CN202150701U - Reactive compensation control system - Google Patents

Abstract

The utility model discloses a reactive power compensation control system, which comprises a DSP control module, a fast reactive power calculation module, a reactive power optimization distribution module, a man-machine interface control module and an AC A chopper control module, and a continuous reactive power regulation module and a capacitor bank control module sequentially connected to the AC chopper control module, the continuous reactive power regulation module includes an AC-AC converter. The utility model utilizes an AC-AC converter to continuously adjust the voltage on the compensation capacitor to realize continuous adjustment of capacitive reactive power.

Description

A Reactive Power Compensation Control System

technical field

The utility model relates to a reactive power compensation control system.

Background technique

Most loads in the power system consume reactive power. If there is a large amount of reactive power flowing in the power supply line, the power supply capacity of the power grid will not be fully utilized, and a large amount of energy loss will be caused. Therefore, reactive power compensation is a necessary measure for power system energy saving and consumption reduction. At present, inductive loads account for the vast majority of reactive power loads, and the demand for reactive power of these loads is constantly changing, so the main task of reactive power compensators in practical applications is Provides continuously adjustable capacitive reactive power. However, the operation of the existing reactive power compensation device has not been tested for a long time, and the cost is extremely high, and now many applications do not need such a high reactive power compensation speed and accuracy. Power compensation equipment, all of which are power factor controllers + contactors or capacitor bank switching methods controlled by capacitors. The biggest disadvantage of this type of equipment is that frequent switching leads to short service life of capacitors, and continuous reactive power cannot be achieved. compensate. Therefore, how to conveniently and quickly realize the continuous adjustment of capacitive reactive power has become an urgent problem to be solved by people in the industry.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art and provide a reactive power compensation control system, which uses an AC-AC converter to continuously adjust the voltage on the compensation capacitor to realize continuous adjustment of capacitive reactive power.

The technical scheme for realizing the above-mentioned purpose is:

A reactive power compensation control system, comprising a DSP (microprocessor) control module, a fast reactive power calculation module, a reactive power optimization distribution module, a man-machine interface control module and an AC A chopper control module, and a continuous reactive power regulation module and a capacitor bank control module connected in sequence with the AC chopper control module, wherein:

The DSP control module sends a first control signal to the fast reactive power calculation module, a second control signal to the reactive power optimization distribution module, a third control signal to the man-machine interface control module, and receives the The feedback signal of fast reactive power calculation module generates PWM (pulse width modulation) waveform, and sends PWM signal to described AC chopper control module;

The fast reactive calculation module receives the first control signal, calculates the system current and voltage and sends a feedback signal to the DSP control module;

The reactive power optimal allocation module receives the second control signal, and determines the optimal reactive power allocation in the current state;

The man-machine interface control module receives the third control signal, and sets user authority and reactive power control mode;

The AC chopper control module receives the PWM signal, and sends a control instruction to the continuous reactive power adjustment module;

The continuous reactive power adjustment module receives a control instruction, and implements PWM control on the capacitor bank control module.

In the reactive power compensation control system above, the AC chopper control module includes an AC chopper.

In the above reactive power compensation control system, wherein the continuous reactive power adjustment module includes an AC-AC converter.

The beneficial effects of the utility model are: the utility model utilizes an AC-AC converter to continuously adjust the voltage on the compensation capacitor to realize continuous adjustment of capacitive reactive power; meanwhile, it has the characteristics of simple control and easy realization.

Description of drawings

Fig. 1 is a structural block diagram of the reactive power compensation control system of the present invention.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing.

Please refer to Fig. 1, a kind of reactive power compensation control system of the present utility model, comprises DSP control module 1, fast reactive power calculation module 2 connected with DSP control module 1, reactive power optimization distribution module 3, man-machine interface control Module 4 and AC chopper control module 5, and continuous reactive power adjustment module 6 and capacitor bank control module 7 connected in sequence with AC chopper control module 5, wherein,

The AC chopper control module 5 includes an AC chopper (not marked in the figure); the continuous reactive power adjustment module 6 includes an AC-AC converter (not marked in the figure);

In this embodiment, the core control element of the DSP control module 1 is a DSP chip of the type TMS320F28335 manufactured by Texas Instruments (TI). The DSP control module 1 controls the fast reactive power calculation module 2 to calculate the system current and voltage and the current and voltage of the AC chopper module 5 to obtain the reactive power output of each part of the system and the reactive power compensation effect of the system; the DSP control module 1 generates through the control strategy PWM waveform, while controlling the optimal reactive power distribution module 3 to determine the optimal reactive power distribution of the current state by calculating the reactive power that needs to be compensated and the current reactive power distribution that has been invested; the man-machine interface control module 4 receives The control of the DSP control module 1 realizes human-computer interaction, and is used for the setting of user authority and the setting of the reactive power control mode selected by the user, and the determination of the power factor required for control; the AC chopper control module 5 passes through the AC The reactive output power of the chopper, at the same time through the calculation of the output current and voltage, obtains the feedback control of the equipment, ensures the accuracy and speed of PWM control, and realizes the AC-AC converter in the continuous reactive power adjustment module 6 PWM control, so as to control the capacitor bank control module 7 to realize switching of the capacitor bank (not shown in the figure), and complete the required amount of reactive power compensation.

In this embodiment, except for the DSP control module 1, the other modules all select existing and commonly used modules.

To sum up, the reactive power compensation control system of the utility model can continuously adjust the voltage on the compensation capacitor by using the AC-AC converter, and realize the continuous adjustment of capacitive reactive power.

The above-mentioned embodiments are provided for those who are familiar with the field to realize or use the utility model, and those who are familiar with the field can make various modifications or changes to the above-mentioned embodiments without departing from the inventive idea of the present utility model Therefore, the scope of protection of the present utility model is not limited by the above-mentioned embodiments, but should be the maximum scope consistent with the innovative features mentioned in the claims.

Claims (3)

1. A reactive power compensation control system, characterized in that, comprises a DSP control module, a fast reactive calculation module connected respectively with the DSP control module, a reactive power optimization distribution module, a man-machine interface control module and a An AC chopper control module, and a continuous reactive power regulation module and a capacitor bank control module sequentially connected to the AC chopper control module, wherein: The DSP control module sends a first control signal to the fast reactive power calculation module, a second control signal to the reactive power optimization distribution module, a third control signal to the man-machine interface control module, and receives the The feedback signal of the fast reactive power calculation module generates a PWM waveform, and sends the PWM signal to the AC chopper control module; The fast reactive calculation module receives the first control signal, calculates the system current and voltage and sends a feedback signal to the DSP control module; The reactive power optimal allocation module receives the second control signal, and determines the optimal reactive power allocation in the current state; The man-machine interface control module receives the third control signal, and sets user authority and reactive power control mode; The AC chopper control module receives the PWM signal, and sends a control instruction to the continuous reactive power adjustment module; The continuous reactive power adjustment module receives a control instruction, and implements PWM control on the capacitor bank control module. 2. The reactive power compensation control system according to claim 1, wherein the AC chopper control module comprises an AC chopper. 3. The reactive power compensation control system according to claim 1, wherein the continuous reactive power regulation module comprises an AC-AC converter.