Control circuit applied to optical storage system

Abstract

The utility model relates to the technical field related to circuit design, in particular to a control circuit applied to an optical storage system, which comprises an emergency stop button, a cabinet emergency stop circuit, a battery cabinet auxiliary source, a photovoltaic combiner box auxiliary source and a cabinet self auxiliary source, the scram button comprises a cabinet scram button and a control room scram button, the cabinet scram button and the control room scram button form a scram detection circuit, and scram detection signals of the scram detection circuit comprise a relay control alternating current circuit breaker, a generator input circuit breaker, a battery circuit breaker and a load circuit breaker. The light ratio PCS and MPPT are used for synchronously controlling a photovoltaic combiner box and a battery cabinet. According to the control circuit applied to the optical storage system, the circuit design supports external sudden stop of a control room, all power input sources are stopped when the external sudden stop is pressed down, and when a sudden stop circuit is disconnected due to a fire disaster, a cabinet can be completely powered off to achieve a protection effect.

Description

Technical Field

[0001] The utility model relates to the technical field related to circuit design, and in particular to a control circuit applied to a photoelectric storage system. Background Art

[0002] Photovoltaic energy storage equipment generally contains a battery cabinet, and the battery and the photovoltaic combiner box are connected in series. In order to prevent a fire in the energy storage equipment or an emergency situation where the circuit cannot be cut off in time and a dangerous situation occurs, an emergency button will be set on the cabinet. The emergency button controls the emergency stop circuit. The emergency stop circuit is a common safety device used to quickly cut off the power supply in an emergency to protect the safety of personnel and equipment and minimize the damage caused by the accident. In order to enable the battery cabinet and the photovoltaic combiner box to be disconnected at the same time, a control circuit applied to the photovoltaic storage system is particularly needed.

[0003] However, existing energy storage equipment generally has an emergency stop button on the cabinet. However, when a danger occurs, it is necessary to cut off the battery cabinet and photovoltaic and AC inputs. However, the battery cabinet and photovoltaic combiner box are not linked and need to be cut off separately. At the same time, the emergency stop button on the energy storage equipment cabinet generally supports emergency stopping the cabinet itself, but does not support the emergency stop button in the control room to close the cabinet. This will take more time to deal with the dangerous situation and easily lead to the expansion of the danger. Utility Model Content

[0004] The purpose of the utility model is to provide a control circuit applied to a photovoltaic storage system to solve the problem that the existing energy storage equipment proposed in the above background technology generally has an emergency stop button on the cabinet, but generally when a danger occurs, it is necessary to cut off the battery cabinet and photovoltaic and AC inputs, but the battery cabinet and the photovoltaic junction box are not linked and need to be cut off separately. At the same time, the emergency stop button on the energy storage equipment cabinet generally supports emergency stopping the cabinet itself, and does not support the emergency stop button in the control room to close the cabinet. This will take more time to deal with the dangerous situation and easily lead to the problem of expanding the danger.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a control circuit applied to a photovoltaic storage system, the photovoltaic storage system control circuit including an emergency stop button, a cabinet emergency stop circuit, a battery cabinet auxiliary source, a photovoltaic junction box auxiliary source and a cabinet auxiliary source, the emergency stop button including a cabinet emergency stop button and a control room emergency stop button, the cabinet emergency stop button and the control room emergency stop button constitute an emergency stop detection circuit, the emergency stop detection signal of the emergency stop detection circuit includes a relay controlling an AC circuit breaker, a generator input circuit breaker, a battery circuit breaker and a load circuit breaker, a light ratio PCS and an MPPT and synchronously controlling a photovoltaic junction box and a battery cabinet.

[0006] Preferably, the relay controls the AC circuit breaker, the generator input circuit breaker, the battery circuit breaker and the load circuit breaker, and the optical PCS and the MPPT are both installed in the cabinet to form a cabinet emergency stop circuit.

[0007] Preferably, the cabinet emergency stop button and the control room emergency stop button are connected in series, and the circuit works normally when both are closed.

[0008] Preferably, the emergency stop detection circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source, and is isolated by a diode. The cabinet emergency stop circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source.

[0009] Preferably, the emergency stop button controls the flow of the linkage circuit between the battery cabinet and the photovoltaic combiner box.

[0010] Compared with the prior art, the beneficial effect of the utility model is as follows: the control circuit applied to the photovoltaic storage system, by adding an emergency stop detection circuit to cooperate with the cabinet emergency stop button and the control room emergency stop button, the emergency stop detection circuit connects the photovoltaic junction box and the battery cabinet, and detects the circuit. When an emergency stop is required, only the emergency stop button in the control room needs to be pressed or the cabinet emergency stop circuit is burned out, which will disconnect the AC input circuit breaker, the generator input circuit breaker, the battery circuit breaker and the load circuit breaker. At the same time, the software shuts down the cabinet PCS and MPPT, and also synchronously controls the photovoltaic junction box and the battery cabinet. This circuit design supports external emergency stop in the control room. When the external emergency stop is pressed, all power input sources will be stopped. When the emergency stop line is disconnected due to fire, the cabinet can also be completely powered off to achieve a protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the emergency stop detection circuit and external control circuit of the utility model;

[0012] Figure 2 This is a schematic diagram of the emergency stop control circuit inside the cabinet of the utility model;

[0013] Figure 3 This is a schematic diagram of the emergency stop circuit of the battery cabinet of the utility model;

[0014] Figure 4 The utility model is a schematic diagram of a control circuit applied to a photovoltaic storage system. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-4 The utility model provides a technical solution: a control circuit applied to a photovoltaic storage system, the photovoltaic storage system control circuit includes an emergency stop button, a cabinet emergency stop circuit, a battery cabinet auxiliary source, a photovoltaic combiner box auxiliary source and a cabinet auxiliary source, the emergency stop button includes a cabinet emergency stop button and a control room emergency stop button, the cabinet emergency stop button and the control room emergency stop button form an emergency stop detection circuit, the emergency stop detection signal of the emergency stop detection circuit includes a relay-controlled AC circuit breaker, a generator input circuit breaker, a battery circuit breaker and a load circuit breaker, the light ratio PCS and MPPT and synchronous control photovoltaic combiner box and battery cabinet, through the emergency stop button, the cabinet emergency stop circuit, the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source in the society, first the emergency stop installation is installed in the cabinet and the control room respectively. The emergency stop button in the cabinet and the emergency stop button in the control room form an emergency stop detection circuit. They can only work normally when both are closed at the same time. As long as any of the emergency stop buttons is disconnected or burned out, the emergency stop takes effect, and the emergency stop detection signal in the emergency stop detection circuit controls the AC circuit breaker, generator input circuit breaker, battery circuit breaker and load circuit breaker through the relay, the light ratio PCS and MPPT, and also synchronously controls the photovoltaic junction box and battery cabinet. The emergency stop detection part is not disconnected, K31 is closed, the internal emergency stop and external emergency stop circuits are closed, the internal emergency stop circuit controls the circuit breaker shunt and the dry contact controls the power input circuit breaker to disconnect and MPPT, the PCS module is closed, the external emergency stop signal is disconnected, and its internal circuit is activated to disconnect the photovoltaic junction box and battery cabinet circuit breaker.

[0017] Further, the relay controls the AC circuit breaker, generator input circuit breaker, battery circuit breaker and load circuit breaker. The optical ratio PCS and MPPT are installed in the cabinet to form a cabinet emergency stop circuit.

[0018] Furthermore, the cabinet emergency stop button and the control room emergency stop button are connected in series, and the circuit works normally when both are closed.

[0019] Furthermore, the emergency stop detection circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source, and is isolated by a diode. The cabinet emergency stop circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source.

[0020] Furthermore, the emergency stop button controls the flow of the linkage circuit between the battery cabinet and the photovoltaic combiner box.

[0021] Working principle: The control circuit applied to the photovoltaic storage system first supplies power to the cabinet emergency stop circuit and emergency stop detection circuit through the auxiliary source of the battery cabinet, the auxiliary source of the photovoltaic combiner box and the auxiliary source of the cabinet itself. At the same time, the emergency stop button of the cabinet and the emergency stop button in the control room need to be closed when they work normally. They are used in series. If any one of them is disconnected, the line is disconnected and the emergency stop takes effect. Figure 1-4 The emergency stop detection part shown is not disconnected, K31 is closed, the emergency stop button of the cabinet and the emergency stop button in the control room are both closed, the internal emergency stop circuit controls the circuit breaker shunt and the dry contact controls the power input circuit breaker to disconnect and MPPT, the PCS module is turned off, the external emergency stop signal is disconnected, and its internal circuit is activated to disconnect the PV combiner box and the battery cabinet circuit breaker, and the emergency stop short-circuit cable leading to the control room is cut off. The emergency stop circuit responds, all the input circuit breakers on the cabinet side are disconnected, the PV combiner box circuit breaker is disconnected, and the battery cabinet also disconnects the internal contactor through the software.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control circuit applied to a photovoltaic storage system, characterized in that: The control circuit of the photovoltaic storage system includes an emergency stop button, a cabinet emergency stop circuit, a battery cabinet auxiliary source, a photovoltaic combiner box auxiliary source and a cabinet auxiliary source. The emergency stop button includes a cabinet emergency stop button and a control room emergency stop button. The cabinet emergency stop button and the control room emergency stop button constitute an emergency stop detection circuit. The emergency stop detection signal of the emergency stop detection circuit includes a relay-controlled AC circuit breaker, a generator input circuit breaker, a battery circuit breaker and a load circuit breaker, a light ratio PCS and MPPT, and synchronous control of the photovoltaic combiner box and the battery cabinet.

2. The control circuit for a solar energy storage system according to claim 1, characterized in that: The relay controls the AC circuit breaker, generator input circuit breaker, battery circuit breaker and load circuit breaker. The optical ratio PCS and MPPT are installed in the cabinet to form a cabinet emergency stop circuit.

3. The control circuit for a solar energy storage system according to claim 1, characterized in that: The cabinet emergency stop button and the control room emergency stop button are connected in series, and the circuit works normally when both are closed.

4. The control circuit for a photovoltaic storage system according to claim 1, characterized in that: The emergency stop detection circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source, and is isolated by a diode. The cabinet emergency stop circuit is powered by the battery cabinet auxiliary source, the photovoltaic combiner box auxiliary source and the cabinet's own auxiliary source.

5. The control circuit for a photovoltaic storage system according to claim 1, characterized in that: The emergency stop button controls the flow of the linkage circuit between the battery cabinet and the photovoltaic combiner box.

Images