Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 31, Issue 3, Pages 2472-2480Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2015.2466435
Keywords
Coordinated optimization; distribution network; forecast error; reactive power capacity; reactive power dispatch
Categories
Funding
- National Natural Science Foundation of China [51377162]
- Engineering and Physical Sciences Research Council (EPSRC), U.K. [EP/L021455/1]
- China Scholarship Council [201406350183]
- Engineering and Physical Sciences Research Council [EP/L021455/1] Funding Source: researchfish
- EPSRC [EP/L021455/1] Funding Source: UKRI
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Reactive power outputs of DGs are used along with capacitor banks to regulate distribution network voltage. However, reactive power capability of a DG is limited by the inverter ratings and real power outputs of the DG. In order to achieve optimal power flow, minimize power losses, and minimize switching of capacitor banks, a day-ahead coordinated dispatch method of reactive power is proposed. Forecast errors of DG real power in every period are used to estimate the probability distribution of DGs reactive power capacity. Considering different output characteristics and constraints of reactive power sources, a dynamic preliminary-coarse-fine adjustment method is designed to optimize DG and shunt compensator outputs, decrease the switching cost, and reduce loss. The preliminary optimization obtains initial values, and multiple iterations between the coarse and fine optimizations are used to achieve a coordinated result.
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