Emergency accurate control method and system for large-scale interruptible loads

Patent metadata

Field	Value
Publication number	US-10886740-B2
Application number	US-201916409564-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	Feb 1, 2019
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

Provided is an emergency accurate control method and system for large-scale interruptible loads. The method includes: acquiring, by a region control master station, a sheddable load sequence table; acquiring, by the region control master station, a first to-be-shed load; performing, by the region control master station, minimum under-shedding matching layer by layer according to the first to-be-shed load, and shedding a sheddable load corresponding to control substation matching with the first to-be-shed load; and sending, by the region control master station, a second to-be-shed load to the corresponding control substation for load shedding if the second to-be-shed load exists.

First claim

What is claimed is:

1. An emergency accurate control method for large-scale interruptible loads, applied to an emergency accurate control system for large-scale interruptible loads, wherein the emergency accurate control system for interruptible loads comprises a region control master station, a plurality of control substations, and a plurality of load control terminals; the region control master station is connected with the plurality of control substations; each control substation of the plurality of control substations is connected with at least one load control terminal of the plurality of load control terminals; the at least one load control terminal connected to the each control substation is configured on at least one layer, the at least one layer is in one-to-one correspondence with the at least one load control terminal and is used to represent a load shedding priority of the at least one load control terminal;
wherein the method comprises:
acquiring, by the region control master station, a sheddable load sequence table, wherein the sheddable load sequence table comprises a sheddable load of each layer of the each control substation;
acquiring, by the region control master station, first to-be-shed load information indicating a first to-be-shed load;
performing, by the region control master station, minimum under-shedding matching layer by layer between the first to-be-shed load and the sheddable load of the each layer of the each control substation in the sheddable load sequence table, and shedding a sheddable load corresponding to at least one control substation matching with the first to-be-shed load; and
in a case where a difference between the first to-be-shed load and the matched sheddable load corresponding to the at least one control substation is not zero, determining the difference to be a second to-be-shed load, and sending, by the region control master station, second to-be-shed load information for indicating the second to-be-shed load to a to-be-shed control substation for load shedding in a case of existence of the second to-be-shed load.

2. The method according to claim 1 , wherein acquiring, by the region control master station, the sheddable load sequence table comprises:
receiving, by the region control master station, sheddable load information indicating a sheddable load, sent by the each control substation, of each layer of the each control substation, and generating the sheddable load sequence table,
wherein the sheddable load of each layer of the each control substation is obtained from collection and calculation of the sheddable load information received by the each control substation from all the plurality of load control terminals connected to the each control substation, and the sheddable load information of each load control terminal of the plurality of load control terminals comprises a total power of all sheddable load branches under the each load control terminal.

3. The method according to claim 2 , further comprising:
performing, by the to-be-shed control substation, the load shedding according to the second to-be-shed load,
wherein performing, by the to-be-shed control substation the load shedding according to the second to-be-shed load comprises:
acquiring, by the each control substation, a sheddable terminal load sequence table;
performing, by the to-be-shed control substation, the minimum under-shedding matching layer by layer in the sheddable terminal load sequence table according to the second to-be-shed load, and shedding a sheddable load corresponding to at least one load control terminal matching with the second to-be-shed load; and
in a case where a difference between the second to-be-shed load and the matched sheddable load corresponding to at least one load control terminal matching with the second to-be-shed load is not zero, determining the difference to be a third to-be-shed load, and sending, by the to-be-shed control substation, third to-be-shed load information indicating the third to-be-shed load to a to-be-shed load control terminal for load shedding in a case of existence of the third to-be-shed load.

4. The method according to claim 3 , further comprising:
performing, by the to-be-shed load control terminal, the load shedding according to the third to-be-shed load,
wherein performing, by the to-be-shed load control terminal, the load shedding according to the third to-be-shed load comprises:
sorting, by the to-be-shed load control terminal, all sheddable load branches under the to-be-shed load control terminal using quicksort in an order of descending priority, and generating a sheddable load branch sequence table; and
performing, by the to-be-shed load control terminal, the minimum under-shedding matching in the sheddable load branch sequence table according to the third to-be-shed load, and shedding a load corresponding to at least one sheddable load branch matching with the third to-be-shed load.

5. The method according to claim 1 , wherein the region control master station communicates with the plurality of control substations through a 2M channel of a Synchronous Digital Hierarchy (SDH) backbone transmission network; and the control substations communicate with the plurality of load control terminals in any one of or a combination of ways of a group consisting of: shared 2M channel for communication optical cables, exclusive 2M channel for coaxial cables, and wireless communication via 4G private network and Ethernet.

6. An emergency accurate control system for large-scale interruptible loads, comprising: a region control master station, a plurality of control substations and a plurality of load control terminals, wherein the region control master station is connected with the plurality of control substations, and each control substation of the plurality of control substations is connected with at least one load control terminal of the plurality of load control terminals; the at least one load control terminal connected to the each control substation is configured on at least one layer, the at least one layer is in one-to-one correspondence with the at least one load control terminal and is used to represent a load shedding priority of the at least one load control terminal;
wherein the region control master station is configured to:
acquire a sheddable load sequence table, wherein the sheddable load sequence table comprises a sheddable load of each layer of the each control substation;
acquire first to-be-shed load information indicating a first to-be-shed load;
perform minimum under-shedding matching layer by layer between the first to-be-shed load and the sheddable load of the each layer of the each control substation in the sheddable load sequence table, and shed a sheddable load corresponding to at least one control substation matching with the first to-be-shed load; and
in a case where a difference between the first to-be-shed load and the matched sheddable load corresponding to the at least one control substation is not zero, determine the difference to be a second to-be-shed load, and send second to-be-shed load information for indicating the second to-be-shed load to a to-be-shed control substation for load shedding in a case of existence of the second to-be-shed load.

7. The system according to claim 6 , wherein the region control master station is configured to receive sheddable load information indicating a sheddable load, sent by the each control substation, of each layer of the each control substation, and generate the sheddable load sequence table,
wherein the sheddable load of each layer of the each control substation is obtained from collection and calculation of the sheddable load information received by the each control substation from all the plurality of load control terminal

Assignees

• State Grid Jiangsu Electric Power Co Ltd
• Nari Technology Co Ltd

Inventors

• Yin Jijun
• Chen Qing
• Chen Gang
• Lu Xiao
• Luo Jianyu
• Li Haifeng
• Li Xueming
• Luo Kaiming
• Liu Lin
• Yan Yunsong
• Jiang Yefeng
• Ren Jianfeng
• Xia Haifeng

Classifications

• H02J2103/35

  Grid-level management of power transmission or distribution systems, e.g. load flow analysis or active network management · CPC title

• H02J13/1333

  by means of mobile telephony · CPC title

• H02J13/1323

  using optical fibres · CPC title

• H02J13/1311

  using the power network as support for the transmission · CPC title

• H02J3/466 Primary

  Scheduling or selectively controlling the operation of the generators or sources, e.g. connecting or disconnecting generators to meet a demand · CPC title