High-reliability super-capacitor power grid current stabilization system

Abstract

A high-reliability super capacitor power grid current stabilization system comprises an AC bus and an SCR, the SCR is composed of a medium-voltage transformer, a bidirectional converter, a bidirectional DC-DC, a super capacitor, a signal acquisition module and a signal processing module, the super capacitor is connected with the AC bus through the bidirectional DC-DC, the bidirectional converter and the medium-voltage transformer in sequence, the signal acquisition module is connected with the AC bus, and the signal processing module is connected with the AC bus. And the signal processing module is connected with the bidirectional converter image. According to the power grid current stabilization system, power oscillation of the computing power data center is suppressed more safely and reliably through multi-group optimization design, and safe and stable operation of a power system is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of data centers, and more specifically relates to a cabinet system for high heat flux density cooling and an operation method thereof. Background Art

[0002] As a new productivity, computing power has been widely integrated into all aspects of social production and life, and has become an important development direction for my country to promote digital transformation. The Outline of the 2035 Vision Goals clearly states that we must "accelerate the construction of a national integrated big data center system, strengthen the coordination and dispatch of computing power, build a number of national hub nodes and big data center clusters, and build E-level and 10E-level supercomputing centers."

[0003] With the rapid development of computing power infrastructure, the high energy consumption of computing power data centers has increased, and some problems with power operation safety have also emerged. For example, the real-time power of computing power data centers will experience periodic cliff-like power reduction. In a computing power data center, within a power oscillation cycle of about 36 seconds, the total power will experience two instantaneous cliff-like reductions. The low power state lasts for about 4 seconds, and then the power of the computing power data center recovers linearly, with the maximum power drop reaching about 80%. This periodic power oscillation has a huge impact on the safe operation of the power grid.

[0004] This cliff-like power reduction phenomenon lasts for a short time. For energy storage systems such as lithium batteries and lead-acid batteries to suppress the power changes of the power grid bus, lithium batteries, lead-acid batteries and other batteries are chemical power sources. Although they have the characteristics of high energy density, their power density is low. In addition, for high-power energy storage systems, they have large capacity, slow charging and discharging speed, few charging and discharging times and short life, which makes it difficult to meet the short-cycle fluctuation suppression of the power grid. Supercapacitors are physical power sources, with the advantages of good energy storage timeliness, high power density, fast charging speed, long cycle life, safety and reliability, and green environmental protection. They have ultra-fast high-frequency charging and discharging capabilities, a lifespan of up to 1.5 million times / 10 years, and a wide temperature adaptation range of -40 to +65℃. However, the frequent charging and discharging conversion of a single supercapacitor system in this short-cycle fluctuation is also prone to cause the loss of electronic devices such as capacitors and inductors in the system, thereby affecting the life of the entire system. Therefore, in response to the short-cycle power oscillation phenomenon of computing power data centers, designing and developing a fast, ultra-long-life, safe and reliable supercapacitor power grid current stabilization system is an important technical approach to solve the safety of the power grid. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art, and adopt multiple groups of SCR systems, which are grouped to operate alternately in two operating modes: storing electric energy and releasing electric energy, to achieve continuous storage of electric energy in multiple cycles, and continuous release of electric energy in multiple cycles, and reduce the conversion frequency of SCR storage and release of electric energy, thereby effectively extending the life of the system and ensuring the safe operation of the computing power data center power grid.

[0006] The technical solution of the present invention is as follows:

[0007] A high-reliability supercapacitor grid current stabilization system, characterized in that it includes: an AC bus and an SCR, wherein the SCR is composed of 2N units, where N is greater than or equal to 1; the SCR is composed of a medium-voltage transformer, a bidirectional converter, a bidirectional DC-DC, a supercapacitor, a signal acquisition module, and a signal processing module; the supercapacitor is connected to the AC bus in sequence through the bidirectional DC-DC, the bidirectional converter, and the medium-voltage transformer; the signal acquisition module is connected to the AC bus and is connected to the bidirectional converter through the signal processing module; the supercapacitor is used to absorb and release electric energy and is used to adjust the power fluctuation of the AC bus caused by the change of IT load, and its capacity is greater than or equal to the electric energy change of one fluctuation cycle of the AC bus; the medium-voltage transformer is used to adjust the voltage matching between the bidirectional converter and the AC bus; the bidirectional converter is used for the medium-voltage transformer The bidirectional DC-DC is used for power conversion between the bidirectional converter and the supercapacitor; the bidirectional DC-DC is used for DC voltage matching between the bidirectional converter and the supercapacitor; the signal acquisition module is used for collecting and monitoring the power state of the AC bus; the signal processing module is used for processing changes in the power parameters of the AC bus; the SCR is evenly divided into two groups, SCR1 and SCR2, and has two operating modes: storing power and releasing power; within a period of greater than or equal to one AC bus fluctuation cycle, when the real-time power of the AC bus is less than or equal to the charging set power, SCR1 stores the excess power within the cycle, and when the real-time power of the AC bus is greater than or equal to the charging set power, SCR2 releases power to the AC bus; after SCR1 completes storing power and SCR2 completes releasing power, SCR1 switches to the power release mode, and SCR2 switches to the power storage mode at the same time.

[0008] In the above technical solution, the supercapacitor is composed of a plurality of supercapacitor monomers connected in series and parallel, which can be a single supercapacitor group, a combination of multiple supercapacitor groups, or a combination of a supercapacitor group and a battery group.

[0009] Preferably, the SCR can be directly connected to the low-voltage AC bus without the need for a medium-voltage transformer, and can directly adjust the power change of the power grid on the low-voltage side.

[0010] Preferably, the supercapacitor can be directly connected to the bidirectional converter, and directly matches the DC side voltage range of the bidirectional converter in a series-parallel manner.

[0011] Preferably, the supercapacitor can be directly connected to the bidirectional converter, and directly matches the DC side voltage range of the bidirectional converter in a series-parallel manner.

[0012] Preferably, the charge-discharge conversion time of the SCR does not exceed 100 ms.

[0013] Compared with the prior art, the present invention has the following advantages and outstanding technical effects: the present invention closely meets the needs of safe operation of the computing power data center power grid, fully utilizes the advantages of supercapacitors' ultra-fast high-frequency charging and discharging, wide temperature adaptability range, ultra-long life, high safety, high reliability, and linear charging and discharging, and optimizes the design of multiple groups of safer and more reliable power grid current stabilization systems that suppress power oscillations in the computing power data center, thereby achieving the effect of stabilizing the power of the computing power data center power grid and realizing safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention provides a high reliability super capacitor grid current stabilization system embodiment principle and structural schematic diagram.

[0015] 1—AC bus; 2—SCR1; 21—Medium voltage transformer 1; 22—Bidirectional converter 1; 23—Bidirectional DC-DC 1; 24—Super capacitor 1; 25—Signal acquisition module 1; 26—Signal processing module 1; 3—SCR2; 31—Medium voltage transformer 2; 32—Bidirectional converter 2; 33—Bidirectional DC-DC 2; 34—Super capacitor 2; 35—Signal acquisition module 2; 36—Signal processing module 2; 4—Medium voltage distribution system; 5—Low voltage distribution system; 6—IT load. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0017] Figure 1The schematic diagram of the principle and structure of a high-reliability supercapacitor grid current stabilization system includes an AC bus and SCR, wherein the SCR is composed of 2N units, where N is greater than or equal to 1; the SCR is composed of a medium-voltage transformer, a bidirectional converter, a bidirectional DC-DC, a supercapacitor, a signal acquisition module, and a signal processing module; the supercapacitor is connected to the AC bus in sequence through the bidirectional DC-DC, the bidirectional converter, and the medium-voltage transformer; the signal acquisition module is connected to the AC bus, and is connected to the bidirectional converter through the signal processing module; the supercapacitor is used to absorb and release electric energy, and is used to adjust the power fluctuation of the AC bus caused by the change of IT load, and its capacity is greater than or equal to the electric energy change of one fluctuation cycle of the AC bus; the medium-voltage transformer is used to adjust the voltage matching between the bidirectional converter and the AC bus; the bidirectional converter is used for medium The invention relates to a power conversion device for power conversion between a voltage transformer and a super capacitor; the bidirectional DC-DC is used for DC voltage matching between a bidirectional converter and a super capacitor; the signal acquisition module is used for collecting and monitoring the power state of the AC bus; the signal processing module is used for processing changes in the power parameters of the AC bus; the SCR is evenly divided into two groups, SCR1 and SCR2, and has two operating modes of storing power and releasing power; within a period of greater than or equal to one AC bus fluctuation cycle, when the real-time power of the AC bus is less than or equal to the charging set power, SCR1 stores the excess power within the cycle, and when the real-time power of the AC bus is greater than or equal to the charging set power, SCR2 releases power to the AC bus; after SCR1 completes storing power and SCR2 completes releasing power, SCR1 switches to the power release mode, and SCR2 switches to the power storage mode at the same time.

[0018] The supercapacitor is composed of several supercapacitor monomers connected in series and parallel, which can be a single supercapacitor group, a combination of multiple supercapacitor groups, or a combination of a supercapacitor group and a battery group. The SCR can omit the medium-voltage transformer and directly connect to the low-voltage AC bus, and directly adjust the power change of the power grid on the low-voltage side. The supercapacitor can be directly connected to the bidirectional converter, and directly match the DC side voltage range of the bidirectional converter through the series-parallel type. The supercapacitor can be directly connected to the bidirectional converter, and directly match the DC side voltage range of the bidirectional converter through the series-parallel type. The charge and discharge conversion time of the SCR does not exceed 100ms.

Claims

1. A high reliability supercapacitor grid current stabilization system, characterized in that: include: AC busbar and SCR, SCR consists of 2N units, N is greater than or equal to 1; The SCR is composed of a medium voltage transformer, a bidirectional converter, a bidirectional DC-DC, a super capacitor, a signal acquisition module, and a signal processing module; the super capacitor is connected to the AC bus in sequence through the bidirectional DC-DC, the bidirectional converter, and the medium voltage transformer; the signal acquisition module is connected to the AC bus and is connected to the bidirectional converter through the signal processing module; the super capacitor is used to absorb and release electric energy and is used to adjust the AC bus power fluctuation caused by IT load changes, and its capacity is greater than or equal to the electric energy change in one fluctuation cycle of the AC bus; the medium voltage transformer is used to adjust the voltage matching between the bidirectional converter and the AC bus; the bidirectional converter is used for power conversion between the medium voltage transformer and the super capacitor; the bidirectional DC-DC is used The DC voltage between the bidirectional converter and the supercapacitor is matched; the signal acquisition module is used for collecting and monitoring the power state of the AC bus; the signal processing module is used for processing the changes in the power parameters of the AC bus; the SCR is evenly divided into two groups, SCR1 and SCR2, and has two operating modes of storing power and releasing power; within a period of greater than or equal to one AC bus fluctuation cycle, when the real-time power of the AC bus is less than or equal to the charging set power, SCR1 stores the excess power within the cycle, and when the real-time power of the AC bus is greater than or equal to the charging set power, SCR2 releases power to the AC bus; after SCR1 completes storing power and SCR2 completes releasing power, SCR1 switches to the power release mode, and SCR2 switches to the power storage mode at the same time.

2. A high reliability supercapacitor grid current stabilization system according to claim 1, characterized in that: The supercapacitor is composed of a plurality of supercapacitor monomers connected in series and in parallel, and can be a single supercapacitor group, a combination of multiple supercapacitor groups, or a combination of a supercapacitor group and a battery group.

3. A high reliability supercapacitor grid current stabilization system according to claim 1, characterized in that: The SCR can be directly connected to the low-voltage AC bus without the need for a medium-voltage transformer, and can directly adjust the power change of the power grid on the low-voltage side.

4. A high reliability supercapacitor grid current stabilization system according to claim 1, characterized in that: The supercapacitor can be directly connected to the bidirectional converter and directly matches the DC side voltage range of the bidirectional converter in a series-parallel mode.

5. A high reliability supercapacitor grid current stabilization system according to claim 1, characterized in that: The discharge setting power of the signal processing module is equal to the charge setting power, and the discharge setting power may also be greater than the charge setting power.

6. A high reliability supercapacitor grid current stabilization system according to claim 1, characterized in that: The charge and discharge conversion time of the SCR does not exceed 100ms.

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