In the traditional reactive power compensation method in the substation system, when the reactive load is large or the power factor is low, the reactive capacity is increased by investing in capacitors. The main purpose is to increase the power of the substation system under the condition of satisfying the voltage. factor, thereby reducing line loss. However, when the substation is in low load operation, there will be a dilemma. Case 1, due to the relatively large reactive power, the power factor is low. Case 2, when we put in a group of capacitors, due to the relatively large capacity of the capacitor group, overcompensation often occurs, so that the power factor cannot be improved, and the template for reducing line loss has not been reached. In order to solve the contradiction caused by the problem, a group of adjustable magnetic control reactors can be connected to each section of 10KV bus. The reactive power of the system is minimized, and the power factor can be improved to the greatest possible extent.
1. Use an independent device to realize dynamic reactive power compensation regulation
When we implement dynamic reactive power compensation control in the substation, it is difficult to bypass the implementation of reactive power compensation controller and related control facilities. It mainly realizes its purpose with the coordination of reactive power compensation controller and related supporting equipment. In a nutshell, the reactive power compensation controller has a certain data collection function, which can collect data inside the substation, such as the voltage of a common 10KV substation, the reactive power of the main transformer, capacitors, tap-changers, etc. to implement automatic control . In this case, usually other systems inside the substation will automatically control the devices and components, and the processing status is closed or disconnected.
2. The dynamic reactive power compensation device can realize dynamic reactive power compensation regulation by cooperating with the integrated self-system in the station
The reactive power compensation controller of the dynamic reactive power compensation method realizes the control of the main transformer gear and the switch of the capacitor through the comprehensive automatic system in the station, and the penalty angle of the reactor is still controlled by the reactive power compensation controller through the thyristor trigger to control. The 10KV voltage in the station, the active and reactive power of each main transformer, the gear position of the main transformer, and the switch position of the capacitor are sent from the integrated system to the reactive power compensation controller, and the reactive power compensation controller sends the result to the integrated system after logical judgment. Execute from the system. When this control method is adopted, a blocking function for the remote adjustment of the main transformer gear position and the remote control of the capacitor switch must be set between the reactive power compensation air and the dispatching automation system, and only one party can control it at the same time. When the reactive power compensation controller is put into closed-loop operation, it will automatically block the remote and local control functions of the dispatch automation system for the main transformer and capacitor.
Post time: Apr-13-2023