POWER CONVERSION DEVICE FOR CONNECTION TO GRID

Provided is a power converter not using a PLL circuit for use in detecting a system frequency and capable of continuous operation regardless of a variation in system voltage or frequency. The power converter includes: a power conversion unit (3) configured to convert DC power inputted thereto into A...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SAKIMOTO, Kenichi, SUGIMOTO, Kazushige, SHINDO, Yuji
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BLASTING CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER SYSTEMS FOR STORING ELECTRIC ENERGY WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Provided is a power converter not using a PLL circuit for use in detecting a system frequency and capable of continuous operation regardless of a variation in system voltage or frequency. The power converter includes: a power conversion unit (3) configured to convert DC power inputted thereto into AC power; and a control unit (12) configured to control the power conversion unit 3 such that the power conversion unit (3) operates as a virtual synchronous generator. The control unit (12) includes: an AVR model unit (70) configured to perform arithmetic operation to obtain an induced voltage of the virtual synchronous generator; a governor and driving source model unit (80) configured to perform arithmetic operation to obtain a driving torque driving the virtual synchronous generator; a power generation torque arithmetic operation unit (40) configured to perform arithmetic operation to obtain a power generation torque of the virtual synchronous generator; a rotation angle arithmetic operation unit (50) configured to perform arithmetic operation based on at least an acceleration torque and inertia of a rotor of the virtual synchronous generator to obtain a rotation angle of the rotor; a voltage d-q conversion unit (60) configured to perform arithmetic operation with use of the rotation angle of the rotor to obtain a d-axis component and a q-axis component of an output voltage; and a generator model unit (30) configured to perform arithmetic operation, with use of an algebraic expression that is specified by a phasor diagram representing a relationship among an induced voltage, a phase voltage, and a line current of a synchronous generator, to obtain a d-axis current command value and the q-axis current command value corresponding to a d-axis component and a q-axis component of an armature current of the virtual synchronous generator.