Collaborative Voltage Regulation Strategy of Distributed Photovoltaic Inverter With Limited Distribution Area Information
In allusion to the practical problems of limited measurement information and insufficient computing resources in low-voltage distribution area,a collaborative voltage regula-tion strategy for active power and reactive power of photovolta-ic inverters was proposed based on voltage sensitivity matrices derived from actual measurement.Firstly,voltage sensitivity matrices of active power and reactive power regulation were obtained by adjusting the photovoltaic output and observing the node voltage shifting.Secondly,considering the capacity and power factor constraint of inverters,a linear optimization mod-el for collaborative voltage regulation of multiple photovoltaic inverters was proposed to maximize the active output and min-imize the reactive output under the premise of ensuring the voltage quality.Finally,a rural distribution area is selected as the study case to verify the effectiveness,control accuracy and calculation speed of the proposed strategy.The results show that by fully utilizing inverter's reactive power regulation capa-city,the proposed strategy can reduce the waste of photovoltaic energy on the basis of accurate voltage regulation of the distri-bution network with relatively fast solving speed,which make it feasible for limited computing resources in real distribution area.
distribution networkdistributed photovoltaic systemvoltage regulationpower adjustmentvoltage sens-itivitylinear optimization
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