CN204928146U - A pole-mounted active filtering device with a time-sharing energy storage circuit - Google Patents

Abstract

The utility model relates to an active power filter device on post with timesharing tank, the device sets up on outdoor post for carry out the electric power compensation to load side circuit, including timesharing energy storage component and the current transformer who connects gradually, ARM controller, PWM circuit and converter, timesharing energy storage component, current transformer and converter all with load side circuit connection, the timesharing energy storage component be connected with converter and ARM controller respectively. Compared with the prior art, the utility model has the advantages of take up an area of little, the operation is reliable, application scope wide, the timesharing energy storage.

Description

A pole-mounted active filtering device with a time-sharing energy storage circuit

technical field

The utility model relates to an electric power active filter device, in particular to an on-column active filter device with a time-sharing energy storage circuit.

Background technique

Harmonics caused by non-linear loads also bring serious negative effects, especially with the rapid development of power electronics technology, various power electronic devices are increasingly widely used in power generation, transmission, distribution and power consumption systems. The harmonic and reactive power pollution brought by the power grid is also gradually serious. At the same time, with the advancement of social informatization and the wide application of sensitive loads (such as computer control systems, precision electronic equipment, etc.), higher requirements are placed on power quality.

Utility model content

The purpose of this utility model is to provide an on-column active filter device with a time-sharing energy storage circuit with a small footprint, reliable operation, wide application range, and time-sharing energy storage in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

An on-column active filtering device with a time-sharing energy storage circuit, which is installed on an outdoor column for power compensation of the load-side circuit, including a time-sharing energy storage component and sequentially connected current transformers, ARM A controller, a PWM circuit and a converter, the time-sharing energy storage components, current transformers and converters are all connected to the load side circuit, the time-sharing energy storage components are respectively connected to the converter and the ARM controller connect.

The ARM controller includes an AD converter and a processor, the current transformer, AD converter, processor and PWM circuit are connected in sequence, and the processor is connected with a time-sharing energy storage component.

The time-sharing energy storage component includes interconnected energy storage elements and a boost voltage regulator circuit, the energy storage elements are connected to the converter as the power supply of the converter, and the boost voltage regulator circuits are respectively Interface with ARM controller and load side circuit.

The pole-mounted power active filter device is installed on the outdoor pole at a height of 4.5-5m, and the outside is covered with a plastic shell.

The device also includes a display and an alarm, and the display and the alarm are respectively connected with the ARM controller.

The converter is a bidirectional converter.

The model of the ARM controller is ARM10.

The converter, the energy storage element and the voltage boosting and stabilizing circuit described above are all prior art.

Compared with the prior art, the utility model has the following advantages:

1. Small footprint and reliable operation: the device is applied to the outdoor column, and the occupied area is greatly reduced, which solves the problems of weather disaster prevention, external force damage prevention and heat dissipation in the operation and maintenance of traditional outdoor compensation devices, and can effectively save land resources, expand the development space of urban power grids, and improve the reliability of power supply.

2. Wide range of application: the utility model can be widely used in urban downtown areas, landscape areas, residential quarters and other places. It is suitable for various conventional loads and sensitive loads, which reduces the pressure on the construction of distribution transformers in urban areas, and is easy to install and flexible to configure. changeable.

3. Time-sharing energy storage: the utility model can also carry out time-sharing energy storage while eliminating harmonics in the system, absorbing electric energy from the grid during the low power consumption period, and storing it through time-sharing energy storage components, and storing it in the peak period of power consumption Released for use by the DC side of the compensation device. Thereby eliminating the peak and valley difference between day and night, so that the power equipment can be used more effectively. In addition, in the power system with a high penetration rate of distributed power, the output power of distributed power can be controlled and adjusted through the charging and discharging of time-sharing energy storage components, which can better solve the problems of uncontrollable distributed power and large power fluctuations. problems, promote the application of renewable energy and the promotion of distributed power generation technology, and reduce the consumption of conventional energy.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Wherein, 1. load, 2. current transformer, 3. ARM controller, 4. PWM circuit, 5. inverter, 61. energy storage element, 62. step-up voltage stabilizing circuit.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

An active filtering device on a pole with a time-sharing energy storage circuit, which is installed on an outdoor pole to perform power compensation for the load-side circuit, including a time-sharing energy storage component and a current transformer connected in sequence 2, ARM controller 3, PWM circuit 4 and converter 5, the time-sharing energy storage component, current transformer 2 and converter 5 are all connected to the load side circuit, and the time-sharing energy storage component is connected to the converter 5 and ARM control respectively Device 3 is connected.

ARM controller 3 includes AD converter and processor, current transformer 2, AD converter, processor and PWM circuit 4 are connected sequentially, processor is connected with time-sharing energy storage assembly, time-sharing energy storage assembly includes interconnected An energy element 61 and a boost voltage regulator circuit 62, the energy storage element 61 is connected to the converter 5, as the power supply of the converter 5, the boost voltage regulator circuit 62 is respectively connected to the ARM controller 3 and the load side circuit.

The pole-mounted power active filtering device is installed on the outdoor pole at a height of 4.5-5m, and the outside is covered with a plastic shell. The converter 5 is a bidirectional converter, and the model of the ARM controller 3 is ARM10.

The utility model can compensate the harmonic generated by the nonlinear load on the load side, and improve the power quality of the system side. The current on the load side is detected by the current transformer 2, and calculated by the ARM controller 3 to extract the harmonic components in the load current, and then the PWM wave is generated by controlling the PWM circuit 4 and sent to the internal IGBT, and the inverter 5 is controlled to generate a sum The load harmonic currents are equal in size and opposite in direction and injected into the grid to achieve the purpose of filtering.

The utility model can also perform time-sharing energy storage while eliminating harmonics in the system, absorb electric energy from the power grid during the low power consumption period, store it through the energy storage element 61, and release it for the converter 5 DC during the peak period of power consumption side use. Thereby eliminating the peak and valley difference between day and night, so that the power equipment can be used more effectively. In addition, in a power system with a high penetration rate of distributed power, the output power of the distributed power can be controlled and adjusted through the charging and discharging of the energy storage system, which can better solve the problems of uncontrollable distributed power and large power fluctuations. Promote the application of renewable energy and the promotion of distributed power generation technology to reduce the consumption of conventional energy.

The energy storage element 61 can be a battery pack or a supercapacitor, and the ARM controller 3 controls energy storage and release.

The function of the energy storage element 61 is to shave peaks and fill valleys, store electricity when the electricity consumption is low, and send electricity out when the electricity consumption is peak, so as to achieve the purpose of balancing the power load. The utility model can save comprehensive electricity cost, absorb electric energy at low cost, release it at peak time, and obtain economic benefits brought by peak-valley electricity price difference.

Secondly, the utility model can also play an important role in the establishment of the DC side voltage when starting, thereby simplifying the starting of the converter 5 and facilitating the stable operation of the converter 5 .

At the same time, the time-sharing energy storage component can temporarily provide DC voltage support for the converter 5 when the DC side of the converter 5 fails, improving system protection redundancy.

Claims (7)

1. An active filtering device on a column with a time-sharing energy storage circuit, characterized in that the device is arranged on an outdoor column to perform power compensation to the load side circuit, including a time-sharing energy storage component and sequentially connected The current transformer (2), ARM controller (3), PWM circuit (4) and converter (5), the time-sharing energy storage component, current transformer (2) and converter (5) Both are connected to the load-side circuit, and the time-sharing energy storage components are respectively connected to the converter (5) and the ARM controller (3). 2. a kind of active filtering device on the post with time-sharing energy storage circuit according to claim 1, is characterized in that, described ARM controller (3) comprises AD converter and processor, and described A current transformer (2), an AD converter, a processor and a PWM circuit (4) are connected in sequence, and the processor is connected with a time-sharing energy storage component. 3. A kind of post active filter device with time-sharing energy storage circuit according to claim 1, is characterized in that, described time-sharing energy storage assembly comprises interconnected energy storage elements (61) and Voltage regulator circuit (62), described energy storage element (61) is connected with converter (5), as the power supply of converter (5), described step-up regulator circuit (62) is connected with ARM respectively The controller (3) is connected to the load side circuit. 4. A kind of pole-mounted active filter device with time-sharing energy storage circuit according to claim 1, is characterized in that, the height that described pole-mounted electric power active filter device is set on the outdoor pole is 4.5- 5m, and the outside is covered with a plastic shell. 5. The active filtering device on a column with a time-sharing energy storage circuit according to claim 1, characterized in that, the device also includes a display and an alarm, and the described display and the alarm are respectively connected with the ARM control Connector (3). 6. The pole-mounted active filtering device with a time-sharing energy storage circuit according to claim 1, characterized in that the converter (5) is a bidirectional converter. 7. A pole-mounted active filtering device with a time-sharing energy storage circuit according to claim 1, characterized in that the model of the ARM controller (3) is ARM10.