Energy storage system safety protection system

Abstract

The utility model provides a safety protection system for an energy storage system, which belongs to the field of energy storage system safety control technology, including an electrical fire protection module, a relay protection module and a monitoring module; an energy storage unit, a current conversion and boosting unit, a high-voltage transformer, and a high-voltage charging and discharging interval of the energy storage system, the energy storage unit is connected to the current conversion and boosting unit, the current conversion and boosting unit is connected to the high-voltage transformer, and the high-voltage transformer is connected to a high-voltage charging and discharging interval of a high-voltage switch station; the electrical fire protection module includes a fire control module, and the fire control module is connected to a number of fire alarm controllers; the battery compartment and the inverter and boosting compartment are both equipped with fire alarm controllers; the monitoring module is connected to the relay protection module and the electrical fire protection module. The utility model realizes distributed fire monitoring in each compartment to prevent the spread of fire, and when a fire or fault occurs, the fault point is removed separately through the monitoring module to ensure the stable operation of the emergency power supply base and improve the power supply efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage system safety control, and specifically relates to an energy storage system safety protection system. Background Art

[0002] The emergency power supply base is a new form of energy, also known as an energy storage system, that supplements the power supply of the power system through a large number of battery modularization assistance. The stable operation of the energy storage system can provide reliable emergency guarantees for the power network. Most of the existing systems use the battery manager BMS and the software monitoring platform for safety control. The battery manager BMS detects the battery cells and reports to the software monitoring platform. Although this method can grasp the operating status of the battery cells to a certain extent, it cannot detect the overall safety status of the emergency power supply base. Even if a fault is found, the entire emergency power supply base needs to be disabled, and the fault point cannot be removed separately. The requirements for completely trouble-free operation are relatively high, and the power supply efficiency of the emergency power supply base is low, and the actual application effect is not good. In addition, the current proportion of battery-induced fire accidents is relatively high. Once a fire occurs, if it cannot be controlled in time, it will cause the spread of the fire in the entire electrochemical base. On the other hand, it will affect the use of the overall power network and the stable operation of the power network.

[0003] In summary, the overall security of emergency power supply bases as a form of supplement to the power network is not high.

[0004] This is a shortcoming of the prior art. Therefore, it is very necessary to provide a safety protection system for an energy storage system to address the above-mentioned defects in the prior art. Summary of the invention

[0005] In view of the defect of the prior art that the emergency power supply base as a supplement to the power network is not generally safe, the utility model provides an energy storage system safety protection system to solve the above technical problems.

[0006] The utility model provides an energy storage system safety protection system, including an electrical fire protection module, a relay protection module and a monitoring module;

[0007] The energy storage system includes a battery compartment, an inverter booster compartment, an electrical secondary compartment, a high-voltage transformer compartment, and a high-voltage switch station;

[0008] The battery compartment is provided with a plurality of energy storage units, the inverter boost compartment is provided with a current conversion boost unit, the high-voltage transformer compartment is provided with a high-voltage transformer, the high-voltage switch station includes a plurality of high-voltage charging and discharging intervals, the energy storage unit is connected to the current conversion boost unit, the current conversion boost unit is connected to the high-voltage transformer, and the high-voltage transformer is connected to a high-voltage charging and discharging interval of the high-voltage switch station;

[0009] The electrical fire protection module includes a fire control unit, which is connected to a number of fire alarm controllers;

[0010] The fire control unit is installed in the electrical secondary compartment, and the battery compartment and inverter booster compartment are equipped with fire alarm controllers;

[0011] The relay protection module includes a plurality of contactors, a plurality of circuit breakers, a plurality of optical differential protection units and a plurality of overcurrent protection units;

[0012] The contactor and the circuit breaker are arranged on the connection lines of each energy storage unit and the current conversion and boosting unit, and are also arranged on the connection line between the current conversion and boosting unit and the high-voltage transformer;

[0013] Optical differential protection units and overcurrent protection units are installed in the high-voltage transformer compartment and high-voltage charging and discharging intervals;

[0014] The monitoring module is connected to the relay protection module and the electrical fire protection module.

[0015] Further, the AC boost unit includes a current converter PCS and a voltage conversion controller;

[0016] The transformer controller is connected with an isolation transformer and a step-up / step-down transformer and a metering unit;

[0017] One end of the converter PCS is connected to the energy storage unit, the other end of the converter PCS is connected to the primary side of the isolation transformer, the secondary side of the isolation transformer is connected to the primary side of the step-up / step-down transformer, and the secondary side of the step-up / step-down transformer is connected to the primary side of the high-voltage transformer.

[0018] Further, the energy storage unit includes a first power energy storage unit and a second power energy storage unit;

[0019] The converter PCS comprises a first power converter and a second power converter;

[0020] The first power energy storage unit is connected to the first power converter, and the second power energy storage unit is connected to the second power converter;

[0021] One first power converter is connected to one isolation transformer correspondingly, and two second power converters are connected to one isolation transformer correspondingly.

[0022] Furthermore, the first power storage unit adopts a 0.5 mW energy storage unit, the number of the first power storage units is 18, and the number of the first power converters is 18;

[0023] The second power energy storage unit adopts a 0.25mW energy storage unit, the number of the second power energy storage units is 4, and the number of the second power converters is 4;

[0024] The number of isolation transformers is 20, and the number of step-up / step-down transformers is 20.

[0025] Furthermore, the secondary side of each step-up / step-down transformer is connected to the first busbar through a contactor, the primary side of the high-voltage transformer is connected to the first busbar, and the secondary side of the high-voltage transformer is connected to the high-voltage switch station.

[0026] Furthermore, the first busbar is also connected to a self-use transformer;

[0027] The primary side of the self-use transformer is connected to the first busbar, and the secondary side of the self-use transformer is connected to the in-cabin distribution box.

[0028] Furthermore, the fire alarm controller is connected with an operating status indicator light, a manual operation button, an audible and visual alarm, and a detector;

[0029] The fire alarm controller is connected to the distribution box in the cabin.

[0030] Furthermore, the detector includes a smoke detector and a heat detector.

[0031] Furthermore, a fault disconnecting device is provided in the high-voltage switch station.

[0032] Furthermore, the energy storage unit includes a battery manager BMS and a plurality of battery clusters connected in parallel, each battery cluster including a plurality of battery modules connected in series;

[0033] The battery module includes a number of battery cells;

[0034] The battery manager BMS is connected to the battery cells. The battery module is composed of battery cells connected in series or in parallel.

[0035] The beneficial effects of the utility model are:

[0036] The energy storage system safety protection system provided by the utility model can timely discover fire hazards and fire accidents in each cabin by distributing fire alarm controllers in each cabin of the emergency power supply base to prevent the spread of fire. In addition, when a fire or a fault occurs, the fault points of the corresponding energy storage unit and the inverter boost unit can be separately cut off through the monitoring module to ensure the stable operation of the emergency power supply base and improve the power supply efficiency.

[0037] In addition, the utility model has a reliable design principle, a simple structure, and a very wide application prospect. It can be seen that compared with the prior art, the utility model has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a schematic diagram of the safety protection system of the energy storage system of the utility model.

[0040] Figure 2 It is a schematic diagram of the structure of the energy storage system of Example 2 of the present utility model. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] like Figure 1 As shown, the utility model provides an energy storage system safety protection system, including an electrical fire protection module, a relay protection module and a monitoring module;

[0044] The energy storage system includes a battery compartment, an inverter boost compartment, an electrical secondary compartment, a high-voltage transformer compartment and a high-voltage switch station; a plurality of energy storage units are arranged in the battery compartment, a current conversion boost unit is arranged in the inverter boost compartment, a high-voltage transformer compartment is arranged with a high-voltage transformer, and the high-voltage switch station includes a plurality of high-voltage charging and discharging intervals, the energy storage unit is connected to the current conversion boost unit, the current conversion boost unit is connected to the high-voltage transformer, and the high-voltage transformer is connected to a high-voltage charging and discharging interval of the high-voltage switch station;

[0045] The electrical fire protection module includes a fire control unit, which is connected to a number of fire alarm controllers; the fire control unit is arranged in the electrical secondary compartment, and the battery compartment and the inverter booster compartment are both provided with fire alarm controllers;

[0046] The relay protection module includes a plurality of contactors, a plurality of circuit breakers, a plurality of optical differential protection units and a plurality of overcurrent protection units;

[0047] The contactor and the circuit breaker are arranged on the connection lines of each energy storage unit and the current conversion and boosting unit, and are also arranged on the connection line between the current conversion and boosting unit and the high-voltage transformer;

[0048] Optical differential protection units and overcurrent protection units are installed in the high-voltage transformer compartment and high-voltage charging and discharging intervals;

[0049] The monitoring module is connected to the relay protection module and the electrical fire protection module.

[0050] Embodiment 2:

[0051] like Figure 1 As shown, the utility model provides an energy storage system safety protection system, including an electrical fire protection module, a relay protection module and a monitoring module;

[0052] The energy storage system includes a battery compartment, an inverter boost compartment, an electrical secondary compartment, a high-voltage transformer compartment and a high-voltage switch station; a plurality of energy storage units are arranged in the battery compartment, a current conversion boost unit is arranged in the inverter boost compartment, a high-voltage transformer compartment is arranged with a high-voltage transformer, and the high-voltage switch station includes a plurality of high-voltage charging and discharging intervals, the energy storage unit is connected to the current conversion boost unit, the current conversion boost unit is connected to the high-voltage transformer, and the high-voltage transformer is connected to a high-voltage charging and discharging interval of the high-voltage switch station;

[0053] Each energy storage unit includes a battery manager BMS and a number of parallel-connected battery clusters, and each battery cluster includes a number of battery modules connected in series;

[0054] The battery module includes a number of battery cells;

[0055] The battery manager BMS is connected to the battery cells; the battery module is composed of battery cells connected in series or in parallel; the electrical fire protection module includes a fire protection control unit, which is connected to several fire alarm controllers; the fire protection control unit is set in the electrical secondary compartment, and the battery compartment and the inverter booster compartment are equipped with fire alarm controllers;

[0056] The relay protection module includes a plurality of contactors, a plurality of circuit breakers, a plurality of optical differential protection units and a plurality of overcurrent protection units;

[0057] The contactor and the circuit breaker are arranged on the connection lines of each energy storage unit and the current conversion and boosting unit, and are also arranged on the connection line between the current conversion and boosting unit and the high-voltage transformer;

[0058] Optical differential protection units and overcurrent protection units are installed in the high-voltage transformer compartment and high-voltage charging and discharging intervals;

[0059] The monitoring module is connected to the relay protection module and the electrical fire protection module;

[0060] The AC boost unit includes a converter PCS and a transformer controller;

[0061] The transformer controller is connected with an isolation transformer and a step-up / step-down transformer and a metering unit;

[0062] One end of the converter PCS is connected to the energy storage unit, the other end of the converter PCS is connected to the primary side of the isolation transformer, the secondary side of the isolation transformer is connected to the primary side of the step-up / step-down transformer, and the secondary side of the step-up / step-down transformer is connected to the primary side of the high-voltage transformer;

[0063] The energy storage unit includes a first power energy storage unit and a second power energy storage unit;

[0064] The converter PCS comprises a first power converter and a second power converter;

[0065] The first power energy storage unit is connected to the first power converter, and the second power energy storage unit is connected to the second power converter;

[0066] One first power converter is connected to one isolation transformer respectively, and two second power converters are connected to one isolation transformer respectively;

[0067] The first power energy storage unit adopts a 0.5 mW energy storage unit, the number of the first power energy storage units is 18, and the number of the first power converters is 18;

[0068] The second power energy storage unit adopts a 0.25mW energy storage unit, the number of the second power energy storage units is 4, and the number of the second power converters is 4;

[0069] The number of isolation transformers is 20, and the number of step-up / step-down transformers is 20;

[0070] For example, Figure 2 As shown, each 0.5mW energy storage unit is equipped with a 500kW converter PCS, a 630kVA isolation transformer, a metering unit, and a 630kVA step-up / step-down transformer, which together form a 0.5mW energy storage converter and step-up unit;

[0071] Each 0.25mW energy storage unit is equipped with a 250kW converter PCS. Every two 250kW converter PCS outgoing lines are connected in parallel to a 630kVA isolation transformer, a metering unit, and a 630kVA step-up / step-down transformer, forming a 0.5MW energy storage converter and step-up unit.

[0072] The secondary side of each step-up / step-down transformer is connected to the first busbar through a contactor, the primary side of the high-voltage transformer is connected to the first busbar, and the secondary side of the high-voltage transformer is connected to the high-voltage switch station;

[0073] For example, 20 energy storage converters are connected to the first busbar after being boosted to 10kV by 630kVA, and then connected to the 35kV high-voltage transformer compartment through two 10kV cable lines, and then connected to the 35kV charging and discharging interval of the high-voltage switch group;

[0074] The first busbar is also connected to a self-use transformer;

[0075] The primary side of the self-use transformer is connected to the first busbar, and the secondary side of the self-use transformer is connected to the in-cabin power distribution box;

[0076] The fire alarm controller is connected with an operating status indicator light, a manual operation button, an audible and visual alarm, and a detector; the detector includes a smoke detector and a heat detector;

[0077] The fire alarm controller is connected to the power distribution box in the cabin; the normal working power supply of the fire alarm controller is AC 220V, which is supplied by the power distribution box in the cabin;

[0078] The high-voltage switch station is equipped with a fault disconnecting device. When a fault occurs in the energy storage side line, the fault disconnecting device can cut off the access line switch to ensure the safe operation of the main power grid.

[0079] Although the utility model is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the utility model, and these modifications or substitutions shall be within the scope of the utility model / any person of ordinary skill in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the utility model, and they shall be within the scope of protection of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope of protection of the claims.

Claims

1. A safety protection system for an energy storage system, characterized in that: Including electrical fire protection module, relay protection module and monitoring module; The energy storage system includes a battery compartment, an inverter boost compartment, an electrical secondary compartment, a high-voltage transformer compartment and a high-voltage switch station; a plurality of energy storage units are arranged in the battery compartment, a current conversion boost unit is arranged in the inverter boost compartment, a high-voltage transformer compartment is arranged with a high-voltage transformer, and the high-voltage switch station includes a plurality of high-voltage charging and discharging intervals, the energy storage unit is connected to the current conversion boost unit, the current conversion boost unit is connected to the high-voltage transformer, and the high-voltage transformer is connected to a high-voltage charging and discharging interval of the high-voltage switch station; The electrical fire protection module includes a fire control unit, which is connected to a number of fire alarm controllers; the fire control unit is arranged in the electrical secondary compartment, and the battery compartment and the inverter booster compartment are both provided with fire alarm controllers; The relay protection module includes a plurality of contactors, a plurality of circuit breakers, a plurality of optical differential protection units and a plurality of overcurrent protection units; The contactor and the circuit breaker are arranged on the connection lines of each energy storage unit and the current conversion and boosting unit, and are also arranged on the connection line between the current conversion and boosting unit and the high-voltage transformer; Optical differential protection units and overcurrent protection units are installed in the high-voltage transformer compartment and high-voltage charging and discharging intervals; The monitoring module is connected to the relay protection module and the electrical fire protection module.

2. The energy storage system safety protection system according to claim 1, characterized in that: The AC boost unit includes a converter PCS and a transformer controller; The transformer controller is connected with an isolation transformer and a step-up / step-down transformer and a metering unit; One end of the converter PCS is connected to the energy storage unit, the other end of the converter PCS is connected to the primary side of the isolation transformer, the secondary side of the isolation transformer is connected to the primary side of the step-up / step-down transformer, and the secondary side of the step-up / step-down transformer is connected to the primary side of the high-voltage transformer.

3. The energy storage system safety protection system according to claim 2, characterized in that: The energy storage unit includes a first power energy storage unit and a second power energy storage unit; The converter PCS comprises a first power converter and a second power converter; The first power energy storage unit is connected to the first power converter, and the second power energy storage unit is connected to the second power converter; One first power converter is connected to one isolation transformer correspondingly, and two second power converters are connected to one isolation transformer correspondingly.

4. The energy storage system safety protection system according to claim 3, characterized in that: The first power energy storage unit adopts a 0.5 mW energy storage unit, the number of the first power energy storage units is 18, and the number of the first power converters is 18; The second power energy storage unit adopts a 0.25mW energy storage unit, the number of the second power energy storage units is 4, and the number of the second power converters is 4; The number of isolation transformers is 20, and the number of step-up / step-down transformers is 20.

5. The energy storage system safety protection system according to claim 3, characterized in that: The secondary side of each step-up / step-down transformer is connected to the first busbar through a contactor, the primary side of the high-voltage transformer is connected to the first busbar, and the secondary side of the high-voltage transformer is connected to the high-voltage switch station.

6. The energy storage system safety protection system according to claim 3, characterized in that: The first busbar is also connected to a self-use transformer; The primary side of the self-use transformer is connected to the first busbar, and the secondary side of the self-use transformer is connected to the in-cabin distribution box.

7. The energy storage system safety protection system according to claim 6, characterized in that: The fire alarm controller is connected with operating status indicator lights, manual operation buttons, sound and light alarms and detectors; The fire alarm controller is connected to the distribution box in the cabin.

8. The energy storage system safety protection system according to claim 7, characterized in that: Detectors include smoke detectors and heat detectors.

9. The energy storage system safety protection system according to claim 1, characterized in that: A fault disconnecting device is installed in the high-voltage switch station.

10. The energy storage system safety protection system according to claim 1, characterized in that: The energy storage unit includes a battery manager BMS and a number of parallel-connected battery clusters, each of which includes a number of battery modules connected in series; The battery module includes a number of battery cells; The battery manager BMS is connected to the battery cells.

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