CN-116316818-B - Method, device, medium and equipment for adjusting openable capacity of distributed photovoltaic

CN116316818BCN 116316818 BCN116316818 BCN 116316818BCN-116316818-B

Abstract

The method, the device, the medium and the equipment for adjusting the distributed photovoltaic openable capacity comprise the steps of obtaining the photovoltaic on-way capacity corresponding to a 220kV transformer substation and the minimum load of the 220kV transformer substation, calculating to obtain the first openable capacity of the 220kV transformer substation according to the photovoltaic on-way capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation, and obtaining the second openable capacity corresponding to the lower-stage transformer substation, wherein the lower-stage transformer substation receives power provided by the 220kV transformer substation, and adjusting the target openable capacity of the lower-stage transformer substation according to the first openable capacity and the second openable capacity. The first openable capacity of the 220kV transformer substation can be obtained through the photovoltaic on-way capacity and the minimum load of the 220kV transformer substation. And adjusting the target openable capacity of the lower-stage power substation by the second openable capacity and the first openable capacity of the lower-stage power substation.

Inventors

HAN TIANHUA
HAN JINGLIN
FENG TAO
LI HONGTAO
HU PING
LIU GUOPING
LI HUIBIN
DONG XIN
HAN SHENGFENG

Assignees

国网河北省电力有限公司邢台供电分公司
国网河北省电力有限公司
国家电网有限公司

Dates

Publication Date: 20260505
Application Date: 20230215

Claims (7)

1. A method for adjusting the openable capacity of a distributed photovoltaic device, comprising: Acquiring the photovoltaic in-transit capacity corresponding to a 220kV transformer substation and the minimum load of the 220kV transformer substation; according to the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation, calculating to obtain a first openable capacity of the 220kV transformer substation; acquiring a second openable capacity corresponding to a lower-level substation, wherein the lower-level substation receives the power provided by the 220kV substation; Adjusting the target openable capacity of the lower-level power substation according to the first openable capacity and the second openable capacity; the calculating, according to the photovoltaic in-transit capacity corresponding to the 220kV substation and the minimum load of the 220kV substation, the first openable capacity of the 220kV substation includes: according to the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation, calculating to obtain the first openable capacity of the 220kV transformer substation, wherein the calculation formula of the first openable capacity of the 220kV transformer substation is as follows: , w p is the photovoltaic in-transit capacity of the 220kV transformer substation, and is the minimum load of the 220kV transformer substation; The lower-level substation is a 110kV substation, wherein the obtaining the second openable capacity corresponding to the lower-level substation comprises: The 110kV obtains the total capacity of the 110kV transformer substation, the maximum value of the main transformer capacity of the 110kV transformer substation, the photovoltaic in-transit capacity of the 110kV transformer substation and the minimum load of the 110kV transformer substation; Calculating to obtain a second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic in-transit capacity of the 110kV substation and the minimum load of the 110kV substation; The calculating to obtain the second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic in-transit capacity of the 110kV substation and the minimum load of the 110kV substation comprises the following steps: Calculating to obtain a second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic in-transit capacity of the 110kV substation and the minimum load of the 110kV substation, wherein the second openable capacity calculation formula comprises: Wherein S Sb is the total capacity of the 110kV transformer substation, Is the maximum value of the main transformer capacity of the 110kV transformer substation, W p is the photovoltaic in-transit capacity of the 110kV transformer substation, And (5) the minimum load of the 110kV transformer substation.
2. The method for adjusting the openable capacity of a distributed photovoltaic according to claim 1, further comprising: if the capacity of a transformer connected with the 110kV transformer substation is smaller than or equal to a preset capacity threshold value, obtaining the rated capacity of the transformer substation of the transformer; And calculating the openable capacity corresponding to the transformer according to the rated capacity of the transformer substation, the photovoltaic in-transit capacity of the transformer and the minimum load of the transformer.
3. The method for adjusting the openable capacity of the distributed photovoltaic system according to claim 2, wherein the calculating the openable capacity of the transformer according to the rated capacity of the transformer substation, the photovoltaic in-transit capacity of the transformer and the minimum load of the transformer comprises: Calculating to obtain openable capacity corresponding to the transformer according to rated capacity of a transformer substation of the transformer, photovoltaic in-transit capacity of the transformer and minimum load of the transformer, wherein a calculation formula of the openable capacity corresponding to the transformer is as follows , S Tr is the rated capacity of the transformer, and W p is the photovoltaic in-transit capacity of the transformer, which is the minimum load of the transformer.
4. The method for adjusting the openable capacity of a distributed photovoltaic system according to claim 1, wherein the second openable capacity is a plurality of the openable capacities, and wherein adjusting the target openable capacity of the lower-level power substation according to the first openable capacity and the second openable capacity comprises: calculating a sum of a plurality of the second openable capacities; And if the sum of the second openable capacities is larger than the first openable capacity, reducing the second openable capacity of the lower-level power substation to obtain the target openable capacity.
5. A distributed photovoltaic openable capacity adjustment apparatus for implementing the distributed photovoltaic openable capacity adjustment method of claim 1, comprising: The first acquisition module is used for acquiring the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation; The calculation module is used for calculating and obtaining the first openable capacity of the 220kV transformer substation according to the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation; The second acquisition module is used for acquiring a second openable capacity corresponding to a lower-level substation, wherein the lower-level substation receives the power provided by the 220kV substation; And the adjusting module is used for adjusting the target openable capacity of the lower-level substation according to the first openable capacity and the second openable capacity.
6. A computer readable storage medium storing a computer program for executing the method of adjusting a distributed photovoltaic openable capacity according to any one of the preceding claims 1 to 4.
7. An electronic device, the electronic device comprising: A processor; A memory for storing the processor-executable instructions; The processor is configured to perform the method for adjusting the openable capacity of the distributed photovoltaic system according to any one of claims 1 to 4.

Description

Method, device, medium and equipment for adjusting openable capacity of distributed photovoltaic Technical Field The application relates to the technical field of openable capacity adjustment, in particular to a method, a device, a medium and equipment for adjusting openable capacity of a distributed photovoltaic. Background Longitudinal dispatching, transmission and distribution, coordination planning of power utilization, source, network, load and storage, transverse multi-energy complementary optimization configuration of various flexible resources, and construction of a novel power system mainly based on new energy. The distributed power supply is connected in a large scale, especially the low voltage distributed power supply is imperfect in management, which causes the problems of reverse heavy overload of distribution transformer, out-of-limit fluctuation of voltage in a transformer area, harmonic pollution, overhigh line loss rate and the like. For standardizing the access of the distributed photovoltaic power generation, the power grid enterprises are required to provide the openable capacity information of the distributed power generation of the power grid so as to guide the new energy power generation investment, thereby ensuring the safe operation of the power grid. However, in the prior art, factors such as main transformer safe operation verification, transmission and distribution network topology verification, photovoltaic accessed capacity, photovoltaic in-transit capacity, minimum load and the like are not considered in calculation of the openable capacity of the distributed photovoltaic, so that a calculation result is inaccurate. Disclosure of Invention The present application has been made to solve the above-mentioned technical problems. The embodiment of the application provides a method, a device, a medium and equipment for adjusting the openable capacity of a distributed photovoltaic, which improve the calculation accuracy of the openable capacity of the distributed photovoltaic. According to one aspect of the present application, there is provided a method for adjusting a openable capacity of a distributed photovoltaic, including: Acquiring the photovoltaic in-transit capacity corresponding to a 220kV transformer substation and the minimum load of the 220kV transformer substation; according to the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation, calculating to obtain a first openable capacity of the 220kV transformer substation; acquiring a second openable capacity corresponding to a lower-level substation, wherein the lower-level substation receives the power provided by the 220kV substation; and adjusting the target openable capacity of the lower-level power substation according to the first openable capacity and the second openable capacity. In an embodiment, the calculating the first openable capacity of the 220kV substation according to the photovoltaic in-transit capacity corresponding to the 220kV substation and the minimum load of the 220kV substation includes: according to the photovoltaic in-transit capacity corresponding to the 220kV transformer substation and the minimum load of the 220kV transformer substation, calculating to obtain the first openable capacity of the 220kV transformer substation, wherein the calculation formula of the first openable capacity of the 220kV transformer substation is as follows: W p is the photovoltaic in-transit capacity of the 220kV transformer substation, and the minimum load of the 220kV transformer substation is the minimum load. In an embodiment, the lower-level substation is a 110kV substation, and the acquiring the second openable capacity corresponding to the lower-level substation includes: The 110kV obtains the total capacity of the 110kV transformer substation, the maximum value of the main transformer capacity of the 110kV transformer substation, the photovoltaic in-transit capacity of the 110kV transformer substation and the minimum load of the 110kV transformer substation; And calculating to obtain a second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic in-transit capacity of the 110kV substation and the minimum load of the 110kV substation. In an embodiment, the calculating the second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic in-transit capacity of the 110kV substation, and the minimum load of the 110kV substation includes: Calculating to obtain a second openable capacity corresponding to the lower-level substation according to the total capacity of the 110kV substation, the maximum value of the main transf