CN201282342Y

CN201282342Y - Wind power generation parallel converter power control system

Info

Publication number: CN201282342Y
Application number: CNU2008201725855U
Authority: CN
Inventors: 何洪臣; 李瑞来; 胡顺全
Original assignee: Shandong Xinfeng Photoelectric Science & Technology Development Co Ltd
Current assignee: Shandong Xinfengguang Electronic Technology Development Co., Ltd.
Priority date: 2008-10-14
Filing date: 2008-10-14
Publication date: 2009-07-29
Anticipated expiration: 2018-10-14

Abstract

The utility model discloses a system for controlling the power of a grid-connected converter for wind power generation. The system comprises a host computer, a singlechip computer controlling the system, power controller units and inverter power module units, wherein, an inverter power module unit in each circuit is connected with a power controller unit, thereby forming an independent converter subsystem. The utility model aims to provide an easily feasible power control system adaptable to the demands for a grid-connected device for renewable energy source power generation, which is represented by the wind power generation. The utility model can effectively solve the power control problem with the grid-connected converter, and has the advantages of low investment, reliable operation and stable performance. Moreover, the overall line side harmonic currents meet the requirements of the national standard.

Description

Wind power-generating grid-connected current transformer power control system

Technical field

The utility model relates to the regenerative resource grid-connecting apparatus, relates in particular to wind power generation (abbreviation wind-powered electricity generation) grid-connected converter technical field.

Background technology

At present, the power of wind turbine generator kilowatt rises to several megawatts by hundreds of, rationally effectively control the power of grid-connected converter, following the trail of the wind energy optimum value is the core technology of whole wind-powered electricity generation project, the MW class grid-connected converter of being done both at home and abroad all is the multiple unit parallel way, and the generated output of arbitrary wind-driven generator changes, and energy output is little with energy output when big, how controlling grid-connected converter work, is the key technology point that solves the control of grid-connected converter power.

Summary of the invention

A kind of wind power-generating grid-connected current transformer power control system of the utility model, purpose is exactly in order to satisfy powerful wind-electricity integration device technique demand, propose a kind of current transformer power control system of simple possible, can solve the power control problem of grid-connected converter effectively.

A kind of wind power-generating grid-connected current transformer power control system structure described in the utility model is: comprise host computer, system's control single chip computer, power controller unit and inverter power module unit, the inverter power module unit on each road connects a power controller unit, constitutes one group of independently current transformer subsystem.According to the size that drops into power, determine to use the number of current transformer subsystem.

Above-mentioned wind power-generating grid-connected current transformer power control system advantage is: when the grid-connected converter power control system put into operation, first group of current transformer subsystem at first put into operation.Determine according to the level demand signal of host computer whether next current transformer subsystem puts into operation again after the operation, when power output surpassed the rated power of first group of current transformer subsystem, second group of current transformer subsystem began to put into operation, and the like.When power output is low, when the given power signal of host computer, successively decrease successively again.Therefore, under the control of host computer level demand signal, can increase or reduce the operation group number of current transformer subsystem flexibly successively.That is to say that when second group of current transformer put into operation, the size of its power output should be the outer redundance of first group of current transformer rated power.When the 3rd group of current transformer put into operation, the size of its power output should be the outer redundance of first and second group current transformer rated power.When its external power reduces, disconnect the corresponding subsystem group of current transformer number successively in this ratio.

Description of drawings

Fig. 1 is a kind of grid-connected converter power grid-connection control system circuit block diagram.

Among the figure: 1-host computer, 2-system control single chip computer, 3-power controller unit, 4-inverter power module unit, 5-electrical network;

3-1 and 4-1 represent first group of current transformer subsystem being made up of first power controller unit and first inverter power module unit;

3-2 and 4-2 represent by second power controller unit and second second group of current transformer subsystem that the inverter power module unit is formed;

3-n and 4-n represent by n power controller unit and n the n group current transformer subsystem that the inverter power module unit is formed.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is made specific description.

Fig. 1 is the application's wind-electricity integration current transformer power grid-connection control system circuit block diagram.As can be seen from the figure its concrete structure is: the given signal of host computer 1 transmitted power sends system's control single chip computer 2 to, system's single-chip microcomputer 2 is transported to power controller unit 3 to signal respectively, power controller unit 3 provides power control signal for power model unit 4, and the form that 4 signal transformations that receive in power model unit are power signal is transferred to electrical network 5.Wherein: first power controller unit 3-1 in the power control unit 3 and first inverter power module unit 4-1 in the inverter power module unit 4 constitute first group of current transformer subsystem; Second power controller unit 3-2 in the power control unit 3 and second inverter power module unit in the inverter power module unit 4 4-2 constitute second group of current transformer subsystem, the rest may be inferred, and n power controller unit 3-n in the power control unit 3 and n inverter power module unit 4-n in the inverter power module unit 4 constitute n group current transformer subsystem.

Claims

1, a kind of wind power-generating grid-connected current transformer power control system, it is characterized in that, it comprises host computer, system's control single chip computer, power controller unit and inverter power module unit, and the inverter power module unit on each road connects a power controller unit and constitutes one group of independently current transformer subsystem.