CN103151830A

CN103151830A - Emergency power supply automatic operation device of inner bridging line converting station

Info

Publication number: CN103151830A
Application number: CN2013100406701A
Authority: CN
Inventors: 李全意
Original assignee: Zhengzhou Electric Power College
Current assignee: Zhengzhou Electric Power College
Priority date: 2013-02-03
Filing date: 2013-02-03
Publication date: 2013-06-12
Anticipated expiration: 2033-02-03
Also published as: CN103151830B

Abstract

The invention discloses an emergency power supply automatic operation device of an inner bridging line converting station. The emergency power supply automatic operation device of the inner bridging line converting station comprises a singechip which is connected with a keyboard, a displayer and a power source module. Voltage on high voltage sides and low voltage sides of a 1# transformer and a 2# transformer, voltage of an inlet wire 1 and an inlet wire 2, currents of the inlet wire 1 and the inlet wire 2, lower voltage side currents of the 1# transformer and the 2# transformer, an inner bridge currents of high voltage sides of the 1# transformer and the 2# transformer and sectional currents of low voltage sides of the 1# transformer and the 2# transformer are respectively input the singlechip through an analog input circuit. Position signals of each breaker, keep relay outlets of the 1# transformer and the 2# transformer and external blocking signals are input the singlechip through a switching value input circuit. The singlechip respectively controls the corresponding breaker to switch on or switch off through a switching value input circuit. Double-circuit power sources are adopted to supply power, when one circuit of power source breaks down, the other circuit of the power source can be automatically operated, switching speed is fast, and black out time can be effectively reduced.

Description

The substation with internal bridge automatic throw-in equipment of emergency power supply

Technical field:

The present invention relates to a kind of power supply switching device, particularly relate to a kind of substation with internal bridge automatic throw-in equipment of emergency power supply.

Background technology:

Develop rapidly along with economy, enterprises and institutions are increasing to the demand of electric power, and require the stable of supply of electric power and continue, in the important electric unit of using, generally all adopt duplicate supply, when one road power supply breaks down, need to switch to fast another power supply, reduce as far as possible the power interruptions time, if adopt manual switchover, just need to interrupt certain power-on time, this serves inconvenience for the production band; In addition, the stand-by power supply of the transformer station of internal bridge automatically drops into and adopts the two-part control mode at present, respectively high-pressure side and low-pressure side is controlled, and cost is higher, and operation sequence is complicated, the starting-up response overlong time.

Summary of the invention:

Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of reasonable in design, automatic switchover, switching time is short and the substation with internal bridge automatic throw-in equipment of emergency power supply of good reliability.

technical scheme of the present invention is: a kind of substation with internal bridge automatic throw-in equipment of emergency power supply, contain single-chip microcomputer, described single-chip microcomputer respectively with keyboard, display is connected with power module, the voltage of 1# transformer and 2# high voltage side of transformer and low-pressure side, the electric current of the voltage of inlet wire 1 and inlet wire 2 and inlet wire 1 and inlet wire 2, the low-pressure side electric current of 1# transformer and 2# transformer, the electric current of bridge in the high-pressure side, the low-pressure side segmented current is inputted respectively described single-chip microcomputer by simulated measurement input circuit, the position signalling of each circuit breaker, protection relay outlet and the outside block signal of 1# transformer and 2# transformer are inputted described single-chip microcomputer by switching value input circuit, described single-chip microcomputer is controlled respectively combined floodgate or the tripping operation of respective circuit breakers by switching value output circuit.

Described single-chip microcomputer is by communication interface circuit and comprehensive being connected from systematic communication network.Described single-chip microcomputer is connected with indicator light.

The invention has the beneficial effects as follows:

1, the present invention adopts the double loop power supply power supply, and when one road power supply broke down, another road power supply dropped into automatically, and its switching speed is fast, effectively reduces interruption duration.

2, the response time of the present invention short, low-pressure side is controlled the on high-tension side testing result such as does not need can carry out, efficient is high, cost is lower in addition, reduces the operation costs of transformer station.

3, the present invention is take full transforming plant primary system as Mathematical Modeling, is different from other device and only limits to an electric pressure in transformer station high-pressure side, low-pressure side, uses more comprehensively.

4, the present invention can identify full Substation Bus Arrangement operational mode automatically, can adapt to the various fortune of transformer station

Line mode and do not need special customization only drops into automatically with the stand-by power supply that a table apparatus is completed full transformer station, reduces investment outlay.

5, the present invention does not exist high-pressure side, low-pressure side operation time limit matching problem, has accelerated the speed of thoroughly cutting, and guarantees better the load power supply reliability.

6, reasonable in design, the automatic switchover of the present invention, switching time is short and good reliability, it is applied widely, is particularly useful for the transformer station of internal bridge, is fit to all occasions of open loop operation of transformer station's internal bridge high-pressure side, low-pressure side, be easy to promotion and implementation, have good economic benefit.

Description of drawings:

Fig. 1 is the Substation Bus Arrangement figure of internal bridge;

Fig. 2 is the hardware structure diagram of substation with internal bridge automatic throw-in equipment of emergency power supply;

Fig. 3 is the main program flow chart of substation with internal bridge automatic throw-in equipment of emergency power supply;

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

Fig. 5 is the block diagram of mode 4 handling procedures in Fig. 3.

Embodiment:

Embodiment: referring to Fig. 1-Fig. 5, in figure, 1-single-chip microcomputer, 2-power module, 3-integrated system communication network, 4-indicator light, 5-keyboard, 6-display.

the substation with internal bridge automatic throw-in equipment of emergency power supply contains single-chip microcomputer 1, single-chip microcomputer 1 respectively with keyboard 5, display 6 is connected connection with power module, the high-pressure side of 1# transformer 1T is connected with the power supply of inlet wire 1 by 1# high-pressure side circuit breaker 1QF, the low-pressure side of 1# transformer 1T is connected with low voltage equipment by 1# low-pressure side circuit breaker 4QF, the high-pressure side of 2# transformer 2T is connected with the power supply of inlet wire 2 by 2# high-pressure side circuit breaker 2QF, the low-pressure side of 2# transformer 2T is connected with low voltage equipment by 2# low-pressure side circuit breaker 5QF, be connected by high-pressure side circuit breaker 3QF between the high-pressure side of 1# transformer 1T and the high-pressure side of 2# transformer 2T, be connected by low-pressure side circuit breaker 6QF between the low-pressure side of 1# transformer 1T and the low-pressure side of 2# transformer 2T, the voltage of 1

# transformer

1T and 2# transformer 2T high-pressure side and low-pressure side, the electric current of the voltage of inlet wire 1 and inlet wire 2 and inlet wire 1 and inlet wire 2, the low-pressure side electric current of 1

# transformer

1T and 2# transformer 2T, the electric current of bridge in the high-pressure side, the low-pressure side segmented current is inputted respectively single-chip microcomputer 1 by simulated measurement input circuit, the position signalling of each circuit breaker, protection relay outlet and the outside block signal of 1

# transformer

1T and 2# transformer 2T are inputted single-chip microcomputer 1 by switching value input circuit, single-chip microcomputer 1 is controlled respectively combined floodgate or the tripping operation of respective circuit breakers by switching value output circuit.

As required, single-chip microcomputer 1 is connected with integrated system communication network 3 by communication interface circuit.Single-chip microcomputer 1 is connected with indicator light 4.

each U in Fig. 2, I is from each TV in Fig. 1, the electric current of TA secondary side and voltage, K1 in Fig. 2, the signals such as K2 are external switch amount signals, the position signalling that comprises each circuit breaker in Fig. 1, 1# and the protection of 2# transformer depressor (comprise main protection, the high-pressure side backup protection, the low-pressure side backup protection) relay outlet, outside block signal (comprises that the AAT device drops into, change over switch out of service, brace, the outlet of some protection etc.), the analog quantity of 1 pair of input of single-chip microcomputer, switching value is calculated, be used for the logic judgement after processing, when meeting startup and action logic, send tripping operation by switching value output circuit, close a floodgate and order, and send alarm signal.Communication interface circuit is used for the information exchange between single-chip microcomputer 1 and comprehensive automation system of transformer substation.The 220V that power module 2 provides the outside exchanges or DC power supply is converted to protective device work required voltage.

The groundwork logic of patent device (being called for short AAT) is completed by main program and five mode handling procedures, and main program block diagram as shown in Figure 3; Mode 1 handling procedure block diagram as shown in Figure 4,

mode

2,3 handling procedures are similar to mode 1; Mode 4 handling procedure block diagrams as shown in Figure 4, mode 5 handling procedures are similar to mode 4.In Fig. 3, Fig. 4, the basic principle of each operational mode, entry condition and work is as shown in table 1.

Table 1

The identification of operational mode described in table 1 is to realize by the situation that monitors each relative breaker position signalling, 1TA～4TA secondary side current in transformer station; The judgement of each entry condition is to protect actuating signal, the variation of each branch current, the variation of circuit breaker position, the variation of each busbar voltage to complete realization by monitoring that each is correlated with.

The above, it is only preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.

Claims

1. substation with internal bridge automatic throw-in equipment of emergency power supply, contain single-chip microcomputer, described single-chip microcomputer respectively with keyboard, display is connected with power module, it is characterized in that: the voltage of 1# transformer and 2# high voltage side of transformer and low-pressure side, the electric current of the voltage of inlet wire 1 and inlet wire 2 and inlet wire 1 and inlet wire 2, the low-pressure side electric current of 1# transformer and 2# transformer, the electric current of bridge in the high-pressure side, the low-pressure side segmented current is inputted respectively described single-chip microcomputer by simulated measurement input circuit, the position signalling of each circuit breaker, protection relay outlet and the outside block signal of 1# transformer and 2# transformer are inputted described single-chip microcomputer by switching value input circuit, described single-chip microcomputer is controlled respectively combined floodgate or the tripping operation of respective circuit breakers by switching value output circuit.

2. substation with internal bridge automatic throw-in equipment of emergency power supply according to claim 1, it is characterized in that: described single-chip microcomputer is by communication interface circuit and comprehensive being connected from systematic communication network.

3. substation with internal bridge automatic throw-in equipment of emergency power supply according to claim 1 and 2, it is characterized in that: described single-chip microcomputer is connected with indicator light.