CN-122026594-A - Energy storage standby power type power supply and distribution system

CN122026594ACN 122026594 ACN122026594 ACN 122026594ACN-122026594-A

Abstract

The application relates to an energy storage standby power supply and distribution system which comprises a two-way output voltage source module, a first circuit breaker, an STS switching module, an energy storage converter and an energy storage battery. One end of the two-way output voltage source module is electrically connected with one end of the first circuit breaker and a first input end of the STS switching module, the other end of the two-way output voltage source module is electrically connected with the other end of the first circuit breaker and a second input end of the STS switching module, the output of the STS switching module is electrically connected with two paths of loads, one end of the energy storage converter is electrically connected with the STS switching module, and the other end of the energy storage converter is electrically connected with the energy storage battery. The energy storage standby power type power supply and distribution system provided by the application can realize uninterrupted power supply of key power utilization loads.

Inventors

WANG CHEN
ZHANG RIXI
GENG YUHUI
WANG ZIBO
CHEN JIAQI
LIU MING

Assignees

天津恩特能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (10)

1. The energy storage standby power supply and distribution system is characterized by comprising a two-way output voltage source module, a first circuit breaker, an STS switching module, an energy storage converter and an energy storage battery; One end of the two-way output voltage source module is electrically connected with one end of the first circuit breaker and a first input end of the STS switching module, the other end of the two-way output voltage source module is electrically connected with the other end of the first circuit breaker and a second input end of the STS switching module, the output of the STS switching module is electrically connected with two loads, one end of the energy storage converter is electrically connected with the STS switching module, and the other end of the energy storage converter is electrically connected with the energy storage battery.
2. The energy storage backup power supply and distribution system of claim 1 wherein the STS switch module comprises a first static transfer switch, a second static transfer switch, a third static transfer switch, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, a seventh circuit breaker, an eighth circuit breaker, and a ninth circuit breaker.
3. The energy storage backup power supply and distribution system according to claim 2, wherein one end of the first static transfer switch is connected in series with the fourth circuit breaker to form a first input end of the STS switching module, and one end of the third static transfer switch is connected in series with the sixth circuit breaker to form a second input end of the STS switching module.
4. The energy storage standby power supply and distribution system according to claim 3, wherein the other end of the first static transfer switch is electrically connected to one end of the fifth circuit breaker and one end of the second static transfer switch STS2, and the other end of the fifth circuit breaker is electrically connected to one load; the other end of the second static change-over switch is electrically connected to one end of the eighth circuit breaker, the other end of the fourth static change-over switch is electrically connected to one end of the ninth circuit breaker, and the other end of the eighth circuit breaker is electrically connected to the energy storage converter after being connected in parallel with the other end of the ninth circuit breaker.
5. The energy storage backup power supply and distribution system of claim 4 further comprising a tenth circuit breaker and an eleventh circuit breaker; One end of the tenth circuit breaker is electrically connected with the other end of the second circuit breaker, one end of the first circuit breaker and the fourth circuit breaker, the other end of the tenth circuit breaker is electrically connected with the other end of the fifth circuit breaker and one path of load, one end of the eleventh circuit breaker is electrically connected with the other end of the third circuit breaker, the other end of the first circuit breaker and the sixth circuit breaker, and the other end of the eleventh circuit breaker is electrically connected with the other end of the seventh circuit breaker and the other path of load.
6. The energy storage standby power supply and distribution system according to claim 1, wherein when the two-way output voltage source module works normally and the energy storage battery has sufficient electric quantity, the energy storage converter is in an off-grid mode, and an energy storage system formed by the energy storage converter and the energy storage battery is in an energy storage standby state.
7. The energy storage standby power supply and distribution system according to claim 1, wherein when the two-way output voltage source module cannot provide stable power supply, the energy storage system formed by the energy storage converter and the energy storage battery is in an emergency power supply state of power grid faults, and the energy storage converter takes power from the energy storage battery to invert in an off-grid mode to supply power to a load.
8. The energy storage standby power supply and distribution system according to claim 7 is characterized in that when a single-path fault occurs in the two-path output voltage source module, the steps of (1) opening a static transfer switch for supplying power to a load by the two-path output voltage source module on a fault line, wherein the energy storage converter is in an off-grid mode, the energy storage system supplies power to the load on the fault line, and (2) closing a first circuit breaker, supplying power to two loads by a normal line, and stopping supplying power to the load on the fault line by the energy storage system are sequentially performed.
9. The energy storage backup power supply and distribution system according to claim 7, wherein when the two-way output voltage source module has a two-way fault, the static transfer switches on the fault line for supplying power to the load by the two-way output voltage source module are all opened, the energy storage converter is in off-grid mode, and the energy storage system supplies power to the loads on the two fault lines.
10. The energy storage backup power supply and distribution system according to claim 1, wherein when the two-way output voltage source module is restored to normal and the electric quantity of the energy storage battery is low, the energy storage system formed by the energy storage converter and the energy storage battery is in an energy storage charging state, and the energy storage converter is in a grid-connected mode.

Description

Energy storage standby power type power supply and distribution system Technical Field The application relates to the technical field of power electronics, in particular to an energy storage standby power type power supply and distribution system. Background With the rapid development of digital economies, critical electrical loads (e.g., data centers, hospitals, etc.) are becoming an important component of new infrastructure, placing extremely high demands on the reliability and continuity of electrical energy. The traditional UPS power supply framework comprises a mains supply input, a transformer, a UPS, a diesel generator and the like, and has the problem of low AC-DC-AC twice conversion efficiency. In recent years, the combination of an energy storage converter (Power Converter System, PCS) and a battery energy storage system is gradually becoming a new direction for a key electric load backup system. The energy storage converter is characterized by having bidirectional energy flow capacity of rectification (AC/DC) and inversion (DC/AC), and being capable of switching the working modes according to the current requirements of the system. Disclosure of Invention Based on the above, it is necessary to provide an energy storage standby power supply and distribution system, which can realize uninterrupted power supply of key power utilization loads. The application provides an energy storage standby power type power supply and distribution system which comprises a two-way output voltage source module, a first circuit breaker, an STS switching module, an energy storage converter and an energy storage battery. One end of the two-way output voltage source module is electrically connected with one end of the first circuit breaker and a first input end of the STS switching module, the other end of the two-way output voltage source module is electrically connected with the other end of the first circuit breaker and a second input end of the STS switching module, the output of the STS switching module is electrically connected with two loads, one end of the energy storage converter is electrically connected with the STS switching module, and the other end of the energy storage converter is electrically connected with the energy storage battery. Preferably, the STS switching module comprises a first static change-over switch, a second static change-over switch, a third static change-over switch, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, a seventh circuit breaker, an eighth circuit breaker and a ninth circuit breaker. Preferably, one end of the first static transfer switch is connected in series with the fourth circuit breaker to form a first input end of the STS switching module, and one end of the third static transfer switch is connected in series with the sixth circuit breaker to form a second input end of the STS switching module. Preferably, the other end of the first static transfer switch is electrically connected to one end of the fifth circuit breaker and one end of the second static transfer switch STS2, the other end of the fifth circuit breaker is electrically connected to one path of load, the other end of the third static transfer switch is electrically connected to one end of the seventh circuit breaker and one end of the fourth static transfer switch, the other end of the seventh circuit breaker is electrically connected to the other path of load, the other end of the second static transfer switch is electrically connected to one end of the eighth circuit breaker, the other end of the fourth static transfer switch is electrically connected to one end of the ninth circuit breaker, and the other end of the eighth circuit breaker and the other end of the ninth circuit breaker are electrically connected to the energy storage converter after being connected in parallel. The energy storage standby power supply and distribution system further comprises a tenth circuit breaker and an eleventh circuit breaker, wherein one end of the tenth circuit breaker is electrically connected with the other end of the second circuit breaker, one end of the first circuit breaker and the fourth circuit breaker, the other end of the tenth circuit breaker is electrically connected with the other end of the fifth circuit breaker and one path of load, one end of the eleventh circuit breaker is electrically connected with the other end of the third circuit breaker, the other end of the first circuit breaker and the sixth circuit breaker, and the other end of the eleventh circuit breaker is electrically connected with the other end of the seventh circuit breaker and the other path of load. Preferably, when the two-way output voltage source module works normally and the electric quantity of the energy storage battery is sufficient, the energy storage converter is in an off-grid mode, and an energy storage system formed by the energy storage converter and the energy storage battery is in an energ