微网逆变器及其并网和离网的控制方法

• Format: Patent
• Language: Chinese
• Published: 06.07.2018
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

本发明公开了种微网逆变器及其并网和离网的控制方法，所述方法如下：支撑微网电压频率的可调度微网逆变器在并网和离网时工作在不同的控制模式，当微网并网或离网运行时，中央控制器控制可调度微网逆变器工作在PQ控制模式、下垂控制模式或虚拟同步发电机控制模式，按照微网中央控制器的要求向大电网输送或者吸收电力；微网在孤岛运行模式时，要求可调度微网逆变器对外表现出电压源特性，可以支撑电网电压频率，主从控制结构的微网中，可调度微网逆变器工作在VF控制模式，在对等控制的微电网中，采用下垂控制或者虚拟同步发电机控制。所述方法能够根据微网实际运行条件控制逆变器工作在不同的控制模式，提高了微电网运行的安全性和可靠性。 The present invention discloses a microgrid inverter and a grid-connected and off-grid control method thereof. The method includes: a dispatchable microgrid inverter supporting a microgrid voltage frequency works in different control modes under grid-connected and off-grid conditions; when the microgrid works under grid-connected or off-grid conditions, a central control unit controls the dispatchable microgrid inverter to work in a PQ control mode, a droop control mode or a virtual synchronous generator control mode, and to transmit electricity to a large power grid or absorb electricity from the large power grid according to requirements of the microgrid central control unit; when the microgrid is in an isolated i