A fee control circuit and fee control method for a fee control circuit breaker

Abstract

The present invention discloses a fee control circuit and a fee control method for a fee control circuit breaker, comprising an A-phase outlet terminal, an L-phase outlet terminal and an N-phase outlet terminal of the fee control circuit breaker; wherein the L-phase outlet terminal is electrically connected to the N-phase outlet terminal through a power coil of an intermediate relay, and the A-phase outlet terminal is electrically connected to a fixed end of an action contact of the intermediate relay, one end of an alarm switch of an electric energy meter and one end of a power indicator light. The present invention enables an electric energy meter with a pulse output to control the opening and closing functions, and has the advantages of being safer and more reliable in case of mis-opening and mis-closing, and reducing the cost and difficulty of transformation.

Description

Technical Field

[0001] The present invention relates to the field of electricity, and in particular to a fee control circuit and a fee control method for a fee control circuit breaker. Background Art

[0002] The electricity sales management device can cooperate with the load management terminal and the fee control electric energy meter to realize the fee control function. The fee control function is divided into two modes: local and remote. In both modes, the load management terminal outputs a signal to control the load fee control circuit breaker, and the two fee control modes can be set and switched by configuring the load management terminal parameters.

[0003] Remote fee control method: The fee control electric energy meter measures the electricity consumption, and the metering automation system uploads the electricity consumption data to the electricity fee calculation system, which completes the electricity fee calculation and initiates a remote control command to the load management terminal based on the customer's electricity fee balance. That is, meter metering, system billing, and remote control.

[0004] Local fee control method: the fee-controlled energy meter measures electricity and calculates electricity charges. The customer uses the card to recharge the fee-controlled energy meter, update parameters, and the load management device performs switch-on and switch-off control according to the remaining amount in the fee-controlled energy meter. That is, meter measurement, meter billing, local control, and electricity purchase card recharge.

[0005] At present, in the prepaid payment scheme running in the power grid, the fee control opening and closing function is realized by opening and closing the fee control circuit breaker on the terminal control column. This scheme does not have a load control management terminal in many scenarios during actual operation, and the on-site modification is difficult. In many cases, in order to add a load control management terminal, the entire station needs to be modified, which is very costly. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a fee control circuit and a fee control method for a fee control circuit breaker.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A fee control circuit of a fee control circuit breaker, comprising an A-phase outlet terminal A, an L-phase outlet terminal L and an N-phase outlet terminal N of a fee control circuit breaker QF; wherein the L-phase outlet terminal L is electrically connected to the N-phase outlet terminal N through a power coil KA2 of an intermediate relay KA, and the A-phase outlet terminal A is electrically connected to a fixed end of an action contact KA1 of the intermediate relay KA, one end of an alarm switch PJ3 of an electric energy meter PJ and one end of a power indicator light HW; the action contact KA1 is a normally open and normally closed contact; the opening and closing ends of the action contact KA1 correspond to one end provided with a closing indicator light HR and a breaking indicator light HG, respectively The alarm switch PJ3 is electrically connected to the N-phase outlet terminal N through the alarm indicator light HY and the buzzer HA respectively; the other end of the power indicator light HW, the other end of the closing indicator light HR and the other end of the opening indicator light HG are all electrically connected to the N-phase outlet terminal N; the 4G communication unit PJ5 of the electric energy meter PJ is communicated and connected to the main station; the electric energy meter closing unit PJ1 of the electric energy meter PJ is electrically connected to the circuit breaker closing unit QF1 of the fee-controlled circuit breaker QF, and the electric energy meter tripping unit PJ2 of the electric energy meter PJ is electrically connected to the circuit breaker tripping unit QF2 of the fee-controlled circuit breaker QF; the electric energy meter PJ.

[0009] As a further improvement, the energy meter closing unit PJ1 is connected in series with the second trip button SBS2, the first closing button SBC1 and the normally closed contact of the intermediate relay KA in sequence and then electrically connected to the circuit breaker closing unit QF1;

[0010] The energy meter trip unit PJ2 is electrically connected to the circuit breaker trip unit QF2 after the second closing button SBC2 and the first trip button SBS1 are connected in series in sequence; the first trip button SBS1 is a normally open contact; and the first closing button SBC1 is a normally closed contact.

[0011] A fee control method for a fee-controlled circuit breaker, wherein the circuit structure of the fee-controlled circuit breaker is as described in claim 2; and a remote fee control method for the fee-controlled circuit breaker fee control method is as follows:

[0012] 1.1. When the 4G communication unit PJ5 of the electric energy meter PJ receives the tripping command from the master station, the tripping unit PJ2 of the electric energy meter executes the tripping command; the tripping circuit receives the rising edge signal, and the circuit breaker tripping unit QF2 receives the rising edge signal and transmits it to the main control unit QF5 of the fee-controlled circuit breaker QF, and the fee-controlled circuit breaker QF trips;

[0013] 1.2. When the 4G communication unit PJ5 of the energy meter PJ receives the closing command from the master station, the closing unit PJ1 of the energy meter executes the closing command, so that the closing circuit receives the rising edge signal, and the circuit breaker closing unit QF1 receives the rising edge signal and transmits it to the main control unit QF5 of the fee-controlled circuit breaker QF, and the fee-controlled circuit breaker QF closes.

[0014] As a further improvement, the local fee control method of the fee control circuit breaker fee control method is as follows:

[0015] 2.1. When the first trip button SBS1 changes from normally open to normally closed, the trip circuit receives a rising edge signal, and the circuit breaker trip unit QF2 of the fee-controlled circuit breaker QF receives the rising edge signal and transmits it to the main control unit QF5 of the fee-controlled circuit breaker QF, and the fee-controlled circuit breaker trips;

[0016] 2.2. When the first closing button SBC1 changes from normally closed to normally open and then closes, the closing circuit receives the rising edge signal. The circuit breaker closing unit QF1 of the fee-controlled circuit breaker QF receives the rising edge signal and transmits it to the main control unit QF5 of the fee-controlled circuit breaker QF, and the fee-controlled circuit breaker is closed.

[0017] As a further improvement, the method for preventing misclosing of the fee-controlled circuit breaker fee-controlled method is as follows:

[0018] When the fee-controlled circuit breaker QF is in the open state and before closing, the fee-controlled circuit breaker QF is in the disconnected state, and the power supply coil KA2 of the intermediate relay KA is in the de-energized state. At this time, the normally closed contact KA4 of the intermediate relay is in the closed state, and the closing circuit is turned on, so that the fee-controlled circuit breaker completes the closing action. During this process, if the fee-controlled circuit breaker QF is in a fault state, the fee-controlled circuit breaker QF will not act. The fee-controlled circuit breaker is self-locked internally, so that it can automatically determine that the fee-controlled circuit breaker is in a tripped state before it can be closed, and it can only be opened in the closed state;

[0019] The local first closing button SBC1, the second closing button SBC2, the first tripping button SBS1 and the second tripping button SBS2 and the remote electric energy meter closing unit PJ1 and the electric energy meter tripping unit PJ2 are in the same circuit. If the electric energy meter closing unit PJ1 of the master station controls the electric energy meter PJ at the same time, the fee control circuit breaker QF cannot receive the rising edge signal. In this process, the fee control circuit breaker will not operate, avoiding safety accidents caused by simultaneous operation of the local and remote.

[0020] If the first closing button SBC1 is actuated, the remote control master station executes the opening and closing actions, and the closing circuit still cannot receive the rising edge signal, the cost-controlled circuit breaker will not be actuated during this process, thus avoiding safety accidents caused by simultaneous local and remote actions.

[0021] The beneficial effects of the present invention are:

[0022] 1. The electric energy meter with pulse output can control the opening and closing functions.

[0023] 2. It is safer and more reliable with the function of preventing false separation and false combination.

[0024] 3. Reduce the cost and difficulty of transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of an electric energy meter;

[0028] Figure 3 It is a structural diagram of the intermediate relay;

[0029] Figure 4 A schematic diagram of the circuit breaker structure. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0031] Example 1

[0032] The circuit structure of the present invention is as follows Figure 1-Figure 4 shown.

[0033] 1. Principle of remote fee control

[0034] In many cases, the output of the electric energy meter is a relay with only one set of fee control outputs, which uses a set of trip points to realize the fee control function of the fee control circuit breaker in the remote and local coexistence mode.

[0035] 1. When the energy meter receives the trip command from the master station through the PJ54G communication unit, the pulse output unit of the energy meter executes the trip command; the trip circuit receives the rising edge signal, and the fee control circuit breaker trip unit QF2 receives the rising edge signal and transmits it to the fee control circuit breaker main control unit QF5, and the fee control circuit breaker trips.

[0036] 2. When the energy meter receives the closing command from the master station through the PJ54G communication unit, the pulse output unit of the energy meter executes the closing command; the closing circuit receives the rising edge signal, and the fee-controlled circuit breaker closing unit QF1 receives the rising edge signal and transmits it to the fee-controlled circuit breaker main control unit QF5, and the fee-controlled circuit breaker closes.

[0037] 2. Principle of local cost control

[0038] 1. When the normally open contact of the trip button SBS changes from normally open to normally closed, the trip circuit receives the rising edge signal, and the fee control circuit breaker trip unit QF2 receives the rising edge signal and transmits it to the fee control circuit breaker main control unit QF5, and the fee control circuit breaker trips.

[0039] 2. When the normally closed contact of the closing button SBC changes from normally closed to normally open and then closes, the closing circuit receives the rising edge signal, and the fee-controlled circuit breaker closing unit QF1 receives the rising edge signal and transmits it to the fee-controlled circuit breaker main control unit QF5, and the fee-controlled circuit breaker closes.

[0040] 3. Principle of preventing mismatch

[0041] Anti-misconnection principle

[0042] When the fee-controlled circuit breaker is in the open state and before closing, the fee-controlled circuit breaker QF is in the disconnected state and the extended relay KA2 is in the power-off state. At this time, the normally closed contact KA4 of the intermediate relay is in the closed state, and the closing circuit is connected, so that the fee-controlled circuit breaker completes the closing action. During this process, if the fee-controlled circuit breaker is in a fault state (that is, neither the open state nor the closed state), the fee-controlled circuit breaker QF will not act. The internal self-locking of the fee-controlled circuit breaker can automatically determine that the fee-controlled circuit breaker is in a tripped state before it can be closed, and it can only be opened in the closed state.

[0043] In addition, the local and remote are in the same circuit. Assuming that the master station controls PJI to close the circuit, while operating either the opening button or the closing button, the fee-controlled circuit breaker QF1 cannot receive the rising edge signal. In this process, the fee-controlled circuit breaker will not operate, avoiding safety accidents caused by simultaneous operation of the local and remote terminals.

[0044] Assuming that the closing button SBC is actuated and the remote control master station performs the opening and closing actions, the closing circuit still cannot receive the rising edge signal. In this process, the fee-controlled circuit breaker will not be actuated, thus avoiding safety accidents caused by simultaneous local and remote actions.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A fee control method for a fee-controlled circuit breaker, characterized in that: The circuit structure of the fee control circuit breaker comprises an A-phase outlet terminal (A), an L-phase outlet terminal (L) and an N-phase outlet terminal (N) of the fee control circuit breaker (QF); wherein the L-phase outlet terminal (L) is electrically connected to the N-phase outlet terminal (N) through a power coil (KA2) of an intermediate relay (KA), and the A-phase outlet terminal (A) is electrically connected to a fixed end of an action contact (KA1) of the intermediate relay (KA), one end of an alarm switch (PJ3) of an electric energy meter (PJ) and one end of a power indicator light (HW); the action contact (KA1) is a normally open and normally closed contact; the opening and closing ends of the action contact (KA1) are respectively provided with one end of a closing indicator light (HR) and a breaking indicator light (HG), and the alarm switch (PJ3) is electrically connected to the N-phase outlet terminal (N) through an alarm indicator light (HY) and a buzzer (HA); the other end of the power indicator light (HW), the other end of the closing indicator light (HR) and the other end of the breaking indicator light (HG) are respectively provided with a closing indicator light (HR) and a breaking indicator light (HG). The ends are electrically connected to the N-phase outgoing line terminal (N); the 4G communication unit (PJ5) of the electric energy meter (PJ) is connected to the master station for communication; the electric energy meter closing unit (PJ1) of the electric energy meter (PJ) is electrically connected to the circuit breaker closing unit (QF1) of the fee-controlled circuit breaker (QF), and the electric energy meter tripping unit (PJ2) of the electric energy meter (PJ) is electrically connected to the circuit breaker tripping unit (QF2) of the fee-controlled circuit breaker (QF); the electric energy meter closing unit (PJ1) is sequentially connected in series with the second tripping button (SBS2), the first closing button (SBC1) and the normally closed contact (KA4) of the intermediate relay (KA), and then electrically connected to the circuit breaker closing unit (QF1); The energy meter trip unit (PJ2) is connected in series with the second closing button (SBC2) and the first trip button (SBS1) and then electrically connected to the circuit breaker trip unit (QF2); the first trip button (SBS1) is a normally open contact; the first closing button (SBC1) is a normally closed contact; The remote fee control method of the fee control circuit breaker fee control method is as follows: 1.1) When the energy meter (PJ) receives the tripping command from the master station through the 4G communication unit (PJ5), the energy meter tripping unit (PJ2) executes the tripping command; the tripping circuit receives the rising edge signal, and the circuit breaker tripping unit (QF2) receives the rising edge signal and transmits it to the main control unit (QF5) of the fee control circuit breaker (QF), and the fee control circuit breaker (QF) trips; 1.2) When the energy meter (PJ) receives the closing command from the master station through the 4G communication unit (PJ5), the energy meter closing unit (PJ1) executes the closing command; the closing circuit receives the rising edge signal, and the circuit breaker closing unit (QF1) receives the rising edge signal and transmits it to the main control unit (QF5) of the fee-controlled circuit breaker (QF), and the fee-controlled circuit breaker (QF) closes; The local fee control method of the fee control circuit breaker fee control method is as follows: 2.1) When the first trip button (SBS1) changes from normally open to normally closed, the trip circuit receives a rising edge signal, and the circuit breaker trip unit (QF2) of the fee-controlled circuit breaker (QF) receives the rising edge signal and transmits it to the main control unit (QF5) of the fee-controlled circuit breaker (QF), and the fee-controlled circuit breaker trips; 2.2) When the first closing button (SBC1) changes from normally closed to normally open and then closes, the closing circuit receives the rising edge signal, and the circuit breaker closing unit (QF1) of the fee-controlled circuit breaker (QF) receives the rising edge signal and transmits it to the main control unit (QF5) of the fee-controlled circuit breaker (QF), and the fee-controlled circuit breaker is closed; The method for preventing misclosing of the fee-controlled circuit breaker fee-controlled method is as follows: When the fee-controlled circuit breaker (QF) is in the open state and before closing, the fee-controlled circuit breaker (QF) is in the disconnected state, and the power coil (KA2) of the intermediate relay (KA) is in the de-energized state. At this time, the normally closed contact (KA4) of the intermediate relay is in the closed state, and the closing circuit is turned on, so that the fee-controlled circuit breaker completes the closing action. During this process, if the fee-controlled circuit breaker (QF) is in a fault state, the fee-controlled circuit breaker (QF) will not act. The fee-controlled circuit breaker is internally self-locked, so that it can be closed only when it is automatically judged that the fee-controlled circuit breaker is in a tripped state, and it can only be opened when it is in the closed state; The local first closing button (SBC1), the second closing button (SBC2), the first tripping button (SBS1) and the second tripping button (SBS2) and the remote electric energy meter closing unit (PJ1) and electric energy meter tripping unit (PJ2) are in the same circuit. If the electric energy meter closing unit (PJ1) of the master station controls the electric energy meter (PJ) at the same time, the fee control circuit breaker (QF) cannot receive the rising edge signal. In this process, the fee control circuit breaker will not operate, avoiding safety accidents caused by simultaneous operation of the local and remote. If the first closing button (SBC1) is actuated, the remote control master station executes the opening and closing actions, and the closing circuit still cannot receive the rising edge signal, the cost-controlled circuit breaker will not be actuated during this process, avoiding safety accidents caused by simultaneous local and remote actions.

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