CN201937277U

CN201937277U - Intelligent low-voltage reactive-power compensating device

Info

Publication number: CN201937277U
Application number: CN2011200625531U
Authority: CN
Inventors: 韩会涛; 刘庆文
Original assignee: LAIWU KETAI POWER-TECH CO LTD
Current assignee: Shandong Kaitai electrical Limited by Share Ltd
Priority date: 2011-03-01
Filing date: 2011-03-01
Publication date: 2011-08-17
Anticipated expiration: 2021-03-01

Abstract

The utility model discloses an intelligent low-voltage reactive-power compensating device, which comprises a low-voltage split-phase compensating-box body, a knife-melting switch, a low-voltage fuse group, an intelligent compound-switch group, a capacitor group and a power-distribution monitoring unit, wherein the power-distribution monitoring unit comprises a central control MPU (Micro Processing Unit), a power-supply module, a signal acquisition module, a self-checking module, a reactive-power compensation control module, a human-computer interaction module, a communication module, a warning module, an anti-theft module and a data storage module, and each module is respectively connected with a data bus of the central control MPU; and in the low-voltage split-phase compensating-box body, one end of the knife-melting switch is connected with an electric-network side, the other end of the knife-melting switch is connected with the low-voltage fuse group, one end of the intelligent compound-switch group is connected with the capacitor group, the other end of the intelligent compound-switch group is connected with the low-voltage fuse group, and the power-distribution monitoring unit is connected with the intelligent compound-switch group. In the utility model, the abnormity of a main board of the power-distribution monitoring unit, an I/O (Input/Output) board, a communication template and a clock can be automatically diagnosed through the self-checking module, remote upgrading terminal software is supported, and the intelligent low-voltage reactive-power compensating device has self-checking and self-restoring functions; and the reactive-power compensation control module can be used for automatically switching the capacitor group according to a set target power-factor value to realize the local balancing of reactive power.

Description

The intelligent low-pressure reactive power compensator

Affiliated technical field

The utility model relates to a kind of low-voltage reactive compensator capable that is used for electric power system, refer in particular to and a kind ofly control with power monitoring unit, reactive power and voltage by the monitoring load is crossed, undervoltage condition, hierarchical capacitor is carried out the low-voltage reactive compensator capable of phase-splitting switching.

Background technology

Along with industry, the continuous increase of commerce and residential electric power amount, as air-conditioning, electric equipment products such as refrigerator mainly are power with the miniature motor, need to consume a large amount of reactive powers, reactive power compensator is installed can compensate reactive power, reduce the loss of voltage, improve the distribution transforming utilance, but how reactive power compensation designs, how the equipment operation life-span guarantees, whether operation maintenance is reasonable, should consider economic investment, reach target effect again, the low-voltage reactive compensator capable collection load monitoring that adopts power monitoring unit to control, data acquisition, reactive power compensation control and one, for wastage reducing and energy saving is that traditional compensation arrangement is difficult to be competent at, this installation cost is low, the reliability height, and the work maintenance is few.Along with the complexity of modern embedded system is more and more higher, the core of embedded system is embedded microprocessor and embedded OS, early stage embedded system hardware core is various types of 8 and 16 single-chip microcomputers, and 32 ARM kernels of technical grade MPU progressively occupies high-end market with powerful processing disposal ability, and the function of embedded system has obtained great enhancing.

Summary of the invention

The purpose of this utility model is to provide a kind of and overcomes above-mentioned shortcoming, and a kind of modularized design, networking is simple, reliable, operating cost is low intelligent low-pressure reactive power compensator are provided.

The utility model is achieved in that a kind of intelligent low-pressure reactive power compensator, comprise low pressure phase splitting compensation casing, switch with knifeshaped fuse, low-tension fuse group, intelligent compound switch group, capacitor group and power monitoring unit, power monitoring unit comprises the control MPU of central authorities, power module, signal acquisition module, selftest module, reactive power compensation control module, human-computer interaction module, communication module, alarm module, anti-theft module, data memory module, and each module is connected with the data/address bus of the control MPU of central authorities respectively; In the low-voltage compensation casing, switch with knifeshaped fuse one end is connected with grid side, and an end is connected with the low-tension fuse group, and intelligent compound switch group one end is connected with the capacitor group, and an end is connected with the low-tension fuse group, and power monitoring unit is connected with the intelligent compound switch group.The utility model by signal acquisition module obtain in the electrical network three-phase voltage, three-phase current, forward and reverse meritorious/data such as reactive power, power factor, the signal that collects after central MPU analyzes, can draw instantaneous power, accumulative total electric weight, results such as rate of qualified voltage statistics, power factor qualification rate statistics, Harmonics Calculation, for unusual, out-of-limit statistical analysis mechanism, processor sends alarm signal to alarm module, sends alarm data by alarm module to the related personnel; Memory module can be stored real time data and current data and various curve data; The intact data of signal acquisition module collection send to master station computer by communication module with wireless network; Human-computer interaction module can carry out the on-the-spot inquiry that reaches information of revising to important parameter; Selftest module can carry out automatic diagnosis unusually to power monitoring unit mainboard, I/O plate, communication template, clock, and supports the remote upgrade terminal software, has self check and self-recovering function; The reactive power compensation control module can be carried out automatic switching to the capacitor group by the target power factor value that is provided with, and realizes the reactive power in-situ balance; Anti-theft module adopts the modularized design of absolute construction, and power monitoring unit forms a whole, and is low in energy consumption according to simply, can warn illegal personnel near this device.

Infrared/RS232 interface module that the utility model power monitoring unit also is provided with can be carried out communication with PC and mobile phone by this interface, finishes programming, parameter setting and checks meter, and also can inquire about the power monitoring unit various information; The described control MPU of central authorities is for adopting the MPU of 32 ARM kernels of technical grade, and its data-handling capacity is strong; Described human-computer interaction module comprises keyboard and LCD display; Data memory module is the FLASH flash memory, and memory data output is big, volume is little; Communication module is the Modem based on the GRPS network.

The beneficial effects of the utility model are, can substitute traditional low-voltage reactive compensator capable at present, but real time on-line monitoring, control various electric parameters, realize compensating the reliability height as required.

Description of drawings

Fig. 1 is a system framework schematic diagram of the present utility model.

Among the figure: 1. signal acquisition module, 2. reactive power compensation control module, 3. human-computer interaction module, 4. communication module, 5. anti-theft module, 6. data memory module, 7. alarm module, 8. power monitoring unit, 9. selftest module, 10. power module, 11. electrical networks, 12. switch with knifeshaped fuse, 13. the low-tension fuse group, 14. intelligent compound switch groups, 15. capacitor groups, 16. low pressure phase splitting compensation casing, the control MPU of 17. central authorities.

Embodiment

As shown in Figure 1, described intelligent low-pressure reactive power compensator comprises low pressure phase splitting compensation casing (16), switch with knifeshaped fuse (12), low-tension fuse group (13), intelligent compound switch group (14), capacitor group (15) and power monitoring unit (8), power monitoring unit (8) comprises the control MPU (17) of central authorities, power module (10), signal acquisition module (1), selftest module (9), reactive power compensation control module (2), human-computer interaction module (3), communication module (4), alarm module (7), anti-theft module (5), data memory module (6), each module are connected with the data/address bus of the control MPU of central authorities (17) respectively; In low-voltage compensation casing (16), switch with knifeshaped fuse (12) one ends are connected with electrical network (11) side, one end is connected with low-tension fuse group (13), intelligent compound switch group (14) one ends are connected with capacitor group (15), one end is connected with low-tension fuse group (13), and power monitoring unit (8) is connected with intelligent compound switch group (14).The utility model by signal acquisition module (1) obtain in electrical network (11) side three-phase voltage, three-phase current, forward and reverse meritorious/data such as reactive power, power factor, the signal that collects after central MPU (17) analyzes, can draw instantaneous power, accumulative total electric weight, results such as rate of qualified voltage statistics, power factor qualification rate statistics, Harmonics Calculation, for unusual, out-of-limit statistical analysis mechanism, processor sends alarm signal to alarm module (7), sends alarm data by alarm module (7) to the related personnel; Data memory module (6) can be stored real time data and current data and various curve data; The data that signal acquisition module (1) has been gathered by communication module (4) with the anti-master station computer of giving of wireless network; Human-computer interaction module (3) can carry out the on-the-spot inquiry that reaches information of revising to important parameter; Selftest module (9) can carry out automatic diagnosis unusually to power monitoring unit (8) mainboard, I/O plate, communication module (4), clock, and supports the remote upgrade terminal software, has self check and self-recovering function; Reactive power compensation control module (2) can be carried out automatic switching to capacitor group (15) by the target power factor value that is provided with, and realizes the reactive power in-situ balance; Anti-theft module (5) adopts the modularized design of absolute construction, and power monitoring unit (8) forms a whole, and is low in energy consumption according to simply, can warn illegal personnel near this device.

The utility model power monitoring unit (8) also is provided with infrared/RS232 interface module, can carry out communication with PC and mobile phone by this interface, finishes programming, parameter setting and checks meter, and also can inquire about power monitoring unit (8) various information; The described control MPU of central authorities (17) are for adopting the MPU of 32 ARM kernels of technical grade, and its data-handling capacity is strong; Described human-computer interaction module (3) comprises keyboard and LCD display; Data memory module (6) is that the FLASH flash memory is big according to memory space, volume is little; Communication module (4) is the Modem based on the GRPS network, can directly carry out remote data acquisition with the GPRS communication mode, the operational reliability height, by communication module (4) from remote machine download and upgrade code and be kept in the FLASH flash memory, in the control MPU (17) of the central authorities fill order wiping and copy command is realized code update to the FLASH flash memory.

Claims

1. an intelligent low-pressure reactive power compensator comprises low pressure phase splitting compensation casing, switch with knifeshaped fuse, low-tension fuse group, intelligent compound switch group, capacitor group, it is characterized in that: in the low pressure phase splitting compensation casing power monitoring unit is set.

2. intelligent low-pressure reactive power compensator according to claim 1 is characterized in that: power monitoring unit comprises the control MPU of central authorities, power module, signal acquisition module, reactive power compensation control module, human-computer interaction module, communication module, anti-theft module, data memory module.

3. intelligent low-pressure reactive power compensator according to claim 2 is characterized in that: power monitoring unit also is provided with alarm module and selftest module.

4. according to claim 2 or 3 described intelligent low-pressure reactive power compensators, it is characterized in that: power monitoring unit also is provided with infrared/RS232 interface module, and communication module is the Modem based on the GRPS network.

5. according to claim 2 or 3 or 4 described intelligent low-pressure reactive power compensators, it is characterized in that: the described control MPU of central authorities is for adopting the MPU of 32 ARM kernels of technical grade.