CN203690939U

CN203690939U - Reactive power compensation control device used under low-load or no-load state

Info

Publication number: CN203690939U
Application number: CN201420071177.6U
Authority: CN
Inventors: 夏红海
Original assignee: WEIHAI HUABANG FINE BLANKING Co Ltd
Current assignee: WEIHAI HUABANG FINE BLANKING Co Ltd
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2014-07-02
Anticipated expiration: 2024-02-19

Abstract

The utility model discloses a reactive power compensation control device used under a low-load or no-load state. The control device comprises a power grid, a 1000Kvar transformer and a compensation capacitor cabinet. A reactive power controller, a fuse, a current transformer and ten groups of capacitors are arranged in the compensation capacitor cabinet. The device is characterized in that the 10 groups of capacitors are one group of 3Kvar capacitors, two groups of 5Kvar capacitors, one group of 8Kvar capacitors and six groups of 20Kvar capacitors; the one group of 3Kvar capacitors, the two groups of 5Kvar capacitors, the one group of 8Kvar capacitors and the six groups of 20Kvar capacitors are connected in parallel with a low voltage end of the transformer through an alternating current contactor and a total air switch on the power grid respectively; a low voltage side of the transformer is provided with a 10Kvar compensation capacitor; the 10Kvar compensation capacitor is connected in parallel with the power grid of the low voltage side of the transformer via an air switch. The device possesses the following advantages that the structure is simple; energy wastes are reduced; expenditures are saved and so on.

Description

For the reactive compensation controlling device under underload or no load condition

Technical field

The utility model relates to electric equipment technical field, specifically a kind of for 1000Kvar transformer the reactive compensation controlling device under underload or no load condition.

Background technology

At present, the reactive power compensation electrical control cubicles configuring of existing power transformer all designs under full load condition according to transformer, the power transformer of the existing 1000KVA of my company, its high voltage input terminal is 10KV, low-voltage output is 400V, in low-voltage output parallel connection with reactive power compensation electrical control cubicles, the required voltage signal of reactive controller in compensation electrical control cubicles is connected in the A of low-voltage output through fuse, in B two-phase, the required current signal of reactive controller seals in C upper acquisition mutually by sampled current transformer, sampled current transformer no-load voltage ratio is 1600:5, 10 groups of 20Kvar building-out capacitors that reactive controller is controlled are in parallel with transformer low voltage output through air switch and A.C. contactor respectively, the active power that gauge table shows under normal circumstances and the ratio of reactive power are 3:1 or more, but due to existing Workshop Production order deficiency, make transformer often in underload or no load condition, under this state, electrical control cubicles is not substantially in working or concussion state, simultaneously, due to above-mentioned transformer adopting 10KV high-voltage meter, that is to say that the reactive power that transformer itself produces also counts (being negligible at full capacity) in gauge table simultaneously, under this state, watch active power and the reactive power ratio of gauge table, in 1:1 or 1:2 state, so, under underload and no load condition, electrical control cubicles does not have inactive power compensation, as can be seen here, the deficiency of this structure has caused the reactive power of circuit to exceed standard, monthly collected the reactive power compensation expense of the many units of 2000-2800 by power administration more, also claim power factor adjustment charge, at least this enterprise has increased unnecessary electric cost.

Summary of the invention

The purpose of this utility model be solve above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, reduce energy waste, cut down expenses for the reactive compensation controlling device under underload or no load condition.

The utility model solves the technical scheme that its technical problem adopts:

A kind of for the reactive compensation controlling device under underload or no load condition, comprise electrical network, 1000Kvar transformer and building-out capacitor cabinet, in described building-out capacitor cabinet, be provided with reactive controller, fuse, current transformer and 10 groups of electric capacity, the low-voltage output shunt capacitance cabinet of described 1000Kvar transformer, the required voltage signal of described reactive controller accesses the A of step-down side through fuse, in B two-phase, the C that described current signal is serially connected in step-down side by current transformer goes up mutually, it is characterized in that described 10 groups of electric capacity are respectively one group of 3 Kvar electric capacity, two group of 5 Kvar electric capacity, one group of 8 Kvar electric capacity and six group of 20 Kvar electric capacity, one group of 3 Kvar electric capacity, two group of 5 Kvar electric capacity, the total air switch on A.C. contactor and electrical network is in parallel with the low-pressure end of transformer respectively for one group of 8 Kvar electric capacity and six group of 20 Kvar electric capacity, described current transformer ratio is 600:5, be beneficial to eliminate concussion and the off position of building-out capacitor cabinet in the time of underload, the low-pressure side of described transformer is provided with 10Kvar building-out capacitor, described 10Kvar building-out capacitor is in parallel with the electrical network of the low-pressure side of transformer through air switch, so that the capacity current that the inductance current that transformer produces and building-out capacitor produce is cancelled out each other, guarantee that transformer does not produce reactive power when zero load.

The utility model is owing to adopting said structure, have simple in structure, reduce energy waste, the advantage such as cut down expenses.

accompanying drawing explanation

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

Reference numeral: electrical network 1,1000Kvar transformer 2, building-out capacitor cabinet 3, reactive controller 4, fuse 5, current transformer 6, one group of 3 Kvar electric capacity 7, two group of 5 Kvar electric capacity 8, one group of 8 Kvar electric capacity 9, six group of 20 Kvar electric capacity 10, A.C. contactor 11, total air switch 12,10Kvar building-out capacitor 13, air switch 14.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further illustrated:

As shown in drawings, a kind of for the reactive compensation controlling device under underload or no load condition, comprise electrical network 1, 1000Kvar transformer 2 and building-out capacitor cabinet 3, in described building-out capacitor cabinet 3, be provided with reactive controller 4, fuse 5, 6 and 10 groups of electric capacity of current transformer, the low-voltage output shunt capacitance cabinet 3 of described 1000Kvar transformer 2, the required voltage signal of described reactive controller 4 accesses the A of transformer 2 low-pressure ends through fuse 5, in B two-phase, the C that described current signal is serially connected in transformer 2 low-pressure ends by current transformer 6 goes up mutually, it is characterized in that described 10 groups of electric capacity are respectively one group of 3 Kvar electric capacity 7, two group of 5 Kvar electric capacity 8, one group of 8 Kvar electric capacity 9 and six group of 20 Kvar electric capacity 10, one group of 3 Kvar electric capacity, two group of 5 Kvar electric capacity, the total air switch 12 on A.C. contactor 11 and electrical network 1 is in parallel with the low-pressure end of transformer 2 respectively for one group of 8 Kvar electric capacity and six group of 20 Kvar electric capacity, described current transformer ratio is 600:5, be beneficial to eliminate concussion and the off position of building-out capacitor cabinet 3 in the time of underload, the low-pressure side of described transformer 2 is provided with 10Kvar building-out capacitor 13, described 10Kvar building-out capacitor 13 is in parallel with the electrical network of the low-pressure side of transformer 2 through air switch 14, so that the capacity current that the inductance current that transformer 2 produces and building-out capacitor produce is cancelled out each other, guarantee that transformer 2 does not produce reactive power when zero load, through this improvement, make more than the ratio of the meritorious number of degrees in gauge table and the idle number of degrees reached 3.3:1, thereby cancel power factor adjustment charge monthly, make the power consumption cost of enterprise reach normal.

Claims

1. one kind for the reactive compensation controlling device under underload or no load condition, comprise electrical network, 1000Kvar transformer and building-out capacitor cabinet, in described building-out capacitor cabinet, be provided with reactive controller, fuse, current transformer and 10 groups of electric capacity, the low-voltage output shunt capacitance cabinet of described 1000Kvar transformer, the required voltage signal of described reactive controller accesses the A of step-down side through fuse, in B two-phase, the C that described current signal is serially connected in step-down side by current transformer goes up mutually, it is characterized in that described 10 groups of electric capacity are respectively one group of 3 Kvar electric capacity, two group of 5 Kvar electric capacity, one group of 8 Kvar electric capacity and six group of 20 Kvar electric capacity, one group of 3 Kvar electric capacity, two group of 5 Kvar electric capacity, the total air switch on A.C. contactor and electrical network is in parallel with the low-pressure end of transformer respectively for one group of 8 Kvar electric capacity and six group of 20 Kvar electric capacity, described current transformer ratio is 600:5, the low-pressure side of described transformer is provided with 10Kvar building-out capacitor, described 10Kvar building-out capacitor is in parallel with the electrical network of the low-pressure side of transformer through air switch.