CPC H02J 3/00 (2013.01) [H02M 7/5387 (2013.01)] | 5 Claims |
1. A control method for a multi-port magnetic network energy router, the multi-port magnetic network energy router comprising a dual magnetic plate crimped N-winding transformer containing distributed magnetic core columns, and first to Nth full-bridge converters, the dual magnetic plate crimped N-winding transformer comprising first to Nth distributed magnetic core columns, first to Nth power windings, first to second magnetic flux leakage core columns, and first to second magnetic plates, the first to Nth power windings being tightly wound on the first to Nth distributed magnetic core columns, upper ends of the first to Nth distributed magnetic core columns and an upper end of a first magnetic flux leakage core column being connected to a first magnetic plate, and lower ends of the first to Nth distributed magnetic core columns and a lower end of a second magnetic flux leakage core column being connected to a second magnetic plate; and
the control method comprising the following steps of:
S1. calculating equivalent connection inductance Lij of an ith full-bridge converter and of a jth full-bridge converter separately, i=1, 2, . . . , N, j=1, 2, . . . , N, and i≠j,
S2. calculating steady-state control phase shift angles φ1s, . . . , φNs of the first to Nth full-bridge converters respectively on the basis of reference powers of various direct current (DC) sources in a magnetic network energy router,
S3. calculating a power decoupling control matrix H of the magnetic network energy router,
S4. calculating control phase shift angle micro-increments Δφ2, . . . , ΔφN of second to Nth full-bridge converters respectively by a power closed-loop control, and
S5. calculating control phase shift angles φ1, . . . , φN, and controlling the first to Nth full-bridge converters to output square-wave voltages of fifty percent duty cycles with the phase shift angles being φ1, . . . , φN, and ultimately realizing the control of a given power of the magnetic network energy router, wherein
the steady-state control phase shift angles φ1s, . . . , φNs in S2 are calculated by a formula as follows:
![]() where Pi* represents a reference power of an ith DC source, Pi represents an average power of the ith DC source, fs represents switching frequencies of the first to Nth full-bridge converters, and Vdci and Vdcj represent a voltage of the ith DC source and a voltage of a jth DC source, respectively;
the power decoupling control matrix H of the magnetic network energy router in S3 is calculated by a formula as follows:
![]() where φ2s, . . . , φNs represent steady-state control phase shift angles of the second to Nth full-bridge converters;
the control phase shift angle micro-increments Δφ2, . . . , ΔφN being calculated by the power closed-loop control in S4 comprises the following steps of: R1, taking a DC source with a constant voltage and without power control requirements as a first DC source, and
R2. performing real-time sampling and calculating the average power Pi of the ith DC source, comparing Pi with the reference power Pi* of the ith DC source for a difference, and determining Δφ2, . . . , ΔφN by a proportional-integral controller, Δφ2, . . . , ΔφN being calculated by a formula as follows:
Δφi=Kp(Pi+−Ri)+Ki∫(Ri+−Pi)dt,i=2, . . . ,N
where Kp represents a proportionality coefficient of the power closed-loop control, and Ki represents an integral coefficient of the power closed-loop control; and
the control phase shift angles φ1, . . . , φN in S5 are calculated by a formula as follows:
![]() where k=2, . . . , N,
wherein the first to Nth distributed magnetic core columns, the first to second magnetic flux leakage core columns, and the first to second magnetic plates are made of the same soft magnetic material; the first to Nth distributed magnetic core columns have the same cross-sectional areas and lengths; and the first to second magnetic flux leakage core columns have the same cross-sectional areas and lengths, a certain air gap being left between the first and second magnetic flux leakage core columns.
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