Distribution generation control method adaptive to OLTC (On Load Trap Changer) voltage adjustment mode

Abstract

The invention relates to a distribution generation control method and in particular relates to a distribution generation control method adaptive to an OLTC (On Load Trap Changer) voltage adjustment mode. The distribution generation control method comprises the following steps: measuring voltages of different nodes of a system; checking whether a DG (Distribution Generation) is accessed or not under a condition that the voltage of a node exceeds a limit; if no DG is accessed, performing voltage adjustment in an OLTC voltage adjustment mode directly, and adjusting an OLTC sub-connector to complete voltage adjustment; if the DG is accessed, calculating inactive power which needs to be absorbed by an inverter according to active power emitted from the DG, absorbing the inactive power by the inverter, further checking whether limit exceeding of voltages of different nodes is caused or not, if no limit exceeding is caused, completing voltage adjustment; if limit exceeding is caused, adjusting the OLTC sub-connector to complete voltage adjustment. The control method provided by the invention aims to single DG, fluctuation of a voltage can be reduced, the utilization rate of new energy canbe ensured, meanwhile the method can be very well adaptive to an OLTC voltage adjustment strategy, the upgrading transformation of a power distribution grid can be retarded, and the investment cost can be lowered.

Description

technical field [0001] The invention relates to a distributed power supply control method, in particular to a distributed power supply control method compatible with OLTC voltage regulation mode, which belongs to the technical field of reactive power control of distribution network, and is to rely on reactive power in active distribution network Power control is a control method to weaken the influence of distributed generation (Distributed Generation, DG) output on bus voltage. Background technique [0002] With the access of DG, the multi-source structure of the distribution network has changed the traditional single-source structure, which has different degrees of impact on the distribution network voltage and its control strategy, relay protection, and reliability. The reliable operation of the system poses great challenges. Among them, the problem of voltage rise caused by DG output is particularly prominent. Since my country's distribution network is mostly a radial ...

AI Technical Summary

Problems solved by technology

Although this control method realizes the control of the bus voltage connected to the DG to a certain extent, it has poor adaptability to the traditional OLTC voltage regulation method, and in some cases, the output of the DG must be reduced to achieve regulation. purpose of pressure

The popularization of this control method not only means increasing the learning cost of dispatchers, but also reduces the utilization rate of new energy and damages the income of new energy power plants

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