CN203086234U - Total-station automatic throw-in equipment of emergency power supply - Google Patents

Abstract

The utility model discloses a full-station backup power supply automatic input device, which contains a single-chip microcomputer, and the single-chip microcomputer is respectively connected with a keyboard, a display and a power supply module, and the voltage and incoming line of the high-voltage side and the low-voltage side of the 1# transformer and the 2# transformer The voltage of 1 and incoming line 2, the current of incoming line 1 and 2, the low-voltage side current of 1# transformer and 2# transformer, the current of high-voltage side inner bridge, and the segmental current of low-voltage side are respectively input to the The single-chip microcomputer, the position signal of each circuit breaker, the protection relay outlet of the 1# transformer and the 2# transformer, and the external blocking signal are input into the single-chip microcomputer through the digital input circuit, and the single-chip microcomputer respectively controls the corresponding circuit breaker through the digital output circuit. Closing or tripping. The utility model adopts dual power supply for power supply. When one power supply fails, the other power supply is automatically switched on, and its switching speed is fast, effectively reducing the power failure time.

Description

Total station backup power automatic input device

Technical field:

The utility model relates to a power switching device, in particular to a total-station automatic switching device for standby power. the

Background technique:

With the rapid development of the economy, enterprises and institutions have an increasing demand for power, and also require stable and continuous power supply. In important power-consuming units, dual power supplies are generally used. When one power supply fails, it is necessary to quickly Switch to another power supply to minimize the power interruption time. If manual switching is used, the power supply needs to be interrupted for a certain period of time, which brings some inconvenience to production. In addition, the current automatic input of the backup power supply of the substation with the inner bridge connection adopts a two-stage method The control method controls the high-voltage side and the low-voltage side separately, which is costly, and the operation procedure is complicated, and the start-up response time is too long.

Utility model content:

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, and to provide a fully-stationed backup power automatic input device with reasonable design, automatic switching, short switching time and good reliability.

The technical scheme of the utility model is: a kind of automatic input device of total station backup power supply, which contains a single-chip microcomputer, and the single-chip microcomputer is respectively connected with the keyboard, the display and the power supply module, the voltage of the high-voltage side and the low-voltage side of the 1# transformer and the 2# transformer, The voltage of incoming line 1 and incoming line 2, the current of incoming line 1 and incoming line 2, the low-voltage side current of 1# transformer and 2# transformer, the current of high-voltage side inner bridge, and the segmental current of low-voltage side pass through the analog input circuit respectively. Input the single-chip microcomputer, the position signal of each circuit breaker, the protection relay outlet of the 1# transformer and the 2# transformer, and the external blocking signal are input into the single-chip microcomputer through the switching value input circuit, and the said single-chip microcomputer controls the corresponding circuit breaker respectively through the switching value output circuit closing or tripping of the device. the

The single-chip microcomputer is connected with a comprehensive self-system communication network through a communication interface circuit. The single-chip microcomputer is connected with the indicator light. the

The beneficial effects of the utility model are:

1. The utility model adopts dual power supply for power supply. When one power supply fails, the other power supply is automatically switched on, and the switching speed is fast, which effectively reduces the power failure time.

2. The response time of the utility model is short, the low-voltage side control can be carried out without waiting for the detection result of the high-voltage side, the efficiency is high, and the cost is low, which reduces the operating cost of the substation. the

3. The utility model takes the primary system of the whole substation as a mathematical model, which is different from other devices that are limited to only one voltage level in the high-voltage side and low-voltage side of the substation, and is more comprehensive in use. the

4. The utility model can automatically identify the operation mode of the main wiring of the whole substation, and can adapt to various operations of the substation.

There is no need for special customization, and only one device is used to complete the automatic input of the backup power of the whole substation, saving investment.

5. The utility model does not have the problem of coordination between the action time limit of the high-voltage side and the low-voltage side, which speeds up the through-cutting speed and better ensures the reliability of the load power supply. the

6. The utility model has the advantages of reasonable design, automatic switching, short switching time and good reliability. It has a wide range of applications, especially for substations with internal bridge connections, and is suitable for open-loop operation of high-voltage and low-voltage sides of internal bridge connections in substations. It is easy to promote and implement, and has good economic benefits. the

Description of drawings:

Figure 1 is the main wiring diagram of the substation with inner bridge wiring;

Fig. 2 is the hardware structural diagram of the automatic input device of the total station backup power supply;

Fig. 3 is the main program flow chart of the total-station backup power supply automatic input device;

Fig. 4 is the block diagram of mode 1 processing procedure in Fig. 3;

FIG. 5 is a block diagram of the processing program of mode 4 in FIG. 3 .

Detailed ways:

Embodiment: see Fig. 1-Fig. 5, among the figure, 1-single-chip microcomputer, 2-power supply module, 3-integrated self-system communication network, 4-indicating light, 5-keyboard, 6-display.

The total-station backup power automatic input device includes a single-chip microcomputer 1, and the single-chip microcomputer 1 is connected to the keyboard 5, the display 6 and the power module 2 respectively, and the high-voltage side of the 1# transformer 1T is connected to the power supply of the incoming line 1 through the 1# high-voltage side circuit breaker 1QF, The low-voltage side of 1# transformer 1T is connected to low-voltage electrical equipment through 1# low-voltage side circuit breaker 4QF, the high-voltage side of 2# transformer 2T is connected to the power supply of incoming line 2 through 2# high-voltage side circuit breaker 2QF, and the power supply of 2# transformer 2T The low-voltage side is connected to low-voltage electrical equipment through 2# low-voltage side circuit breaker 5QF, the high-voltage side of 1# transformer 1T is connected to the high-voltage side of 2# transformer 2T through high-voltage side circuit breaker 3QF, and the low-voltage side of 1# transformer 1T is connected to The low-voltage side of 2# transformer 2T is connected through the low-voltage side circuit breaker 6QF, the voltage of the high-voltage side and low-voltage side of 1# transformer 1T and 2# transformer 2T, the voltage of incoming line 1 and incoming line 2, and the voltage of incoming line 1 and incoming line The current of 2, the low-voltage side current of 1# transformer 1T and 2# transformer 2T, the current of the high-voltage side inner bridge, and the segmental current of the low-voltage side are respectively input into single-chip microcomputer 1 through the analog input circuit, the position signal of each circuit breaker, and 1# transformer 1T and 2# Transformer 2T's protective relay outlet and external blocking signal are input to the single-chip microcomputer 1 through the digital input circuit, and the single-chip microcomputer 1 controls the closing or tripping of the corresponding circuit breaker through the digital output circuit. the

According to needs, the single-chip microcomputer 1 is connected with the integrated system communication network 3 through the communication interface circuit. The single chip microcomputer 1 is connected with the indicator light 4 . the

Each U and I in Figure 2 is the current and voltage from the secondary side of each TV and TA in Figure 1, and the signals K1 and K2 in Figure 2 are external switching signals, including the position signal of each circuit breaker in Figure 1, 1 # and 2# Transformer transformer protection (including main protection, high-voltage side backup protection, low-voltage side backup protection) relay outlet, external blocking signal (including AAT device input, switch-off switch, connecting piece, some protection Exit, etc.), the single-chip microcomputer 1 calculates and processes the input analog and switch values for logical judgment. When it meets the start and action logic, it sends out tripping and closing commands through the switch output circuit, and sends out an alarm signal. The communication interface circuit is used for information exchange between the single chip microcomputer 1 and the substation integrated automation system. The power module 2 converts the external 220V AC or DC power supply into the voltage required for the protection device to work. the

The main working logic of the patented device (abbreviated as AAT) is completed by the main program and five processing procedures, the main program block diagram is shown in Figure 3; 1 is similar; the block diagram of mode 4 processing program is shown in Figure 4, and the processing program of mode 5 is similar to mode 4. Table 1 shows the operating modes, start-up conditions and working principles in Fig. 3 and Fig. 4. the

Table 1

The identification of the operation mode described in Table 1 is realized by monitoring the position signals of each relevant circuit breaker in the substation and the secondary side current of 1TA~4TA; the judgment of each starting condition is achieved by monitoring the relevant protection action signals, each The change of the branch current, the change of the position of the circuit breaker, and the change of the voltage of each bus can be realized.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model, All still belong to within the scope of the technical solution of the utility model. the

Claims (3)

1. A total-station backup power supply automatic input device, containing a single-chip microcomputer, the single-chip microcomputer is respectively connected with a keyboard, a display and a power supply module. The voltage of 1 and incoming line 2, the current of incoming line 1 and 2, the low-voltage side current of 1# transformer and 2# transformer, the current of high-voltage side inner bridge, and the segmental current of low-voltage side are respectively input to the The single-chip microcomputer, the position signal of each circuit breaker, the protection relay outlet of the 1# transformer and the 2# transformer, and the external blocking signal are input into the single-chip microcomputer through the digital input circuit, and the single-chip microcomputer respectively controls the corresponding circuit breaker through the digital output circuit. Closing or tripping. 2. The total-station backup power automatic input device according to claim 1, characterized in that: the single-chip microcomputer is connected to the integrated self-system communication network through a communication interface circuit. 3. The total-station backup power supply automatic input device according to claim 1 or 2, characterized in that: said single-chip microcomputer is connected with an indicator light.

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