CN202797979U - Automatic reactive compensation system based on power grid dispatching - Google Patents

Abstract

The utility model discloses an automatic reactive power compensation system based on grid dispatching, comprising: a substation monitoring subsystem for obtaining real-time data of grid nodes, a main transformer and a capacitor connected to grid nodes; The automatic voltage control subsystem for the main transformer to perform gear shifting and switching on and off of the capacitor is connected to the substation monitoring subsystem; the power grid dispatching automation subsystem for generating the control instructions according to the real-time data is connected to The automatic voltage control subsystem. The utility model can automatically and timely perform power grid reactive power compensation, and solves the problem of untimely manual operation by a dispatcher.

Description

An Automatic Reactive Power Compensation System Based on Grid Dispatch

technical field

The utility model belongs to the technical field of electric engineering and relates to an automatic reactive power compensation system based on power grid dispatching.

Background technique

When alternating current passes through pure resistance, the electric energy is converted into heat energy, but when it passes through pure capacitive or pure inductive load, it does not do work, that is to say, no electric energy is consumed, which is reactive power. Of course, the actual load cannot be a pure capacitive load or a pure inductive load. It is generally a mixed load, so that when the current passes through them, part of the electric energy does not do work, which is reactive power. At this time, the power factor is less than 1. , in order to improve the utilization rate of electric energy, it is necessary to carry out reactive power compensation. Reactive power compensation, referred to as reactive power compensation, plays a role in improving the power factor of the power grid in the electronic power supply system, reducing the loss of power supply transformers and transmission lines, improving power supply efficiency, and improving the power supply environment. Therefore, the reactive power compensation device is in an indispensable and very important position in the power supply system.

In the existing power system, in the case of reactive power shortage, dispatchers are usually used to manually switch capacitors and gear taps to compensate for reactive power. However, adopting such a method often encounters problems such as untimely detection by substation monitoring personnel due to a large number of monitored substations and untimely handling through remote control and other methods.

Utility model content

The purpose of the embodiment of the utility model is to provide an automatic reactive power compensation system based on power grid dispatching, which can automatically and timely perform reactive power compensation of the power grid, and solve the problem of untimely manual operation by dispatchers.

In order to achieve the above purpose, the utility model provides an automatic reactive power compensation system based on power grid dispatching, including:

Substation monitoring subsystem for obtaining real-time data of grid nodes, main transformers and capacitors connected to grid nodes;

An automatic voltage control subsystem for performing gear adjustments on the main transformer and switching on and off the capacitors according to control instructions, connected to the substation monitoring subsystem;

The power grid dispatching automation subsystem for generating the control instruction according to the real-time data is connected to the automatic voltage control subsystem.

Preferably, in the above-mentioned automatic reactive power compensation system, the automatic voltage control subsystem includes:

A constraint condition module used to set or collect node voltage qualification rate and gate power factor as constraints;

The calculation module for performing online analysis and calculation according to the constraints and the real-time data and generating the control instructions is connected to the constraints module.

Preferably, in the above-mentioned automatic reactive power compensation system, there are multiple substation monitoring subsystems, and each substation monitoring subsystem corresponds to a grid node.

Embodiments of the utility model at least have the following technical effects:

The utility model performs reactive power optimization and compensation on the power grid through the automatic switch-on, retreat and up-down of the capacitor and gear positions, improves the safety of the power grid, stabilizes economic operation, reduces the risk of large-scale power outages caused by voltage collapse accidents, improves the voltage quality of the voltage, and improves the quality of the power grid. Transmission efficiency, minimize line loss.

Description of drawings

Fig. 1 is a structural diagram of an automatic reactive power compensation system according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, specific embodiments will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural diagram of an embodiment of the utility model, as shown in Fig. 1, the embodiment of the utility model provides an automatic reactive power compensation system based on power grid dispatching, including:

A substation monitoring subsystem 110 for obtaining real-time data of grid nodes, connected to main transformers and capacitors of grid nodes;

The automatic voltage control subsystem 120, which is used to raise and lower the gear of the main transformer and switch on and off the capacitor according to the control command, is connected to the substation monitoring subsystem 110;

The grid dispatch automation subsystem 130 for generating the control instruction according to the real-time data is connected to the automatic voltage control subsystem 120 .

Wherein, the automatic voltage control subsystem includes: a constraint condition module for setting or collecting node voltage qualification rate and gate power factor as constraints; for performing online analysis and analysis according to the constraint conditions and the real-time data A calculation module that calculates and generates the control instruction is connected to the constraint condition module.

There are multiple substation monitoring subsystems, and each substation monitoring subsystem corresponds to a grid node. The real-time data embodies real-time information of the power grid.

The control command includes switching on and off of the capacitor and a command to increase or decrease the gear position of the main transformer.

In the utility model, real-time data such as telemetry and remote signaling of each node are collected by the scheduling automation system for online analysis and calculation, and the voltage of each node is qualified and the power factor of the gate is the constraint condition, and then the automatic voltage control (AVC) subsystem carries out the online voltage Reactive power optimization control, automatically realizes the comprehensive optimization goals of the least adjustment times of the main transformer tap changer, the most reasonable capacitor switching, the optimal generator reactive power output, the highest voltage qualification rate and the smallest transmission network loss rate, and finally forms a control command, The automatic closed-loop control of voltage and reactive power optimization is realized through the automatic execution of the scheduling automation system.

As can be seen from the above, the utility model embodiment has the following advantages:

The utility model performs reactive power optimization compensation on the power grid through the automatic switch-on, retreat and up-down of the capacitor and the gear position, improves the safety of the power grid, stabilizes economic operation, reduces the risk of large-scale power outages caused by voltage collapse accidents, improves the voltage quality of the voltage, and improves Transmission efficiency, minimize line loss.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (3)

1. the auto-reactive compensation system based on dispatching of power netwoks is characterized in that, comprising:

The supervisory control of substation subsystem that is used for the real time data of acquisition grid nodes, main transformer and the capacitor of connection grid nodes;

Be used for according to control command described main transformer being carried out the gear lifting and described capacitor being thrown the automatism voltage control subsystem that moves back operation, connect described supervisory control of substation subsystem;

Be used for generating according to described real time data the power network schedule automation subsystem of described control command, connect described automatism voltage control subsystem.

2. auto-reactive compensation according to claim 1 system is characterized in that described automatism voltage control subsystem comprises:

Be used for the constraints module that setting or acquisition node rate of qualified voltage and critical point power factor are used as constraints;

Be used for carrying out on-line analysis and calculating and generating the computing module of described control command according to described constraints and described real time data, connect described constraints module.

3. auto-reactive compensation according to claim 1 system is characterized in that described supervisory control of substation subsystem is a plurality of, the corresponding grid nodes of each described supervisory control of substation subsystem.