直流型电压扰动治理装置DC bank

产品概述 Product description

DC BANK是一种主要用于变频器负载的暂态及稳态电能质量治理设备，同时兼具电流谐波抑制

以及无功补偿功能为一体的综合型电力电子装置。DC BANK采用并联方式安装于系统和用户设备之间，在系统电压正常时，DC BANK能够动态抑制负荷支路产生的电流谐波，减少谐波电流带来的危害，同时可以矫正负荷支路功率因数；在电网电压跌落时，DC BANK能够迅速为负荷支路提供动态有功支撑，确保后级用电负荷能够穿越低电压，保持正常工作；在电网电压恢复后DC BANK重新进入电压跌落补偿待机和谐波治理无功补偿状态。DC BANK在电能质量治理方面可以实现全面治理。

The DC BANK is a comprehensive power electronic device primarily designed for transient and steady-state power quality management in variable frequency drive (VFD) loads. It integrates current harmonic suppression and reactive power compensation functions.   Installed in parallel between the system and user equipment, the DC BANK dynamically suppresses current harmonics generated by load branches under normal system voltage conditions, mitigating the hazards caused by harmonic currents while correcting the power factor of load branches. In the event of a grid voltage dip, the DC BANK rapidly provides dynamic active power support to ensure downstream loads can sustain operation during voltage sags. Upon grid voltage recovery, the DC BANK reverts to standby mode for voltage dip compensation and harmonic management with reactive power compensation.   The DC BANK achieves comprehensive power quality management capabilities.

功能特点 Function features

抗晃电：治理支路电压暂降，确保负荷正常工作。

抑谐波：就地抑制负荷谐波，有源补偿效果完美。

节成本：剔除变频器无源滤波器配置。

保设备：负荷造成VVVF直流过压时能将能量返送至电网，避免VVVF过压坏。

高可靠：DC BANK装置并联于系统中，自身出现故障时能及时退出，不影响系统原有工作状态，安全性高。

Anti shaking electricity: Control the temporary drop of branch voltage to ensure the normal operation of the load.

Harmonic suppression: on-site suppression of load harmonics, with perfect active compensation effect.

Cost saving: Eliminate the configuration of passive filters for frequency converters.

Protection equipment: When the load causes VVVF DC overvoltage, it can return energy to the grid to avoid VVVF overvoltage damage.

High reliability: The DC BANK device is connected in parallel to the system, and can be promptly shut down in case of its own failure, without affecting the original working state of the system, with high safety.

详细参数 Teachnical data

直流能量管理装置 DCPM

产品概述 Product description

DCPM是一种主要用于油田抽油机变频调速系统能量回馈重复利用，同时具有保护变频器免受直流过压损坏的综合型电力电子装置。油田目前普遍使用变频调速装置对抽油机进行控制，有效的改善了抽油机的工作状态，节约了电能。变频调速抽油机系统，主要包括变频器、电动机和抽油机等部分，变频器主要由整流和逆变两部分组成。

抽油设备通常处于电网末端，输电线路远，线路末端电压普遍偏低。当游梁式抽油机工作在上冲程时，启动过程又需要较大电流，会进一步拉低供电线路电压，造成电机过流或发热；当游梁式抽油机处于下冲程时，制动过程处于再生发电状态，产生大量的再生能量，若降再生能量直接回馈电网需要配置四象限变频调速装置，增加了变频调速装置成本，当能量反送时，会造成供电线路电压的波动，影响其他设备正常运行，若采用制动电阻或单元消耗掉再生能量，不仅影响系统效率，而且产生的热量会増加装置散热负担，增加了碳排放。

鉴于此，提出一种能量回馈管理方案，既能收集抽油机下降过程中产生的电能，减少变频器直流过压保护导致停机的风险，又能在抽油机上升过程中提供辅助供电，减少从电网取电的支付成本，同时在整个过程中对交流电网零注入谐波，集节能减排、变频器直流高低压穿越功能于一体。

DCPM is a comprehensive power electronic device mainly used for energy feedback and reuse in the frequency conversion speed control system of oilfield pumping units, while also protecting the frequency converter from DC overvoltage damage. Currently, variable frequency speed control devices are commonly used in oil fields to control pumping units, effectively improving their working conditions and saving electricity. The variable frequency speed control pumping unit system mainly includes a frequency converter, an electric motor, and a pumping unit. The frequency converter is mainly composed of two parts: rectifier and inverter.

Oil pumping equipment is usually located at the end of the power grid, with long transmission lines and generally low voltage at the end of the lines. When the beam pumping unit operates on the upper stroke, alarge current is required during the startup process, which further lowers the voltage of the power supply line, causing motor overcurrent or heating; When the beam pumping unit is in the downstroke, the braking process is in a regenerative power generation state, generating a large amount of regenerative energy. If the regenerative energy is directly fed back to the power grid, a four quadrant variable frequency speed regulation device needs to be configured, which increases the cost of the variable frequency speed regulation device. When the energy is reversed, it will cause voltage fluctuations in the power supply line, affecting the normal operation of other equipment. If braking resistors or units are used to consume regenerative energy, it will not only affect system efficiency, but also increase the heat dissipation burden of the device and increase carbon emissions.

In view of this, an energy feedback management scheme is proposed, which can not only collect the electrical energy generated during the descent of the pumping unit, reduce the risk of shutdown caused by DC overvoltage protection of the frequency converter, but also provide auxiliary power supply during the ascent of the pumping unit, reduce the payment cost of electricity from the power grid, and inject zero harmonics into the AC power grid throughout the entire process, integrating energy-saving and emission reduction, and DC high and low voltage crossing functions of the frequency converter.

功能特点 Function features

节点能：抽油机下冲程时收集机械能转化的电能，消除制动热量，降低碳排放。抽油机上冲程时提供辅助电能，降低对电网能量需求，节约用电成本。

抗晃电：实现变频器直流高电压穿越，变频器制动时，吸收能量降低直流过压风险，确保电机正常工作。实现变频器直流低电压穿越，电网电压暂降时，提供有功支撑，降低变频器直流欠压停机造成的电机停运风险。

零污染：DCPM自身对交流电网系统不产生谐波，对电网零污染，绿色环保。

免维护：超级电容免维护，寿命长，减少维护工作，降低用户应用总成本。

Node energy: Collect electrical energy converted from mechanical energy during the downstroke of the pumping unit, eliminate braking heat, and reduce carbon emissions. Provide auxiliary electrical energy during the upstroke of the pumping unit, reduce the energy demand on the power grid, and save electricity costs.

Anti vibration: Realize the DC high voltage ride through of the frequency converter, absorb energy during the braking of the frequency converter to reduce the risk of DC overvoltage, and ensure the normal operation of the motor. Realize the DC low voltage ride through of the frequency converter, provide active support when the grid voltage drops temporarily, and reduce the risk of motor shutdown caused by DC undervoltage shutdown of the frequency converter.

Zero pollution: DCPM itself does not generate harmonics in the AC power grid system, has zero pollution to the power grid, and is environmentally friendly.

Maintenance free: Supercapacitors are maintenance free, have a long lifespan, reduce maintenance work, and lower the total cost of user applications.

详细参数 Teachnical data