Voltage control method and device for power distribution network provided with distributed power source

Abstract

The invention provides a voltage control method and device for a power distribution network provided with a distributed power source. The method includes the following steps that: the main nodes of each sub power distribution area in the power distribution network are obtained; the sensitivity matrix of the voltages of the main nodes and the power of the sub power distribution areas is determined;and a main node voltage allowable interval is determined, and voltage control is performed on the power distribution network provided with the distributed power source. According to the voltage control method and device of the invention, the optimized scheduling means of the distributed power source is provided; the flexible and efficient utilization of the distributed power source can be realized; a voltage quality requirement of the connection of a large-scale distributed power source into the power distribution network can be satisfied; the main nodes are adopted as the objects of voltagecontrol, so that the amount of calculation data on a global layer is decreased, and calculation efficiency can be effectively improved; and the frequent action of a control system can be avoided; andthe voltage control capability of the power distribution network with the distributed power source is improved; and the operational safety of the power distribution network with the distributed powersource is ensured.

Description

technical field [0001] The invention relates to the technical field of distribution network control, in particular to a distribution network voltage control method and device including distributed power sources. Background technique [0002] Most of the distribution network voltage control methods in the prior art are based on the division of voltage control zones, such as the control based on the nine-zone diagram. The method is to monitor the bus voltage on the low-voltage side of the transformer and the reactive power (or power factor) on the high-voltage side of the transformer in real time, and use this as the control state quantity. and control commands for switching capacitors. Later, the nine-area map in the prior art was improved, and the boundaries were subdivided to obtain the control methods of the thirteen-area map and the seventeen-area map. These control methods are in actual operation. There will be problems such as so-called "oscillating action" or malfunct...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art that cannot realize flexible and efficient utilization of multiple distributed power sources and cannot meet the requirements for system voltage quality of large-scale distributed power sources connected to distribution networks, the present invention provides a distributed The distribution network voltage control method and device of the power supply first divide the distribution network into levels and regions, select main nodes according to the sub-distribution area, then determine the sensitivity matrix of the main node voltage and the power of the sub-distribution area, and finally determine the main nodes. Node voltage allowable range, and according to the main node voltage, the main node voltage allowable range, and the sensitivity matrix of the main node voltage and the power of the sub-distribution area, the voltage control of the distribution network with distributed power supply is provided, which provides an optimal dispatching method for distributed power supply , can realize the flexible and efficient utilization of distributed power, and can meet the requirements of large-scale distributed Power Distribution Network Operation Security

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