CN201349144Y - Automatic input device of standby power supply - Google Patents

Abstract

The utility model is applicable to the technical field of power system automation, and provides an automatic input device for a backup power supply, which includes: a state quantity acquisition unit, a pattern recognition unit, an electrical physical quantity acquisition unit, an automatic input unit for a backup power supply, a control unit and a relay array. In the utility model, the backup power automatic input device can provide the backup power automatic input function for substations with various wiring modes and various operation modes, which is very convenient to use.

Description

A backup power automatic input device

technical field

The utility model belongs to the technical field of power system automation, in particular to an automatic input device for a backup power supply.

Background technique

In the power system, the power interruption of power plants may cause power outage of the whole plant, with very serious consequences, and the interruption of power supply of important users of industrial and mining enterprises will also severely damage production and bring great losses to the national economy.

In order to ensure the reliability of power supply, the flexibility and convenience of operation mode, substations often have 2 or more than 2 incoming lines. When working normally, one or two incoming lines supply power. When the working power fails, the backup power automatic input device can automatically and quickly put the backup power into operation or switch the user to the backup power, so as not to let the user lose power. .

However, due to the many wiring modes and operation modes of substations, to realize the function of automatic input of backup power in different situations, such as automatic input of incoming lines and automatic input of sections, it is necessary to use different automatic input devices of backup power. It is very inconvenient to use.

Utility model content

The purpose of the utility model is to provide an automatic input device for a backup power supply, aiming at solving the problem of inconvenient use of the current automatic input device for a backup power supply.

The utility model is achieved in this way, a backup power supply automatic input device, the protection device includes:

A state quantity acquisition unit that collects working state signals of circuit breakers and voltage transformers in substations;

A mode recognition unit connected to the state quantity acquisition unit identifies an operation mode in which the backup power supply is automatically put into operation according to the working state signal collected by the state quantity acquisition unit;

An electrical physical quantity acquisition unit that collects electrical physical quantities of the substation and converts the electrical physical quantities into digital signals of electrical physical quantities;

The backup power automatic input unit connected to the state quantity acquisition unit, the pattern recognition unit and the electrical physical quantity acquisition unit respectively, according to the working state signal and the electrical physical quantity digital signal, according to the operation mode of the backup power automatic input, execute the corresponding The backup power supply is automatically put into logic operation, and when the backup power supply needs to be automatically put into operation, the drive signal is output;

A control unit connected to the backup power automatic input unit outputs a control signal according to the drive signal and the pre-programmed exit logic; and

A relay array that is connected with the control unit and executes the automatic switching-on action of the backup power supply.

In the utility model, the backup power automatic input device can provide the backup power automatic input function for substations with various wiring modes and various operation modes, which is very convenient to use.

Description of drawings

Fig. 1 is the structural diagram of the backup power automatic input device provided by the embodiment of the present invention;

Fig. 2 is a structural diagram of the first wiring mode of the substation provided by the embodiment of the present invention;

Fig. 3 is a structural diagram of the second wiring mode of the substation provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 shows the structure of the backup power automatic input device provided by the embodiment of the utility model, and for the convenience of description, only the parts related to the utility model are shown.

The backup power automatic input device provided by the embodiment of the utility model includes: a state quantity acquisition unit 100 , a pattern recognition unit 200 , an electrical physical quantity acquisition unit 300 , a backup power automatic input unit 400 , a control unit 500 and a relay array 600 .

The state quantity acquisition unit 100 collects the working state signals of the circuit breakers and voltage transformers in the substation; the pattern recognition unit 200 is connected with the state quantity collection unit 100, and recognizes the backup power supply automatically according to the working state signals collected by the state quantity collection unit 100 The electrical physical quantity acquisition unit 300 collects the electrical physical quantity of the substation, and converts the electrical physical quantity into a digital signal of the electrical physical quantity; the backup power automatic input unit 400 is respectively connected with the state quantity acquisition unit 100, the pattern recognition unit 200 and the electrical physical quantity acquisition The unit 300 is connected, according to the working state signal and the electrical physical quantity digital signal, according to the operation mode of the automatic input of the backup power supply, executes the corresponding logical operation of the automatic input of the backup power supply, and outputs the driving signal when the automatic input of the backup power supply is required; the control unit 500 Connect with the standby power supply automatic input unit 400, output control signals according to the drive signal and pre-programmed export logic, as an embodiment of the present utility model, the control unit 500 is a programmable logic array chip; the relay array 600 is connected with the control unit 500, To execute the action of automatically turning on the backup power supply, the relay array 600 includes a plurality of relays, and each relay is connected to the control circuit of the circuit breaker in the substation.

The following is an example to illustrate the working process of the backup power automatic input device:

Fig. 2 shows the structure of the substation first wiring mode provided by the embodiment of the present invention, the state quantity acquisition unit 100 collects the working state signals TV10, TV20, TV30, TV40 of the voltage transformer in the substation, if TV10=1, TV20 = 1, TV30 = 1, TV40 = 1, indicating that the voltage transformers are all in the working state, the state quantity acquisition unit 100 simultaneously collects the working state signals of the circuit breakers 1QF, 2QF, and 3QF in the substation, and the working state signal of the circuit breaker 1QF is 1 , the working status signal of the circuit breaker 2QF is 1, the working status signal of the circuit breaker 3QF is 0, and the mode recognition unit 200 recognizes the operation mode in which the backup power supply is automatically put into operation according to the working status signal collected by the state quantity acquisition unit 100 according to the pre-programmed program It is the "subsection switch standby automatic switching mode". The electrical physical quantity acquisition unit 300 collects the electrical physical quantity of the substation, and converts the electrical physical quantity into a digital signal of the electrical physical quantity. , according to the "subsection switch standby self-switching mode", execute the logic operation of "section switch standby self-switching mode", and output the driving signal when the backup power supply needs to be automatically switched on. The specific process is: if the 1# bus is detected There is no voltage on the circuit breaker 1QF, and there is no current on the 1# incoming line of the circuit breaker 1QF. The backup power automatic input unit 400 first outputs a driving signal to disconnect the circuit breaker 1QF, and the control unit 500 outputs a control signal to disconnect the circuit breaker 1QF. The control unit 500 passes Control the control circuit of the circuit breaker 1QF by controlling the relay, disconnect the circuit breaker 1QF, and the backup power supply automatic input unit 400 confirms that the circuit breaker 1QF is indeed in the disconnected state according to the digital signal of electrical physical quantity, and confirms that the 2# bus does have voltage. The power automatic input device controls the circuit breaker 3QF to close, and the backup power is automatically switched on successfully. If the backup power automatic input device detects that there is no voltage on the 2# bus, and there is no current on the 2# incoming line of the circuit breaker 2QF, the backup power automatic input device controls the circuit breaker 2QF to be disconnected, and confirms that the circuit breaker 2QF is indeed in the disconnected state , The backup power automatic input device confirms and judges that the 1# bus has voltage according to the electrical physical quantity digital signal. At this time, the backup power automatic input device controls the circuit breaker 3QF to close, and the backup power is automatically input successfully.

Fig. 3 shows the structure of the substation second wiring mode provided by the embodiment of the present invention, the state quantity acquisition unit 100 collects the working state signals TV10, TV20, TV30, TV40 of the voltage transformer in the substation, if TV10=1, TV20 = 1, TV30 = 1, TV40 = 1, indicating that the voltage transformers are all in the working state, the state quantity acquisition unit 100 simultaneously collects the working state signals of the circuit breakers 1QF, 2QF, and 3QF in the substation, and the working state signal of the circuit breaker 1QF is 1 , the working state signal of the circuit breaker 2QF is 0, the working state signal of the circuit breaker 3QF is 1, and the mode recognition unit 200 recognizes the operation mode that the standby power supply is automatically put into operation according to the preprogrammed program according to the working state signal collected by the state quantity acquisition unit 100 It is the "2# incoming line standby self-switching mode", the electrical physical quantity acquisition unit 300 collects the electrical physical quantity of the substation, and converts the electrical physical quantity into a digital signal of the electrical physical quantity, and the backup power automatic input unit 400 according to the working state signal and the electrical physical quantity digital signal Signal, according to the "2# incoming line standby automatic switch mode", execute the logic operation of "2# incoming line standby automatic switch mode", when it is necessary to perform the automatic switch-on action of the backup power supply, the drive signal is output, and the process is as follows: if detected There is no voltage on the 2# bus, and there is no current on the 1# incoming line of the circuit breaker 1QF. The backup power supply automatic input unit 400 first outputs the drive signal to disconnect the circuit breaker 1QF, and the control unit 500 outputs the control signal to disconnect the circuit breaker 1QF. The unit 500 controls the control circuit of the circuit breaker 1QF through the control relay, disconnects the circuit breaker 1QF, and the backup power supply is automatically switched on. The unit 400 confirms that the circuit breaker 1QF is indeed in the disconnected state according to the electrical physical quantity digital signal, and confirms that the 2# incoming line does have voltage. At this time, the backup power automatic input device controls the circuit breaker 2QF to close, and the backup power is automatically switched on successfully.

In the embodiment of the utility model, the automatic input device for the backup power supply can provide the automatic input function of the backup power supply for substations with various wiring modes and various operating modes, which is very convenient to use.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (3)

1, a kind of automatic throw-in equipment of emergency power supply is characterized in that, described device comprises:

The quantity of state collecting unit that the working state signal of circuit breaker in the transformer station and voltage transformer is gathered;

The pattern recognition unit that is connected with described quantity of state collecting unit, according to the working state signal that described quantity of state collecting unit is gathered, the operational mode that the identification stand-by power supply drops into automatically;

Electric physical quantity to transformer station is gathered, and described electric physical quantity is converted to the electric physical quantity collecting unit of electric physical quantity digital signal;

Automatically drop into the unit with described quantity of state collecting unit, pattern recognition unit and the stand-by power supply that electric physical quantity collecting unit is connected respectively, according to described working state signal and electric physical quantity digital signal, according to the automatic operational mode that drops into of described stand-by power supply, carry out corresponding stand-by power supply and drop into logical operation automatically, when needs execution stand-by power supply drops into action automatically, output drive signal;

Automatically drop into the control unit that the unit is connected with described stand-by power supply, according to described drive signal and in advance the establishment outlet logic, output control signal; And

Be connected with described control unit, carry out stand-by power supply and drop into the relay array of action automatically.

2, automatic throw-in equipment of emergency power supply as claimed in claim 1 is characterized in that, described control unit is the programmable logic array chip.

3, automatic throw-in equipment of emergency power supply as claimed in claim 1 or 2 is characterized in that, described relay array comprises a plurality of relays, and each relay all is connected with the control loop of circuit breaker in the transformer station.

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