CN201260079Y

CN201260079Y - Synthetic apparatus for power distribution monitoring and intelligent passive optimization

Info

Publication number: CN201260079Y
Application number: CNU2008201848821U
Authority: CN
Inventors: 张俊生; 林航; 黄前华
Original assignee: ANHUI JIYUAN POWER SYSTEM TECHNOLOGY Co Ltd
Current assignee: ANHUI JIYUAN POWER SYSTEM TECHNOLOGY Co Ltd
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2009-06-17
Anticipated expiration: 2018-08-29

Abstract

Disclosed is a power distribution monitoring and intelligent reactive power optimization integrated device, which is characterized in that: the device comprises a circuit breaker QF, a controller TTU and a compensating capacitor bank C, wherein, the circuit breaker QF is connected between the device and system three-phase lines of A, B and C in series, the circuit breaker QF is closed to cause the controller TTU to get to work; the controller TTU calculates the system reactive power by detecting the amplitude and phase difference of system three-phase voltage and three-phase current, compares the values with set input threshold quantity and cut-off threshold quantity, and controls the inputting or withdrawing of compensating capacitors C through a combination switch FK; and the compensating capacitor bank C is input or withdraws from the system in groups and phases under the control of the controller TTU. The utility model employs the working mode of balance on the spot, and can effectively reduce the electrical loss, increase the voltage qualification rate, and improve the reliability of equipment running.

Description

Distribution monitoring and intelligent idle work optimization integration unit

Technical field

The utility model relates to distribution monitoring and the idle work optimization integration unit in the equipment such as being applied to box change, outdoor distribution transforming, low-voltage complete.

Background technology

Because the continuous increase of net capacity requires also to grow with each passing day to electric network reactive-load.Reactive power is the same with active power, is to guarantee quality of power supply inalienable part.In electric power system, should keep reactive power balance, otherwise might will cause that voltage reduction, device damage, power factor descend, can make the voltage collapse of system when serious, cause large area blackout.

Domestic manufacturer and user solve reactive power optimization, when reducing the network loss problem except that adopt constant voltage transformer maximum be the employing static reactive power compensation, there is following problem in this compensation way:

1, after capacitor puts into operation, the condition of repaying a kindness often occurred, and sent idlely to electrical network, line voltage raises, and the safe operation of harm electrical network and equipment increases network loss, and rate of qualified voltage reduces.

2, after capacitor puts into operation, the undercompensation situation occurs, fully compensation network is idle, and power factor is low, and line voltage is low, and harm electrical network and equipment safety operation increase network loss, and rate of qualified voltage reduces.

3, minority adopts the product of dynamic passive compensation because " understandings " user and electrical network comprehensively only are " mending once lacking ", " how much lack benefit how much ", easily electrical network is impacted or frequent operation influences equipment life.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of distribution monitoring and intelligent idle work optimization integration unit are provided,, reduce electricity and decrease to realize the in-situ balancing of power system reactive power, improve rate of qualified voltage, improve the goal of the invention of the reliability of equipment operation.

The utility model technical solution problem adopts following technical scheme:

Distribution monitoring and intelligent idle work optimization integration unit, its design feature is that the formation of device comprises:

One circuit breaker Q F is serially connected between device and the triple line A of system, B, the C, and circuit breaker Q F closure is devoted oneself to work controller TTU;

One controller TTU, amplitude and phase difference by detection system three-phase voltage and three-phase current calculate system's reactive power, and compare in input thresholding of setting and excision thresholding, the input by combination switch FK control compensation capacitor C or withdraw from;

One compensation condenser group C is under the control of controller TTU, by combination switch FK grouping phase-splitting input or log off.

Design feature of the present utility model also is:

Described controller TTU adopts the DSP digital signal processing chip,, exports with switching value through AD conversion input and directly with the switching value input with analog quantity; Configuration RS485/232 communication serial ports and GPRS communication module, remote transmission distribution transforming information and capacitor input and excision information.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model is provided with the TTU controller, when reactive power vacancy value increases to set point, pulse makes it conducting capacitor is put into operation controller to the combination switch of appointment output zero cross fired, approach set point up to power shortage, when reactive power vacancy value drops to when being lower than set point, controller is stopped paying out start pulse signal and capacitor is withdrawed from, in order to avoid overtension.The working method of this in-situ balancing can effectively reduce the reliability that electricity decreased, improved rate of qualified voltage, improves equipment operation.

2, the utility model TTU controller adopts the DSP Digital Signal Processing, has realized the integrated of distribution monitoring and idle work optimization control.

3, the utility model is optimized the reactive power compensation Policy model by being provided with, but Automatic Cycle grouping phase-splitting switched capacitor prevented benefit, can adapt to part throttle characteristics different in the electrical network.

4, the utlity model has various communication interfaces such as GPRS, be easy to networking.

5, the utility model has been realized the combination of compensation arrangement and batch meter, and composite set helps reducing cost, and minimizing takes up room, and reduces maintenance workload.

Description of drawings

Fig. 1 constitutes schematic diagram for the utility model system.

Label among Fig. 1: QF circuit breaker, BL lightning arrester, FU fuse, FU1 fuse, FK combination switch, TTU controller, C capacitor group, LK switching indicator light.

Fig. 2 constitutes schematic diagram for the utility model controller:

Embodiment

Referring to Fig. 1, the setting in the present embodiment comprises:

Shown in Figure 2, controller is made up of 9 functional modules, i.e. analog quantity input and A/D change-over circuit, switching value input circuit, switching value output circuit, working power circuit, signal processing circuit unit, communicating circuit, house dog and system reset circuit, system's calendar clock circuit, analysis data storing circuit.

In the present embodiment, controller TTU adopts the DSP digital signal processing chip,, exports with switching value through AD conversion input and directly with the switching value input with analog quantity; Configuration RS485/232 communication serial ports and GPRS communication module, remote transmission distribution transforming information and capacitor input and excision information realize remote monitoring.

With three-phase voltage and the electric current in the controller TTU collection electrical network, and calculate actual each phase reactive power size and power factor, when the vacancy of the reactive power of certain phase increases to set point, when promptly satisfying capacitor input condition, controller drops into order to the combination switch FK output of appointment, combination switch KF promptly in voltage zero-cross conducting constantly, puts the capacitor C of corresponding phase into operation, approaches set point up to power shortage; Equally, when reactive power vacancy value drops to when being lower than set point, controller TTU removes the combination switch of appointment and drops into order, and combination switch FK promptly disconnects constantly at current over-zero, and the capacitor C of corresponding phase is removed, and sets requirement in advance up to satisfying.When the capacitor C of a certain phase put into operation, the switching indicator light lamp LK of corresponding phase lighted.

In concrete the enforcement, set the input of capacitor C and the threshold value of excision, reactive power is maintained in the scope of requirement, the locking value of voltage can be set, maximum current locking value, comprehensive harmonic wave locking value, capacitor input or cut-out delay time etc.

In addition, the intelligent compound switch FK that can adopt two-way antiparallel thyristor and magnetic maintained switch to form carries out the switching of power capacitor C, the combination switch FK of this version has the characteristics of silicon control zero-cross switching, and during normal the connection, have an advantage of magnetic maintained switch zero-power, electric arc impacts and causes the equipment of burning out when preventing switching, has improved the reliability of equipment operation.

The utility model is applicable to the 380V low voltage power distribution network, can be in indoor or outdoor installing and using.

Compensation way: three-phase compensation and phase splitting compensation combine, and benefit and branch are mended the mixed compensation mode that combines altogether, and the capacity of wherein mending altogether disposes one group according to distribution transformer capacity, divide to mend and can divide three groups of phase configuration, also can join according to customer requirements.Switching mode: the Automatic Cycle switching, i.e. the first disjunction of connecting earlier, the back connection of back disjunction, the capacitor group takes turns to operate.

Claims

1, distribution monitoring and intelligent idle work optimization integration unit is characterized in that the formation of device comprises:

2, distribution monitoring according to claim 1 and intelligent idle work optimization integration unit is characterized in that described controller TTU adopts the DSP digital signal processing chip,, export with switching value through AD conversion input and directly with the switching value input with analog quantity; Configuration RS485/232 communication serial ports and GPRS communication module, remote transmission distribution transforming information and capacitor input and excision information.