Energy storage power supply system

Abstract

The utility model discloses an energy storage power supply system, which is characterized in that the energy storage power supply system comprises a power supply, a first relay, a second relay and a controller, the power supply is electrically connected with the first relay and the controller, and the controller is electrically connected with the second relay; wherein the first relay is connected with the opening control coil, and a normally open contact is arranged between the first relay and the opening control coil; the second relay is electrically connected with the contact, and when the second relay is powered on, the contact is controlled to be switched from the normally open state to the normally closed state. The energy storage power supply system can utilize the controller to perform auxiliary control so as to realize power-on and power-off of the opening control coil by controlling power-on and power-off of the second relay, thereby indirectly controlling power-on and power-off of electric connection between an external power transmission network and the power supply, realizing charging control of the power supply, and avoiding power failure caused by power failure of the power supply. And the system is in an on-off circulation state and cannot be normally powered on.

Description

Technical Field

[0001] The present utility model discloses a technology related to energy storage power supply, and particularly relates to an energy storage power supply system. Background Technique

[0002] In recent years, with the rapid development and wide penetration of information technology, data centers and communication computer rooms, as the core infrastructure for supporting the storage, processing, and transmission of massive amounts of data, have also expanded rapidly. Among them, such data centers and communication computer rooms generally use energy storage power supply systems for power supply.

[0003] Currently, the power distribution topology of the existing energy storage power supply system for data center power supply can be referred to Figure 1 . When applying the existing such energy storage power supply system, it can be divided into the following two situations according to the power of the UPS power supply: ① When the UPS power supply is powered on, the energy storage power supply system can directly turn on the UPS power supply so that the power distribution equipment is powered on. ② When the UPS power supply is out of power, the main switch is controlled to turn on to charge the UPS power supply using the external power grid, and only then can the UPS power supply be powered on and the power distribution equipment can supply power normally.

[0004] However, in this design situation, it is not possible to accurately judge the power of the UPS power supply in a timely manner. After using the external power grid to supply power to the UPS power supply, the UPS power supply will be judged as powered on again after limited charging and put into use, and it is very easy for the UPS power supply to run out of power again, causing the system to fall into an on-off cycle state and unable to be powered on normally; once the UPS power supply runs out of power, it needs to be disassembled and charged separately, increasing the maintenance cost. Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to design an energy storage power supply system to solve the problem that the existing traditional energy storage power supply method causes the system to fall into an on-off cycle state and unable to be powered on normally due to the power failure of the power supply of the energy storage power supply system.

[0006] To solve the above technical problem, the technical solution adopted by the present utility model is: an energy storage power supply system, characterized by comprising: a power supply, a first relay, a second relay, and a controller. The power supply is electrically connected to the first relay and the controller, and the controller is electrically connected to the second relay; wherein, the first relay is connected to a trip control coil, and there is a normally open contact between the first relay and the trip control coil; the second relay is electrically connected to the contact, and when the second relay is powered on, it controls the contact to switch from the normally open state to the normally closed state.

[0007] Further, in the energy storage power supply system of the present utility model, the contact is a single-pole single-throw contact.

[0008] Further, in the energy storage power supply system of the present utility model, the power supply is a UPS power supply, and the UPS power supply is electrically connected to an external power grid.

[0009] Further, in the energy storage power supply system of the present utility model, a main power supply switch is provided between the UPS power supply and the external power grid; wherein, when the contact is in the normally open state, the opening control coil is powered, and the opening control coil controls the main power supply switch to be in the open state; when the contact is in the normally closed state, the opening control coil is de-energized, and the main power supply switch is in the closed state.

[0010] Further, in the energy storage power supply system of the present utility model, the UPS power supply outputs low-voltage direct current to the controller and the first relay.

[0011] Further, in the energy storage power supply system of the present utility model, the low-voltage direct current is 24V direct current.

[0012] Further, in the energy storage power supply system of the present utility model, the controller is powered on and identifies the current power of the UPS power supply, and determines whether to supply power to the second relay based on the current power of the UPS power supply.

[0013] Further, in the energy storage power supply system of the present utility model, determining whether to supply power to the second relay based on the current power of the UPS power supply specifically includes:

[0014] Obtaining the ratio of the current power of the UPS power supply to the total preset power of the UPS power supply; when the ratio > 10%, the controller controls the second relay to be powered on.

[0015] Further, in the energy storage power supply system of the present utility model, the first relay is sequentially connected in series with an emergency stop normally closed dry contact, a lightning protection normally closed dry contact, a fire protection normally closed dry contact, and a water immersion normally closed dry contact.

[0016] Further, in the energy storage power supply system of the present utility model, it further includes a PCS emergency stop control coil, and the first relay is electrically connected to the PCS emergency stop control coil.

[0017] The beneficial effects of the present utility model are as follows: The inventor has optimized and designed an energy storage power supply system, which can effectively control the charging / energization of the power supply in the energy storage power supply system by newly designing the power structure of its own energy storage power supply system, and avoid the problem that the energy storage power supply system cannot be normally energized due to the power failure of the power supply and getting into an on-off cycle state.

[0018] In actual application, the energy storage power supply system can use a controller for auxiliary control, so that when an abnormal condition is detected, the on-off of the second relay is controlled to realize the on-off of the shunt control coil, thereby indirectly controlling the on-off of the connection between the external power grid and the above-mentioned power supply to charge the above-mentioned power supply; at the same time, since the controller can obtain the power information of the power supply in real time, when the power supply is charging, it can judge whether the power information of the power supply meets the preset conditions according to the power information of the power supply. If it is judged that the preset conditions are met, the power supply can be powered on normally, avoiding the system from falling into an on-off cycle state.

[0019] It can be seen that the energy storage power supply system designed by the present invention can realize the normal power-on and power supply of the power supply. On the basis of ensuring low cost, it improves the reliability of the energy storage power supply system and improves the application effect of the energy storage power supply system. It has good promotion prospects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the power distribution topology diagram of the energy storage power supply system.

[0021] Figure 2 It is the circuit architecture diagram of the energy storage power supply system of the present invention under one embodiment.

[0022] Figure 3 It is the control block diagram of the energy storage power supply system of the present invention under one embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To describe the technical content, achieved objectives and effects of the present invention in detail, the following is described in conjunction with the embodiments and with reference to the drawings.

[0024] Refer to Figure 1 As shown, in the energy storage power supply system designed by the present invention, it also adopts the Figure 1 shown power distribution topology structure. The power supply of the energy storage power supply system is specifically a UPS power supply (uninterruptible power supply), and the UPS power supply is electrically connected to the external power grid; among them, a main power switch is provided between the UPS power supply and the external power grid to control the charging process of the external power grid to the UPS power supply in the energy storage power supply system by controlling the opening or closing of the above-mentioned main power switch.

[0025] Correspondingly, further referring to Figure 2 and Figure 3 it can be seen that in this embodiment, in addition to setting the above-mentioned UPS power supply, the energy storage power supply system also adopts a controller provided with an EMS (Energy Management System) program. At the same time, the energy storage power supply system is also provided with a first relay and a second relay.

[0026] As Figure 2 shown, in this embodiment, the above UPS power supply is electrically connected to the first relay and the controller respectively, and the controller is electrically connected to the second relay; wherein, the first relay is connected with a shunt control coil, and there is a normally open contact between the first relay and the shunt control coil, and this contact is specifically selected as a single-pole single-throw contact.

[0027] When setting the second relay, control the second relay to be electrically connected to the above contact, and realize its own power-on or power-off under the control of the controller. When the second relay is powered on, the second relay can control the above contact to switch from the normally open state to the normally closed state.

[0028] It should be noted that when the above contact is in the normally open state, the above shunt control coil is powered by the first relay, and the shunt control coil can control the above main power switch to be in the off state. At this time, the external power grid does not charge the UPS power supply; of course, when the above contact switches from the normally open state to the normally closed state under the control of the second relay, the shunt control coil will be powered off, and at this time the main power switch is in the on state, and the above external power grid can charge the UPS power supply.

[0029] As Figure 3 shown, in this embodiment, the above UPS power supply can output 24V low-voltage direct current to the above controller and the first relay, so that the above controller is powered on and recognizes the current power of the UPS power supply, and judges whether to supply power to the second relay based on the current power of the UPS power supply. Among them, when the ratio of the current power of the UPS power supply to the preset total power of the UPS power supply > 10%, the above controller controls the second relay to be powered on, so as to use the second relay to control the contact between the first relay and the shunt control coil to switch from the normally open state to the normally closed state.

[0030] Correspondingly, referring to Figure 2 shown, a hard control protection circuit is designed in the energy storage power supply system, which connects the emergency stop normally closed dry contact, the lightning protection normally closed dry contact, the fire protection normally closed dry contact and the water immersion normally closed dry contact in series to the first relay KA1 in turn. It adopts the series connection method of normally closed dry contacts, which can ensure that the system can detect the wiring looseness and increase the reliability.

[0031] At the same time, as Figure 2 shown, it also connects the loop to be jointly protected to the contact loop of the first relay KA1, which includes the main switch shunt loop (that is, the loop including the shunt control coil), the power supply, the PCS normally closed emergency stop signal, etc. Among them, if any fault is triggered, the dry contact state of the triggering device changes from the normally closed state to the normally open state, and the main switch shunt loop is interrupted → the shunt control coil loses power → the contact state between the first relay and the shunt control coil changes.

[0032] When actually applying this energy storage power supply system, the contact on the opening circuit of the main switch is also connected to the second relay, and the controller can control the second relay by controlling the action of DO1 to adjust the dry contact state of the contact, thereby controlling the power supply / power loss of the above-mentioned opening control coil, and thus controlling the main power switch. Among them, when the operator checks that there is no abnormality on site, the UPS power supply of the above-mentioned energy storage power supply system can be normally powered on. At this time, the first relay and the controller are powered on. The contact on the opening circuit of the main switch connected to the first relay is in the normally open state and will not control the opening of the main power switch. At this time, the controller is powered on, and the EMS program in it starts automatically when the power is on, recognizes that the system power-on is completed, the device status is normal, and controls the action of DO1 to make the coil of the second relay (KA2) powered on, thereby controlling the contact on the normally open main switch opening circuit to turn into a normally closed contact, ensuring that the system opening protection function is normally enabled.

[0033] In this embodiment, using the above-mentioned controller for control is beneficial to troubleshooting. Among them, the EMS program in the controller can start automatically to identify abnormal system status and report faults. For example, in some actual application cases, it can obtain the current power of the UPS power supply, and when the ratio of the current power of the UPS power supply to the preset total power of the UPS power supply > 10%, then make the coil of the second relay (KA2) powered on, thereby controlling the contact on the normally open main switch opening circuit to turn into a normally closed contact, closing the main switch opening circuit, so that personnel can troubleshoot the cause of abnormal faults on site.

[0034] That is to say, as Figure 3 shown, the power-on process of this energy storage power supply system is as follows: after the UPS power supply is powered on, the EMS program of the controller identifies the current power of the UPS power supply, and can control the closing of the main switch opening circuit only when the conditions are met. If the UPS power does not meet the conditions, continue to charge until it meets the requirements, and then the controller controls the closing of the main switch opening circuit based on the second relay, avoiding excessive fault analysis time caused by abnormal faults such as poor wiring and device damage, short backup power time when the power is too low, and power distribution power loss.

[0035] In summary, the energy storage power supply system designed by the present utility model can use the controller for auxiliary control, so that when an abnormal condition is detected, by controlling the on-off of the second relay, the on-off of the opening control coil can be realized, thereby indirectly controlling the on-off of the connection between the external power grid and the above-mentioned power supply, and charging the above-mentioned power supply; at the same time, since the controller can obtain the power information of the power supply in real time, when the power supply is charging, it can judge whether the power information of the power supply meets the preset conditions according to the power information of the power supply. If it is judged that the preset conditions are met, it can be normally powered on, avoiding the system from falling into an on-off cycle state.

[0036] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A energy storage power supply system, characterized in that, Including: A power supply, a first relay, a second relay, and a controller. The power supply is electrically connected to the first relay and the controller, and the controller is electrically connected to the second relay. Among them, the first relay is connected to a trip control coil, and a normally open contact is provided between the first relay and the trip control coil. The second relay is electrically connected to the contact, and when the second relay is powered on, it controls the contact to switch from the normally open state to the normally closed state.

2. The energy storage power supply system according to claim 1, wherein The contact is a single-pole single-throw contact.

3. The energy storage power supply system according to claim 1, wherein, The power supply is a UPS power supply, and the UPS power supply is electrically connected to an external power grid.

4. The energy storage power supply system according to claim 3, wherein, A main power switch is provided between the UPS power supply and the external power grid. Among them, when the contact is in the normally open state, the trip control coil is powered, and the trip control coil controls the main power switch to be in the open state. When the contact is in the normally closed state, the trip control coil is powered off, and the main power switch is in the closed state.

5. The energy storage power supply system according to claim 4, characterized in that The UPS power supply outputs low-voltage direct current to the controller and the first relay.

6. The energy storage power supply system according to claim 5, characterized in that, The low-voltage direct current is 24V direct current.

7. The energy storage power supply system according to claim 5, wherein, The controller is powered on and identifies the current power of the UPS power supply, and determines whether to supply power to the second relay based on the current power of the UPS power supply.

8. The energy storage power supply system according to claim 7, wherein The determination of whether to supply power to the second relay based on the current power of the UPS power supply is specifically: Obtain the ratio of the current power of the UPS power supply to the preset total power of the UPS power supply. When the ratio > 10%, the controller controls to power on the second relay.

9. The energy storage power supply system according to claim 1, wherein The first relay is sequentially connected in series with an emergency stop normally closed dry contact, a lightning protection normally closed dry contact, a fire protection normally closed dry contact, and a water immersion normally closed dry contact.

10. The energy storage power supply system according to claim 1, characterized in that, It further includes a PCS emergency stop control coil, and the first relay is electrically connected to the PCS emergency stop control coil.

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