CN101764411A

CN101764411A - Reactive power compensation optimizing configuration calculator for transformer substation and optimizing configuration method thereof

Info

Publication number: CN101764411A
Application number: CN200910312703A
Authority: CN
Inventors: 田田; 殷伟; 江卫中; 郑爱霞; 吴奕; 姜学宝; 黄坚; 吴强
Original assignee: BEIJING JIU RUI FU SOFTWARE TECHNOLOGY DEVELOPMENT Co Ltd; Suzhou Power Supply Co Ltd of Jiangsu Electric Power Co
Current assignee: BEIJING JIU RUI FU SOFTWARE TECHNOLOGY DEVELOPMENT Co Ltd; Suzhou Power Supply Co Ltd of Jiangsu Electric Power Co
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-06-30
Anticipated expiration: 2029-12-30
Also published as: CN101764411B

Abstract

The invention relates to a reactive power compensation optimizing configuration calculator for transformer substation and an optimizing configuration method thereof. The calculator is connected with a data acquisition and monitoring system of a power system through a network and comprises an active data input module, a reactive data input module, a reactive compensation and optimizing configuration calculating module and a result output module. The method comprises the following steps of: calculating reactive power compensation demanding capacities of each time to form reactive power compensation demanding capacity queues; then sequencing the queues from large to small; deleting 1 percent of maximum values; setting a calculating precision and a number of sets of compensation demanding equipment; adopting a method of exhaustion to calculate the coverage rates of all capacitor combinations or reactor combinations; taking a combination with a maximum coverage rate as a final result; and if the coverage rates of two combinations are the same, taking the combination with a small capacity difference as a final result. The invention is beneficial to reducing the operation loss of power grids and improving the control quality of voltage.

Description

Reactive power compensation optimizing configuration calculator for transformer substation and the method for distributing rationally thereof

Technical field

The present invention relates to equipment and optimization method that a kind of power system transformer substation reactive power compensation is optimized.

Background technology

Substation operation is after a period of time, it supplies load basicly stable, at this moment can supply the moving law of load to be replaced by the transforming plant main transformer depressor according to it (be called for short: capacitor or reactor that reactive power compensation is provided main transformer), by employing capacity more suitably capacitor or reactor, can carry out effective reactive power compensation to load, make that effective control time of automatic voltage control system is elongated, make that reducing grid loss reduces.

In the transformer station to a main transformer, mainly be subjected to the restriction in place, one well matched one to two reactive-load compensation equipment (capacitor or reactor), the major parameter of reactive-load compensation equipment is exactly its capacity, select suitable capacity can improve the safety economy level of electrical network greatly according to part throttle characteristics, but in the past owing to lack effective analysis means, comparatively random to the reactive-load compensation equipment choice of capacity, this reactive-load compensation equipment that causes installing is owing to reasons such as voltage constraints, often can not put into operation in practice, this has not only wasted equipment investment, and makes electrical network lack reactive power compensation, cause user's voltage higher or on the low side, influence power supply quality.

Summary of the invention

In order to overcome the deficiencies in the prior art, the method that the invention provides a kind of reactive power compensation optimizing configuration calculator for transformer substation and distribute rationally, solve electrical network and can not carry out reactive power compensation in time, accurately and efficiently, can not determine the needed suitable capacity of main transformer reactive-load compensation equipment fast, cause user's voltage higher or on the low side, influence the technical problem of power supply quality.

The technical solution adopted for the present invention to solve the technical problems is:

This reactive power compensation optimizing configuration calculator for transformer substation, be connected with surveillance with the electric power system data collection by network, it is characterized in that comprising following functional module: meritorious and idle data input module, computing module and output module are as a result distributed in reactive power compensation rationally, above-mentioned meritorious and idle data input module such as grade is distributed computing module rationally with reactive power compensation and is connected, the idle data that computing module receives the on high-tension side measurement data of transformer main transformer and corresponding reactive power compensator in the electrical network are distributed in reactive power compensation rationally, and analyze needed reactive power compensation demand, be optimized calculating then, provide idle work optimization allocation plan, then by the result of output module output as a result to this main transformer.

The above-mentioned computing module of distributing rationally is connected with following functional module in turn from data input pin to data output end:

Reactive power compensation demand computing module: the capacity that is used to calculate each needs of reactive power compensation constantly;

Order module: each reactive power compensation is constantly needed capacity, from big to small ordering;

Optimizing calculation module: the optimizing capacity that calculates each capacitor or reactor according to the precision of prior setting with the method for exhaustion.

Each module in the above-mentioned functions module can corresponding Programmable Logic Controller, Programmable Logic Controller is made up of central processor unit and the input data storage cell, dateout memory cell, system program memory cell, application storage unit, network interface card and the power supply that are attached thereto, connects with netting twine by network interface card between each Programmable Logic Controller.

The above-mentioned functions module also can be integrated in the Programmable Logic Controller.

A kind ofly use above-mentioned reactive power compensation optimizing configuration calculator for transformer substation, carry out the method that transformer station's reactive power compensation is distributed rationally, it is characterized in that following steps are arranged:

Step 1, application aforementioned calculation device calculates each reactive power compensation constantly of transformer station needs capacity, and forming reactive power compensation needs the capacity formation;

Step 2 sorts formation from big to small;

Step 3, the maximum of deletion 1%;

Step 4 is provided with computational accuracy and needs compensation equipment group number;

Step 5 adopts the method for exhaustion to calculate the coverage rate of all capacitor banks or reactor combination;

Step 6, the combination of getting the coverage rate maximum if the coverage rate of two cover combinations is identical, are got the little combination of capacity difference as final result as final result.

The present invention gathers the main transformer load data, calculate then, provide the optimizing capacity of carrying out the equipment of reactive power compensation for this main transformer load, by adopting by capacitor that provides capacity configuration or reactor, can carry out effective reactive power compensation to load, make that effective control time of automatic voltage control system is elongated, make operation loss of power grids reduce.The user is as using calculator, and the on high-tension side data such as meritorious, idle of input main transformer are installed the configuration result that has just provided should main transformer.By the present invention, power system reactive power compensation designing technique personnel just can determine the needed suitable capacity of main transformer reactive-load compensation equipment fast, avoid user's voltage higher or on the low side.The result who provides according to this device disposes the main transformer capacitor or reactor helps to improve control quality of voltage.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the actual use of a present invention schematic diagram.

Fig. 2 is the modular structure figure of calculator of the present invention.

Fig. 3 is a reactive power compensation optimizing configuration calculator for transformer substation hardware schematic diagram.

Fig. 4 is that coverage rate is calculated schematic diagram.

Fig. 5 distributes calculation flow chart rationally.

Fig. 6 calculates the coverage rate that the 17th row (3,2) makes up in the table 2 in the example to calculate schematic diagram.

Embodiment

Referring to Fig. 1, this reactive power compensation optimizing configuration calculator for transformer substation, be connected with surveillance (SCADA) with the electric power system data collection by network, obtain the idle data of on high-tension side meritorious, idle data of transformer main transformer in the electrical network and corresponding reactive power compensator.

Referring to Fig. 2, this reactive power compensation optimizing configuration calculator for transformer substation comprises that meritorious and idle data input module, reactive power compensation distribute computing module, output module as a result rationally.

Above-mentionedly meritorious distribute computing module rationally with idle data input module and reactive power compensation and be connected, the idle data of on high-tension side real time data of transformer main transformer and corresponding reactive power compensator in this computing module reception electrical network, and analyze needed reactive power compensation demand, be optimized calculating then, provide idle work optimization allocation plan this main transformer.

Referring to Fig. 3, each module in the above-mentioned functions module can corresponding PLC Programmable Logic Controller, the PLC Programmable Logic Controller that the PLC Programmable Logic Controller is made up of central processor unit (CPU) and the input data storage cell that is attached thereto, dateout memory cell, system program memory cell, application storage unit, network interface card and power supply.Connect with netting twine by network interface card between each Programmable Logic Controller PLC plate.For the more intense central processing unit of computing capability, also can adopt a PLC firm and hard existing.

Referring to Fig. 4, reactive power compensation optimizing configuration calculator for transformer substation adopts the method for exhaustion to calculate the coverage rate of all capacitor banks or reactor combination, and 1, reactive power compensator the input staircase curve and the actual compensated demand curves lap area that constitute be S1; 2, the lap area is not S2; 3, the coverage rate index equal the lap area divided by lap area and lap area not and, that is: S1/ (S1+S2).

Referring to Fig. 5, the application reactive power compensation optimizing configuration calculator for transformer substation carries out reactive power compensation and distributes Calculation Method rationally:

Step 1 is calculated the respectively capacity of the demand of reactive power compensation constantly, forms the formation of reactive power compensation demand capacity;

Step 2 sorts formation from big to small;

Step 3, the maximum of deletion 1%;

Illustrate as follows:

Such as, the transformer main transformer is at 1 o'clock to the 6 o'clock morning reactive requirement hourly such as table 1 in the electrical network:

Table 1

According to step 1, the

formation formation

1,6,3,4,2,5};

Step 2, the ordering obtain

new formation

6,5,4,3,2,1};

Step 3, obtain revised

formation

6,5,4,3,2,1} (because data be less than 100, so there is not deleted data);

Step 4, computational accuracy is set to 1Mvar, and compensation equipment group number is 2, and Mvar is the unit of power.

Step 5, exhaustive all possible combination are also calculated coverage rate, as table 2:

Table 2

Step 6, the combination of getting the coverage rate maximum are as final result, if the coverage rate of two cover combinations is identical, get the little combination of capacity difference as final result: (3,1) combination and (3,2) combination coverage rate are the highest and identical, (3,1) Zu He capacity difference is 3-1=2, and the capacity difference of (3,2) combination is 3-2=1, (3,2) Zu He capacity difference is little, so (3,2) combination is passed to output module output as final configuration result.

Calculate in the example, the overlapping area of (3,2) combination of the 17th row and reactive power compensation demand curve as shown in Figure 6 in the table 2.

Claims

1. reactive power compensation optimizing configuration calculator for transformer substation, be connected with surveillance with the electric power system data collection by network, it is characterized in that comprising following functional module: meritorious and idle data input module, computing module and output module are as a result distributed in reactive power compensation rationally, above-mentioned meritorious and idle data input module such as grade is distributed computing module rationally with reactive power compensation and is connected, the idle data that computing module receives the on high-tension side measurement data of transformer main transformer and corresponding reactive power compensator in the electrical network are distributed in reactive power compensation rationally, and analyze needed reactive power compensation demand, be optimized calculating then, provide idle work optimization allocation plan, then by the result of output module output as a result to this main transformer.

2. reactive power compensation optimizing configuration calculator for transformer substation according to claim 1 is characterized in that the above-mentioned computing module of distributing rationally is connected with following functional module in turn from data input pin to data output end:

3. reactive power compensation optimizing configuration calculator for transformer substation according to claim 2, it is characterized in that: each module in the above-mentioned functions module can corresponding Programmable Logic Controller, Programmable Logic Controller is made up of central processor unit and the input data storage cell, dateout memory cell, system program memory cell, application storage unit, network interface card and the power supply that are attached thereto, connects with netting twine by network interface card between each Programmable Logic Controller.

4. reactive power compensation optimizing configuration calculator for transformer substation according to claim 2 is characterized in that: the above-mentioned functions module is integrated in the Programmable Logic Controller.

5. use above-mentioned reactive power compensation optimizing configuration calculator for transformer substation, carry out the method that transformer station's reactive power compensation is distributed rationally for one kind, it is characterized in that following steps are arranged:

Step 2 sorts formation from big to small;

Step 3, the maximum of deletion 1%;