阅读说明：本技术 一种接地变压器调整高压相序的方法 (A kind of method of grounding transformer adjustment high pressure phase sequence ) 是由 刘培欣 姚爽 马建腾 周芳 郑炜 于 2019-08-06 设计创作，主要内容包括：本发明提供一种接地变压器调整高压相序的方法,包括1号接地变压器和2号接地变压器,1号接地变压器和2号接地变压器低压侧并联前的测试时,需要1号接地变压器和2号接地变压器低压侧中性点分别接地可靠。本发明的有益效果是工作效率高、安全隐患低。(The present invention provides a kind of method of grounding transformer adjustment high pressure phase sequence, including No. 1 grounding transformer and No. 2 grounding transformers, when test before No. 1 grounding transformer and No. 2 grounding transformer low-pressure sides are in parallel, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side neutral points is needed to be grounded respectively reliably.The beneficial effects of the invention are as follows work efficiency is high, security risk is low.)

1. a kind of method of grounding transformer adjustment high pressure phase sequence, it is characterised in that: the method the following steps are included:

It (1) include No. 1 grounding transformer and No. 2 grounding transformers, No. 1 grounding transformer and No. 2 grounding transformer low-pressure sides are simultaneously When test before connection, needs No. 1 grounding transformer and No. 2 grounding transformer low-pressure side neutral points to be grounded respectively reliably, No. 1 is connect Ground transformer and No. 2 grounding transformer high-pressure sides phase sequence end are denoted as A, B and C, and No. 1 grounding transformer low-pressure side phase terminal is remembered Make a1, b1 and c1, No. 2 grounding transformer low-pressure side phase terminals are denoted as a2, b2 and c2；

(2) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by positive sequence ABC, and No. 2 grounding transformer high-pressure side phase sequences press positive sequence ABC, BCA or CAB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and out-phase it Between voltage, voltage is recorded as characteristic value；

(3) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by positive sequence ABC, and No. 2 grounding transformer high-pressure side phase sequences press negative phase-sequence CBA, BCA or ACB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and out-phase it Between voltage, voltage is recorded as characteristic value；

(4) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by negative phase-sequence CBA, and No. 2 grounding transformer high-pressure side phase sequences press positive sequence ABC, BCA or CAB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and out-phase it Between voltage, voltage is recorded as characteristic value；

(5) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by negative phase-sequence CBA, and No. 2 grounding transformer high-pressure side phase sequences press negative phase-sequence CBA, BCA or ACB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and out-phase it Between voltage, voltage is recorded as characteristic value；

(6) step (2), (3), (4) and (5) sequence in no particular order, and by step (2), (3), (4) and (5) statistics characteristic value Summarized；

(7) characteristic value that step (6) summarizes can be used as reference, be adjusted after convenient to the grounding transformer newly to put into operation.

2. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: described 1 Number grounding transformer and No. 2 grounding transformer modes of connection are ZNyn11.

3. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: described 1 The low-pressure side of number grounding transformer and No. 2 grounding transformers includes U with the voltage between phase_a1-a2、U_b1-b2And U_c1-c2, described 1 Voltage number between grounding transformer and the low-pressure side out-phase of No. 2 grounding transformers includes U_a1-b2、U_a1-c2、U_b1-a2、U_b1-c2、 U_c1-a2And U_c1-b2。

4. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: when measurement is new When the low-pressure side of the grounding transformer to put into operation with the voltage between phase is zero, without measuring the low of the grounding transformer newly to put into operation again The voltage between the out-phase of side is pressed, when the low-pressure side for the grounding transformer that measurement newly puts into operation is not zero with the voltage between phase, is needed The voltage between the low-pressure side out-phase of the grounding transformer newly to put into operation is measured again.

5. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: the step Suddenly No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are U in (2)_a1-a2=0, U_c1-c2=0 or U_a1-c2=0, U_b1-a2=0,U_c1-b2=0,OrU_a1-b2=0,U_b1-c2=0, U_c1-a2=0,

6. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: the step Suddenly No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are U in (3)_a1-a2=U, U_a1-b2=2U, U_a1-c2=U, U_b1-a2=2U, U_b1-b2=U, U_b1-c2=U, U_c1-a2=U, U_c1-b2=U, U_c1-c2=2U or U_a1-a2=2U, U_a1-b2=U, U_a1-c2= U、U_b1-a2=U, U_b1-b2=U, U_b1-c2=2U, U_c1-a2=U, U_c1-b2=2U, U_c1-c2=U or U_a1-a2=U, U_a1-b2=U, U_a1-c2 =2U, U_b1-a2=U, U_b1-b2=2U, U_b1-c2=U, U_c1-a2=2U, U_c1-b2=U, U_c1-c2=U.

7. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: the step Suddenly No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are U in (4)_a1-a2=U, U_a1-b2=2U, U_a1-c2=U, U_b1-a2=2U, U_b1-b2=U, U_b1-c2=U, U_c1-a2=U, U_c1-b2=U, U_c1-c2=2U or U_a1-a2=2U, U_a1-b2=U, U_a1-c2= U、U_b1-a2=U, U_b1-b2=U, U_b1-c2=2U, U_c1-a2=U, U_c1-b2=2U, U_c1-c2=U or U_a1-a2=U, U_a1-b2=U, U_a1-c2 =2U, U_b1-a2=U, U_b1-b2=2U, U_b1-c2=U, U_c1-a2=2U, U_c1-b2=U, U_c1-c2=U.

8. a kind of method of grounding transformer adjustment high pressure phase sequence according to claim 1, it is characterised in that: the step Suddenly No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are U in (5)_a1-a2=0, U_b1-b2=0,U_c1-c2=0 or U_a1-c2=0, U_b1-a2=0,U_c1-b2=0,OrU_a1-b2=0,U_b1-c2=0, U_c1-a2=0,

Technical field

The invention belongs to transformer technology fields, more particularly, to a kind of method of grounding transformer adjustment high pressure phase sequence.

Background technique

In existing technology, to reduce investment outlay and installation space, grounding transformer also serves as station local coordinate frame usually as station Internal loading provides power supply, it is contemplated that ground connection does not influence station load when becoming power-off service, normally grounded change low-voltage busbar is using simultaneously The mode of through transport row, and for it is newly-built put into operation or be transformed after the grounding transformer that puts into operation, two grounding transformer low-voltage busbars simultaneously Before connection, it is necessary to carry out phase sequence, phase verification, cause between two grounding transformer low pressure to avoid because of phase sequence, phase difference It generates big circulation and damages grounding transformer.

Summary of the invention

The object of the present invention is to provide a kind of grounding transformer that work efficiency is high, security risk is low adjustment high pressure phase sequences Method.

The technical scheme is that

A kind of method of grounding transformer adjustment high pressure phase sequence is provided, the method the following steps are included:

It (1) include No. 1 grounding transformer and No. 2 grounding transformers, No. 1 grounding transformer and No. 2 grounding transformer low pressure When test before side is in parallel, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side neutral points is needed to be grounded respectively reliably, by 1 Number grounding transformer and No. 2 grounding transformer high-pressure sides phase sequence end are denoted as A, B and C, by No. 1 grounding transformer low-pressure side phase End is denoted as a1, b1 and c1, and No. 2 grounding transformer low-pressure side phase terminals are denoted as a2, b2 and c2；

(2) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by positive sequence ABC, and No. 2 grounding transformer high-pressure side phase sequences are pressed Positive sequence ABC, BCA or CAB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and different Voltage is recorded as characteristic value by the voltage between phase；

(3) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by positive sequence ABC, and No. 2 grounding transformer high-pressure side phase sequences are pressed Negative phase-sequence CBA, BCA or ACB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and different Voltage is recorded as characteristic value by the voltage between phase；

(4) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by negative phase-sequence CBA, and No. 2 grounding transformer high-pressure side phase sequences are pressed Positive sequence ABC, BCA or CAB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and different Voltage is recorded as characteristic value by the voltage between phase；

(5) No. 1 grounding transformer high-pressure side phase sequences are fixedly connected by negative phase-sequence CBA, and No. 2 grounding transformer high-pressure side phase sequences are pressed Negative phase-sequence CBA, BCA or ACB variation connection, measure the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers between phase and different Voltage is recorded as characteristic value by the voltage between phase；

(6) step (2), (3), (4) and (5) sequence in no particular order, and by step (2), (3), (4) and (5) statistics spy Value indicative is summarized；

(7) characteristic value that step (6) summarizes can be used as reference, adjust after convenient to the grounding transformer newly to put into operation It is whole.

Further, No. 1 grounding transformer and No. 2 grounding transformer modes of connection are ZNyn11.

Further, the low-pressure side of No. 1 grounding transformer and No. 2 grounding transformers includes with the voltage between phase U_a1-a2、U_b1-b2And U_c1-c2, the voltage between the low-pressure side out-phase of No. 1 grounding transformer and No. 2 grounding transformers includes U_a1-b2、U_a1-c2、U_b1-a2、U_b1-c2、U_c1-a2And U_c1-b2。

Further, when the low-pressure side of grounding transformer that measurement newly puts into operation is zero with the voltage between phase, do not have to again The voltage between the low-pressure side out-phase of the grounding transformer newly to put into operation is measured, when the low-pressure side for the grounding transformer that measurement newly puts into operation When being not zero with the voltage between phase, need to measure the voltage between the low-pressure side out-phase of the grounding transformer newly to put into operation again.

Further, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are in the step (2) U_a1-a2=0,U_b1-b2=0, U_c1-c2=0 orU_a1-c2=0, U_b1-a2=0, U_c1-b2=0,OrU_a1-b2=0,U_b1-c2=0, U_c1-a2 =0,

Further, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are in the step (3) U_a1-a2=U, U_a1-b2=2U, U_a1-c2=U, U_b1-a2=2U, U_b1-b2=U, U_b1-c2=U, U_c1-a2=U, U_c1-b2=U, U_c1-c2=2U Or U_a1-a2=2U, U_a1-b2=U, U_a1-c2=U, U_b1-a2=U, U_b1-b2=U, U_b1-c2=2U, U_c1-a2=U, U_c1-b2=2U, U_c1-c2 =U or U_a1-a2=U, U_a1-b2=U, U_a1-c2=2U, U_b1-a2=U, U_b1-b2=2U, U_b1-c2=U, U_c1-a2=2U, U_c1-b2=U, U_c1-c2=U.

Further, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are in the step (4) U_a1-a2=U, U_a1-b2=2U, U_a1-c2=U, U_b1-a2=2U, U_b1-b2=U, U_b1-c2=U, U_c1-a2=U, U_c1-b2=U, U_c1-c2=2U Or U_a1-a2=2U, U_a1-b2=U, U_a1-c2=U, U_b1-a2=U, U_b1-b2=U, U_b1-c2=2U, U_c1-a2=U, U_c1-b2=2U, U_c1-c2 =U or U_a1-a2=U, U_a1-b2=U, U_a1-c2=2U, U_b1-a2=U, U_b1-b2=2U, U_b1-c2=U, U_c1-a2=2U, U_c1-b2=U, U_c1-c2=U.

Further, No. 1 grounding transformer and No. 2 grounding transformer low-pressure side voltage relationships are in the step (5) U_a1-a2=0,U_b1-b2=0, U_c1-c2=0 orU_a1-c2=0, U_b1-a2=0, U_c1-b2=0,OrU_a1-b2=0,U_b1-c2=0, U_c1-a2 =0,

The advantages and positive effects of the present invention are: due to the adoption of the above technical scheme, the present invention has rational design, operation It is more convenient, have many advantages, such as to improve working efficiency, reduce security risk.

Detailed description of the invention

Fig. 1 is substation grounding transformer common wiring pattern figure of the invention；

Fig. 2 is the phasor diagram that No. 1 grounding transformer high pressure phase sequence is ABC；

Fig. 3 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of ABC Figure；

Fig. 4 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of BCA Figure；

Fig. 5 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of CAB Figure；

Fig. 6 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of CBA Figure；

Fig. 7 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of BAC Figure；

Fig. 8 be No. 1 grounding transformer high pressure phase sequence be positive sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of ACB Figure；

Fig. 9 is the phasor diagram that No. 1 grounding transformer high pressure phase sequence is CBA；

Figure 10 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of ABC Figure；

Figure 11 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of BCA Figure；

Figure 12 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of CAB Figure；

Figure 13 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of CBA Figure；

Figure 14 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of BAC Figure；

Figure 15 be No. 1 grounding transformer high pressure phase sequence be negative sequence when, No. 2 grounding transformer high pressure phase sequences are the phasor of ACB Figure；

Fig. 2 (a) into Figure 15 is the wiring diagram of No. 1 grounding transformer or No. 2 grounding transformers, (b) is No. 1 ground connection transformation The phasor diagram of device or No. 2 grounding transformers is (c) the phasor splicing figure of No. 1 grounding transformer and No. 2 grounding transformers.

Specific embodiment

It elaborates with reference to the accompanying drawing to the present invention.

As shown in Fig. 1 to Figure 15, the present invention is a kind of method that grounding transformer adjusts high pressure phase sequence.