Power consumption data collection method and system capable of protecting power consumption privacy of users and provided with fault-tolerant mechanism

A technology of power consumption data and fault-tolerant mechanism, applied in the field of smart grid, can solve the problems of lack of fault-tolerant mechanism and inability to decrypt normally, and achieve the effect of improving the fault-tolerance and robustness of the system

Inactive Publication Date: 2016-09-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the biggest problem facing the current technical solution using the homomorphic encryption algorithm is the lack of an effective fault-tolerant mechanism. The ciphertext integrator must receive all ciphertexts sent by SM before it can perform integration operations normally and substitute the private key. Get the sum of electricity consumption
If a SM is damaged, it cannot be decrypted normally

Method used

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  • Power consumption data collection method and system capable of protecting power consumption privacy of users and provided with fault-tolerant mechanism
  • Power consumption data collection method and system capable of protecting power consumption privacy of users and provided with fault-tolerant mechanism
  • Power consumption data collection method and system capable of protecting power consumption privacy of users and provided with fault-tolerant mechanism

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Embodiment Construction

[0022] The implementation will be described in detail below in conjunction with the accompanying drawings.

[0023] A power data acquisition system that protects user privacy and has a fault-tolerant mechanism in a smart grid, such as figure 1 As shown, it includes the power grid dispatching center, the ciphertext collector, the key distributor, and multiple smart meters connected in sequence. The smart meters form a microgroup in pairs and are connected to the ciphertext integrator.

[0024] Step 1. Parameter initialization

[0025] Step 1.1 The key distributor adopts the Paillier homomorphic encryption algorithm to generate the encryption key (g, n) and the decryption key (y, u).

[0026] Paillier algorithm: first select two large prime numbers p, q, y=lcm(p-1,q-1), n=pq. And define a function L(u)=(u-1)÷n; from Select a generator g from among them, and calculate u=(L(g y modn 2 )) -1 modn. The public key is (g, n), and the private key is (y, u).

[0027] Step 1.2 int...

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Abstract

The invention belongs to the technical field of smart power grids, and particularly relates to a power consumption data collection method and system capable of protecting the power consumption privacy of users and provided with a fault-tolerant mechanism in a smart power grid. The method comprises the following steps: classifying two users with similar daily power consumption behaviors into a micro-group, wherein the two users in the same micro-group share a private key, and the sum of the private keys of all the micro-groups is 0; assigning two IDs, which are respectively used for normal charging and power dispatching, for each user; when data is uploaded, firstly judging whether messages are received from all smart meters or not, and carrying out integrated decryption if the messages are received from all the smart meters; if normal decryption is failed due to damages of one smart meter and loss of the corresponding private key, using the message of the other smart meter in the same micro-group as a replacement; recording an ID of the damaged smart meter and notifying the corresponding user to repair the smart meter; and according to the sum of uploaded power consumptions of all the users, drawing a load curve and formulating a dispatching strategy and a power generation plan.

Description

technical field [0001] The invention belongs to the technical field of smart grids, and in particular relates to a method and system for collecting power consumption data in a smart grid that protects user privacy in power consumption and has a fault-tolerant mechanism. Background technique [0002] Due to the current severe environment and resource situation, the government pays more and more attention to efficient and energy-saving smart grid. In addition to normal billing, the smart grid can also formulate dispatching strategies, power generation plans, and dynamic electricity prices according to real-time changes in grid load. This requires the installation of high-frequency data acquisition equipment on the user side to obtain real-time electricity consumption information of users; however, real-time electricity consumption information of users can easily expose the privacy of users at home. [0003] As a result, there have been many technical solutions to protect user...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L29/06H02J13/00
CPCH02J13/0013H04L41/0668H04L41/14H04L63/0428H04L63/06H04L63/0807Y02B70/30Y04S20/20Y04S40/20
Inventor 关志涛司冠林
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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