Voltage-reactive power control method for regional power grid

Abstract

The invention belongs to the field of electric systems, and particularly relates to a voltage-reactive power control method used for a regional power grid. The voltage-reactive power control method carries out practical treatment on an automatic voltage control (AVC) system, and the adjustment to bus voltage and gate power factors, which combines with load forecasting results, meets the inverse voltage regulating principles. The inverse voltage regulation is operated to improve the voltage and the power factors at the load peak, and also is operated to reduce the voltage and the power factors at the load valley peak. The voltage-reactive power control method comprises the following steps of determining the variation trend of short-term system load and ultrashort-term bus load; judging the load variation trend of the AVC system to all the power supply regions; and determining the compression quantity of a gate-reactive control limit and the compression quantity of all side bus control voltage in all the power supply region. The voltage-reactive power control method provided by the invention controls the possible out-of-limit variation in advance according to the power grid operating state and the load variation trend so as to avoid the occurrence of over-limit quantity as far as possible, the qualified rates of bus voltage and gate power factors are fundamentally improved, and the action times of equipment is reduced on the basis.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a voltage and reactive power control method for regional power grids. Background technique [0002] There is a close relationship between voltage and reactive power. In order to maintain the voltage level, the corresponding reactive power must be provided. The resulting voltage and reactive power control problem has always been a technical problem in power system research. Whether the voltage is qualified or not directly affects the safety and economy of the grid operation. Large voltage deviations will not only cause threats and damage to electrical equipment, but may cause voltage collapse and cause large-scale power outages. With the rapid development of the economy and society, the demand for electricity has risen sharply, the structure of the power grid has become more and more complex, and the requirements for power quality have become higher and higher; The highe...

AI Technical Summary

Problems solved by technology

This kind of control mode lags behind the threshold limit and acts as a passive control, which cannot essentially improve the qualified level of bus voltage and gate power factor, and may even cause frequent and repeated adjustments of reactive power equipment due to normal fluctuations in load, affecting equipment and even Grid security

Images