Micro-grid system of grid-connected island power grid

Micro-grid system of grid-connected island power grid

  • CN 104,852,404 A
  • Filed: 05/25/2015
  • Published: 08/19/2015
  • Est. Priority Date: 05/25/2015
  • Status: Active Application
First Claim
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1. a micro-grid system for grid type island electrical network, is characterized in that, comprising:

  • Energy-storage system, described energy-storage system is by step-up transformer access island electrical network ac bus;

    Distribution network load system, described distribution network load system comprises customer charge, and customer charge is connected with distribution network load step down side by fast solid-state switches, described distribution network load high voltage side of transformer access island electrical network AC distribution net;

    Diesel generating system, main power source when it is in islet operation as island microgrid system;

    Described diesel generating system comprises diesel generating set A and diesel generating set B, diesel generating set A accesses island electrical network low-voltage network through distribution network load transformer, the ac bus Voltage Stability Control of diesel generating set B when step-up transformer access island electrical network ac bus participates in island electrical network islet operation;

    Wind powered generator system, it comprises asynchronous wind driven generator group, the stator outlet side series connection access back-to-back converter of asynchronous wind driven generator group, to realize low voltage crossing and the Reactive Power Control of conventional asynchronous wind turbine generator, described back-to-back converter outlet side delivers to island electrical network ac bus after boosting;

    Fiber optic communication network, along electric line fiber plant in the electrical network of island, at the preset points installing optical fibres transceiver communication device of electric line, forms island electrical network fiber optic communication network;

    Microgrid energy coordination optimization and control system, it carries out collecting in real time of island operation of power networks data through fiber optic communication network, and assign operation control command to each operational outfit in the electrical network of island, realize island electrical network grid-connected/the double mode stable operation of isolated island, double modely to take over seamlessly.

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