A Steady State Reactive Power Coordinated Control Method for Synchronous Condenser and DC Converter Station

Abstract

The invention discloses a steady-state reactive power coordination control method of a synchronous condenser and a DC converter station. Increase the information interconnection channel between the AVC substation of the controller and the DC control and protection system, and set the coordination control parameters in the DC control and protection system and the AVC substation of the controller. With the change of the reactive power compensation required by the DC converter station, the AVC substation of the controller Based on information such as the reactive power exchange volume of the AC and DC system, the station follows the principle of priority action of the filter capacitor bank, subsequent fine-tuning of the controller, undercompensation of the filter capacitor, and late phase compensation of the controller, and issues correction commands for switching of the filter capacitor bank With the reactive power adjustment command of the condenser, the reactive power exchange amount of the AC and DC system is within the capacity of half a group of filter capacitors. The invention can effectively improve the voltage stability level of the DC receiving end power grid. The invention can be based on the on-site control mode of the AVC substation of the controller, and only needs to pay attention to the reactive power exchange amount between the whole DC converter station and the AC and DC system, without the need for global optimization and coordination , the control strategy is simple, the calculation amount is small, and the implementability is strong.

Description

technical field [0001] The invention relates to the technical field of reactive power control in electric power systems, in particular to a steady-state reactive power coordinated control method for a synchronous condenser and a DC converter station. Background technique [0002] With a large number of UHV DC projects put into operation, in order to meet the needs of DC power consumption and peak shaving in the AC power grid at the receiving end, the scale of conventional units in the region is gradually reduced, the dynamic reactive power support capacity of the system is weakened, and the voltage stability margin is continuously reduced. , especially for the weak receiving end power grid, the system voltage instability caused by AC fault has become the main factor that threatens the safe and stable operation of the power grid. [0003] In response to the impact of severe faults on the power grid, corresponding measures can be carried out from two aspects: emergency control...

AI Technical Summary

Problems solved by technology

The synchronous condenser is mainly used to provide dynamic reactive power support. Although it is connected to the AVC (Automatic Voltage Control, automatic voltage control) system for unified deployment, it will not participate in the steady-state voltage regulation of the system in principle. Effort is zero

Images