New energy storage system power receiving facility test power supply

Abstract

The utility model relates to the technical field of new energy storage, in particular to a test power supply for a power receiving facility of a new energy storage system, which comprises a low-voltage input unit, an isolation step-up transformer cabinet and a high-voltage output unit, the low-voltage input unit is connected with the isolation step-up transformer cabinet, and the isolation step-up transformer cabinet is connected with the high-voltage output unit; the low-voltage input unit comprises a pre-magnetizing control cabinet and a low-voltage outgoing line cabinet, the pre-magnetizing control cabinet is connected with the low-voltage outgoing line cabinet, the low-voltage outgoing line cabinet is connected with the isolation boosting transformer cabinet, a low voltage of 0.44 KV / 60 Hz is input to the isolation boosting transformer cabinet through the low-voltage outgoing line cabinet, and at the moment when the isolation boosting transformer cabinet is conducted to work, a large current flows into the pre-magnetizing control cabinet, so that the isolation boosting transformer cabinet is started to work. The isolation boosting transformer cabinet is transited to a normal working state, low voltage is boosted into high voltage, and boosted voltage realizes external power supply output through the high-voltage output unit, so that the isolation boosting transformer cabinet can be used for testing and inspection after a ship is additionally provided with a shore power receiving facility, supplying power to a power receiving device and inspecting whether the ship power receiving device meets factory requirements or not.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy storage technology, in particular to a new energy storage system power receiving facility test power supply. Background Art

[0002] According to the "Promotion Plan for the Reconstruction of Power Receiving Facilities for the New Energy Storage System in the Yangtze River Economic Belt", it will take about 5 years to complete the transformation of the power receiving facilities for the new energy storage system. The power receiving facilities of the new energy storage system mainly refer to those equipment and systems used to receive, convert and distribute electric energy to ensure that the energy storage system can operate normally and meet the needs of various application scenarios.

[0003] The existing power supply cannot supply power to ships that have newly installed shore power receiving facilities but have not been tested and inspected for power supply safety reasons. In addition, most shipyards do not have the conditions for testing and inspection, which seriously affects the testing and inspection and evidence collection work after the installation of shore power system receiving facilities on ships. Summary of the invention

[0004] The purpose of the utility model is to provide a power supply for testing the power receiving facilities of a new energy storage system. The existing power supply cannot supply power to ships that have newly installed shore power receiving facilities but have not been tested and inspected due to power supply safety considerations, and most shipyards currently do not have the conditions for testing and inspection, which seriously affects the testing and inspection and evidence collection work after the ships are equipped with shore power system power receiving facilities.

[0005] To achieve the above-mentioned objectives, the utility model provides a new energy storage system power receiving facility test power supply, including a low-voltage input unit, an isolated boost transformer cabinet and a high-voltage output unit, wherein the low-voltage input unit is connected to the isolated boost transformer cabinet, and the isolated boost transformer cabinet is connected to the high-voltage output unit; the low-voltage input unit includes a pre-magnetization control cabinet and a low-voltage output cabinet, wherein the pre-magnetization control cabinet is connected to the low-voltage output cabinet, and the low-voltage output cabinet is connected to the isolated boost transformer cabinet.

[0006] Among them, the pre-magnetization control cabinet includes a current limiting circuit, and the current limiting circuit includes a resistor R and a circuit breaker QF2. The resistor R is electrically connected to the circuit breaker QF2, and the circuit breaker QF2 is electrically connected to the low-voltage outlet cabinet.

[0007] Among them, the low-voltage outlet cabinet includes a low-voltage protection circuit, which includes a circuit breaker QF1, an isolating switch QS1, an isolating switch QS2, a transformer T1 and a contactor KM. The first end of the circuit breaker QF1 is electrically connected to the circuit breaker QF2, and the second end of the circuit breaker QF1 is electrically connected to the resistor R; the first end of the isolating switch QS1 is electrically connected to the first end of the circuit breaker QF1, the second end of the isolating switch QS1 is electrically connected to the first end of the transformer T1, and the third end of the isolating switch QS1 is electrically connected to the third end of the isolating switch QS2; the first end of the isolating switch QS2 is electrically connected to the first end of the circuit breaker QF1, and the second end of the isolating switch QS2 is electrically connected to the first end of the transformer T1; the contactor KM is electrically connected to the second end of the transformer T1; the second end of the circuit breaker QF1 is electrically connected to the isolation step-up transformer cabinet.

[0008] Among them, the isolated step-up transformer cabinet includes a step-up circuit, and the step-up circuit includes a transformer T2. The first end of the transformer T2 is electrically connected to the high-voltage output unit, the second end of the transformer T2 is electrically connected to the second end of the circuit breaker QF1, and the third end of the transformer T2 is electrically connected to the high-voltage output unit.

[0009] Among them, the high-voltage output unit includes a grounding resistor cabinet, a cable lifting cabinet and a high-voltage output cabinet. The grounding resistor cabinet is electrically connected to the third end of the transformer T2, the cable lifting cabinet is electrically connected to the first end of the transformer T2, and the high-voltage output cabinet is connected to the cable lifting cabinet.

[0010] Among them, the grounding resistor cabinet includes a grounding protection circuit, and the grounding protection circuit includes a resistor R0 and a current transformer TA. The first end of the resistor R0 is electrically connected to the third end of the transformer T2, and the second end of the resistor R0 is electrically connected to the current transformer TA.

[0011] Among them, the cable lifting cabinet includes a high-voltage connection circuit, which includes a fuse FU, an indicator J1 and a lightning arrester FV1. The fuse FU is electrically connected to the first end of the transformer T2; the indicator J1 is electrically connected to the first end of the transformer T2; the lightning arrester FV1 is electrically connected to the first end of the transformer T2; the high-voltage outlet cabinet is electrically connected to the fuse FU.

[0012] Among them, the high-voltage output cabinet includes a high-voltage output circuit, which includes a circuit breaker QF3, a lightning arrester FV2, an indicator J2 and an isolating switch QS3. The first end of the circuit breaker QF3 is electrically connected to the fuse FU, and the second end of the circuit breaker QF3 is electrically connected to the lightning arrester FV2; the indicator J2 is electrically connected to the second end of the circuit breaker QF3; and the isolating switch QS3 is electrically connected to the second end of the circuit breaker QF3.

[0013] The utility model discloses a new energy storage system power receiving facility test power supply. When in use, a low voltage of 0.44KV / 60Hz is input into the low voltage outlet cabinet, and the transformer T1, the isolating switch QS1, the isolating switch QS2 and the contactor KM are controlled by the circuit breaker QF1, and the input low voltage electric energy is provided to the isolation boost transformer cabinet. At the moment when the isolation boost transformer cabinet is turned on, a large current will be generated, and the large current will flow into the pre-magnetization control cabinet to open the circuit breaker QF2. At the same time, the resistor R will limit the large current, so that the Transformer T2 transitions to normal working state, and the input low voltage 0.44KV / 60Hz is boosted to 6.6KV / 60Hz through the transformer T2. During the process of outputting the boosted voltage to the cable lifting cabinet, the potential is stabilized by the grounding resistance cabinet, and the high voltage is input to the high voltage outlet cabinet through the cable lifting cabinet. The external power output and safety circuit interlocking control are realized through the high voltage outlet cabinet, so that it can be used for testing and inspection after the ship is equipped with shore power receiving facilities, supplying power to the receiving device, and inspecting whether the ship's receiving device meets the factory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a principle block diagram of a test power supply for a power receiving facility of a new energy storage system of the utility model.

[0016] Figure 2 It is a structural schematic diagram of a low-voltage outlet cabinet of the utility model.

[0017] Figure 3 The utility model is a circuit schematic diagram of an isolated boost transformer cabinet.

[0018] Figure 4 It is the safety control loop of the new energy storage system at the container berth.

[0019] Figure 5 It is the safety control loop of the new energy storage system for ro-ro berths and bulk cargo berths.

[0020] In the figure: 1- low voltage input unit, 2- isolation step-up transformer cabinet, 3- high voltage output unit, 101- pre-magnetization control cabinet, 102- low voltage outgoing line cabinet, 301- grounding resistance cabinet, 302- cable lifting cabinet, 303- high voltage outgoing line cabinet. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] The first embodiment of the present application is:

[0023] See also Figures 1 to 3 ,in Figure 1 It is a principle block diagram of the power supply for testing the power receiving facilities of the new energy storage system of the utility model; Figure 2 It is a structural schematic diagram of the low-voltage outlet cabinet of the utility model; Figure 3 The utility model is a circuit schematic diagram of an isolated boost transformer cabinet.

[0024] The utility model provides a power supply for testing power receiving facilities of a new energy storage system: comprising a low voltage input unit 1, an isolated boost transformer cabinet 2 and a high voltage output unit 3, wherein the low voltage input unit 1 is connected to the isolated boost transformer cabinet 2, and the isolated boost transformer cabinet 2 is connected to the high voltage output unit 3. The low voltage input unit 1 inputs low voltage to the isolated boost transformer cabinet 2, boosts the low voltage to high voltage through the isolated boost transformer cabinet 2, transmits the high voltage to the high voltage output unit 3, and outputs the high voltage to external facilities through the high voltage output unit 3.

[0025] Furthermore, the low-voltage input unit 1 includes a pre-magnetization control cabinet 101 and a low-voltage outlet cabinet 102 , the pre-magnetization control cabinet 101 is connected to the low-voltage outlet cabinet 102 , and the low-voltage outlet cabinet 102 is connected to the isolation step-up transformer cabinet 2 . The pre-magnetization control cabinet 101 is internally installed with a Siemens PLC controller and control system. The panel of the pre-magnetization control cabinet 101 is provided with an HMI touch screen, which can control the shore power supply system in the system remote control state. The pre-magnetization control cabinet 101 mainly plays the role of current limiting transition. When the isolation boost transformer cabinet 2 is turned on, it is equivalent to a short-circuit state, and a large current will be generated. The large current will be added to the pre-magnetization control cabinet 101, and the current will be limited by the control circuit in the pre-magnetization control cabinet 101, so that the isolation boost transformer cabinet 2 gradually transitions to a normal working state; the low-voltage outlet cabinet 102 is internally installed with a main circuit, so that the low voltage is input into the isolation boost transformer cabinet 2 through the low-voltage outlet cabinet 102, and the low-voltage outlet cabinet 102 plays the role of distributing electric energy and directly connecting the isolation boost transformer cabinet 2, thereby improving the efficiency and reliability of power transmission.

[0026] Furthermore, the pre-magnetization control cabinet 101 includes a current limiting circuit, which includes a resistor R and a circuit breaker QF2, wherein the resistor R is electrically connected to the circuit breaker QF2, and the circuit breaker QF2 is electrically connected to the low-voltage outlet cabinet 102. The resistor R is a limiting resistor, which limits the large current generated by the isolation step-up transformer cabinet 2; the circuit breaker QF2 plays a role in short-circuit protection.

[0027] Furthermore, the low-voltage outlet cabinet 102 includes a low-voltage protection circuit, which includes a circuit breaker QF1, an isolating switch QS1, an isolating switch QS2, a transformer T1 and a contactor KM. The first end of the circuit breaker QF1 is electrically connected to the circuit breaker QF2, and the second end of the circuit breaker QF1 is electrically connected to the resistor R; the first end of the isolating switch QS1 is electrically connected to the first end of the circuit breaker QF1, the second end of the isolating switch QS1 is electrically connected to the first end of the transformer T1, and the third end of the isolating switch QS1 is electrically connected to the third end of the isolating switch QS2; the first end of the isolating switch QS2 is electrically connected to the first end of the circuit breaker QF1, and the second end of the isolating switch QS2 is electrically connected to the first end of the transformer T1; the contactor KM is electrically connected to the second end of the transformer T1; the second end of the circuit breaker QF1 is electrically connected to the isolation step-up transformer cabinet 2. The circuit breaker QF1 provides short circuit protection, overload protection and undervoltage protection for the circuit, so that the input low voltage 0.44KV / 60Hz is input into the isolation step-up transformer cabinet 2 for step-up; the isolation switch QS1, the isolation switch QS2, the transformer T1 and the contactor KM are all controlled by the circuit breaker QF1 to protect the equipment and system.

[0028] Furthermore, the isolated step-up transformer cabinet 2 includes a step-up circuit, which includes a transformer T2, a first end of the transformer T2 is electrically connected to the high-voltage output unit 3, a second end of the transformer T2 is electrically connected to the second end of the circuit breaker QF1, and a third end of the transformer T2 is electrically connected to the high-voltage output unit 3. The transformer T2 is a three-phase transformer, which functions to increase the low voltage 0.44KV / 60Hz to the high voltage 6.6KV / 60Hz.

[0029] Furthermore, the high-voltage output unit 3 includes a grounding resistor cabinet 301, a cable lifting cabinet 302 and a high-voltage outlet cabinet 303. The grounding resistor cabinet 301 is electrically connected to the third end of the transformer T2, the cable lifting cabinet 302 is electrically connected to the first end of the transformer T2, and the high-voltage outlet cabinet is connected to the cable lifting cabinet 302. The grounding resistor cabinet 301 plays a grounding role, so that the neutral point of the high-voltage output part is grounded through high resistance, improving the power supply reliability and limiting overvoltage; the cable lifting cabinet 302 is used for connecting the cable to the busbar, and the bottom of the cabinet has a cable clamp for fixing the cable, and can be equipped with protection equipment according to the customer; the high-voltage outlet cabinet 303 is installed with two high-voltage sockets on the outside of the container, and the high-voltage outlet cabinet 303 is used to realize external power output and safety circuit interlocking control.

[0030] Furthermore, the grounding resistor cabinet 301 includes a grounding protection circuit, which includes a resistor R0 and a current transformer TA, wherein the first end of the resistor R0 is electrically connected to the third end of the transformer T2, and the second end of the resistor R0 is electrically connected to the current transformer TA. The resistor R0 is a grounding resistor, so that the neutral point of the output part of the transformer T2 is grounded through the resistor R0 and the current transformer TA; the current transformer TA plays the role of a protection circuit.

[0031] Furthermore, the cable lifting cabinet 302 includes a high-voltage connection circuit, which includes a fuse FU, an indicator J1 and a lightning arrester FV1. The fuse FU is electrically connected to the first end of the transformer T2; the indicator J1 is electrically connected to the first end of the transformer T2; the lightning arrester FV1 is electrically connected to the first end of the transformer T2; and the high-voltage outlet cabinet 303 is electrically connected to the fuse FU. The fuse FU plays a role in short-circuit protection and overload protection for the circuit; the indicator J1 monitors and warns the operation of the cable in real time; the lightning arrester FV1 plays a role in limiting overvoltage and protecting the circuit.

[0032] Furthermore, the high-voltage outlet cabinet 303 includes a high-voltage output circuit, which includes a circuit breaker QF3, a lightning arrester FV2, an indicator J2 and an isolating switch QS3. The first end of the circuit breaker QF3 is electrically connected to the fuse FU, and the second end of the circuit breaker QF3 is electrically connected to the lightning arrester FV2; the indicator J2 is electrically connected to the second end of the circuit breaker QF3; and the isolating switch QS3 is electrically connected to the second end of the circuit breaker QF3. The circuit breaker QF3 plays a short-circuit protection role; the lightning arrester FV2 plays a role in limiting overvoltage and protecting the circuit; the indicator J2 performs real-time monitoring and warning of the line; the isolating switch QS3 plays an isolation role and cooperates with the circuit breaker QF3 to jointly realize the control and protection of the circuit.

[0033] When a new energy storage system power receiving facility test power supply of this embodiment is used, a low voltage of 0.44KV / 60Hz is input into the low voltage outlet cabinet 102, and the transformer T1, the isolating switch QS1, the isolating switch QS2 and the contactor KM are controlled by the circuit breaker QF1, and the input low voltage electric energy is provided to the isolation boost transformer cabinet 2. At the moment when the isolation boost transformer cabinet 2 is turned on, a large current will be generated, and the large current will flow into the pre-magnetization control cabinet 101, and the circuit breaker QF2 will be opened. At the same time, the resistor R will limit the large current, so that the transformer T2 transitions to normal working state, and the input low voltage 0.44KV / 60Hz is boosted to 6.6KV / 60Hz through the transformer T2. During the process of outputting the boosted voltage to the cable lifting cabinet 302, the potential is stabilized by the grounding resistor cabinet 301. The high voltage is input to the high voltage outlet cabinet 303 through the cable lifting cabinet 302, and the external power output and safety circuit interlocking control are realized through the high voltage outlet cabinet 303, so that it can be used for testing and inspection after the shore power receiving facilities are installed on the ship, supplying power to the power receiving device, and inspecting whether the ship's power receiving device meets the factory requirements.

[0034] See also Figure 4 , Figure 4 It is the safety control circuit of the new energy storage system of the container berth. In the figure: 1-shore control circuit, 2-ship control circuit, 3-onshore output circuit breaker undervoltage protection, 4-onshore safety protection circuit, 5-onshore grounding switch, 6-onboard circuit breaker undervoltage protection, 7-onboard safety protection circuit, 8-onboard grounding switch, 9-onshore emergency stop device (contact), 10-onboard emergency stop device (contact), 11-onshore emergency stop device (switch, manual, two groups), 12-onboard emergency stop device (switch, manual, two groups), 13-equipotential monitoring equipment, 14-equipotential monitoring conduction equipment.

[0035] See also Figure 5 , Figure 5 It is the safety control circuit of the new energy storage system of the ro-ro berth and the bulk berth. In the figure: 1-shore control circuit, 2-ship control circuit, 3-onshore output circuit breaker undervoltage protection, 4-onshore safety protection circuit, 5-onshore grounding switch, 6-onboard circuit breaker undervoltage protection, 7-onboard safety protection circuit, 8-onboard grounding switch, 9-onshore emergency stop device (contact), 10-onboard emergency stop device (contact), 11-onshore emergency stop device (switch, manual, two groups), 12-onboard emergency stop device (switch, manual, two groups), 13-equipotential monitoring equipment, 14-equipotential monitoring conduction equipment.

[0036] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A power supply for testing power receiving facilities of a new energy storage system, characterized in that: It includes a low voltage input unit, an isolated boost transformer cabinet and a high voltage output unit, wherein the low voltage input unit is connected to the isolated boost transformer cabinet, and the isolated boost transformer cabinet is connected to the high voltage output unit; The low-voltage input unit comprises a pre-magnetization control cabinet and a low-voltage outlet cabinet, the pre-magnetization control cabinet is connected to the low-voltage outlet cabinet, and the low-voltage outlet cabinet is connected to the isolation step-up transformer cabinet.

2. The new energy storage system power receiving facility test power supply according to claim 1, characterized in that: The pre-magnetization control cabinet includes a current limiting circuit, which includes a resistor R and a circuit breaker QF2. The resistor R is electrically connected to the circuit breaker QF2, and the circuit breaker QF2 is electrically connected to the low-voltage outlet cabinet.

3. The new energy storage system power receiving facility test power supply according to claim 2, characterized in that: The low-voltage outlet cabinet includes a low-voltage protection circuit, which includes a circuit breaker QF1, an isolating switch QS1, an isolating switch QS2, a transformer T1 and a contactor KM. The first end of the circuit breaker QF1 is electrically connected to the circuit breaker QF2, and the second end of the circuit breaker QF1 is electrically connected to the resistor R; the first end of the isolating switch QS1 is electrically connected to the first end of the circuit breaker QF1, the second end of the isolating switch QS1 is electrically connected to the first end of the transformer T1, and the third end of the isolating switch QS1 is electrically connected to the third end of the isolating switch QS2; the first end of the isolating switch QS2 is electrically connected to the first end of the circuit breaker QF1, and the second end of the isolating switch QS2 is electrically connected to the first end of the transformer T1; the contactor KM is electrically connected to the second end of the transformer T1; the second end of the circuit breaker QF1 is electrically connected to the isolation step-up transformer cabinet.

4. The new energy storage system power receiving facility test power supply according to claim 3, characterized in that: The isolated step-up transformer cabinet includes a step-up circuit, which includes a transformer T2. A first end of the transformer T2 is electrically connected to the high-voltage output unit, a second end of the transformer T2 is electrically connected to the second end of the circuit breaker QF1, and a third end of the transformer T2 is electrically connected to the high-voltage output unit.

5. The new energy storage system power receiving facility test power supply according to claim 4, characterized in that: The high-voltage output unit includes a grounding resistor cabinet, a cable lifting cabinet and a high-voltage output cabinet. The grounding resistor cabinet is electrically connected to the third end of the transformer T2, the cable lifting cabinet is electrically connected to the first end of the transformer T2, and the high-voltage output cabinet is connected to the cable lifting cabinet.

6. The new energy storage system power receiving facility test power supply according to claim 5, characterized in that: The grounding resistor cabinet includes a grounding protection circuit, which includes a resistor R0 and a current transformer TA. The first end of the resistor R0 is electrically connected to the third end of the transformer T2, and the second end of the resistor R0 is electrically connected to the current transformer TA.

7. The new energy storage system power receiving facility test power supply according to claim 5, characterized in that: The cable lifting cabinet includes a high-voltage connection circuit, which includes a fuse FU, an indicator J1 and a lightning arrester FV1. The fuse FU is electrically connected to the first end of the transformer T2; the indicator J1 is electrically connected to the first end of the transformer T2; the lightning arrester FV1 is electrically connected to the first end of the transformer T2; the high-voltage outlet cabinet is electrically connected to the fuse FU.

8. The new energy storage system power receiving facility test power supply according to claim 7, characterized in that: The high-voltage output cabinet includes a high-voltage output circuit, which includes a circuit breaker QF3, a lightning arrester FV2, an indicator J2 and an isolating switch QS3. The first end of the circuit breaker QF3 is electrically connected to the fuse FU, and the second end of the circuit breaker QF3 is electrically connected to the lightning arrester FV2; the indicator J2 is electrically connected to the second end of the circuit breaker QF3; and the isolating switch QS3 is electrically connected to the second end of the circuit breaker QF3.

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