Simple starting circuit of energy storage test cabinet

Abstract

The utility model discloses a simple starting circuit of an energy storage test cabinet, which belongs to the technical field of energy storage test cabinets and comprises a circuit breaker controlled in an electrified manner, the circuit breaker controlled in the electrified manner comprises a 400V tested machine circuit breaker QF2, a 690V tested machine circuit breaker QF1, a 400V accompanying test machine circuit breaker QF4, a 690V accompanying test machine circuit breaker QF3, a power input and a soft start micro circuit breaker QF5, the key points of the technical scheme are that electrified control is adopted through a circuit breaker, potential safety hazards of electricity utilization caused by manual switch closing are reduced, button switch box operation is added, a user can conveniently and accurately operate switch opening and closing on site, the use standardization of the energy storage test cabinet is improved, and the method can be used for batch construction of factory energy storage test platforms. The wire outlet end of the energy storage test cabinet is provided with a quick-plug terminal head, thereby reducing the wiring time, improving the power-on time sequence, and achieving the fool-type switching-on and switching-off operation through the interlocking protection of an internal control loop.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage test cabinet technical field more specifically, relate to a kind of energy storage test cabinet simple starting circuit. BACKGROUND

[0002] Energy storage test cabinet is mainly applied to the testing field of energy storage module, provides necessary test platform for the working condition test of energy storage module, plays a key role in industry, power and other industries related to energy storage equipment performance test, and the traditional energy storage test cabinet includes disconnecting switch Q0, incoming line switch Q2, 400V measured machine circuit breaker QF2, 690V measured machine circuit breaker QF1, 400V auxiliary measured machine circuit breaker QF4, 690V auxiliary measured machine circuit breaker QF3, soft start micro switch QF5, isolation transformer T1 and other components in electrical structure. The current of each switch and the soft start switch current size is matched according to the transformer capacity.

[0003] However, the control logic of the traditional energy storage test cabinet is as follows: manually operate to close the disconnecting switch Q0, then close QF5 for soft start, after 2-5 seconds of soft start, close the incoming line switch Q2, then break the soft start micro switch QF5, if it is a 400V system, then close the circuit breaker QF4 and QF2 in turn, if it is a 690V system, then close the circuit breaker QF3 and QF1 in turn, manually close the circuit breaker during start-up, and the user faces a large power safety risk, improper operation can cause accidents, power-on timing is required, and the power-on timing is strict, the main circuit switch must be closed after soft start, manual operation cannot guarantee correct timing every time, directly closing the main circuit can cause large excitation surge of the starting transformer to impact the system, resulting in that the switch cannot be normally closed, and the operation convenience is that the closing and opening of the switch can only be operated at close distance, when the test station is away from the energy storage test cabinet, the operation is extremely inconvenient.

[0004] Therefore, the energy storage test cabinet simple starting circuit is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to overcome the shortcomings of the prior art, the utility model aims at providing an energy storage test cabinet simple starting circuit, which uses live control for circuit breaker, reduces the power safety risk caused by manual closing of the switch, increases the button switch box operation, facilitates the user to accurately operate the switch closing and opening on site, and improves the use standardization of the energy storage test cabinet.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] A simple starting circuit for an energy storage test cabinet includes a live-controlled circuit breaker, wherein the live-controlled circuit breaker includes a 400V tested machine circuit breaker QF2, a 690V tested machine circuit breaker QF1, a 400V accompanying test machine circuit breaker QF4, a 690V accompanying test machine circuit breaker QF3, a power input, and a soft-start micro-breaker QF5;

[0008] 400V DUT circuit breaker QF2 and 690V DUT circuit breaker QF1. The circuit breakers are used in the energy storage test cabinet to control the connection between the energy storage module under test (for 400V and 690V systems, respectively) and the test circuit.

[0009] 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3, the functions of 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3 are the same as those of the tested machine circuit breaker, and they control the connection between the tested machine and the test circuit.

[0010] Reference Figure 1 - Figure 3 As shown, the power input starts to pass through the isolation switch Q0, and the isolation switch Q0 is electrically connected to the incoming line switch Q2;

[0011] The primary function of the isolating switch in this solution is to completely isolate the circuit from the power supply during equipment maintenance or overhaul. When the energy storage test cabinet requires overhaul or maintenance, or when a fault requires safe operation, disconnecting the isolating switch Q0 ensures the circuit is de-energized, ensuring operator safety. Furthermore, its connection to the incoming line switch Q2 ensures that the power supply can be supplied to subsequent circuits in an orderly manner during normal operation, and provides a reliable isolation method when the entire circuit needs to be disconnected from the power supply.

[0012] Reference Figure 1 - Figure 3 As shown, the soft-start micro-breaker QF5 is electrically connected to the incoming line switch Q2;

[0013] This solution primarily implements a soft-start function using the QF5 soft-start micro-interrupter. When the energy storage test cabinet starts, it gradually increases the voltage or current to avoid excessive circuit shock. Because some equipment in the energy storage test cabinet (such as the transformer, the device under test, and the accompanying test equipment) may be sensitive to the sudden application of full voltage or current at startup, the QF5 soft-start micro-interrupter protects these devices from the current surge during startup by slowly increasing the voltage or current, extending their service life and improving the stability of the entire energy storage test system.

[0014] Reference Figure 1 - Figure 3 As shown, the 400V test machine circuit breaker QF4 and the 400V test machine circuit breaker QF2 are connected to the incoming line switch Q2 and other related circuit components;

[0015] In this solution, in a 400V system, the 400V DUT circuit breaker QF2 controls the connection between the DUT energy storage module and the test circuit, while the 400V companion tester circuit breaker QF4 controls the connection between the companion tester and the test circuit. When faults such as overload or short circuit occur in the circuit, these circuit breakers automatically disconnect the circuit, protecting the DUT, companion tester, and other circuit components in the 400V system. During normal testing, these circuit breakers accurately control the on / off state of the 400V circuit according to the test process, ensuring the proper conduct of the test while also guaranteeing the safety and stability of the entire 400V system.

[0016] Reference Figure 1 - Figure 3 As shown, the 690V test companion machine circuit breaker QF3 and the 690V test machine circuit breaker QF1 are connected to the incoming line switch Q2 and other related circuit components.

[0017] Reference Figure 1 - Figure 3 As shown, the 690V accompanying test machine circuit breaker QF3 and the 690V tested machine circuit breaker QF1 and the incoming line switch Q2 control the on and off of the 690V circuit part through their respective control logics;

[0018] In a 690V system, this solution uses the 690V DUT circuit breaker QF1 to control the connection between the DUT energy storage module and the test circuit, while the 690V companion tester circuit breaker QF3 controls the connection between the companion tester and the test circuit. Similar to circuit breakers in 400V systems, these circuits can be quickly disconnected in the event of a circuit fault, protecting the equipment and components in the 690V system. Furthermore, through their respective control logic (e.g., coordinated control with other relays, contactors, and other components), the on / off state of the 690V circuit is precisely controlled, ensuring the normal operation of the 690V system during testing and the safety and reliability of the entire energy storage test cabinet at the 690V voltage level.

[0019] In summary, the present invention has the following beneficial effects:

[0020] This solution uses live control of the circuit breaker to reduce the electrical safety hazards caused by manual closing of the switch. It also adds a push-button switch box operation, which facilitates users to accurately operate the switch on-site, improves the standardization of the use of energy storage test cabinets, and can be used for the batch construction of factory energy storage test platforms. The energy storage test cabinet is equipped with a quick-connect terminal head at the output end to reduce wiring time, improve the power-on sequence, and realize fool-proof closing and opening operations through the interlock protection of the internal control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic diagram of a control circuit in this embodiment;

[0022] Figure 2 2 is a schematic diagram of the control circuit in this embodiment;

[0023] Figure 3 Schematic diagram of the emergency stop wiring circuit in this embodiment. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0026] Reference Figure 1 - Figure 3 As shown, a simple starting circuit of an energy storage test cabinet in a preferred embodiment of the present utility model includes a circuit breaker with live control, wherein the circuit breaker with live control includes a 400V tested machine circuit breaker QF2, a 690V tested machine circuit breaker QF1, a 400V accompanying tested machine circuit breaker QF4, a 690V accompanying tested machine circuit breaker QF3, a power input, and a soft start micro breaker QF5;

[0027] 400V DUT circuit breaker QF2 and 690V DUT circuit breaker QF1. The circuit breakers are used in the energy storage test cabinet to control the connection between the energy storage module under test (for 400V and 690V systems, respectively) and the test circuit.

[0028] 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3, the functions of 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3 are the same as those of the tested machine circuit breaker, and they control the connection between the tested machine and the test circuit.

[0029] Reference Figure 1 - Figure 3 As shown, the power input starts to pass through the isolation switch Q0, and the isolation switch Q0 is electrically connected to the incoming line switch Q2;

[0030] The primary function of the isolating switch in this solution is to completely isolate the circuit from the power supply during equipment maintenance or overhaul. When the energy storage test cabinet requires overhaul or maintenance, or when a fault requires safe operation, disconnecting the isolating switch Q0 ensures the circuit is de-energized, ensuring operator safety. Furthermore, its connection to the incoming line switch Q2 ensures that the power supply can be supplied to subsequent circuits in an orderly manner during normal operation, and provides a reliable isolation method when the entire circuit needs to be disconnected from the power supply.

[0031] Reference Figure 1 - Figure 3 As shown, the soft-start micro-breaker QF5 is electrically connected to the incoming line switch Q2;

[0032] This solution primarily implements a soft-start function using the QF5 soft-start micro-interrupter. When the energy storage test cabinet starts, it gradually increases the voltage or current to avoid excessive circuit shock. Because some equipment in the energy storage test cabinet (such as the transformer, the device under test, and the accompanying test equipment) may be sensitive to the sudden application of full voltage or current at startup, the QF5 soft-start micro-interrupter protects these devices from the current surge during startup by slowly increasing the voltage or current, extending their service life and improving the stability of the entire energy storage test system.

[0033] Reference Figure 1 - Figure 3 As shown, the 400V test machine circuit breaker QF4 and the 400V test machine circuit breaker QF2 are connected to the incoming switch Q2 and other related circuit components;

[0034] In this solution, in a 400V system, the 400V DUT circuit breaker QF2 controls the connection between the DUT energy storage module and the test circuit, while the 400V companion tester circuit breaker QF4 controls the connection between the companion tester and the test circuit. When a fault such as an overload or short circuit occurs in the circuit, these circuit breakers automatically disconnect the circuit, protecting the DUT, companion tester, and other circuit components in the 400V system. During normal testing, these circuit breakers accurately control the on / off state of the 400V circuit according to the test process, ensuring the proper conduct of the test while also guaranteeing the safety and stability of the entire 400V system.

[0035] Reference Figure 1 - Figure 3 As shown, the 690V test companion machine circuit breaker QF3 and the 690V test machine circuit breaker QF1 are connected to the incoming line switch Q2 and other related circuit components.

[0036] Reference Figure 1 - Figure 3 As shown, the 690V accompanying test machine circuit breaker QF3 and the 690V tested machine circuit breaker QF1 and the incoming line switch Q2 control the on and off of the 690V circuit part through their respective control logics;

[0037] In a 690V system, this solution uses the 690V DUT circuit breaker QF1 to control the connection between the DUT energy storage module and the test circuit, while the 690V companion tester circuit breaker QF3 controls the connection between the companion tester and the test circuit. Similar to circuit breakers in 400V systems, these circuits can be quickly disconnected in the event of a circuit fault, protecting the equipment and components in the 690V system. Furthermore, through their respective control logic (e.g., coordinated control with other relays, contactors, and other components), the on / off state of the 690V circuit is precisely controlled, ensuring the normal operation of the 690V system during testing and the safety and reliability of the entire energy storage test cabinet at the 690V voltage level.

[0038] Specific implementation process: workflow and principles of each part

[0039] Q2 closing operation process and principle

[0040] Initial preparation is to close the QF30 auxiliary source micro-breaker (with leakage protection function). This step provides a safe power supply guarantee for subsequent operations. The leakage protection function can prevent leakage accidents.

[0041] Trigger the power-on button

[0042] Press the grid power-on button SB1, and the coils A1 and A2 of the KA1 relay are energized. The KA1 relay controls signal transmission and conversion in the circuit.

[0043] When the KA1 relay coil is energized, the normally closed contacts 4 and 12 of KA1 are disconnected. This action causes the opening indicator light to turn off and the closing indicator light to light up, intuitively displaying the closing preparation status of the current circuit.

[0044] At the same time, KA1 and KA2 are self-locking. The self-locking function ensures that in subsequent operations, even if the trigger signal disappears (such as releasing the power-on button SB1), the circuit state can still be maintained, ensuring the stability of operation.

[0045] Soft start process

[0046] The KT1 time relay begins counting down for two seconds. It is a control element that operates according to the set time. During this time, the KM1 contactor coil is energized. The contactor is used to control the on and off of high-current circuits. After the KM1 contactor coil is energized, the main circuit transformer is soft-started. The soft-start process starts the main circuit transformer by gradually increasing the voltage or current to avoid the impact of large excitation inrush currents caused by direct closing of the circuit.

[0047] Soft start is completed and Q2 is closed

[0048] After 2 seconds, KT1's normally closed contacts 3 and 5 open, de-energizing the KM1 contactor coil and disconnecting the soft-start contactor, completing the soft-start process. Simultaneously, KT10 counts down to 1 second, closing the main switch Q2 at the end of the count. This series of timing controls, along with the coordination of the contactors and relays, precisely closes Q2 and adheres to the correct power-up sequence.

[0049] Q2 opening control process and principle: triggering the opening button

[0050] While keeping the QF30 auxiliary source micro-breaker (with leakage protection function) closed, press the grid trip button. After pressing the trip button, the KA2 coil is energized and the KA2 relay starts to operate.

[0051] Circuit state switching: KA2's normally closed contact 4 and normally closed contact 12 are disconnected. This action causes the closing control circuit to lose power. Since the closing control circuit loses power, the KA1 coil loses power, and the closing indication goes out. The opening indication is lit by the conduction of KA1's normally closed contact 4 and normally closed contact 12, intuitively showing that the circuit state has changed to the opening state. At the same time, Q2's electric operating circuit loses power, and the opening action is performed, realizing the safe opening operation of Q2.

[0052] The closing and opening operation process and principle of the 400V primary circuit breaker QF3: Closing operation, rotate the 400V primary knob. This operation energizes the coils A1 and A2 of the KA14 relay, and the normally open contacts 12 and 8 of the KA14 relay are closed. The corresponding power-on indicator lights up, indicating that the 400V primary circuit is in the closing preparation state. At the same time, the normally open contacts 5 and 9 of the electrical operation part KA14 of the QF3 circuit breaker will be closed for closing. The closing operation of the 400V primary circuit breaker QF3 is realized by controlling the electrical operation part of the circuit breaker through the relay.

[0053] Opening operation:

[0054] Turn the 400V primary knob to the other side to perform the tripping operation. At this time, the KA14 relay coils A1 and A2 lose power, the normally closed contacts 12 and 4 of KA14 are connected, and the 400V primary trip indicator light will light up, intuitively displaying the tripping status. At the same time, the normally closed contacts 1 and 9 of the electrical operation part KA14 of the QF3 circuit breaker will be closed, controlling the QF3 circuit breaker to perform the tripping action. The closing and opening operation process and principle of the 690V primary circuit breaker QF4, rotate the 690V primary knob, KA15 relay coils A1 and A2 are energized, KA15's normally open contacts 12 and 8 are closed, the corresponding power-on indicator light is on, and the display shows 690V. The 0V primary circuit is in the closing preparation state. At the same time, the normally open contact 5 and normally open contact 9 of the electrical operation part KA15 of the QF3 circuit breaker (it should be QF4 here, which may be a typo in the document) will be closed to close the circuit, realizing the closing operation of the 690V primary circuit breaker QF4. The 690V primary knob is rotated to the other side to perform the opening operation. The KA15 relay coils A1 and A2 lose power, and the normally closed contact 12 and normally closed contact 4 of KA15 are connected. The 690V primary opening indicator light will light up, indicating the opening state. At the same time, the normally closed contact 1 and normally closed contact 9 of the electrical operation part KA15 of the QF4 circuit breaker will be closed, controlling the QF4 circuit breaker to perform the opening action.

[0055] 400V secondary circuit breaker QF1 closing and opening operation process and principle:

[0056] Closing operation, rotate the 400V secondary knob, KA12 relay coils A1 and A2 are energized, KA12's normally open contacts 12 and 8 are closed, and the corresponding power-on indicator lights up, indicating that the 400V secondary circuit is in the closing preparation state. At the same time, the normally open contacts 5 and 9 of the electrical operating part KA12 of the QF1 circuit breaker will be closed to close the circuit, realizing the closing operation of the 400V secondary circuit breaker QF1. Rotate the 400V secondary knob to the other side to perform the opening operation. KA12 relay coils A1 and A2 lose power, KA12's normally closed contacts 12 and 4 are conductive, and the 400V secondary opening indicator light will light up, indicating the opening state. At the same time, the normally closed contacts 1 and 9 of the electrical operating part KA12 of the QF1 circuit breaker will be closed, controlling the QF1 circuit breaker to open. The 690V secondary circuit breaker Q F2 closing and opening operation process and principle: Rotate the 690V secondary side knob, KA13 relay coils A1 and A2 are energized, KA13's normally open contacts 12 and 8 are closed, and the corresponding power-on indicator lights up, indicating that the 690V secondary circuit is in the closing preparation state. At the same time, the normally open contacts 5 and 9 of the electrical operation part KA13 of the QF2 circuit breaker will be closed to close the circuit, realizing the closing operation of the 690V secondary circuit breaker QF2. Rotate the 690V secondary side knob to the other side to perform the opening operation. KA13 relay coils A1 and A2 are de-energized, KA13's normally closed contacts 12 and 4 are connected, and the 690V secondary side opening indicator light will light up, indicating the opening state. At the same time, the normally closed contacts 1 and 9 of the electrical operation part KA13 of the QF2 circuit breaker will be closed, controlling the QF2 circuit breaker to perform the opening action.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A simple starting circuit for an energy storage test cabinet, including a circuit breaker with electric control, characterized in that: The circuit breakers with electric control include 400V tested machine circuit breaker QF2, 690V tested machine circuit breaker QF1, 400V accompanying tested machine circuit breaker QF4, 690V accompanying tested machine circuit breaker QF3, power input, soft start micro breaker QF5; 400V DUT circuit breaker QF2 and 690V DUT circuit breaker QF1. The circuit breakers are used in the energy storage test cabinet to control the energy storage modules under test, and are respectively for connecting the 400V and 690V systems to the test circuits. 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3, the functions of 400V test machine circuit breaker QF4 and 690V test machine circuit breaker QF3 are the same as those of the tested machine circuit breaker, and they control the connection between the tested machine and the test circuit.

2. The simple starting circuit of the energy storage test cabinet according to claim 1, characterized in that: The power input initially passes through the isolation switch Q0 , and the isolation switch Q0 is electrically connected to the incoming switch Q2 .

3. The simple starting circuit of the energy storage test cabinet according to claim 1, characterized in that: The soft-start micro-breaker QF5 is electrically connected to the incoming line switch Q2.

4. The simple starting circuit of the energy storage test cabinet according to claim 1, characterized in that: The 400V test companion machine circuit breaker QF4 and the 400V test machine circuit breaker QF2 are connected to the incoming line switch Q2 and other related circuit components.

5. The simple starting circuit of the energy storage test cabinet according to claim 1, characterized in that: The 690V test companion machine circuit breaker QF3 and the 690V test machine circuit breaker QF1 are connected to the incoming line switch Q2 and other related circuit components.

6. The simple starting circuit of the energy storage test cabinet according to claim 1, characterized in that: The 690V test companion machine circuit breaker QF3, the 690V test machine circuit breaker QF1 and the incoming line switch Q2 control the on and off of the 690V circuit part through their respective control logics.

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