaneous reactive power at input sides of the i th converter and the (i+1) th converter is zero;
correspondingly rotating the space current vector of the (i+1) th converter, and judging a sector to which the rotated space current vector belongs; and
generating a corresponding control pulse signal based on the corresponding sector and modulation ratio, so as to act on the (i+1) th converter to realize power compensation.
2. The power compensation control method for a high-power multi-functional efficient charging system according to claim 1 , wherein according to a transformation matrix through which an abc three-phase static coordinate system is converted into a dq two-phase synchronous rotating coordinate system, the difference between the input voltage phase of the i th converter and the ideal reference input current phase is calculated.
3. The power compensation control method for a high-power multi-functional efficient charging system according to claim 2 , wherein a Phase A of the input voltage of the i th converter is an included angle between a d-axis of the dq two-phase synchronous rotating coordinate system and an a-axis of the abc three-phase static coordinate system.
4. The power compensation control method for a high-power multi-functional efficient charging system according to claim 3 , wherein the included angle between the d-axis of the dq two-phase synchronous rotating coordinate system and the a-axis of the abc three-phase static coordinate system is obtained through phase locking via a phase-locked loop.
5. The power compensation control method for a high-power multi-functional efficient charging system according to claim 1 , wherein a Phase A of the input voltage of the i th converter is an included angle between a d-axis of the dq two-phase synchronous rotating coordinate system and an a-axis of the abc three-phase static coordinate system.
6. The power compensation control method for a high-power multi-functional efficient charging system according to claim 5 , wherein the included angle between the d-axis of the dq two-phase synchronous rotating coordinate system and the a-axis of the abc three-phase static coordinate system is obtained through phase locking via a phase-locked loop.
7. The power compensation control method for a high-power multi-functional efficient charging system according to claim 5 , wherein the control pulse signal is generated based on a method for modulating a bipolar current space vector.
8. The power compensation control method for a high-power multi-functional efficient charging system according to claim 3 , wherein the control pulse signal is generated based on a method for modulating a bipolar current space vector.
9. The power compensation control method for a high-power multi-functional efficient charging system according to claim 1 , wherein the control pulse signal is generated based on a method for modulating a bipolar current space vector.
10. A power compensation control apparatus for a high-power multi-functional efficient charging system, wherein a topology structure of the charging system is constituted by at least two parallel high frequency link matrix converters, and the power compensation control apparatus comprises:
a phase difference calculation module configured to calculate, under a dq two-phase synchronous rotating coordinate system, a difference between an input voltage phase of an i th converter and an ideal reference input current phase, where i is an odd number;
a vector rotating module configured to calculate, according to the above phase difference, a required rotating phase angle of a space current vector of an (i+1) th converter, wherein by the required rotating phase angle, total instantaneous reactive power at input sides of the i th converter and the (i+1) th converter is zero;
a sector judgment module configured to correspondingly rotate the space current vector of the (i+1) th converter, and judge a sector to which the rotated space current vector belongs; and
a pulse modulation module configured to generate a corresponding control pulse signal based on the corresponding sector and modulation ratio, so as to act on the (i+1) th converter to realize power compensation.
11. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 10 , wherein according to a transformation matrix through which an abc three-phase static coordinate system is converted into a dq two-phase synchronous rotating coordinate system, the difference between the input voltage phase of the i th converter and the ideal reference input current phase is calculated.
12. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 11 , wherein a Phase A of the input voltage of the i th converter is an included angle between a d-axis of the dq two-phase synchronous rotating coordinate system and an a-axis of the abc three-phase static coordinate system.
13. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 12 , wherein the included angle between the d-axis of the dq two-phase synchronous rotating coordinate system and the a-axis of the abc three-phase static coordinate system is obtained through phase locking via a phase-locked loop.
14. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 12 , wherein the pulse modulation module generates the control pulse signal based on a method for modulating a bipolar current space vector.
15. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 10 , wherein a Phase A of the input voltage of the it converter is an included angle between a d-axis of the dq two-phase synchronous rotating coordinate system and an a-axis of the abc three-phase static coordinate system.
16. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 15 , wherein the included angle between the d-axis of the dq two-phase synchronous rotating coordinate system and the a-axis of the abc three-phase static coordinate system is obtained through phase locking via a phase-locked loop.
17. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 15 , wherein the pulse modulation module generates the control pulse signal based on a method for modulating a bipolar current space vector.
18. The power compensation control apparatus for a high-power multi-functional efficient charging system according to claim 10 , wherein the pulse modulation module generates the control pulse signal based on a method for modulating a bipolar current space vector.