CN201726137U

CN201726137U - Safe compensating device matched with low-pressure dynamic wave filtering device

Info

Publication number: CN201726137U
Application number: CN2010201695382U
Authority: CN
Inventors: 刘富刚; 崔军军; 张永
Original assignee: LANGFANG IN-POWER ELECTRIC Co Ltd
Current assignee: Beijing IN-Power Electric Co., Ltd.
Priority date: 2010-04-26
Filing date: 2010-04-26
Publication date: 2011-01-26
Anticipated expiration: 2020-04-26

Abstract

The utility model provides a safe compensating device matched with a low-pressure dynamic wave filtering device. The safe compensating device is used in a main loop structure of a passive filter, wherein a main loop comprises a reactor and a matched capacitor set. The safe compensating device is characterized in that a circuit structure of the main loop is additionally provided with a switching compensation circuit; the compensation circuit comprises a signal sampling circuit, a control circuit communicated with a computer and a controllable silicon module circuit arranged between a power source and a set of reactors in the main loop; the signal sampling circuit acquires a current signal and a voltage signal on the power source, transmits the current signal and the voltage signal to the computer by the control circuit, and transmits a control command to the control circuit after the current signal and the voltage signal are processed by the computer; and the control circuit outputs a code gating signal to a controlled end of the controllable silicon module circuit. The safe compensating device replaces a contactor for switching in the prior art with the assembly of the controllable silicon and the control chip, is applied to the switching of passive filtering with the advantage that the controllable silicon has fast response speed, and guarantees the running reliability of the control precision.

Description

Safety allowance device with low pressure dynamic filter matched with devices

Technical field

The utility model belongs to low pressure dynamic filter compensation technique field, relates to the safety allowance device that the safety allowance device, particularly corresponding speed that use with the dynamic filter matched with devices are fast, realize the quick and smooth switching.

Background technology

In passive Dynamic Filtering field, in order to suppress the enormous impact that harmonic wave brings electrical network, often adopt the mode of switching reactor to carry out harmonic compensation, by gathering electric current, the voltage data in the electrical network, and judgement harmonic component, and then dynamic switching reactor and adjustment coupling, realize filtering harmonic wave to the full extent, improve power factor.The switching of reactor generally adopts the contactor switching mode in the prior art, contactor relatively simple for structure, but it can't adapt to the quick variation of load well, so compensation effect is unsatisfactory.Compensation effect is undesirable, probably load is caused certain harm, for example bigger power loss in spread of voltage, flickering, overcurrent and the distribution network.

Summary of the invention

The purpose of this utility model is to solve reactor adapts to network load when switching quick variation, and then provide good compensation effect, designed safety allowance device with low pressure dynamic filter matched with devices, the switching compensating circuit adopts the combination of controllable silicon and control chip, by the switching of control chip to silicon controlled control realization reactor.

The utility model for realizing the technical scheme that goal of the invention adopts is, safety allowance device with low pressure dynamic filter matched with devices, above safety allowance device is used for the major loop structure of passive filter, comprise reactor and matching capacitor group in the major loop, key is to have additional the switching compensating circuit in the circuit structure of major loop, comprise signal sample circuit in the switching compensating circuit, control circuit with the computer communication, and be arranged on silicon controlled module circuit between the reactor in power supply and the one group of major loop, signal sample circuit is gathered the electric current on the power supply, voltage signal, and send computer to by control circuit, transmitting control commands is to control circuit after the Computer Processing, and control circuit output encoder gating signal is to the controlled end of silicon controlled module circuit.

In the utility model the contactor that is used for switching in the prior art is replaced with the combination of controllable silicon and control chip, utilized the fast advantage of controllable silicon response speed to be applied in the switching of passive filtering, guaranteed the operational reliability of control precision.

Below in conjunction with accompanying drawing the utility model is elaborated.

Description of drawings

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

Fig. 2 is the circuit embodiments of major loop in the utility model.

Fig. 3 is the circuit embodiments of signal sample circuit and control circuit in the utility model.

In the accompanying drawing, the 1st, signal sample circuit, the 2nd, control circuit, the 3rd, the silicon controlled module circuit, the 4th, computer, FU are fuses, and T is a thyristor, and L is a reactor, and C is the capacitor group, and TA is a D.C mutual-inductor, and U1 is a process chip.

Embodiment

Referring to Fig. 1, safety allowance device with low pressure dynamic filter matched with devices, above safety allowance device is used for the major loop structure of passive filter, comprise reactor L and matching capacitor group C in the major loop, in the circuit structure of major loop, have additional the switching compensating circuit, comprise signal sample circuit 1 in the switching compensating circuit, control circuit 2 with computer 4 communications, and be arranged on silicon controlled module circuit 3 between the reactor L in power supply and the one group of major loop, the electric current that signal sample circuit 1 is gathered on the power supply, voltage signal, and send computer 4 to by control circuit 2, computer 4 is handled the back transmitting control commands to control circuit 2, and control circuit 2 output encoder gating signals are to the controlled end of silicon controlled module circuit 3.

Referring to Fig. 2 and Fig. 3, comprise D.C mutual-inductor TA and supporting Resistor-Capacitor Unit in the above-mentioned signal sample circuit 1, electric current, the voltage signal on the D.C mutual-inductor 1 collection power supply is sent to the input of control circuit 2.

The resistive element that comprises process chip U1 and peripheral matched in the above-mentioned control circuit 2, process chip U1 receives electric current, the voltage signal that D.C mutual-inductor TA sends, handle the back and being sent to computer 4, by the order output encoder gating signal of computer 4 controlled end to silicon controlled module circuit 3 by communication interface.

Comprise thyristor T in the above-mentioned silicon controlled module circuit 3, thyristor T realizes the connection of major loop by the control of process chip U1.

The model of process chip U1 is BKR-06R-MB.

The utility model is used to the concentrated reactive power compensation with the three phase network of harmonic load.By series reactor, make and have only a small amount of harmonic wave to flow into the compensation circuit of charged anti-protection.And dynamic security compensation the complete sets of equipment are substituted by high-speed controller and thyristor power model TCD by traditional controller and contactor.

During concrete enforcement, be connected with the major loop that one group of reactor and supporting capacitor group constitute in three phase network, all be provided with thyristor T in each group major loop, all thyristor T are connected the control signal output ends of process chip U1.By signal sample circuit 1 electric current in the electrical network, voltage are sent to computer 4, computer 4 draws harmonic signal after handling by in house software, and the reactor that calculates required switching, and send the coding gating signal to each thyristor by process chip U1, realize the quick switching of reactor.

Utilize the circuit of the utility model design, can realize level and smooth switching.The legacy equipment of use contactor switching can produce transient state and shove, and this not only has influence on compensating element,, also can bring harm to the miscellaneous equipment on the electrical network simultaneously.Dynamic reactive compensation device can be realized the zero crossing switching, thereby has avoided transient interference fully; Owing to be contactless throw-in and throw-off, the handover operation number of times of dynamic filter compensation arrangement is unrestricted.In addition, the non-transient handoff procedure has alleviated the burden of fuse, thereby has prolonged their useful life greatly.The may command thuristor throw-in and throw-off mixes output, self adaptation, and variable step control detects automatically, and the optimal compensating capacitor switching guarantees system safety operation; Standard communication (RS485) can realize remote real time monitoring and computer networking management.

Claims

1. with the safety allowance device of low pressure dynamic filter matched with devices, above safety allowance device is used for the major loop structure of passive filter, comprise reactor (L) and matching capacitor group (C) in the major loop, it is characterized in that: in the circuit structure of major loop, have additional the switching compensating circuit, comprise signal sample circuit (1) in the switching compensating circuit, control circuit (2) with computer (4) communication, and be arranged on silicon controlled module circuit (3) between the reactor (L) in power supply and the one group of major loop, signal sample circuit (1) is gathered the electric current on the power supply, voltage signal, and send computer (4) to by control circuit (2), computer (4) is handled the back transmitting control commands to control circuit (2), and control circuit (2) output encoder gating signal is to the controlled end of silicon controlled module circuit (3).

2. the safety allowance device of according to claim 1 and low pressure dynamic filter matched with devices, it is characterized in that: comprise D.C mutual-inductor (TA) and supporting Resistor-Capacitor Unit in the described signal sample circuit (1), electric current, the voltage signal on D.C mutual-inductor (1) the collection power supply is sent to the input of control circuit (2).

3. the safety allowance device of according to claim 1 and low pressure dynamic filter matched with devices, it is characterized in that: the resistive element that comprises process chip (U1) and peripheral matched in the described control circuit (2), process chip (U1) receives electric current, the voltage signal that D.C mutual-inductor (TA) is sent, handle the back and being sent to computer (4), by the order output encoder gating signal of computer (4) controlled end to silicon controlled module circuit (3) by communication interface.

4. the safety allowance device of according to claim 1 and low pressure dynamic filter matched with devices, it is characterized in that: comprise thyristor (T) in the described silicon controlled module circuit (3), thyristor (T) is realized the connection of major loop by the control of process chip (U1).