CN201388063Y

CN201388063Y - Intelligent dynamic reactive power compensation controller

Info

Publication number: CN201388063Y
Application number: CN200920151716U
Authority: CN
Inventors: 席鸿儒
Original assignee: BEIJING SENSHUO ELECTRIC EQUIPMENT Co Ltd
Current assignee: BEIJING SENSHUO ELECTRIC EQUIPMENT Co Ltd
Priority date: 2009-04-21
Filing date: 2009-04-21
Publication date: 2010-01-20
Anticipated expiration: 2019-04-21

Abstract

The utility model discloses an intelligent dynamic reactive power compensation controller comprising a current and voltage transformer, a filter circuit, a channel selection circuit, a modulate circuit, an externally arranged A/D analog-digital converter, a DSP (digital signal processor) which are electrically connected in sequence. A led-in circuit is accessed to the DSP through an optocoupler and a bus, the DSP is accessed to a led-out circuit via I/O and is electrically connected with an RAM, the channel selection circuit is electrically connected between the filter circuit and the modulate circuit, and the DSP is accessed to the channel selection circuit via I/O as well. Compared with the prior art, the utility model has the advantages of high sampling precision, good real-time control effect, refrained ultra harmonics, as well as synchronous sampling of three-phase AC voltage and current due to the adoption of the channel selection circuit.

Description

A kind of Intelligent Dynamic idle compensating control

Technical field

The utility model relates to a kind of power system reactive power compensation device, particularly a kind of Intelligent Dynamic idle compensating control.

Background technology

Voltage is one of leading indicator of the quality of power supply, and the stabilization of power grids and power equipment safety operation, line loss, industrial or agricultural safety in production, product quality, electricity consumption unit consumption and people's lives electricity consumption are all had a direct impact.Reactive power is an important factor that influences quality of voltage, we can say, voltage problem is exactly idle problem in essence.Reactive power compensation is the important component part of power network construction and transformation, and it is to keep the network reactive balance, improves quality of voltage, reduces the effective measures of via net loss, has crucial meaning.

At present, reactive power compensation of the prior art and voltage-regulation still adopt traditional regulative mode, and on-load tap-changing transformer, electrostatic condenser etc. can only manual adjustments and switchings, can not realize real-time pressure regulation or reactive power compensation.And some have formed the intelligent reactive power compensation controller of product, great majority utilize the chip microcontroller intellectuality, but because the function of single-chip microcomputer is limit, often the existence sampling can not be synchronous, sampling precision is not enough, controls poor effect in real time, and complicated algorithm can't be realized, complicated operation, and the very difficult shortcoming that suppresses high order harmonic component.

The utility model content

Technical problem to be solved in the utility model is, at above-mentioned prior art present situation, and provide that a kind of real-time is good, sampling precision is high, easy to operate, the Intelligent Dynamic idle compensating control that can suppress high order harmonic component.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of Intelligent Dynamic idle compensating control, comprise the current and potential transformer that is electrically connected successively, filter circuit, channel selection circuit, modulate circuit, external A/D analog to digital converter, dsp processor, open into circuit and insert described dsp processor through optocoupler and bus, dsp processor inserts digital output circuit through I/O, dsp processor is electrically connected mutually with RAM, it is characterized in that: at described filter circuit, be electrically connected between the modulate circuit, dsp processor inserts described channel selection circuit through I/O; The above analog switch of 64 passages that described channel selection circuit comprises and connects, the control end A0 of analog switch is connected with the I/O of dsp processor with A1, and 6 output channels are connected to external A/D analog to digital converter through modulate circuit.

For program is monitored, to prevent program fleet, described dsp processor interconnects through I/O and watchdog circuit; The time of taking place for the accurate recording incident, with the described dsp processor of real time clock circuit with interconnect.

In order to realize man-machine interaction, described dsp processor interconnects through asynchronous serial port and touch-screen.

In order to have realized the storage of setting parameter, described dsp processor interconnects through bus and FLASH.

Compared with prior art, advantage of the present utility model is, and is very synchronous to the sampling of three-phase alternating voltage electric current because it has adopted channel selection circuit, the sampling precision height, and it is good to control effect in real time, and has suppressed high order harmonic component.

Description of drawings

Fig. 1 is a circuit structure block diagram of the present utility model;

The internal circuit configuration schematic diagram of the channel selection circuit 3 that Fig. 2 is.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, 2, a kind of Intelligent Dynamic idle compensating control, current and potential transformer 1, filter circuit 2, channel selection circuit 3, modulate circuit 4, external A/D analog to digital converter 5, dsp processor 6 are electrically connected successively, dsp processor 6 inserts described channel selection circuit 3 through I/O, open into circuit 7 and insert described dsp processor 6, to detect outside digital quantity through optocoupler and bus; Dsp processor 6 inserts digital output circuit 8 through I/O, exerts oneself with switching or change the idle of power capacitor of realizing electric capacitor; Dsp processor 6 is electrically connected mutually with RAM 9, realizes the operation to data and program; Above or the analog switch more than four of 64 passages that described channel selection circuit 3 comprises and connects, the control end A0 of analog switch is connected with the I/O of dsp processor 6 with A1, and 6 output channels are connected to external A/D analog to digital converter 5 through modulate circuit 4.

Described dsp processor 6 is through I/O and watchdog circuit 61, and watchdog circuit is monitored the dsp processor program, to prevent program fleet; Dsp processor 6 interconnects through I/O and real time clock circuit 62, is used for the time that the accurate recording incident takes place; Described dsp processor 6 interconnects through asynchronous serial port and touch-screen 63, realizes man-machine interaction; Described dsp processor 6 interconnects through bus and FLASH64, has realized the storage of setting parameter.

Operation principle of the present utility model is as follows:

As shown in Figure 1, the voltage in three phases current signal of current and potential transformer 1 output is after filtration behind the wave circuit 2, by channel selection circuit 3 gatings, the three-phase voltage electric current can be gathered simultaneously, enter external A/D analog to digital converter 5 through the signal behind the modulate circuit 4, the data that external A/D analog to digital converter 5 converts are imported dsp processor 6 into by data/address bus.Dsp processor 6 carries out the electrical network parameter that fast Fourier analysis and harmonic analysis obtain comprising voltage effective value, current effective value, active power, reactive power and power factor by the data of gathering.By comparing, select the switching electric capacitor or change the idle of capacitor to exert oneself to realize dynamic reactive power compensation with the setting parameter that is kept in the FLSAH memory.

As shown in Figure 2, channel selection circuit 3 has adopted 6 the 4 above analog switches of passage, and the three-phase voltage electric current of same sampled point is connected with the same road input of each analog switch.The control end A0 of analog switch is connected with the I/O mouth of dsp processor 6 with A1.Like this, dsp processor 6 just can be controlled the same road signal of analog switch by gating, enters external A/D analog to digital converter then simultaneously, has just realized the synchronous acquisition of three-phase voltage electric current.

Claims

1, a kind of Intelligent Dynamic idle compensating control, comprise the current and potential transformer (1) that is electrically connected successively, filter circuit (2), modulate circuit (4), external A/D analog to digital converter (5), dsp processor (6), open into circuit (7) and insert described dsp processor (6) through optocoupler and bus, dsp processor (6) inserts digital output circuit (8) through I/O, dsp processor (6) is electrically connected mutually with RAM (9), it is characterized in that: in described filter circuit (2), electrical connecting passage is selected circuit (3) between the modulate circuit (4), and dsp processor (6) inserts described channel selection circuit (3) through I/O.

2, Intelligent Dynamic idle compensating control according to claim 1, it is characterized in that: the above analog switch of 64 passages that described channel selection circuit (3) comprises and connects, the control end A0 of analog switch is connected with the I/O of dsp processor (6) with A1, and 6 output channels are connected to external A/D analog to digital converter (5) through modulate circuit (4).

3, Intelligent Dynamic idle compensating control according to claim 2 is characterized in that: described dsp processor (6) interconnects through I/O and watchdog circuit (61), real time clock circuit (62).

4, Intelligent Dynamic idle compensating control according to claim 3 is characterized in that: described dsp processor (6) interconnects through serial ports and touch-screen (63).

5, according to the described Intelligent Dynamic idle compensating control of the arbitrary claim of claim 1 to 4, it is characterized in that: described dsp processor (6) interconnects through bus and FLASH (64).