Pulse output electric energy meter control fee control opening control circuit

Abstract

The application discloses a kind of pulse output electric energy meter control fee control opening control circuit, including including electric energy meter, intermediate relay, odd-even discrimination device and circuit breaker;The electric energy meter includes power supply unit, pulse output unit, alarm unit and electric energy meter communication unit.The application has pulse output electric energy meter and can control tripping function, the existing circuit is simple to transform, effectively reduces the transformation cost and difficulty, and is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of electricity, and particularly relates to a pulse output electric energy meter control fee control opening and closing control circuit. BACKGROUND

[0002] The electricity selling management device can realize fee control function in cooperation with the load management terminal and the fee control electric energy meter. The fee control function is divided into local and remote two modes. In the two modes, the load management terminal outputs signals to control the load switch, and the two fee control modes can be set and switched by configuring the load management terminal parameters.

[0003] The remote fee control mode: the electric quantity is measured by the fee control electric energy meter, the electric quantity data is uploaded to the electricity calculation system by the metering automation system, the electricity calculation is completed by the electricity calculation system, and the remote control command is initiated to the load management terminal according to the customer electricity balance. That is, meter head measurement, system billing, and remote control.

[0004] The local fee control mode: the electric quantity is measured and the electricity is calculated by the fee control electric energy meter, the customer holds the card to perform recharging, parameter updating and other operations on the fee control electric energy meter, and the load management device performs the opening and closing control according to the remaining amount of the fee control electric energy meter. That is, meter head measurement, meter head billing, local control, and power card recharging.

[0005] At present, in the prepayment scheme running in the power grid, the fee control opening and closing function is realized by the terminal control pole circuit breaker opening and closing. This scheme has many scenes without the load control management terminal in the actual operation process, and the on-site reconstruction is difficult. In many cases, the load control management terminal needs to be increased, the whole station needs to be reconstructed, and the cost is huge. Therefore, a new circuit is needed to reduce the reconstruction cost. SUMMARY

[0006] To solve the above problems, the present application provides a pulse output electric energy meter control fee control opening and closing control circuit.

[0007] To achieve the above technical effects, the technical scheme of the present application is as follows:

[0008] A pulse output electric energy meter control fee control opening and closing control circuit, comprising an electric energy meter, an intermediate relay, an odd-even discrimination device and a circuit breaker; the electric energy meter comprises a power supply unit, a pulse output unit, an alarm unit and an electric energy meter communication unit;

[0009] The intermediate relay comprises an action contact, a power supply coil and an action contact two; wherein the action contact one is a pair of normally closed and normally open contacts, and the action contact two is a normally open contact;

[0010] The odd-even discrimination device comprises a power supply unit, an odd number execution unit, a discrimination unit, a closed position signal acquisition unit, an odd number signal acquisition unit and an odd-even discrimination device communication unit;

[0011] The circuit breaker comprises a power supply unit, a closing unit and a tripping unit; the electric energy meter is in communication connection with the parity discrimination device through the electric energy meter communication unit and the parity discrimination device communication unit; the parity discrimination device is electrically connected with the intermediate relay and the circuit breaker; the electric energy meter first sends a pulse signal to the discrimination unit, the discrimination unit judges whether the number of the pulse signal sent by the electric energy meter is odd or even, when the number is odd, and the closing signal acquisition unit acquires that the circuit breaker is in the closing state, a signal is sent to the odd signal acquisition unit, then the odd signal acquisition unit sends a signal to the odd execution unit to control the circuit breaker to trip; when the number of the pulse signal is odd, but the closing signal acquisition unit acquires that the circuit breaker is not in the closing state, no signal is sent to the odd signal acquisition unit, and the staff is informed to check the line through the alarm unit.

[0012] Further improvement, the circuit breaker further comprises an A-phase outgoing line end, an A-phase outgoing line end and an N-phase incoming line end, the A-phase outgoing line end is electrically connected with one end of the power supply unit of the circuit breaker, one end of the moving contact one of the intermediate relay, one end of the pulse output unit of the electric energy meter, one end of the power supply unit of the parity discrimination device and one end of the alarm unit of the electric energy meter through the first switch; the other end of the pulse output unit of the electric energy meter is electrically connected with one end of the odd signal collection unit of the parity discrimination device; the A-phase outgoing line end L is electrically connected with one end of the power supply coil of the intermediate relay through the second switch, the other end of the power supply coil of the intermediate relay is electrically connected with the N-phase incoming line end N, the other end of the power supply unit of the parity discrimination device, the other end of the odd signal collection unit of the parity discrimination device and the other end of the power supply unit of the circuit breaker; one end of the closing unit of the circuit breaker is electrically connected with one end of the closing button; the other end of the closing button is electrically connected with one end of the tripping button and one end of the odd execution unit of the parity discrimination device; the other end of the tripping button and the other end of the odd execution unit are electrically connected with one end of the tripping unit of the circuit breaker, and the other end of the tripping unit of the circuit breaker is electrically connected with the other end of the closing unit of the circuit breaker.

[0013] Further improvement, the parity discrimination device is a parity checker.

[0014] Further improvement, one end of the power supply indicator is electrically connected with the A-phase outgoing line end, and the other end is electrically connected with the N-phase incoming line end.

[0015] Further improvement, the other end of the moving contact one of the intermediate relay is electrically connected with the N-phase incoming line end through the closing indicator and the tripping indicator respectively.

[0016] Further improvement, the other end of the alarm unit of the electric energy meter is electrically connected with the N-phase incoming line end through the alarm indicator and the buzzer respectively.

[0017] Further improvement, the moving contact one is a pair of normally closed and normally open contacts.

[0018] A further improvement also includes a false operation delay circuit, which includes an action contact three of the intermediate relay; one end of the action contact three is electrically connected to one end of the closing signal acquisition unit of the odd-even discrimination device, and the other end of the action contact three is electrically connected to the other end of the closing signal acquisition unit of the odd-even discrimination device.

[0019] Advantages of the present invention:

[0020] 1. The tripping function can be controlled by an electric energy meter with pulse output.

[0021] 2. The anti-false tripping structure is safer and more reliable.

[0022] 3. Reduce the cost and difficulty of transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a diagram of the device unit of the present invention;

[0024] Figure 2 This is a circuit control schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the principle of controlling closing and tripping of the electric energy meter pulse signal;

[0026] Figure 4 This is a schematic diagram of the malfunction delay circuit;

[0027] Figure 5 It is a control flow chart of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0029] Example 1

[0030] like Figure 1 The pulse output electric energy meter control fee control and opening control circuit shown includes an electric energy meter PJ, an intermediate relay KA, an odd-even distinguishing device KS and a circuit breaker QF;

[0031] The electric energy meter PJ includes a power supply unit PJ1, a pulse output unit PJ2, an alarm unit PJ3, an RS485 communication unit PJ4 and a 4G communication unit PJ5.

[0032] The intermediate relay KA includes an operating contact KA1, a power coil KA2 and an operating contact KA3; wherein the operating contact KA1 is a pair of normally closed and normally open contacts, and the operating contact KA3 is a normally open contact.

[0033] The parity identification device KS includes a power supply unit KS1, an odd execution unit KS2, a determination unit KS3, a close signal acquisition unit KS4, an odd signal acquisition unit KS5, and a parity identification device communication unit KS0.

[0034] The circuit breaker QF includes a power supply unit QF1 , a closing unit QF2 and a tripping unit QF3 .

[0035] Among them, the electricity meter PJ is communicated with the odd-even discrimination device KS through the electricity meter communication unit and the odd-even discrimination device communication unit KS0; the odd-even discrimination device KS is electrically connected to the intermediate relay KA and the circuit breaker QF; the electricity meter first sends the pulse signal to the discrimination unit KS3, and the discrimination unit KS3 determines whether the number of pulse signals sent by the electricity meter is odd or even. When it is an odd number, and the closing signal acquisition unit KS4 detects that the circuit breaker QF is in the closed state, the signal is sent to the odd signal acquisition unit KS5, and then the odd signal acquisition unit KS5 sends a signal to the odd execution unit KS2 to control the circuit breaker QF to perform a tripping operation; when the number of pulse signals is an odd number, but the closing signal acquisition unit KS4 detects that the circuit breaker QF is not in the closed state, no signal is sent to the odd signal acquisition unit KS5, and the alarm unit PJ3 is used to notify the staff to check the line.

[0036] The specific circuit control structure of the present invention is as follows Figure 2 As shown:

[0037] It includes the A-phase outlet terminal L, the A-phase outlet terminal A and the N-phase incoming terminal N of the circuit breaker. The A-phase outlet terminal A is electrically connected to one end of the power supply unit QF1 of the circuit breaker, one end of the action contact KA1 of the intermediate relay, one end of the pulse output unit PJ2 of the electric energy meter, one end of the power supply unit KS1 of the odd-even discrimination device and one end of the alarm unit PJ3 of the electric energy meter through a first switch; the other end of the pulse output unit PJ2 of the electric energy meter is electrically connected to one end of the odd-number signal collection unit KS5 of the odd-even discrimination device; the A-phase outlet terminal L is electrically connected to one end of the power supply coil KA2 of the intermediate relay through a second switch, and the other end of the power supply coil KA2 of the intermediate relay is electrically connected to the N-phase incoming terminal N, the odd-even discrimination device The other end of the power supply unit KS1 of the device, the other end of the odd signal collection unit KS5 of the parity identification device, and the other end of the power supply unit QF1 of the circuit breaker; one end of the closing unit QF2 of the circuit breaker is electrically connected to one end of the closing button SBC; the other end of the closing button SBC is electrically connected to one end of the tripping button SBS and one end of the odd execution unit KS2 of the parity identification device; the other end of the tripping button SBS and the other end of the odd execution unit KS2 are electrically connected to one end of the circuit breaker's tripping unit QF3, and the other end of the circuit breaker's tripping unit QF3 is electrically connected to the other end of the circuit breaker's closing unit QF2. The parity identification device is a parity checker.

[0038] One end of the power indicator lamp HW is electrically connected to the A-phase outlet end A, and the other end is electrically connected to the N-phase inlet end N.

[0039] The other end of the moving contact one KA1 of the intermediate relay is electrically connected to the N-phase inlet end N through the closing indicator lamp HR and the tripping indicator lamp HG, respectively.

[0040] The other end of the alarm unit PJ3 of the electric energy meter is electrically connected to the N-phase inlet end N through the alarm indicator lamp HY and the buzzer HA, respectively.

[0041] The moving contact one KA1 is a pair of normally closed and normally open contacts.

[0042] In order to prevent misoperation, a misoperation delay circuit is arranged, and the misoperation delay circuit comprises the moving contact three KA3 of the intermediate relay; one end of the moving contact three KA3 is electrically connected to one end of the closing position signal acquisition unit of the odd-even discrimination device, and the other end of the moving contact three KA3 is electrically connected to the other end of the closing position signal acquisition unit of the odd-even discrimination device.

[0043] The principle of the present application is as follows:

[0044] As shown in Figure 3 The electric energy meter outputs a plurality of situations, and generally only one group of pulse output relays, the pulse width is generally 80 ms, and the action principle is: 1, when the electric energy meter receives the tripping command of the master station through the 4G communication unit PJ5, the pulse output unit PJ2 of the electric energy meter executes the pulse width 80 ms pulse wave; 2, when the electric energy meter receives the tripping command of the master station through the 4G communication unit PJ5, the pulse output unit PJ2 of the electric energy meter executes the pulse width 80 ms pulse wave. Since it can only transmit the pulse signal with a pulse width of 80 ms, it cannot effectively distinguish whether the closing signal or the tripping signal of the electric energy meter output is the closing signal or the tripping signal. The existing circuit modification usually needs to install a negative control management terminal or a special variable acquisition terminal.

[0045] Remote tripping principle:

[0046] Under the condition that the power supply unit KS1 of the odd-even discrimination device is electrified, the odd signal acquisition KS5 changes the normally open contact to a normally closed signal by receiving the normally open contact action sequence 80 ms of the opening and closing unit PJ2 in the electric energy meter, so that the acquisition signal is actuated, and the odd-even discrimination device is judged by the odd signal acquisition KS5 through the discrimination unit KS3, so that the odd execution unit KS2 of the odd-even discrimination device is closed, the tripping loop is turned on, the switch QF3 tripping coil is electrified, and the switch QF is tripped.

[0047] Manual closing principle

[0048] When the closing button SBS is pressed, the switch closing unit QF2 is turned on, and the switch QF is closed.

[0049] Manual tripping principle

[0050] When the tripping button SBS is pressed, the switch tripping unit QF3 is turned on, and the switch QF is tripped.

[0051] Anti-misoperation principle:

[0052] When the switch is in the closing state, before tripping, the circuit breaker QF is in the closing state, and the power coil KA2 of the intermediate relay is in the power-on state. At this time, the normally closed contact KA3 of the intermediate relay is in the closed state. The odd-even discrimination device judges this signal, and the odd-even discrimination device odd signal acquisition unit KS5 sends the discrimination unit KS3 of the odd-even discrimination device, so that the switch completes the opening action. In this process, it is assumed that the switch is in a fault state (i.e. not in the opening state, nor in the closing state). The switch QF will not act, because the discrimination unit of the odd-even discrimination device cannot receive the closing state given by KA3 from the switch QF. The switch can only be in the closing state to meet one of the switch opening conditions. When the odd-even discrimination device cannot receive the odd signal acquisition unit KS5, the discrimination unit KS3 will also refuse to trip the odd discrimination unit KS2 of the odd-even discrimination device.

[0053] The above is only one specific implementation of the present application, but the design concept of the present application is not limited to this. Any non-essential modification of the present application using this concept shall be deemed to be an infringement of the protection scope of the present application.

Claims

1. A pulse output electric energy meter control fee control opening control circuit, characterized in that, It comprises an electric energy meter (PJ), an intermediate relay (KA), an odd-even discrimination device (KS) and a circuit breaker (QF); the electric energy meter (PJ) comprises a first power supply unit (PJ1), a pulse output unit (PJ2), an alarm unit (PJ3) and an electric energy meter communication unit; The intermediate relay (KA) comprises a moving contact one (KA1), a power supply coil (KA2) and a moving contact two (KA3); wherein the moving contact one (KA1) is a pair of normally closed and normally open contacts, and the moving contact two (KA3) is a normally open contact; The odd-even discrimination device (KS) comprises a second power supply unit (KS1), an odd number execution unit (KS2), a discrimination unit (KS3), a closed position signal acquisition unit (KS4), an odd number signal acquisition unit (KS5) and an odd-even discrimination device communication unit (KS0); The circuit breaker (QF) comprises a third power supply unit (QF1), a closing unit (QF2) and a tripping unit (QF3); wherein the electric energy meter (PJ) is in communication connection with the odd-even discrimination device (KS) through the electric energy meter communication unit and the odd-even discrimination device communication unit (KS0); the odd-even discrimination device (KS) is electrically connected with the intermediate relay (KA) and the circuit breaker (QF); the electric energy meter sends the pulse signal to the discrimination unit (KS3) first, the discrimination unit (KS3) judges whether the pulse signal number sent by the electric energy meter is odd or even, when it is odd, and the closed position signal acquisition unit (KS4) acquires that the circuit breaker (QF) is in the closing state, a signal is sent to the odd number signal acquisition unit (KS5), then the odd number signal acquisition unit (KS5) sends a signal to the odd number execution unit (KS2) to control the circuit breaker (QF) to trip; when the pulse signal number is odd, but the closed position signal acquisition unit (KS4) acquires that the circuit breaker (QF) is not in the closing state, no signal is sent to the odd number signal acquisition unit (KS5), and the staff is informed to check the line through the alarm unit (PJ3).

2. The impulse output electric energy meter control fee control tripping control circuit according to claim 1, characterized in that, The circuit breaker (QF) further comprises an A-phase outgoing terminal (L), an A-phase outgoing terminal (A), and an N-phase incoming terminal (N). The A-phase outgoing terminal (A) is electrically connected to one end of a third power supply unit (QF1) of the circuit breaker, one end of an action contact one (KA1) of an intermediate relay, one end of a pulse output unit (PJ2) of an electric energy meter, one end of a second power supply unit (KS1) of an odd-even discrimination device, and one end of an alarm unit (PJ3) of the electric energy meter through a first switch. The other end of the pulse output unit (PJ2) of the electric energy meter is electrically connected to one end of an odd signal acquisition unit (KS5) of the odd-even discrimination device through a discrimination unit (KS3). The A-phase outgoing terminal (L) is electrically connected to one end of a power coil (KA2) of the intermediate relay through a second switch. The other end of the power coil (KA2) of the intermediate relay is electrically connected to the N-phase incoming terminal (N), the other end of the second power supply unit (KS1) of the odd-even discrimination device, the other end of the odd signal acquisition unit (KS5) of the odd-even discrimination device, and the other end of the third power supply unit (QF1) of the circuit breaker. One end of a closing unit (QF2) of the circuit breaker is electrically connected to one end of a closing button (SBC). The other end of the closing button (SBC) is electrically connected to one end of a tripping button (SBS) and one end of an odd execution unit (KS2) of the odd-even discrimination device. The other end of the tripping button (SBS) and the other end of the odd execution unit (KS2) are electrically connected to one end of a tripping unit (QF3) of the circuit breaker. The other end of the tripping unit (QF3) of the circuit breaker is electrically connected to the other end of the closing unit (QF2) of the circuit breaker.

3. The impulse output electric energy meter control fee control tripping control circuit according to claim 1, characterized in that, The odd-even discrimination device is an odd-even checker.

4. The impulse output electric energy meter control fee control tripping control circuit according to claim 2, characterized in that, One end of the power indicator light (HW) is electrically connected to the A-phase outgoing terminal (A), and the other end is electrically connected to the N-phase incoming terminal (N).

5. The impulse output electric energy meter control fee control tripping control circuit according to claim 1, characterized in that, The other end of the action contact one (KA1) of the intermediate relay is electrically connected to the N-phase incoming terminal (N) through a closing indicator light (HR) and a tripping indicator light (HG), respectively.

6. The impulse output electric energy meter control fee control tripping control circuit according to claim 2, characterized in that, The other end of the alarm unit (PJ3) of the electric energy meter is electrically connected to the N-phase incoming terminal (N) through an alarm indicator light (HY) and a buzzer (HA), respectively.

7. The pulse output electric energy meter control fee control and opening control circuit according to claim 1, characterized in that: The action contact one (KA1) is a pair of normally closed and normally open contacts.

8. The impulse output electric energy meter control fee control tripping control circuit according to claim 1, characterized in that, The false action delay circuit further comprises an action contact two (KA3) of the intermediate relay. One end of the action contact two (KA3) is electrically connected to one end of a closed position signal acquisition unit of the odd-even discrimination device, and the other end of the action contact two (KA3) is electrically connected to the other end of the closed position signal acquisition unit of the odd-even discrimination device.

9. The impulse output electric energy meter control fee control tripping control circuit according to claim 1, characterized in that, The communication unit of the electric energy meter comprises an RS485 communication unit (PJ4) and a 4G communication unit (PJ5).

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