CN104125693A - Substation lighting control system and its control method - Google Patents

Abstract

The invention discloses a transformer substation lighting control system which comprises a lighting control device, a communication device and an upper computer. The lighting control device is connected with the upper computer by the communication device and comprises a microcontroller, a current transformer, a relay and a local control panel, the local control panel is provided with a local locking switch and a rocker switch, the local locking switch, the rocker switch, the relay and a secondary winding of the current transformer are connected with the microcontroller, a primary winding of the current transformer and the relay are serially connected onto a power supply circuit, the power supply circuit comprises a zero line and a phase line, a lamp is serially connected with the zero line, and a single-pole double-throw switch is serially connected with the phase line. The invention further discloses a control method implemented by the transformer substation lighting control system. The transformer substation lighting control system and the control method have the advantages that remote control and local control can be conveniently switched over when the control system is applied, a local double-control function can be conveniently implemented, and the transformer substation lighting control system is convenient to popularize and apply.

Description

Substation lighting control system and its control method

technical field

The invention relates to the field of substation monitoring, in particular to a substation lighting control system and a control method thereof.

Background technique

With the comprehensive promotion of unattended substation management mode, remote real-time video monitoring, remote fault and accident alarm reception and processing can be realized for substations in the monitoring center through the existing power communication network, which can improve the safety and security of substation operation and maintenance. Reliability, and can gradually realize the visual monitoring and scheduling of the power grid, making the control and operation of the power grid safer and more reliable.

Substations are developing in the direction of intelligence and unmanned, which requires remote control of various devices inside the substation, but at the same time, the function of local control is also indispensable. As an important part of the substation, the lighting system provides lighting for maintenance personnel when working in the substation. In order to facilitate control, the lighting system of the traditional substation usually has local dual control functions. The way to turn off the lights on the roof. Nowadays, when realizing the intelligent control of substations, the lighting system is used to provide light supplement support for the cameras in the substation through remote control. The integrated monitoring system of the substation usually only realizes the remote control function of the lighting system, and the remote control of the lighting system. Control switching and local dual control functions are often lack of consideration. the

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a substation lighting control system that facilitates switching between remote control and local control, as well as realizing local dual control functions. The present invention also discloses the above-mentioned substation lighting control system system control method.

The present invention solves the above problems mainly through the following technical solutions: the substation lighting control system includes a lighting control device, a communication device, and a host computer. The lighting control device is connected to the host computer through a communication device. Transformers, relays, and local control panels with local locking switches and rocker switches, the secondary windings of the local locking switches, rocker switches, relays, and current transformers are all connected to microcontrollers, and the The primary winding of the current transformer and the relay are all connected in series to a power supply circuit formed by a neutral line connected in series with a lamp and a phase line connected in series with a single-pole double-throw switch. When the present invention is applied, the microcontroller is used for logic processing of the entire control system, the current transformer collects current signals, and the microcontroller judges whether the current light is switched off or not through whether the current transformer collects the current signal.

Further, the lighting control device further includes an amplifying and rectifying circuit connected to the microcontroller, and the secondary winding of the current transformer is connected to the microcontroller through the amplifying and rectifying circuit. In this way, the current signal collected by the current transformer is amplified and rectified by the amplification and rectification circuit, and then sent to the microcontroller.

Further, the communication device includes an ARM processor and a CAN bus controller and a LAN controller connected to the ARM processor, and the lighting control device is also provided with a CAN bus controller connected to a microcontroller, and the lighting control The device and the communication device are connected through the CAN bus controllers of the two, and the communication device is connected with the upper computer through its LAN controller. In this way, when the present invention is applied, the upper computer can be connected through the LAN controller, so as to facilitate the realization of wired or wireless networking.

A control method for a substation lighting control system includes the following steps:

Step 1. Set the local locking mode and local unlocking mode in the microcontroller of the lighting control device, wherein the conversion between the local locking mode and the local unlocking mode is generated when the microcontroller receives the switching of the local locking switch The logic signal is controlled;

Step 2. Start the substation lighting control system;

Step 3. The operator selects the local unlocking mode or the local locking mode by switching the local locking switch on the local control panel;

If the working mode of the substation lighting control system is the local unlocking mode, the control method is as follows: the microcontroller judges the status of the current loop through the status of the current transformer, and when the current transformer detects the current, the microcontroller confirms that the power supply loop is open, When the transformer does not detect the current, the microcontroller confirms that the power supply circuit is closed. After the microcontroller confirms the current circuit status, it reports the status of the current light to the host computer. When the host computer sends a switch command to the microcontroller, the microcontroller controls the relay switching. , and then confirm whether to switch the light through the feedback of the current transformer, and then send the operation result to the host computer after confirming whether to switch the light, when the microcontroller has not detected the effective value of the current transformer after repeated switching of the relay , then send an error or fault report to the host computer;

If the working mode of the substation lighting control system is local lock mode, its control method: the microcontroller receives the logic signal of the local lock switch to open, shields the operation command from the upper computer, and judges the current signal value through the signal value detected by the current transformer. The real-time status of the light is reported to the host computer. When the operator presses the rocker switch, the microcontroller controls the state conversion and maintenance of the relay, and at the same time sends the current loop working status to the host computer. Among them, when the present invention is in the local locking mode, the micro-controller switches and maintains the relay state, and cooperates with the single-pole double-throw switch connected in series on the phase line to realize the same dual control function as the lighting system in the traditional substation. If there is current interference in the environment where the control system of the present invention is located, the microcontroller can be set to compare the current detected by the current transformer with a certain set value, and then determine whether the circuit is open.

In summary, the present invention has the following beneficial effects: (1) The overall structure of the control system of the present invention is simple, easy to implement, and low in cost. When the control system of the present invention is applied, the local locking mode can be realized by switching the local locking switch Switching with the local unlocking mode, when switching to the local locking mode, the function of local double control can be realized through the seesaw switch and the single-pole double-throw switch connected in series on the phase line. In this way, the present invention realizes remote control and The switch of the local control and the local dual control function are convenient to operate, saving time and effort.

(2) When the present invention is applied, for the transformation project of the traditional substation, there is no need to change the position of the power supply circuit and the switch of the light, and the light control device is used to replace a certain control switch of the original light system, so as to realize remote control and The switch of local control and the function of local dual control, so it is convenient to apply in the transformation project of substation.

(3) The lighting control device and the communication device of the present invention are connected through the CAN bus. The CAN bus is a serial bus. One communication device can access up to 127 lighting control devices through the CAN bus. The communication device uses a LAN controller and a host computer Networking is carried out, so that when the present invention is applied, it is convenient to carry out multi-point monitoring, and the operation is flexible when realizing remote control.

Description of drawings

    Fig. 1 is a structural schematic diagram of a specific embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1:

As shown in Figure 1, the substation lighting control system includes a lighting control device, a communication device and a host computer, wherein the lighting control device is connected to the host computer through the communication device, and the host computer in this embodiment can be realized by a computer. The lighting control device includes microcontroller, current transformer, amplifying and rectifying circuit, relay and local control panel. The microcontroller adopts STM32 series chips. , rocker switch, relay and the secondary winding of the current transformer are all connected to the microcontroller. On the power supply circuit formed by the phase line of the throw switch.

The control method of the lighting control system of the substation in this embodiment includes the following steps: Step 1, setting the local locking mode and the local unlocking mode in the microcontroller of the lighting control device, wherein the local locking mode and the local unlocking mode The conversion of the mode is controlled by the microcontroller receiving the logic signal generated when the local locking switch is switched; step 2, start the substation lighting control system; step 3, the operator selects the Unlock in place mode or lock in place mode.

When the working mode of the lighting control system of the substation in this embodiment is the local unlocking mode, the remote control is effective, but the local control is invalid. The control method of the local unlocking mode is: the microcontroller judges the current loop status through the status of the current transformer. If the current transformer detects the current, the microcontroller confirms that the power supply loop is turned on, and reports to the host computer that the current light is on. In the on state, when the upper computer sends an off command, the microcontroller controls the relay conversion, and through the feedback of the current transformer to confirm whether the light is effectively turned off, and sends the operation result to the upper computer. When this embodiment is applied, if the power supply circuit itself is closed, the host computer can also send a command to switch the state of the relay to turn on the light, and check the current to confirm whether the circuit is normally open. If the microcontroller does not detect the effective value of the current sensor after repeated switching through the relay, it will send an error or fault report to the host computer.

When the working mode of the lighting control system of the substation in this embodiment is the local locking mode, its control method is as follows: the microcontroller receives the logic signal that the local locking switch is turned on, and then shields the operation command from the upper computer, and detects the signal through the current transformer. The signal value judges the current real-time status of the lamp and reports it to the host computer. When the operator presses the rocker switch, the microcontroller controls the state conversion and maintenance of the relay, and at the same time sends the current loop working status to the host computer.

Example 2:

This embodiment makes the following further limitations on the basis of Embodiment 1: the communication device of this embodiment includes an ARM processor and a CAN bus controller and a LAN controller connected to the ARM processor, and the lighting control device is also provided with A CAN bus controller connected to the micro-controller, wherein the lighting control device and the communication device are connected through the CAN bus controller connecting the two, and the communication device is connected to the upper computer through its LAN controller. The CAN bus is a serial bus, and 127 devices can be connected to its twin-core cable. In this way, when this embodiment is applied, a communication device can connect up to 127 external lighting control devices. The use of CAN bus and Ethernet can reduce costs. Embodiments control system complexity, reducing installation costs.

As described above, the present invention can be preferably carried out. the

Claims (4)

1. transformer station's lamp light control system, it is characterized in that, comprise Light Control Unit, communicator and host computer, described Light Control Unit is connected with host computer by communicator, Light Control Unit comprises microcontroller, current transformer, relay and be provided with the control panel on the spot of locking switch and rocker switch on the spot, described locking switch on the spot, rocker switch, the secondary winding of relay and current transformer is all connected with microcontroller, winding of described current transformer and relay are all serially connected on the current supply circuit consisting of a zero line that is serially connected with lamp and phase line that is serially connected with a single-pole double-throw switch (SPDT).

2. transformer station according to claim 1 lamp light control system, it is characterized in that, described Light Control Unit also comprises the amplification rectification circuit being connected with microcontroller, and the secondary winding of described current transformer is connected with microcontroller by being connected to amplification rectification circuit.

3. transformer station according to claim 1 and 2 lamp light control system, it is characterized in that, CAN bus control unit and LAN controller that described communication device comprises arm processor and is connected with arm processor, described Light Control Unit is provided with the CAN bus control unit being connected with microcontroller, described Light Control Unit is realized connection with the CAN bus control unit that communication device is connected both by CAN bus, and described communicator is connected with host computer by its LAN controller.

4. the control method of transformer station's lamp light control system, is characterized in that, comprises the following steps:

Step 1, in the microcontroller of Light Control Unit, set locking mode and on the spot unlock mode on the spot, wherein, the conversion of locking mode and unlock mode on the spot receives by microcontroller the logical signal producing when locking switch switches on the spot and controls on the spot;

Step 2, startup transformer station lamp light control system,

Step 3, operating personnel are chosen as unlock mode or on the spot locking mode on the spot by the locking switch on the spot switching on control panel on the spot;

If transformer station's lamp light control system mode of operation is unlock mode on the spot, its control mode is: microcontroller judges the state when front loop by the state of current transformer, when current transformer detects electric current, microcontroller is confirmed current supply circuit unlatching, when current transformer detects electric current, microcontroller confirmation current supply circuit is not closed, microcontroller confirms that the backward host computer report of current loop state is when the state of headlight, when host computer is during to the order of microcontroller transmit button, the conversion of microprocessor controls relay, feedback by current transformer is confirmed whether switch lamp again, after being confirmed whether switch lamp again to host computer transmit operation result, the effective value of current transformer after the repeatedly conversion of microcontroller by relay, do not detected yet, to host computer, send mistake or Trouble Report,

If transformer station's lamp light control system mode of operation is locking mode on the spot, its control mode: microcontroller shields the operational order from host computer after receiving the logical signal that locking switch is opened on the spot, and the signal value detecting by current transformer judges the real-time status of current lamp and reports to host computer, when operating personnel press rocker switch, the state of microprocessor controls relay is changed and is kept, and sends current loop works state to host computer simultaneously.